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Изменение концентраций неорганических соединений азота в сточных водах горнодобывающего предприятия микроводорослью Chlorella vulgaris
No full textWastewater contamination by nitrogen compounds is a serious problem for the mining, industrial and utility companies. Nitrogen can enter quarry effluent when explosives containing ammonium nitrate are used in blasting operations. This nitrogen pollution of water leads to environmental damage and human disease, companies that exceed the legal limits for nitrogen pollution are subject to fines. Nitrogen is removed from wastewater by biological methods, but their efficiency is low in the Northern regions of Russia due to climatic factors that hinder the vital activity of organisms. Therefore, it is essential to develop wastewater treatment technologies for the removal of nitrogen compounds. This study focuses on the ability of the microalgae Chlorella vulgaris to absorb and utilize various inorganic nitrogen compounds in mining effluents using the example of effluents from the "Karelsky Okatysh" mine and tailings dam (Kostomuksha, Republic of Karelia). Concentrations of ammonium, nitrate and nitrite in water and microalgal biomass in water samples have been investigated. A novelty of the study is the evaluation of pollutant concentrations in parallel experiments with different cultivation conditions. It has been found that when Chlorella vulgaris is cultivated at 26 °C, aeration and artificial light, the concentration of ammonium decreases. These results show the promising application of bioreactor technologies for the treatment of ammonium polluted wastewater.Загрязнение сточных вод соединениями неорганического азота является серьезной проблемой для горнодобывающей отрасли, промышленных и коммунальных предприятий. Азот может попадать в сточные воды карьеров, когда для взрывных работ используются взрывчатые вещества, содержащие нитрат аммония. Такое загрязнение воды азотом приводит к экологическому ущербу и заболеваниям людей, компании, превышающие установленные законом пределы загрязнения азотом, облагаются штрафами. Утилизация азота из сточных вод осуществляется биологическими методами, однако эффективность биологических методов в северных регионах России низка в силу климатических факторов, затрудняющих жизнедеятельность организмов. Поэтому важно разработать технологии очистки сточных вод для удаления соединений азота. В работе анализируется способность микроводоросли Chlorella vulgaris поглощать и использовать разные формы неорганических соединений азота в сточных водах горнодобывающей промышленности на примере сточных вод отстойника карьера и хвостохранилища предприятия "Карельский окатыш" (Костомукша, Республика Карелия). Изучены концентрации аммония, нитратов, нитритов в воде и биомасса микроводорослей в образцах воды. Новизной исследования является оценка концентраций загрязняющих веществ в параллельно идущих опытах с различными условиями культивирования. Установлено, что при культивировании Chlorella vulgaris при температуре 26 °C, аэрации и искусственном освещении концентрация аммония снижалась. Эти результаты свидетельствуют о перспективности биореакторных технологий очистки сточных вод от аммония.PublishedReferee
Metal causing DNA damage in lion fish Pterois miles from the northeastern Mediterranean.
No full textThe influence of trace metal contamination on marine ecosystems and marine waters is a complex construct. Metal concentrations can cause carcinogenic and toxicogenic harm in marine environments. With a variety of sizes, ages, and trophic levels, fish are excellent markers of pollution from heavy metals for the identification of genotoxic factors in freshwater as well as marine systems. The current study used the damage frequency (%), arbitrary unit (%), and genetic damage index (%) in the gill and liver cells of P. miles to assess DNA damage brought along by toxic metals. Under the constant levels criteria used in this investigation, the levels of Cr, Hg, Fe, and Zn in the surrounding water are only slightly above the tolerance level. According to our findings, the frequency of damage in the lionfish's gill and liver cells was 53.66 to 73.512% and 39.33 to 45.033%, accordingly. The gill tissue had a higher frequency of injury than the liver tissue. Furthermore, Pb, Hg, Cr, Co, Fe, Ni, and Cu contents in seawater were shown to have a positive correlation with DNA damage levels in P. miles. As a result, our study revealed the first time genotoxic damage resulting from metal contamination in P. miles.PublishedReferee
Survey, national nodes & regional landscape of the UN Ocean Decade Actions.
