02197nas a2200133 4500008004100000245006000041210005300101260001200154520178200166100002801948700002501976700001902001856004302020 2012 eng d00aOn the origins of the coral diversity in Southeast Asia0 aorigins of the coral diversity in Southeast Asia c07/20123 a
Evidences from palaeontological and molecular studies suggest that the formation of the SE Asian ancestral centre of diversity occurred during the Miocene. Under the umbrella of the Throughflow project, delta-front patch reefs from 42 outcrops were studied in East Kalimantan (Indonesia), including extensive collections of tens of thousands of specimens within 265 samples. This research aims to answer how diverse were corals during the Miocene and which environmental factors played a role in their diversification on both, temporal and spatial scales. Coral morphologies seem to respond to the gradient of siliciclastic input created by the Mahakan Delta system. Platy-coral assemblages were common in the vicinity of the delta, characterized by a higher turbid-water regime, and mainly from the Early to Middle Miocene (up to Serravallian age). On the other hand, communities of branching corals mixed with scattered massive coral heads were more frequent during the Late Miocene (Tortonian to Messinian age) in settings located towards the north, far-off the delta influence. Although preliminary (<10% of samples examined), species diversity was high in both platy and branching coral assemblages, and comparable to modern coral settings living under similar environmental conditions. A total of 51 morphospecies (36 genera) have been identified so far, from which only three genera are considered as extinct, Dictyaraea, Anisocoenia, and Fungophyllia. Whether the observed species turnover is due to major global environmental changes after the Middle Miocene, or it is merely explained by switching of the Mahakan Delta gradient, or a combination of both, is an aspect to be examined in further integrated analysis including geochemistry and sedimentology.
1 aSantodomingo, Nadiezhda1 aJohnson, Kenneth, G.1 aRenema, Willem uhttps://ipaeg.myspecies.info/node/204801559nas a2200133 4500008004100000245004900041210004900090260001400139520115700153100002801310700002501338700001901363856004301382 2012 eng d00aOrigins of coral diversity in Southeast Asia0 aOrigins of coral diversity in Southeast Asia aAmsterdam3 aSoutheast Asia hosts the maximum centre of coral diversity. Evidence from palaeontological and molecular studies suggests that the Miocene was an important period for diversification in the region. However, the fossil record is markedly undersampled. Of the \~{}200 species of azooxanthellate corals present in the region, only 49 species are known in the fossil record. As part of the Throughflow ITN project, we are collecting new data to document the Miocene diversity of zooxanthellate and azooxanthellate scleractinians from shallow and deep-water habitats preserved in outcrops of East Kalimantan (5-20 Million years old). This project has completed two five-week long field seasons and is currently processing samples. So far, we have identified the azooxanthellate taxa Caryophyllia, Stephanocyathus, Flabellum, Heterocyathus, and Madrepora. Preservation can be excellent allowing geochemical analysis to understand the paleoenviromental conditions in which these species were living. In combination with parallel studies on shallow water ecosystems, these new data provide insights to the origins of the high diversity in this region.
1 aSantodomingo, Nadiezhda1 aJohnson, Kenneth, G.1 aRenema, Willem uhttps://ipaeg.myspecies.info/node/204700700nas a2200205 4500008004600000245009700046210006900143100002800212700001700240700002400257700002100281700001800302700002500320700002100345700001700366700002400383700001900407700002500426856004300451 Submitted eng d 00aA diverse patch reef from turbid habitats in the Middle Miocene (East Kalimantan, Indonesia)0 adiverse patch reef from turbid habitats in the Middle Miocene Ea1 aSantodomingo, Nadiezhda1 aNovak, Vibor1 aPretković, Vedrana1 aMarshall, Nathan1 aRösler, Anja1 aDi Martino, Emanuela1 aLoGiudice, Elena1 aReich, Sonja1 aBraga, Juan, Carlos1 aRenema, Willem1 aJohnson, Kenneth, G. uhttps://ipaeg.myspecies.info/node/203300488nas a2200133 4500008004100000245006100041210006100102260003800163100002500201700001700226700001900243700002300262856006900285 2012 eng d00aTowards a synthesis of Cenozoic pantropical paleontology0 aTowards a synthesis of Cenozoic pantropical paleontology aCairns, Australiac8-13 July 20121 aJohnson, Kenneth, G.1 aKlaus, James1 aRenema, Willem1 aTodd, Jonathan, A. uhttp://www.icrs2012.com/Downloads/ICRS2012_Book_of_Abstracts.pdf00503nas a2200133 4500008004100000245004900041210004900090260004700139100002800186700002500214700001900239700002900258856008200287 2012 eng d00aOrigins of coral diversity in Southeast Asia0 aOrigins of coral diversity in Southeast Asia aAmsterdam, The Netherlandsc1-6 April 20121 aSantodomingo, Nadiezhda1 aJohnson, Kenneth, G.1 aRenema, Willem1 aProject, the, Throughflo uhttps://ipaeg.myspecies.info/content/origins-coral-diversity-southeast-asia-000655nas a2200133 4500008004100000245010800041210006900149260007600218100002500294700002100319700002800340700001900368856013400387 2011 eng d00aSoutheast Asian and Caribbean Cenozoic Reef-coral diversity and the importance of large new collections0 aSoutheast Asian and Caribbean Cenozoic Reefcoral diversity and t bM. aretz, S. Delculee, J. Denayer, And E. Poty (Eds.)c26-30/August/2011 aJohnson, Kenneth, G.1 aRosen, Brian, R.1 aSantodomingo, Nadiezhda1 aRenema, Willem uhttps://ipaeg.myspecies.info/content/southeast-asian-and-caribbean-cenozoic-reef-coral-diversity-and-importance-large-new-collect