Romero G. Q., Marino N. A. C., MacDonald A. A. M., Cereghino R., Trzcinski M. K., Mercado D. A., Leroy Céline, Corbara B., Farjalla V. F., Barberis I. M., Dezerald O., Hammill E., Atwood T. B., Piccoli G. C. O., Bautista F. O., Carrias J. F., Leal J. S., Montero G., Antiqueira P. A. P., Freire R., Realpe E., Amundrud S. L., de Omena P. M., Campos A. B. A., Kratina P., O'Gorman E. J., Srivastava D. S. (2020). Extreme rainfall events alter the trophic structure in bromeliad tanks across the Neotropics. Nature Communications, 11 (1), p. [8 p.]. ISSN 2041-1723.
Titre du document
Extreme rainfall events alter the trophic structure in bromeliad tanks across the Neotropics
Année de publication
2020
Auteurs
Romero G. Q., Marino N. A. C., MacDonald A. A. M., Cereghino R., Trzcinski M. K., Mercado D. A., Leroy Céline, Corbara B., Farjalla V. F., Barberis I. M., Dezerald O., Hammill E., Atwood T. B., Piccoli G. C. O., Bautista F. O., Carrias J. F., Leal J. S., Montero G., Antiqueira P. A. P., Freire R., Realpe E., Amundrud S. L., de Omena P. M., Campos A. B. A., Kratina P., O'Gorman E. J., Srivastava D. S.
Source
Nature Communications, 2020,
11 (1), p. [8 p.] ISSN 2041-1723
Changes in global and regional precipitation regimes are among the most pervasive components of climate change. Intensification of rainfall cycles, ranging from frequent downpours to severe droughts, could cause widespread, but largely unknown, alterations to trophic structure and ecosystem function. We conducted multi-site coordinated experiments to show how variation in the quantity and evenness of rainfall modulates trophic structure in 210 natural freshwater microcosms (tank bromeliads) across Central and South America (18 degrees N to 29 degrees S). The biomass of smaller organisms (detritivores) was higher under more stable hydrological conditions. Conversely, the biomass of predators was highest when rainfall was uneven, resulting in top-heavy biomass pyramids. These results illustrate how extremes of precipitation, resulting in localized droughts or flooding, can erode the base of freshwater food webs, with negative implications for the stability of trophic dynamics. The amount and frequency of rainfall structures aquatic food webs. Here the authors show that in tropical tank bromeliads, lower trophic levels are more abundant in stable rainfall conditions, while biomass pyramids are inverted in conditions with periodic droughts.
Plan de classement
Sciences du milieu [021]
;
Ecologie, systèmes aquatiques [036]
;
Hydrologie [062]
;
Sciences du monde végétal [076]
;
Etudes, transformation, conservation du milieu naturel [082]
Description Géographique
AMERIQUE DU SUD ; AMERIQUE CENTRALE ; ARGENTINE ; CARDOSO ILE ; COLOMBIE ; COSTA RICA ; GUYANE FRANCAISE ; PORTO RICO ; BRESIL ; MACAE ; CARDOSO ILE
Localisation
Fonds IRD [F B010079373]
Identifiant IRD
fdi:010079373
