INVESTIGADORES
GUINDER Valeria Ana
artículos
Título:
Ephemeral parasitism on blooming diatoms in a temperate estuary
Autor/es:
GUINDER VA; CARCEDO MC; BUZZI N.; MOLINERO JC; LÓPEZ ABBATE MC; FERNÁNDEZ SEERINI MD; BIANCALANA F; KÜHN S
Revista:
MARINE AND FRESHWATER RESEARCH
Editorial:
CSIRO PUBLISHING
Referencias:
Lugar: Collingwood; Año: 2017
ISSN:
1323-1650
Resumen:
Parasites of phytoplankton influencephytoplankton bloom dynamics and may severely affect the type of food availablefor higher trophic levels. The incidence of such infection diseases is expectedto increase across ecosystems worldwide under scenarios of Global change.  Here we report a massive parasite infection on two dominantdiatoms of the austral winter bloom ? Thalassiosirapacifica and Chaetoceros diadema? recorded during an extreme precipitation event in the Bahía Blanca Estuary.  The infection was concomitant with a markeddrop in water salinity and affected more than 40 % of host populations. Whilethe parasite on C. didema was notidentified, the parasite on T. pacificawas most likely Pirsonia sp., ananoflagellate with high host specificity. After the intense rainy period andthe parasitic infection, the phytoplankton biomass dropped (>80 %) and thecommunity structure shifted to a dominance of smaller species i.e. Thalassiosiracurviseriata, T. hibernalis and T.minima. We discuss the implications that these modifications might have inthe food web dynamics and the potential relation between precipitationdriven-modifications in water properties and parasitism emergence in coastaleutrophic environments.