Model for Quantitatively Estimating Marine Biogeographic Provinciality——A Case Study of the Permian Marine Biogeography Provincialism |
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作者姓名: | Shi Guangrong School of Aquatic Science and Natural Resources Management Deakin University Rusden Campus Blackburn Ro Victori Australia |
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作者单位: | Shi Guangrong School of Aquatic Science and Natural Resources Management,Deakin University,Rusden Campus,662 Blackburn Road,Victoria,Australia |
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基金项目: | This Paper was supported by the Australian Research Council. |
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摘 要: | The relationship between the number, position and orientation of lithosphericplates and marine biogeographic provinciality may be quantified since the spatial distribution oforganisms is primarily controlled by latitude-related temperature gradients and geographicalbarriers-two dynamic biogeographic determinants whose variation is closely related to thespatial disposition of continents and oceans. This paper modifies Schopf s (1976) model forquantitatively estimating shallow marine provinciality in recognition of latitude-related tem-perature gradients as the primary biogeographical factor. A test of the modified model againstmodern marine zoogeography reveals high consistency between them. Using this modified mod-el and the Permian palaeogeographical reconstruction maps of Scotese and McKerrow (1990),fifteen shallow benthic marine provinces are estimated to be Early and Late Permian in agerespectively. A comparison of the estimated Permian marine provinciality with previouslyrecognised empirical provincial patterns reveals a high degree of congruity, which may implythat there existed moderate to high latitudinal thermal gradients during the Permian, a levelprobably similar to that of the present world.
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Model for Quantitatively Estimating Marine Biogeographic Provinciality—A Case Study of the Permian Marine Biogeography Provincialism |
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Authors: | Shi Guangrong School of Aquatic Science and Natural Resources Management Deakin University Rusden Campus Blackburn Roa Victori Australia |
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Abstract: | The relationship between the number, position and orientation of lithosphericplates and marine biogeographic provinciality may be quantified since the spatial distribution oforganisms is primarily controlled by latitude-related temperature gradients and geographicalbarriers-two dynamic biogeographic determinants whose variation is closely related to thespatial disposition of continents and oceans. This paper modifies Schopf s (1976) model forquantitatively estimating shallow marine provinciality in recognition of latitude-related tem-perature gradients as the primary biogeographical factor. A test of the modified model againstmodern marine zoogeography reveals high consistency between them. Using this modified mod-el and the Permian palaeogeographical reconstruction maps of Scotese and McKerrow (1990),fifteen shallow benthic marine provinces are estimated to be Early and Late Permian in agerespectively. A comparison of the estimated Permian marine provinciality with previouslyrecognised empirical provincial patterns reveals a high degree of congruity, which may implythat there existed moderate to high latitudinal thermal gradients during the Permian, a levelprobably similar to that of the present world. |
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Keywords: | plate tectonics biogeographic provinciality model Permian |
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