An artificial neural network analysis of factors controlling ecosystem metabolism in the coastal ocean
2007
Rochelle Newall, Emma J. | Winter, Christian | Barrón, Cristina | Borges, Alberto | Duarte, Carlos M. | Elliott, Mike | Frankignoulle, Michel | Gazeau, Frédéric | Middelburg, Jack J. | Pizay, Marie-Dominique | Gattuso, Jean-Pierre
anglais. peer reviewed
Afficher plus [+] Moins [-]anglais. Knowing the metabolic balance of an ecosystem is of utmost importance in determining whether the system is a net source or net sink of carbon dioxide to the atmosphere. However, obtaining these estimates often demands significant amounts of time and manpower. Here we present a simplified way to obtain an estimation of ecosystem metabolism. We used artificial neural networks (ANNs) to develop a mathematical model of the gross primary production to community respiration ratio (GPP:CR) based on input variables derived from three widely contrasting European coastal ecosystems (Scheldt Estuary, Randers Fjord, and Bay of Palma). Although very large gradients of nutrient concentration, light penetration, and organic-matter concentration exist across the sites, the factors that best predict the GPP:CR ratio are sampling depth, dissolved organic carbon (DOC) concentration, and temperature. We propose that, at least in coastal ecosystems, metabolic balance can be predicted relatively easily from these three predictive factors. An important conclusion of this work is that ANNs can provide a robust tool for the determination of ecosystem metabolism in coastal ecosystems.
Afficher plus [+] Moins [-]Mots clés AGROVOC
Informations bibliographiques
Cette notice bibliographique a été fournie par University of Liège
Découvrez la collection de ce fournisseur de données dans AGRIS