A new species Melophagus storozhenkoi Matyukhin, Yatsuk & Nartshuk, 2025 The Hippoboscidae family of blood-sucking flies is a group of specialized blood-sucking ectoparasites that spend all or most of their lives in the fur or feathers of their hosts—mammals and birds. Both sexes feed on blood. For over a century, these flies have been studied as vectors of animal pathogens. The Hippoboscidae family currently includes approximately 220 species. One of the most studied groups of blood-sucking flies is the genus Melophagus. According to various authors, it includes between three and eight species. Their primary hosts are various types of sheep. Members of this genus are believed to have originally been Palearctic species, but have become widespread in Europe, Asia, North America, and South Africa thanks to the breeding of domestic sheep. A new species for this genus — Melophagus storozhenkoi Matyukhin, Yatsuk & Nartshuk, 2025 — was described by researchers at the A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences (IEE RAS). "The parasite was collected from a Marco Polo sheep (Ovis ammon polii) in the area of ​​Lake Zorkul (Gorno-Badakhshan Autonomous Region, Tajikistan). Melophagus storozhenkoi differs from all known species of the genus in the number of setae on the scutellum, scutellum morphology, coloration, thickness and length of the ventral setae, and body coloration," explained Alexandra Yatsuk, PhD, a researcher at IEE RAS. An updated key to all species of the genus Melophagus, including the new one, is provided. The work was published in the journal Zootaxa: A.A. Yatsuk, A.V. Matyukhin, E.P. Nartshuk 2025. A new species of the genus Melophagus Latreille, 1802 (Diptera, Hippoboscidae) from the Eastern Pamir. Zootaxa 5715 (1): 519–523. Related materials: Science. Mail: "Scientists discover new species of bloodsucker fly from the Eastern Pamirs"  

Soil pollution harms flora and fauna. Heavy metals, such as copper, lead, and zinc, are among the most common soil pollutants. Molds, or soil filamentous fungi, seemingly less noticeable but numerous and important soil inhabitants, also encounter these metals in the soil. Molds are considered resilient organisms: they can withstand high levels of pollution and even cleanse soil of heavy metals. However, does this mean that all molds are immune to heavy metals? To address this, a study was conducted at the A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences (IEE RAS), together with colleagues from the S.N. Vinogradsky Institute of Microbiology of the Russian Academy of Sciences. The study examined the effect of copper on important biological molecules of several molds—lipids and osmolytes. Lipids are fat-like substances that play a crucial role in the structure and functioning of living organisms. Lipids are part of the main protective barrier of any cell – the cell membrane. Osmolytes are responsible for the stability of living organisms, despite changing external conditions and stress. The study showed that copper causes changes in the composition of these biological molecules. This helps us understand how molds resist the effects of heavy metals and which fungal species are more successful in this resistance. Therefore, molds can hardly be considered invulnerable to heavy metals. The results of the study were published in the international journal BioMetal (Q1; IF 4.1): Elena V. Fedoseeva, Vera M. Tereshina, Olga A. Danilova, Elena A. Ianutsevich, Anna E. Ivanova, Vera A. Terekhova. Biochemical responses of soil filamentous fungi to copper: changes in lipid and osmolyte composition. Biometals (2025).

