PERSONAL DE APOYO
UIBRIG RomÁn Armando
artículos
Título:
Long-term changes on estuarine ciliates linked with modifications on wind patterns and water turbidity
Autor/es:
LÓPEZ ABBATE, M.C.; MOLINERO,J.C.; PERILLO, G.; BARRÍA DE CAO, M.S.; PETTIGROSSO, R.E.; GUINDER, V.; UIBRIG, R.; BERASATEGUI, A. A.; VITALE, A. J.; MARCOVECCHIO J. E.; HOFFMEYER , M.S.
Revista:
MARINE ENVIRONMENTAL RESEARCH
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2018
ISSN:
0141-1136
Resumen:
Planktonic ciliates constitute a fundamental component among microzooplankton and play a prominent role incarbon transport at the base of marine food webs. How these organisms respond to shifting environmentalregimes is unclear and constitutes a current challenge under global ocean changes. Here we examine a multiannualfield survey covering 25 years in the Bahía Blanca Estuary (Argentina), a shallow, flood-plain systemdominated by wind and tidal energy. We found that the estuary experienced marked changes in wind dominantregimes and an increase in water turbidity driven from the joint effect of persistent long-fetch winds and theindirect effect of the Southern Annular Mode. Along with these changes, we found that zooplankton components,i.e. ciliates and the dominant estuarine copepod Acartia tonsa, showed a negative trend during the period1986?2011. We showed that the combined effects of wind and turbidity with other environmental variables(chlorophyll, salinity and nutrients) consistently explained the variability of observed shifts. Tintinnids weremore vulnerable to wind patterns and turbidity while showed a loss of synchrony with primary productivity.Water turbidity produced a dome-like pattern on tintinnids, oligotrichs and A. tonsa, implying that the highestabundance of organisms occurred under moderate values (∼50 NTU) of turbidity. In contrast, the response towind patterns was not generalizable probably owing to species-specific traits. Observed trends denote that windinducedprocesses in shallow ecosystems with internal sources of suspended sediments, are essential on ciliatedynamics and that such effects can propagate trough the interannual variability of copepods.