Seasonality, worker caste, and the interaction between island area and habitat type influence the thermal tolerance of ants on fragmented habitat islands.

IF 5.3 2区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Marine Life Science & Technology Pub Date : 2025-05-02 eCollection Date: 2025-08-01 DOI:10.1007/s42995-025-00288-8
Yuhao Zhao, Chenxiao Wu, Chi Man Leong, Jiaxin Li, Wei Lu, Yijuan Xu, Xingfeng Si, Nathan J Sanders
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引用次数: 0

Abstract

Habitat fragmentation is a major cause of biodiversity loss. Fragmentation can alter thermal conditions on the remaining patches, especially at habitat edges, but few studies have examined variations in thermal tolerance of species in fragmented habitats. Ants are sensitive to both habitat fragmentation and temperature changes, and are an ideal taxon for studying these impacts. Here, we focused on the dimorphic ant species Pheidole nodus in a fragmented habitat island system (Thousand island lake) in China. We assessed critical thermal maximum (CTmax), minimum (CTmin), and range (CTrange) temperatures for both minor (workers) and major workers (soldiers) of 2307 individuals from 117 edge and interior colonies across 9 islands during relatively hot and cold seasons. Using mixed-effect linear models, we explored the effects of island area, habitat type (edge vs. interior), season, and caste (worker vs. soldier) on CTmax, CTmin, and CTrange. We found temperatures were 1-3 °C higher in edge than interior sites in relatively hot season. Yet, only CTmax and CTrange in edge populations were higher than those of interior sites on smaller islands. CTmax was higher in relatively hot season and CTmin was lower in relatively cold season, indicating seasonal plasticity in thermal tolerance. Workers consistently had higher CTmax and lower CTmin than soldiers. These findings underscore the importance of seasonality, worker caste, and interactive effect between island area and habitat type in shaping thermal tolerance of a dominant dimorphic ant species on fragmented habitat islands. Our study provides a roadmap for integrating thermal biology into studies of how fragmentation impacts biodiversity.

Supplementary information: The online version contains supplementary material available at 10.1007/s42995-025-00288-8.

季节、工蚁等级以及岛屿面积与生境类型的相互作用影响破碎化生境岛屿上蚂蚁的热耐受性。
栖息地破碎化是生物多样性丧失的主要原因。破碎化可以改变剩余斑块的热条件,特别是在栖息地边缘,但很少有研究调查破碎化栖息地中物种的热耐受性变化。蚂蚁对栖息地破碎化和温度变化都很敏感,是研究这些影响的理想分类群。本文以中国千岛湖破碎化生境岛屿系统中的二态蚁种Pheidole nodus为研究对象。在相对炎热和寒冷的季节,我们评估了来自9个岛屿117个边缘和内陆殖民地的2307个个体的次要(工蚁)和主要工蚁(工蚁)的临界热最大值(CTmax)、最小值(CTmin)和范围(CTrange)温度。使用混合效应线性模型,我们探讨了岛屿面积、栖息地类型(边缘与内部)、季节和种姓(工人与士兵)对CTmax、CTmin和CTrange的影响。我们发现,在相对炎热的季节,边缘温度比内部温度高1-3°C。然而,只有边缘种群的CTmax和CTrange高于较小岛屿的内陆站点。相对热季CTmax较高,相对冷季CTmin较低,表现出热耐受性的季节性可塑性。工人的CTmax一直高于士兵,CTmin一直低于士兵。这些发现强调了季节性、工蚁等级以及岛屿面积和栖息地类型之间的相互作用对形成破碎化栖息地岛屿上优势二态蚁种的热耐受性的重要性。我们的研究为将热生物学整合到碎片化如何影响生物多样性的研究中提供了路线图。补充资料:在线版本包含补充资料,下载地址:10.1007/s42995-025-00288-8。
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
Marine Life Science & Technology
Marine Life Science & Technology MARINE & FRESHWATER BIOLOGY-
CiteScore
9.60
自引率
10.50%
发文量
58
期刊介绍: Marine Life Science & Technology (MLST), established in 2019, is dedicated to publishing original research papers that unveil new discoveries and theories spanning a wide spectrum of life sciences and technologies. This includes fundamental biology, fisheries science and technology, medicinal bioresources, food science, biotechnology, ecology, and environmental biology, with a particular focus on marine habitats. The journal is committed to nurturing synergistic interactions among these diverse disciplines, striving to advance multidisciplinary approaches within the scientific field. It caters to a readership comprising biological scientists, aquaculture researchers, marine technologists, biological oceanographers, and ecologists.
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