No full textThe regional node of the ECOP Programme in Asia (hereinafter referred to as “ECOP Asia”) was informally established in June 2021, during the Virtual Early Career Ocean Professionals Day (V.ECOP Day). At the time, ECOP Asia was composed of a dozen volunteer members from countries across East, South and Southeast Asia, including Bangladesh, China, India, Indonesia, Japan, Malaysia, Philippines and the Republic of Korea. The core team met on a monthly basis with the aim of connecting interdisciplinary groups of ECOPs across the continent, and sharing knowledge and experience about the recently launched United Nations Decade of Ocean Science for Sustainable Development (2021-2030) (hereinafter referred to as the “UN Ocean Decade”). Members of the informal 2021 ECOP Asia group were particularly active and motivated to spread the word about ECOPs and the UN Ocean Decade. Among other contributions, they circulated the first pan-Asia ECOP survey in early Spring 2021 (with region- and country-specific results available in this report1), celebrated “World Oceans Day” on 8 June 2021 by sharing inspiring testimonials from ECOPs across India (video), made short awareness-raising interventions during online webinars and workshops, and moderated a Decade Action Incubator Session dedicated to ECOPs during the UN Decade Regional Kickoff Conference for the Western Pacific and its Adjacent Areas, a two-day conference co-sponsored by the Intergovernmental Oceanographic Commission of UNESCO (IOC-UNESCO) and its sub-commission for the Western Pacific (WESTPAC). The latter session provided perspectives on science communication, inviting speakers from different career stages and ocean sectors2 (video recording is available here). On November 2021, the IOC-UNESCO launched a call for individual consultants to support a variety of tasks related to the development of the regional dimensions of the ECOP Programme, seeking coordinators in Africa, Asia, Oceania and the Caribbean Small Island Developing States (SIDS)3. A regional consultant was subsequently hired for Asia in mid-December 2021 and has remained in this position since then. The hiring process coincided with the official launch of the ECOP Programme website, including dedicated web pages for the first three regional and national ECOP nodes: Africa, Asia and Canada4. By November 2022, a national node in Japan and regional hub in Central America were also established, followed closely by a new regional chapter in the Caribbean. Throughout the first half of 2023, another nine additional national nodes have emerged from all over the world, including in Brazil, Italy, Morocco, Niger, Nigeria, the Republic of Korea, Senegal, Togo and the United States. Several other ECOP chapters are waiting in the pipeline, currently building their own core teams, drafting concept notes, and engaging with their respective communities (e.g., Australia/New Zealand, Belgium, China, Europe, India, Liberia, Malaysia, Mexico, Mozambique, Spain and the United Kingdom). Extending from the Middle East all the way to Indonesia in Southeast Asia, and including the Russian Federation5, the ECOP Asia community grew significantly throughout 2022 and in the early months of 2023 (see section I). Figure 1 below provides a non-exhaustive list of 2022 activities and highlights that contributed to the development and expansion of ECOP Asia since the appointment of the regional consultant/coordinator. Table 1 lists more recent updates and achievements since November 2022, including ongoing work in 2023.PublishedNot Know
Reef fish assemblages in San Felipe Keys National Park, Cuba: Influence of fishing and habitat
No full textEl mantenimiento de los servicios de los arrecifes de coral depende, en gran parte, de la conservación de la ictiofauna, y para desarrollar estrategias dirigidas a su conservación se requieren datos sobre su condición y amenazas. Este trabajo tuvo el objetivo de describir las asociaciones de peces de arrecifes en el Parque Nacional Cayos de San Felipe (PNCSF) y explorar la influencia de la pesca y el hábitat sobre atributos comunitarios. Entre 2013 y 2015, se estudiaron nueve sitios del arrecife (15-25m) con estéreo-video (535 transectos de 50m x 2m) y se contaron 47 792 individuos. La ictiofauna se caracterizó por un número alto de especies, alta densidad de especies de talla pequeña y biomasa acumulada en depredadores tope y macrocarnívoros (pirámide trófica invertida debido a agregaciones de pargos). Cerca del 60 % de la variación de la ictiofauna fue explicada por la turbidez del agua y la heterogeneidad del fondo. La