SPECIES DIVERSITY OF PLANKTONIC ROTIFERS IN LOTIC ECOSYSTEMS: A CASE OF STUDY OF DANUBE, SFANTU GHEORGHE BRANCH

2017 ◽  
Vol 16 (2) ◽  
pp. 275-284
Author(s):  
Mirela Moldoveanu ◽  
Larisa Florescu
Keyword(s):  
Species Diversity ◽  
Lotic Ecosystems ◽  
Planktonic Rotifers

scholarly journals Zooplankton diversity in Acre state, Amazon, Brazil: an overview of previous studies

2022 ◽  
Vol 22 (1) ◽  
Author(s):  
Larissa Araújo dos Santos ◽  
Andressa Crystine Souza da Silva ◽  
Pedro Paulo Pereira ◽  
Ronnilda Maria Gonçalves Araujo ◽  
André Ricardo Ghidini
Keyword(s):  
Aquatic Ecosystems ◽  
Current Knowledge ◽  
Amazon Region ◽  
The State ◽  
Lotic Ecosystems ◽  
Lack Of Information ◽  
Littoral Zones ◽  
Planktonic Rotifers

Abstract: This work assesses current knowledge of zooplankton biodiversity in aquatic ecosystems of the state of Acre (Brazil). A bibliographic survey was undertaken, showing that most of the reported studies have focused on zooplankton diversity and composition. Fifteen locations have been studied. There is still a scarcity of information concerning zooplankton populations in the Amazon region. To date, 170 species of planktonic rotifers have been recorded, distributed in 26 families and 38 genera, together with 18 species of cladocerans, distributed in 8 families and 18 genera, and 4 species of copepods in 2 families and 6 genera. The results indicate the need for further research concerning the biodiversity of this group of organisms at locations in the basins of the Purus and Juruá Rivers, especially in lotic ecosystems and littoral zones, given the present lack of information and the socioeconomic importance they play in the region.

Diatoms in the Early Valdai (Weichselian) sediments in Lake Ladoga basin

2019 ◽  
pp. 225-228
Author(s):  
Anna V. Ludikova
Keyword(s):  
Species Diversity ◽  
High Energy ◽  
Lake Ladoga ◽  
Diatom Assemblages ◽  
Marine Diatoms ◽  
Selective Preservation

The pioneer diatom study of the Early Weichselian (Valdai) sediments in Lake Ladoga basin was performed. The specifics of the diatom assemblages (co-occurrence of ecologically incompatible taxa, poor species diversity, low diatom concentration and selective preservation) suggest that during the Early Weichselian time intense erosion of previously deposited marine Eemian (Mikulino) sediments prevailed, which resulted in re-deposition of marine diatoms. The sedimentation took place in high-energy environments unfavorable for diatom accumulation and preservation.

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