{"title":"常见蜗牛 Melampus bidentatus 出现在其北部地区的整个盐沼中","authors":"Allen D. Beck, Alyse R. Wilson, Myriam A. Barbeau","doi":"10.1007/s12237-024-01414-y","DOIUrl":null,"url":null,"abstract":"<p>The common marsh snail <i>Melampus bidentatus</i> is an omnivore-detritivore that is typically restricted to the upper marsh zone in salt marshes of southern New England and further south. However, in Maritime Canadian salt marshes (specifically in the Northumberland Strait), <i>M. bidentatus</i> occurs throughout the high and low marsh zones (mean summer densities ~ 50 individuals m<sup>−2</sup>). This study determined the within-marsh distribution of <i>M. bidentatus</i> near its northern range limit and investigated the mechanisms responsible for this distribution. Intensive spatial and temporal sampling in 2015–2016 confirmed that all stages (adults, juveniles, and egg masses) occurred throughout the salt marsh. Investigations of snail survival (using tethering assays) and movement (using mark-recapture trials) indicated that mortality was very low and independent of marsh zone, and movement was moderate, random, and circuitous, generally maintaining snails in local areas. Thus, lack of differential survival and movement between marsh zones support an unrestricted distribution. This wide spatial distribution of <i>M. bidentatus</i> within salt marshes in north temperate latitudes is likely due to the species’ high physiological tolerances, absence of competition from other gastropod omnivores-detritivores, and low predation pressure in the low marsh zone. Given these findings, further research on the snails’ role in, for example, trophic dynamics would provide further insights as to latitudinal differences in the ecology of resident salt marsh fauna.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":"35 1","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The Common Snail Melampus bidentatus Occurs Throughout the Salt Marsh in Its Northern Range\",\"authors\":\"Allen D. Beck, Alyse R. Wilson, Myriam A. Barbeau\",\"doi\":\"10.1007/s12237-024-01414-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The common marsh snail <i>Melampus bidentatus</i> is an omnivore-detritivore that is typically restricted to the upper marsh zone in salt marshes of southern New England and further south. However, in Maritime Canadian salt marshes (specifically in the Northumberland Strait), <i>M. bidentatus</i> occurs throughout the high and low marsh zones (mean summer densities ~ 50 individuals m<sup>−2</sup>). This study determined the within-marsh distribution of <i>M. bidentatus</i> near its northern range limit and investigated the mechanisms responsible for this distribution. Intensive spatial and temporal sampling in 2015–2016 confirmed that all stages (adults, juveniles, and egg masses) occurred throughout the salt marsh. Investigations of snail survival (using tethering assays) and movement (using mark-recapture trials) indicated that mortality was very low and independent of marsh zone, and movement was moderate, random, and circuitous, generally maintaining snails in local areas. Thus, lack of differential survival and movement between marsh zones support an unrestricted distribution. This wide spatial distribution of <i>M. bidentatus</i> within salt marshes in north temperate latitudes is likely due to the species’ high physiological tolerances, absence of competition from other gastropod omnivores-detritivores, and low predation pressure in the low marsh zone. Given these findings, further research on the snails’ role in, for example, trophic dynamics would provide further insights as to latitudinal differences in the ecology of resident salt marsh fauna.</p>\",\"PeriodicalId\":11921,\"journal\":{\"name\":\"Estuaries and Coasts\",\"volume\":\"35 1\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2024-08-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Estuaries and Coasts\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1007/s12237-024-01414-y\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Estuaries and Coasts","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1007/s12237-024-01414-y","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
The Common Snail Melampus bidentatus Occurs Throughout the Salt Marsh in Its Northern Range
The common marsh snail Melampus bidentatus is an omnivore-detritivore that is typically restricted to the upper marsh zone in salt marshes of southern New England and further south. However, in Maritime Canadian salt marshes (specifically in the Northumberland Strait), M. bidentatus occurs throughout the high and low marsh zones (mean summer densities ~ 50 individuals m−2). This study determined the within-marsh distribution of M. bidentatus near its northern range limit and investigated the mechanisms responsible for this distribution. Intensive spatial and temporal sampling in 2015–2016 confirmed that all stages (adults, juveniles, and egg masses) occurred throughout the salt marsh. Investigations of snail survival (using tethering assays) and movement (using mark-recapture trials) indicated that mortality was very low and independent of marsh zone, and movement was moderate, random, and circuitous, generally maintaining snails in local areas. Thus, lack of differential survival and movement between marsh zones support an unrestricted distribution. This wide spatial distribution of M. bidentatus within salt marshes in north temperate latitudes is likely due to the species’ high physiological tolerances, absence of competition from other gastropod omnivores-detritivores, and low predation pressure in the low marsh zone. Given these findings, further research on the snails’ role in, for example, trophic dynamics would provide further insights as to latitudinal differences in the ecology of resident salt marsh fauna.
期刊介绍:
Estuaries and Coasts is the journal of the Coastal and Estuarine Research Federation (CERF). Begun in 1977 as Chesapeake Science, the journal has gradually expanded its scope and circulation. Today, the journal publishes scholarly manuscripts on estuarine and near coastal ecosystems at the interface between the land and the sea where there are tidal fluctuations or sea water is diluted by fresh water. The interface is broadly defined to include estuaries and nearshore coastal waters including lagoons, wetlands, tidal fresh water, shores and beaches, but not the continental shelf. The journal covers research on physical, chemical, geological or biological processes, as well as applications to management of estuaries and coasts. The journal publishes original research findings, reviews and perspectives, techniques, comments, and management applications. Estuaries and Coasts will consider properly carried out studies that present inconclusive findings or document a failed replication of previously published work. Submissions that are primarily descriptive, strongly place-based, or only report on development of models or new methods without detailing their applications fall outside the scope of the journal.