Engures ezera vasaras fitoplanktons (2013-2017)
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Latvijas Universitāte
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lav
Abstract
Darba mērķis ir noskaidrot fitoplanktona sabiedrību un to veidojošo sugu sastāva īpatnības, tā ietekmējošos faktorus, kā arī eitrofikācijas pazīmes Engures ezerā laika posmā no 2013. – 2017. gadam. Tika noteikts fitoplanktona sugu taksonomiskais sastāvs, aprēķināta fitoplanktona biomasa un noteikti ūdens fizikāli – ķīmiskie parametri. Pētījumā tika secināts, ka ezeram raksturīgas zemas fitoplanktona biomasas. Lielāko ietekmi uz ezera ekoloģisko kvalitāti rada kormorānu kolonija, kas izmaina vietējo aļģu sabiedrības un strauji degradē mieturaļģu audzes. Atslēgas vārdi: fitoplanktons, vides faktori, eiglēnaļģes, kormorāni
The aim of this research is to find out phytoplankton community compositions, community structure and environmental factors affecting the diversity of phytoplankton, as well as eutrophication features in Lake Engure 2013 - 2017. Taxonomic composition of phytoplankton species and physicochemical parameters of water were established, phytoplankton biomass was calculated. Research concluded that low phytoplankton biomass is characteristic to the lake. Ecological quality of the lake is greatly influenced by cormorant colony, which change local algae communities and rapidly degrades growths of charophyte algae. Key words: phytoplankton, environmental factors, euglenophyta, cormorants.
The aim of this research is to find out phytoplankton community compositions, community structure and environmental factors affecting the diversity of phytoplankton, as well as eutrophication features in Lake Engure 2013 - 2017. Taxonomic composition of phytoplankton species and physicochemical parameters of water were established, phytoplankton biomass was calculated. Research concluded that low phytoplankton biomass is characteristic to the lake. Ecological quality of the lake is greatly influenced by cormorant colony, which change local algae communities and rapidly degrades growths of charophyte algae. Key words: phytoplankton, environmental factors, euglenophyta, cormorants.