Field surveys reveal physicochemical conditions promoting occurrence and high abundance of an invasive freshwater snail (Potamopyrgus antipodarum)

IF 2.2 3区 环境科学与生态学 Q2 ECOLOGY Aquatic Invasions Pub Date : 2023-04-18 DOI:10.3391/ai.2023.18.1.103389
Michele D. Larson, Daniel J. Greenwood, Kara Flanigan, A. Krist
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引用次数: 1

Abstract

Environmental conditions promoting the occurrence and high abundance of non-native taxa are linked to critical stages of species invasions: establishment, whether a site can sustain a population of the non-native taxon, and impact, the extent to which the consequences of establishment negatively affect the invaded ecosystem. Using surveys across environmental gradients, we examined the physicochemical conditions associated with the occurrence and abundance of the invasive New Zealand mudsnail (Potamopyrgus antipodarum) and co-occurring native mollusks. Abundance of Potamopyrgus very strongly increased with stream width and conductivity (specifically with chloride, sulfate, potassium, and sodium ions). Also, Potamopyrgus were most likely to occur at sites with relatively low pH and water velocity and relatively high calcium ion concentration and abundance also slightly increased in these conditions. The physicochemical conditions indicate the characteristics of sites that are suitable for establishment and secondary spread of Potamopyrgus. Native mollusks differed from Potamopyrgus in the physicochemical conditions associated with abundance suggesting that variation among habitats could permit native mollusks to persist at larger geographic scales even if they often co-occur with Potamopyrgus. Abundance of native Physa moderately decreased with abundance of Potamopyrgus. Because abundance of Physa and Potamopyrgus responded oppositely to stream width and conductivity, the negative relationship between the abundance of these two taxa may be caused by contrasting responses to physicochemical conditions, acting alone or in concert with biotic interactions.
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野外调查揭示了促进入侵淡水蜗牛(Potamopyrgus antipodarum)发生和高丰度的物化条件。
促进非本地分类群发生和高丰度的环境条件与物种入侵的关键阶段有关:建立,一个地点是否能够维持非本地分类群的种群,以及影响,建立的后果对入侵生态系统的负面影响程度。通过跨环境梯度的调查,我们研究了与入侵新西兰泥螺(Potamopyrgus antipodarum)和共生本地软体动物的发生和丰度相关的物理化学条件。Potamopyrgus的丰度随着水流宽度和电导率(特别是氯、硫酸盐、钾和钠离子)的增加而增加。在较低的pH值和流速、较高的钙离子浓度和丰度也略有增加的条件下,赤潮最容易发生。物化条件表明了适宜水蚤孳生和次生传播的场所特征。原生软体动物在与丰富度相关的物理化学条件上与马铃薯虫不同,这表明栖息地的变化可能使原生软体动物在更大的地理尺度上持续存在,即使它们经常与马铃薯虫共存。原生Physa的丰度随着Potamopyrgus的丰度适度下降。由于Physa和Potamopyrgus的丰度与河流宽度和电导率的响应相反,这两个分类群的丰度之间的负相关关系可能是由于对物理化学条件的不同响应,单独作用或与生物相互作用一致造成的。
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来源期刊
Aquatic Invasions
Aquatic Invasions ECOLOGY-MARINE & FRESHWATER BIOLOGY
CiteScore
4.30
自引率
0.00%
发文量
20
审稿时长
6-12 weeks
期刊介绍: Aquatic Invasions is an open access, peer-reviewed international journal focusing on academic research of biological invasions in both inland and coastal water ecosystems from around the world. It was established in 2006 as initiative of the International Society of Limnology (SIL) Working Group on Aquatic Invasive Species (WGAIS) with start-up funding from the European Commission Sixth Framework Programme for Research and Technological Development Integrated Project ALARM. Aquatic Invasions is an official journal of International Association for Open Knowledge on Invasive Alien Species (INVASIVESNET). Aquatic Invasions provides a forum for professionals involved in research of aquatic non-native species, including a focus on the following: • Patterns of non-native species dispersal, including range extensions with global change • Trends in new introductions and establishment of non-native species • Population dynamics of non-native species • Ecological and evolutionary impacts of non-native species • Behaviour of invasive and associated native species in invaded areas • Prediction of new invasions • Advances in non-native species identification and taxonomy
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