Colimit

The few studies that exist on Fe control of bacterial degradation in HNLC waters agreed that bacterio-plankton is first C-limited as a consequence of low primary production due to Fe limitation and not directly limited by Fe (Hutchins et al. 1998 Church et al. 2000 Kirchman et al. 2000). As reported above, the amount of TOC, potential OC available for bacteria, was similar in our HFe and LFe experiments and therefore bacteria could be colimited by two major factors the availability of Fe and the quality of the organic matter. These factors cannot be discriminated in our experiments. HFe bioassays contained, in addition to increased Fe, a better quality of OM than the LFe bioassays. Moreover, as the distribution in dissolved and particulate organic carbon was affected by Fe availability in the phytoplanktonic cultures, the response of bacteria to different size pool of organic matter (DOM-TOM) was also investigated. 

MUls, M. M., Ridame, C., Davey, M., La Roche, J., and Geider, R. J. (2004). Iron and phosphorus colimit nitrogen fixation in the eastern tropical North Adantic. Nature 429, 292—294. 

Armstrong, R. A. (1999). An optimization-based model of bon-bght-ammonium colimitation of nitrate uptake and phytoplankton growth. Limnol. Oceanogr. 44, 1436-1446. 

Aumont, O., Maier-Reimer, E. B. S., and Monfray, P. (2003). An ecosystem model of the global ocean including Fe, Si, P colimitations. Global Biogeochem. Cycles 17, 1060, doi 1010.1029/ 2001GB001745. 

The general principle of colimitation of photosynthesis by biochemistry and diffusion provides the basis for understanding most of the adjustments by individual leaves to minimize the environmental limitations of photosynthesis. 

We reserve the s3rmbol lirp for denoting direct limits of small directed systems in A, i.e., colimits of functors Q C A where C is the category associated to a small preordered set in which any two elements have an upper bound [M, p. 11, p. 211]. All such lim s exist in an abelian category iff is small-cocomplete [M, p. 212, Theorem 1]. Similarly, an additive functor T . 4. 4 is cocontinuous iff it is right-exact and coimnutes with all lim s. 

The right adjoint functor of /, which we denote by f also exists, as Ab°P has arbitrary small colimits (i.e., Ab has small limits). The functor... 

As it is a right adjoint of the functor preserves arbitrary limits. As it is a left adjoint of the functor / od preserves arbitrary colimits. 

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