The Experts below are selected from a list of 180 Experts worldwide ranked by ideXlab platform
Alan J Jamieson - One of the best experts on this subject based on the ideXlab platform.
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population structure of the hadal amphipod bathycallisoma scopelocheirus schellenbergi in the kermadec trench and new Hebrides trench sw pacific
Deep-sea Research Part Ii-topical Studies in Oceanography, 2017Co-Authors: Nichola C. Lacey, Daniel J. Mayor, Thomas D. Linley, Alan J JamiesonAbstract:Abstract Deep-sea animals inhabiting the hadal zone (>6000 m deep) are frequently reported to occupy large bathymetric ranges, but details of intra-specific population structure and the underlying drivers remain poorly understood. Here we describe the population structure of the dominant SW Pacific hadal amphipod, Bathycallisoma schellenbergi, across its bathymetric range in the Kermadec (10,047 m) and New Hebrides (7156 m) trenches and explore the factors likely responsible for the observed patterns. These two trenches are relatively close geographically but underlie different water masses and are topographically isolated by the Kermadec fore-arc. The minimum depth of B. schellenbergi was ~1000 m shallower in the New Hebrides Trench than in the Kermadec Trench although similar patterns of ontogenetic stratification were present; juveniles were restricted to depths Hirondellea dubia, at mid-trench depths corresponded to maximum densities of B. schellenbergi , a trend that was reversed towards the trench axes regardless of actual depth. This suggests that the population structure and amphipod assemblages are more affected by how trench topography influences the distribution of food and potential ecological interactions, rather than simply by the effects of hydrostatic pressure.
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bait attending fishes of the abyssal zone and hadal boundary community structure functional groups and species distribution in the kermadec new Hebrides and mariana trenches
Deep Sea Research Part I: Oceanographic Research Papers, 2017Co-Authors: Thomas D. Linley, Andrew L Stewart, Peter Mcmillan, Malcolm R Clark, Mackenzie E Gerringer, Jeffrey C Drazen, Toyonobu Fujii, Alan J JamiesonAbstract:Abstract Baited landers were deployed at 83 stations at four locations in the west Pacific Ocean from bathyal to hadal depths: The Kermadec Trench, the New Hebrides Trench, the adjoining South Fiji Basin and the Mariana Trench. Forty-seven putative fish species were observed. Distinct fish faunal groups were identified based on maximum numbers and percentage of observations. Both analyses broadly agreed on the community structure: A bathyal group at The absence of the abyssal group from the New Hebrides Trench and South Fiji Basin was due to the absence of macrourids ( Coryphaenoides spp.), which defined the group. The macrourids may be energetically limited in these areas. In their absence the species of the AHTZ group appear released of competition with the macrourids and are found far shallower at these sites. The fish groups had distinct feeding strategies while attending the bait: The bathyal and abyssal groups were almost exclusively necrophagous, the AHTZ group comprised predatory and generalist feeders, while the hadal snailfishes were exclusively predators. With increasing depth, predation was found to increase while scavenging decreased. The data suggest scavenging fish fauna do not extend deeper than the hadal boundary.
Nichola C. Lacey - One of the best experts on this subject based on the ideXlab platform.
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Population structure of the hadal amphipod Bathycallisoma (Scopelocheirus) schellenbergi in the Kermadec Trench and New Hebrides Trench, SW Pacific
Deep-Sea Research Part II: Topical Studies in Oceanography, 2018Co-Authors: Nichola C. Lacey, Daniel J. Mayor, Thomas D. Linley, Andrew James JamiesonAbstract:Deep-sea animals inhabiting the hadal zone (>6000 m deep) are frequently reported to occupy large bathymetric ranges, but details of intra-specific population structure and the underlying drivers remain poorly understood. Here we describe the population structure of the dominant SW Pacific hadal amphipod, Bathycallisoma schellenbergi, across its bathymetric range in the Kermadec (10,047 m) and New Hebrides (7156 m) trenches and explore the factors likely responsible for the observed patterns. These two trenches are relatively close geographically but underlie different water masses and are topographically isolated by the Kermadec fore-arc. The minimum depth of B. schellenbergi was ~1000 m shallower in the New Hebrides Trench than in the Kermadec Trench although similar patterns of ontogenetic stratification were present; juveniles were restricted to depths
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population structure of the hadal amphipod bathycallisoma scopelocheirus schellenbergi in the kermadec trench and new Hebrides trench sw pacific
Deep-sea Research Part Ii-topical Studies in Oceanography, 2017Co-Authors: Nichola C. Lacey, Daniel J. Mayor, Thomas D. Linley, Alan J JamiesonAbstract:Abstract Deep-sea animals inhabiting the hadal zone (>6000 m deep) are frequently reported to occupy large bathymetric ranges, but details of intra-specific population structure and the underlying drivers remain poorly understood. Here we describe the population structure of the dominant SW Pacific hadal amphipod, Bathycallisoma schellenbergi, across its bathymetric range in the Kermadec (10,047 m) and New Hebrides (7156 m) trenches and explore the factors likely responsible for the observed patterns. These two trenches are relatively close geographically but underlie different water masses and are topographically isolated by the Kermadec fore-arc. The minimum depth of B. schellenbergi was ~1000 m shallower in the New Hebrides Trench than in the Kermadec Trench although similar patterns of ontogenetic stratification were present; juveniles were restricted to depths Hirondellea dubia, at mid-trench depths corresponded to maximum densities of B. schellenbergi , a trend that was reversed towards the trench axes regardless of actual depth. This suggests that the population structure and amphipod assemblages are more affected by how trench topography influences the distribution of food and potential ecological interactions, rather than simply by the effects of hydrostatic pressure.
