Establishment of evaluation system of an ecosystem integrity in Weihe River
SONG Mengmeng1, TIAN Shuang1, LU Aoran1, YIN Xuwang1*, XU Zongxue2
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1.Liaoning Provincial Key Laboratory for Hydrobiology, College of Fisheries and Life Science, Dalian Ocean University; 2.College of Water Science, Beijing Normal University, Beijing
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文章历史+
出版日期
2020-04-07
发布日期
2020-04-07
摘要
为优化生物完整性指数，建立河流健康状况评价的合理方法，基于渭河60个点位的物理特征、化学特征和着生藻类群落特征，进行渭河生态系统完整性评价体系(Index of ecosystem integrity, IEI)的构建并评价其生态系统完整性状况；河流IEI评价体系3个部分(生态系统物理完整性、化学完整性、着生藻类生物完整性)各成一套体系，筛选出核心指标，采用比值法、分位数法得出各点位健康评价结果；同时对各点位进行了生物完整性(Index of biological integrity of periphytype, P-IBI)评价和基于《地表水环境质量标准》的水质评价，用于验证IEI指数的科学性和准确性。结果表明：IEI评价显示，渭河有健康点位6个，较好点位4个，一般点位9个，较差点位41个；经对比，IEI分别与P-IBI、水质评价具有极显著相关性(P<0.01)，P-IBI与IEI评价结果完全相同和只差一个等级的点位有58个，占96.67%，此两种评价结果有差异的点位表现为IEI完善了P-IBI评价结果，符合生态系统的健康状况(W18、W37),而水质评价与IEI评价结果完全相同的点位共29个，占48.33%，评价等级相差3个等级和2个等级的点位共有14个，两者占23.33%，部分点位(L2、J1)IEI弥补了水质评价的不足。研究表明，IEI可以完善并改进P-IBI、水质评价评价结果，可作为河流健康状况评价的一种新方法，可在其他河流健康评价中进行推广应用。
Abstract
To optimize the IBI we used the Weihe river as an example to construct the index of ecological integrity(IEI).Physical-chemical factors and characteristics of the stream periphyton community of 60 samples sites were investigated to assess the IEI.The IEI evaluation system was composed of three parts(physical integrity, chemical integrity and IBI of the periphyton), each of which had their own core indicators.The health evaluation results of each point were obtained by the ratio method and the quantity method.Meanwhile, the water quality assessment and P-IBI of the periphytic community were carried out to verify the accuracy of the system.IEI evaluation showed that there were 6 healthy sites, 4 good sites, 9 general sites and 41 poor sites in the Weihe River.The correlation analysis revealed that IEI was significantly correlated with P-IBI and water quality assessment(P<0.01).There were 58 points that had a one grade difference, indicating that the P-IBI and IEI evaluation were similar.Some P-IBI and IEI results were significantly different(W18, W37).There was a significant correlation between water quality assessment and IEI scores(P<0.01), with identical evaluation results in 29 points, accounting for 48.33% in the all sites, and 14 points with 3 and 2 grade differences, accounting for 23.33% in the all sites.IEI make up for the shortage of water quality assessment on some points(L2, J1).The findings indicated that the IEI was more accurate than P-IBI and water quality assessment, and served as a reasonable method to assess the condition of river health.
SONG Mengmeng, TIAN Shuang, LU Aoran, YIN Xuwang, XU Zongxue.
Establishment of evaluation system of an ecosystem integrity in Weihe River[J]. Journal of Dalian Fisheries University, 2020, 35(2): 288-295 https://doi.org/10.16535/j.cnki.dlhyxb.2019-232
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