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Spatiotemporal dynamics of wild herbivore species richness and occupancy across a savannah rangeland: Implications for conservation
Biological Conservation ( IF 4.9 ) Pub Date : 2020-02-01 , DOI: 10.1016/j.biocon.2020.108436
Ramiro D. Crego , Joseph O. Ogutu , Harry B.M. Wells , Gordon O. Ojwang , Dino J. Martins , Peter Leimgruber , Jared A. Stabach

Abstract Private lands are critical for maintaining biodiversity beyond protected areas. Across Kenyan rangelands, wild herbivores frequently coexist with people and their livestock. Human population and livestock numbers are projected to increase dramatically over the coming decades. Therefore, a better understanding of wildlife-livestock interactions and their consequences for biodiversity conservation on private lands is needed. We used a Bayesian hierarchical, multi-species and multi-year occupancy model on aerial survey data of 15 wild-herbivore species, spanning 15 years (2001–2016) to investigate a) spatiotemporal trends in species occurrence and richness across a mosaic of properties with different land uses in Laikipia County, central Kenya; and b) the effects of distance to water, vegetation and livestock relative abundance on species occurrence and richness. Although mean herbivore species richness varied little over time, we observed high spatial variation in species occurrence across Laikipia, mainly driven by negative effects of high livestock relative abundance. As expected, ‘wildlife friendly’ properties had higher herbivore species richness than other areas. However, high variability suggests that some pastoral properties support rich herbivore communities. The area occupied by five species with global conservation concerns (reticulated giraffe, Grevy's zebra, Beisa Oryx, Defassa waterbuck and gerenuk) and for which Laikipia County is one of the last refuges was

中文翻译:

热带草原牧场野生食草动物物种丰富度和占有率的时空动态:对保护的影响

摘要 私有土地对于维持保护区以外的生物多样性至关重要。在肯尼亚的牧场上,野生食草动物经常与人和牲畜共存。预计未来几十年人口和牲畜数量将急剧增加。因此,需要更好地了解野生动物-牲畜的相互作用及其对私人土地上生物多样性保护的影响。我们对跨越 15 年(2001 年至 2016 年)的 15 种野生草食动物的航测数据使用贝叶斯分层、多物种和多年占用模型,以研究 a) 物种出现和丰富度的时空趋势在一系列特性中肯尼亚中部莱基皮亚县的不同土地用途;b) 与水的距离的影响,植被和牲畜相对丰度对物种发生和丰富度的影响。尽管平均草食动物物种丰富度随时间变化不大,但我们观察到莱基皮亚物种出现的高空间变异,主要是由高牲畜相对丰度的负面影响驱动的。正如预期的那样,“对野生动物友好”的地区比其他地区具有更高的食草动物物种丰富度。然而,高度可变性表明一些牧区属性支持丰富的食草动物群落。五个具有全球保护问题的物种(网纹长颈鹿、细纹斑马、Beisa Oryx、Defassa waterbuck 和 Gerenuk)占据的区域,莱基皮亚县是最后的避难所之一 我们观察到莱基皮亚物种出现的高空间变异,主要是由高牲畜相对丰度的负面影响驱动的。正如预期的那样,“对野生动物友好”的地区比其他地区具有更高的食草动物物种丰富度。然而,高度可变性表明一些牧区属性支持丰富的食草动物群落。五个具有全球保护问题的物种(网纹长颈鹿、细纹斑马、Beisa Oryx、Defassa waterbuck 和 Gerenuk)占据的区域,莱基皮亚县是最后的避难所之一 我们观察到莱基皮亚物种出现的高空间变异,主要是由高牲畜相对丰度的负面影响驱动的。正如预期的那样,“对野生动物友好”的地区比其他地区具有更高的食草动物物种丰富度。然而,高度可变性表明一些牧区属性支持丰富的食草动物群落。五个具有全球保护问题的物种(网纹长颈鹿、细纹斑马、Beisa Oryx、Defassa waterbuck 和 Gerenuk)占据的区域,莱基皮亚县是最后的避难所之一
更新日期:2020-02-01
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