The composition and relationships of the marine molluscan fauna of the Pitcairn Islands
Identifieur interne : 000B29 ( Istex/Curation ); précédent : 000B28; suivant : 000B30The composition and relationships of the marine molluscan fauna of the Pitcairn Islands
Auteurs : R. C. PreeceSource :
- Biological Journal of the Linnean Society [ 0024-4066 ] ; 1995-09.
Descripteurs français
English descriptors
- KwdEn :
- Atoll, Atoll research bulletin, Bartsch rehder, Biogeography, Biological journal, Bishop museum, Bivalve, Bivalve ratios, Bivalve species, Brief description, Broderip, Broderip sowerby, Caecum, Cantharidus marmoreus, Cerithium, Conus, Cook islands, Cypraea, Deeper water, Devaney randall, Dioscoroides press, Dispersal, Drupa, Drupa speciosa, Ducie, East beaches, Easter island, Edmunds preece, Endemic, Endemic species, Endemism, Enewetak atoll, Environmental changes, Epifaunal species, Evolutionary biology, Fauna, Faunal, Faunal turnover, Fossil lagoon, French polynesia, Gastropod, Genus, Gmelin, Gould, Habitat availability, Hawaiian islands, Henderson, Henderson island, High rates, Insular marine faunas, Intertidal zone, Island faunas, Jolly brooke, Lamarck, Larval development, Linnean, Linnean society, Marginal conditions, Marine mollusca, Marine molluscan fauna, Marine molluscan faunas, Marine molluscs, Marine mollusks, Mitra, Mollusc, Mollusca, Molluscan, Molluscan faunas, Morula, Morula oparense, Morum ponderosum, Natural history, Neighbouring islands, Oeno, Other groups, Pacific plate, Pacific province, Paulay, Pea, Personal communication, Pitcairn, Pitcairn group, Pitcairn island, Pitcairn islands, Pitcairn marine molluscan fauna, Polynesia, Preece, Quoy gaimard, Randall, Rare components, Recent expedition, Reeve, Rehder, Rehder randall, Rehder wilson, Relative abundance, Rissoina, Roding, Sachet stoddart, Sediment samples, Several species, Sleurs, Sleurs preece, Small taxa, Societatis thiele, Southeastern polynesia, Sowerby, Species composition, Taxon, Undescribed, Undescribed taxa, Uplifted atoll.
- Teeft :
- Atoll, Atoll research bulletin, Bartsch rehder, Biogeography, Biological journal, Bishop museum, Bivalve, Bivalve ratios, Bivalve species, Brief description, Broderip, Broderip sowerby, Caecum, Cantharidus marmoreus, Cerithium, Conus, Cook islands, Cypraea, Deeper water, Devaney randall, Dioscoroides press, Dispersal, Drupa, Drupa speciosa, Ducie, East beaches, Easter island, Edmunds preece, Endemic, Endemic species, Endemism, Enewetak atoll, Environmental changes, Epifaunal species, Evolutionary biology, Fauna, Faunal, Faunal turnover, Fossil lagoon, French polynesia, Gastropod, Genus, Gmelin, Gould, Habitat availability, Hawaiian islands, Henderson, Henderson island, High rates, Insular marine faunas, Intertidal zone, Island faunas, Jolly brooke, Lamarck, Larval development, Linnean, Linnean society, Marginal conditions, Marine mollusca, Marine molluscan fauna, Marine molluscan faunas, Marine molluscs, Marine mollusks, Mitra, Mollusc, Mollusca, Molluscan, Molluscan faunas, Morula, Morula oparense, Morum ponderosum, Natural history, Neighbouring islands, Oeno, Other groups, Pacific plate, Pacific province, Paulay, Pea, Personal communication, Pitcairn, Pitcairn group, Pitcairn island, Pitcairn islands, Pitcairn marine molluscan fauna, Polynesia, Preece, Quoy gaimard, Randall, Rare components, Recent expedition, Reeve, Rehder, Rehder randall, Rehder wilson, Relative abundance, Rissoina, Roding, Sachet stoddart, Sediment samples, Several species, Sleurs, Sleurs preece, Small taxa, Societatis thiele, Southeastern polynesia, Sowerby, Species composition, Taxon, Undescribed, Undescribed taxa, Uplifted atoll.
