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Open Access item Modeling approach to regime shifts of primary production in shallow coastal ecosystems

Authors:Zaldívar, José Manuel
Bacelar, Flora S.
Dueri, Sibylle
Marinov, Dimitar
Viaroli, P.
Hernández-García, Emilio
Keywords:Regime shifts, Macrophytes, Macroalgae, Populations and Evolution, Quantitative Methods
Issue Date:23-Feb-2009
Citation:Ecological Modelling (2009), doi: 10.1016/j.ecolmodel.2009.01.022 (In press)
Abstract:Pristine coastal shallow systems are usually dominated by extensive meadows of seagrass species, which are assumed to take advantage of nutrient supply from sediment. An increasing nutrient input is thought to favour phytoplankton, epiphytic microalgae, as well as opportunistic ephemeral macroalgae that coexist with seagrasses. The primary cause of shifts and succession in the macrophyte community is the increase of nutrient load to water; however, temperature plays also an important role. A competition model between rooted seagrass (Zostera marina), macroalgae (Ulva sp.), and phytoplankton has been developed to analyse the succession of primary producer communities in these systems. Successions of dominance states, with different resilience characteristics, are found when modifying the input of nutrients and the seasonal temperature and light intensity forcing.
Description:11 pages, 10 figures, 4 tables.-- Article in press.-- ArXiv pre-print available at: http://arxiv.org/abs/0804.2499
Publisher version (URL):http://dx.doi.org/10.1016/j.ecolmodel.2009.01.022
Appears in Collections:(IFISC) Artículos

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