Abundance and Structure of the Zooplankton Community During a Post-eruptive Process: The Case of the Submarine Volcano Tagoro (El Hierro; Canary Islands), 2013-2018

The mesozooplankton community was analyzed over a 6-year period (2013-2018) during the post-eruptive stage of submarine volcano Tagoro, located south island El Hierro (Canary Archipelago, Spain). Nine cruises from March 2013 to 2018 were carried out in two different seasons, spring (March-April) and autumn (October). A high-resolution study across main cones Tagoro volcano, as well large number reference stations surrounding (unaffected by volcano). zooplankton at showed high similarity with more than 85% variation abundance composition attributable seasonal differences. Moreover, our data an increase waters affected higher presence non-calanoid copepods decline diversity copepod community, indicating that volcanic inputs have significant effect on these organisms. Fourteen groups found but dominant (79%) 59 genera 170 species identified. Despite number, less 30 presented larger 1%. Oncaea Clausocalanus most abundant followed Oithona Paracalanus (60%). dominated (>2%): O. media, plumifera , setigera among non-calanoids M. clausi, P. nanus parvus, C. furcatus, arcuicornis N. minor calanoids. After initial low consequence eruption, observed last years study, where besides small Clausocalanus, Cyclopoids seem good adaptive strategy new water conditions. area indicate important changes occurred. emissions evident when cooler mixing layer deeper. Further longer research is recommended monitor natural laboratory volcano.