densidad (90 indiv./100m2), la talla (14.2cm) y la biomasa de la ictiofauna (12 kg/100m2) y la biomasa de pargos y meros (65 g/m2) promedio del PNCSF, fueron similares a la de otros arrecifes protegidos. Sin embargo, se observó efecto negativo de la pesca en la disminución de indicadores de abundancia y talla a nivel de grupos funcionales y familias de interés para la pesca en el área oriental del PNCSF (mayor presión de pesca) con relación al área occidental. Además, la biomasa (15 g/m2) de herbívoros en el PNCSF y la de pargos y meros (12 g/m2) en el área oriental se evalúo como pobre. La información brindada puede ayudar a la toma de decisiones para el mejor uso de los recursos del arrecife en el PNCSF.The maintenance of coral reef services depends largely on the conservation of the ichthyo- fauna and to develop strategies aimed at its conservation, data on its condition and threats are required. This work aimed to describe reef fish associations in the San Felipe Keys National Park (NPSFK and explore the influence of fishing and habitat on community attributes. Between 2013 and 2015, nine reef sites (15-25 m) were studied with stereo-video (535 transects of 50 m x 2m) and 47 792 individuals were counted. The ichthyofauna was characterized by a high number of species, high density of small species and accumulated biomass in top predators and macrocarnivores (inverted trophic pyramid due to snap- per aggregations). About 60% of the variation of the ichthyofauna was explained by the turbidity and heterogeneity of the bottom. The density (90 indiv./100m2), size (14.2 cm) and average biomass (12 kg/100m2) of the NPSFK´s ichthyofauna were similar to that of other protected reefs. However, the negative effect of fishing was observed in the decrease of indicators of abundance and size at the level of functional groups and families of interest for fishing in the eastern area of the NPSFK (greater fishing pressure) in relation to the western area. In addition, the biomass (15 g/ m2) of herbivores in the NPSFK and that of snappers and groupers (12 g/m2) in the eastern area was assessed as poor. The information provided can help decision-making for the best use of coral reef resources in the NPSFK.PublishedReferee
Характеристика зоопланктонного сообщества западной части Пролетарского водохранилища в весенний период 2021–2022 гг.
No full textThe Proletarsky Reservoir located in the Kuma–Manych Depression is a water body that is highly important for the fisheries in the Southern Russia. Its western part is the most economically valuable, which necessitates the investigation of its zooplankton serving as a food source for the larvae and planktivorous fish. This work presents the results of investigation of the zooplankton community in this area during fish spawning campaign in the spring seasons of 2021–2022. In spring, the zooplankton was represented by 4 groups of organisms (30 species), which include rotifers, copepods, cladocerans, and meroplankton. Among them, the copepods were the most diverse, with the species of Cyclopoida suborder being the most prevalent. The rotifers were the most abundant, comprising 67 % of the total zooplankton abundance. The cladocerans comprised the major part of the zooplankton biomass; their share in the total biomass consistently remained at 79 %. The total biomass of the zooplankton exceeded 300 mg/m3, which is sufficient to provide the planktivorous fish species and their larvae with a food source.Пролетарское водохранилище, расположенное в Кумо-Манычской впадине, является важным водным рыбохозяйственным объектом юга России. Западный участок водохранилища имеет наибольшее рыбохозяйственное значение, что обуславливает актуальность исследования зоопланктона, являющегося кормовой базой личинок и планктоноядных рыб. В работе представлены результаты изучения в весенние сезоны 2021–2022 гг. зоопланктонного сообщества на этой акватории в период нереста рыб. Зоопланктон весной был представлен 4 группами организмов (30 видов), которые включают коловраток, веслоногих и ветвистоусых ракообразных, меропланктон. Наиболее разнообразны веслоногие ракообразные, среди которых доминировали представители п/отр. Cyclopoida. Коловратки характеризовались высокой численностью, составляющей более 67 % общего количества зоопланктеров. Основу биомассы зоопланктона формировали веслоногие ракообразные, доля которых в общей биомассе стабильно соответствовала 79 %. Общая биомасса зоопланктона составляла более 300 мг/м3, что является хорошим уровнем кормовой базы для планктоноядных рыб и их личинок.PublishedNon Referee
