scholarly journals Seasonal dynamics of phytoplankton in two warm temperate reservoirs: association of taxonomic composition with temperature

2006 ◽  
Vol 28 (1) ◽  
pp. 1-17 ◽  
Author(s):  
James P. Grover ◽  
Thomas H. Chrzanowski
Keyword(s):  
Seasonal Dynamics ◽  
Taxonomic Composition ◽  
Warm Temperate

The state of phytoplankton in the Taganrog Bay and factors determining its development in 2017

2020 ◽  
pp. 69-73
Author(s):  
Lyudmila G. Korneva ◽  
Galina Yu. Glushchenko
Keyword(s):  
Organic Matter ◽  
Seasonal Dynamics ◽  
General Structure ◽  
Taxonomic Composition ◽  
Sea Of Azov ◽  
Don River ◽  
The Stability ◽  
High Level ◽  
Taganrog Bay ◽  
Qualitative Changes

The work presents the results of a study of phytoplankton in Taganrog Bay of the Sea of Azov and the downstream reaches of the Don River (January, April – November 2017). During the study was identified the modern taxonomic composition (210 species of eukaryotic algae and cyanobacteria). Ecological and geographical analysis was showed the stability of the general structure of the plankton algoflora of the studied area compared with previous years of the study (1980s to early 2000s). The work also presents a characteristic of the seasonal dynamics of taxonomic, size structures, and coenotic composition of phytoplankton. During the study was noted the temporary and qualitative changes in composition of phytoplankton, which are indicate a high level of organic matter in the studied reservoirs and an increase in the heterotrophic component in the functioning of the Lower Don ecosystem. It was found that in the studied water bodies the important factor in the formation of composition and the structure of phytoplankton is salinity.

Formation features of phytoplankton of the Bolshaya river (Omsk region) in the zoo's influence zone

2021 ◽  
pp. 131-134
Author(s):  
Olga P. Bazhenova ◽  
Svetlana V. Gontarenko
Keyword(s):  
Seasonal Dynamics ◽  
Trophic Status ◽  
Taxonomic Composition ◽  
Influence Zone ◽  
Dynamics Of Abundance ◽  
Quality Class ◽  
Zone Of Influence ◽  
High Level

According to the results of processing phytoplankton samples taken in 2018–2019 on the Bolshaya River (Omsk Region), the taxonomic composition of phytoplankton, its number and biomass were established in the zone of influence of the Bolsherechensky Zoo. As part of the phytoplankton, 183 species and intraspecific taxa from 8 divisions were identified. Seasonal dynamics of abundance of river phytoplankton and its changes in zone of zoo influence were investigated. In summer, a high level of phytoplankton development and «flowering» of water caused by Aphanizomenon flos-aquae are observed in the river on the territory of the zoo. In the formation of the number and biomass of phytoplankton, a significant share belongs to Chrysophyta and Euglenophyta. The trophic status of the Bolshaya River corresponds to the category of eutrophic waters. In autumn and summer, water in the river corresponds to the 3rd quality class of «satisfactory purity».

scholarly journals Taxonomic composition and seasonal dynamics of meroplankton in the area of mussel-oyster farm (Sevastopol, Black Sea)

2017 ◽  
Vol 2 (4) ◽  
pp. 38-49
Author(s):  
E. V. Lisitskaya
Keyword(s):  
Benthic Invertebrates ◽  
Seasonal Dynamics ◽  
Water Layer ◽  
Taxonomic Composition ◽  
Species Number ◽  
Sevastopol Bay ◽  
Negative Effect ◽  
Oyster Farm ◽  
Veliger Larvae ◽  
Associated Species

