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Some introduced (i.e. non-native) plants become abundant, threaten species richness and the well-functioning of ecosystems, the economy, or health (plant invasion). Environmental policies that attempt to restrict the expansion of non-native species are based on a consensus among scientific experts that invasions are a serious environmental problem. An example of a problematic non-native species in many parts of the world is Fallopia japonica, the Japanese knotweed that negatively affects river ecosystems.

A consensus among experts on the severity of plant invasions seems evident in many scientific and outreach publications. However, instead of consensus, a new study by an interdisciplinary research team at ETH Zurich (Switzerland) of psychologists and plant biologists found a wide range of different opinions among scientific experts about how to describe invasive plant species, and how severe their effects on the environment are. The study is published in the latest issue of the open access journal NeoBiota.

The researchers conducted 26 face-to-face interviews with a representative sample of German-speaking scientists working on plant invasions, or more generally on environmental change, in Europe. The interviews revealed that individual understandings of scientific concepts, uncertainties, and value-based attitudes towards invasive plants and their management diverged widely among these experts.

“Particularly, ambiguous definitions of the terms non-native and invasive (two key notions in invasion science) are a strong source of misunderstandings among scientists.” said lead author Franziska Humair, a doctoral student at ETH Zurich. Some of the study participants used a biological definition to discriminate native from non-native species (“species from a different biogeographic region”), while others referred to culture (“species not familiar to local people”). “Based on each definition, a different set of species is considered non-native in a particular country.” Ms Humair said. Equally, different experts considered different impacts by invasive species on ecosystems and their functioning for humans (ecosystem services) to be relevant. “These ambiguous interpretations of key notions and divergent assessments of impacts may then lead to conflicting risk assessments and pronounced misunderstandings, eventually impeding concerted management action.” concluded Ms Humair.

The authors propose that invasive species management would strongly profit from broader participation of different expert groups and stakeholders in invasive species research and management, making scientific uncertainties as well as diverging opinions towards management goals transparent.

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Original source:

Humair F, Edwards PJ, Siegrist M, Kueffer C (2014) Understanding misunderstandings in invasion science: why experts don’t agree on common concepts and risk assessments. NeoBiota 20: 1. doi: 10.3897/NeoBiota.20.6043

Saccharum spontaneum is an invasive grass that has spread extensively in disturbed areas throughout the Panama Canal watershed, where it has created a fire hazard and inhibited reforestation efforts. The weed originally believed to be originally from India, is perfectly adapted to the conditions in Panama and produces excessive amounts of biomass during the wet season, which impedes reforestation efforts. A new study published in the open access journal NeoBiota proposes an effective method for controlling the growth, based on analysis of its reproductive biology.

Currently physical removal of aboveground biomass is the primary means of controlling the weed, which is largely ineffective and does little to inhibit spread of the species. This is due to the insufficient knowledge about reproduction of the species and this is where science comes to the rescue.

A team of scientists from Australia and Panama provide a detailed examination of a series of studies looking at some of the basic reproductive mechanisms and strategies utilised by S. spontaneum to provide information to support development of better targeted management strategies.

It turns out that S. spontaneum has a very good survival toolkit being able to reproduce through buds on stems that had been dried for up to six weeks. Separate experiments showed that even leftover stem fragments could sprout when left on the surface or buried shallowly and that larger pieces sprouted more readily than smaller pieces.

The study shows that the through better knowledge the panacea of a big problem can turn out to be very simple. A good timing of management actions to prevent flowering would significantly reduce the seed load into the environment and help to prevent spread to new sites. Similarly simple but effective would be cutting stems into smaller pieces allowing them to dry out and reduce the ability of buds to sprout.

Original Source:

Bonnett GD, Kushner JNS, Saltonstall K (2014) The reproductive biology of Saccharum spontaneum L.: implications for management of this invasive weed in Panama. NeoBiota 20: 61. doi: 10.3897/neobiota.20.6163

A team of scientists from the Natural History Museum of Los Angeles and the University of California at Davis describe ten new species of Temnothorax ants, doubling the number of species of this genus in California. What makes this discovery even more special is that each described specimen is linked to the AntWeb database by a unique identifier. Publishing this way makes it easier to harvest the data by other on-line resources and repositories.

The era of electronic publishing in taxonomy has greatly facilitated the accessibility of specimen data. ZooKeys, where the new study is published, has been long spearheading the goal of wide and rapid dissemination of taxonomic information and a new publication in this journal is further taking the advantage of electronic media.

