人为干扰对绿洲胡杨种群特征和水肥条件的影响
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摘要
额济纳胡杨林保护区是我国西北干旱区的一道强大生态防线。近年来,受地下水动态变化的影响,胡杨林开始严重退化,而最近的调查结果表明,大量的农业活动和频繁的放牧在不断侵扰着胡杨林的生态环境,不仅对胡杨林生境的水分与养分条件产生了重要的影响,更导致了胡杨密度、胸径等种群特征产生较大的差异,强烈的人为干扰活动长期得不到有效控制,必然会加剧胡杨种群更新与维持的困难。建议尽快开展控制放牧与农业活动等相应保护措施。
Ejina Populus National Nature Reserve is a powerful ecological defense line in the arid region of northwest China. In recent years, due to the dynamic changes of groundwater, Populus euphratica forest began to seriously degrade. Recent survey results show that a large number of agricultural and frequent grazing activities destroy the ecological environment of Populus euphratica forest, which had important influence on the populus euphratica population characteristics and its water and fertilizer conditions, and led to the differences in some population characteristics such as distribution density, DBH and so on. If strong human disturbance activities can not be effectively controlled, it will inevitably aggravate the difficulty of its population renewal and maintenance. It is suggested to carry out the corresponding protective measures such as controlling grazing and agricultural activities as soon as possible.
Ejina Populus National Nature Reserve is a powerful ecological defense line in the arid region of northwest China. In recent years, due to the dynamic changes of groundwater, Populus euphratica forest began to seriously degrade. Recent survey results show that a large number of agricultural and frequent grazing activities destroy the ecological environment of Populus euphratica forest, which had important influence on the populus euphratica population characteristics and its water and fertilizer conditions, and led to the differences in some population characteristics such as distribution density, DBH and so on. If strong human disturbance activities can not be effectively controlled, it will inevitably aggravate the difficulty of its population renewal and maintenance. It is suggested to carry out the corresponding protective measures such as controlling grazing and agricultural activities as soon as possible.
引文
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[12]高伟,叶功富,游水生,等.不同干扰强度对沙质海岸带植物物种β多样性的影响[J].生态环境学报,2010,9(11):2 581-2 586.
[13]雷平,邹思成,兰文军.不同干扰强度下江西武夷山河岸带阔叶林群落的结构与数量特征[J].植物科学学报,2014,32(5):460-466.
[14]杨梅,林思祖,曹光球.不同人为干扰强度下甜槠群落物种多样性比较分析[J].东北林业大学学报,2009,37(7):30-32.
[15]张尚炬,范海兰,洪滔,等.干扰强度对仙人谷国家森林公园森林群落结构特征的影响[J].亚热带农业研究,2007,3(1):39-44.
[2]王世绩,陈炳浩,李护群.胡杨林[M].北京:中国环境科学出版社,1995.
[3]刘钟龄,朱宗元,郝敦元.黑河流域地域系统的下游绿洲带资源-环境安全[J].自然资源学报,2002,17(3):286-293.
[4]王根绪,程国栋.近50a来黑河流域水文及生态环境的变化[J].中国沙漠,1998,18(3)233-238.
[5]张武文,史生胜.额济纳绿洲地下水动态与植被退化关系的研究[J].冰川冻土,2002,24(4):421-425.
[6]康向阳.甘肃胡杨恢复发展的限制因子及对策[J].中国沙漠,1997,17(01):53-57.
[7]赵文智,常学礼,何志斌,等.额济纳荒漠绿洲植被生态需水量研究[J].地球科学,2006,36(6):559-566.
[8]王根绪,程国栋,沈永平.干旱区受水资源胁迫的下游绿洲动态变化趋势分析-以黑河流域额济纳绿洲为例[J].应用生态学报,2002,13(5):564-568.
[9]张玉波,李景文,张昊,等.额济纳胡杨有性繁殖失败因素分析[J].科学技术与工程,2005,5(8):467-472.
[10]薛忠歧,龚斌,万力,等.黑河下游额济纳绿洲变化规律及其相关因素分析[J].地学前缘,2006,13(1):48-51.
[11]金晓媚,胡光成,李文梅.中国西北地区额济纳绿洲植被盖度与黑河流量的滞后效应研究[J].地学前缘,2008,15(4):198-203.
[12]高伟,叶功富,游水生,等.不同干扰强度对沙质海岸带植物物种β多样性的影响[J].生态环境学报,2010,9(11):2 581-2 586.
[13]雷平,邹思成,兰文军.不同干扰强度下江西武夷山河岸带阔叶林群落的结构与数量特征[J].植物科学学报,2014,32(5):460-466.
[14]杨梅,林思祖,曹光球.不同人为干扰强度下甜槠群落物种多样性比较分析[J].东北林业大学学报,2009,37(7):30-32.
[15]张尚炬,范海兰,洪滔,等.干扰强度对仙人谷国家森林公园森林群落结构特征的影响[J].亚热带农业研究,2007,3(1):39-44.