Macrobenthic Mollusca of the Prince Gustav Channel, Eastern Antarctic Peninsula: An Area Undergoing Colonisation
Macrobenthic Mollusca of the Prince Gustav Channel, Eastern Antarctic Peninsula: An Area Undergoing Colonisation
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DOI：
10.3389/fmars.2021.771369
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发表时间：
2021-12-08
影响因子：
3.7
通讯作者：
Linse, Katrin
中科院分区：
文献类型：
--
作者：
Anderson, Madeline P. B. C.;Fenberg, Phillip B.;Linse, Katrin
2018年，RRS詹姆斯·克拉克·罗斯调查了古斯塔夫王子海峡地区的海洋底栖生物多样性，该地区将南极半岛东海岸与詹姆斯·罗斯岛分开。这条海峡的南端在1995年崩塌之前一直被古斯塔夫亲王冰架覆盖。底栖动物样本由一个底栖雪橇在海峡和邻近的杜斯湾的6个站点（200- 1200米深度）采集。共采集活体软体动物20307只，隶属于螺螺纲、双壳纲、腹足纲和蹼足纲4纲50种。该地区的物种丰富度低（每站7 ~ 39种），但丰度高（以蹼足类为代表，有11331个标本）。群落功能特征以流动性发展和流动性类型为主。古斯塔夫王子海峡站内软体动物物种丰度的组合分析是不同的，没有深度或位置的模式。然而，当参考更广泛的威德尔环流区域（300至2000米深度的15个站点）分析双壳类组合时，古斯塔夫王子海峡与其他威德尔环流站点不同，在更深或地理上更远的区域之间具有更高的差异。古斯塔夫王子海峡正在经历最近冰架崩塌后的殖民。由于许多南极冰架受到气候变暖的威胁，在未来的监测下，这一地区可能成为底栖动物区系演替的一个研究案例。
In 2018 RRS James Clark Ross investigated the marine benthic biodiversity of the Prince Gustav Channel area which separates the eastern coast of the Antarctic Peninsula from James Ross Island. The southern end of this channel had been covered by the Prince Gustav Ice Shelf until its collapse in 1995. Benthic samples were collected by an epibenthic sledge at six stations (200-1,200 m depth) in the channel and adjacent Duse Bay. In total 20,307 live collected mollusc specimens belonging to 50 species and 4 classes (Solenogastres, Bivalvia, Gastropoda, and Scaphopoda) were identified. The area may be characterised by it's low species richness (ranging from 7 to 39 species per station) but high abundances (specifically of the Scaphopods with 11,331 specimens). The functional traits of the community were dominated by motile development and mobility type. Assemblage analyses of the molluscan species abundances within the Prince Gustav Channel stations sit distinct, with no pattern by depth or location. However, when bivalve assemblages were analysed with reference to the wider Weddell Gyre region (15 stations from 300 to 2,000 m depth), the Prince Gustav Channel sits distinct from the other Weddell Gyre stations with a higher dissimilarity between the deeper or more geographically distant areas. The Prince Gustav Channel is undergoing colonisation following the recent ice shelf collapse. With many Antarctic ice shelves threatened under climate warming, this area, with future monitoring, may serve as a case study of benthic faunal succession.