As is customary in taxonomic descriptions, the authors are providing a list of material examined for each species. Each of the specimen records is marked by a unique specimen identifier, a number that links to a record page in the AntWeb database. This data is also supplied as a supplementary text file, making it easy for the readers to access, download, and analyze these records. The presence of this information in an external database allows harvesting by other on-line resources, such as Encyclopedia of Life, Global Biodiversity Information Facility (GBIF), Species-ID and ZooBank.

AntWeb is an online ant database that focuses on specimen level data and images linked to specimens. In addition, contributors can submit natural history information and field images that are linked directly to taxonomic names. Distribution maps and field guides are generated automatically. All data in AntWeb are downloadable by users.

“We include 20 species known from California in our study but at present, there are about 60 species (including those described below) of Temnothorax known from North America and more than 350 species worldwide so our study is of somewhat limited scope.”, explain the authors. “Nevertheless, we believe that by officially describing these forms and giving a new illustrated key, we are providing a useful resource for myrmecologists working in western North America.”

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Original Source:

Snelling RR, Borowiec ML, Prebus MM (2014) Studies on California ants: a review of the genus Temnothorax (Hymenoptera, Formicidae). ZooKeys 372: 27. doi:10.3897/zookeys.372.6039

Ecosystem functioning, or the role which organisms play in an ecosystem, is becoming increasingly important in marine ecological and conservation. To facilitate such studies an international team of scientists lead by S. Faulwetter from the Hellenic Centrefor Marine Research(HMRC) present the Polytraits database that aims to provide re-usable, and accessible data on marine bristle worms. The paper describing the new database was published in the innovative Biodiversity Data Journal, a pioneer in the publication of integrated biological data.

Benthic organisms participate in a number of biological processes in world water basins. Their functional diversity is an important community property demonstrating the role organisms have in the ecosystem and helping to understand how the community reacts to environmental changes. Polychaetes, or bristle worms, are marine worms famous for their peculiar shapes and often vivid coloration. More than 10,000 species are described in the class worldwide, most of which living in the shelf zone of the seas and oceans, burrowing in the sediment or swimming among the plankton.

At present, the Polytraits database contains almost 20,000 records on morphological, behavioural and reproductive characteristics of more than 1,000 species, all referenced by literature sources. All data on these engaging organisms can be freely accessed through the project website in different ways and formats, both human-readable and machine-readable. The new database presents a rich and easy to use collection, which cover morphological, reproductive and behavioural characteristics of polychaetes, as well as information on environmental preferences in an attempt to facilitate ecological research and conservation studies.

The researchers also provide a leading-edge approach to accessing, integrating and re-using the data. Through programming interfaces, the life-cycle information is automatically integrated into the Polychaetes Scratchpads, together with other data on polychaetes. Scratchpads are easy to use, adaptable, and provide powerful tools for managing biodiversity data. This taxon-centric virtual research environment allows browsing the taxonomic classification and retrieving various kinds of relevant information for each taxon, among which are also the collected biological traits.

Furthermore, the data are also accessible through Encyclopedia of Life’s TraitBank which currently features over 3 million records related to more than 250 attributes for 272,720 taxa, including the Polytraits data. TraitBank serves as a provider for aggregated species trait data. All data uploaded there are archived and integrated with trait information from other sources to address issues of standardization of scientific data. This is the first complex database for marine organisms to be published in such an innovative way and demonstrates yet another example of collaboration between the data publisher Pensoft and Encyclopedia of Life.

 

Original Source:

Faulwetter S, Markantonatou V, Pavloudi C, Papageorgiou N, Keklikoglou K, Chatzinikolaou E, Pafilis E, Pafilis E, Chatzigeorgiou G, Vasileiadou K, Dailianis T, Fanini L, Koulouri P, Arvanitidis C (2014) Polytraits: A database on biological traits of marine polychaetes. Biodiversity Data Journal 2: e1024. DOI: 10.3897/BDJ.2.e1024

 

Additional information:

Polytraits is a database on biological traits of polychaetes (bristle worms, Polychaeta: Annelida). It covers information about morphological, behavioural, reproductive and larval characteristics of polychaete taxa which has been collected from the literature. The project was initially started as an in-house project of the Institute of Marine Biology, Biotechnology and Aquaculture of the Hellenic Centre for Marine Research.

TraitBank is a searchable, comprehensive, open digital repository for organism traits, measurements, interactions and other facts for all taxa across the tree of life designed and introduced by the Encyclopedia of Life (EOL). TraitBank features over 3 million records related to more than 250 attributes for 272,720 taxa obtained from more than 25 data sources and its release has just been formally announced.

