| 基于底栖动物的松花江流域不同地形分区水质指标阈值研究 |
| |
| 引用本文： | 程佩瑄,孟凡生,王业耀,张铃松,杨琦,薛浩.基于底栖动物的松花江流域不同地形分区水质指标阈值研究[J].环境科学研究,2020,33(9):2061-2073. |
| |
| 作者姓名： | 程佩瑄 孟凡生 王业耀 张铃松 杨琦 薛浩 |
| |
| 作者单位： | 1.中国地质大学(北京)水资源与环境学院, 北京 100083 |
| |
| 基金项目： | 国家水体污染控制与治理科技重大专项（No.2017ZX07302002） |
| |
| 摘 要： | 为全面了解松花江流域不同地形分区内底栖动物群落对水质指标的响应规律，识别不同分区水质指标指示物种的差异，于2016—2018年对松花江流域97个采样点的水质指标〔EC、ρ（DO）、ρ（CODMn）、ρ（NH3-N）、ρ（TN）、ρ（TP）〕和大型底栖动物群落进行调查分析，采用临界指示物种分析法（threshold indicator taxa analysis，TITAN）分别探讨松花江流域山区、丘陵区和平原区水质指标的生态阈值，当污染物浓度超过负响应阈值时敏感种密度降低，当超过正响应阈值时耐受种也会受到明显影响，底栖动物群落结构会发生显著变化.将TITAN法所得的负响应阈值作为触发底栖动物群落发生变化的最低值，正响应阈值为底栖动物群落的耐受极限值.结果表明:①松花江流域水质指标在不同地形分区内的阈值不同，除ρ（DO）和ρ（CODMn）外，其他指标负响应阈值均表现为山区 < 丘陵区 < 平原区，ρ（DO）则表现相反，ρ（CODMn）在丘陵区出现最高阈值（5.46 mg/L）、山区出现最低阈值（4.01 mg/L）.除ρ（DO）以外，其他指标的正响应阈值均呈山区 < 丘陵区 < 平原区的趋势，ρ（DO）正响应阈值的变化趋势则与之相反.②松花江流域内超过50%的采样点水质指标值均超过其负响应阈值，超出正响应阈值的采样点比例在6%~40%之间，说明流域受到一定的干扰，但干扰程度不严重.③同一物种在不同地形分区内对水体理化指标的指示方向可能相反.萝卜螺属在丘陵区为ρ（NH3-N）的正响应指示物种，在平原区则转变为负响应指示物种；短沟蜷属在丘陵区为ρ（TN）和ρ（TP）的正响应物种，在平原区则转变为负响应物种.研究显示，大型底栖动物群落结构的分布特征是影响水质指标阈值指示物种识别的主要原因，而不同分区的自然地理状况、栖境状况和水质状况则是造成大型底栖动物群落结构分布差异的主要因素.
|
| 关 键 词： | 松花江流域 地形分区 阈值 临界指示物种分析法(TITAN) 底栖动物 |
| 收稿时间： | 2019/7/15 0:00:00 |
| 修稿时间： | 2020/3/10 0:00:00 |
Thresholds of Water Quality Indicators for Macroinvertebrate in Different Topographic Zones of Songhua River Basin |
| |
| CHENG Peixuan,MENG Fansheng,WANG Yeyao,ZHANG Lingsong,YANG Qi,XUE Hao.Thresholds of Water Quality Indicators for Macroinvertebrate in Different Topographic Zones of Songhua River Basin[J].Research of Environmental Sciences,2020,33(9):2061-2073. |
| |
| Authors: | CHENG Peixuan MENG Fansheng WANG Yeyao ZHANG Lingsong YANG Qi XUE Hao |
| |
| Affiliation: | 1.School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China2.Chinese Research Academy of Environmental Sciences, Beijing 100012, China3.China National Environmental Monitoring Centre, Beijing 100012, China |
| |
| Abstract: | In order to explore the response patterns of macroinvertebrate to water quality indicators in different topographic zones of the Songhua River Basin and to identify the differences of indicator taxa for water quality parameters, water quality indicators (EC, ρ(DO), ρ(CODMn), ρ(NH3-N), ρ(TN), ρ(TP)) and macroinvertebrate communities were investigated at 97 sampling sites from 2016 to 2018. The threshold indicator taxa analysis (TITAN) was used to analyze water quality indicator thresholds of macroinvertebrate community composition in mountainous, hilly and plain zones, respectively. When the pollutant concentration exceeded the negative thresholds, the sensitive taxa density decreased, whereas when the positive thresholds were exceeded, the tolerant species were also significantly affected, resulting in significant changes in the macroinvertebrate community structure. The negative thresholds were used as the minimum value to trigger the change of macroinvertebrate community, while the positive thresholds were used as the tolerance limit of macroinvertebrate community. The results showed that: (1) Except for ρ(DO) and ρ(CODMn), the negative thresholds of other water quality indicators showed a trend of mountain < hill < plain, while ρ(DO) was the opposite, and ρ(CODMn) had the highest threshold in hilly zone with the concentration of 5.46 mg/L, while the lowest (4.01 mg/L) in mountainous zone. (2) More than 50% sites exceeded the negative thresholds of water quality indicators, 5%-40% sites exceeded the positive thresholds, which means an extent of anthropogenic disturbance. (3) Some species in different topographic zones exhibited the opposite directions of water quality indicators. For example, Radix showed positive response to ρ(NH3-N) in hilly zone, while in plain zone it turned to negative taxa. Semisulcospira exhibited positive response to ρ(TN) and ρ(TP) in hilly region, while in plain region it showed the opposite response. The study shows that physical-geography and habitat conditions in different zones are dominant factors influencing the distribution patterns of macroinvertebrate community, which indirectly affects indicator species screening in TITAN. |
| |
| Keywords: | Songhua River Basin topographic regionalization threshold threshold indicator taxa analysis (TITAN) macroinveterbrates |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《环境科学研究》浏览原始摘要信息 |
|
点击此处可从《环境科学研究》下载全文 |
|
