【摘要】：海勃灣水利樞紐的建設(shè)、運(yùn)行將對西鄂爾多斯胡楊島旅游區(qū)產(chǎn)生不可逆的影響。經(jīng)調(diào)查分析,胡楊島胡楊種群分布面積為2.31 hm~2,總株數(shù)約為1 800株;胡楊種群表現(xiàn)出增長型特征;胡楊林總生物量為95.43 t。海勃灣水利工程運(yùn)行后胡楊島的淹沒歷時延長,淹沒水深、淹沒面積顯著增加,島北部低矮位置甚至全年淹沒。胡楊部分種子可能落入水中被水流攜帶,喪失了種子繁殖的條件。根蘗產(chǎn)生的不定芽在4—6月生長期也會浸在水下,不能完成無性繁殖。胡楊幼苗樹不高于2.5 m,淹沒后無法生存。水庫淹沒將島上以陸生生態(tài)為主的生態(tài)系統(tǒng)演變成以水生生態(tài)為主的生態(tài)系統(tǒng),原有的旅游功能將發(fā)生變化或喪失,須采取生態(tài)補(bǔ)償措施,減免工程造成的生態(tài)影響。
[Abstract]:The construction and operation of Haibo Bay Water Conservancy Project will have an irreversible effect on the West Ordos Populus Island tourist area. Through investigation and analysis, the distribution area of Populus euphratica population was 2. 31 hm~2,. The total plant number of Populus euphratica was about 1 800, the population of Populus euphratica showed an increasing character, and the total biomass of Populus euphratica forest was 95. 43 t. After the operation of Haibo Bay water conservancy project, the duration of submergence of Populus euphratica Island was prolonged, the submerged water depth and the submerged area increased significantly, and the lower position of the northern part of the island was even submerged throughout the year. Some seeds of Populus euphratica may fall into the water and be carried by water. Adventitious buds produced by root tillers will also be submerged during the growth period of April to June, and will not be able to reproduce asexually. Populus euphratica seedlings were not more than 2.5 m and could not survive after inundation. Reservoir inundation changes the terrestrial ecosystem into the aquatic ecosystem, and the original tourism function will be changed or lost. The ecological compensation measures should be taken to reduce the ecological impact caused by the project.
【作者單位】： 中水北方勘測設(shè)計研究有限責(zé)任公司;
【分類號】：S759.9;TV632

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