The Biodiversity Data Journal (BDJ) and the associated Pensoft Writing Tool (PWT), launched on 16th of September 2013, offer several innovations – some of them unique – at every stage of the publishing process. The workflow allows for authoring, peer-review and dissemination to take place within the same online, collaborative platform.

 

 

A visit to the Natural History Museum, London, yielded an unexpected surprise for Dr. Joseph Parker, a UK biologist based in New York at Columbia University and the American Museum of Natural History.

Among the 22,000 drawers of specimens that comprise the Coleoptera (beetle) collection housed in the Department of Entomology, was a new rove beetle genus collected during the 1990s in Manaus, a region of the Brazilian Amazon. The new genus is described in the open access journal ZooKeys.

The beetles, which measure only 3 mm in length, have a remarkable sexual dimorphism: the male has large eyes with over one hundred eye facets, whereas the female eyes have a paltry 12 facets. The male also has large flight wings, while the female has no wings at all. It’s likely that the male does most of the searching for mates, while the female doesn’t develop large eyes or wings and invests instead in egg production.

The beetles belong to a group of rove beetles called Pselaphinae, a “massive group of tiny beetles, amongst the commonest beetles you can find in rainforest leaf litter” according to Parker, a Pselaphinae specialist. “We know of more than 9,000 species of these beetles—that’s about as many species as there are birds. The big differences are that only about six or seven people worldwide work on these beetles, and unlike birds, many thousands more of these beetles await discovery, and unfortunately almost nothing is known about their ecology.”

Parker, who is also a developmental biologist, named the new genus “Morphogenia” after “morphogens”—a kind of signalling molecule that functions during animal development to control the size, shape and form of organs.

The beetles were found at the Biological Dynamics of Forest Fragments Project. This vast ecological experiment was set up by the Smithsonian Institution and Brazil’s National Institute for Amazonian Research (INPA) to investigate how forest fragmentation affects communities of plants and animals.

“With so few people working on groups of organisms like this, it’s hard to know what role they play in nature. The fact there’s so many species, and they’re so abundant, suggests they’re doing something important.” added Parker.

Original source:

Parker J (2014) Morphogenia: a new genus of the Neotropical tribe Jubini (Coleoptera, Staphylinidae, Pselaphinae) from the Brazilian Amazon. ZooKeys 373: 57–66. doi: 10.3897/zookeys.373.6788

 

Additional Information:

http://www.nature.com/news/forest-ecology-splinters-of-the-amazon-1.12816

A new species of toad was discovered hiding in the leaf litter of the Peruvian Yungas. The word is used widely by the locals to describe ecoregion of montane rainforests, and translates as “warm valley” in English. The new species Rhinella yunga was baptized after its habitat preference. The study was published in the open access journal ZooKeys.

Like many other toads of the family Bufonidae the new species Rhinella yunga has a cryptic body coloration resembling the decaying leaves in the forest floor (“dead-leaf pattern”), which is in combination with expanded cranial crests and bony protrusions cleverly securing perfect camouflage. The different colors and shapes within the same species group however make the traditional morphological methods of taxonomic research hard to use to identify the real species diversity within the family. Nevertheless, Rhinela yunga is distinct from all related species in absence of a tympanic membrane, a round membranous part of hearing organ being normally visible on both sides of a toad’s head.

“It appears that large number of still unnamed cryptic species remains hidden under some nominal species of the Rhinella margaritifera species group.”, explains Dr Jiří Moravec, National Museum Prague, Czech Republic.

Among the other interesting characteristics of the true toads from the family Bufonidae are a typical warty, robust body and a pair of large poison parotoid glands on the back of their heads. The poison is excreted by the toads when stressed as a protective mechanism. Some toads, like the cane toad Rhinella marina, are more toxic than others. Male toads also possess a special organ, which after removing of testes becomes an active ovary and the toad, in effect, becomes female.

Original Source:

Moravec J, Lehr E, Cusi JC, Córdova JH, Gvoždík V (2014) A new species of the Rhinella margaritifera species group (Anura, Bufonidae) from the montane forest of the Selva Central, Peru. ZooKeys 371: 35. doi: 10.3897/zookeys.371.6580

Amazonian biodiversity has been studied for hundreds of years. Early explorers of Amazonian plants and animals included renowned naturalists of the stature of Alexander von Humboldt and A. R. Wallace. Despite this long history of exploration, new studies are resulting in the discovery of a large number of new species. The key of these discoveries lies in the use of advanced new tools for species detection.

