Tag: environment

Ten years of ecosystem services matrix: Review of a (r)evolution

In recent years, the concept of Ecosystem Services (ES): the benefits people obtain from ecosystems, such as pollination provided by bees for crop growing, timber provided by forests or recreation enabled by appealing landscapes, has been greatly popularised, especially in the context of impeding ecological crises and constantly degrading natural environments. 

Hence, there has been an increasing need for robust and practical methodologies to assess ES, in order to provide key stakeholders and decision-makers with crucial information. One such method to map and assess ES: the ES Matrix approach, has been increasingly used in the last decade.

The ES Matrix approach is based on the use of a lookup table consisting of geospatial units (e.g. types of ecosystems, habitats, land uses) and sets of ES, meant to be assessed for a specific study area, which means that the selection of a particular study area is the starting point in the assessment. Only then, suitable indicators and methods for ES quantification can be defined. Based on this information, a score for each of the ES considered is generated, referring to ES potential, ES supply, ES flow/use or demand for ES. 

Originally developed in a 2009 paper by a team, led by Prof Dr Benjamin Burkhard (Leibniz University Hannover and Leibniz Centre for Agricultural Landscape Research ZALF), the ES Matrix allows the assessment of the capacity of particular ecosystem types or geospatial units to provide ES.

Ten years later, a research led by Dr C. Sylvie Campagne (Leibniz University Hannover, Germany), Dr Philip Roche (INRAE, France), Prof Dr Felix Muller (University of Kiel, Germany) and Prof Dr Benjamin Burkhard conducted a review of 109 published studies applying the ES matrix approach to find out how the ES matrix approach was applied and whether this was done in an oversimplified way or not.

In their recent paper, published in the open-access, peer-reviewed journal One Ecosystem, the review confirms the method’s flexibility, appropriateness and utility for decision-making, as well as its ability to increase awareness of ES. Nevertheless, the ES matrix approach has often been used in a “quick and dirty” way that urges more transparency and integration of variability analyses, they conclude.

“We analysed the diversity of application contexts, highlighted trends of uses and proposed future recommendations for improved applications of the ES matrix. Amongst the main patterns observed, the ES matrix approach allows for the assessment of a higher number of ES than other ES assessment methods. ES can be jointly assessed with indicators for ecosystem condition and biodiversity in the ES matrix,”

explains Campagne.

“Although the ES matrix allows us to consider many data sources to achieve the assessment scores for the individual ES, these were mainly used together with expert-based scoring (73%) and/or ES scores that were based on an already-published ES matrix or deduced by information found in related scientific publications (51%),”

she elaborates. 

In 29% of the studies, an already existing matrix was used as an initial matrix for the assessment and in 16% no other data were used for the matrix scores or no adaptation of the existing matrix used was made. 

“Nevertheless, we recommend to use only scores assessed for a specific study or, if one wishes to use pre-existing scores from another study, to revise them in depth, taking into account the local context of the new assessment,”

she points out.

The researchers also acknowledge the fact that 27% of the reviewed studies did not clearly explain their methodology, which underlines the lack of method elucidation on how the data had been used and where the scores came from. Although some studies addressed the need to consider variabilities and uncertainties in ES assessments, only a minority of studies (15%) did so. Thus, the team also recommends to systematically report and consider variabilities and uncertainties in each ES assessment.

“We emphasise the need for all scientific studies to describe clearly and extensively the whole methodology used to score or evaluate ES, in order to be able to rate the quality of the scores obtained. The increasing number of studies that use the ES matrix approach confirms its success, appropriateness, flexibility and utility to generate information for decision-making, as well as its ability to increase awareness of ES, but the application of the ES matrix has to become more transparent and integrate more variability analyses,”

concludes the research team.

Original source:
Campagne CS, Roche P, Müller F, Burkhard B (2020) Ten years of ecosystem services matrix: Review of a (r)evolution. One Ecosystem 5: e51103. https://doi.org/10.3897/oneeco.5.e51103

The EU not ready for the release of Gene drive organisms into the environment

Gene drive organisms (GDOs) have been suggested as an approach to solve some of the most pressing environmental and public health issues. Currently, it remains unclear what kind of regulations are to be used to cover the potential risks. In their study, published in the open-access journal BioRisk, scientists evaluate the options for an operational risk assessment of GDOs before their release into environments across the EU.

EU scientists are taking a closer look into the CRISPR/Cas-9-induced population-wide genetic modifications before introducing it into practice

Within the last decades, new genetic engineering tools for manipulating genetic material in plants, animals and microorganisms are getting large attention from the international community, bringing new challenges and possibilities. While genetically modified organisms (GMO) have been known and used for quite a while now, gene drive organisms (GDO) are yet at the consideration and evaluation stage. 

The difference between these two technologies, where both are meant to replace certain characters in animals or plants with ones that are more favourable for the human population, is that, even though in GDO there is also foreign “synthetic” DNA being introduced, the inheritance mode differs. In GDO, the genome’s original base arrangements are changed, using CRISPR/Cas-9 genome editing. Once the genome is changed, its alterations are carried down the organism’s offspring and subsequent generations. 

