新疆巴音布鲁克湿地沉积摇蚊记录对气候变化的响应

发布时间：2018-05-12 02:19

本文选题：摇蚊组合 + 底栖生境　；参考：《湖泊科学》2017年03期

【摘要】：基于新疆巴音布鲁克高寒湿地中一碟形洼地沉积岩芯210Pb测年、摇蚊、沉积理化指标分析结果,利用冗余分析,结合气象资料,探讨了近60 a来气候变化对摇蚊演替的影响.摇蚊亚化石组合表明,从1990s开始摇蚊优势种从适应性较强的Chironomus plumosus-type向与水生植物关系密切的Dicrotendips nervosus-type、Paratanytarsus penicillatus-type转变.冗余分析结果表明总有机碳含量和粒度是影响摇蚊组合演替的主要环境因子,两者共同解释了摇蚊组合变化的31%.气候变化通过改变湿地水量平衡影响水生植被、土壤侵蚀和水体扰动,进而影响摇蚊种群演替.
[Abstract]:Based on the results of 210Pb dating, Chironomus and sedimentary physical and chemical indexes, the effects of climatic change on the succession of Chironomus in the 210Pb dating of a disc depressions in the Xinjiang ba - blue high cold wetland, the analysis results of Chironomus and depositional physicochemical indexes were discussed. The combination of Chironomus subfossils showed that the dominant species of Chironomus from 1990s started from the stronger adaptive Chironom Us plumosus-type shifted to Dicrotendips nervosus-type and Paratanytarsus penicillatus-type, which was closely related to aquatic plants. The results of redundancy analysis showed that the total organic carbon content and grain size were the main environmental factors affecting the succession of Chironomus. The both explained the 31%. climate change of the chironomid assemblage by changing the water quantity of the wetland. The balance affects the aquatic vegetation, soil erosion and water disturbance, and then affects the succession of chironomid population.

【作者单位】：中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室;中国科学院大学;
【基金】：环境保护部环保公益性项目(201309041)资助
【分类号】：P532;Q915

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