habitat degradation

Insights into the biodiversity of annelids in the world’s largest deep-sea mineral exploration region

This study, published in Biodiversity Data Journal, is an important step in creating field guides for CCZ wildlife, which will help promote sustainable practices and informed decision-making.

The demand for rare raw materials, such as cobalt, is fuelling the exploration of the deep-sea floor for mining. Commercial deep-sea mining is currently prohibited in areas beyond national jurisdiction, but companies are permitted exploratory operations in certain areas to assess their mineral wealth and measure environmental baselines. The Clarion-Clipperton Zone (CCZ) is an area of the Pacific deep-sea floor spanning up to 6 million km², found roughly between Hawaii and Mexico. Currently, it has 17 contracts for mineral exploration covering 1.2 million km². However, despite relatively extensive mineral exploration beginning in the 1960’s, baseline biodiversity knowledge of the region is still severely lacking. Even the most basic scientific question: “What lives there?” has not been fully answered yet.

Annelids found in the Clarion-Clipperton Zone.

In a new paper researchers report on the marine life of the CCZ, focusing on annelid worms. Annelids represent one of the largest group of macroinvertebrates living within the mud covering the sea floor of CCZ, both in terms of number of individuals and the number of species. Data from recent oceanographic cruises enabled researchers from the University of Gothenburg, Sweden and the Natural History Museum London to discover more than 300 species of annelids from around 5000 records. The annelid species, many considered to be new to science, were discovered through employment of traditional morphological approaches and modern molecular techniques. The current study focuses on 129 such species across 22 annelid families. Previously, the authors of this study formalized 18 new species, while altogether reporting on 60 CCZ species, including most recently 6 species in family Lumbrineridae. The lead author Helena Wiklund from University of Gothenburg comments: ‘Taxonomy is the most important knowledge gap we have when studying these unique habitats and the potential impact of mining operations. We need to know what lives there to inform the protection of these ecosystems.”

To further understand the CCZ, scientists sail the Pacific Ocean on research expeditions that employ sampling techniques ranging from the technical, like remote-controlled vehicles that traverse the ocean floor, to the simple, like a sturdy box corer collecting sediment at the bottom.

“Sadly, the soft-bodied annelids are often damaged during the collection and sediment sieving onboard” says annelid taxonomist Lenka Neal from the Natural History Museum London. As a result, the traditional morphological approach is often of limited use when working with the deep-sea specimens, with taxonomists increasingly employing DNA techniques as well.

Over the last decade, scientists have generated a large amount of annelid data. Such data are only of use when made available through publication to the wider scientific community and other stakeholders. “A priority is to make the data are FAIR, or Findable, Accessible, Interoperable and Reusable so it can be redeployed easily, if you’ll excuse the pun, for future analysis” says co-author Muriel Rabone. “The same applies to samples, where accessibility of the specimen vouchers and molecular samples allows for reproducibility and continuation of the work. This is one step of the process. And ultimately, having more robust knowledge can lead to more robust evidence-based environmental policy”.

“More often than not, ecological papers describing biodiversity do not include a list of all the species and specimens used to make the broader ecological inferences, and even more rarely make the specimens and all associated metadata available in a FAIR way. In this study, we have made a significant and time-consuming attempt to do this, in a region of the global oceans where critical policy decisions are being made that could impact the way humanity obtains its resources and manages its environment in a sustainable way,” the researchers write in their paper, which was published in the open-access Biodiversity Data Journal.

The team behind the research hope that this still partial checklist of CCZ annelids, many in too poor state of preservation to be immediately described, is a key step forward towards creating future field guides for the area’s wildlife. Given that mining operations in the area could be imminent with the International Seabed Authority considering applications this year, the use of biological data for environmental management has become more important than ever.

This research was supported by funding from UK Seabed Resources Ltd.

Research article:

Wiklund H, Rabone M, Glover AG, Bribiesca-Contreras G, Drennan R, Stewart ECD, Boolukos CM, King LD, Sherlock E, Smith CR, Dahlgren TG, Neal L (2023) Checklist of newly-vouchered annelid taxa from the Clarion-Clipperton Zone, central Pacific Ocean, based on morphology and genetic delimitation. Biodiversity Data Journal 11: e86921. https://doi.org/10.3897/BDJ.11.e86921

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Homo sapiens or insapiens? A new insect species from Kosovo cries for help

A new insect species from Kosovo challenges the idea of the intelligence and cleverness of humankind, compared to other organisms, with its scientific name.

Type locality of the new species. Photo by Halil Ibrahimi

Lying at the center of the Balkan Peninsula, Kosovo harbors a diversity of ecosystems and conditions, which have favored processes leading to the existence of many endemic and rare species. In the past few years, several new species of aquatic insects have been discovered from the small Balkan country, making it unique in terms of biodiversity. Unfortunately, as elsewhere in the Balkans, many of these ecosystems have deteriorated heavily.

