IIMYC   23581
INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Unidad Ejecutora - UE
artículos
Título:
Species- and community-level responses combine to drive phenology of lake phytoplankton
Autor/es:
WALTERS, ANNIKA; GONZÁLEZ SAGRARIO, MA DE LOS ANGELES; SCHINDLER, DANIEL
Revista:
ECOLOGY
Editorial:
ECOLOGICAL SOC AMER
Referencias:
Año: 2013 vol. 94 p. 2188 - 2194
ISSN:
0012-9658
Resumen:
Global change is leading to shifts in the seasonal timing of growth andmaturation for primary producers. Remote sensing is increasingly used to measure the timingof primary production in both aquatic and terrestrial ecosystems, but there is often a poorcorrelation between these results and direct observations of life-history responses of individualspecies. One explanation may be that, in addition to phenological shifts, global change is alsocausing shifts in community composition among species with different seasonal timing ofgrowth and maturation. We quantified how shifts in species phenology and in communitycomposition translated into phenological change in a diverse phytoplankton community from1962 to 2000. During this time, the aggregate community spring?summer phytoplankton peakhas shifted 63 days earlier. The mean taxon shift was only 3 days earlier and shifts in taxaphenology explained only 40% of the observed community phenological shift. The remainingcommunity shift was attributed to dominant early-season taxa increasing in abundance while adominant late-season taxon decreased in abundance. In diverse producer communitiesexperiencing multiple stressors, changes in species composition must be considered to fullyunderstand and predict shifts in the seasonal timing of primary production.