接触多氯联苯(PCBs)的水生雌雄同体蜗牛死亡率增加、繁殖减少和内分泌紊乱

IF 0.5 4区环境科学与生态学 Q4 BIODIVERSITY CONSERVATION

Northeastern Naturalist Pub Date : 2022-10-03 DOI:10.1656/045.029.0309

Terri L. Provost, T. McCarthy

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引用次数: 0

摘要

摘要-全球淡水腹足类的数量正在减少。为了研究衰退的一个方面，我们将生活在海底的雌雄同体蜗牛Planorbella（=Helisoma）trivolvis（Say）（Marsh Rams horn）暴露于多氯联苯（PCBs）中。沼泽公羊角是一种同时存在的雌雄同体，这表明繁殖成功的破坏与蜗牛的相互作用无关，更依赖于内部控制。我们研究了接触多氯联苯对死亡率、生殖成功率和组织激素浓度的影响。暴露于自然栖息地中发现的浓度的Aroclor®1254会导致更高的死亡率和降低繁殖成功率。此外，暴露于多氯联苯的蜗牛的组织雌激素显著升高，而睾酮则没有变化。鉴于雌雄同体淡水腹足类在生态系统中的重要性、全球人口的减少以及多氯联苯的普遍存在，识别暴露的影响将为我们对抗人口减少提供信息。

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Aquatic Hermaphrodite Snails Exposed to Polychlorinated Biphenyls (PCBs) Experience Increased Mortality, Reduced Reproduction, and Endocrine Disruption

Abstract - Populations of freshwater gastropods are decreasing globally. To investigate one aspect of decline, we exposed the benthic dwelling hermaphroditic snail Planorbella (= Helisoma) trivolvis (Say) (Marsh Rams-horn) to polychlorinated biphenyls (PCBs). Marsh Rams-horn is a simultaneous hermaphrodite, suggesting that disruption of reproductive success is independent of snail interaction and more dependent on internal controls. We examined the impact of exposure to PCBs on mortality, reproductive success, and tissue hormone concentrations. Exposure to Aroclor®1254 in concentrations found in natural habitats caused higher mortality and reduced reproductive success. Additionally, tissue estrogens were significantly elevated while testosterone remined unchanged in PCB-exposed snails. Given the importance of hermaphroditic freshwater gastropods in ecosystems, worldwide population decline, and ubiquity of PCBs, identifying the impact of exposure informs our ability to combat population loss.

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来源期刊

Northeastern Naturalist 环境科学-生态学

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

18-36 weeks

期刊介绍： The Northeastern Naturalist covers all aspects of the natural history sciences of terrestrial, freshwater, and marine organisms and the environments of the northeastern portion of North America, roughly bounded from Virginia to Missouri, north to Minnesota and Nunavut, east to Newfoundland, and south back to Virginia. Manuscripts based on field studies outside of this region that provide information on species within this region may be considered at the Editor’s discretion. The journal welcomes manuscripts based on observations and research focused on the biology of terrestrial, freshwater, and marine organisms and communities as it relates to their life histories and their function within, use of, and adaptation to the environment and the habitats in which they are found, as well as on the ecology and conservation of species and habitats. Such studies may encompass measurements, surveys, and/or experiments in the field, under lab conditions, or utilizing museum and herbarium specimens. Subject areas include, but are not limited to, anatomy, behavior, biogeography, biology, conservation, evolution, ecology, genetics, parasitology, physiology, population biology, and taxonomy. Strict lab, modeling, and simulation studies on natural history aspects of the region, without any field component, will be considered for publication as long as the research has direct and clear significance to field naturalists and the manuscript discusses these implications.