Limnological features and zooplankton composition in high altitude lakes from Tierra del Fuego, Argentina
DOI:
https://doi.org/10.25260/EA.25.35.2.0.2528Keywords:
high altitude lakes, mesozooplankton, dissolved organic carbon, chlorophyll aAbstract
During the period encompassed between December 2022 and January 2023, 8 high altitude lakes (294-871 m a. s. l.) from the Andean Mountain Range in Tierra del Fuego were monitored to describe their limnological characteristics and mesozooplankton composition (copepods and cladocerans) during early summer. The lakes covered a gradient of dissolved organic carbon (DOC, 1-14 mg/L), color (a440, 8.1-19.6 m-1), total nitrogen (TN, 0.56-0.92 mg/L) and phytoplankton chlorophyll a (chl-a, 0.22-4.10 µg/L). Total species richness was 8 including all sites, ranging from 2 to 5 at each lake. The highest richness was observed in Óvalo, the lower elevation lake, most colored, with highest DOC, TN and Chl-a concentration. This finding allows us to hypothesize that larger resources content and photoprotection from colored organic matter allowed the development of a more diverse zooplankton community.
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