info:eu-repo/semantics/article
The plankton communities from peat bog pools: Structure, temporal variation and environmental factors
Fecha
2013-11-26Registro en:
Quiroga, María Victoria; Unrein, Fernando; Gonzalez Garraza, Gabriela Carolina; Kuppers, Gabriela Cristina; Lombardo Berchesi, Ruben Jorge; et al.; The plankton communities from peat bog pools: Structure, temporal variation and environmental factors; Oxford University Press; Journal of Plankton Research; 35; 6; 26-11-2013; 1234-1253
0142-7873
1464-3774
CONICET Digital
CONICET
Autor
Quiroga, María Victoria
Unrein, Fernando
Gonzalez Garraza, Gabriela Carolina
Kuppers, Gabriela Cristina
Lombardo Berchesi, Ruben Jorge
Marinone, María Cristina
Menu Marque, Silvina
Vinocur, Alicia Liliana
Mataloni, Maria Gabriela
Resumen
This is the first characterization of the structure and temporal variation of the plankton communities comprising the complete food web in five peat bog pools related to environmental factors over two consecutive ice-free periods in Tierra del Fuego (548S). Remarkably, picophytoplankton was composed solely of eukaryotic cells, surpassing the dominance expectations for these acidic water bodies, whereas testaceans were virtually absent, even as tychoplankters. Abundances of the different planktonic communities were slightly higher than those reported for Northern Hemisphere peat bogs and humic lakes. Mixotrophic nutrition prevailed among nano- and microphytoplankters, a strategy also common in humic lakes. The structures in spring of the planktonic communities were similar. In contrast, in late summer there were differences in the abundance and biomass of the different trophic compartments among small, shallow water bodies and large ones. These seem to be dictated by distinct pool size-driven patterns of water temperature variation. A general shift in the control of heterotrophic flagellates abundance in the pools occurred, changing from bottom-up regulation in spring to top-down control in late summer related to.