scholarly journals Estimation of River Utroya Ecological State in Intensive Organic Pollution Area Using Plankton Communities ’ Characteristics (Pskov Region)

2015 ◽  
Vol 3 ◽  
pp. 62
Author(s):  
Diana Sudnitsina ◽  
Anna Cherevichko
Keyword(s):  
Species Composition ◽  
Organic Pollution ◽  
Ecological State ◽  
River Stretch ◽  
Pskov Region ◽  
Structural Indicators ◽  
Pollution Area ◽  
Zooplankton Communities ◽  
Plankton Communities

The changes in characteristics of phytoplankton and zooplankton communities in the river Utroya stretch with the active organic pollution were discussed. The paper shows the effects of pollution on the structural indicators of the communities (species composition, abundance, and biomass). Saprobical analysis was held. Assessment of ecological state of the river stretch was made.

scholarly journals Succession in rocky intertidal benthic communities in areas with different pollution levels at Guanabara Bay (RJ-Brazil)

2005 ◽  
Vol 48 (6) ◽  
pp. 951-965 ◽  
Author(s):  
André Breves-Ramos ◽  
Helena Passeri Lavrado ◽  
Andrea de Oliveira Ribeiro Junqueira ◽  
Sérgio Henrique Gonçalves da Silva
Keyword(s):  
Community Development ◽  
Species Composition ◽  
Benthic Communities ◽  
Organic Pollution ◽  
Polluted Area ◽  
Rocky Intertidal ◽  
Percent Cover ◽  
Guanabara Bay ◽  
Pollution Levels ◽  
Resilient Communities

The aim of this study was to describe and compare the succession of intertidal benthic communities in two areas at Guanabara Bay, RJ, Brazil: Urca, an area submitted to moderated organic pollution and Catalão, an extremely polluted area. Three transects in each area were scraped one month before the beginning of this study in order to evaluate the recruitment (recruitment-treatments). Three other transects were monitored without manipulation (monitoring treatments). Species composition and relative abundance were evaluated monthly between September and December, 2000. A total of 26 species was found at Urca and 13 at Catalão. The percent cover of the most abundant organisms was not similar between treatments at Urca after four months, while in Catalão, the similarity was 72% in the second month. The faster community development and recovery at the most polluted area was probably related to the existence of simple and resilient communities in more impacted areas.

Crustacean Plankton Communities in Forty-Five Lakes in the Experimental Lakes Area, Northwestern Ontario

1971 ◽  
Vol 28 (2) ◽  
pp. 231-244 ◽  
Author(s):  
Kazimierz Patalas
Keyword(s):  
Common Species ◽  
Medium Size ◽  
Experimental Lakes Area ◽  
Northwestern Ontario ◽  
Lake Morphology ◽  
Diaptomus Oregonensis ◽  
Crustacean Plankton ◽  
Limnocalanus Macrurus ◽  
Zooplankton Communities ◽  
Plankton Communities

Zooplankton communities were characterized on the basis of samples taken in summer as vertical net hauls in the central part of lakes. Twenty-eight species of crustaceans were found in the 45 lakes studied. The highest number of species as well as the highest numbers of individuals (per unit of area) usually occurred in the largest deepest lakes with most transparent water.The most common species were: Bosmina longirostris, Tropocyclops prasinus mexicanus, Mesocyclops edax, Diaptomus minutus, Holopedium gibberum, and Cyclops bicuspidatus thomasi. Daphnids were rather scarcely represented.Senecella calanoides, Limnocalanus macrurus, and Diaptomus sicilis were confined to rather deeper lakes, whereas Diaptomus oregonensis was found mostly in smaller shallower lakes and Diaptomus leptopus in very small, but relatively deep lakes. Diaptomus minutus and C. b. thomasi, though widely distributed, showed a preference for deeper lakes, whereas T. p. mexicanus tended towards smaller shallower lakes.In particular lakes, the number of dominants ranged between 1 and 5, but three dominants per lake was the most commonly encountered case. The simplest community was composed of one cyclopoid, though the most common consisted of one cyclopoid, one diaptomid, and one cladoceran.Four types of communities were distinguished, each of them characteristic for a group of lakes of specific size and depth: (I) in the largest and deepest lakes (389–1007 ha of area, 30–117 m maximum depth); (II) in lakes of medium size and depth (6.5–200 ha, 4.8–33 m); (III) in small and very shallow lakes (3.1–28 ha, 2.7–7.3 m); (IV) in very small lakes with medium depth (1.3–3.7 ha, 6.1–12.8 m).The high degree of similarity between the plankton communities of the Experimental Lakes Area (ELA) and southern Ontario, as well as of some Great Lakes, suggest that they all basically belong to the same zoogeographical area.The fact that most species were distributed evenly throughout ELA may indicate the relative uniformity of the area. In ELA, lake morphology is mainly responsible for defining the type of community.