The Kamchatka Volcanoes Nature Park Network, in collaboration with scientists from Vitus Bering KamSU and the Institute of Ecology and Evolution of the Russian Academy of Sciences, has begun implementing the first phase of the Presidential Fund for Nature project, "Search, Description, and Development of a Strategy for the Rational Use of Endemic Fish Species from Unexplored Lakes of the Bystrinsky Nature Park." Most of the Bystrinsky Nature Park's water bodies are known to be home to specific salmonids. Understanding their diversity, evolutionary history, population status, and potential risks required specialized scientific research. The first object of study was a cascade of lava-dammed lakes at the foot of Ichinsky Volcano. "The eruption of the volcano's lateral cone 7,500 years ago dammed the river valley with lava. This resulted in the formation of the Ketachan-Arbunat-Angre chain of lakes. The most interesting from a hydrobiological perspective is Lower Angre Lake. This body of water was populated by char through a channel from an ancient glacial lake located higher up the slope," explained project leader Evgeny Esin, Doctor of Biological Sciences. It was in Lake Angre, where the char arrived through a channel from a glacial lake, that nature created its own unique laboratory! Slow water filtration through lava dams and seasonal flooding create favorable conditions for plankton development—the biomass of planktonic crustaceans here is many times higher than in similar lakes in Kamchatka. The char have learned to take advantage of this abundance. Scientists have discovered that an entirely new form has evolved from the familiar form, which feeds on bottom-dwelling invertebrates and spawns in a tributary! It has transitioned entirely to life in the water column and feeds on abundant zooplankton. The difference in food sources has led to divergent maturation and spawning times for the char. "The uniqueness of the speciation event in Lake Angre lies in the tiny size of the ecosystem, covering only 0.2 square kilometers. It is the smallest body of water known to science where vertebrate speciation occurred without geographic barriers," emphasized Acting Rector Olga Rebkovets. Specialists will study endemic fish species inhabiting 11 mountain lakes in the park. This will allow them to understand the diversity and evolutionary history of local fauna. This information is important for developing a strategy for the long-term conservation of ecosystems, especially in the face of increasing anthropogenic impact. The results of the study will be summarized by the end of 2026. A detailed report on the work will be submitted to the Kamchatka Volcanoes Nature Park Network, ensuring a sustainable future for these unique lakes and their inhabitants. The project is being implemented with co-financing from the Interdepartmental Comprehensive Program for Scientific Research of the Kamchatka Peninsula and Adjacent Waters in 2024-2026. Related materials: SM-news:  "The Genetic Chronicle of Kolyma: Arctic Fish Hold Secrets of Glacial Migration and the Key to Survival"   Pravda: "Kolyma Holds the Secret of Ancient Seas: Geneticists Decipher the History of Arctic Fish" Kamchatka Volcanoes: "How Lava Flows Created Lakes, and Tundra Created Hummocks"

Photo: Pagurapseudopsis vietnamica A - male, paratype; B - female, holotype, general appearance; Light microscopy photographs (A, B). Scale bars: 1 mm. A detailed study of crustacean biodiversity in the mangrove swamps of the Cần Giờ Mangrove Biosphere Reserve, located near Ho Chi Minh City in southern Vietnam, revealed a high species diversity of tanaids (Tanaidacea Dana, 1849). These organisms form specific faunal assemblages inhabiting deep-silted mangrove habitats. As part of the study, a new species, Pagurapseudopsis vietnamica Marin, Nguyễn, Palatov, 2025, was described, along with its key ecological characteristics. Molecular genetic analysis revealed its close relationship to P. thailandica Angsupanich, 2001, previously known from Songkhla Lake (lagoon) in Thailand (Gulf of Thailand). However, the new species is clearly distinct in morphological features, particularly in males. In the Kanze mangrove swamps, it coexists with several other tanaid species. Inhabiting the surface and upper layers of alluvial silt covering the bottom of enclosed lagoons surrounded by dense mangrove thickets, during the rainy season (September–October), this species forms dense aggregations of up to 50 individuals per square meter. It is the third most abundant tanaid in this biotope, behind Ctenapseudes vuxuankhoi Marin, Palatov et Nguyễn, 2024 (up to 1,300 individuals/m²) and Pseudohalmyrapseudes alexeitiunovi Marin, Palatov et Nguyễn, 2024 (up to 120 individuals/m²). Photo: The habitat of Pagurapseudopsis vietnamica in the Kanze Mangrove Reserve, and moments of field collection of animals by IEE RAS staff in 2023 Like other marine tanoids found in this area, this species likely plays an important role in the food web, serving as the primary consumer of detritus derived from plant matter arriving from land. Its diet likely consists primarily of detritus derived from decayed or decomposed fallen leaves of the mangrove tree Rhizophora apiculata Lam. These data significantly expand our understanding of the diversity and structural organization of mangrove communities in the region and represent the second discovery of a representative of the genus Pagurapseudopsis in Vietnamese waters. Understanding the mechanisms that shape the biodiversity of these ecosystems is important not only for reconstructing evolutionary processes but also for developing effective conservation strategies. The work was published in the journal Zoosystematica Rossica: A new species of the genus Pagurapseudopsis (Tanaidacea: Pagurapseudopsididae) from the Cần Giờ mangrove area in southern Vietnam I.N. Marin, T.V. Nguyễn, D.M. Palatov Zoosystematica Rossica, 2025, 34(2): 258–271.

