Based on the data of wetlands in Huanghe delta and Liaohe delta which were go by the combination of Remote Sensing(RS), Geographical Information System(GIS) and Global Position System(GPS), the paper discusses the sin...Based on the data of wetlands in Huanghe delta and Liaohe delta which were go by the combination of Remote Sensing(RS), Geographical Information System(GIS) and Global Position System(GPS), the paper discusses the sindlarities and differences of wetlands in the two regions by comparing them in composition, distribuhon, spatial pattern of landscape and ecology. Problems in using and conserving weiland resources are shown in the paper, which aimto provide basis for the further study on the landscape ecology, function, and sustainable use of weilands in the deltas. The study shows that the wedands in the two deltas are characterized by peat variety of weiland types, distribution with the shape of strip, abundant resources of wild plants and animals, intense effects of human activities on the structure of the landscapes, broad prospects for development and great environmental pressure. It is necessary to successfull solve the contradiction between development and protection. At present, the most pressing matter of the moment is to protect environment and control pollution.展开更多
采用双指示种分析(Two Way Indicators Species Analysis,TWINSPAN)和除趋势对应分析(Detrended Corre-spondence Analysis,DCA)方法,对位于三江平原的建三江农垦分局内的湿地植物群落的数据进行群落数量分类和排序。调查的86个样地中...采用双指示种分析(Two Way Indicators Species Analysis,TWINSPAN)和除趋势对应分析(Detrended Corre-spondence Analysis,DCA)方法,对位于三江平原的建三江农垦分局内的湿地植物群落的数据进行群落数量分类和排序。调查的86个样地中共发现49科133属226个物种;TWINSPAN将样地划分为8种群丛,将优势物种划分为8组,分类结果可以在DCA排序图上很好地反映出来,且优势物种的分布格局很大程度上决定了群丛的分布格局;DCA的前两个排序轴提供了23.5%的信息量,其中第一排序轴提供了14.5%的信息量,主要反映出样地水分条件的变化;样地的排序结果反映了植物群落类型与环境因子之间的关系。展开更多
文摘Based on the data of wetlands in Huanghe delta and Liaohe delta which were go by the combination of Remote Sensing(RS), Geographical Information System(GIS) and Global Position System(GPS), the paper discusses the sindlarities and differences of wetlands in the two regions by comparing them in composition, distribuhon, spatial pattern of landscape and ecology. Problems in using and conserving weiland resources are shown in the paper, which aimto provide basis for the further study on the landscape ecology, function, and sustainable use of weilands in the deltas. The study shows that the wedands in the two deltas are characterized by peat variety of weiland types, distribution with the shape of strip, abundant resources of wild plants and animals, intense effects of human activities on the structure of the landscapes, broad prospects for development and great environmental pressure. It is necessary to successfull solve the contradiction between development and protection. At present, the most pressing matter of the moment is to protect environment and control pollution.
文摘采用双指示种分析(Two Way Indicators Species Analysis,TWINSPAN)和除趋势对应分析(Detrended Corre-spondence Analysis,DCA)方法,对位于三江平原的建三江农垦分局内的湿地植物群落的数据进行群落数量分类和排序。调查的86个样地中共发现49科133属226个物种;TWINSPAN将样地划分为8种群丛,将优势物种划分为8组,分类结果可以在DCA排序图上很好地反映出来,且优势物种的分布格局很大程度上决定了群丛的分布格局;DCA的前两个排序轴提供了23.5%的信息量,其中第一排序轴提供了14.5%的信息量,主要反映出样地水分条件的变化;样地的排序结果反映了植物群落类型与环境因子之间的关系。