We seek papers that address these issues as well as those addressing basic questions of prokaryote physiology and biogeography. A, Montreal, Quebec, Canada. Susana Augusti Instituto Mediterr neo de Estudios Avanzados, CSIC-Univ. Accepted loss factors for phytoplankton are sedimentation and grazing, and perhaps secondarily, some modest diffusive losses and viral attack. Therefore the new evidence that important or even dominant fractions of the potential planktonic production are lost to direct cell death and nonviral lysis are exciting and controversial.
Organic matter drives metabolism in freshwater ecosystems.
It is becoming increasingly evident that the proportion of organic matter derived from terrestrial sources can be much greater than that produced autochthonously in both lakes and rivers. Much of the allochthonous organic matter enters fresh waters as soluble and colloidal organic matter of varying degrees of biological availability. This special session will be devoted to organic loading pathways, quantities of organic matter derived from different sources, quality of the organic matter, and transformation pathways of the particulate and soluble organic matter as it passes from terrestrial sources and once it enters fresh waters.