Temperature-dependent interaction between an invasive and a native freshwater gastropod: a competitive edge for the invader?

Q3 Agricultural and Biological Sciences Biological Letters Pub Date : 2022-04-22 DOI:10.2478/biolet-2021-0002
R. Karmakar, P. Paul, Sujeeta De, D. Mondal, G. Aditya
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引用次数: 1

Abstract

Abstract Multiple studies have focused on the environmental damage done by invasive species and highlighted them as a major threat to biodiversity. Invasive species can completely eliminate some native species. On the other hand, the invasion potential of alien species is strongly influenced by abiotic factors. Taking these factors into consideration, the present study has focused on the competitive interaction between an invasive freshwater pulmonate snail Physella acuta Draparnaud, 1805 (Gastropoda: Physidae) and sympatrically occurring Racesina luteola Lamarck, 1822 (Gastropoda: Lymnaeidae) in India. Competitive superiority of the exotic species was assessed by comparing the reproductive output of the invasive and indigenous species subjected to interactions observed in a community. To investigate the role of temperature as a driving force of the competitive superiority of the invasive snail, 4 temperatures were considered. At all temperatures, the invasive snail P. acuta deposited more egg clutches per individual than the native snail R. luteola did, irrespective of the interaction types. The reproductive output of both species increased with the gradual increase in temperature up to 30°C. At 35°C, the production of egg capsules (clutches) per individual and eggs per individual again decreased for both species. Their reproductive output was the highest at 30°C, while at 20°C, R. luteola laid lower numbers of egg clutches and eggs per individual when kept with P. acuta than when living with conspecifics only. This study shows that temperature can strongly affect the outcome of competition between invasive and indigenous species.
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外来入侵动物和本地淡水腹足动物之间的温度依赖相互作用:外来入侵动物的竞争优势?
摘要入侵物种对生态环境造成的破坏已成为近年来国内外研究的热点,并已成为生物多样性的主要威胁。入侵物种可以完全消灭一些本地物种。另一方面,外来物种的入侵潜力受到非生物因素的强烈影响。考虑到这些因素,本研究集中研究了入侵的淡水肺蜗牛Physella acuta Draparnaud, 1805(腹足目:蜗牛科)和同地发生的Racesina luteola Lamarck, 1822(腹足目:羊足科)之间的竞争相互作用。通过比较外来物种和本地物种在相互作用下的生殖产出,评估了外来物种的竞争优势。为了探讨温度对入侵蜗牛竞争优势的驱动作用,我们考虑了4种温度。无论相互作用类型如何,在所有温度下,入侵蜗牛p.a acuta比本地蜗牛r.l uteola每个体沉积的卵多。随着温度的逐渐升高,在30℃以内,两种植物的生殖产量均有所增加。在35°C时,两个物种的每只卵囊(卵窝)和每只卵的产量再次下降。繁殖输出最高30°C,在20°C, r . luteola铺设低数量的鸡蛋离合器和鸡蛋每个保存时p acuta比生活在同种个体。该研究表明,温度对入侵物种和本地物种之间的竞争结果有很大的影响。
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Biological Letters
Biological Letters Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)
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期刊介绍: It covers a wide spectrum of biological disciplines, including animal science and zoology, general biochemistry, botany, and ecology. We also encourage submission of manuscripts related to conservation biology and wildlife management.
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