A team of scientists from Kosovo, led by Professor Halil Ibrahimi of the University of Prishtina, recently found a new species of aquatic insect, a caddisfly, from the Sharr Mountains in Kosovo, and named it Potamophylax humoinsapiens.

The species epithet humoinsapiens is a combination of two Latin words, “humo”, which in English means “to cover with soil, to bury,” and “insapiens,” meaning “unwise”. The researchers explain this name refers to the unwise and careless treatment of the habitats of the new species: hydropower plant, illegal logging and pollution have greatly degraded the area in the past years. “In some segments, whole parts of the Lepenc River are “buried” in large pipes,” they write in their study, which was published in the open-access Biodiversity Data Journal.

*Potamophylax humoinsapiens*. Photo by Halil Ibrahimi

“The species name ‘humoinsapiens’ ironically sounds like Homo insapiens, and this new species is right in calling us unwise,” thinks Prof. Ibrahimi. “With its actions, humankind has caused the extinction of many species of insects and other organisms during the past decades and has degraded greatly all known ecosystems in the planet. The debate on questioning wise nature of humans is already ongoing.

In the past few years, Professor Halil Ibrahimi and his team have found several new species of aquatic insects from the Balkans, Middle East and North Africa. In an attempt to raise awareness for this group of vulnerable creatures, endangered greatly by human activities, the team of scientists has given their species unique names. One of their previous discoveries was named Potamophylax coronavirus in order to raise the attention to the silent and dangerous “pandemic” humans have caused in freshwater ecosystems in the Balkans.

The research team behind the discovery. Photo by Halil Ibrahimi

“By combining classical taxonomy and modern molecular analysis techniques with the unique names, we are making insect species talk to our collective consciousness. It is in humankind’s capacity to earn the name Homo sapiens again,” the researchers conclude.

The study was financed by the Ministry of Education, Science, Technology and Information of the Republic of Kosovo and was conducted in the Laboratory of Zoology-Department of Biology of the University of Prishtina.

Original source:

Ibrahimi H, Bilalli A, Gashi A, Grapci Kotori L, Slavevska Stamenkovič V, Geci D (2023) Potamophylax humoinsapiens sp. n. (Trichoptera, Limnephilidae), a new species from the Sharr Mountains, Republic of Kosovo. Biodiversity Data Journal 11: e97969. https://doi.org/10.3897/BDJ.11.e97969

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Bee diversity and richness decline as anthropogenic activity increases, confirm scientists

The researchers compared wild bee communities in the tropical dry forest of Mexico living in three habitat conditions: preserved vegetation, agricultural sites and urbanised areas

Changes in land use negatively affect bee species richness and diversity, and cause major shifts in species composition, reports a recent study of native wild bees, conducted at the Sierra de Quila Flora and Fauna Protection Area and its influence zone in Mexico.

Having registered a total of 14,054 individual bees representing 160 species, 52 genera, and five families over the span of a year, the scientists conclude that the studied preserved areas demonstrated “significantly greater” richness and diversity.

In their paper, published in the open-access Journal of Hymenoptera Research, a research team from the University of Guadalajara, Mexico, led by Alejandro Muñoz-Urias, compare three conditions within the tropical dry forest study site: preserved vegetation, an agricultural area with crops and livestock, and an urbanised area.

This bee species (*Aztecanthidium xochipillium*) is known exclusively from Mexico.

The researchers confirm earlier information that an increase in anthropogenic disturbances leads to a decrease in bee richness and diversity. While availability of food and nesting sites are the key factors for bee communities, changes in land use negatively impact flower richness and floral diversity. Thereby, turning habitats into urbanised or agricultural sites significantly diminishes the populations of the bees which rely on specific plants for nectar and pollen. These are the species whose populations are threatened with severe declines up to the point of local extinction.

According to their data, about half of the bees recorded were Western honey bees (49.9%), whereas polyester bees turned out to be the least abundant (1.2 %).

On the other hand, some generalist bees, which feed on a wide range of plants, seem to thrive in urbanised areas, as they take advantage of people watering wild and ornamental plants at times where draughts might be eradicating native vegetation.

“That is the reason why bees that can use a wide variety of resources are often able to compensate when circumstances change, although some species disappear due to land use changes,” explain the scientists.

This is a tropical dry forest in the dry (left) and rainy season (right).

In conclusion, the authors recommend that the tropical dry forests of both the study area and Mexico in general need to be protected in order for these essential pollinators to be conserved.

“Pollinators are a key component for global biodiversity, because they assist in the sexual reproduction of many plant species and play a crucial role in maintaining terrestrial ecosystems and food security for human beings,” they remind.

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Original source:

Razo-León AE, Vásquez-Bolaños M, Muñoz-Urias A, Huerta-Martínez FM (2018) Changes in bee community structure (Hymenoptera, Apoidea) under three different land-use conditions. Journal of Hymenoptera Research 66: 23-38. https://doi.org/10.3897/jhr.66.27367