亚博app

应用集萃法分析海河流域滨海湿地退化成因
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亚博app (beijingdaxue chengshiyuhuanjingxueyuan, beijing 100871)

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Identifying the Degradation Causes of the Coastal Wetlands in Haihe River Basin Based on Meta-Analysis
YANG Haozhen, YANG Xiaoliu

亚博app (college of urban and environmental sciences, peking university, beijing 100871, china)

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亚博app

备注

jinnianlai,haiheliuyubinhaishidituihuaxianxiangyanzhong,weikexuehelididuiqishishihuifuhebaohu,xutanjiushidituihuadeyingxiangyinsu,bianshizhuyaotuihuachengyin。guangfanshoujiyaboapphaiheliuyubinhaishidituihuapingjiadeshizhengyanjiuanli,caiyongjicuifazhongdemeta-regressionmoxing,duishidituihuayinsujiqiyingxiangchengdujinxinglezonghexingdeduibiyufenxi。jiehe57geyanjiuanli,tiqu525geguanchazhi,shaixuanchuziranherenweiliangleigong9zhongtuihuayingxiangyinsu,tongguomoxingnihededaogeyinsuduishidituihuadeyingxiangchengdu。moxingjieguoxianshi:haiheliuyubinhaishididetuihuashoudaorenweiyuziranyinsudeshuangzhongyingxiang。renweiyinsuzhong,shuiziyuankaicai(1.512)、shuizhiwuran(0.813)、shuichanyangzhi(0.593)、weikenyujianshezhanyong(0.436)duishidituihuajunweizhengxiaoying,zhengcefagui(-1.202)chengfuxiaoying; ziranyinsuzhong,jiangshuiliang(-0.788)yuheliujingliuliang(-1.176)duishidituihuachengxianzhufuxiaoying,qiwen(0.037)yushengwuduoyangxingsunshi(0.072)chengjiaoruodezhengxiaoying。haiheliuyubinhaishididetuihuayingxiangyinsuanzhaoyingxiangchengdudaxiaopaixuwei:shuiziyuankaicai>zhengcefagui>heliujingliuliang>shuizhiwuran>jiangshuiliang>shuichanyangzhi>weikenyujianshezhanyong>shengwuduoyangxingsunshi>qiwen,shidituihuadehexinchengyinzaiyushidishuiziyuandebujiyucunxushoudaoleweixie。jucijianyi,haiheliuyubinhaishididehuifuyubaohuyingyouxianjiejueshuiyuanwenti,tongshiyingjiaqiangxiangguanzhengce、guihuahefalvdezhidingyuzhixing。

in recent years, the coastal wetlands in haihe river basin have seriously degraded. in order to restore and protect the wetlands scientifically and reasonably, it is necessary to explore the influencing factors of degradation and identify the main degradation causes. in this study, relevant research cases on the evaluation of coastal wetland degradation in haihe river basin were collected extensively, and the meta-regression model was applied to identify the degradation factors and analyze the importance of each factor. 57 research cases were comprehensively analyzed, 525 observations were extracted, and 9 factors of two human and natural types were identified, and the importance of each factor was estimated through model fitting. the modeling results show that the degradation of coastal wetlands in haihe river basin is affected by both human and natural factors. among the human factors, ‘water resources extraction'(1.512), ‘water pollution'(0.813), ‘aquaculture'(0.593), ‘reclamation and construction'(0.436)have positive effects on the degradation, while ‘policies and regulations'(-1.202)have negative effects, which means it is beneficial to restoration and protection of the wetlands. among the natural factors, ‘precipitation'(-0.788)and ‘river runoff'(-1.176)have significantly negative effects, while ‘air temperature'(0.037)and ‘biodiversity loss'(0.072)have relatively weak positive effects. the analysis shows that the degradation factors can be ranked as follow according to their importance: water resources extraction>policies and regulations>river runoff>water pollution>precipitation>aquaculture>reclamation and construction>biodiversity loss >air temperature. the core cause of wetland degradation is that the supply and storage of wetland water resources have been under threat. it is implied that the primary task to protect and restore the coastal wetlands in haihe river basin is to tackle the issues on water resources development and, at the same time, to strengthen the formulation and enforcement of the policies and regulations relevant to wetland protection and restoration.

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