In their study, published in the open-access journal Biorisk, an international group of scientists led by Marion Dolezel from the Environment Agency Austria, discuss the potential risks and impacts on the environment. 

The research team also points to current regulations addressing invasive alien species and biocontrol agents, and finds that the GMO regulations are, in principle, also a useful starting point for GDO.

There are three main areas suggested to benefit from gene drive systems: public health (e.g. vector control of human pathogens), agriculture (e.g. weed and pest control), environmental protection and nature conservation (e.g. control of harmful non-native species).

In recent years, a range of studies have shown the feasibility of synthetic CRISPR-based gene drives in different organisms, such as yeast, the common fruit fly, mosquitoes and partly in mammals. 

Given the results of previous research, the gene drive approach can even be used as prevention for some zoonotic diseases and, hence, possible future pandemics. For example, laboratory tests showed that release of genetically modified mosquitoes can drastically reduce the number of malaria vectors. Nevertheless, potential environment and health implications, related to the release of GDO, remain unclear. Only a few potential applications have so far progressed to the research and development stage.

“The potential of GDOs for unlimited spread throughout wild populations, once released, and the apparently inexhaustible possibilities of multiple and rapid modifications of the genome in a vast variety of organisms, including higher organisms such as vertebrates, pose specific challenges for the application of adequate risk assessment methodologies”,

shares the lead researcher Mrs. Dolezel.

In the sense of genetic engineering being a fastly developing science, every novel feature must be taken into account, while preparing evaluations and guidances, and each of them provides extra challenges.

Today, the scientists present three key differences of gene drives compared to the classical GMO:

1. Introducing novel modifications to wild populations instead of “familiar” crop species, which is a major difference between “classic” GMOs and GDOs.

“The goal of gene drive applications is to introduce a permanent change in the ecosystem, either by introducing a phenotypic change or by drastically reducing or eradicating a local population or a species. This is a fundamental difference to GM crops for which each single generation of hybrid seed is genetically modified, released and removed from the environment after a relatively short period”,

shares Dolezel.

2. Intentional and potentially unlimited spread of synthetic genes in wild populations and natural ecosystems.

Gene flow of synthetic genes to wild organisms can have adverse ecological impact on the genetic diversity of the targeted population. It could change the weediness or invasiveness of certain plants, but also threaten with extinction the species in the wild.

3. Possibility for long-term risks to populations and ecosystems.

Key and unique features of GDOs are the potential long-term changes in populations and large-scale spread across generations. 

In summary, the research team points out that, most of all, gene drive organisms must be handled extremely carefully, and that the environmental risks related to their release must be assessed under rigorous scrutiny. The standard requirements before the release of GDOs need to also include close post-release monitoring and risk management measures.

It is still hard to assess with certainty the potential risks and impact of gene drive applications on the environment, human and animal health. That’s why highly important questions need to be addressed, and the key one is whether genetically driven organisms are to be deliberately released into the environment in the European Union. The High Level Group of the European Commission’s Scientific Advice Mechanism highlights that within the current regulatory frameworks those risks may not be covered.

The research group recommends the institutions to evaluate whether the regulatory oversight of GMOs in the EU is accomodate to cover the novel risks and challenges posed by gene drive applications.

“The final decision to release GDOs into the environment will, however, not be a purely scientific question, but will need some form of broader stakeholder engagement and the commitment to specific protection goals for human health and the environment”,

concludes  Dolezel.

***

Original source:
Dolezel M, Lüthi C, Gaugitsch H (2020) Beyond limits – the pitfalls of global gene drives for environmental risk assessment in the European Union. BioRisk 15: 1-29. https://doi.org/10.3897/biorisk.15.49297

Contact:
Marion Dolezel
Email: marion.dolezel@umweltbundesamt.at

Taxonomist Day at Pensoft: Three species in the WoRMS’ Top 10 Marine Species of 2019 described in our journals

Happy Taxonomist Appreciation Day, everyone!

In a lovely tradition, the World Register of Marine Species (WoRMS) issued the Top 10 Marine Species of 2019 for the ninth time around on time for this special day! 

In what has also already become a tradition we are particularly proud of, it’s not one, but several species described as new to science in Pensoft journals that make it to the renowned list! Even if it’s a slight step back from last year’s five entries, this year, we see a total of three species making it to the list: the Vibranium Fairy Wrasse (Cirrhilabrus wakanda) and the Green Rat Clingfish (Barryichthys algicola), both published in ZooKeys, and Thiel’s Boring Amphipod (Bircenna thieli) first known from the pages of Evolutionary Systematics.

Struggling to put a face to the name? Let us bring the stories behind these fantastic discoveries for you: 


The real-life fairy wrasse, whose scales shine bright like sci-fi vibranium

Even if the “twilight zone” – the ocean depths from 60 to 150 meters underneath the water surface, are long known to be teeming with all sorts of fascinating reef-dwelling lifeforms that still await discovery, California Academy of Sciences’ (CAS) initiative Hope for Reefs and partners are already concerned with the protection of these fragile habitats. One of the ways they do this is by deploying the taxonomic approach: recording and defining every creature the current environmental crisis could be putting in danger.