scholarly journals The Role of Planktonic Algae in the Ecological Assessment of Storage-Reservoirs of the ILI-Balkhash Basin

2018 ◽  
Vol 20 (2) ◽  
pp. 1-14 ◽  
Author(s):  
Sophia Barinova ◽  
Elena Krupa ◽  
Sophia Romanova
Keyword(s):  
Aquatic Ecosystems ◽  
Nutrient Loading ◽  
Algal Cell ◽  
Cell Mass ◽  
Organic Pollution ◽  
Shannon Index ◽  
Storage Reservoirs ◽  
Phytoplankton Communities ◽  
Plankton Communities

Abstract The largest wastewater treatment systems include Sorbulak and Kurty reservoirs, and the small storage ponds were studied in the summer of 2017 and characterized mainly by organic pollution. Phytoplankton communities were represented by species tolerant of organic and toxic pollution. Cyanobacteria dominated in the reservoirs, and dinophyte algae were only in the Kurty Reservoir. According to the results of CCA analysis, only Cr and certain nutrients had a significant effect on the abundance of algae. A statistically positive significant association between the Shannon index and the average algal cell mass was established. The results obtained are a particular example reflecting the non-linearity of changes in plankton communities in the gradient of nutrient loading and eutrophication of aquatic ecosystems.

Crustacean Plankton of 146 Alpine and Subalpine Lakes and Ponds in Western Canada

1971 ◽  
Vol 28 (3) ◽  
pp. 311-321 ◽  
Author(s):  
R. Stewart Anderson
Keyword(s):  
Species Composition ◽  
National Parks ◽  
Copepod Species ◽  
Physical Factors ◽  
Western Canada ◽  
Cladoceran Species ◽  
Subalpine Lakes ◽  
Crustacean Plankton ◽  
Large Predators ◽  
Plankton Communities

Investigations of crustacean plankton communities in 146 alpine and subalpine waters in some western Canadian national parks and environs showed that species composition varied little from year to year and that there was a mean of 2.93 species per community Diaptomus arcticus occurred in 60% of the communities. More cladoceran species than copepod species were found, but there were usually more copepod than cladoceran species in a community. Many of the species found in subalpine waters did not occur in alpine waters, where they were probably limited more by physical factors — such as temperature and morphometry — and the presence of large predators than by altitude. Except for anostracans, few species seemed to be restricted to either lakes or ponds in the study area. Congeneric occurrences of large cladocerans or nonpredaceous diaptomid copepods were uncommon, as were co-occurrences of large cladocerans and nonpredaceous diaptomids.

scholarly journals Were there any changes in zooplankton communities due to the limitation of restoration treatments?

2021 ◽  
Vol 21 (2) ◽  
pp. 91-104
Author(s):  
Joanna Rosińska ◽  
Katarzyna Kowalczewska-Madura ◽  
Anna Kozak ◽  
Wanda Romanowicz-Brzozowska ◽  
Ryszard Goldyn
Keyword(s):  
Water Quality ◽  
Species Composition ◽  
Trophic State ◽  
Species Number ◽  
Trophic State Index ◽  
Keratella Cochlearis ◽  
Bottom Waters ◽  
Phosphorus Inactivation ◽  
State Index ◽  
Zooplankton Communities

Abstract Zooplankton is a good indicator of water quality state. Analysing the species composition and abundance, it is possible to assess the condition of the water body and predict the direction of changes. The aim of the study was to analyse the zooplankton in a shallow urban lake, in which restoration was limited to one method, i.e. wind-aeration. The results were compared with the earlier data obtained during sustainable restoration (three methods: wind-aeration, phosphorus inactivation, biomanipulation) and before the restoration period. The zooplankton was sampled monthly in 2015 and 2016 in the deepest place of the lake from the surface to the bottom. The trophic state was determined based on rotifer trophic state index for lakes (TSIROT). Although the species composition of zooplankton communities varied very little among the restoration periods (Keratella cochlearis f. tecta mainly dominated), significant changes in the abundance of zooplankton were found in the analysed lake. The maximum of total abundance was noted in 2015, almost 5500 ind. L−1, and in the next year its decrease was almost 3-fold, to ca. 1800 ind. L-1. Based on TSIROT, the water was still eutrophic. Leaving only one method of restoration (namely, oxygenation of the bottom waters) proved insufficient to support the development of crucial organisms as cladocerans. The changes in the abundance could have resulted more from seasonal changes than from the effects of aeration. A reduction in species number and maintaining a high proportion of rotifers typical for a high trophic state indicated a return of the ecosystem to its pre-restoration state. High variability in the rotifer abundance indicated a continuous imbalance of the ecosystem. Previous restoration treatments using several methods simultaneously showed better effectiveness. The change of strategy of restoration before obtaining a stable improvement of water quality destroyed previously achieved effects.

