RARITY IN NEOTROPICAL FOREST MAMMALS AND ITS ECOLOGICAL CORRELATES
RARITY IN NEOTROPICAL FOREST MAMMALS AND ITS ECOLOGICAL CORRELATES
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DOI：
10.1111/j.1523-1739.1990.tb00107.x
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发表时间：
1990-06-01
影响因子：
6.3
通讯作者：
REDFORD, KH
中科院分区：
文献类型：
--
作者：
ARITA, HT;ROBINSON, JG;REDFORD, KH
局部密度和分布范围的大小已被用来表征稀有性，但其结论可能缺乏独立性而被削弱。使用这两个变量的有用性和有效性进行了测试的数据分布，局部密度，身体大小，和一组100个新热带森林哺乳动物的食性。在分布范围对局部密度的二元图中，物种根据其营养或分类组进行聚类。这表明饮食和系统发育史对稀有性有影响。分布与丰度呈负相关。然而，这种相关性较弱的营养或分类组，并消失时，身体大小保持不变。这些结果表明，在比较具有相似大小和生态特征的物种时，分布和丰度都是有效的和独立的稀有度估计。回归分析表明，体型较大的动物往往密度较低，分布范围较广。稀有性显然与体型有关。基于分布区和局部密度的稀有性二分分类适用于新热带森林哺乳动物。根据这一计划创建的四个类别中的每一个物种都需要根据物种的生态特征确定不同的保护和管理政策。最终的保护战略还必须受到政治和经济限制的影响。
Local density and size of distributional range have been used to characterize rarity, but conclusions are weakened by their possible lack of independence. The usefulness and validity of using these two variables were tested with data on distribution, local density, body size, and feeding habits for a set of 100 Neotropical forest mammals. In a bivariate plot of distributional range against local density, species clustered according to their trophic or taxonomic groups. This indicates that diet and phylogenetic history have an influence on rarity. A negative correlation was found between distribution and abundance. However, this correlation was weaker within trophic or taxonomic groups, and vanished when body size was held constant. These results show that both distribution and abundance are valid and independent estimators of rarity when comparing species with similar sizes and ecological traits. Regression analysis showed that larger animals tend to have lower densities and wider distributional ranges. Rarity is clearly associated with body size. A dichotomous classification of rarity based on area of distribution and local density is suitable for Neotropical forest mammals. Species in each of four categories created by such a scheme require different conservation and management policies that are determined by the ecological characteristics of the species. Final conservation strategies must also be shaped by political and economic constraints.