Rising temperatures, falling fisheries: causes and consequences of crossing the tipping point in a small-pelagic community

IF 5.9 1区 农林科学 Q1 FISHERIES Reviews in Fish Biology and Fisheries Pub Date : 2024-08-14 DOI:10.1007/s11160-024-09885-9
Joana Vasconcelos, Jose A. Sanabria-Fernandez, Víctor M. Tuset, Ricardo Sousa, Graça Faria, Rodrigo Riera
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Abstract

Global change has profound effects on marine species, communities, and ecosystems. Among these impacts, small pelagics have emerged as valuable indicators for detecting regime shifts in fish stocks. They exhibit swift responses to changes in ocean variables, including decreased abundances, accelerated juvenile growth rates, early maturation, and reduced adult sizes in warm waters. However, each pelagic species occupies a unique local ecological niche, that reflects the sum of all environmental conditions. Consequently, their responses to environmental changes manifest in distinct ways. We explore here how global change affects small pelagics in the Madeira Archipelago (NE Atlantic Ocean) at (i) community level, by studying the effects of climate change over a 40-year (1980–2019) period on small pelagic landings, and (ii) population level, by studying the effects on the life-history traits of the two most abundant species, Scomber colias and Trachurus picturatus. Our study demonstrated that anomalies in the Sea Surface Temperature and the North Atlantic Oscillation caused a regime shift within the small pelagic community. Both environmental predictors explained 88.9% of the community landings oscillations. S. colias appears to exhibit a relatively more favorable adaptive response to climate change compared to T. picturatus. Understanding the species-specific ecological responses of small pelagic fish to global change is crucial for effective management and conservation efforts in the face of ongoing environmental scenarios.

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气温升高,渔业衰退:一个小型中上层生物群落越过临界点的原因和后果
全球变化对海洋物种、群落和生态系统有着深远的影响。在这些影响中,小型中上层鱼类已成为检测鱼类种群变化的重要指标。它们对海洋变量的变化反应迅速,包括数量减少、幼鱼生长速度加快、早熟以及在温暖水域成鱼体型缩小。然而,每种中上层鱼类都占据着独特的局部生态位,反映了所有环境条件的总和。因此,它们对环境变化的反应也各不相同。我们在此探讨了全球变化如何在以下两个层面影响马德拉群岛(大西洋东北部)的小型中上层鱼类:(i) 群落层面,通过研究 40 年(1980-2019 年)期间气候变化对小型中上层鱼类上岸量的影响;(ii) 种群层面,通过研究对两种最丰富鱼类 Scomber colias 和 Trachurus picturatus 生命史特征的影响。我们的研究表明,海洋表面温度和北大西洋涛动的异常现象导致了小型中上层鱼类群落的制度转变。这两个环境预测因子解释了群落上岸量波动的 88.9%。与 T. picturatus 相比,S. colias 似乎对气候变化表现出更有利的适应性反应。面对不断变化的环境情景,了解小型中上层鱼类物种对全球变化的生态响应对于有效的管理和保护工作至关重要。
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来源期刊
Reviews in Fish Biology and Fisheries
Reviews in Fish Biology and Fisheries 农林科学-海洋与淡水生物学
CiteScore
10.00
自引率
8.10%
发文量
42
审稿时长
12-24 weeks
期刊介绍: The subject matter is focused on include evolutionary biology, zoogeography, taxonomy, including biochemical taxonomy and stock identification, genetics and genetic manipulation, physiology, functional morphology, behaviour, ecology, fisheries assessment, development, exploitation and conservation. however, reviews will be published from any field of fish biology where the emphasis is placed on adaptation, function or exploitation in the whole organism.
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