三种常见腹足动物在不同盐度下的存活率和摄食率差异

IF 3.8 2区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION
Elisabeth Renk, James W. E. Dickey, Ross N. Cuthbert, E. Kazanavičiūtė, Elizabeta Briski
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引用次数: 0

摘要

生物入侵率的不断上升对全球生态和经济构成了重大威胁。宠物贸易是一种主要的入侵途径,而环境变化可能会对这些被释放或逃逸的非本地物种(NNS)的成功建立和影响起到中介作用。盐度变化是水生生态系统中一种普遍存在但经常被忽视的环境变化。本研究通过评估三种现成的贸易螺类--Melanoides tuberculata、Tarebia granifera 和 Anentome helena--在不同盐度水平(0.2-16 克/千克)下的存活率和摄食反应,调查了它们的建立和影响风险。不同物种的存活率各不相同,M. tuberculata在整个盐度范围内的存活率接近100%,T. granifera在16克/千克的盐度下死亡率增加,而A. helena在12克/千克以上的盐度下没有存活。在评估抗逆性更强的M. tuberculata和T. granifera的喂食实验中,前者对植物(菠菜)和动物(水蚤)资源的消耗率更高。虽然盐度和密度效应不会影响动物的消耗,但它们都会对植物的消耗产生显著影响,在盐度为 8 克/千克的条件下,相对于淡水条件,两种动物的摄食量都会受到抑制。如果将M. tuberculata和T. granifera的存活率和资源消耗量按比例结合起来看,M. tuberculata对植物和动物资源的影响潜力更大,这突出表明它有可能对生态产生更大的影响。研究忽略了盐度对入侵成功的重要性以及宠物贸易物种的影响。因此,我们建议这些方法为评估贸易物种建立和产生影响的潜在风险提供一个筛选工具,我们鼓励未来的研究考虑更广泛的非生物压力因素。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Differential survival and feeding rates of three commonly traded gastropods across salinities
Increasing rates of biological invasions pose major ecological and economic threats globally. The pet trade is one major invasion pathway, and environmental change could mediate the successful establishment and impact of these released or escaped non-native species (NNS). Salinity regime shifts are a pervasive but often overlooked environmental change in aquatic ecosystems. This study investigates the establishment and impact risks posed by three readily available, traded snail species – Melanoides tuberculata, Tarebia granifera and Anentome helena – by assessing their survival and feeding responses across a spectrum of salinity levels (0.2–16 g/kg). Survival differed among the species, with M. tuberculata showing close to 100% survival across the salinity range, T. granifera exhibiting heightened mortality at 16 g/kg, and A. helena displaying no survival at salinities above 12 g/kg. In feeding experiments assessing the more resilient M. tuberculata and T. granifera, the former had greater consumption rates towards both plant- (spinach) and animal-based (daphniid) resources. While salinity and density effects did not affect animal consumption, they both had significant effects on plant consumption, with feeding suppressed for both consumers under a salinity of 8 g/kg relative to freshwater conditions. When combining proportional survival and resource consumption for M. tuberculata and T. granifera, M. tuberculata demonstrated higher impact potential towards both plant and animal resources, highlighting its potential to exert higher ecological impacts. Studies have overlooked the importance of salinity for invasion success and the impact of pet trade species. We therefore propose that these methods provide a screening tool to assess the potential risks of traded species establishing and exerting impacts, and we encourage future studies to account for a broader range of abiotic stressors.
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来源期刊
Neobiota
Neobiota Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
8.10
自引率
7.80%
发文量
0
审稿时长
6 weeks
期刊介绍: NeoBiota is a peer-reviewed, open-access, rapid online journal launched to accelerate research on alien species and biological invasions: aquatic and terrestrial, animals, plants, fungi and micro-organisms. The journal NeoBiota is a continuation of the former NEOBIOTA publication series; for volumes 1-8 see http://www.oekosys.tu-berlin.de/menue/neobiota All articles are published immediately upon editorial approval. All published papers can be freely copied, downloaded, printed and distributed at no charge for the reader. Authors are thus encouraged to post the pdf files of published papers on their homepages or elsewhere to expedite distribution. There is no charge for color.
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