Document of bibliographic reference 396512

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

Effects of variations in hydrological connectivity on the macrobenthic community structure in reclaimed wetlands

Abstract

The Nanhui Dongtan Wetland is the most extensively reclaimed part of the Yangtze River Estuary wetland. In recent decades, urbanization has led to the extensive reclamation of the intertidal wetlands of Nanhui Dongtan. Macrobenthos are crucial as secondary production groups in the food web. However, there is a lack of in-depth research on the response mechanisms of macrobenthic communities to environmental disturbances in reclaimed wetlands. This study investigated the impact of hydrological connectivity changes caused by land reclamation on the macrobenthic community based on the macrobenthic community composition in preserved tidal flats and closed and open reclamation areas in Nanhui Dongtan. The results showed that the macrobenthos species richness in the closed reclamation area was significantly lower than that in the other areas. After dividing the functional groups of macrobenthos, structural equation modeling revealed a negative correlation between the salinity and the functional group composition. Analysis of the food sources revealed significant positive corre?lations between predatory and sediment-feeding populations and sediment organic matter content, between detritivorous group and environmental chlorophyll-a content, and between herbivorous group and suspended organic matter content in water. Therefore, variations in hydrological connectivity in different reclamation areas caused differences in food source distribution, which led to different compositions of macrobenthic functional

Bibliographic citation

Du, X.; Huang, Y.; Ye, Y.; Zhou, Y.; Huang, J.; Zhu, B.; Li, Y.; Zhao, Y. (2024). Effects of variations in hydrological connectivity on the macrobenthic community structure in reclaimed wetlands. Sci. Total Environ. 954: 176111. https://dx.doi.org/10.1016/j.scitotenv.2024.176111

Is peer reviewed

true