【摘要】 植被覆盖的变化会影响动植物生境,进而作用于生物的分布、繁殖和数量等。研究朱鹮典型栖息地的植被覆盖变化对朱鹮保护具有极为重要的意义。利用2000—2014年的MODIS NDVI数据,采用最大像元法、线性趋势法和变异系数法,研究了朱鹮典型栖息地植被覆盖的时空变化特征。结果显示:(1)朱鹮典型栖息地植被NDVI呈现波动性微增长的态势,洋县和研究区呈同步变化特征,宁陕县微增变化不明显。(2)空间上秦岭中低山和巴山浅山丘陵区植被NDVI有所增长,生态环境有所改善。(3)朱鹮活动范围主要集中在温带落叶阔叶林带和亚热带山地针叶林带,以低地形和中低地形为主。更多还原

【Abstract】 The change of vegetation coverage affected the habitat of animals and plants, and then affected its distribution, reproduction and quantity and so on. It is of great importance to study the change of vegetation coverage in typical habitat of Crested Ibis. Using MODIS-NDVI dataset, the spatiotemporal characteristics of vegetation coverage in typical habitat of Crested Ibis were studied by using maximum pixel method, linear trend method and coefficient of variation during the period 2000-2014. The results showed:(1)NDVI of vegetation in typical habitat of Crested Ibis showed a trend of fluctuating and slight increase. NDVI of vegetation in Yangxian showed a synchronous change with NDVI of vegetation in the whole research area, while NDVI of vegetation in Ningshan County showed no obvious change.(2)Spatially, NDVI of vegetation increased in the middle and low mountains of Qinling Mountains and the shallow hilly areas of Bashan Mountains, which showed improvement of ecological environment.(3)Crested Ibis mainly lived in temperate deciduous broad-leaved forest zone and subtropical mountain coniferous forest zone, mainly in low and medium-low terrain.更多还原