One of the latest discoveries made by the CAS team and Yi-Kai Tea, lead author and PhD student at the University of Sydney, is a stunning wrasse species with colours so mesmerising and vibrant that immediately triggered the creativity of the scientists. Discovered amongst the dusky coral reefs of eastern Zanzibar, off the coast of Tanzania, the species received the scientific name Cirrhilabrus wakanda in a nod to the Marvel Entertainment comics and movie Black Panther, where Wakanda is a mythical nation. 

The fish also goes under its common name: Vibranium Fairy Wrasse, because of its hypnotising scales reminiscent of the fictional metal. In the franchise, the vibranium is a rare, robust and versatile ore capable of manipulating energy. In its turn, the scales of the Vibranium Fairy Wrasse have a pigment so strong, their shades survive even when preserved.

“When we thought about the secretive and isolated nature of these unexplored African reefs, we knew we had to name this new species after Wakanda,”

said Yi-Kai Tea.

Story via Forbes*

Find more in the WoRMS’ press release.

***

Research article in ZooKeys:

Conway KW, Moore GI, Summers AP (2019) A new genus and two new species of miniature clingfishes from temperate southern Australia (Teleostei, Gobiesocidae). ZooKeys 864: 35-65. https://doi.org/10.3897/zookeys.864.34521


The clingy, yet long unknown green fish

You might think that a common name for a genus of tiny, less than 21 mm long marine inhabitants, such as ‘Rat Clingfish’ is way too unusual already, but it’s getting even more curious when you find out about those species’ mind-boggling lifestyle. 

These two miniature clingfishes were first spotted around microalgae in Australia back in the 1980s and since then they would puzzle scientists so much they would simply refer to them as “Genus B”. However, this was about to change, when in 2019, the US-Australian research team of Drs Kevin W. Conway, Glenn I. Moore and Adam P. Summers collected and studied enough specimens found in dense stands of macroalgae in intertidal and shallow subtidal areas along the coast of southern Australia. There, the two clingfishes use their well-developed adhesive discs located on their tummies to attach to the microalgae. Because of their miniature size, they have evolved multiple reduced and novel distinctive features.

As a result of their study, we now have the genus Barryichthys, whose common name is Rat Clingfish, and two new to science species assigned to it: the Brown Rat Clingfish (Barryichthys hutchinsi) and the Green Rat Clingfish (Barryichthys algicola), where the latter was found to be particularly intriguing thanks to its peculiar green colouration and a species name translated to “one who inhabits the algae”.

Find more in the WoRMS’ press release.

***

Research article in ZooKeys:

Conway KW, Moore GI, Summers AP (2019) A new genus and two new species of miniature clingfishes from temperate southern Australia (Teleostei, Gobiesocidae). ZooKeys 864: 35-65. https://doi.org/10.3897/zookeys.864.34521 


The boring vegetarian amphipod  

Another impressive creature with a taste for algae described in 2019 from Australia is the Thiel’s Boring Amphipod, which is indeed boring. The tiny crustacean, which can be found in colonies of hundreds in Tasmania, eats its way through its favourite bull kelp leaving behind tunnels.

Another peculiarity about the species is its head, which when seen from the front resembles that of an ant!

With its species name: Bircenna thieli, the scientists behind the study – Drs Elizabeth Hughes (Natural History Museum of London, UK) and Anne-Nina Lörz (University of Hamburg, Germany) pay tribute to respected crustacean expert Prof. Dr. Martin Thiel, who had originally collected some of the studied specimens.

Find more in the WoRMS’ press release.

***

Research article in Evolutionary Systematics:

Hughes LE, Lörz A-N (2019) Boring Amphipods from Tasmania, Australia (Eophliantidae: Amphipoda: Crustacea). Evolutionary Systematics 3(1): 41-52. https://doi.org/10.3897/evolsyst.3.35340

19th-century bee cells in a Panamanian cathedral shed light on human impact on ecosystems

About 120 clusters of 19th-century orchid bee nests were found during restoration work on the altarpiece of Basilica Cathedral in Casco Viejo (Panamá). Having conducted the first pollen analysis for these extremely secretive insects, the researchers identified the presence of 48 plant species, representing 23 families.

Casco Viejo, Panamá in 1875, as seen from the summit of Cerro Ancón.
A white tower of the Cathedral where bees were nesting is visible in the distant background in the centre of the peninsula.
Photo by Eadweard Muybridge, courtesy of the Smithsonian American Art Museum; gift of Mitchell and Nancy Steir.

Despite being “neotropical-forest-loving creatures,” some orchid bees are known to tolerate habitats disturbed by human activity. However, little did the research team of Paola Galgani-Barraza (Smithsonian Tropical Research Institute) expect to find as many as 120 clusters of nearly two-centuries-old orchid bee nests built on the altarpiece of the Basilica Cathedral in Casco Viejo (Panamá). Their findings are published in the open-access Journal of Hymenoptera Research.

Locations of nest cell aggregations of Eufriesea surinamensis within the Cathedral in Casco Viejo, Panamá
Photo by Paola Galgani-Barraza

This happened after restoration work, completed in 2018 in preparation for the consecration of a new altar by Pope Francis, revealed the nests. Interestingly, many cells were covered with gold leaf and other golden material applied during an earlier restoration following an 1870 fire, thus aiding the reliable determination of the age of the clusters. The cells were dated to the years prior to 1871-1876.

