Indirect effects of domestic and wild herbivores on butterflies in an African savanna.
Indirect effects of domestic and wild herbivores on butterflies in an African savanna.
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DOI：
10.1002/ece3.744
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发表时间：
2013-10
影响因子：
2.6
通讯作者：
Young, Truman P.
中科院分区：
文献类型：
--
作者：
Wilkerson, Marit L.;Roche, Leslie M.;Young, Truman P.
关键词：
由牲畜和野生食草动物驱动的间接相互作用越来越被认为是稀树草原和牧场群落动态的重要方面。大型有蹄类食草动物可以直接和间接影响植物的繁殖结构，进而影响这些植物的传粉者。我们在肯尼亚中部半干旱稀树草原的一组长期、大型食草动物保护区中，研究了野生食草动物和牛如何间接影响常见传粉蝴蝶分类群 Colotis spp. 的丰度。我们还研究了排除草食动物对主要食用植物 Colotis spp. 的影响，该植物也是我们样地中最常见的开花物种：灌木 Cadaba farinosa。该研究在四种类型的实验田中进行：仅限牛、仅限野生动物、牛和野生动物（均为大型食草动物）、无大型食草动物。在所有地块中，Colotis spp。丰度与卡达巴花数量（成虫食物资源）和卡达巴冠层总面积（幼虫食物资源）呈正相关。结构方程模型（SEM）表明，花卉资源推动了大斑蝶的丰富度。排除浏览野生动物的影响，卡达巴花和大斑蝶的数量都增加了。然而，花数和结肠属植物。有牛草食动物的地块的丰度高于排除所有大型食草动物的地块。我们的研究结果表明，野生食草动物可以抑制传粉媒介物种，而管理良好的牛的使用可能有利于重要的传粉媒介和依赖它们的植物。这项研究记录了一系列新颖的生态相互作用，展示了如何在拥有丰富野生动物和牲畜的工作景观中实现保护和生计目标。
Indirect interactions driven by livestock and wild herbivores are increasingly recognized as important aspects of community dynamics in savannas and rangelands. Large ungulate herbivores can both directly and indirectly impact the reproductive structures of plants, which in turn can affect the pollinators of those plants. We examined how wild herbivores and cattle each indirectly affect the abundance of a common pollinator butterfly taxon, Colotis spp., at a set of long-term, large herbivore exclosure plots in a semiarid savanna in central Kenya. We also examined effects of herbivore exclusion on the main food plant of Colotis spp., which was also the most common flowering species in our plots: the shrub Cadaba farinosa. The study was conducted in four types of experimental plots: cattle-only, wildlife-only, cattle and wildlife (all large herbivores), and no large herbivores. Across all plots, Colotis spp. abundances were positively correlated with both Cadaba flower numbers (adult food resources) and total Cadaba canopy area (larval food resources). Structural equation modeling (SEM) revealed that floral resources drove the abundance of Colotis butterflies. Excluding browsing wildlife increased the abundances of both Cadaba flowers and Colotis butterflies. However, flower numbers and Colotis spp. abundances were greater in plots with cattle herbivory than in plots that excluded all large herbivores. Our results suggest that wild browsing herbivores can suppress pollinator species whereas well-managed cattle use may benefit important pollinators and the plants that depend on them. This study documents a novel set of ecological interactions that demonstrate how both conservation and livelihood goals can be met in a working landscape with abundant wildlife and livestock.
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DOI：
10.2307/4003955
发表时间：
2004-01-01
期刊：
JOURNAL OF RANGE MANAGEMENT
影响因子：
--
作者：
Hickman, KR;Hartnett, DC;Owensby, CE
通讯作者：
Owensby, CE
影响因子：
5.9
作者：
Georgiadis, Nicholas J.;Olwero, J. G. Nasser;Romanach, Stephanie S.
通讯作者：
Romanach, Stephanie S.
影响因子：
3
作者：
Damhoureyeh, SA;Hartnett, DC
通讯作者：
Hartnett, DC
影响因子：
5.5
作者：
Goheen, Jacob R.;Young, Truman P.;Palmer, Todd M.
通讯作者：
Palmer, Todd M.
影响因子：
3.3
作者：
Gomez, Jose M.;Abdelaziz, Mohamed;Perfectti, Francisco
通讯作者：
Perfectti, Francisco