Photo: Press Service of the Moscow Department of Nature Management and Environmental Protection Animals need names to be included in their personal health passports The "Active Child Citizen" platform has launched a survey to choose names for four moose — the symbols and pride of Losiny Ostrov National Park. Young Muscovites can learn more about these powerful and noble animals and choose the most suitable name. Photo: Press Service of the Moscow Department of Nature Management and Environmental Protection Ships of the Forest Currently, 10 to 12 adult moose live in the Moscow section of Losiny Ostrov National Park. They roam freely throughout the area, but prefer to remain unnoticed by humans. For their impressive appearance and graceful gait, moose are known as "ships of the forest." National park staff monitor the animals' movements and health parameters using special GPS transmitters. Smart devices have already been attached to the collars of four moose. They also have health passports with biometric data and the ability to track physiological parameters over time. To personalize the health cards, the moose need names that highlight their character and individuality. However, there is a condition: each animal's name must begin with a specific letter, which is indicated on the GPS transmitter. Names for the moose The youngest female moose is three years old, and her satellite tag is marked with the letter D. National park specialists believe the following names might be suitable for her: Demetra, Diona, Dina, Dubrava, Danaya, Dogada, Darina, or Deyana. Photo: Press Service of the Moscow Department of Nature Management and Environmental Protection Another female is five years old. She's in the prime of her life and already has a wealth of life experience. Heritage says E, so the following names were chosen for her: Elka, Elena, Yesenia, Elaya, Yelma, Enoliya, Evia, and Eremya. Photo: Press Service of the Moscow Department of Nature Management and Environmental Protection The wise guardian of the forest - the seven-year-old moose - needs a name beginning with A. The animal knows every path and clearing in the park, and her majestic calm exudes the power of nature. Young city residents might choose the name Arta (derived from Artemis), Ariadne, Aurora, Astrid, Astra, Athena, Aphrodite, or Andromeda. Photo: Press Service of the Moscow Department of Nature Management and Environmental Protection The male moose is four years old. He is young, handsome, confident, and still possesses a youthful, playful spirit. The first letter taken from the tag is B. Suggested options include Boreas, Buran, Bor, Biant, Boethius, Bayar, Bias, and Briar. Photo: Press Service of the Moscow Department of Nature Management and Environmental Protection Young Muscovites aged six to 14 can participate in choosing names for the four moose. A standard account on the mos.ru portal or authorization on the Moscow Electronic School platform is required. For participating in the survey, children will receive points for the city's "Million Prizes" loyalty program. These points can be used to obtain goods and services from partner organizations in a special category on the program's website or in the "Prizes" section of the "Active Child Citizen" platform. These include school backpacks, board games, ice cream molds, promo codes for discounts at stores and cafes, and much more. Researchers from the A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences (IEE RAS) are participating in large-scale research on the Losiny Ostrov site, which began in 2024. Scientists conducted a large-scale ecological survey and discovered over 1,500 animal and plant species in the Moscow section of Losiny Ostrov. More than 200 of these are recognized as rare and protected.

