Abstract
The abundant estuarine wetlands supported by the complex river network in the Pearl River Delta are under intense anthropogenic influence, which threatens the local ecosystem. This paper examines the benthic macroinvertebrate diversity and abundance within the Pearl River Estuary through a field study. Fieldwork, based on the integral index of connectivity (IIC) of the wetland network, was carried out in the Pearl River Estuary. The responses of macroinvertebrate metrics to the integral connectivity gradient in the wetland network were examined. Statistical analyses (CCA) revealed that the benthic abundance in high-hydrological-connectivity riverine habitats was clearly distinct from that in low-connectivity habitats. Statistical analysis demonstrated that the diversity and abundance of the macrobenthos populations were determined by the integral connectivity of the wetland network. A non-linear model was developed to depict the relationship between macroinvertebrate diversity and network connectivity. Thus, conservation efforts in estuarine wetlands should focus on the macroinvertebrate diversity response in wetland patches with specific connectivity characteristics in the wetland network of the Pearl River Delta.
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Acknowledgments
The study was supported financially by the Key Project of National Natural Science Foundation of China (51639001), the National Science Foundation for Young Scientists of China (51709279, 51809287, 51909006), the Strategic Consulting Project of Chinese Academy of Engineering (2018-XZ-14), and the Key Project of National Natural Science Foundation (U1901212)。.
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PD, TX, BC and YL designed study; PD performed field and greenhouse experiment; PD and TX analyzed data; PD, TX and BC wrote the manuscript, and all authors contributed substantially to revisions.
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Dou, P., **e, T., Li, S. et al. A Network Perspective to Evaluate Hydrological Connectivity Effects on Macroinvertebrate Assemblages. Wetlands 40, 2837–2848 (2020). https://doi.org/10.1007/s13157-020-01320-6
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DOI: https://doi.org/10.1007/s13157-020-01320-6