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Lesser Antillean snake faunas: distribution, ecology, and conservation concerns

机译：小安的列斯蛇的动物区系：分布，生态和保护问题

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Thirty-three islands in the Lesser Antilles range in area from 0.06 to1,510 km~2 and harbour 25 species of snakes representing five families and 10 genera. The islands have suffered at least six, and possibly as many as 11, historical extirpations and at least one historical extinction. The number of snake species per island is 1-5, and species richness is correlated with island size and habitat diversity. Islands that harbour three or more species exhibit greater habitat diversity, are larger, have a higher maximum elevation, and are situated closer to the South American mainland, the source area for most genera. North of the Guadeloupe Archipelago, islands support one or two species (an Alsophis or an Alsophis and a Typhlops). From the Guadeloupe Archipelago southwards, snake faunas have species belonging to genera that are widespread on the Neotropical mainland: Boa, Corallus, Chironius, Clelia, Liophis, Mastigodryas and Bothrops. Between 50 and 75% of the Lesser Antillean snake fauna preys on Anolis lizards. Snake faunas in the Lesser Antilles are not saturated, and many islands could support additional species; fossil evidence and written records indicate that they did. The islands have a 5,000-year history of habitat alteration, but introduced predators probably have had the greatest negative impact on snakes. The potential establishment of an alien snake (e.g. Elaphe guttata) into the Lesser Antilles is a valid concern. Preventing additional introductions of alien predators and protecting satellite island populations of threatened species are the two most important mechanisms for snake conservation in the region.
机译：小安的列斯群岛的33个岛屿的面积在0.06至1,510 km〜2之间，其中有25种蛇，分别代表5个科和10个属。这些岛屿至少遭受了六次甚至可能多达十一次的历史灭绝和至少一次历史性的灭绝。每个岛屿上的蛇种数量为1-5，物种丰富度与岛屿大小和栖息地多样性相关。拥有三个或更多物种的岛屿表现出更大的栖息地多样性，更大，最大海拔更高，并且更靠近南美大陆，这是大多数属的起源地。在瓜德罗普群岛北部，岛屿支持一种或两种物种（一个Also和一个Also和一个Ty属）。从瓜德罗普群岛向南，蛇类动物具有属于新热带大陆的属的物种：蟒蛇，Corallus，Chironius，Clelia，Liophis，Mastigodryas和Bothrops。小安的列斯蛇类动物中有50％至75％的动物以Anolis蜥蜴为食。小安的列斯群岛的蛇动物区系尚未饱和，许多岛屿可以养更多的物种。化石证据和书面记录表明确实如此。这些岛屿有5000年的生境改变历史，但是引进的掠食者可能对蛇产生了最大的负面影响。可能会在小安的列斯群岛建立一条外来蛇（例如Elaphe guttata）的可能性。防止额外引进外来捕食者并保护受威胁物种的卫星岛屿种群是该地区养蛇的两个最重要机制。

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