Photo: A female cheetah with her cub in the wild in Kenya. Researchers from the A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences (IEE RAS), the Mara-Meru Nature Reserve in Kenya, and Lomonosov Moscow State University have described for the first time the vocal repertoires of adult and cub wild cheetahs from Kenya. Previously, cheetah vocal repertoires had only been studied in captivity: in zoos and breeding centers. In this study, the acoustic cues and situations in which 12 call types (7 tonal and 5 non-tonal) were used were examined for adult cheetahs over 4 years of age and cubs under 6 months of age. The study found that wild cheetahs use the same set of 8 basic call types previously described for captive cheetahs. In addition to these 8 call types, the researchers described 4 additional call types that were observed in the wild in situations that were either rare or not encountered at all in captivity. The contexts in which cheetahs used different types of vocalizations were similar in the wild and in captivity, with the exception of meowing. While meowing is relatively rare in the wild, it is the most common vocalization in captivity (47.6% of all vocalizations). In the wild, cheetahs meow during non-aggressive, close-range interactions, while in captivity, they primarily use meowing to communicate with their keepers while awaiting food and release for a walk. It is possible that cheetahs use meowing to manipulate their keepers, similar to how domestic cats use meowing to manipulate their owners. The spectrogram illustrates 5 tonal types of calls of adult (top) and cubs (bottom) cheetahs, each sound belonging to a different animal or litter of cheetahs: (a) chirp; (b) meow; (c) scream; (d) chatter; (e) hoot. It was found that during cub maturation, the fundamental and dominant frequencies of seven tonal call types increased, while the duration of seven tonal and three non-tonal call types either remained unchanged or increased. In calls with a rhythmic pulsation (crackles, growls, and purrs), the pulsation frequency was the same in cubs and adults. The acoustic structure of the calls differed slightly between adult males and females. Only in three high-frequency tonal call types (chirps, meows, and howls) were the fundamental and dominant frequencies lower in males than in females, while the duration did not differ between the sexes for any call type. A distinctive feature of cheetah calls from other felid species was the unexpectedly very high fundamental frequency of some tonal call types, in both cubs and adults. These calls were significantly higher-pitched than those of domestic cats, which are many times smaller than cheetahs. The results of the study were published in the Q1 journal Mammalian Biology: Chelysheva E.V., Klenova A.V., Volodin I.A., Vasilieva N.A., Volodina E.V. "Vocal repertoires of wild-living cub and adult cheetahs (Acinonyx jubatus): call types, acoustic parameters, and contexts." Mammalian Biology, 2025, v. 105, no. 4, pp. 499-516. Related materials: RAS: "Researchers have described the vocal repertoire of adult and cub cheetahs in the wild" Science.Mail: "Russian scientists have studied the cheetah 'language'"

We live in an era when animal and plant species are rapidly spreading beyond their native ranges due to human activity. Species that have conquered new territories are called “alien species” or "invaders". Today, some species can be found almost worldwide, making their distribution "global." These species are referred to as "global invaders." Such species include the Eastern mosquitofish (Gambusia holbrooki), which was historically actively distributed around the world to control mosquito larvae, and the African clawed frog (Xenopus laevis), which is widely used in medicine and scientific laboratories. These animals were introduced to water bodies in regions where they had never existed before, and if the climate permited, they reproduced, spreading to neighboring water bodies, and harming native animal species. Both the mosquitofish and the clawed frog are voracious predators capable of eating almost any small animal, including invertebrates and small vertebrates such as tadpoles and fish. However, what will happen if these two global invaders, the mosquitofish and the clawed frog, meet in the same water body? Scientists from the A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences conducted a series of specialized laboratory experiments. The researchers assessed the vulnerability of different life stages of the clawed frog (eggs, hatchlings, tadpoles, newly-metamorphosed froglets, and adults) to predation by the mosquitofish, and also tested whether adult clawed frogs prey upon juvenile and adult mosquitofish. The results confirm differences in the palatability of different ontogenetic stages of the clawed frog to the mosquitofish, as well as the low palatability of mosquitofish for adult frogs, with the exception of mosquitofish juveniles, which are relatively protected in well-lit conditions (during the day) but highly vulnerable under low-light conditions (at night). Thus, these behavioral interactions are complex and can be defined as "asymmetrical bidirectional predation": the mosquitofish readily eliminates its opponent at early developmental stages (eggs, hatchlings, tadpoles, metamorphs), but under certain conditions, it may itself become prey for adult frogs. The discovery of a vulnerable stage in the mosquitofish makes it impossible to definitively state that this fish will suppress clawed frog populations when the two invaders meet in new regions of the planet. In any case, mosquitofish are likely to dominate in urban water bodies with artificial lighting. The practical significance of this study is that we have taken another step toward understanding what nature around us, including the species composition of ponds and lakes, will look like as a result of irreversible global changes driven by human activity. The results of the study were published in an international journal NeoBiota (Q1; JCR IF 3.1): Reshetnikov A.N., Raldugina A.O., Grinchenko D.V., Kidov A.A., Platonov N.G., Petrovskiy A.B., 2025. Predatory interactions between two global aquatic invaders beyond their native ranges: An experimental approach. NeoBiota 102: 173–189. DOI: 10.3897/neobiota.102.145644