The bee species, that had once constructed the nests, was identified as the extremely secretive Eufriesea surinamensis. Females are known to build their nests distant from each other, making them very difficult to locate in the field. As a result, there is not much known about them: neither about the floral resources they collect for food, nor about the materials they use to build their nests, nor about the plants they pollinate.

However, by analysing the preserved pollen for the first time for this species, the researchers successfully detected the presence of 48 plant species, representing 43 genera and 23 families. Hence, they concluded that late-nineteenth century Panama City was surrounded by a patchwork of tropical forests, sufficient to sustain nesting populations of what today is a forest-dwelling species of bee.

Not only did the scientists unveil important knowledge about the biology of orchid bees and the local floral diversity in the 19th century, but they also began to uncover key information about the functions of natural ecosystems and their component species, where bees play a crucial role as primary pollinators. Thus, the researchers hope to reveal how these environments are being modified by collective human behaviour, which is especially crucial with the rapidly changing environment that we witness today.

The orchid bee Eufriesea surinamensis
Photo by Paola Galgani-Barraza

Original source:

Galgani-Barraza P, Moreno JE, Lobo S, Tribaldos W, Roubik DW, Wcislo WT (2019) Flower use by late nineteenth-century orchid bees (Eufriesea surinamensis, Hymenoptera, Apidae) nesting in the Catedral Basílica Santa María la Antigua de Panamá. Journal of Hymenoptera Research 74: 65-81. https://doi.org/10.3897/jhr.74.39191

Illegal hunting and bushmeat trade threatens biodiversity and wildlife of Angola

Hunting and bushmeat trade negatively impact wildlife worldwide with serious implications for biodiversity conservation. The current situation in Angola shows a concerning increase in bushmeat trade along main roads. In a recent publication in the open-access journal Nature Conservation, an international group of scientists presented data gathered on a roundtrip around five main Angolan cities. It turned out that the influence of those activities on wildlife population is very unsettling.

Hunting wild animals has been practised by humans for millions of years; however, the extraction of wildlife for subsistence and commercialisation has become a major biodiversity threat in recent decades. Meanwhile, over-exploitation is reported to be the second most important driver of change and biodiversity loss globally. 

To assess the state of affairs, an international group of scientists, led by Dr. Francisco M. P. Gonçalves of the University of Hamburg in Germany, went on a roundtrip along the roads between five main Angolan cities. Their observations made it possible to conclude that, despite the existing legislation, as well as government efforts to handle poaching and bushmeat trade, currently there is no effective law enforcement mechanism to help dealing with the situation.

Map of Africa showing the location of Angola (left) and the provinces covered by the study along the main road from Lubango (Huíla province) to Uíge (right).
Credit: Francisco Maiato P. Gonçalves

In their study, the team also states that Angola is one of the richest and most biodiverse countries in Africa with an estimated 6,850 native and 226 non-native plant species, 940 bird species (including many endemic species), 117 amphibians species, 278 reptile species, 358 freshwater fishes (22% of them endemic) and 275 species of mammals.

The long-lasting civil war in Angola has contributed to the dramatic loss of wildlife and led to the near extinction of many species, as a result of the increase in illegal poaching. A variety of fresh, smoked or dried bushmeat, as well as live animals, are being sold along the roads, mostly to urban dwellers travelling between the main cities of Angola.

Despite the recent outbreaks of diseases (i.e. Ebola in the neighbouring Democratic Republic of Congo), animals still appear to be obtained directly from hunters and slaughtered with no sanitary measures, while the consumption of wildlife in Africa is frequently associated with an increased risk of acquiring zoonotic diseases.

The major trade road runs between the provinces of Bengo and Uíge, where the animals sold include many species of antelopes, monkeys, snakes and a globally protected species of pangolin (Manis tricuspis). Multiple species of wading birds and parrots are often sold in pet shops, as well as along the streets. At fairs and entry points to the main cities, these can be found offered by young boys.


Wild animals and smoked bushmeat on sale along the roadside of the Sequele village, between Bengo and Uíge provinces: Blue duikers, Talapoin and Vervet (green) monkey in the cage on the ground on the left,  Northern Rock Python on the right top and Tree pangolin (bottom right).
Photo by Francisco Maiato P. Gonçalves

Although there is no evidence of cross-border trade, there might, however, be cases of bushmeat trade in the informal markets at the principal border posts. Commercial activities between the countries are not regulated and stay intense, note the scientists.

“We witnessed a Chinese customer looking for pangolins in one of the villages; pangolin scales, when soaked, are trusted for having medicinal properties for a large variety of human illnesses mostly in Asia. It is currently estimated there are 0.4–0.7 million pangolins hunted annually, representing an increase of around 150% only for medicinal purposes over the past four decades,” share the researches.

Wild animals and smoked bushmeat on sale along the roadside of the Sequele village, between Bengo and Uíge provinces: Blue duikers, Talapoin and Vervet (green) monkey in the cage on the ground on the left, Northern Rock Python on the right top and Tree pangolin (bottom right).
Photo by Francisco Maiato P. Gonçalves

Trying to find a solution, the Angolan government has undertaken a number of measures, including: a list of species prohibited for hunting and trade (five of those species were found on the markets during the survey); banning hunting of certain species outside the hunting season; introducing compensation fees.

