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Abstract: Zhengzhou Yellow River Wetland Nature Reserve is not only one of the most important areas of central wetland biodiversity in our country, but also one of the most typical river wetland. In order to offer better protection to the ecological environment, natural vegetation change under different disturbance had been investigated analysis through the study. The results indicated that the factors affecting the ecological environment mainly include tourism, reclamation and large road &bridge construction, Sand-excavating, firing, and grazing; and man-made disturbance effect of the wetland vegetation is basically negative. All sorts of disturbance, the harm of tourism is lighter. Sand- excavating, herding, influenced vegetation growth strongly. Besides, it will cause the serious degradation; and fire and vegetation will bring the original ecological landscape losses. The Yellow River water reduction pulled down wetland flooded area and frequency, forming the wetland degradation. [Copyright &y& Elsevier]

Abstract: Wetland, as the kidney of earth, have an important influence on environment. Recently, the rapid development of Remote Sensing provides an advanced technical platform to the wetland research. This research was under the support of softwares of ERDAS IMAGE, ARCGIS and FRAGSTATS. By interpreting and analyzing two SPOT images in 2002 and 2009, we found the changes of landscape patterns in Yellow River wetland (in the part of Zhengzhou) and the affections of natural and man-made factors had on it. Finally we came to the conclusion that the area of farmland has decreased while the areas of forest and wasteland had increased apparently. This was mainly due to the establishment of nature reserve .The areas of Yellow River and ponds had decreased for the lack of water from upstream. The growing number of people leads to the increase of area of villages. The increase of mean fractal dimensions shows that urbanization has a bigger influence on Yellow River wetland. [Copyright &y& Elsevier]