Photo: The northern mole vole uses its enormous teeth to dig underground tunnels, where it lives permanently, with almost no access to the surface. Dental x-rays allow the animals' ages to be estimated in the field. The subterranean rodent, the northern mole vole (Ellobius talpinus), is an interesting subject for ecological research. A key requirement for ecological projects is the ability to reliably estimate the age of living mole voles when capturing them in the field. Researchers from the Herzen St. Petersburg Pedagogical University, St. Petersburg State University, the University of Tokyo, and the A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences (IEE RAS) conducted an X-ray study of various age cohorts of individually tagged northern mole voles in a natural population in the Saratov region of Russia. Photo: X-rays of the skulls of northern mole voles of three age classes: a - class 1 (young of the year), b - class 2 (yearlings); c, d - class 3 (overwintered two or more winters). USF - synclinal fold of the first upper molar; LSF - synclinal fold of the first lower molar. Radiography is one of the most promising methods for non-invasively determining the age of animals. In this study, the researchers applied it for the first time to live rodents from a wild population. Radiographs were obtained in the field using a portable X-ray machine and a digital radiovisiograph. Thanks to intensive capture and tagging of mole voles at the model site since 2021, the ages of many individuals were known, which allowed them to identify age-related dental traits, develop a model for age class determination, and successfully validate this model. "The use of field radiography can significantly improve the efficiency of many ecological studies, expand the range of tasks that can be solved, save scientists time, and ensure the ethical welfare of the mole vole under study," said Elena Volodina, PhD, Senior Researcher at the Institute of Ecology and Evolution of the Russian Academy of Sciences. Two traits were selected as age-related indicators: the length of the second synclinal groove of the upper first molar and the length of the second synclinal groove of the lower first molar. Both indicators decreased with age. No sex differences were found in the age-related dynamics of these traits. Discriminant analysis showed that reliable discrimination between age classes is possible when adding radiograph date as a predictor to the molar traits. Model accuracy was 99%, and cross-validation accuracy was 97%. The primary contribution to discrimination comes from the first discriminant function, primarily related to the indicator characterizing molar length. The article was published in the European Journal of Wildlife Research: Nikonova V.R., Naumova A.E., Bergaliev A.M., Dymskaya M.M., Rudyk A.I., Volodina E.V., Smorkatcheva A.V., 2024. Dental radiography as a low-invasive field technique to estimate age in small rodents, with the mole voles (Ellobius) as an example. European Journal of Wildlife Research, 2024, v. 70:46.

Photo by Rosneft Rosneft environmentalists have developed a standard corporate program for biodiversity conservation in all regions where the Company operates. The document was developed based on years of experience in biodiversity conservation research and projects, as well as a wealth of scientific data obtained during numerous environmental expeditions. Experts from the A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, Rosneft's Arctic Research Center, and the Company's research institute in Tyumen participated in the research. The program is the result of extensive work, which resulted in the compilation of a prioritized and comprehensive list of significant biological indicator species: marine and terrestrial mammals, birds, amphibians and reptiles, fish, terrestrial invertebrates, zoo- and phytoplankton, and terrestrial plants. The document contains a full description of each bioindicator species. While developing the program, environmentalists compiled inventories of specially protected natural areas in Russia that correspond to Category 1a "Strict Nature Reserve" and Category 1b "Wilderness Area" according to the International Union for Conservation of Nature (IUCN). These natural sites have high ecological significance and are included on the UNESCO World Heritage List. Inventories of mandatory and additional biodiversity conservation measures implemented in 2018–2022 in the Company's regions of operation were also compiled. The program takes into account the requirements and recommendations of Russian biodiversity conservation legislation, as well as the provisions of the Kunming–Montreal Global Framework and other international agreements, as well as recommendations from international industry associations of oil and gas producers. The document also includes a standard biodiversity conservation program template for subsidiaries. A pilot test is planned for a number of companies. Based on the results of the pilot project, it is planned to approve a unified standard biodiversity conservation program for the Company, which will take into account the specifics of the region, the type of activity, and other criteria of the subsidiaries. This will be a significant contribution to supporting national environmental protection