墨西哥 Sierra de Huautla 生物圈保护区无尾类的金属生物累积和组合属性

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-04-04 DOI:10.1177/19400829241245353

Eduardo Aarón Chávez-Ramírez, Patricia Mussali-Galante, Efraín Tovar-Sánchez, Leticia M. Ochoa-Ochoa, Norman Mercado-Silva

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引用次数: 0

摘要

背景与研究目的：人为金属的形态学和生理学影响一直是瓦乌特拉山脉生物圈保护区（REBIOSH，墨西哥）多项研究的重点，但人们对这些金属如何影响该地区的无尾类动物知之甚少。我们评估了REBIOSH溪流中无尾类的金属生物累积情况，并考察了与废弃尾矿相对的不同位置的五个地点的无尾类群落：方法：三个和两个地点分别位于矿山尾矿的上游和下游。我们收集了无尾类群落信息，并在每个地点采集了沉积物、水和肝脏样本进行金属定量：结果：水体中铜、铅、锌和锰的浓度，以及沉积物中锌、锰、铁和铬的浓度在不同地点之间存在显著差异。我们在具有不同生活特征的 Smilisca baudinii、Lithobates spectabilis、L. zweifeli 和 Rhinella horribilis 的肝脏中发现了铅、锌和铁的生物累积。我们发现不同地点的物种丰富度和多样性相似。群落以 L. zweifeli、R. horribilis 和 S. baudinii 为主。在远离尾矿的地点，其优势度最高。Agalychnis dacnicolor、Tlalocohyla smithii 和 Hypopachus variolosus 只出现在最靠近尾矿的地点：我们没有发现金属生物累积对无尾动物群落的影响，但我们的研究结果表明，金属生物累积可能会对保护区内的某些物种产生影响。我们的研究结果为今后探索该地区的金属影响奠定了基础：有毒金属的生物累积有可能降低无尾类动物的遗传变异性，改变其性比例和繁殖力，从而有可能导致无尾类动物的灭绝。我们首次提供了保护区内无尾目动物体内金属生物累积的证据，这也是为数不多的关于保护区内无尾目动物群落的研究之一。我们的证据可作为改善这一生物多样性热点地区遗留金属采矿影响的指导。

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Metal Bioaccumulation and Assemblage Attributes for Anurans in the Sierra de Huautla Biosphere Reserve, Mexico

Background and Research Aims: Morphological and physiological effects of anthropogenic metals have been the focus of several studies in the Sierra de Huautla Biosphere Reserve (REBIOSH, Mexico) but little is known about how they affect anurans in the area. We evaluated metal bioaccumulation in anurans from streams in the REBIOSH and examined anuran communities in five sites at different positions relative to abandoned mine tailings.Methods: Three and two sites were located upstream and downstream from mine tailings, respectively. We collected anuran community information and obtained sediment, water and liver samples for metal quantification from each site.Results: Concentrations of Cu, Pb, Zn and Mn in water, and Zn, Mn, Fe and Cr in sediment, were significantly different among sites. We found bioaccumulation of Pb, Zn and Fe in livers of Smilisca baudinii, Lithobates spectabilis, L. zweifeli and Rhinella horribilis, species with different life traits. We found similar among-site species richness and diversity. Communities were dominated by L. zweifeli, R. horribilis and S. baudinii. Dominance was highest in sites distant from mine tailings. Agalychnis dacnicolor, Tlalocohyla smithii and Hypopachus variolosus were only present in sites located closest to mine tailings.Conclusion: We did not detect an effect of metal bioacummulation on anuran communities, but our findings suggest a potential effect on certain species in the protected area. Our results form a baseline for future explorations of the impacts of metals in the region.Implications for Conservation: Toxic metal bioaccumulation has potential for reducing anuran genetic variability and altering sexual proportions and fecundity, potentially leading to anuran extirpations. We provide first evidence for metal bioaccumulation in anurans in the protected area, and one of few studies on its anuran communities. Our evidence can serve as guidance to ameliorate effects of legacy metal mining in this biodiversity hotspot.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.