01559nas a2200133   4500008004100000245004900041210004900090260001400139520115700153100002801310700002501338700001901363856004301382       2012                        eng d00aOrigins of coral diversity in Southeast Asia0 aOrigins of coral diversity in Southeast Asia  aAmsterdam3 a<p>Southeast 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.</p>
1 aSantodomingo, Nadiezhda1 aJohnson, Kenneth, G.1 aRenema, Willem  uhttps://ipaeg.myspecies.info/node/204702236nas a2200121   4500008004100000245007300041210006900114520176600183100001701949700002601966700001901992856010302011       2012                        eng d00aMollusk faunas as indirect indicators for palaeo-seagrass vegetation0 aMollusk faunas as indirect indicators for palaeoseagrass vegetat3 a<p>Seagrass ecosystems play an important role in sedimentation processes and nutrient cycling and support local biodiversity by providing food and shelter for numerous associated organisms. These ecosystems have been around since the Late Cretaceous. In order to understand their emergence in geological time and their response to past perturbations we have to be able to recognize seagrass communities in the fossil record. However, seagrass itself hardly fossilizes and therefore we are searching for indirect indicators to recognize ancient seagrass vegetation. In this contribution we review molluscan evidence for palaeo-seagrass settings. Indicator species are rare since the majority of seagrass associated molluscs occurs in other marine habitats as well. Furthermore, those habitats appear to be patchy, both spatial and temporal, resulting in mixed occurrences of seagrass and non-seagrass faunas. Often only the high abundance of certain mollusc groups and the general taxonomic composition of a fauna points to seagrass environments. However, the distribution of gastropod trophic guilds in species richness versus abundance data appears to yield patterns that may be very characteristic for the identification of fossil seagrass associated faunas. We are currently applying Indirect PaleoSeagrass Indicators (IPSI&rsquo;s) to a number of fossil and modern shelly samples, both from seagrass and non-seagrass environments. We also briefly review potential sedimentary and geochemical IPSI&rsquo;s as well as fossil groups different than molluscs. Identifying seagrass environments enables us to assess diversity trends in such ecosystems through time and to study their response over time intervals with major environmental and climate change.</p>
1 aReich, Sonja1 aWesselingh, Frank, P.1 aRenema, Willem  uhttps://ipaeg.myspecies.info/content/mollusk-faunas-indirect-indicators-palaeo-seagrass-vegetation02403nas a2200133   4500008004100000245009300041210006900134260003000203520183900233100001702072700002802089700001902117856013302136       2012                        eng d00aLarger benthic foraminifera – faunal pioneers in mixed carbonate-siliciclastic systems0 aLarger benthic foraminifera faunal pioneers in mixed carbonatesi  aCharlotte, NCc04/11/20123 aLarger benthic foraminifera are one of the most abundant and widespread organisms in shallow marine tropical
environments. Their role as rapid colonizers of new substrates has been suggested, but little is still known to support
this idea. To address this question, larger benthic foraminifera assemblages have been studied in the
paleoenvironmental reconstruction of a Langhian (Middle Miocene) shallow-water patch reef, as part of a broader multitaxon
fossil comunity analysis, including corals, coralline algae, and bryozoans. The studied outcrop (approx. 80 m
wide and 25 m thick) is located at the northeast margin of the Kutai Basin near Bontang (Indonesia).
The patch-reef was developed in mixed carbonate-siliciclastic depositional environment and despite the high
terrigenous input affecting water transparency, this reef contains a diverse marine biota. Five different facies types were
distinguished based on lithology and fossil content: foraminifera packstone, bioclastic packstone with foralgal
communities, thin-platy coral sheetstone, platy-tabular coral platestone, and shales. Excluding the fossil barren shales
facies, only larger benthic foraminifera occur in all four remaining facies types, showing the ability to rapidly adapt to
changes in environment. In the current study, high siliciclastic input caused fluctuations in light levels, but also resulted
in deposition of soft-bottom substrate. In newly developed conditions, the larger benthic foraminifera appear first and
mark the initiation of reef growth.