projects. Preserving and restoring ecosystems and implementing biodiversity conservation programs are among Rosneft's strategic environmental goals. Rosneft is implementing the largest Arctic flora and fauna study program since Soviet times. Over 13 years, more than 60 expeditions have been conducted, covering all Arctic seas, islands, and coastlines. During the course of this work, habitats were thoroughly studied and more than 400 animals were examined, 140 individuals were tagged with satellite transmitters, and more than 1,500 laboratory analyses were performed on collected biological samples. Rosneft supports the Amur Tiger Center, an autonomous non-profit organization, aimed at increasing the Amur tiger population and protecting the environment in the predator's habitat. The Company's funds are being used to develop a comprehensive Amur tiger protection system, including outside specially protected natural areas, equipping hunting control teams with modern technology and equipment to combat poaching, preserving the prey base, and reducing conflicts between tigers and humans. The project also includes population monitoring and scientific research on the largest cat on Earth, as well as outreach and educational activities. These joint efforts have helped increase the Amur tiger population, which currently exceeds 750 individuals, to ensure the survival of this unique animal. Rosneft subsidiaries are also implementing various conservation projects to study key flora and fauna species in the regions where they operate. In the Far East, 80 nesting sites of the Steller's sea eagle were discovered during the "Under a Strong Wing" project. The project aims to restore and preserve the population of this bird species. The data obtained served as the basis for developing a set of measures to protect the largest birds in the Far East, which are listed in the Red Book. With the Company's support, specialists from the Central Siberian State Nature Reserve studied musk deer habitats in Evenkia. They discovered that the population in an area previously considered unsuitable for these even-toed ungulates now numbers 300 individuals. The research findings open new prospects for protecting the small musk deer population from predators. The possibility of establishing a farm for breeding this animal, which is listed as vulnerable in the Red Data Book of several Russian regions and the IUCN Red List, is also being explored. A monitoring program for the Okhotsk Sea population of gray whales, a rare, endangered species of marine mammal native to the northern Pacific Ocean, has been underway in the Sakhalin Region for 27 years. The results of many years of research are presented in a series of environmental atlases. Rosneft has published a number of scientific reports on the Company's activities, including expeditions. More than 60 indicator species are described in the atlas "Species – bioindicators of the state of marine Arctic ecosystems," published in 2020. The company actively participated in various events within the national project "Ecology" from 2020 to 2023. Over 320 million rubles were allocated from 2019 to 2023 for a project to study the dynamics of key species—indicators of the sustainability of Arctic ecosystems. In 2024, at the 27th St. Petersburg International Economic Forum, Rosneft signed a new agreement with the Ministry of Natural Resources and Environment of the Russian Federation on the joint implementation of several activities from 2024 to 2027 under the federal project "Conservation of Biodiversity and Development of Ecotourism" as part of the national project "Environmental Well-Being."

Photo: Macrothrix tripectinata, a rare species found in Tyva. The functioning of Eurasian freshwater ecosystems is impossible without cladocerans, which play a key role in the food webs of most continental water bodies. Although cladoceran fauna has been relatively well studied in the Palearctic overall, several regions of Central Asia, and the Republic of Tyva in particular, have remained an almost entirely "blank spot" on the research map. A new study, conducted by researchers from the Tyva Institute for Integrated Natural Resource Development SB RAS and the A.N. Severtsov Institute of Ecology and Evolution RAS (IEE RAS), summarizes the results of nearly thirty years of fieldwork in the region (1993–2022). The scientists surveyed 902 water bodies of various types—from shallow puddles to high-altitude lakes—and examined the variability of cladoceran species richness depending on the water body's depth, location above sea level, and salinity. A total of 76 species of cladocerans have been identified. However, not a single invasive species has been found in Tuva, although such discoveries are not uncommon among cladocerans. "Long-term and systematic study of the region allows us to obtain a comprehensive picture of biodiversity and zooplankton dynamics in the mountain systems of Central Asia," emphasizes A.A. Kotov, Doctor of Biological Sciences, Chief Researcher at the Laboratory of Ecology of Aquatic Communities and Invasions at IEE RAS. Photo: Collection of samples in one of Tyva’s many lakes. All study materials (including collection site coordinates, dates, researcher information, and taxonomic data) have been published in the GBIF international database in Darwin Core Archive format, making them publicly available for use in basic and applied research. This study not only supplements the faunal lists for Central Asia but also lays the foundation for future biogeographical and ecological research related to the functioning of Eurasian freshwater ecosystems. The article was published: Kirova, N., Kirova, V., Kotov, A. (2025). Cladocera fauna of the Republic of Tyva, Russia: dataset from 30 years of investigations (1993–2022). Biodiversity Data Journal.