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OALib Journal期刊
ISSN: 2333-9721
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长江江苏段底栖动物群落结构与多样性分析
DOI: 10.3724/SP.J.1145.2014.06007, PP. 96-100
Keywords: 长江,江苏,底栖动物群落,多样性,影响因素
Abstract:
底栖动物是长江水生生态系统的重要组成部分，研究其结构域和多样性对长江水资源开发和保护具有重要意义.分别于2013年5月和9月对长江干流江苏段17个采样点底栖动物群落结构和生境状况进行调查，并用shannon-wiener多样性指数对底栖动物多样性进行评价，用聚类法分析采样点底栖动物群落相似性.结果显示：17个采样点共采集到底栖动物36种，其中南京和常州段底栖动物平均密度较高，其他区域平均密度较低.多样性分析结果表明，南京和常州段底栖动物多样性较高，优势种为齿吻沙蚕（nephthyssp.）、大螯蜚属一种（grandidierellachaohuensissp.）、钩虾属一种（gammarussp.）、颤蚓属一种（tubifexsp.）和霍甫水丝蚓（limnodrilushoffmeisteri）；南通段底栖动物多样性最低，优势种为颤蚓属一种（tusbifexsp.）.聚类分析将17个采样点分为4组，相似性分析检验表明各聚类组底栖动物群落具有显著差异（p<0.05）.本研究表明，水生植被、流速、底质类型和航道可能是影响底栖动物群落结构重要原因之一.
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