Terrestrial invasive species alter marine vertebrate behaviour.
Terrestrial invasive species alter marine vertebrate behaviour.
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DOI：
10.1038/s41559-022-01931-8
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发表时间：
2023-01
影响因子：
16.8
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中科院分区：
文献类型：
--
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人类引起的环境变化，如引入入侵物种，正在导致营养物质在生态系统中的流动下降，对生态系统功能产生负面影响。因此，养分输入的减少可能在更高的营养水平和更广泛的生态尺度上产生连锁效应，但这些相互关系仍然相对未知。在这里，我们表明，陆地入侵物种（黑鼠，Rattus rattus）破坏了海鸟提供的营养途径，最终改变了珊瑚礁鱼类的领土行为。在一个复制的生态系统规模的自然实验中，我们发现，珊瑚礁鱼的领土更大，时间投资于侵略较低的珊瑚礁附近的老鼠出没的岛屿相比，无鼠岛屿。这种反应反映了低质量资源的经济可持续性的变化，珊瑚鱼获得每单位觅食努力的营养收益较少的老鼠出没的岛屿附近的海鸟种群低。这些结果提供了一个新的见解如何破坏营养流的入侵物种可以影响领土行为的变化。因此，灭鼠作为一种保护策略，有可能通过领土恢复物种之间的相互作用，这可以扩大到影响更高生态水平的种群和社区。在印度洋10个岛屿上进行的一项复制生态系统规模的自然实验中，入侵的黑老鼠破坏了海鸟提供的营养，导致珊瑚礁鱼拥有更大的领土，并且比在无老鼠的岛屿上投入更少的时间进行侵略。
Human-induced environmental changes, such as the introduction of invasive species, are driving declines in the movement of nutrients across ecosystems with negative consequences for ecosystem function. Declines in nutrient inputs could thus have knock-on effects at higher trophic levels and broader ecological scales, yet these interconnections remain relatively unknown. Here we show that a terrestrial invasive species (black rats, Rattus rattus) disrupts a nutrient pathway provided by seabirds, ultimately altering the territorial behaviour of coral reef fish. In a replicated ecosystem-scale natural experiment, we found that reef fish territories were larger and the time invested in aggression lower on reefs adjacent to rat-infested islands compared with rat-free islands. This response reflected changes in the economic defendability of lower-quality resources, with reef fish obtaining less nutritional gain per unit foraging effort adjacent to rat-infested islands with low seabird populations. These results provide a novel insight into how the disruption of nutrient flows by invasive species can affect variation in territorial behaviour. Rat eradication as a conservation strategy therefore has the potential to restore species interactions via territoriality, which can scale up to influence populations and communities at higher ecological levels. In a replicated ecosystem-scale natural experiment across ten islands in the Indian Ocean, invasive black rats disrupted nutrients provided by seabirds, leading to a coral reef fish having larger territories and investing less time in aggression than on rat-free islands.
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影响因子：
1.7
作者：
Di Paola, Valentina;Vullioud, Philippe;Ros, Albert F. H.
通讯作者：
Ros, Albert F. H.
影响因子：
2.7
作者：
FROST, SK;FROST, PGH
通讯作者：
FROST, PGH
影响因子：
2.5
作者：
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通讯作者：
Gochfeld, Deborah J.
影响因子：
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作者：
Gordon, T. A. C.;Cowburn, B.;Sluka, R. D.
通讯作者：
Sluka, R. D.
影响因子：
2.5
作者：
Grant, JWA;Girard, IL;Weir, LK
通讯作者：
Weir, LK