However, despite the legal basis, local authorities (i.e. police checkpoints close to the road markets) do not take the necessary measures to discourage hunting and bushmeat trade practices in the region. Due to lack of clear definition and responsibility arrangements, the hunting and trade of wild animals remain uncontrolled.

All these recent observations bring us to the necessity for a re-assessment of the wildlife in Angola and the need to produce appropriate legislation to be efficiently enforced across the whole territory of the country.  This can be achieved through better-educated police officials and alternative sources of meat supply in rural areas. These actions should bring down the demand for bushmeat and reduce the overharvesting of wildlife, suggest the scientists.

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Original source:

Gonçalves FMP, Luís JC, Tchamba JJ, Cachissapa MJ, Chisingui AV (2019) A rapid assessment of hunting and bushmeat trade along the roadside between five Angolan major towns. Nature Conservation 37: 151-160. https://doi.org/10.3897/natureconservation.37.37590 


Experiment suggests the best ways to tackle invasive Oregon grape in Belgian coastal dunes

The Belgian coastal dunes, a protected habitat of high conservation value, are getting severely impacted by one of its worst enemies amongst invasive species: the Oregon grape. To help mitigate the detrimental effect of this North American shrub invader, Belgian scientists carried out an experiment to assess the effectiveness of different management methods.

The Belgian coastal dunes, a protected habitat of high conservation value, are getting severely impacted by one of its worst enemies amongst invasive species: the Oregon grape. To help mitigate the detrimental effect of this North American shrub invader, Belgian scientists carried out an experiment to assess the effectiveness of different management methods.

The Atlantic coastal dunes form a dynamic and diverse ecosystem, home to a large number of native species, many of which are regionally threatened. Embryonic dunes, shifting white dunes, moss dunes, dune grasslands, and dune slacks are considered high conservation value sites, according to the interpretation manual of European habitats. However, the dunes are highly affected by external influences, and one of the most important threats to their biodiversity are invasive non-native plant species. These plants often colonised the dunes as garden escapes or spread from garden waste dumps or public plantings. Oregon grape is one of the worst invaders amongst them.

Oregon grape growing on sand dune (Belgium).
Photo by Tim Adriaens.

In their study, published in the open-access journal NeoBiota, the scientists, led by Tim Adriaens and Sam Provoost of the Research Institute for Nature and Forest (INBO), focus on the management of the current populations of Oregon grape (Berberis aquifolium) in the Belgian coastal dunes, where the species has already managed to invade half of the 46 nature reserves and is starting to replace native vegetation. Such a negative effect on the biodiversity of the area requires practical management advice. Due to the high level of infestation of the dunes, the researchers recommend prompt eradication as the most appropriate management strategy. So far, however, it has been unclear which method would show the best effectiveness.

“Invasive shrub species exert an additional pressure on Belgian dune ecosystems, which are already highly fragmented by urbanisation. Oregon grape is one of the worst and should be tackled urgently before it gets out of control,” says Tim Adriaens.

Having compared four previously suggested treatments: manual uprooting, foliar herbicide application, stem cutting followed by herbicide and salt application, the scientists reported herbicide leaf treatment to be the most effective method. Manual removal by digging and treating stems with glyphosate showed medium effectiveness. Treating stems with a saturated salt solution appeared rather cosmetic. However, it’s not that easy to choose which method would be the best to work with, since with herbicide use there are non-target effects on the environment, economy, and society to be considered.

Dune restoration by mechanical removal of dense Oregon grape infestation (left) and leaf treatment of Oregon grape clone with a hand sprayer (right).
Photo by Tim Adriaens.

“Individual clones are best treated with herbicide, large surface areas provide opportunities for landscape-scale ecological restoration, combining invasive shrub removal with sand dune creation,” further explains Tim Adriaens.

In Belgium, Oregon grape was first recorded in the wild in 1906 and naturalised in the period 1920-1950. It has been spreading rapidly since the 1990s. This expansion might be linked to cultivated hybrids and global warming, with the latter leading to a lengthened growing season, suggest the scientists. The species likes calcareous soils. Along the Belgian coast, Oregon grape has mainly invaded grey dunes, scrub and woodland.

Thanks to its numerous blue berries, which are easily dispersed over long distances by songbirds, the plant can appear everywhere within the dunes sites, also in places hardly accessible to managers. With the help of a highly branched root system, the plants attach themselves firmly in the sand, which makes manual pulling of mature plants hardly possible and labor-intensive.

“Dune managers and scientists across Europe should unite to draft alert lists and prioritise established alien species for management,” Tim says in conclusion.

In conclusion, the scientists highlight the importance of an EU-wide collaboration between scientific communities. Invasive species are not bothered by administrative borders and exchanging experiences on impact and management options is crucial to maintain dune ecosystems in good conservation status.

Coastal dunes in Belgium provide unique habitat to many Red listed species.
Photo by Tim Adriaens.

