CHLOROPHYLL a BIOMASS AND ACCESSORY CHLOROPHYLL PIGMENTS IN THE SHALLOW COASTAL ZONE AT ADMIRALTY BAY, ANTARCTICA: COMPARISON BETWEEN TWO CONSECUTIVE AUSTRAL SUMMERS

Pinto, Fernanda de Alcântara Vaz; Barrera-Alba, José Juan; Neveux, Jacques; Tenenbaum, Denise Rivera

doi:10.4322/apa.2015.015

Cited by 1 publication

(1 citation statement)

References 16 publications

(25 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This, in turn, can be reflected throughout all the trophic levels of the regional trophic web (Moline et al, 2004;Schofield et al, 2010;Lange et al, 2014;Saba et al, 2014). Climate change in WAP (e.g., increase in temperature and environmental variables) has driven modifications in phytoplankton size (Barrera-Alba et al, 2012Lange et al, 2014;Vanzan et al, 2015), composition, biomass and community structure (Kopczyńska, 2008;Montes-Hugo et al, 2009;Piquet et al, 2011;Lange et al, 2014;Tenório et al, 2015;Mendes et al, 2018;Russo et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Abiotic Changes Driving Microphytoplankton Functional Diversity in Admiralty Bay, King George Island (Antarctica)

et al. 2019

Self Cite

View full text Add to dashboard Cite

Environmental gradients can provide habitat-specific scenarios for community functional diversity (FD) that determine the composition of populations on both spatial and temporal scales. The western shelf of the Antarctic Peninsula has experiencing increasing air temperatures while the climate is transitioning to a warm-humid sub-Antarctic-type of climate. As a consequence, abiotic changes are leading to alterations in the trophic web. Microphytoplankton FD was analyzed across environmental gradients of sea surface temperature, salinity, meltwater percentage and nutrient availability in Admiralty Bay, South Shetland Islands, Western Antarctic Peninsula. Samples were collected during the austral summer from 2009 to 2011 and from 2013 to 2015, at Admiralty Bay for which FD indices were calculated based on species traits. The amount of meltwater (MW) present in Admiralty Bay groups microphytoplankton into communities according to physiological and ecological tolerances, thus leading to a greater FD. When meltwater dominated the bay (>2.25% MW scenarios iii-2013-14 and iv-2014-15), diatoms and dinoflagellates were codominant. An increase in the dinoflagellate fraction of microplankton, notably with auxotrophic and mixotrophic nutrition mode, can be considered a trigger for changes in the structure of the Antarctic food web. Our results suggest using Admiralty Bay as a model for studies on changes in microphytoplankton community composition and FD.

show abstract