Pubblicazione scientifica

Fish assemblage changes over half a century in the Yellow River, China

FILONE TECNOLOGICO	TEMA
economia circolare e sostenibilità
produzione e raccolta
trasformazione e commercializzazione

RIASSUNTO

Abstract

Riverine environments have been threatened by anthropogenic perturbations worldwide, whereby their fish assemblages have been modified by habitat changes and nonendemic species invasions. We assessed changes in fish assemblages by comparing the species presence in historical and contemporary fish data in the Yellow River from 1965 to 2015. The temporal change in species assemblages was found with increased nonendemic species and fewer natives. Fish species richness of the river declined 35.4% over the past fifty years. Moreover, the decreased mean Bray–Curtis dissimilarity among reaches suggested that the fish assemblages of different reaches in the Yellow River were becoming more similar over time. However, temporal patterns of fish assemblages varied among reaches. In the upper Yellow River, higher species richness and more invasive species were found than those in the historical record, while the lower reaches experienced significant species loss. Dam constructions, exotic fish invasions, and flow reductions played the vital role in structuring the temporal fish assemblages in the Yellow River. It is suggested that river basins which experienced different types and levels of stressors by anthropogenic perturbations can produce varied effects on their temporal trends of species assemblages.

DATA

Data di pubblicazione: 30/03/2018

AUTORI

XIE JIA YAN
TANG WEN JIA
YANG YU HUI

ENTE DI AFFERENZA

Qinghai Eco‐environment Remote Sensing Monitoring Center Xining China
SCHOOL OF BIOLOGY & PHARM ENG WUHAN POLYTECHNIC UNIV WUHAN HUBEI CHINA

RIVISTA

Ecology and Evolution, 8(8), 4173-4182

IMPACT FACTOR

2,540

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