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Original source

Adriaens T, Verschelde P, Cartuyvels E, D’hondt B, Vercruysse E, van Gompel W, Dewulf E, Provoost S (2019) A preliminary field trial to compare control techniques for invasive Berberis aquifolium in Belgian coastal dunes. NeoBiota 53: 41-60. https://doi.org/10.3897/neobiota.53.38183

Revolutionary method could bring us much closer to the description of hyperdiverse faunas

A novel approach relying on a short sequence of mitochondrial DNA in conjunction with a lateral image of the holotype specimen was proposed to greatly accelerate species identification and description, especially when it comes to hyperdiverse taxa, such as parasitic wasps.

At today’s rate, it could take another two millennia for science to document all currently existing species of multicellular life

Two hundred and sixty-one years ago, Linnaeus formalized binomial nomenclature and the modern system of naming organisms. Since the time of his first publication, taxonomists have managed to describe 1.8 million of the estimated 8 to 25 million extant species of multicellular life, somewhere between 7% and 22%. At this rate, the task of treating all species would be accomplished sometime before the year 4,000. In an age of alarming environmental crises, where taking measures for the preservation of our planet’s ecosystems through efficient knowledge is becoming increasingly urgent, humanity cannot afford such dawdling.

“Clearly something needs to change to accelerate this rate, and in this publication we propose a novel approach that employs only a short sequence of mitochondrial DNA in conjunction with a lateral image of the holotype specimen,”

explain the researchers behind a new study, published in the open-access journal Deutsche Entomologische Zeitschrift (DEZ).
Description rate of parasitic wasps species (superfamily
Ichneumonoidea).
Data from Taxapad (Yu et al. 2016).

In standardized practices, it is required that experts conduct plenty of time- and labor-consuming analyses, in order to provide thorough descriptions of both the morphology and genetics of individual species, as well as a long list of characteristic features found to differentiate each from any previously known ones. However, the scientists argue, at this stage, it is impossible to pinpoint distinct morphological characters setting apart all currently known species from the numerous ones not yet encountered. To make matters worse, finding human and financial resources for performing this kind of detailed research is increasingly problematic.

This holds especially true when it comes to hyperdiverse groups, such as ichneumonoid parasitoid wasps: a group of tiny insects believed to comprise up to 1,000,000 species, of which only 44,000 were recognised as valid, according to 2016 data. In their role of parasitoids, these wasps have a key impact on ecosystem stability and diversity. Additionally, many species parasitise the larvae of commercially important pests, so understanding their diversity could help resolve essential issues in agriculture.

Meanwhile, providing a specific species-unique snippet of DNA alongside an image of the specimen used for the description of the species (i.e. holotype) could significantly accelerate the process. By providing a name for a species through a formal description, researchers would allow for their successors to easily build on their discoveries and eventually reach crucial scientific conclusions.

“If this style were to be adopted by a large portion of the taxonomic community, the mission of documenting Earth’s multicellular life could be accomplished in a few generations, provided these organisms are still here,”

say the authors of the study.

To exemplify their revolutionary approach, the scientists use their paper to also describe a total of 18 new species of wasps in two genera (Zelomorpha and Hemichoma) known from Área de Conservación Guanacaste, Costa Rica. Currently, the team works on the treatment of related species, which still comprise only a portion of the hundreds of thousands that remain unnamed.

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Original source:

Meierotto S, Sharkey MJ, Janzen DH, Hallwachs W, Hebert PDN, Chapman EG, Smith MA (2019) A revolutionary protocol to describe understudied hyperdiverse taxa and overcome the taxonomic impediment. Deutsche Entomologische Zeitschrift 66(2): 119-145. https://doi.org/10.3897/dez.66.34683

Field research in Turkmenistan’s highest mountain reveals high biological diversity

Camera trap image of male Markhor Capra falconeri at the Koytendag State Nature Reserve
Photo by Koytendag State Nature Reserve

New open-access book presents a comprehensive report on the remarkable ecosystems of the Koytendag nature reserve

Situated in the extreme south-east of Turkmenistan: on the border with Uzbekistan and close to the border with Afghanistan, Koytendag presents one of the most distinct landscapes in Central Asia. Reaching elevations of up to 3,137 m, this is also the highest mountain in Turkmenistan.

Location of Koytendag
Image by Atamyrat Veyisov

Koytendag State Nature Reserve and its three Wildlife Sanctuaries: Hojapil, Garlyk and Hojaburjybelent, were established between 1986 and 1990 to protect and preserve the mountain ecosystem of the Koytendag region and maintain the ecological balance between the environment and increasing economic activities.

Since 2013, a series of scientific expeditions and assessments were coordinated and funded by the Royal Society for the Protection of Birds (RSPB) to pave the way for the protection and preservation of the unique landscape and rare wildlife the site is recognised for.

As a result, the efforts of the conducted field studies of multidisciplinary international research teams are brought together in a comprehensive report, which is now openly available as an Advanced Book from the scientific publisher and technology provider Pensoft, edited by Geoff Welch (RSPB) and Prof. Pavel Stoev (National National Museum of Natural History of Bulgaria and Pensoft). Soon, the book will also be available in Russian.

The book is split into eight sections focused on different areas within the study of biodiversity: Flora, Surface dwelling invertebrates, Cave fauna, Fish, Amphibians, Reptiles, Birds and Mammals. An additional chapter is dedicated to the hydrogeology of the site because of its key role in supporting both the cave fauna and the local communities.

