Metapopulation dynamics of multiple species in a heterogeneous landscape

IF 7.1 1区 环境科学与生态学 Q1 ECOLOGY Ecological Monographs Pub Date : 2022-02-20 DOI:10.1002/ecm.1515
Jelena H. Pantel, Thomas Lamy, Maxime Dubart, Jean-Pierre Pointier, Philippe Jarne, Patrice David
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引用次数: 4

Abstract

Characterizing the diversity of demographic strategies among species can inform research in topics such as trait syndromes, community stability, coexistence, and ecological succession. However, this diversity can depend on the spatial scale considered: at the landscape scale, species often form metapopulations, that is sets of local, sometimes short-lived, populations, inhabiting discrete habitat patches. Metapopulation dynamics are most frequently analyzed in individual species or pairs of interacting species because of the large amount of data required for multiple species, and because species vary in their perceptions of what constitutes a favorable or unfavorable habitat. Here we evaluate, using a case study, whether a metapopulation model can be used to generate accurate estimates of demographic parameters and to describe the diversity of dynamics, responses to environment, and prospects of long-term persistence in a guild of species inhabiting a common fragmented landscape. We applied this approach to a guild of 22 mollusk species that inhabit freshwater habitats on two islands of Guadeloupe, to compare metapopulation dynamics among species. We analyzed a 15-year time series of occupancy records for 278 sites using a multistate occupancy model that estimated colonization and extinction rates as a function of site-specific and year-specific environmental covariates, then used model results to simulate future island metapopulation dynamics. Despite the diverse array of metapopulation trajectories—a mix of species with either stable, increasing, declining, or fluctuating metapopulations—and the inherent challenges associated with such data (e.g., imperfect detection, spatial and temporal heterogeneity), our model accurately captured among-patch variation in suitability for many mollusk taxa. The dynamics of rare species or species with habitat preferences not fully captured by the retained set of covariates were less well described. For several species, we detected a negative correlation between extinction and colonization. This variation in habitat suitability created species-specific extinction-resistant pockets in the landscape. Our comparative analysis also revealed that species had distinct strategies for metapopulation dynamics, such as “fast-turnover” species with both a high proportion of occupied sites and a high rate of site extinction in the landscape.

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异质景观中多物种的超种群动态
描述物种间人口统计策略的多样性可以为特征综合征、群落稳定性、共存和生态演替等主题的研究提供信息。然而,这种多样性可能取决于所考虑的空间尺度:在景观尺度上,物种通常形成元种群,即居住在离散栖息地斑块的本地种群,有时是短暂的种群。元种群动态最常在单个物种或相互作用的物种对中进行分析,因为多个物种需要大量的数据,并且因为物种对有利或不利栖息地的看法不同。在这里,我们通过一个案例研究来评估一个元种群模型是否可以用来产生准确的人口参数估计,并描述动态多样性,对环境的响应,以及居住在共同破碎景观中的物种的长期持久性前景。我们将这种方法应用于瓜德罗普两个岛屿淡水栖息地的22种软体动物种群,以比较物种之间的超种群动态。我们使用一个多状态占用模型分析了278个地点15年的占用记录序列,该模型估计了特定地点和特定年份的环境协变量的殖民化和灭绝率,然后使用模型结果模拟未来岛屿的超种群动态。尽管存在各种各样的超种群轨迹——包括稳定的、增加的、下降的或波动的超种群——以及与这些数据相关的固有挑战(例如,不完善的检测、空间和时间异质性),我们的模型准确地捕获了许多软体动物类群适宜性的斑块间变化。稀有物种或栖息地偏好未被保留的协变量集完全捕获的物种的动态描述不太好。对于一些物种,我们发现灭绝和定植之间呈负相关。这种栖息地适宜性的变化在景观中创造了物种特有的抗灭绝口袋。我们的比较分析还揭示了物种具有不同的超种群动态策略,如“快速周转”物种,在景观中占据的地点比例高,地点灭绝率高。
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来源期刊
Ecological Monographs
Ecological Monographs 环境科学-生态学
CiteScore
12.20
自引率
0.00%
发文量
61
审稿时长
3 months
期刊介绍: The vision for Ecological Monographs is that it should be the place for publishing integrative, synthetic papers that elaborate new directions for the field of ecology. Original Research Papers published in Ecological Monographs will continue to document complex observational, experimental, or theoretical studies that by their very integrated nature defy dissolution into shorter publications focused on a single topic or message. Reviews will be comprehensive and synthetic papers that establish new benchmarks in the field, define directions for future research, contribute to fundamental understanding of ecological principles, and derive principles for ecological management in its broadest sense (including, but not limited to: conservation, mitigation, restoration, and pro-active protection of the environment). Reviews should reflect the full development of a topic and encompass relevant natural history, observational and experimental data, analyses, models, and theory. Reviews published in Ecological Monographs should further blur the boundaries between “basic” and “applied” ecology. Concepts and Synthesis papers will conceptually advance the field of ecology. These papers are expected to go well beyond works being reviewed and include discussion of new directions, new syntheses, and resolutions of old questions. In this world of rapid scientific advancement and never-ending environmental change, there needs to be room for the thoughtful integration of scientific ideas, data, and concepts that feeds the mind and guides the development of the maturing science of ecology. Ecological Monographs provides that room, with an expansive view to a sustainable future.
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