Scavenging amphipods from the Wallaby-Zenith Fracture Zone: Extending the hadal paradigm beyond subduction trenches
Scavenging amphipods from the Wallaby-Zenith Fracture Zone: Extending the hadal paradigm beyond subduction trenches
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来自袋鼠-天顶断裂带的食腐片脚类动物:将超深渊范式扩展到俯冲海沟之外
DOI:
10.1007/s00227-020-03798-4
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发表时间:
2020
期刊:
影响因子:
2.4
通讯作者:
Weston J
中科院分区:
文献类型:
--
作者:
Weston J
Our understanding of the ecology of the hadal zone (> 6000 m depth) is based solely on subduction trenches, leaving other geomorphological features, such as fracture zones, troughs, and basins, understudied. To address this knowledge gap, the Wallaby-Zenith Fracture Zone, Indian Ocean (WZFZ; ~ 22°S, 102°E; maximum depth 6625 m measured during Expedition SO258) was studied using free-fall baited landers. We assessed the amphipod distribution and community assemblage of this non-subduction hadal feature and compared it to subduction hadal features. Eleven species were identified across the abyssal-hadal transition zone using a paired morphological and DNA barcoding approach. The community composition was found to change gradually from abyssal to hadal depths, which contrasts with the ecotone shift characteristic of subduction trenches. A large population ofBathycallisoma schellenbergi(Birstein & Vinogradov, 1958), a quintessential hadal amphipod, was present at the flat bottom of the WZFZ. Further, an mtDNA phylogeny resolved a degree of phylogeographic structure between theB. schellenbergiWZFZ population and four previously sampled Pacific Ocean subduction trench populations, indicating these features are not interconnected through ongoing gene flow. Combined, these data indicate that some amphipods have far broader distributions than previously understood, with some species present in both hadal subduction trenches and non-subduction fracture zones and basins interspersed across the abyssal plains. This initial exploration highlights that whilst non-subduction features are an overlooked minor fraction of the total hadal area, they are essential to our understanding of the ecological and evolutionary dynamics across the hadal zone.
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DOI:
10.1017/s0025315415002064
发表时间:
2016-12-01
影响因子:
1.2
作者:
Duffy, Grant A.;Gutteridge, Zoe R. S.;Horton, Tammy
通讯作者:
Horton, Tammy
DOI:
10.1080/14888386.2016.1172257
发表时间:
2016-01-01
期刊:
Biodiversity (Ottawa)
影响因子:
--
作者:
Havermans, Charlotte
通讯作者:
Havermans, Charlotte
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
I. M. Sborshchikov;I. Murdmaa;V. Matveenkov;G. L. Kashintsev;A. I. Golmshtock;A. Al’mukhamedov
通讯作者:
A. Al’mukhamedov
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
N. Kilgallen
通讯作者:
N. Kilgallen
影响因子:
0.9
作者:
C. D. D’ACOZ;C. Havermans
通讯作者:
C. Havermans