The study, published in the open access journal ZooKeys, found up to 11 species among populations of what were previously considered two widespread treefrog species. Based on analyses of the genetic variation of dozens of Amazonian populations across six countries, the team lead by Marcel Caminer from the Museum of Zoology at Catholic University of Ecuador, found unequivocal evidence of the existence of a large amount of the so called “cryptic diversity“. The genetic results were corroborated with detailed analyses of male calls and body shape and color. The study formally describes four of the new species identified.

”These findings could not be possible without large-scale genetic sampling.” said Dr Santiago Ron, one of the authors of the study. ”The genetic data allows the discovery of species that have been hidden in museum shelves for decades. Genetic screening is opening a new age of scientific discovery in biodiversity studies in the Amazon region.”

“Cryptic species” are two or more species mistakenly classified as a single one. Traditionally, taxonomists recognized species purely on morphological grounds and therefore failed to discriminate between species with similar appearance. The increasing use of DNA sequences for species recognition is demonstrating that current estimates vastly underestimate the true Amazonian species richness.

The discovery of cryptic diversity also has important implications for the conservation prospects of the species. ”What were considered two species with wide geographic distribution turned out to be eleven species with much smaller geographic ranges. This change implies that each species has a higher extinction probability.” said Dr. Ron. ”If our results are typical of Amazonian amphibians, a large scale reassessment of their conservation status and geographic distribution will be required.”

Original Source:

Caminer MA, Ron SR (2014) Systematics of treefrogs of the Hypsiboas calcaratus and Hypsiboas fasciatus species complex (Anura, Hylidae) with the description of four new species. ZooKeys 370: 1. doi: 10.3897/zookeys.370.6291

A group of scientists from the University of Mainz and the Senckenberg Museum of Natural History Goerlitz, headed by Susanne Foitzik and Bernhard Seifert, recently described a new slave-making ant species from the eastern USA. They baptized the new ant Temnothorax pilagens – from pilere (Latin): to pluck, plunder or pillage. The paper was published in the open access journal ZooKeys.

In contrast to the famous slave-hunting Amazon Ants whose campaigns may include up to 3000 warriors, the new slave-maker is minimalistic in expense, but most effective in result. The length of a “Pillage Ant” is only two and a half millimeters and the range of action of these slave-hunters restricts to a few square meters of forest floor. Targets of their raiding parties are societies of two related ant species living within hollow nuts or acorns. These homes are castles in the true sense of the word – characterized by thick walls and a single entrance hole of only 1 millimeter in diameter, they cannot be entered by any larger enemy ant.

An average raiding party of the Pillage Ant contains four slave-hunters only, including the scout who had discovered the target. Due to their small size the raiders easily penetrate the slave species home. A complete success of raiding is achieved by a combination of two methods: chemical camouflage and artistic rapier fencing.

The observed behavior is surprising as invasion of alien ants in an ant nest often results in fierce, usually mortal, fighting. Here, however, in several observed raids of the Pillage Ant, the attacked ants did not defend and allowed the robbers to freely carry away broods and even adult ants to integrate them into the slave workforce. The attacked ants did not show aggression and defence because the recognition of the enemy was prevented by specific neutralizing chemical components on the cuticle of the slave-hunters.

The survival of slave ant nests is an ideal solution from the perspective of slave hunters as it provides the chance for further raids during the next years. In other observed raids chemical camouflage was less effective – perhaps because the attacked ant population was strongly imprinted to a more specific blend of surface chemicals. In fact, a defence reaction was more probable if the attacked colony contained a queen that causes a strong imprinting of chemical recognition cues.

If defending, the chance of a slave ant to win a fight with a  Pillage Ant is nearly zero. The attackers use their stinger in a sophisticated way, targeting it is precisely in the tiny spot where the slave ant’s neck is soft-skinned. This stinging causes immediate paralysis and quick death and may result in high rates of casualties ranging from 5% to 100% of the attacked nests’ population, whereas there are no victims among the attackers. If the Pillage Ants can conduct such successful raids with no or minimum own losses, there remains the question which factors regulate their population at a rather low level.

Original Source:

Seifert B, Kleeberg I, Feldmeyer B, Pamminger T, Jongepier E, Foitzik S (2014) Temnothorax pilagens sp. n. – a new slave-making species of the tribe Formicoxenini from North America (Hymenoptera, Formicidae). ZooKeys 368: 65. doi: 10.3897/zookeys.368.6423

DNA barcoding is used as an effective tool for both the identification of known species and the discovery of new ones. The core idea of DNA barcoding is based on the fact that just a small portion of a single gene already can show that there is less variation between the individuals of one species than between those of several species.

