Geographic and bathymetric patterns of mitochondrial 16S rRNA sequence divergence among deep-sea amphipods, Eurythenes gryllus

France, Scott C.; Köcher, Thomas

doi:10.1007/bf00351330

Cited by 143 publications

(153 citation statements)

References 28 publications

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“…On a broader scale, populations of G. fossarum distributed across Europe are highly divergent (8-11%; Meyran et al, 1997;Mü ller, 2000) and a similar level of divergence (5-9%) was used to differentiate subspecies in G. pulex (Linnaeus) (Hadfield, 2002). Molecular variance in G. duebeni does in fact approach the minimum interspecific distances reported for other amphipod taxa (4-18%; France and Kocher, 1996), although minimum distances often appear to be higher for gammarids (9-12%; Meyran et al, 1997;Kelly et al, 2006). Thus, values of 4% divergence within G. duebeni might arguably be substantial enough to indicate divergence into two biological species.…”

Section: Phylogeography Of Gammarus Duebenimentioning

confidence: 68%

Phylogeography and environmental diversification of a highly adaptable marine amphipod, Gammarus duebeni

et al. 2007

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Genetic diversity and phylogeographic population structure in the gammarid amphipod, Gammarus duebeni, were investigated across its broad latitudinal distribution in the NE and NW Atlantic by analysis of mitochondrial DNA sequence. Gammarus duebeni has exceptional tolerance of salinity change and inhabits environments ranging from marine to freshwater. The longstanding debate on whether there are distinct marine and freshwater subspecies was assessed by sampling populations from sites characterized by different salinities. Our sequence data demonstrates that there are two major lineages, with little internal geographic structuring. Evidence is provided to suggest a pre-glacial divergence of these two clades, involving segregation between a region historically associated with the freshwater form and the majority of the marine localities on both sides of the Atlantic. A modern contact zone between the marine and freshwater forms is proposed in western Britain.

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Section: Phylogeography Of Gammarus Duebenimentioning

confidence: 68%

Phylogeography and environmental diversification of a highly adaptable marine amphipod, Gammarus duebeni

et al. 2007

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“…France and Kocher 1996;Held andWägele 2005, Zardus et al 2006). Zonation patterns in the deep−sea are likely to be due to hydrostatic pressure, which is often described as the dominant physical force pre− venting ascent or descent beyond a species' observed depth range (Belyaev 1989).…”

Section: Bathymetric Ranges Of Widespread Abyssal Peracaridsmentioning

confidence: 99%

“…Zonation patterns in the deep−sea are likely to be due to hydrostatic pressure, which is often described as the dominant physical force pre− venting ascent or descent beyond a species' observed depth range (Belyaev 1989). However, additional physical and ecological forces such as temperature, sediment granulometry, competition and predation may also influence the depth range a spe− cies can inhabit (France and Kocher 1996;Blankenship et al 2006). Temperature seems indeed to be a controlling factor in the deep sea in general (France 1994), as well as oxygen concentration (White 1987) and sediment (Brandt and Piepenburg, 1994).…”

Section: Bathymetric Ranges Of Widespread Abyssal Peracaridsmentioning

confidence: 99%

“…Midwater anoxic events can vertically isolate bathyal and abyssal faunas and trigger allopatric speciation (White 1987). In the amphipod Eurythenes gryllus, pro− nounced genetic divergences between abyssal and non−abyssal populations indicate barriers to gene flow between these bathymetric zones (France and Kocher 1996).…”

Section: Bathymetric Ranges Of Widespread Abyssal Peracaridsmentioning

confidence: 99%

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Are there widespread peracarid species in the deep sea (Crustacea: Malacostraca)?