Макрофиты рода Potamogeton — биоиндикаторы накопления тяжелых металлов
No full textThis work presents the investigation of the content of some heavy metals in the pondweeds of the Lower Volga River Delta within the area of Astrakhan State Biosphere Reserve. Higher aquatic plants extract chemical elements both from bottom sediments and water column. Moreover, the macrophytes, namely the representatives of Potamogeton genus, are capable of extraction and accumulation of the metals dissolved in the water, contained in the suspended colloidal particles, and present on the surface of leaves. This work is aimed at the identification of species-specific features of the typical hydatophytes (aquatic plants of Potamogeton genus) pertaining to the accumulation of heavy metals. The content of chemical elements in the investigated specimens has been identified using atomic absorption spectrometry; the results have been processed with statistical methods. It has been found that all investigated plant species accumulate iron and manganese in the highest quantities and cobalt and cadmium in the lowest. The investigated pondweed species have shown species-specific properties in the accumulation of chemical elements. Potamogeton crispus and Potamogeton lucens are found to be iron concentrating species. Potamogeton lucens also accumulates nickel, iron and manganese, and Potamogeton pectinatus accumulates chrome, cobalt and lead.В работе проведено исследование содержания некоторых тяжелых металлов в составе рдестов, произрастающих в низовьях дельты реки Волги на территории Астраханского государственного заповедника. Высшая водная растительность способна извлекать химические элементы как из донных отложений, так и из водной толщи. При этом макрофиты, а именно представители рода Potamogeton, могут экстрагировать и накапливать химические элементы не только растворенные в воде, но и присутствующие во взвешенно-коллоидном материале водной массы и на поверхности листьев. Целью работы являлось выявление видовых особенностей типичных гидатофитов — растений рода Potаmogeton — в накоплении тяжелых металлов. Концентрацию химических элементов в объектах исследования определяли методом атомно-абсорбционной спектрометрии, результаты обрабатывали статистически. Обнаружено, что все изученные виды растений в большей мере аккумулируют железо и марганец и в минимальных количествах — кобальт и кадмий. У изученных видов рдестов выявлены видовые особенности в накоплении химических элементов. Концентраторами железа являются Potamogeton crispus и Potamogeton lucens. При этом Potamogeton lucens является аккумулятором никеля, железа и марганца, а Potamogeton pectinatus — хрома, кобальта и свинца.PublishedReferee
Обзор задач и результатов исследований АзЧерНИРО (ЮгНИРО) в области промысловой океанологии и морской геологии
No full textThe 60–80s of the last century were the period of the most rapid development of commercial oceanology in the Azov and Black Sea Scientific Research Institute of Marine Fisheries and Oceanography (AzCherNIRO, further renamed YugNIRO). In addition to the monitoring of oceanographic processes, it was involved in the areas of general marine ecology, monitoring of marine pollution, and space oceanology. Oceanographic information is used in forecasting the state of aquatic ecosystems at various timescales and is crucial for fishing forecasts. In 1981, a satellite data reception center was established in AzCherNIRO. In the 80–90s, in YugNIRO, an optimal procedure was created for multidimensional predictive monitoring of the state of the Black Sea ecosystem. In September 1986, within the Laboratory of Commercial Oceanology of the Black Sea, a group for the conservation of marine ecosystems was created, which turned into a sector in January 1989, and into a separate laboratory in December 1996. Its reasearchers carried out multidisciplinary environmental studies, investigating the ecological status of the aquatic areas affected by the facilities of the marine industry during their operation, monitoring the level of soil contamination, and excercising the toxicological control of fish and fish products. YugNIRO oceanological studies conducted in the World Ocean from the early 1970s to the early 1990s made it possible to link the productivity and catches of exploitable species to the atmospheric circulation, changes in the climatic fields of currents, as well as to the geo- and heliophysical factors, which enabled the fishing predictions with a one-year lead time or more for the fishing areas of the Central, Southeastern and Southwestern Indian Ocean, the Patagonian Shelf, and the Indian Ocean