Thresholds of riparian forest use by terrestrial mammals in a fragmented Amazonian deforestation frontier
Thresholds of riparian forest use by terrestrial mammals in a fragmented Amazonian deforestation frontier
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亚马逊森林砍伐支离破碎的边境地区陆生哺乳动物对河岸森林的利用阈值
DOI：
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发表时间：
2018
影响因子：
3.4
通讯作者：
R. B. Machado
中科院分区：
文献类型：
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作者：
Bárbara Zimbres;C. Peres;G. Penido;R. B. Machado
物种在破碎化景观中的持久性与剩余栖息地遗迹的质量、结构和背景密切相关。河岸植被在巴西的私人土地内受到法律保护，因此我们定量评估了这些遗迹中陆生哺乳动物的占用模式，研究在何种情况下不同物种有效地利用它们。我们选择了38个河岸森林斑块和连续森林内的5个可比较的河岸站点，每个站点安装了4到5个相机陷阱（199个相机陷阱站）。在2013年和2014年旱季期间，对每个站点的陆生哺乳动物群落进行了为期60天的采样。我们模拟了河岸森林残留物内的物种占用和检测概率，并研究了斑块大小，栖息地质量和景观结构对占用概率的影响。然后，我们按比例放大建模占领整个研究区域的所有1915河岸补丁，以确定哪些残余物保留最大的潜力作为陆生脊椎动物的栖息地。10个物种的占用建模，6个响应森林质量（残留退化，牛入侵，棕榈聚集，林下密度）或结构（残留宽度，隔离，长度和面积的补丁，它起源）。斑块适合性较低，考虑栖息地质量比景观结构，几乎所有的河岸遗迹不适合保持高占用率的所有物种，响应森林斑块质量或结构。除了保障河岸残余物数量的法律的合规性，确保陆生脊椎动物在破碎景观中的持久性将需要遏制私人土地所有权内森林退化的驱动因素。
Species persistence in fragmented landscapes is intimately related to the quality, structure, and context of remaining habitat remnants. Riparian vegetation is legally protected within private landholdings in Brazil, so we quantitatively assessed occupancy patterns of terrestrial mammals in these remnants, examining under which circumstances different species effectively use them. We selected 38 riparian forest patches and five comparable riparian sites within continuous forest, at which we installed four to five camera-traps per site (199 camera-trap stations). Terrestrial mammal assemblages were sampled for 60 days per station during the dry seasons of 2013 and 2014. We modelled species occupancy and detection probabilities within riparian forest remnants, and examined the effects of patch size, habitat quality, and landscape structure on occupancy probabilities. We then scaled-up modelled occupancies to all 1915 riparian patches throughout the study region to identify which remnants retain the greatest potential to work as habitat for terrestrial vertebrates. Of the ten species for which occupancy was modelled, six responded to forest quality (remnant degradation, cattle intrusion, palm aggregations, and understorey density) or structure (remnant width, isolation, length, and area of the patch from which it originates). Patch suitability was lower considering habitat quality than landscape structure, and virtually all riparian remnants were unsuitable to maintain a high occupancy probability for all species that responded to forest patch quality or structure. Beyond safeguarding legal compliance concerning riparian remnant amount, ensuring terrestrial vertebrate persistence in fragmented landscapes will require curbing the drivers of forest degradation within private landholdings.
陆地哺乳动物对亚马逊流域牧场景观中残留河岸森林栖息地结构和质量的反应
影响因子：
5.9
作者：
Zimbres B
通讯作者：
Zimbres B