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Modelling the functional connectivity of landscapes for greater horseshoe bats Rhinolophus ferrumequinum at a local scale
Landscape Ecology ( IF 4.0 ) Pub Date : 2020-02-18 , DOI: 10.1007/s10980-019-00953-1
Domhnall Finch , Diana P. Corbacho , Henry Schofield , Sophie Davison , Patrick G. R. Wright , Richard K. Broughton , Fiona Mathews

The importance of habitat connectivity for wildlife is widely recognised. However, assessing the movement of species tends to rely on radio-tracking or GPS evidence, which is difficult and costly to gather. To examine functional connectivity of greater horseshoe bats (GHS, Rhinolophus ferrumequinum) at a local scale using Circuitscape software; comparing our results against expert opinion ‘fly ways’. Expert opinions were used to rank and score five environmental layers influencing GHS movement, generating resistance scores. The slope and resistance scores of these layers were varied, and validated against independent ground truthed GHS activity data, until a unimodal peak in correlation was identified for each layer. The layers were combined into a multivariate model and re-evaluated. Radio-tracking studies were used to further validate the model, and the transferability was tested at other roost locations. Functional connectivity models could be created using bat activity data. Models had the ability to be transferred between roost locations, although site-specific validation is strongly recommended. For all other bat species recorded, markedly more (125%) bat passes occurred in the top quartile of functional connectivity compared to any of the lower three quartiles. The model predictions identify areas of key conservation importance to habitat connectivity for GHS that are not recognised by expert opinion. By highlighting landscape features that act as barriers to movement, this approach can be used by decision-makers as a tool to inform local management strategies.

中文翻译:

在局部尺度上为更大的马蹄蝠 Rhinolophus ferrumequinum 的景观功能连通性建模

栖息地连通性对野生动物的重要性得到广泛认可。然而,评估物种的运动往往依赖于无线电跟踪或 GPS 证据,收集起来既困难又昂贵。使用 Circuitscape 软件在本地范围内检查大型马蹄蝠(GHS、Rhinolophus ferrumequinum)的功能连接;将我们的结果与专家意见“飞行方式”进行比较。专家意见被用来对影响 GHS 运动的五个环境层进行排名和评分,从而产生阻力分数。这些层的斜率和阻力分数是不同的,并根据独立的地面真实 GHS 活动数据进行验证,直到为每一层确定了相关性的单峰峰值。这些层被组合成一个多变量模型并重新评估。无线电跟踪研究用于进一步验证模型,并在其他栖息地测试了可转移性。可以使用蝙蝠活动数据创建功能连接模型。尽管强烈建议进行特定地点的验证,但模型能够在栖息地之间转移。对于记录的所有其他蝙蝠物种,与较低的三个四分位数中的任何一个相比,在功能连接的前四分位数中发生的蝙蝠传球次数明显更多(125%)。模型预测确定了专家意见未认可的对 GHS 栖息地连通性具有关键保护重要性的区域。通过突出作为移动障碍的景观特征,这种方法可以被决策者用作告知当地管理策略的工具。可以使用蝙蝠活动数据创建功能连接模型。尽管强烈建议进行特定地点的验证,但模型能够在栖息地之间转移。对于记录的所有其他蝙蝠物种,与较低的三个四分位数中的任何一个相比,在功能连接的前四分位数中发生的蝙蝠传球次数明显更多(125%)。模型预测确定了专家意见未认可的对 GHS 栖息地连通性具有关键保护重要性的区域。通过突出作为移动障碍的景观特征,这种方法可以被决策者用作告知当地管理策略的工具。可以使用蝙蝠活动数据创建功能连接模型。尽管强烈建议进行特定地点的验证,但模型能够在栖息地之间转移。对于记录的所有其他蝙蝠物种,与较低的三个四分位数中的任何一个相比,在功能连接的前四分位数中发生的蝙蝠传球次数明显更多(125%)。模型预测确定了专家意见未认可的对 GHS 栖息地连通性具有关键保护重要性的区域。通过突出作为移动障碍的景观特征,这种方法可以被决策者用作告知当地管理策略的工具。与较低的三个四分位数中的任何一个相比,在功能连接的前四分位数中发生了明显更多 (125%) 的蝙蝠传球。模型预测确定了专家意见未认可的对 GHS 栖息地连通性具有关键保护重要性的区域。通过突出作为移动障碍的景观特征,这种方法可以被决策者用作告知当地管理策略的工具。与较低的三个四分位数中的任何一个相比,在功能连接的前四分位数中发生了明显更多 (125%) 的蝙蝠传球。模型预测确定了专家意见未认可的对 GHS 栖息地连通性具有关键保护重要性的区域。通过突出作为移动障碍的景观特征,这种方法可以被决策者用作告知当地管理策略的工具。
更新日期:2020-02-18
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