sector of Antarctica. In the 70–90s and early 2000s, YugNIRO conducted marine geological studies facilitating fishing operations and environmental protection in the Gulf of Aden, on the bottom elevations of the tropical and subtropical parts of the Indian Ocean, in the Antarctic Shelf area, and in the Black and Azov Seas. This article lays down the current major goals and prospects of commercial oceanology.60–80-е годы прошедшего столетия были в АзЧерНИРО (ЮгНИРО) периодом наиболее активного развития промысловой океанологии. Кроме мониторинга океанографических процессов она начала внедряться в сферы общей экологии моря, мониторинга загрязнения моря, космической океанологии. Океанографическая информация используется при разработке прогнозов состояния водных экосистем различной заблаговременности и является неотъемлемой составляющей рыбопромысловых прогнозов. В 1981 г. в АзЧерНИРО был создан центр приема спутниковой информации. В 1980–1990-х гг. в ЮгНИРО была создана оптимальная для Черного моря схема комплексного прогностического мониторинга состояния его экосистемы. В сентябре 1986 г. в составе лаборатории промысловой океанологии Черного моря была создана группа, в январе 1989 г. — сектор, в декабре 1996 г. — лаборатория охраны морских экосистем. Сотрудниками лаборатории проводились комплексные экологические исследования состояния акваторий предприятий морехозяйственого комплекса в условиях их производственной деятельности, контроль уровня загрязненности почв, токсикологический контроль рыбы и рыбопродукции. Океанологические исследования ЮгНИРО, проводимые в Мировом океане с начала 1970-х до начала 1990-х гг., позволили получить систему связей урожайности и вылова промысловых объектов с особенностями атмосферной циркуляции, изменениями макромасштабных полей течений, гео- и гелиофизическими факторам для прогноза промысловых характеристик с заблаговременностью год и более в промысловых районах центральной, юго-восточной и юго-западной частей Индийского океана, в районе Патагонского шельфа, в индоокеанском секторе Антарктики. Выполнение морских геологических работ в рыбопромысловых и природоохранных целях проводилось ЮгНИРО в 1970–1990-х и в начале 2000-х гг. в Аденском заливе, на поднятиях тропической и субтропической частей Индийского океана, на шельфе Антарктиды, в Черном и Азовском морях. В статье формулируются основные современные цели и пути развития промысловой океанологии.PublishedNon Referee
Pressões induzidas pelo homem impulsionando a biodiversidade e o funcionamento dos ecossistemas de água doce.
No full textMany studies have shown that human-induced pressures are causing species loss across many trophic groups, with potential negative effects ability of ecosystems to maintain functions and provide services to human well-being. However, evidence for this prediction is still lacking in freshwater ecosystems. In this document, we report the results of four studies that investigated the effects of human-induced disturbance on (i) biodiversity, (ii) ecosystem functioning, and (iii) biodiversity-ecosystem functioning relationships. These studies were conducted in different freshwater ecosystems and encompassed multiple spatial and temporal scales. In the first study, we used a 12-year data set from a shallow lake displaying shifts between three alternative states (clear, turbid and shaded). We investigated how the biodiversity (taxonomic and functional) of fish and zooplankton, ecosystem multifunctionality (provision of multiple ecosystems functions simultaneously) and their relationships were affected by shifts between alternative states. Biodiversity of fish and zooplankton and multifunctionality enhanced during clear-water state, but decreased during turbid and shaded states. The relationship between biodiversity and multifunctionality was strongly positive during the clear state, but weakened after the lake shifted to turbid and shaded states. In the second study, we used a dataset of 72 lakes from four large Brazil wetlands to examine how increased human pressure (human footprint) affected the relationship between the biodiversity (taxonomic and functional) of seven groups of aquatic organisms and multifunctionality. The biodiversity of most organismal groups was positively associated with multifunctionality. However, increased human pressure has weakened these relationships, and for some groups these relationships have become negative. In the third study, we used a dataset of 61 streams from two Neotropical biomes (Amazonian rainforest, Uruguayan grasslands) to investigated how increased cover human land-uses (agriculture, pasture, urbanization