Zooplankton and zoobenthos of the Mokra Sura river / Оцінка стану зоопланктону і зообентосу річки Мокра Сура
Journal Title: Рибогосподарська наука України - Year 2017, Vol 42, Issue 4
Abstract
Purpose. To study the spatial distribution of structural and functional indicators of zooplankton and zoobenthos during the period of maximum development of hydrobiocenosis in the contaminated and conditionally clean sites of the Mokra Sura river being under antropogenic pressure. Methodology. During the collection and subsequent laboratory processing of zooplankton and zoobenthos samples, we used the standard conventional hydrobiological methods. In order to rank the studied river sites, we used the combined index of the community state (CICS) based on the structural-functional indicators of zoobenthos. Findings. The research results have shown that the species composition of zoobenthos and zooplankton of the Mokra Sura river included many saprobiontic species such as oligochaetes, chironomids and rotifers, which were developed significantly in some sites under the effect of eutrophication and silt accumulation in the presence of anthropogenic pollution. The above-mentioned processes cause inhibition of the life activity of such filter feeders as mollusks and crustaceans being the most powerful zooplanktonic and zoobenthic agents of self-cleaning. The highest numbers of zooplankton and zoobenthos development were recorded in front of the point of the emergency discharge of right-bank sewage water (stimulating effect of organic pollution) while the lowest numbers were registered near the tire plant (combined effect of both chemical sewage pollution and silt accumulation). In the «Dnipro - Zaporizhzhia highway» site, low numbers of zooplankton development were the result of silt accumulation, whereas the zoobenthos biomass turned out to be the highest due to the intensive development of oligochaetes. Planktonic saprobiontic rotifers dominated in the site located in front of the sewage discharge whereas bdelloid rotifers dominated in the upstream sites of the river. The dominance of planktonic and benthic saprobiontic rotifers caused the highest saprobity indices in these sites. According to CICS index, the sites of 3 km and 2 km upstream from the river mouth were the purest ones as indicated by the greatest development of filter feeding crustaceans and the lowest indices of saprobity compared to the other sites studied. These results indicate a very effective biogenic detoxification and precipitation of toxic substances entering the river in the above-mentioned areas, as well as dilution effects of large water masses from the Dnieper River in the mouth areas of its tributaries Originality. For the first time, the ecological state of the selected sites of the Mokra Sura River was assessed on the basis of the results of a comprehensive study of the structural and functional indicators of zooplankton and zoobenthos during the maximum development of their hydrobiocenosis. Practical value. The obtained results can be used for hydroecological monitoring to detect the dangerous ecological state of small rivers and to prevent further degradation of the ecosystems of small rivers as well as for calculation of fish losses caused by sewage water effects.
Authors and Affiliations
V. Yakovenko, O. Fedonenko, N. Tushnytska
THE EFFECT OF FISH FEEDING WITH ADDITIVES NUPRO® AND BIO-MOS® ON THE RESULTS OF THE REARING OF AGE-1+ CARP (CYPRINUS CARPIO CARPIO) / ВПЛИВ ЗГОДОВУВАННЯ КОРМОВИХ ДОБАВОК NUPRO® І BIO-MOS® НА РЕЗУЛЬТАТИ ВИРОЩУВАННЯ ДВОЛІТОК КОРОПА (CYPRINUS CARPIO CARPIO)
Purpose. To investigate the effect of feed fish with the additives NUPRO® and BIO-MOS® on the results of the rearing of age-1+ carp (Cyprinus carpio L.). Methodology. The study of the effect of feeding fish with the add...
ICHTHYOFAUNA OF WATER BODIES OF THE NATIONAL NATURE PARK “TUZLA LAGOONS” AND ITS COMMERCIAL FISHERIES EXPLOITATION / ІХТІОФАУНА ВОДОЙМ НАЦІОНАЛЬНОГО ПРИРОДНОГО ПАРКУ «ТУЗЛІВСЬКІ ЛИМАНИ» І ЇЇ РИБОГОСПОДАРСЬКЕ ВИКОРИСТАННЯ
Purpose. To study of the current species diversity of fish fauna in the water bodies included in the National Park “Tuzla lagoons”, to assess the perspectives of their commercial fisheries exploitation. Methodology. Col...
ORGANOCHLORINE PESTICIDES IN FISH OF THE KILIYA DELTA OF THE DANUBE (2003–2005) / ХЛОРОРГАНІЧНІ ПЕСТИЦИДИ У РИБАХ КІЛІЙСЬКОЇ ДЕЛЬТИ ДУНАЮ (2003–2005 РР.)
Purpose. Identification and analysis of the content of organochlorine pesticides (OCP) in organs and tissues of benthivorous and predatory fish species of the Kiliya delta of the Danube (Eastern mouth) and their comparis...
DEVELOPMENTAL STABILITY AND CYTOGENETIC HOMEOSTASIS OF FISH FAUNA OF THE SLUCH RIVER IN CURRENT CONDITIONS OF ANTHROPOGENIC STRESS / СТАБІЛЬНІСТЬ РОЗВИТКУ ТА ЦИТОГЕНЕТИЧНИЙ ГОМЕОСТАЗ ІХТІОПОПУЛЯЦІЙ РІЧКИ СЛУЧ У СУЧАСНИХ УМОВАХ АНТРОПОГЕННОГО НАВАНТАЖЕННЯ
Purpose. To assess the developmental stability and cytogenetic homeostasis of fish populations in the Sluch River in the watercourse areas subjected to anthropogenic stress of different intensities. Methodology. Studies...
Characteristics of phytoplankton in the Zaporizhzhia reservoir for the period of its existence (review) / Характеристика фітопланктону Запорізького водосховища за період існування (огляд)
Purpose. Based of literature data, in chronological order, to compose a list of leading scientists who investigated phytoplankton in the middle part of the River Dnipro, which, after the construction of the Dniprostan da...