Deforestation and plant diversity of Madagascar's littoral forests
Deforestation and plant diversity of Madagascar's littoral forests
复制标题
DOI：
10.1111/j.1523-1739.2006.00562.x
复制
发表时间：
2006-12-01
影响因子：
6.3
通讯作者：
Rabehevitra, David
中科院分区：
文献类型：
--
作者：
Consiglio, Trisha;Schatz, George E.;Rabehevitra, David
很少有研究试图量化马达加斯加森林的减少或记录森林的植物区系组成，因此，我们特别关注马达加斯加东部沿海社区的森林砍伐和植物多样性。我们使用了近13500个标本记录的数据集，这些标本记录来自最近密集的清查工作所收集的历史和当代标本，以列举总的植物物种丰富度并分析沿海森林的特有程度。利用地理信息系统工具、遥感数据（卫星图像和低海拔数字摄影）和环境数据层估计了沿海森林覆盖从原始到目前程度的变化。在原始的沿海森林中，只有10.3%以小森林包裹的形式存在，而这些剩余的碎片中只有1.5%被包括在现有的保护区网络中。此外，大约13%的马达加斯加本地植物群来自这些森林，而这些森林最初只占马达加斯加陆地总面积的1%，在已知的1535种沿海森林植物中，有25%以上是该群落特有的。考虑到马达加斯加东海岸人类定居的持续压力，保护剩余的森林碎片对它们的生存至关重要。我们确定的15个最大的完整沿海森林碎片，总共占剩余沿海森林的41.5%，是马达加斯加政府推荐的植物保护优先地点之一，并纳入保护区网络。
Few studies have attempted to quantify the reduction or document the floristic composition of forests in Madagascar Thus, we focused specifically on deforestation and plant diversity in Madagascar's eastern littoral community. We used a data set of approximately 13,500 specimen records compiled from both historical and contemporary collections resulting from recent intensive inventory efforts to enumerate total plant species richness and to analyze the degree of endemism within littoral forests. Change in littoral forest cover from original to current extent was estimated using geographical information systems tools, remote sensing data (satellite imagery and low-elevation digital photography), and environmental data layers. Of the original littoral forest only 10.3% remains in the form of small forest parcels, and only 1.5% of these remaining fragments are included within the existing protected-areas network. Additionally, approximately 13% of Madagascar's total native flora has been recorded from these forests that originally occupied < 1% of its total land surface, and over 25% of the 1535 plant species knownfrom littoral forests are endemic to this community Given the ongoing pressure from human settlement along Madagascar's eastern coast, protection of the remaining forest fragments is critical for their survival. Fifteen of the largest intact littoral forest fragments we identified, collectively representing 41.5% of remaining littoral forest, are among priority sites recommended to the government of Madagascar for plant conservation and incorporation into the protected-areas network.