Thomas D. Linley - One of the best experts on this subject based on the ideXlab platform.
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Population structure of the hadal amphipod Bathycallisoma (Scopelocheirus) schellenbergi in the Kermadec Trench and New Hebrides Trench, SW Pacific
Deep-Sea Research Part II: Topical Studies in Oceanography, 2018Co-Authors: Nichola C. Lacey, Daniel J. Mayor, Thomas D. Linley, Andrew James JamiesonAbstract:Deep-sea animals inhabiting the hadal zone (>6000 m deep) are frequently reported to occupy large bathymetric ranges, but details of intra-specific population structure and the underlying drivers remain poorly understood. Here we describe the population structure of the dominant SW Pacific hadal amphipod, Bathycallisoma schellenbergi, across its bathymetric range in the Kermadec (10,047 m) and New Hebrides (7156 m) trenches and explore the factors likely responsible for the observed patterns. These two trenches are relatively close geographically but underlie different water masses and are topographically isolated by the Kermadec fore-arc. The minimum depth of B. schellenbergi was ~1000 m shallower in the New Hebrides Trench than in the Kermadec Trench although similar patterns of ontogenetic stratification were present; juveniles were restricted to depths
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population structure of the hadal amphipod bathycallisoma scopelocheirus schellenbergi in the kermadec trench and new Hebrides trench sw pacific
Deep-sea Research Part Ii-topical Studies in Oceanography, 2017Co-Authors: Nichola C. Lacey, Daniel J. Mayor, Thomas D. Linley, Alan J JamiesonAbstract:Abstract Deep-sea animals inhabiting the hadal zone (>6000 m deep) are frequently reported to occupy large bathymetric ranges, but details of intra-specific population structure and the underlying drivers remain poorly understood. Here we describe the population structure of the dominant SW Pacific hadal amphipod, Bathycallisoma schellenbergi, across its bathymetric range in the Kermadec (10,047 m) and New Hebrides (7156 m) trenches and explore the factors likely responsible for the observed patterns. These two trenches are relatively close geographically but underlie different water masses and are topographically isolated by the Kermadec fore-arc. The minimum depth of B. schellenbergi was ~1000 m shallower in the New Hebrides Trench than in the Kermadec Trench although similar patterns of ontogenetic stratification were present; juveniles were restricted to depths Hirondellea dubia, at mid-trench depths corresponded to maximum densities of B. schellenbergi , a trend that was reversed towards the trench axes regardless of actual depth. This suggests that the population structure and amphipod assemblages are more affected by how trench topography influences the distribution of food and potential ecological interactions, rather than simply by the effects of hydrostatic pressure.
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bait attending fishes of the abyssal zone and hadal boundary community structure functional groups and species distribution in the kermadec new Hebrides and mariana trenches
Deep Sea Research Part I: Oceanographic Research Papers, 2017Co-Authors: Thomas D. Linley, Andrew L Stewart, Peter Mcmillan, Malcolm R Clark, Mackenzie E Gerringer, Jeffrey C Drazen, Toyonobu Fujii, Alan J JamiesonAbstract:Abstract Baited landers were deployed at 83 stations at four locations in the west Pacific Ocean from bathyal to hadal depths: The Kermadec Trench, the New Hebrides Trench, the adjoining South Fiji Basin and the Mariana Trench. Forty-seven putative fish species were observed. Distinct fish faunal groups were identified based on maximum numbers and percentage of observations. Both analyses broadly agreed on the community structure: A bathyal group at The absence of the abyssal group from the New Hebrides Trench and South Fiji Basin was due to the absence of macrourids ( Coryphaenoides spp.), which defined the group. The macrourids may be energetically limited in these areas. In their absence the species of the AHTZ group appear released of competition with the macrourids and are found far shallower at these sites. The fish groups had distinct feeding strategies while attending the bait: The bathyal and abyssal groups were almost exclusively necrophagous, the AHTZ group comprised predatory and generalist feeders, while the hadal snailfishes were exclusively predators. With increasing depth, predation was found to increase while scavenging decreased. The data suggest scavenging fish fauna do not extend deeper than the hadal boundary.
