Assessing the composition of fragmented agglutinated foraminiferal assemblages in ancient sediments: comparison of counting and area-based methods in Famennian samples (Late Devonian)
作者： Catherine Girard , Anne-Béatrice Dufour , Anne-Lise Charruault , Sabrina Renaud
关键词:
摘要: Abstract. Benthic foraminifera have been used as proxies for various paleoenvironmental variables such food availability, carbon flux from surface waters, microhabitats, and indirectly water depth. Estimating assemblage composition based on morphotypes, opposed to genus- or species-level identification, potentially loses important ecological information but opens the way study of ancient time periods. However, ability accurately constrain benthic foraminiferal assemblages has questioned when most abundant are fragile agglutinated forms, particularly prone fragmentation. Here we test an alternate method estimating fragmented assemblages. The cumulated area per morphotype is assessed, i.e., sum all tests fragments a given in sample. percentage each calculated portion total area. Percentages different morphotypes counting methods compared one by analyzed using principal component analyses, co-inertia analysis, Shannon diversity indices. Morphotype percentages further estimate depth microfacies description. not related In cases, deliver highly similar results, suggesting that less time-consuming traditional may provide robust estimates size paleobiological information, instance regarding biomass, should be considered carefully due pervasive issue
harvard.edu
j-micropalaeontol.net参考文章(41)
John William Murray, Ecology and palaeoecology of benthic foraminifera ,(1991)
Francis Lethiers, Jean-Georges Casier, Alain Preat, Ostracods and sedimentology of the La Serre Devonian/Carboniferous stratotype section (La Serre, Montagne Noire, France) Bulletin - Institut royal des sciences naturelles de Belgique. Sciences de la terre. ,vol. 72, pp. 43- 68 ,(2002)
Global events and event stratigraphy in the Phanerozoic Springer. ,(1996) , 10.1007/978-3-642-79634-0
Andrew J. Gooday, Benthic foraminifera (Protista) as tools in deep-water palaeoceanography: environmental influences on faunal characteristics. Advances in Marine Biology. ,vol. 46, pp. 1- 90 ,(2003) , 10.1016/S0065-2881(03)46002-1
Grzegorz Racki, Chapter 2Toward understanding Late Devonian global events: few answers, many questions Developments in Palaeontology and Stratigraphy. ,vol. 20, pp. 5- 36 ,(2005) , 10.1016/S0920-5446(05)80002-0
M.S. Finkenbinder, M.B. Abbott, B.P. Finney, J.S. Stoner, J.M. Dorfman, A multi-proxy reconstruction of environmental change spanning the last 37,000 years from Burial Lake, Arctic Alaska Quaternary Science Reviews. ,vol. 126, pp. 227- 241 ,(2015) , 10.1016/J.QUASCIREV.2015.08.031
Frans J. Jorissen, Christophe Fontanier, Ellen Thomas, Chapter Seven Paleoceanographical Proxies Based on Deep-Sea Benthic Foraminiferal Assemblage Characteristics Developments in Marine Geology. ,vol. 1, pp. 263- 325 ,(2007) , 10.1016/S1572-5480(07)01012-3
Daniela N. Schmidt, Sabrina Renaud, Jörg Bollmann, Response of planktic foraminiferal size to late Quaternary climate change Paleoceanography. ,vol. 18, pp. n/a- n/a ,(2003) , 10.1029/2002PA000831
Meryem Mojtahid, Rose Manceau, Ralf Schiebel, Rick Hennekam, Gert J. de Lange, Thirteen thousand years of southeastern Mediterranean climate variability inferred from an integrative planktic foraminiferal‐based approach Paleoceanography. ,vol. 30, pp. 402- 422 ,(2015) , 10.1002/2014PA002705
Kenneth P. Severin, Test morphology of benthic foraminifera as a discriminator of biofacies Marine Micropaleontology. ,vol. 8, pp. 65- 76 ,(1983) , 10.1016/0377-8398(83)90005-1