The persistence of LBF throughout the fossil reef succession indicates their high tolerance to terrigenous input and also
highlight the role of foraminifera as primary colonizers, proving themselves as important faunal pioneers, particularly in
mixed carbonate-siliciclastic systems.1 aNovak, Vibor1 aSantodomingo, Nadiezhda1 aRenema, Willem  uhttps://ipaeg.myspecies.info/content/larger-benthic-foraminifera-%E2%80%93-faunal-pioneers-mixed-carbonate-siliciclastic-systems03029nas a2200133   4500008004100000245009200041210006900133260002300202520247700225100001702702700001902719700002902738856012802767       2012                        eng d00aBurdigalian turbid water patch reef environment revealed by larger benthic foraminifera0 aBurdigalian turbid water patch reef environment revealed by larg  aViennac22/04/20123 aAncient isolated patch reefs outcropping from siliciclastic sediments are a trademark for the Miocene carbonate
deposits occurring in East Kalimantan, Indonesia. They develop in transitional shelf sediments deposited between
deltaic and deep marine deposits (Allen and Chambers, 1998). The Batu Putih Limestone (Wilson, 2005) and similar
outcrops in adjacent areas have been characterized as shallow water carbonates influenced by high siliciclastic
input, showing low relief patch reefs in turbid waters. Larger benthic foraminifera (LBF) are excellent markers
for biochronology and paleoenvironmental reconstruction. This study aims to reveal age and paleoenvironment
of a shallow water carbonate patch reef developed in mixed depositional system by using LBF and microfacies
analysis.
The studied section is located near Bontang, East Kalimantan, and is approximately 80 m long and 12 m high.
It is placed within Miocene sediments in the central part of the Kutai Basin. Patch reef and capping sediments
were logged through eight transects along section and divided into nine different lithological units from which
samples were collected. Thin sections and isolated specimens of larger benthic foraminifera were analyzed and
recognized to species level (where possible) providing age and environmental information. Microfacies analysis
of thin sections included carbonate classification (textural scheme of Dunham, 1962) and assemblage composition
of LBF, algae and corals relative abundance. Three environmentally indicative groups of LBF were separated
based on test morphology, habitat or living relatives (Hallock and Glenn, 1986).
Analysed foraminifera assemblage suggests Burdigalian age (Tf1). With use of microfacies analysis nine
successive lithological units were grouped into five facies types. Paleoenvironmental reconstruction of LBF fossil
assemblage indicate two cycles of possible deepening recorded in the section. Based on high muddy matrix
ratio in analyzed thin-sections we still cannot conclude whether they were deeper water assemblage, or that they
occurred in shallower water and influenced by turbid conditions as the result of terrigenous input. According to
preliminary analysis and siliciclastic content in the sediments the later one should be more likely. Further work
will include additional fossil groups analysis (corals, algae and bryozoans), detailed petrographical analysis and
Strontium isotope stratigraphy.1 aNovak, Vibor1 aRenema, Willem1 aProject, the, Throughflo  uhttps://ipaeg.myspecies.info/content/burdigalian-turbid-water-patch-reef-environment-revealed-larger-benthic-foraminifera-000488nas 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-000771nas a2200181   4500008004100000245013200041210006900173260003600242100002500278700002100303700001700324700002800341700001800369700002400387700002500411700001900436856013400455       2012                        eng d00aPalaeoenvironmental reconstruction of a Miocene patch reef in East Kalimantan (Indonesia): a close-up on the bryozoan component0 aPalaeoenvironmental reconstruction of a Miocene patch reef in Ea  aBrno Czech Republicc31/05/20121 aDi Martino, Emanuela1 aTaylor, Paul, D.1 aNovak, Vibor1 aSantodomingo, Nadiezhda1 aRösler, Anja1 aBraga, Juan, Carlos1 aJohnson, Kenneth, G.1 aRenema, Willem  uhttps://ipaeg.myspecies.info/content/palaeoenvironmental-reconstruction-miocene-patch-reef-east-kalimantan-indonesia-close-bryozo00682nas a2200181   4500008004100000245008700041210006900128260001500197100001700212700002800229700001800257700002500275700002000300700002000320700002500340700001900365856011600384       2012                        eng d00aEnvironmental reconstruction of a Langhian patch reef (East Kalimantan, Indonesia)0 aEnvironmental reconstruction of a Langhian patch reef East Kalim  c29/03/20121 aNovak, Vibor1 aSantodomingo, Nadiezhda1 aRösler, Anja1 aDi Martino, Emanuela1 aBraga, Juan, C.1 aTaylor, Paul, D1 aJohnson, Kenneth, G.1 aRenema, Willem  uhttps://ipaeg.myspecies.info/content/environmental-reconstruction-langhian-patch-reef-east-kalimantan-indonesia00669nas a2200181   4500008004100000245007200041210006900113260003100182100002500213700002100238700001700259700002800276700001800304700002400322700002500346700001900371856009700390       2012                        eng d00aBryozoans from a Langhian patch reef in East Kalimantan (Indonesia)0 aBryozoans from a Langhian patch reef in East Kalimantan Indonesi  aCatania, Italyc24/05/20121 aDi Martino, Emanuela1 aTaylor, Paul, D.1 aNovak, Vibor1 aSantodomingo, Nadiezhda1 aRösler, Anja1 aBraga, Juan, Carlos1 aJohnson, Kenneth, G.1 aRenema, Willem  uhttps://ipaeg.myspecies.info/content/bryozoans-langhian-patch-reef-east-kalimantan-indonesia