Use of hedgerows by mammals in an intensive agricultural landscape
Use of hedgerows by mammals in an intensive agricultural landscape
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哺乳动物在集约化农业景观中使用树篱
DOI：
10.1016/j.agee.2020.107079
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
J. Dupras
中科院分区：
文献类型：
--
作者：
C. Pelletier;J. Théau;J. Dupras
农业集约化导致生境改变，有时导致生境丧失和随后的连通性丧失。在这些以农业为主的景观中，剩余的物种通常使用灌木篱笆，如防风林或河岸带，作为运动走廊，甚至作为栖息地。然而，对哺乳动物利用这些树篱的了解是有限的，可以通过使用高分辨率遥感数据来改善，这些数据是无偏见的，详细的和可重复的。本研究的目的是评估影响中型和大型哺乳动物使用树篱的属性，在situand遥感数据（包括激光雷达和多光谱图像）在魁北克省南部的农业为主的景观。选择了23个绿篱，并通过实地调查和遥感分析（如激光雷达指标和植被指数）进行了表征。从2018年春末到初秋，使用相机陷阱测量了每个树篱的野生动物频率。在所有23个绿篱中获得了431个哺乳动物检测。由此，记录了7种，它们都是机会主义的，并且很好地适应了农业环境。结果表明，在哺乳动物使用的树篱显着差异。基于AICc的排序较好的模型的系数表明，绿篱长度和它们的使用哺乳动物之间的正相关关系，和绿篱宽度的负相关关系。随着树木覆盖率和林下植被密度的增加，以及人类干扰的减少，哺乳动物对绿篱的使用也增加了。这些结果的特点是第一次的变量影响绿篱使用的一组广泛的中型和大型哺乳动物物种，并确认其使用的运动走廊和/或栖息地。这项研究还证实了从遥感结合实地数据得出的变量的互补作用。文献中经常引用的变量（如归一化差异植被指数、缺口）解释力较低，这也突出表明需要进一步探讨它们对哺乳动物的具体影响。本研究提供的信息支持了树篱在集约化农业景观中对野生动物保护所发挥的有益作用。管理指南以及未来的研究途径。
Agricultural intensification causes habitat modification, sometimes leading to habitat loss and subsequent loss of connectivity. Remaining species in these agriculture-dominated landscapes often use hedgerows, such as windbreaks or riparian strips, as movement corridors or even as habitats. However, the understanding of the use of these hedgerows by mammals is limited and could be improved with the use of high-resolution remote sensing data, which are unbiased, detailed and repeatable. The aim of this study was to assess the attributes that affect medium- and large-sized mammals’ use of hedgerows, within situand remotely sensed data (including LiDAR and multispectral images) in an agriculture-dominated landscape in southern Québec. Twenty-three hedgerows were selected and characterized with both field surveys and remote sensing analyses, like LiDAR metrics and vegetation indices. Wildlife frequentation of each hedgerow was measured using camera traps, from late spring to early fall in 2018. 431 mammal detections were obtained among all 23 hedgerows. From this, seven species were recorded, all of them opportunistic and well adapted to agricultural environment. Results showed significant differences in mammal use of hedgerows. Coefficients of the better-ranked models based on AICc indicated a positive relationship between hedgerow length and their use by mammals, and a negative relationship with the hedgerow width. Hedgerow use by mammals also increased as tree cover and understory density increased, and as human disturbance decreased. These results characterized for the first time the variables influencing hedgerow use by a broad set of medium- and large-sized mammal species and confirmed their use as movement corridors and/or habitat. This study also confirmed the complementary usefulness of variables derived from remote sensing combined with field data. The low explanatory power of variables often cited in the literature (e.g. NDVI, gappiness) also highlights the need to further explore their specific influence on mammals. The information provided by this study supports the beneficial role played by hedgerows for wildlife conservation in intensive agricultural landscapes. Management guidelines are provided as well as future research avenues.
影响因子：
5.8
作者：
Kuznetsova, Alexandra;Brockhoff, Per B.;Christensen, Rune H. B.
通讯作者：
Christensen, Rune H. B.