保護(hù)濕地，應(yīng)對(duì)氣候變化-展示頁(yè)
2025-03-31 05:19本頁(yè)面
【正文】 pulation dropped drastically in the past decades and it was thought to be likely extinct or functionally extinct according to the results of the latest 2022 Expedition for Yangtze River Dolphins. Yangtze finless porpoise（ Neophocaena phocaenoides asiaeorientalis ） is the only freshwater subspecies of Neophocaena, which only lives in the Yangtze River and its appended big lakes. The finless porpoises have to struggle with all of the threats that baiji had suffered, and their population is also dropping significantly. Yangtze River Cetaceans : Baiji and Yangtze finless porpoise Your logo V i e t n amC h i n aA m e r i c aB r az i lG e r m an yS p ai nO t h e r s世界各國(guó)養(yǎng)豬數(shù)量比列 長(zhǎng)江中下游是中國(guó)三大畜禽產(chǎn)業(yè)帶之一 P i gC a t t l e a n d s h e e pP o u t r yOt h e r s中國(guó)畜禽業(yè)中各養(yǎng)殖品種的比重 Your logo L P F IO t h e r sI n du s t r yD om e s t i cpo l l u t i onA g r i c u l t u r eRatio of COD discharge from different sectors in Wuhan LPFI pollution accounts for about 61% of COD discharge. By contrast, domestic pollution 23%, and farming + industry pollution 15%. 畜禽養(yǎng)殖業(yè)污染問(wèn)題 Your logo 湖泊環(huán)境惡化 ? 沉水植被銳減 ? 水體富營(yíng)養(yǎng)化（外源與內(nèi)源污染） ? 生境破碎化 草型湖泊 藻型湖泊 ? 過(guò)度放養(yǎng) ? 施肥 ? 過(guò)度投餌 長(zhǎng)江中下游湖泊環(huán)境面臨的問(wèn)題 Your logo 環(huán)境流中斷 : 堤 + 壩 通江湖泊與阻隔湖泊的 魚(yú)類(lèi)種數(shù)比較 魚(yú)種類(lèi)數(shù) ?通江湖泊 ?阻隔湖泊 洄游性魚(yú)類(lèi) 定居性魚(yú)類(lèi) Total fish Effect: 長(zhǎng)江中下游阻隔湖泊生物多樣性下降 I980年代長(zhǎng)江中下游 4088 湖泊 , 20,000 km2 ( km2 lake, 1980s ) 但目前絕大多數(shù)因圍墾與防洪需要而被大堤阻斷江湖自由聯(lián)系 Your logo Global Warming/Climate Change Your logo 環(huán)境流中斷 + 污染 + 氣候變化 高溫少雨誘使 2022年春夏太湖暴發(fā)藍(lán)綠藻華和飲水危機(jī) 問(wèn)題 : 富營(yíng)養(yǎng)湖泊水體出現(xiàn)飲水危機(jī) 總磷 葉綠素回歸曲線(xiàn) 通江湖泊與阻隔湖泊
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