Difference between revisions of "RECENT PUBLICATIONS ON FORAMINIFERA 2012 (1)"

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---- Alegret, L., Thomas, E., Lohmann, K.C., in press. [http://www.pnas.org/content/early/2011/12/28/1110601109.abstract End-Cretaceous marine mass extinction not caused by productivity collapse]. PNAS, doi: 10.1073/pnas.1110601109  
 
---- Alegret, L., Thomas, E., Lohmann, K.C., in press. [http://www.pnas.org/content/early/2011/12/28/1110601109.abstract End-Cretaceous marine mass extinction not caused by productivity collapse]. PNAS, doi: 10.1073/pnas.1110601109  
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== BIOGEOGRAPHY AND ECOSTRATIGRAPHY OF QUATERNARY PLANKTIC FORAMINIFERAL TAPHOCOENOSES ==
 
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[[Image:Marine_Micropaleontology_Front.gif|left|80px| ]]<font size="2">
 
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The Leeward Islands lie within an oceanographically complex area influenced by North Atlantic Gyre flow and the Orinoco plume. Late Quaternary planktonic foraminiferal assemblages are reported from three middle bathyal piston cores (from NW to SE: En20-2, En20-10, En20-16) in the Leeward Islands. En20-2 was obtained closest to the 200 m bathymetric contour, En20-10 farthest offshore. The bathyal benthonic foraminifera from En20-2 are indicative of high surface productivity. The planktonic foraminiferal assemblages differ between the cores. The “''Globigerinoides ruber'' group” (= white and pink ''G. ruber'' + ''G. cyclostomus'') typically increases shoreward, but in this study it was most abundant in En20-10. ...... Comparison with benthonic foraminiferal distributions suggests that the following planktonic species have potential as indicators of surface productivity, ''Globigerinella aequilateralis'', ''Globigerinita glutinata'' and ''Globorotalia inflata'' being indicative of enhanced surface productivity and ''Globigerinoides immaturus'', ''G. trilobus'' var. and ''Globorotalia tumida'' of low surface productivity. Bottom-up SHE Analysis for Biozone Identification (SHEBI) indicates that each core contains several abundance biozones (ABs), but these do not correlate between the cores. Alpha diversities were S<sub>E</sub> = 8.3 – 14.3 effective species, while beta diversities ranged from 0.65 – 1.54, but only two were statistically significant. Complementarities (64.7–87.6%) indicate that the AB boundaries reflect changes in the relative abundances of species, not overall diversity.
 
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<font size="2">([http://www.sciencedirect.com/science/article/pii/S0377839812000023 ABSTRACT])
 
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---- Wilson, B., in press. [http://www.sciencedirect.com/science/article/pii/S0377839812000023 Biogeography and ecostratigraphy of late quaternary planktonic foraminiferal taphocoenoses in the Leeward Islands, Lesser Antilles, NE caribbean Sea]. Marine Micropaleontology, doi:10.1016/j.marmicro.2011.12.002
 
  
  

Revision as of 17:39, 9 March 2012