Temporal and Spatial Diversity and Distribution of Arboreal Carabidae (Coleoptera) in a Western Amazonian Rain Forest1
Temporal and Spatial Diversity and Distribution of Arboreal Carabidae (Coleoptera) in a Western Amazonian Rain Forest1
复制标题
亚马逊西部雨林树栖步甲科（鞘翅目）的时空多样性和分布1
DOI：
10.1111/j.1744-7429.2002.tb00551.x
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
J. D. Witman
中科院分区：
文献类型：
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作者：
A. Lucky;T. Erwin;J. D. Witman
摘要在厄瓜多尔亚马逊河流域100×1000米的陆地森林样地内，对100个3×3 m站位的树栖步甲进行了熏蒸采样。从1994年1月至1996年10月的9个采样日共获得2329只个体，分属318种，其中50%以上为未记述种。采样的物种比例很高，在每个采样日期(单胞胎)出现一次的比例从50.0%到62.5%不等。在给定的采样日期，研究区内树栖步甲的物种丰富度估计在82到282种之间。多数物种的丰富度大于173种。物种积累曲线在除一个采样日期外的所有日期都达到了渐近线，这表明有足够的采样努力来表征步甲动物的多样性。基于汇集数据的总累积曲线未能达到渐近线。两个采样日之间物种组成的周转率很高；大多数采样日之间共享的物种不到50%，这表明总的物种库可能非常大。虽然物种组成随季节变化，但物种丰富度变化不大。空间自相关分析表明，在280m以下有明显的物种组合格局，未描述物种所占比例较大，物种积累曲线总体不平坦，物种组成周转率高，表明步甲的物种多样性远高于人们所认为的水平。
Abstract Diversity of arboreal carabid beetles was sampled by fumigation in 100 3 × 3 m stations within a 100 × 1000 m terra firme forest plot in Ecuadorian Amazonia. Nine sampling dates from January 1994 to October 1996 yielded 2329 individuals belonging to 318 species of which more than 50 percent were undescribed species. A high percentage of the species sampled were rare; the proportion that occurred once per sampling date (singletons) ranged from 50.0 to 62.5 percent. Estimates of species richness were from 82 to 282 species of arboreal carabids in the study plot on a given sampling date. Most richness values were greater than 173 species. Species accumulation curves attained asymptotes for all but one sampling date, indicating that an adequate level of sampling effort was used to characterize the diversity of carabid fauna. Total accumulation curves based on pooled data failed to reach asymptotes. There was a high turnover in species composition between sampling dates; less than 50 percent of the species between the majority of sampling dates were shared, suggesting that the total species pool may be extremely large. Although species composition changed seasonally, species richness varied little. Spatial autocorrelation analysis revealed that the structure of this species assemblage was significantly patterned at distances below 280 m. Taken together, the large percentage of undescribed species, the failure of the overall species accumulation curves to level off, and the high turnover in species composition indicate that the species diversity of carabid beetles is far higher than previously thought.