海南坡鹿栖息地的外来植物调查

海南坡鹿是中国特有的国家Ⅰ级重点保护野生动物，其栖息地的稳定和发展对该物种种群有重要意义。潜在的外来入侵植物会对栖息地产生长期不可恢复的影响。因此，我们于2009—2011年采用样方调查和线路调查相结合的方法对海南坡鹿的栖息地海南大田国家级自然保护区内的外来植物进行了调查，共记录外来植物40科95属115种。其中，草本植物80种，占总物种数的69．6％；不论从科区系还是属区系上看，外来植物的区系分布都具有热带性；50．4％的外来植物产自美洲，在草地中分布最多。保护区内分布广泛的外来植物已对乡土物种产生一定的影响，也将可能对坡鹿的食物资源产生不利影响。根据调查结果，我们提出了一些保护管理建议。

Field Survey of Alien Plants in Habitats of Hainan Eld's Deer ( Cervus eldi hainanus )

Hainan Eld＇s deer （ Cervus eldi hainanus ） is a national - level protected species and endemic to China. The stability and development of Eld＇s deer habitats play a significant role in population growth. Alien invasive plants can affect habitats ir- reversibly over long time periods. We surveyed the alien plants in Hainan Datian National Nature Reserve, where Hainan Eld＇s deer occur, using line transects and quadrats from 2009 to 2011. We recorded 115 alien plant species of 40 families and 95 genera. Among these, 80 herbs accounted for 70% and most are tropical species, 50% were introduced from the Americas and were mainly distributed in grasslands. The widely distributed alien plants impact the abundance and distribution of native spe- cies and may have a negative effect on Eld＇s deer food resource in future. We make several recommendations for effective man- agement and conservation. Our survey results can provide a basis for maintaining the stability of Hainan Eld＇s deer habitat.