Entrance to the newly discovered record-breaking underground lake at the Koytendag State Nature Reserve
Photo by Mikhail Pereladov

In the summary of the report, the authors make a list of the most significant findings made during the research. These include the discovery of a cave hosting the largest underground lake in the whole North Eurasia (4,400 m2) and a total of 48 species of higher plants that can only be found in Koytendag. In terms of Koytendag’s surface-dwelling fauna, the report lists a number of species new to science: a scorpion (most likely yet unnamed species currently recognised as a species complex) and a spider. Meanwhile, a total of seven previously unknown species were found underground, including the very first exclusively subterranean animal found in the country: the insect-like ‘marvellous’ dipluran named Turkmenocampa mirabilis, and a strongly adapted to the underground waters of a desert sinkhole Gammarus troglomorphus. Additionally, the annual monitoring, conducted since 1995 by the reserve staff, report an encouraging increase in the populations of the rare markhors and mouflons. An intact predator-prey community was also identified as a result of observations of numerous Eurasian lynxes and grey wolves, as well as prey species.

Entrance of the cave Kaptarhana, (Lebap Province, Eastern Turkmenistan), where scientists discovered the first ever exclusively subterranean dweller for the country (find more here).
Photo by Aleksandr Degtyarev

Stephanie Ward, RSPB Central Asia Partner Development Officer, says:

“RSPB has been working in Turkmenistan under a Memorandum of Understanding with the Government since 2004. In that time we have had the privilege of working with a team of talented and dedicated national experts across the diverse and inspiring nature of this fascinating country. Our work in Koytendag has captured the attention and interest of many international scientists who hope that their contemporary biodiversity research will help to deepen the understanding and therefore ensure protection of the unique wonders of this mountain ecosystem. As a potential UNESCO World Heritage Site, we will continue to collaborate with the Turkmen people on the research and promotion of Koytendag State Nature Reserve.

Book editor and member of the research team Prof. Pavel Stoev adds:

“Koytendag Mountain is among the least explored and, simultaneously, one of the most biologically diverse regions in Central Asia. The rapid assessments of its flora and fauna revealed a high number of highly specialised species, all of which have undergone a long evolution to adapt to the harsh environments of the mountain. The establishment of Koytendag State Nature Reserve and the associated wildlife sanctuaries is a step in the right direction for the protection of this unique biota.”

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Cover of the book, available as an open-access Advanced book from: https://doi.org/10.3897/ab.e37858.

Original source:

Welch G, Stoev P (2019) A report of RSPB-supported scientific research at Koytendag State Nature Reserve, East Turkmenistan. Advanced Books. https://doi.org/10.3897/ab.e37858

Additional information:

This work was carried out under the Memorandum of Understanding between the Ministry of Agriculture and Environment Protection of Turkmenistan and the RSPB, within the Project on “Improvement of the status of birds and other biodiversity in Turkmenistan”.

About Koytendag State Nature Reserve:

Koytendag State Nature Reserve was established in 1986 to protect and preserve the mountain ecosystem of the Koytendag region and maintain the ecological balance between the environment and the increasing anthropogenic activities. Of particular importance was the protection of rare species, such as the markhor; important habitats, including pistachio and juniper forests; and the impressive dinosaur trackways at Hojapil.

Advanced Books publishing by Pensoft:

Launched by Pensoft and powered by the scholarly publishing platform ARPHA, the Advanced Books approach aims to issue new books or re-issue books previously only available in print or PDF. In the Advanced Books format, the publications are semantically enhanced and available in HTML and XML as well, in order to accelerate open access, data publication, mining, sharing and reuse. The Advanced books builds on the novel approaches developed by the Pensoft’s journals.



Be prepared: Prioritising invasive species for strategic prevention in Durban, South Africa

Durban Harbour, used for both commercial and recreational purposes, is an important hub of human activity. The harbour was found to be an important point of first introduction as well as a site for naturalisation for the three species highlighted in this study.
(Photos by Şerban Procheş /left/ and Carl Munsamy /right/)

While exploring the way alien species invade cities around the world, South African PhD student Ashlyn L. Padayachee (University of KwaZulu-Natal, UKZN) and her supervisors, Serban Proches (UKZN) and John Wilson (SANBI and Stellenbosch University) remember suddenly being stricken.

What they realised was that while cities were gradually starting to prepare for climate change, their responses to invasions were rather reactive. Even though management focused on widespread invasive species, which were currently having the most negative impacts on native biodiversity, the researchers noted that if those decision makers had only targeted the next highly damaging invaders ahead of their arrival, the associated costs would have greatly decreased.

Consequently, the team developed a methodology, based on three key aspects: priority species, points of first introduction and sites of naturalisation, in order to identify the most probable and concerning invasive species for Durban (eThekwini in KwaZulu Natal), a coastal city in South Africa. Furthermore, their work, published in the open-access journal Neobiota provides decision makers from around the world with a new tool, that is easy to use and adjustable to the specificity of different cities.