scholarly journals Evaluarea stării comunităților zooplanctonice în condițiile schimbării mediului acvatic

2021 ◽  
Author(s):  
Liubovi Lebedenco ◽  
Keyword(s):  
Species Composition ◽  
Aquatic Environment ◽  
Hydrological Regime ◽  
Climatic Conditions ◽  
The Other ◽  
Research Results ◽  
Quantitative Parameters ◽  
The Status ◽  
The One ◽  
Zooplankton Communities

This paper presents research results on the assessment of the status of zooplankton communities under the conditions of changing aquatic environment of the Dniester and Prut Rivers. The current climatic conditions have contributed to the change of the hydrological regime of the investigated ecosystems. The influence on zooplankton was manifested on the one hand by restructuring the species composition and disturbances in quantitative parameters, and on the other hand by increasing the density of zooplankton communities during the study year.

Microphytobenthos as an indicator of water quality and organic pollution in the western coastal zone of the Sea of Azov

2019 ◽  
Vol 48 (2) ◽  
pp. 125-139 ◽  
Author(s):  
Sophia Barinova ◽  
Anna Bondarenko ◽  
Larisa Ryabushko ◽  
Sergey Kapranov
Keyword(s):  
Water Quality ◽  
Species Composition ◽  
Eastern Mediterranean ◽  
Organic Pollution ◽  
The Sea Of Japan ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
Kerch Strait ◽  
Water Ph ◽  
Seawater Quality

AbstractBioindication of organic pollution and seawater quality was carried out for the first time in the western part of the Sea of Azov on the basis of species composition and quantitative characteristics of microphytobenthos. A total of 229 algal samples were collected at 17 sites over the period of 2005-2014 on three different substrates in three areas under study: Sivash Gulf, the Kerch Strait and Cape Kazantip. In total, 200 taxa of algae were found, which belong to six taxonomic divisions with a predominance of diatoms. Among those, 108 taxa are indicators of substrate, water temperature, salinity, water pH, trophic state, the type of nutrition and organic pollution of water. It has been shown that the most active self-purification of water takes place in communities on stony substrates. The largest number of algae species (50%) occurs in the cleanest waters of the Kazantip Nature Reserve (Water Quality Classes I–II). The species composition of organic pollution indicators in Sivash Gulf corresponds to waters of Classes III–IV, which are more polluted than those of the Kerch Strait and Cape Kazantip. All the studied areas of the Sea of Azov are cleaner compared to some waters of the Eastern Mediterranean and the Sea of Japan.

scholarly journals Change in species composition of vegetation on various-aged set-aside lands of the Volga Delta

2020 ◽  
Vol 164 ◽  
pp. 07015
Author(s):  
Artem Sokolov ◽  
Galina Sokolova ◽  
Shamil Bairambekov ◽  
Tamara Boeva
Keyword(s):  
Species Composition ◽  
Growth And Development ◽  
Ecological State ◽  
Volga Delta ◽  
Perennial Plants ◽  
Species Composition Of Vegetation ◽  
Long Time ◽  
Wet Weight ◽  
Large Families ◽  
Study Species

The object of the present research is set-aside lands of various ages. The study was aimed to identify the main biological groups of weed growing on set-aside lands of the Volga Delta, which were removed from production in different years. Within the study, species composition of set-aside lands’ vegetation was defined, which amounted to 28 species and 16 families. The plant community of set-aside lands includes such large families as Asteraceae (5 species), Poaceae (4 species), Brassicaceae (3 species). It was observed that quantitative species composition of set-aside lands’ flora has been changing depending on its age: the older a set-aside land is, the less species grow there. In spring and summer seasons, ephemeral, annual and biennial weeds prevailed, while in autumn perennial plants did: the latter were estimated of 75-80%, their wet weight amounted up to 70-92% of total weight due to the plentiful growth and development of a perennial rhizome plant named Phragmites australis (Cav.) Trin. ex Steudel. The research has lasted for 10 years and allowed observing a 14-32% increase in a number of plants belonging to a xerophyte group on longstanding set-aside lands with low level of soil moisture. Agro-ecosystems of various-aged set-aside lands hosted the development of flora having different vegetative weight that is capable of accumulating solar energy. Significant amount of accumulated energy reduced the entropy of the environment and improved its ecological state. On an old-aged set-aside land, corps of perennial plants vegetating for a long time have been maximally accumulating energy and gained 25712.42 MJ/ha.

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