scholarly journals The changes in the number and physiological properties of fungi in lakes differing in trophicity

2014 ◽  
Vol 29 (1) ◽  
pp. 33-42 ◽  
Author(s):  
Teresa Korniłłowicz
Keyword(s):  
Littoral Zone ◽  
Eutrophic Lake ◽  
Frequency Of Occurrence ◽  
Mesotrophic Lake ◽  
Physiological Properties ◽  
Lake Waters

U was demonstrated that the fungi decomposing protein were most abundant in tbe mesotrophic lake, whereas the fungi decomposing pectin dominated in the eutrophic lake. The accumulation of fungi mineralizing protein in littoral zone (metha- and hypolimnion of pelagial zone) of the mesotropbic lake indicated the increase in the fertility of this reservoir. The frequency of occurrence of physiologically differentiated mycoflora in the lake waters was seasonal and revealed fluctuations in their activity depending on the year of the study. These fluctuations were stronger in the mesotrophic lake.

scholarly journals The dynamics the quantitative changes of mycoflora in two lakes differing in trophicity (Poland). I.

2014 ◽  
Vol 29 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Teresa Korniłłowicz
Keyword(s):  
Littoral Zone ◽  
Eutrophic Lake ◽  
Saprophytic Fungi ◽  
Mesotrophic Lake ◽  
Annual Changes ◽  
Quantitative Changes

It was demonstrated that the number of saprophytic fungi in the population of plankton in mesotrophic lake changing to eutrophic (Lake Piaseczno) was mountained a similiar level (average values) as in the eutrophic one (Lake Głębokie). The seasonal and annual changes in the number of fungi in the waters of the lake with lower trophicity were markedly stronger than those in the lake with higher trophicity. In the mesotrophic lake this was connected with the intensity of phytoplankton development. The greatest accumulation of fungi occured in the waters of littoral zone in both lakes and in the pelagial metha- and hypolimniun of the Lake Piaseczno.

scholarly journals Comparison of the extraction methods of phycocyanin pigments in eutrophic lake waters

2014 ◽  
Vol 26 (5) ◽  
pp. 799-806 ◽  
Author(s):  
PANG Xiaoyu ◽  
◽  
DUAN Hongtao ◽  
ZHANG Yuchao ◽  
MA Ronghua
Keyword(s):  
Eutrophic Lake ◽  
Extraction Methods ◽  
Lake Waters

scholarly journals Desmids (Zygnematophyceae) from the littoral zone of an urban artificial lake: taxonomic aspects and geographical distribution

2018 ◽  
Vol 30 (0) ◽  
Author(s):  
Camila Akemy Nabeshima Aquino ◽  
Gabriela Medeiros ◽  
Jascieli Carla Bortolini ◽  
Cinthia Coutinho Rosa Favaretto ◽  
Douglas Ticiani ◽  
...  
Keyword(s):  
Species Composition ◽  
Geographical Distribution ◽  
Littoral Zone ◽  
New Records ◽  
Frequency Of Occurrence ◽  
Morphometric Characteristics ◽  
Ecological Studies ◽  
Artificial Lake ◽  
Qualitative Nature ◽  
Municipal Lake

Abstract Aim: The aim of this study was to assess the taxonomic aspects and geographical distribution of the periphytic desmids from two different substrates in the littoral zone of an urban artificial lake. Methods Samples of epiphytic and epilithic desmids were collected by grass and rock scraping, respectively, in two stations in the Cascavel municipal lake, Paraná, during April 2015, and March 2016 and 2017. In the laboratory, the taxa obtained from the samples were photographed and their morphometric characteristics recorded. The species composition of the desmid was characterized, and the frequency of occurrence as well as the geographic distribution of each taxon in the Paraná State were recorded. Results We identified 35 taxa, distributed in 10 genera. The most representative were Closterium Nitzsch ex Ralfs and Cosmarium Corda ex Ralfs. A high occurrence of sporadic taxa (60%) was observed and among the recorded taxa, the most frequent were Cosmarium pseudoconnatum Nordstedt var. pseudoconnatum and Desmidium grevillei (Kützing ex Ralfs) De Bary. Nine taxa were exclusive to the epilithic substrate and only Netrium digitus (Ralfs) Itzigsohn & Rothe var. digitus was exclusive to the epiphytic substrate, while the remaining 25 taxa occurred in both substrates. Seven taxa are new records for the Paraná State. Conclusion Although our results are of qualitative nature, they provide baseline data on the biogeographic distribution of taxa, which are crucial for future taxonomic and ecological studies that might contribute to the preservation of the biodiversity.