Andrew James Jamieson - One of the best experts on this subject based on the ideXlab platform.
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Population structure of the hadal amphipod Bathycallisoma (Scopelocheirus) schellenbergi in the Kermadec Trench and New Hebrides Trench, SW Pacific
Deep-Sea Research Part II: Topical Studies in Oceanography, 2018Co-Authors: Nichola C. Lacey, Daniel J. Mayor, Thomas D. Linley, Andrew James JamiesonAbstract:Deep-sea animals inhabiting the hadal zone (>6000 m deep) are frequently reported to occupy large bathymetric ranges, but details of intra-specific population structure and the underlying drivers remain poorly understood. Here we describe the population structure of the dominant SW Pacific hadal amphipod, Bathycallisoma schellenbergi, across its bathymetric range in the Kermadec (10,047 m) and New Hebrides (7156 m) trenches and explore the factors likely responsible for the observed patterns. These two trenches are relatively close geographically but underlie different water masses and are topographically isolated by the Kermadec fore-arc. The minimum depth of B. schellenbergi was ~1000 m shallower in the New Hebrides Trench than in the Kermadec Trench although similar patterns of ontogenetic stratification were present; juveniles were restricted to depths
Daniel J. Mayor - One of the best experts on this subject based on the ideXlab platform.
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Population structure of the hadal amphipod Bathycallisoma (Scopelocheirus) schellenbergi in the Kermadec Trench and New Hebrides Trench, SW Pacific
Deep-Sea Research Part II: Topical Studies in Oceanography, 2018Co-Authors: Nichola C. Lacey, Daniel J. Mayor, Thomas D. Linley, Andrew James JamiesonAbstract:Deep-sea animals inhabiting the hadal zone (>6000 m deep) are frequently reported to occupy large bathymetric ranges, but details of intra-specific population structure and the underlying drivers remain poorly understood. Here we describe the population structure of the dominant SW Pacific hadal amphipod, Bathycallisoma schellenbergi, across its bathymetric range in the Kermadec (10,047 m) and New Hebrides (7156 m) trenches and explore the factors likely responsible for the observed patterns. These two trenches are relatively close geographically but underlie different water masses and are topographically isolated by the Kermadec fore-arc. The minimum depth of B. schellenbergi was ~1000 m shallower in the New Hebrides Trench than in the Kermadec Trench although similar patterns of ontogenetic stratification were present; juveniles were restricted to depths
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population structure of the hadal amphipod bathycallisoma scopelocheirus schellenbergi in the kermadec trench and new Hebrides trench sw pacific
Deep-sea Research Part Ii-topical Studies in Oceanography, 2017Co-Authors: Nichola C. Lacey, Daniel J. Mayor, Thomas D. Linley, Alan J JamiesonAbstract:Abstract Deep-sea animals inhabiting the hadal zone (>6000 m deep) are frequently reported to occupy large bathymetric ranges, but details of intra-specific population structure and the underlying drivers remain poorly understood. Here we describe the population structure of the dominant SW Pacific hadal amphipod, Bathycallisoma schellenbergi, across its bathymetric range in the Kermadec (10,047 m) and New Hebrides (7156 m) trenches and explore the factors likely responsible for the observed patterns. These two trenches are relatively close geographically but underlie different water masses and are topographically isolated by the Kermadec fore-arc. The minimum depth of B. schellenbergi was ~1000 m shallower in the New Hebrides Trench than in the Kermadec Trench although similar patterns of ontogenetic stratification were present; juveniles were restricted to depths Hirondellea dubia, at mid-trench depths corresponded to maximum densities of B. schellenbergi , a trend that was reversed towards the trench axes regardless of actual depth. This suggests that the population structure and amphipod assemblages are more affected by how trench topography influences the distribution of food and potential ecological interactions, rather than simply by the effects of hydrostatic pressure.