南加勒比海(哥伦比亚)河口鱼类的营养龛以及红树林与渔业之间因果关系的证据

IF 2.2 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Luis Alejandro Sandoval, Tibor Erős
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引用次数: 0

摘要

人们对河口鱼类群落的营养组织知之甚少。我们利用稳定同位素(δ13C 和 δ15N)将阿特拉托河三角洲(哥伦比亚)最丰富的鱼类划分为营养级。我们研究了营养龛位以及营养类群丰度(单位努力量捕获量)与环境变量之间的关系。底栖动物是最主要的营养类群。根据贝叶斯估计的标准椭圆面积,肉食动物(25.3‰2)和浮游动物(24.4‰2)的同位素生态位宽度比杂食动物(7.8‰2)和底栖生物(3.1‰2)更显著。重叠组合显示,食肉动物与浮游动物之间以及食肉动物与杂食动物之间的同位素重叠概率为中等(≈50%)。同位素生态位大小和重叠表明鱼类群落食物来源的多样性和相当程度的生态位隔离。红树林面积是解释杂食性动物和动物底栖动物丰度的主要因素,这证明红树林生境与当地渔业生产之间的因果关系可以通过红树林和红树林相关来源的营养贡献来解释。研究结果强调了红树林区域在鱼类群落营养组织中的重要性,可为旨在管理渔业对生态系统的影响和保护加勒比海南部广阔红树林区域的战略提供信息。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Trophic niches of estuarine fish and evidence of mangrove-fishery causal links in the Southern Caribbean (Colombia)

Trophic niches of estuarine fish and evidence of mangrove-fishery causal links in the Southern Caribbean (Colombia)

The trophic organization of estuarine fish communities is poorly known. We used Stable Isotopes (δ13C and δ15N) to classify the most abundant fishes of the Atrato River Delta (Colombia) into trophic guilds. We examined trophic niches and the relationships between the abundance of the trophic guilds (catch per unit effort) and environmental variables. The zoobenthivores were the dominant trophic guild. The isotopic niche width, based on Bayesian estimate of the standard ellipse areas, was more significant for carnivores (25.3‰2) and planktivores (24.4‰2) than for omnivores (7.8‰2) and phytobenthivores (3.1‰2). The overlap combinations showed a medium probability of isotopic overlap (≈50%) between carnivores and planktivores and between carnivores and omnivores. Isotopic niche size and overlap suggested diversity in food sources and considerable niche segregation of the fish community. Mangrove area was the main factor explaining the abundance of omnivores and zoobenthivores, supporting that the causal links between mangrove habitat and local fishery production may be explained through the trophic contribution of mangroves and mangrove-related sources. The results underscore the importance of mangrove areas in the trophic organization of fish communities and can inform strategies aimed at managing the ecosystem impacts of fishing and protecting extensive mangrove areas in the southern Caribbean.

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来源期刊
Hydrobiologia
Hydrobiologia 生物-海洋与淡水生物学
CiteScore
5.40
自引率
11.50%
发文量
288
审稿时长
4.9 months
期刊介绍: Hydrobiologia publishes original research, reviews and opinions regarding the biology of all aquatic environments, including the impact of human activities. We welcome molecular-, organism-, community- and ecosystem-level studies in contributions dealing with limnology and oceanography, including systematics and aquatic ecology. Hypothesis-driven experimental research is preferred, but also theoretical papers or articles with large descriptive content will be considered, provided they are made relevant to a broad hydrobiological audience. Applied aspects will be considered if firmly embedded in an ecological context.
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