Marine, Wilhelm

Pietruszka J, Wilhelm T (2003) Total synthesis of marine oxylipins constanolactone A and B. Synlett 11 1698-1700... 

The microbial loop concept has been the prevailing paradigm for marine microbial food webs for two decades and has stimulated work on DOM sources and composition, rates of biomass production, transfer efficiencies, and respiratory losses (Benner, 1998 del Giorgio and Cole, 2000 Ducklow, 2000 Williams, 2000). The only major modification has arisen from new information on the abundance and ecology of viruses (Wilhelm and Suttle, 1999 Fuhrman, 1999, 2000). 

Poorvin, L., Rinta-Kanto, J. M., Hutchins, D. A., and Wilhelm, S. W. (2004). Viral release of iron and its bioavailability to marine plankton. Limnol. Oceanogr. 49, 1734-1741. 

It appears that cobalt plays a particularly important role in the growth of cyanobacteria (Saito et al, 2002 Sunda and Huntsman, 1995b). Both Prochlorococcus and Synechococcus show an absolute cobalt requirement that zinc cannot substitute for (Figure 18(a)). The growth rate of Synechococcus is little affected by low zinc concentrations, except in the presence of cadmium which then becomes extremely toxic (Saito et al, personal communication). The biochemical processes responsible for the major cellular utilization of zinc and cobalt in marine cyanobacteria are unknown, however. These metals may be involved in carbonic anhydrase and/or other hydrolytic enzymes. Cobalamin (vitamin B12) synthesis is a function of cobalt in these organisms, yet B12 quotas tend to be very small (on the order of only 0.01 p.mol (mol C) ) and hence are not likely represent a significant portion of the cellular cobalt (Wilhelm and Trick, 1995). 

Kremling, K., Wilhelm, G., 1997. Recent Increase ofthe Calcium Concentrations in Baltic Sea Waters. Marine Pollution Bulletin, 34, 763-767. 

W.H. Jeffrey, J.P. Kase, S.W. Wilhelm (2000). UV radiation effects on heterotrophic bacterioplankton and viruses in marine ecosystems. In S.J. de Mora, S. Demers, M. Vernet (Eds). The Effects of UV Radiation on Marine Ecosystems (pp. 206-236). Cambridge University Press, Cambridge. 

S.W. Wilhelm, M.G. Weinbauer, C.A. Suttle, R.J. Pledger, D.L. Mitchell (1998). Measurements of DNA damage and photoreactivation imply that most viruses in marine surface waters are infective. Aquat. Microb. Ecol, 14, 215-222. 

M.G. Weinbauer, S.W. Wilhelm, C.A. Suttle, D.R. Garza (1997). Photoreactivation compensates for UV damage and restores infectivity to natural marine virus communities. Appl. Environ. Microbiol., 63, 2200-2205. 

Kremling K and Wilhelm G (1997) Recent increase of calcium concentrations in Baltic Sea waters. Marine Pollution Bulletin 34 161-161. 

Trick CG and Wilhelm SW (1995) Physiological changes in coastal marine cyanobacterium Synechococcus sp. PCC 7002 exposed to low ferric ion levels. Marine Chemistry 50 207-217. 

Wilhelms, A. Larter, S.R. Origin of tar mats in petroleum reservoirs part It formation mechanisms for tar mats. Marine Petrol. Geol. 1994,11,442-456. 

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