Brandt¹,

Błażewicz-Paszkowycz²,

Bamber³

et al. 2012

Polish Polar Research

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Abstract:The global zoogeographic distribution of the most widespread peracarid species occurring in three or more ocean basins below 2000 m is analysed. Basing on the published data we investigated 45 peracarid species, which have a most widespread distribution and most likely are cosmopolitan. Thirty−three species have a wide distribution in the Northern Hemisphere. Most species occur in the North Atlantic, however, 16 of these species occur also in the North Pacific, a more limited number of species occurs in the South Atlantic or South Pacific The Southern Ocean displays some special zoogeographic features and 22 widespread species occur there below 2000 m, including highly eurybathic ones. In total, 11 of the analysed species occur in all oceans. Eucopia australis (Lophogastrida), Munneury− cope murrayi (Isopoda) and Eurythenes gryllus (Amphipoda) are the species with the wid− est distributions. Other peracarids occurring in all oceans are: the isopods Paramunnopsis oceanica and Eurycope sarsi, the mysid Caesaromysis hispida the lophogastrid Eucopia unguiculata, the amphipod Mesopleustes abyssorum and the tanaids Exspina typica, Para− narthura insignis and Pseudotanais nordenskioldi. No cumacean species has been reported with an ocean−wide distribution but Campylaspis glabra occurs in the Atlantic, Indian and Pacific oceans. Among plenty of rare species in each order there are only few species with wide distribution records. There is evidence from molecular genetic studies that some of the widespread peracarids represent several cryptic species, however, some, e.g. Eucopia aus− tralis, seem to be truly cosmopolitan species. Geography of sampling is biasing our view of biogeography. The history and quality of taxonomic work as well as the reliability of geo− graphic records (quality control of large databases) limits our investigations of widespread or cosmopolitan species as much as the limited knowledge of variation within most species causes difficulties in defining morpho−species with certainty.

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“…Many traditional taxonomic assessments of cosmopolitan species may need re-evaluation using molecular methods, and species distributions may be much narrower than inferred from morphological analyses. Molecular studies of the highly mobile amphipod Eurythenes gryllus have found cryptic and divergent populations, some in close proximity (France & Kocher 1996). Given that the mobility of the average deep-sea polychaete will be less than that of this abyssopelagic scavenging amphipod, the presence of undetected cryptic species may depress our estimates of diversity.…”

Section: Species Turnover In the Central Pacific Abyssmentioning

confidence: 99%

Polychaete species diversity in the central Pacific abyss: local and regional patterns, and relationships with productivity

Glover¹,

Smith²,

Paterson³

et al. 2002

Mar. Ecol. Prog. Ser.

144

124

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We investigated the relationship between productivity and local species diversity, and the degree of species turnover, at 8 sites on the central equatorial Pacific abyssal plain. The 8 sites span a 4-fold difference in seafloor particulate organic carbon (POC) flux and, hence, community productivity. The sites are similar in water depth (4300 to 5100 m), degree of isolation from terrigenous influences, and hydrodynamic regime. Three sites lie under the influence of equatorial upwelling, and are subject to enhanced deep POC flux derived from high overlying primary production. The remaining sites lie beneath the oligotrophic north Pacific gyre. The number of polychaete species collected at a single site ranged from 14 to 113, with at least 90% apparently being new to science. We found no evidence for the purported unimodal relationship between productivity and diversity seen in other ecosystems, including deep-sea slopes, and found only weak evidence of a monotonic increase in diversity with productivity. Rates of species turnover were low over scales of ~200 to 3000 km for the dominant polychaete species in the communities, and all sites were dominated by a core group of biogeographically widespread, locally abundant species. In contrast, there was little between-site similarity in the long list of rare species found at each site, implying either a high turnover of rare species at 200 to 3000 km scales, or incomplete sampling of the rare species list at each site. More intensive sampling studies using both morphological and molecular methods are needed to resolve the distribution patterns of rare species in the Pacific abyss. Local polychaete species diversity beneath equatorial Pacific upwelling (measured by rarefaction) appears to be unusually high for the deep sea, exceeding by at least 10 to 20% that measured in abyssal sites in the Atlantic and Pacific, and on the continental slopes of the North Atlantic, North Pacific, and Indian Oceans.

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Geographic and bathymetric patterns of mitochondrial 16S rRNA sequence divergence among deep-sea amphipods, Eurythenes gryllus

Cited by 143 publications

References 28 publications

Phylogeography and environmental diversification of a highly adaptable marine amphipod, Gammarus duebeni

Phylogeography and environmental diversification of a highly adaptable marine amphipod, Gammarus duebeni

Are there widespread peracarid species in the deep sea (Crustacea: Malacostraca)?

Polychaete species diversity in the central Pacific abyss: local and regional patterns, and relationships with productivity

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