Thus, when comparing two barcode sequences one can establish whether these belong to one single species (viz. when the amount of variation falls within the ‘normal’ range of the taxon under consideration and below a certain threshold level) or possibly to two species (when the amount exceeds this level).

A recent study in the open access journal ZooKeys sequenced 388 individuals of 147 bird species from The Netherlands. 95% of these species were represented by a unique barcode, but with six species of gulls and skuas having at least one shared barcode. This is best explained by these species representing recent radiations with ongoing hybridization. In contrast, one species, the Western Lesser Whitethroat showed deep divergences between individuals, suggesting that they possibly represent two distinct taxa, the Western and the Northeastern Lesser Whitethroat.

Our study adds to a growing body of DNA barcodes that have become available for birds, and shows that a DNA barcoding approach enables to identify known Dutch bird species with a very high resolution. In addition, some species were flagged up for further detailed taxonomic investigation, illustrating that even in ornithologically well-known areas such as the Netherlands, more is to be learned about the birds that are present.

“The barcoding approach is particularly useful in musea.”, comments Dr. Aliabadian, Ferdowsi University of Mashhad, Iran, “This illustrates the value of DNA tissue vouchers ‘ready for use’ from the bird collection of the Naturalis Biodiversity Center in Leiden.”

Original source:

Aliabadian M, Beentjes KK, Roselaar CS, van Brandwijk H, Nijman V, Vonk R (2013) DNA barcoding of Dutch birds. In: Nagy ZT, Backeljau T, De Meyer M, Jordaens K (Eds) DNA barcoding: a practical tool for fundamental and applied biodiversity research. ZooKeys 365: 25–48. doi: 10.3897/zookeys.365.6287

Marine mammals are flagship and charismatic species, very attractive for the general public. Nowadays, they are also considered as highly relevant sentinel of the marine realm. Their presence and their welfare in an area is thought to indicate the health of the place, whereas their disappearance, their displacement, or a decrease in their abundance or health could reflect negative environmental changes, whether of anthropogenic origin or not.

Monitoring marine mammal biodiversity is often difficult to perform. If some species can be easily observed, others are more difficult to detect, because for instance, of their scarcity or their discrete behavior. One of the solution suggested by scientists is based on the organization of stranding networks, listing and recording marine mammal strandings, which represent a cost-effective means to follow the marine mammal biodiversity.

Researchers from Océanopolis and from the Laboratory BioGeMME (Biologie et Génétique des Mammifères Marins dans leur Environnement) of the University of Brest, in collaboration with the Parc naturel marin d’Iroise and PELAGIS, have evaluated the usefulness of DNA barcoding in the monitoring of marine mammal biodiversity. They confirmed the species identifications performed by field correspondents, identified degraded carcasses or parts of carcasses, and examined intraspecific genetic variations for the harbour porpoise and the grey seal, undetectable by visual observation.

The conclusions of their study, published in a special issue of the open access journal Zookeys dedicated to DNA barcoding (DNA barcoding: a practical tool for fundamental and applied biodiversity research), are that the use of DNA barcoding in conjunction with a stranding network will clearly increase the accuracy of the monitoring of marine mammal biodiversity. Global climate change, as well as more localized environmental changes (some of which are caused by humans), has impacts on the marine realm. A routine use of DNA barcoding to monitor marine mammal biodiversity will clearly increase our capacity to detect such impacts, which is a necessary first step to take appropriate conservation measures.

In France, the French marine mammal stranding recording program has been created at the beginning of the 70s by the CRMM (Centre de Recherche sur les Mammifères Marins, La Rochelle, presently the Joint Service Unit PELAGIS, UMS 3462, University of La Rochelle- CNRS). The network comprises about 260 field correspondents, members of organizations or volunteers (Peltier et al. 2013, PloS One, e62180).

In Brittany (a region located at the northwest of France), the network is coordinated by Océanopolis in Brest. In this area, and all species included, an average of 150 animals strand each year, representing, in the last ten years, 14 species of cetaceans and five species of pinnipeds. These species include for instance, common and bottlenose dolphins, harbour porpoises, but also larger animals like minke whales and fin whales. Some rare stranding events include deep-diving or exotic species, such as arctic seals.

Original source:

Alfonsi E, Méheust E, Fuchs S, Carpentier F-G, Quillivic Y, Viricel A, Hassani S, Jung J-L (2013) The use of DNA barcoding to monitor the marine mammal biodiversity along the French Atlantic coast. In: Nagy ZT, Backeljau T, De Meyer M, Jordaens K (Eds) DNA barcoding: a practical tool for fundamental and applied biodiversity research. ZooKeys 365: 5–24. doi:10.3897/zookeys.365.5873