INVESTIGADORES
QUIROGA Maria Victoria
congresos y reuniones científicas
Título:
Composition of picoplanktonic eukaryotic communities in five peat bog pools in Argentinean Tierra del Fuego
Autor/es:
LARA, ENRIQUE; GONZÁLEZ GARRAZA, GABRIELA; SINGER DAVID; SEPPEY CHRISTOPHE; MULOT MATTHIEU; LLAMES MARÍA EUGENIA; QUIROGA, MA. VICTORIA; MATALONI, GABRIELA
Lugar:
Frasne
Reunión:
Congreso; DNA Watch - Using environmental and degraded DNA analysis to understand biodiversity, food webs and ecosystem functioning. First Emerging Topics meeting; 2013
Institución organizadora:
Réseau Franco-Suisse, Environnement-Homme-Territoire
Resumen:
We investigated the composition of eukaryotic picoplankton communities of five pools located in the Rancho Hambre peat bog in Tierra del Fuego, by using Illumina HiSeq massive sequencing approach. Our analyses showed the prevalence of mixotrophic (i.e. chrysophyceae) over strictly phototrophic organisms in all pools, possibly as an adaptation to the low dissolved nutrient concentrations in these environments. Reads affiliated to parasitic taxa (mostly Perkinsea and Chytridiomycota) are abundantly represented, suggesting an important and neglected impact of these organisms in the foodwebs. Interestingly, the most represented sequence in all lakes belonged to an unidentified cercozoan clade ("10") whose lifestyle is currently unknown but which might have a considerable ecological importance due to its prevalence. This preliminary study shows the importance of environmental DNA studies to identify the key players in different ecosystems (which would not have been detected by conventional microscopy) but suggests that further work is necessary to identify their exact roles.