and afforestation) affected the biodiversity (taxonomic and functional) of fish, arthropods and macrophytes, and the consequences of this for animal biomass production. In both biomes, the biodiversity of animal and plant assemblages decreased with increasing cover of land-uses. Land-uses reduced animal biomass through direct and indirect pathways mediated by declines in biodiversity. In the fourth study, we investigate how increasing human pressure affects fish diversity and the consequences of this for energy flux in fish food webs over 17 years in a subtropical river (Uruguay River). Human pressure was associated with temporal declines in diversity and energy flux in all fish trophic compartments, and the relationship between diversity and energy flux weakened over time. Collectively, these studies reveal that human-induced disturbances reduce the biodiversity of various groups of organisms in different types of aquatic ecosystems. The decline in biodiversity, in turn, reduces the ability of these ecosystems to sustain multiple functions.Muitos estudos demonstraram que as pressões induzidas pelo homem estão causando a perda de espécies em muitos grupos tróficos, com potenciais efeitos negativos na capacidade dos ecossistemas de manter funções e prestar serviços para o bem-estar humano. No entanto, ainda faltam evidências consistentes para esta previsão nos ecossistemas de água doce. Reportou-se os resultados de quatro estudos que investigaram os efeitos da perturbação induzida pelo homem sobre (i) a biodiversidade, (ii) o funcionamento dos ecossistemas e (iii) as relações entre biodiversidade e funcionamento dos ecossistemas. Estes estudos foram conduzidos em diferentes ecossistemas de água doce e abrangeram múltiplas escalas espaciais e temporais. Utilizou-se um conjunto de dados de 12 anos de um lago raso exibindo mudanças entre três estados alternativos (claro, túrbido e sombreado). Investigou-se como a biodiversidade (taxonômica e funcional) de peixes e zooplâncton, a multifuncionalidade do ecossistema (provisão de múltiplas funções ecossistêmicas simultaneamente) e suas relações foram afetadas por mudanças entre estados alternativos. A biodiversidade de peixes e zooplâncton e a multifuncionalidade aumentaram durante o estado de águas claras, mas diminuíram durante os estados turvos e sombreados. A relação entre biodiversidade e multifuncionalidade foi fortemente positiva durante o estado de águas claras, mas enfraqueceu após a mudança do lago para estados turvos e sombreados. Empregou-se um conjunto de dados de 72 lagos de quatro grandes planícies do Brasil para examinar como o aumento da pressão humana (pegada humana) afetou a relação entre a biodiversidade (taxonômica e funcional) de sete grupos de organismos aquáticos e a multifuncionalidade. A biodiversidade da maioria dos grupos de organismos foi positivamente associada à multifuncionalidade. Entretanto, o aumento da pressão humana enfraqueceu estas relações, e para alguns grupos estas relações se tornaram negativas. Utilizou-se também um conjunto de dados de 61 córregos de dois biomas neotropicais (floresta amazônica, pastagens uruguaias) para investigar como o aumento da cobertura do uso do solo humano (agricultura, pastagem, urbanização e florestamento) afetou a biodiversidade (taxonômica e funcional) de peixes, artrópodes e macrófitas, e as consequências disso para a produção de biomassa animal. Em ambos os biomas, a biodiversidade dos conjuntos de animais e plantas diminuiu com o aumento da cobertura de uso do solo. Os usos do solo reduziram a biomassa animal através de caminhos diretos e indiretos mediados por declínios na biodiversidade. Por fim, investigou-se como a crescente pressão humana afeta a diversidade dos peixes e as consequências disso para o fluxo de energia nas teias de alimento de peixes durante 17 anos em um rio subtropical (rio Uruguay). A pressão humana foi associada a declínios temporais na diversidade e no fluxo de energia em todos os compartimentos tróficos de peixes, e a relação entre diversidade e fluxo de energia enfraqueceu com o tempo. Coletivamente, estes estudos demonstram, de maneira consistente, que as perturbações induzidas pelo homem reduzem a biodiversidade de vários grupos de organismos em diferentes tipos de ecossistemas aquáticos. O declínio da biodiversidade, por sua vez, reduz a capacidade desses ecossistemas de sustentar múltiplas funções.Ph
Striped red mullet (Mullus surmuletus, Linnaeus, 1758) from Rafraf-Sidi Ali Mekki region (Bizerte, Tunisia): length-weight relationship and histological assessment of gonad maturation.
