Contaminant levels and their effects on the American continent chelonian: A systematic review

IF 1.1 4区 生物学 Q4 ANATOMY & MORPHOLOGY
Acta Zoologica Pub Date : 2025-03-29 DOI:10.1111/azo.12550
Fernanda Victoria Nery Dias, Lucas Maia Garcês, Adriano Teixeira de Oliveira
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Abstract

Excessive metal pollution from anthropogenic activities like mining and industrial waste discharge has increasingly impacted freshwater ecosystems. Freshwater chelonians (Testudines) are bioindicators of environmental pollution because of their longevity, ecological diversity, and trophic positioning. This systematic review assessed toxic metal bioaccumulation in freshwater turtles across the American continent, focusing on mercury (Hg), a global public health and ecological concern. A comprehensive search on PubMed, Scopus and Web of Science identified 620 papers, of which 32 met the inclusion criteria. The United States and Brazil (93.6%) contributed the most data, with Chelydra serpentina and Podocnemis expansa frequently studied, followed by Canada (4.26%) and Colombia (2.13%). Hg was the predominant contaminant (75% of studies), with the highest concentrations observed in hatchlings and keratinized tissues, such as carapace and claws. Bioaccumulation patterns varied by region, species and life stage, emphasizing physiological and reproductive impacts. This review highlights the need for noninvasive sampling methods and long-term monitoring to guide conservation strategies and assess ecosystem and turtle health. It also highlights the significant lack of data in South America and the lack of studies on juveniles and eggs. Freshwater chelonians remain essential for understanding contamination dynamics and mitigating environmental degradation in aquatic habitats.

污染物水平及其对美洲大陆龟类的影响:系统综述
采矿和工业废物排放等人为活动造成的过量金属污染对淡水生态系统的影响日益严重。淡水龟类(Testudines)因其寿命长、生态多样性和营养定位而成为环境污染的生物指标。本系统综述评估了美洲大陆淡水龟体内有毒金属的生物积累,重点关注汞(Hg)这一全球公共卫生和生态问题。在PubMed, Scopus和Web of Science上进行全面搜索,确定了620篇论文,其中32篇符合纳入标准。美国和巴西(93.6%)提供了最多的数据,对蛇Chelydra serpentina和Podocnemis expansa进行了频繁研究,其次是加拿大(4.26%)和哥伦比亚(2.13%)。汞是主要污染物(75%的研究),在幼龟和角化组织(如甲壳和爪子)中观察到的浓度最高。生物积累模式因地区、物种和生命阶段而异,强调生理和生殖影响。这篇综述强调了非侵入性采样方法和长期监测的必要性,以指导保护策略和评估生态系统和海龟健康。它还强调了南美洲数据的严重缺乏以及对幼鱼和卵的研究的缺乏。淡水龟类对了解污染动态和减轻水生生境环境退化至关重要。
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
Acta Zoologica
Acta Zoologica 生物-动物学
CiteScore
2.90
自引率
8.30%
发文量
35
审稿时长
>12 weeks
期刊介绍: Published regularly since 1920, Acta Zoologica has retained its position as one of the world''s leading journals in the field of animal organization, development, structure and function. Each issue publishes original research of interest to zoologists and physiologists worldwide, in the field of animal structure (from the cellular to the organismic level) and development with emphasis on functional, comparative and phylogenetic aspects. Occasional review articles are also published, as well as book reviews.
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