Document of bibliographic reference 396702

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

Comparative effects of river–lake disconnection on taxonomic and functional composition of molluscan assemblages in floodplain lakes

Abstract

Functional traits are promising features for biomonitoring in freshwater ecosystems. Here, we focused on 23 foodplain lakes to evaluate the responses of taxonomic and functional traits of freshwater mollusks to the loss of lateral hydrological connectivity (LHC). Our results revealed that the disconnected lakes (DLs) had signifcantly lower species richness of most functional trait categories of mollusks compared to the connected lakes (CLs). For percentages of species richness, only percentages of burrowers and thick-shelled species were signifcantly lower in DLs than CLs, while percentages of thin?shelled and small-sized species were higher in DLs. Therefore, there has been a shift toward assemblages with thin-shelled and small mollusks following LHC loss. We also found that key environmental variables afecting taxonomic and functional composition were connectivity, lake area, aquatic vegetable coverage, and water quality. Moreover, the functional composition of all Mollusca, Gastropoda, and Bivalvia were all better explained (explained variation ranged from 0.462 to 0.684) by environmental factors compacted with taxonomic composition (0.213–0.401). Connectivity was the most important factor afecting functional trait composition, whereas area was the most important variable for taxonomic composition. Thus, the trait-based approach based on mollusks was more sensitive in assessing the impacts of disconnection than the taxonomy-based approach.

Bibliographic citation

Zheng, P.; Jiang, X.; Shu, F.; Zhang, K.; Xiang, H.; Alahuhta, J.; Heino, J. (2024). Comparative effects of river–lake disconnection on taxonomic and functional composition of molluscan assemblages in floodplain lakes. Hydrobiologia 2024. https://dx.doi.org/10.1007/s10750-024-05677-1

Topic

Fresh water

Is peer reviewed

true