Willem Renema
Conservator Micropaleontology |
| Contact address:
Nationaal Natuurhistorisch Museum  
Postbus 9517 2300 RA Leiden The Netherlands |
Paleoecology and Paleoclimatology
|
tel
:+31-71 5687576
fax :+31-71 5687666 |
Research interest
Ph D: Diversity trends in Cenozoic larger foraminifera in SE AsiaAt the moment I am in the last phase of finishing my PhD on Cenozoic larger foraminifera in SE Asia, predominantly Indonesia. The first 4 chapter deal with parameters determining the distribution of extant larger foraminifera on reefs at Sulawesi (Spermonde Archipelago) and the Phillipines (Cebu). The last chapters consist of a revision of the genera Nummulites, Palaeonummulites, Planocamerinoides and Assilina in Indonesia and a comparison of the diversity (taxonomic and morphological) trend of these groups between the West and East Tethys
Palaeogene larger foraminifera
The first of the two research programs I am involved in deals with the diversity of larger benthic foraminifera in the Cenozoic, and is a continuation of my PhD study. The goals are to complete the record on diversity and morpho space use in Recent and Cenozoic larger benthics. During the Cenozoic, the palaeogeografy and palaeoclimate in SE Asia changed dramatically, which has its effect on local and global diversity. I emphasis on the occurrence of larger benthics in SE Asia, but work also on a compilation of data from other parts of the Tethys as comparison. Most effort is done for the Palaeogene up to now.
Neogene benthic foraminifera
The second programme deals with the response of benthic foraminifera (both large and small ones) to variations in climate in during the Plio- and Pleistocene. The onset of glaciation at the North Pole resulted in (from) a global cooling. The west ward shift of the West Pacific Warm Pool caused a local warming of sea surface temperature In the Indo West Pacific however. The drops in sea-level in the galicals caused a decrease in environment for shallow marine taxa. In this programme we assess the assemblage composition and diversity of shallow marine environments during glacials and interglacials, in order to determine the maintenance and origin of high diversity in the IWP.
Recent Publications
Wesselingh, F.P., Cadée, G.C. & Renema, W. (1999). Flying high: on the airborne dispersal of aquatic organisms as illustrated by the distribution histories of the gastropod genera Tryonia and Planorbarius. Geologie & Mijnbouw, 78: 165-174.
Reemer, M., B. van Aartsen, W. Renema, J. Smit & W. van Steenis. 2000. Bijzondere vondsten van zweefvliegen in Nederland (Diptera: Syrphidae). Nederlandse Faunistische Mededelingen 12: 155-164
Renema, W. & Wakkie, B. 2001. Het zweefvliegengenus Callicera in Nederland en Belgie (Diptera: Syrphidae). Nederlandse Faunistische Mededelingen 14: 1-12
Renema, W., Hoeksema, B.W. & Van Hinte, J.E., 2001. Larger benthic foraminifera and their distribution patterns on the Spermonde Shelf, South Sulawesi. Zoologische Verhandelingen 334: 115-150
Renema, W. & Troelstra, S. R., 2001. Larger foraminifera distribution on a mesotrophic carbonate shelf in SW Sulawesi (Indonesia). Palaeogeografie, Paleoclimatologie, Paleoecologie. 175 (1-4): 125-147
Wesselingh, F.P., T. Meijer, R.H. de Bruyne, P. de Wolf, G.C. Cadee & W. Renema (2001). Fossiele schelpen van het Texelse strand.- Spirula 321: 69-71.
Smit, J., Renema, W. and Aartsen, B. van, 2001. De zweefvliegen Chrysotoxum intermedium and Chrysotoxum fasciolatum nieuw voor de Nederlandse fauna (Diptera: Syrphidae). Nederlandse Faunistische Mededelingen 15: 117-122.
Renema, W., 2001. Drie maal is scheepsrecht, de zweefvlieg Chalcosyrphus eunotus terug op de Nederlandse lijst (Diptera: Syrphidae). Nederlandse Faunistische Mededelingen 15: 111-116.
Smit, J., Reemer, M. and Renema, W., 2001. Vijf soorten van het zweefvliegengenus Cheilosia nieuw voor Nederland (Diptera: Syrphidae). Nederlandse Faunistische Mededelingen 15: 123-139.