Abstract
The recent expedition has doubled the number of marine molluscs known from the Pitcairn Islands. Over 80 taxa are recorded from Ducie and Pitcairn (both still poorly known), 240 from Oeno and 320 from Henderson. A total exceeding 400 taxa is now known from the group as a whole. Most of this increase results from a vastly improved knowledge of the small taxa that had been neglected in earlier surveys. Important faunal differences exist between the four islands in the group which are related to the different character of each island. These totals still underestimate the true diversities, but they provide data that are comparable in quality to those from adjacent regions. In this context the molluscan fauna from the Pitcairn Islands is seen to be impoverished when compared to those from islands further west. Most of the fauna is composed of widespread Indo‐West Pacific species, but there are several taxa that have more restricted ranges centred on S.E. Polynesia. A few, including some undescribed taxa discovered on the expedition, appear to be endemic. Significantly, many of these are characterized by non‐planktotrophic larval development. Comparison of the modern fauna from Henderson with the fossil fauna from the Pleistocene reef on its plateau reveals important differences. About 25% of the fossil molluscs are currently unknown from the group and about 5% appear to be undescribed. These high rates of turnover demonstrate that the faunas are temporally unstable.
Url:
DOI: 10.1111/j.1095-8312.1995.tb01095.x
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R. C. Preece<affiliation><mods:affiliation>Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ</mods:affiliation>
<wicri:noCountry code="subField">3EJ</wicri:noCountry>
</affiliation>
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<term>Atoll research bulletin</term>
<term>Bartsch rehder</term>
<term>Biogeography</term>
<term>Biological journal</term>
<term>Bishop museum</term>
<term>Bivalve</term>
<term>Bivalve ratios</term>
<term>Bivalve species</term>
<term>Brief description</term>
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<term>Broderip sowerby</term>
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<term>Cantharidus marmoreus</term>
<term>Cerithium</term>
<term>Conus</term>
<term>Cook islands</term>
<term>Cypraea</term>
<term>Deeper water</term>
<term>Devaney randall</term>
<term>Dioscoroides press</term>
<term>Dispersal</term>
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<term>Drupa speciosa</term>
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<term>Faunal turnover</term>
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<term>French polynesia</term>
<term>Gastropod</term>
<term>Genus</term>
<term>Gmelin</term>
<term>Gould</term>
<term>Habitat availability</term>
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<term>Insular marine faunas</term>
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<term>Other groups</term>
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<term>Preece</term>
<term>Quoy gaimard</term>
<term>Randall</term>
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<term>Recent expedition</term>
<term>Reeve</term>
<term>Rehder</term>
<term>Rehder randall</term>
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<term>Relative abundance</term>
<term>Rissoina</term>
<term>Roding</term>
<term>Sachet stoddart</term>
<term>Sediment samples</term>
<term>Several species</term>
<term>Sleurs</term>
<term>Sleurs preece</term>
<term>Small taxa</term>
<term>Societatis thiele</term>
<term>Southeastern polynesia</term>
<term>Sowerby</term>
<term>Species composition</term>
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<front><div type="abstract" xml:lang="en">The recent expedition has doubled the number of marine molluscs known from the Pitcairn Islands. Over 80 taxa are recorded from Ducie and Pitcairn (both still poorly known), 240 from Oeno and 320 from Henderson. A total exceeding 400 taxa is now known from the group as a whole. Most of this increase results from a vastly improved knowledge of the small taxa that had been neglected in earlier surveys. Important faunal differences exist between the four islands in the group which are related to the different character of each island. These totals still underestimate the true diversities, but they provide data that are comparable in quality to those from adjacent regions. In this context the molluscan fauna from the Pitcairn Islands is seen to be impoverished when compared to those from islands further west. Most of the fauna is composed of widespread Indo‐West Pacific species, but there are several taxa that have more restricted ranges centred on S.E. Polynesia. A few, including some undescribed taxa discovered on the expedition, appear to be endemic. Significantly, many of these are characterized by non‐planktotrophic larval development. Comparison of the modern fauna from Henderson with the fossil fauna from the Pleistocene reef on its plateau reveals important differences. About 25% of the fossil molluscs are currently unknown from the group and about 5% appear to be undescribed. These high rates of turnover demonstrate that the faunas are temporally unstable.</div>
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