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首页> 外文期刊>Biotropica >Niche Differentiation and its Relationship with Food Abundance and Vegetation Complexity in Four Frugivorous Bat Species in Southern Mexico
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Niche Differentiation and its Relationship with Food Abundance and Vegetation Complexity in Four Frugivorous Bat Species in Southern Mexico

机译：墨西哥南部四种食肉蝙蝠物种的生态位分化及其与食物丰度和植被复杂性的关系

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摘要

Species can co-exist within a community when their use of limiting resources is differentiated. To test whether differentiation facilitates coexistence, we quantified differences and overlap in habitat use, fruit consumption, morphological characteristics, and the relationship with vegetation structure for two pairs of ecologically similar frugivorous bat species, Carollia sowelli and C.perspicillata, and Artibeus jamaicensis and A.lituratus. In Carollia sowelli and C.perspicillata, differences in body mass and wing aspect ratio were not reflected in differences in fruit or habitat use (diet overlap, 96 percent; habitat overlap, 98 percent). However, the capture rate of Carollia sowelli positively correlated with canopy openness, and that of C.perspicillata positively correlated with tree height. Body mass and wing characteristics of Artibeus species suggested a greater maneuverability for A.jamaicensis. Also, more A.jamaicensis individuals were captured feeding on Ficus spp., while Artibeus lituratus preferred fruits of the early successional tree Cecropia. However, both habitat overlap and diet overlap were higher than by chance (diet overlap, 75 percent; habitat overlap, 92 percent). The co-existence of the four bat species in the study area may be facilitated by the abundance of the food resources forming part of the diets of both Carollia species, by the morphological differences between the Artibeus species, which allow the differentiation of foraging behavior in relation to fruit consumption, and by the structural characteristics of the vegetation.
机译：当物种对有限资源的使用有所不同时，它们可以共存。为了测试分化是否促进共存，我们量化了两对生态相似的食角蝙蝠物种Carollia sowelli和C.perspicillata以及Artibeus jamaicensis和A在栖息地使用，水果消耗，形态特征以及与植被结构的关系上的差异和重叠， .lituratus。在Carollia sowelli和C.perspicillata中，体重和翅长宽比的差异没有反映在水果或栖息地使用的差异上（饮食重叠，占96％;栖息地重叠，占98％）。然而，卡洛里亚的捕获率与冠层的开放度呈正相关，而C.perspicillata的捕获率与树高呈正相关。 Artibeus物种的体重和机翼特征表明A.jamaicensis具有更高的可操纵性。此外，还捕获了更多的以榕属植物为食的jamicensis个体，而Artibeus lituratus则喜欢早期演替树Cecropia的果实。但是，生境重叠和饮食重叠均高于偶然性（饮食重叠为75％;栖息地重叠为92％）。研究区域中四种蝙蝠物种的共存可能是由于两种卡罗利亚物种的饮食组成中丰富的食物资源，Artibeus物种之间的形态差异所致，从而使觅食行为的分化成为可能。与水果消费的关系，以及植被的结构特征。

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