Bait-attending fauna of the Kermadec Trench, SW Pacific Ocean: Evidence for an ecotone across the abyssal-hadal transition zone

被引:95
作者
Jamieson, A. J. [1 ]
Kilgallen, N. M. [2 ]
Rowden, A. A. [2 ]
Fujii, T. [1 ]
Horton, T. [3 ]
Loerz, A. -N. [2 ]
Kitazawa, K. [4 ]
Priede, I. G. [1 ]
机构
[1] Univ Aberdeen, Inst Biol & Environm Sci, Oceanlab, Newburgh AB41 6AA, Aberdeen, Scotland
[2] Natl Inst Water & Atmospher Res NIWA, Wellington 6021, New Zealand
[3] Univ Southampton, Natl Oceanog Ctr, Southampton SO14 3ZH, Hants, England
[4] Univ Tokyo, Atmosphere & Ocean Res Inst, Kashiwa, Chiba 2778564, Japan
关键词
Bait-attending fauna; Abyssal zone; Hadal zone; Kermadec Trench; Amphipoda; Liparidae; Ecotone; AMPHIPOD EURYTHENES-GRYLLUS; DEEP-SEA; SCAVENGING AMPHIPODS; CHALLENGER DEEP; ATACAMA TRENCH; POPULATION-STRUCTURE; CRUSTACEA; BATHYAL; BIOLOGY; ASSEMBLAGES;
D O I
10.1016/j.dsr.2010.11.003
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
The bait-attending fauna of the abyssal-hadal transition zone of the Kermadec Trench, SW Pacific Ocean (4329-7966 m), was investigated using a baited camera and a trap lander. The abyssal stations (43296007 m) revealed a typical scavenging fish community comprising macrourids and synaphobranchid eels, as well as natantian decapods. At the hadal depths of 7199 and 7561 m, the endemic liparid Notoliparis kermadecensis was observed aggregating at the bait reaching surprisingly high numbers of 5 and 13, respectively. A total of 3183 invertebrate samples were collected (mean deployment time =16 h) of which 97.8% were of the order Amphipoda (nine families, 16 species). Ten of the amphipod species represent new distributional records for the Kermadec Trench and the New Zealand Exclusive Economic Zone; this includes the shallowest known record of the endemic hadal amphipod Hirondellea dubia (6000, 6007 m). Using amphipods to statistically examine the compositional change across the abyssal-hadal boundary, an ecotone between depths <6007 and > 6890 m was found, indicating that there is an ecologically distinct bait-attending fauna in this trench. (C) 2010 Elsevier Ltd. All rights reserved.
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页码:49 / 62
页数:14
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