JOURNAL OF NATURAL RESOURCES ›› 2019, Vol. 34 ›› Issue (12): 2544-2553.doi: 10.31497/zrzyxb.20191205

• Special Forum of "Wetland" • Previous Articles     Next Articles

Influence of hydrological connectivity of coastal wetland on the biological connectivity of macrobenthos in the Yellow River Estuary

WANG Xin-yan(), YAN Jia-guo, BAI Jun-hong, CUI Bao-shan()   

  1. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
  • Received:2019-03-10 Revised:2019-06-13 Online:2019-12-28 Published:2019-12-28

Abstract:

Coastal wetland is the transitional area between land and sea, with high habitat complexity, species biodiversity and ecological service functions. However, due to the influence of human activity and climate change, the areas of the wetlands are gradually reduced, and the structure and functions of wetlands such as hydrological connectivity are greatly influenced. In the present work, we selected three typical tidal channels with obvious differences in hydrological connectivity, investigated the macrobenthos community between different tidal channels and analyzed the influence of longitudinal hydrological connectivity on the distribution and diversity (density, biomass and biodiversity) of macrobenthos. A total of 52 species were documented, and the numerically abundant taxonomic groups were Polychaeta and Mollusca; Overall, with the increase of hydrological connectivity, the total density of macrobenthos showed an upward trend; the areas with moderate hydrological connectivity tended to have a higher biodiversity; different groups of macrobenthos showed different density and distribution responding to environmental factors caused by hydrological connectivity; Polychaeta and Oligochaeta were dominant in areas with low hydrological connectivity and Mollusca were dominant in areas with high hydrological connectivity and abundant nutrients; Crustacea were dominant in areas close to the channel source with the highest hydrological connectivity. This study is helpful to understand the mechanism of wetlands hydrological connectivity on biological connectivity, and provide an important reference for the protection and restoration of coastal wetlands.

Key words: coastal wetland, hydrological connectivity, macrobenthos, biological connectivity