The invasive Asian benthic foraminifera Trochammina hadai Uchio, 1962: identification of a new local in Normandy (France) and a discussion on its putative introduction pathways

IF 2.2 3区 环境科学与生态学 Q2 ECOLOGY
V. Bouchet, Jean-Charles Pavard, M. Holzmann, M. McGann, E. Armynot du Châtelet, Apolyne Courleux, J. Pezy, J. Dauvin, L. Seuront
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引用次数: 2

Abstract

The invasive benthic foraminifera Trochammina hadai has been found for the first time in Europe along the coast of Normandy. Its native range of distribution is in Asia (Japan and Korea), and it has also been introduced along the coasts of western North America, Brazil and Australia. Morphological and molecular assessments confirm that specimens found in Le Havre and Caen-Ouistreham harbors belong to the Asiatic type. Like in Asia, T. hadai was found in transitional waters with muddy sediments. It exhibited high relative abundances (up to about 40%) confirming that T. hadai is a highly competitive species. In the present study, it was nearly absent from natural transitional waters and very abundant in heavily modified habitats like harbors, suggesting that ballast waters may likely be the vector of introduction. It was not recorded farther north along the coast of the Hauts-de-France. It is further hypothesized that the finding of a few specimens outside the harbor may facilitate the expansion of T. hadai in the English Channel by means of propagules dispersion.
亚洲入侵底栖有孔虫Trochammina hadai Uchio, 1962:法国诺曼底新本地物种的鉴定及其可能的引入途径的讨论
入侵的底栖有孔虫Trochammina hadai在欧洲诺曼底海岸首次被发现。它的原产于亚洲(日本和韩国),也被引进到北美西部海岸、巴西和澳大利亚。形态学和分子鉴定证实,在勒阿弗尔港和卡昂-奥伊斯特勒姆港发现的标本属于亚洲型。像在亚洲一样,T. hadai是在有泥质沉积物的过渡水域发现的。其相对丰度较高(高达40%左右),证实了hadai是一个高度竞争的物种。在目前的研究中,它在自然过渡水域几乎不存在,而在港口等经过严重改造的栖息地却非常丰富,这表明压载水可能是引入的媒介。沿着上法兰西海岸往北的地方没有记录。进一步推测,在港外发现的少数标本可能通过繁殖体扩散的方式促进了T. hadai在英吉利海峡的扩张。
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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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