Macrozoobenthos of the Estuary Areas of the Tributaries of the Rybinsk Reservoir

The structure and spatial distribution of macrozoobenthos in the mouth area of the small tributaries of the Rybinsk Reservoir, the Il’d, Syobla, Lam, and Yukhot rivers, was studied in different seasons, 2007–2008 and 2010–2011. The composition of the macrozoobenthos was identified: in the Il’d River...

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Veröffentlicht in:Inland water biology 2023-12, Vol.16 (Suppl 1), p.S130-S144
1. Verfasser: Perova, S. N.
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description The structure and spatial distribution of macrozoobenthos in the mouth area of the small tributaries of the Rybinsk Reservoir, the Il’d, Syobla, Lam, and Yukhot rivers, was studied in different seasons, 2007–2008 and 2010–2011. The composition of the macrozoobenthos was identified: in the Il’d River, 222 species and forms, in other studied rivers, 140. Most of the discovered species were larvae of chironomids and other amphibiotic insects. The highest species richness and diversity of macrozoobenthos was recorded in the free-flow zone, and its highest abundance was recorded in the free-flow zone and in the transition zone of the tributary of the river mouth area. A significant decrease in flow in the frontal zone of river mouths leads to a decrease in species richness (due to the loss of rheophilic fauna) and creates conditions favorable for the dominance of limnophilic species adapted to oxygen deficiency, bloodworm larvae and oligochaetes.
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identifier ISSN: 1995-0829
ispartof Inland water biology, 2023-12, Vol.16 (Suppl 1), p.S130-S144
issn 1995-0829
1995-0837
language eng
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source SpringerLink Journals
subjects Biodiversity
Biomedical and Life Sciences
Chironomidae
Estuaries
Estuarine dynamics
fauna
Freshwater & Marine Ecology
Geoecology/Natural Processes
Hypoxia
Insects
Larvae
Life Sciences
limnophilic species
Oligochaeta
Reservoirs
rheophilic species
River mouth
River mouths
Rivers
Spatial distribution
species
Species diversity
Species richness
Tributaries
title Macrozoobenthos of the Estuary Areas of the Tributaries of the Rybinsk Reservoir
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