利用顺序最低成本模型揭示多重引入:入侵野生蜜蜂物种的案例研究。

IF 3.7 2区 环境科学与生态学 Q1 ECOLOGY
Landscape Ecology Pub Date : 2025-01-01 Epub Date: 2025-08-14 DOI:10.1007/s10980-025-02188-9
Christa Rohrbach, Gudrun Wallentin, Jovana Bila Dubaić, Julia Lanner
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引用次数: 0

摘要

背景:入侵物种对生物多样性构成了重大威胁,因此需要准确的方法来评估它们的传播。虽然多次引种是常见的,但由于对种群结构的了解有限,对扩张率的估计往往假设一个单一的引种点。目的:本多学科研究旨在开发一种新的时空方法来描述潜在的种群,而不需要事先了解种群结构。我们将这种方法应用于雕刻树脂蜜蜂,欧洲第一个非本地蜜蜂物种,提供其在欧洲传播的区域扩张率估计。方法:对2008 ~ 2024年的观测资料进行分析。基于环境适宜性图,将序列最小成本模型应用于年度时间步长,通过最小成本路径将每个新的观测结果与最近的已知观测结果联系起来。通过排除高成本路径和分析剩余路径的连通性来划分种群,并使用距离回归法计算扩张率。结果:我们确定了两个种群,它们与法国、瑞士和奥地利地区已知的遗传群体一致。我们的模拟结果还表明,另外两个种群被引入意大利和塞尔维亚。膨胀速率在13.3 ~ 58.6 km/年之间变化,在膨胀阶段达到89.7 km/年的峰值,呈现出一致的s型扩张模式。结论:我们的时空方法描述了在没有事先遗传知识的情况下引入的种群,提高了扩展率的估计,并为入侵物种的目标遗传采样、监测和管理工作提供了信息。补充信息:在线版本包含补充资料,可在10.1007/s10980-025-02188-9获得。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Leveraging sequential least-cost modelling to uncover multiple introductions: a case study of an invasive wild bee species.

Context: Invasive species pose a significant threat to biodiversity, creating a need for accurate methods to assess their spread. Although multiple introductions are common, estimates of expansion rates often assume a single introduction site due to limited knowledge of population structure.

Objectives: This multidisciplinary study aimed to develop a novel spatio-temporal approach to delineate potential populations without prior knowledge of population structure. We applied this approach to the Sculptured Resin Bee, Europe's first non-native bee species, providing regional expansion rate estimates for its spread across Europe.

Methods: Observation data from 2008 to 2024 were analysed. Based on an environmental suitability map, sequential least-cost modelling was applied in annual time steps, linking each new observation to the nearest known observation via a least-cost path. Populations were delineated by excluding high-cost paths and analysing the connectivity of the remaining paths, and expansion rates were calculated using the distance regression method.

Results: We identified two populations, which align with known genetic groups in the area of France, Switzerland and Austria. Our modelling results also indicate two additional populations introduced to Italy and Serbia. Expansion rates ranged from 13.3 km/year to 58.6 km/year and peaked at 89.7 km/year during expansion phases, exhibiting a consistent sigmoidal expansion pattern.

Conclusions: Our spatio-temporal approach delineates introduced populations without prior genetic knowledge, improving expansion rate estimation and informing targeted genetic sampling, monitoring, and management efforts of invasive species.

Supplementary information: The online version contains supplementary material available at 10.1007/s10980-025-02188-9.

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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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