School of Life Science, East China Normal University, Shanghai 200241, China.
School of Life Science, East China Normal University, Shanghai 200241, China.
Mar Pollut Bull. 2014 Dec 15;89(1-2):259-266. doi: 10.1016/j.marpolbul.2014.09.051. Epub 2014 Oct 13.
In this study, intertidal macrobenthic diversity in protected, disturbed, and newly formed wetlands of Yangtze estuary was assessed using PRIMER 5.2 based on species diversity and species relatedness. We observed high diversity in nature reserves and low diversity in adjacent disturbed and newly formed wetlands. These diversity data were then integrated with historical data to detect the variation in macrobenthic diversity over the past two decades. The integrated data indicated that the intertidal macrobenthic diversity sharply decreased in heavy reclamation tidal flats whereas markedly increased in non-disturbed nature reserve and newly formed wetland. Benthic health was observed with the departure degree of average taxonomic distinctness (Δ(+)) and variation in taxonomic distinctness (Λ(+)) from the simulated 95% confidence funnel. All the habitats were subjected to different levels of human interference, except Jiuduansha and Beigangbeisha. The degradation of intertidal wetland in Yangtze estuary was mainly attributed to land reclamation, overgrazing, and overfishing.
本研究采用 PRIMER 5.2 软件，基于物种多样性和物种相关性，评估了长江口保护区、干扰区和新形成湿地的潮间带大型底栖动物多样性。我们观察到自然保护区的多样性较高，而相邻的干扰区和新形成湿地的多样性较低。这些多样性数据与历史数据相结合，检测了过去二十年中大型底栖动物多样性的变化。综合数据表明，在大规模围垦滩涂中，潮间带大型底栖动物多样性急剧下降，而在未受干扰的自然保护区和新形成的湿地中则显著增加。通过平均分类差异（Δ（+））和分类差异（Λ（+））与模拟 95%置信漏斗的偏离程度来观察底栖生物健康状况。除九段沙和北港北沙外，所有栖息地都受到不同程度的人为干扰。长江口潮间带湿地的退化主要归因于围垦、过度放牧和过度捕捞。
