TY - JOUR
T1 - Effects of ocean acidification, temperature and nutrient regimes on the appendicularian Oikopleura dioica: a mesocosm study
AU - Troedsson, Christofer
AU - Bouquet, Jean-Marie
AU - Lobon, Carla M.
AU - Novac, Aliona
AU - Nejstgaard, Jens C.
AU - Dupont, Sam
AU - Bosak, Suncica
AU - Jakobsen, Hans Henrik
AU - Romanova, Nadezda
AU - Pankoke, Lene M.
AU - Isla, Alejandro
AU - Dutz, Jörg
AU - Sazhin, Andrey F.
AU - Thompson, Eric M.
AU - Dupont, Sam
AU - Pörtner, Hans-Otto
PY - 2012
Y1 - 2012
N2 - Increasing pCO2 is hypothesized to induce shifts in plankton communities toward smaller cells, reduced carbon export rates and increased roles of gelatinous zooplankton. Appendicularians, among the most numerous pan-global “gelatinous” zooplankton, continuously produce filter-feeding houses, shortcutting marine food webs by ingesting submicron particles, and their discarded houses contribute significantly to carbon fluxes. We present a first mesocosm-scale study on the effects of temperature, pCO2 and bloom structures on the appendicularian, Oikopleura dioica. There were effects of temperature and nutrients on phytoplankton communities. No shifts in functional phytoplankton groups, nor changes in particle sizes/morphotypes, known to impact appendicularian feeding, were observed under manipulated pCO2 conditions. However, appendicularian abundance was positively correlated with increased pCO2, temperature and nutrient levels, consistent with hypotheses concerning gelatinous zooplankton in future oceans. This suggests appendicularians will play more important roles in marine pelagic communities and vertical carbon transport under projected ocean acidification and elevated temperature scenarios.
AB - Increasing pCO2 is hypothesized to induce shifts in plankton communities toward smaller cells, reduced carbon export rates and increased roles of gelatinous zooplankton. Appendicularians, among the most numerous pan-global “gelatinous” zooplankton, continuously produce filter-feeding houses, shortcutting marine food webs by ingesting submicron particles, and their discarded houses contribute significantly to carbon fluxes. We present a first mesocosm-scale study on the effects of temperature, pCO2 and bloom structures on the appendicularian, Oikopleura dioica. There were effects of temperature and nutrients on phytoplankton communities. No shifts in functional phytoplankton groups, nor changes in particle sizes/morphotypes, known to impact appendicularian feeding, were observed under manipulated pCO2 conditions. However, appendicularian abundance was positively correlated with increased pCO2, temperature and nutrient levels, consistent with hypotheses concerning gelatinous zooplankton in future oceans. This suggests appendicularians will play more important roles in marine pelagic communities and vertical carbon transport under projected ocean acidification and elevated temperature scenarios.
U2 - 10.1007/s00227-012-2137-9
DO - 10.1007/s00227-012-2137-9
M3 - Journal article
VL - 160
SP - 2175
EP - 2187
JO - Marine Biology
JF - Marine Biology
SN - 0025-3162
IS - 8
ER -