Suprabenthic amphipods from the littoral zone of Barlovento, Venezuela: spatial distribution and seasonal variation

Crustaceana ◽  
2013 ◽  
Vol 86 (10) ◽  
pp. 1206-1223 ◽  
Author(s):  
I. Ortega ◽  
A. Martin
Keyword(s):  
Environmental Variables ◽  
Littoral Zone ◽  
Abundant Species ◽  
Spatial And Temporal Variation ◽  
Total Density ◽  
Frequency Of Occurrence ◽  
Wood Debris ◽  
Density And Biomass ◽  
Amphipod Density ◽  
Common Variable

Peracarid crustaceans are a very diverse benthic group and one of the dominant taxa within the suprabenthic community. The Barlovento beaches in Venezuela are characterised by large inputs of organic matter and an important assemblage of amphipods has been observed to thrive in this area. In this paper we describe the species composition of this amphipod assemblage along with their spatial and temporal variation and relationship with some environmental variables on four beaches (Agua Sal, Los Timones, Las Cabañas, Valle Seco). Results showed no significant differences in the amphipod community structure and total density of organisms regardless of the season (rainy and dry). From the 7569 amphipods collected, a total of 20 species were identified within 14 families and 17 genera. The species Apohyale media (Dana, 1953), Metatiron tropakis (J. L. Barnard, 1972) and Nototropis minikoi (A. O. Walker, 1905) were the most abundant species in terms of density, and the last two also in terms of frequency of occurrence. Differences in biomass were not significant at any level (season, beach and their interactions); however, the highest amphipod biomass throughout the year was observed at Valle Seco Beach with peaks in January, August and December coinciding with large accumulations of bryozoans and wood debris. Amphipod density and biomass had low correlation values with the environmental variables; the material caught in the suprabenthos net being the most common variable influencing the community.

Effects of restoration of emergent macrophytes on the benthic environment of the littoral zone of a eutrophic lake

2020 ◽  
Vol 155 ◽  
pp. 105960
Author(s):  
Megumu Fujibayashi ◽  
Fumiaki Takakai ◽  
Shuhei Masuda ◽  
Kunihiro Okano ◽  
Naoyuki Miyata
Keyword(s):  
Littoral Zone ◽  
Eutrophic Lake ◽  
Emergent Macrophytes ◽  
Benthic Environment

Comparison of gastrotrich fauna on elodeids and in bottom sediments of lakes of different trophic status (the region Polesie Lubelskie, Eastern Poland)

2011 ◽  
Vol 40 (2) ◽  
Author(s):  
Teresa Nesteruk
Keyword(s):  
Species Diversity ◽  
Bottom Sediment ◽  
Bottom Sediments ◽  
Trophic Status ◽  
Vegetation Type ◽  
Eutrophic Lake ◽  
Diversity Indices ◽  
Eutrophic Lakes ◽  
Epiphytic Fauna ◽  
Mesotrophic Lake

AbstractSpecies diversity of gastrotrich communities on elodeids and in bottom sediments of lakes of different trophic status was compared. Thirty-eight species of Gastrotricha (34 in bottom sediment and 21 on elodeids) were found, which belong to the only family of Chaetonotidae Zelinka, 1889. Species diversity of both habitats was reflected in the diversity indices ranging from 2.02 (a dystrophic lake) to 2.67 (a strongly eutrophic lake) for bottom sediment, and from 2.01 (a mesotrophic lake) to 2.54 (a strongly eutrophic lake) for elodeids. The similarity of gastrotrich fauna from the two habitats was low, and varied from 17% (a mesotrophic lake) to 38% (a strongly eutrophic lake). Low similarity of elodeid fauna from lakes of different trophic status was also found, in spite of similar plant species composition. The lowest similarity in elodeid fauna (23%) was recorded for dystrophic and mesotrophic lakes, whereas the highest one (68%) was observed for eutrophic and strongly eutrophic lakes. That allows to conclude that the diversity of epiphytic fauna is affected by trophic status rather than by vegetation type. The comparison of the gastrotrich fauna from elodeids and bottom sediments in lakes of different trophic status provides additional autoecological characteristics of Heterolepidoderma ocellatum (Mečnikow, 1865) and allows to recognize this species as belonging to a group of species closely related to macrophytes.

scholarly journals Changes in species composition and physiological activity of fungi associations in two lakes, differing in trophicity

2014 ◽  
Vol 30 (2) ◽  
pp. 233-253
Author(s):  
Teresa Korniłłowicz
Keyword(s):  
Species Composition ◽  
Bottom Sediments ◽  
Physiological Activity ◽  
Eutrophic Lake ◽  
Cladosporium Herbarum ◽  
Mesotrophic Lake

The results of the present study indicated differences in species composition and physiological activity of saprophytic mycoflora between two lakes: mesotrophic lakę with accelerated eutrophication and an eutrophic one. In waters of the lake with lower trophicity the most frequently occurring species were <i>Hyalodendron</i> sp. and <i>Verticilliun lecani. These fungi prevailed in the total mycoflora and mycoflora decomposing proteins. The waters of the lake with higher trophicity are dominated by the population of V. lecani<,i>, which was proteolitically and pectinolytically active. In bottom sediments the following ubiquistic species were most common: <i>Cladosporium herbarum</i> (mesotrophic lake) and <i>Cephalosporium roseum</i> ( eutrophic lake).

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