Organizing mussel-oysters farm, it is necessary to take into account data about dynamics of the number of cultivated objects and associated species that either facilitate formation of species community at collectors or may adversely affect the quality and quantity of expected product. Monitoring of meroplankton in aquatory of mussel-oysters farm located in outer harbor of Sevastopol Bay was performed in 2014–2017. Material was collected daily with Juday net (input hole diameter is 36 cm, mesh aperture is 135 μm). A water layer from bottom to surface (10–0 meters) was examined. Live material was treated by total calculation of larvae number in Bogorov chamber with binocular MBC-9. Larvae of 62 species of benthic invertebrates, including 9 species of Bivalvia, 15 species of Gastropoda, 19 species of Polychaeta, 2 species of Cirripedia, 12 species of Decapoda and 5 species of other taxonomical groups, were identified. Taxonomic composition of meroplankton depended on reproduction periods of benthic invertebrates and changed seasonally. From December to February the quantity of meroplankton was not more than 195 specimens per cubic meter, the number of species was 6. The increase of species number and quantity of larvae was observed from July to September. Maximal quantity of meroplankton was recorded in August, 2014. The seasonal dynamics of quantity of mussel larvae Mytilus galloprovincialis Lamarck, 1819 and potential cultivated object, inflated ark Anadara kagoshimensis (Tokunaga, 1906), was studied. Larvae of M. galloprovincialis were observed in plankton from September to May. They were not found in summer months. The increase of their number was recorded in April, and in September and October. Winter spawning of mussels was observed in December and January at 8.0–8.9 °С water temperature. Larvae of inflated ark A. kagoshimensis were observed from July to November, and their number significantly increased in September. Data for the occurrence of larvae of invertebrates, which have a negative effect on cultivated mollusks, have been given. Veliger larvae of carnivorous gastropoda Rapana venosa (Valenciennes, 1846) were observed from July to October. Larvae of polidora-perforator Polydora websteri Hartman in Loosanoff & Engle, 1943 were observed from June to October. Larvae of polychaeta Hydroides dianthus (Verril, 1873) were recorded in October. Nauplius larvae of barnacke Amphibalanus improvisus Darwin, 1854 were observed throughout the year. Their number was increasing from March to July, and in October and November. Planning hydraulic engineering works in mussel-oysters farm, it is necessary to take into account a period of presence of larvae in plankton.

MULTI-ANNUAL AND SEASONAL DYNAMICS OF THE TAXONOMIC COMPOSITION OF CYANOBACTERIA AND ALGAE IN SOME CAVES OF RUSSIA

2020 ◽  
Vol 68 ◽  
pp. 111-120
Author(s):  
Sh.R. Abdullin ◽  
Keyword(s):  
Seasonal Dynamics ◽  
Taxonomic Composition ◽  
Similar Species ◽  
Anthropogenic Influence ◽  
Significant Change ◽  
Cyanobacteria And Algae

The multi-annual and seasonal dynamics of the taxonomic composition of cyanobacteria and algae in a number of caves in Russia differing in origin, lying rocks, morphology, level of anthropogenic influence (Shulgan-Tash, Kinderlinskaya, Pervaya Chekan-Tamakskaya, Dudkinskaya shtolnya) are analyzed. It was revealed that in different years and seasons there is a significant change in the taxonomic composition of cyanobacteria and algae. The reason for this may be influational water or anthropogenic influence. At the same time, groups of similar species are observed that occur constantly.

scholarly journals Seasonal dynamics of Anaplasma spp. in goats in warm-temperate zone of China

2021 ◽  
Vol 12 (3) ◽  
pp. 101673
Author(s):  
Kunlun Wang ◽  
Yaqun Yan ◽  
Yongchun Zhou ◽  
Shanshan Zhao ◽  
Fuchun Jian ◽  
...  
Keyword(s):  
Seasonal Dynamics ◽  
Temperate Zone ◽  
Warm Temperate Zone ◽  
Warm Temperate

Seasonal dynamics of climatic indices as one of the manifestation factors of pyrogenic phenomena on the territory of Lugansk region

2014 ◽  
Vol 25 (1-2) ◽  
pp. 101-107
Author(s):  
I. A. Tarakhkalo
Keyword(s):  
Seasonal Dynamics ◽  
Climatic Factors ◽  
Service Firms ◽  
Climatic Indices ◽  
Specific Influence

The analysis on the effects of pyrogenic Lugansk region for the period from 2001 to 2005 was conducted using the service «FIRMS». Established seasonal dynamics of pyrogenic phenomena and specific influence of climatic factors on the pyrogenic effects in the Luhansk region.

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