No full textThe aim of this study is to investigate thegonadal changes of striped red mullet (MullussurmuletusLinnaeus, 1758) in Rafraf –Sidi Ali Mekki region in Tunisia. A total of 243specimens were collected monthlybetween March 2014 and February 2015.Fulton’s condition factor (K) and the length-weight parameters were estimated. There was correlation between the fish total length and weight (R2:0.75). The K values ranged between 0.93 and 3.38. The values of b parameter ranged from 3.18. gonadosomaticand hepatosomatic indicesshow maximum values during April. Different stages in females and inmales were observed according to gonadal development.PublishedReferee
Характеристика таксономического состава полихет в акватории бухты Ласпи (Крым, Черное море)
No full textThe coastal zone of Laspi Bay (the Crimea, Black Sea) is attractive for the development of recreational activities. It can negatively affect the state of the bay ecosystem and adjacent waters. The aim of this study is to assess the current state of polychaetes inhabiting the loose soils of the littoral and sublittoral areas of Laspi Bay. In 2016–2019 the fauna of polychaetes was studied in the waters of Laspi Bay. Macrozoobenthos were collected on cruises 84, 86, 96, 108 aboard the research vessel Professor Vodyanitsky and in coastal expeditions. 89 samples were taken (19 deep-water, 70 coastal). 45 species of polychaetes were identified. The average abundance of Polychaeta was 2 368 ± 467 ind./m2. The average biomass was 44,128 ± 13,919 g/m2. Terebellides stroemii makes a significant contribution to the formation of these indicators. The ranked series by density index is headed by T. stroemii, Nephtys hombergii and Melinna palmata. The largest abundance of species is noted at a depth of 46 m where the soil is represented by sand and pebbles. The highest number is noted at depths of 93.5–98 m. Prionospio сirrifera makes the main contribution to the total number. The highest biomass is noted at depths of 53.5–58 m. T. stroemii makes the main contribution to the total biomass. In the Laspi Bay waters are recorded characteristic species – P. сirrifera and Micronephthys longicornis. They are found both in shallow waters and at great depths. Rare species found only at one station include 18 polychaete species. The results obtained give an idea of the taxonomic composition of polychaete worms in the waters of Laspi Bay and can be useful for further monitoring of this area.Береговая зона бухты Ласпи (Крым, Черное море) является привлекательной для развития рекреационной деятельности, которая может негативно повлиять на состояние экосистемы бухты и прилегающих к ней акваторий. Цель исследования – оценка современного состояния полихет, обитающих на рыхлых грунтах литорали и сублиторали бухты Ласпи. В 2016–2019 гг. в акватории бухты исследована фауна полихет. Сборы макрозообентоса выполнены в 84-м, 86-м, 96-м, 108-м рейсах НИС "Профессор Водяницкий" и в прибрежных сборах. Всего выполнено 89 проб (19 глубоководных, 70 прибрежных). В акватории бухты Ласпи идентифицировано 45 видов полихет. Их средняя численность составила 2 368 ± 467 экз./м2, средняя биомасса – 44,128 ± 13,919 г/м2. Существенный вклад в формирование данных показателей вносит Terebellides stroemii. Ранжированный ряд по индексу плотности возглавляют T. stroemii, Nephtys hombergii и Melinna palmata. Наибольшее количество видов отмечено на глубине 46 м, где грунт представлен песком (мелкий, крупный, заиленный) и галькой. Наибольшая численность отмечена на глубинах 93,5–98 м, основной вклад в общую численность вносит Prionospio сirrifera. Наибольшая биомасса зарегистрирована на глубинах 53,5–58 м, основной вклад в данный показатель вносит T. stroemii. В акватории бухты Ласпи зарегистрированы характерные виды – P. сirrifera и Micronephthys longicornis. Они встречены как на мелководье, так и на больших глубинах. К редким видам, обнаруженным только на одной станции, относятся 18 видов полихет. Полученные результаты дают представление о видовом составе и количественных характеристиках полихет, обитающих на рыхлых грунтах бухты Ласпи, и могут быть полезны для дальнейшего мониторинга этого района.PublishedReferee