Large-landscape connectivity models for pond-dwelling species: methods and application to two invasive amphibians of global concern

IF 4 2区 环境科学与生态学 Q1 ECOLOGY Landscape Ecology Pub Date : 2024-03-18 DOI:10.1007/s10980-024-01858-4
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引用次数: 0

Abstract

Context

Functional connectivity models are essential in identifying major dispersal pathways and developing effective management strategies for expanding populations of invasive alien species. However, the extrapolation of models parameterized within current invasive ranges may not be applicable even to neighbouring areas, if the models are not based on the expected responses of individuals to landscape structure.

Objectives

We have developed a high-resolution connectivity model for both terrestrial and aquatic habitats using solely potential sources. The model is used here for the invasive, principally-aquatic, African clawed frog Xenopus laevis, which is a species of global concern.

Methods

All ponds were considered as suitable habitats for the African clawed frog. Resistance costs of lotic aquatic and terrestrial landscape features were determined through a combination of remote sensing and laboratory trials. Maximum cumulative resistance values were obtained via capture-mark-recapture surveys, and validation was performed using independently collected presence data. We applied this approach to an invasive population of the American bullfrog, Lithobates catesbeianus, in France to assess its transferability to other pond-dwelling species.

Results

The model revealed areas of high and low functional connectivity. It primarily identified river networks as major dispersal pathways and pinpointed areas where local connectivity could be disrupted for management purposes.

Conclusion

Our model predicts how the dispersal of individuals connect suitable lentic habitats, through river networks and different land use types. The approach can be applied to species of conservation concern or interest in pond ecosystems and other wetlands, including aquatic insects, birds and mammals, for which distribution data are limited or challenging to collect. It serves as a valuable tool for forecasting colonization pathways in expanding populations of both native and invasive alien species and for identifying regions suitable for preventive or adaptive control measures.

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池塘栖息物种的大地貌连通性模型:方法及对两种全球关注的入侵两栖动物的应用
摘要 背景 功能连通性模型对于确定外来入侵物种的主要扩散途径和制定有效的扩大种群管理策略至关重要。然而,如果模型不是基于个体对景观结构的预期反应,那么在当前入侵范围内参数化的模型推断甚至可能不适用于邻近地区。 目标 我们仅利用潜在来源为陆生和水生栖息地开发了一个高分辨率连接模型。该模型主要用于全球关注的入侵性水生非洲爪蛙(Xenopus laevis)。 方法 所有池塘都被视为非洲爪蛙的合适栖息地。通过遥感和实验室试验相结合的方法确定了地段水生和陆地景观的阻力成本。通过捕获-标记-再捕获调查获得了最大累积阻力值,并利用独立收集的存在数据进行了验证。我们将这种方法应用于法国的美国牛蛙(Lithobates catesbeianus)入侵种群,以评估其对其他池塘栖息物种的可移植性。 结果 该模型揭示了功能连通性较高和较低的区域。它主要将河网确定为主要的扩散途径,并指出了出于管理目的可能破坏当地连通性的区域。 结论 我们的模型可以预测个体如何通过河网和不同的土地利用类型散布到合适的湖泊栖息地。该方法可用于池塘生态系统和其他湿地中受保护或感兴趣的物种,包括水生昆虫、鸟类和哺乳动物,因为这些物种的分布数据有限或难以收集。该方法是一种宝贵的工具,可用于预测本地物种和外来入侵物种在不断扩大的种群中的定殖路径,并确定适合采取预防性或适应性控制措施的区域。
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来源期刊
Landscape Ecology
Landscape Ecology 环境科学-地球科学综合
CiteScore
8.30
自引率
7.70%
发文量
164
审稿时长
8-16 weeks
期刊介绍: Landscape Ecology is the flagship journal of a well-established and rapidly developing interdisciplinary science that focuses explicitly on the ecological understanding of spatial heterogeneity. Landscape Ecology draws together expertise from both biophysical and socioeconomic sciences to explore basic and applied research questions concerning the ecology, conservation, management, design/planning, and sustainability of landscapes as coupled human-environment systems. Landscape ecology studies are characterized by spatially explicit methods in which spatial attributes and arrangements of landscape elements are directly analyzed and related to ecological processes.
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