Firstly, the researchers identified cities with a similar climate to Durban and used existing alien species watch lists, environmental criteria and introduction pathways to identify species, which are not present in South Africa, but are considered of unacceptable risk of invasion. The team continued by figuring out which of those selected species are likely to have pathways facilitating their introduction to the city and developed a climatic suitability model for each. Finally, the scientists linked the climate and pathway information, so that they could identify sites within Durban to be considered as a focus for the contingency planning for particular species.

As a result, the authors identified three alien species as priorities for Durban: Alligator weed (Alternanthera philoxeroides), American bullfrog (Lithobates catesbeianus) and the red imported fire ant (Solenopsis invicta).


River systems are ideal habitats for Alligator weed. River systems adjacent to points of first introduction were identified as important sites of first naturalisation of this species.
(Photo by Şerban Procheş)

In terms of points of introductions, the data highlighted the Durban Harbour, especially for the red imported fire ant. Plant nurseries and garden centres, as well as pet and aquarium shops were also identified as important sites for the three studied species. Additionally, suitable habitats located near the points of introduction, such as river systems and built infrastructure, were found in need of monitoring.


The red imported fire ant is usually found in close proximity to human dwellings, which provide ideal habitats for this species. Built infrastructure, especially those adjacent to the Durban Harbour, was identified as an important site of its naturalisation.
(Photo by Şerban Procheş)

In conclusion, the implementation of prioritisation schemes to consider the three aspects (species, pathways, and sites) allows managers to focus resources on those species which pose a greater risk of invasion and impact.

“This will only ever be one part of a broad range of biosecurity efforts, but it is one where, we believe, we can be prepared,” comment the authors.

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Original source:

Padayachee AL, Proches S, Wilson JRU (2019) Prioritising potential incursions for contingency planning: pathways, species, and sites in Durban (eThekwini), South Africa as an example. NeoBiota 47: 1-21. https://doi.org/10.3897/neobiota.47.31959

Australian study into how seals react to boats prompts new ecotourism regulations

Australian fur seals alert to the presence of the potential danger. Photo: Julia Back

Unable to differentiate between a predator and a tourist boat carrying humans curious to view a colony of seals while resting in their natural habitat, pinnipeds are quick to react defensively as soon as they sense what they perceive as a potential life threat. The closer the vessel approaches, the more likely it is for the animals to rush into the sea in an attempt to escape and the greater the risk of injury and even death in the event of a stampede, or predation once they are in the water. In fact, just the act of remaining alert comes at potentially high energetic costs for the animals.

“Although the purpose of ecotourism is to give patrons the opportunity to observe animals in the wild engaging in typical behaviors, ecotourism-based human interactions may instead alter pinniped behavior by initiating responses indicative of predation avoidance,” explain the scientists.
“The periods fur seals spend ashore at colonies are particularly important for resting, evading predators, molting, breeding and rearing young. Fleeing behaviors in themselves expend energy, and time spent in the water as a result of flight responses can also be energetically costly,” they add.

Australian fur seals begin to flee into the water as a boat approaches Kanowna Island. Photo: Julia Back

To provide recommendations for appropriately informed management guidelines, so that ecotourism does not clashes with the animals’ welfare, the Australian research team of Julia Back and Prof John Arnould of Deakin University, Dr Andrew Hoskins, CSIRO, and Dr Roger Kirkwood, Phillip Island Nature Park, observed the response to approaching boats of a breeding colony of Australian fur seals on Kanowna Island in northern Bass Strait, southeastern Australia. Their study is published in the open-access journal Nature Conservation.

A female Australian fur seal calling for her pup.  Photo: Andrew Hoskins

Whenever a seal detects a threat while onshore, they first change posture, watch the object and remain alert and vigilant until the danger is gone. In the field survey, such a response was triggered when the research boat approached the colony at a distance of 75 m. Interestingly, this reaction would be more pronounced in the morning (the researchers would normally visit the colony twice a day), while in the afternoon the seals would demonstrate a reduced response. Why this is so, remains unclear.

When there was only 25 m between the seals and the boat, the scientists observed many of the animals fleeing to the safety of the water. This kind of reaction is particularly dangerous for the seals and especially their young, as these animals tend to perceive risk based on the responses of the individuals around them. In such a cascading response, a large-scale stampede is likely to occur, where pups could easily get trampled to death or fall from cliffs.

“While the infrequency of these events suggests they are unlikely to have population-level effects, such disturbance impacts are in violation of state and federal regulations protecting marine mammals”, note the authors, citing the International Union for Conservation of Nature.

As a result of the study, the management guidelines were updated, so that they currently restrict boat approaches to 100 m at Kanowna Island from March through October, when the rearing of the pups takes place. During the breeding period, vessels need to keep a distance of at least 200 m, as previously.

In conclusion, the authors also note that their findings are limited to a single colony and are therefore insufficient to make any generalisations about other species or even other Australian fur seal populations.

Australian fur seals begin to flee into the water as a boat approaches Kanowna Island. Photo: Julia Back

 

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Original source:

Back JJ, Hoskins AJ, Kirkwood R, Arnould JPY (2018) Behavioral responses of Australian fur seals to boat approaches at a breeding colony. Nature Conservation 31: 35-52. https://doi.org/10.3897/natureconservation.31.26263