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Impact of eutrophication and river management within a framework of ecosystem t...
Marques, João C.; Nielsen, Søren N.; Pardal, Miguel A.; Jørgensen, Sven E.Eutrophication became a dominant process in the Mondego estuarine system in the 1980s, presumably as a result of excessive nutrient release into coastal waters. The main symptoms were the occurrence of seasonal blooms of Enteromorpha spp., green macroalgae, and a drastic reduction of the Zostera noltii meadows. Previous results suggest that this process will determine changes in species composition at other tro...
Nuclear DNA in the determination of weighing factors to estimate exergy from or...
Fonseca, Júlio C.; Marques, João C.; Paiva, Artur A.; Freitas, Albertina M.; Madeira, Vítor M. C.; Jørgensen, Sven E.The application of ecological exergy as a suitable system-oriented development indicator of ecosystems and the estimation proposals from biomass are revised. DNA contents (C-values) of several groups of organisms are figured, either determined by flow cytometry or taken from literature. The applicability of DNA contents for determination of weighing factors to estimate ecological exergy from the biomass of orga...
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