Glacier retreat decreases mutualistic network robustness over spacetime

IF 5.4 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION
Ecography Pub Date : 2024-11-05 DOI:10.1111/ecog.07558
Matteo Conti, Pierfilippo Cerretti, Andrea Ferrari, Paolo Gabrieli, Francesco Paone, Carlo Polidori, Daniele Sommaggio, Gianalberto Losapio
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引用次数: 0

Abstract

Glaciers are retreating worldwide at an ever‐increasing rate, exposing new ice‐free areas to ecological succession. This process leads to changes in biodiversity and potentially to novel species interactions. However, we still have a limited understanding of how glacier retreat influences species interaction networks, particularly the structure and robustness of mutualistic networks. After reconstructing plant–pollinator networks along a 140‐years chronosequence on a glacier foreland, we address the effects of glacier retreat on network structure and robustness. Our results show that the prevalence of different network motifs changes over spacetime, leading to a decrease of network robustness. With glacier retreat, mutualistic networks shift from highly connected with diverse specialist interactions to loosely connected with few generalist interactions. Furthermore, despite the turnover of plant species, we find that species structural roles remain constant over spacetime while depending on species identity. Our findings suggest that glacier retreat reshuffles mutualistic networks with motifs posing low robustness, leading to increased fragility. Understanding the assembly and breaking down of species interaction networks provides novel insights into the development and stability of novel, post‐glacial ecological systems facing glacier extinction.
冰川退缩降低了互惠网络在时空中的稳健性
世界各地的冰川正在以越来越快的速度后退,使新的无冰地区面临生态演替。这一过程会导致生物多样性的变化,并可能产生新的物种相互作用。然而,我们对冰川退缩如何影响物种互动网络,特别是互惠网络的结构和稳健性的了解仍然有限。在对冰川前缘140年时间序列上的植物传粉者网络进行重建后,我们探讨了冰川退缩对网络结构和稳健性的影响。我们的研究结果表明,随着时间的推移,不同网络模式的普遍性会发生变化,从而导致网络稳健性下降。随着冰川退缩,互生网络从具有多种专科相互作用的高度连接转变为具有少数通科相互作用的松散连接。此外,尽管植物物种更替频繁,但我们发现物种结构作用在时空上保持不变,而取决于物种身份。我们的研究结果表明,冰川退缩重新洗牌了具有低稳健性图案的互惠网络,导致脆弱性增加。了解物种相互作用网络的组装和分解,为我们了解面临冰川消亡的新型冰川后生态系统的发展和稳定性提供了新的视角。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ecography
Ecography 环境科学-生态学
CiteScore
11.60
自引率
3.40%
发文量
122
审稿时长
8-16 weeks
期刊介绍: ECOGRAPHY publishes exciting, novel, and important articles that significantly advance understanding of ecological or biodiversity patterns in space or time. Papers focusing on conservation or restoration are welcomed, provided they are anchored in ecological theory and convey a general message that goes beyond a single case study. We encourage papers that seek advancing the field through the development and testing of theory or methodology, or by proposing new tools for analysis or interpretation of ecological phenomena. Manuscripts are expected to address general principles in ecology, though they may do so using a specific model system if they adequately frame the problem relative to a generalized ecological question or problem. Purely descriptive papers are considered only if breaking new ground and/or describing patterns seldom explored. Studies focused on a single species or single location are generally discouraged unless they make a significant contribution to advancing general theory or understanding of biodiversity patterns and processes. Manuscripts merely confirming or marginally extending results of previous work are unlikely to be considered in Ecography. Papers are judged by virtue of their originality, appeal to general interest, and their contribution to new developments in studies of spatial and temporal ecological patterns. There are no biases with regard to taxon, biome, or biogeographical area.
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