Naslov
Effects of ocean acidification and temperature increase on plaktonic, tunicate, Oikopleura, population dynamics at laboratory and mesocosm scales
(Effects of ocean acidification and temperature increase on planktonic tunicate, Oikopleura, population dynamics at laboratory and mesocosm scales)

Autori
Thompson, Eric ; Bouquet, Jean-Marie ; Dupont, Sam ; Lobon, Carla ; Novac, Aliona ; Nejstgaard, Jens Christian ; Bosak, Sunčica ; Isla, Alejandro ; Dutz, Jorg ; Romanova, Nadja ; Sahzin, Andrey ; Troedsson, Christofer

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Izvornik
2010 ASLO/NABS Joint Summer Meeting - Aquatic sciences: global changes from the center to the edge, Abstract Book / - , 2010, 70-71

Skup
2010 Summer meeting ; Aquatic sciences: global changes from the center to the edge ; Joint meeting with ASLO&NABS

Mjesto i datum
Santa Fe (NM), Sjedinjene Američke Države, 06.06.2010. - 11.06.2010

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Ocean acidification; mesocosm experiment; Oikopleura

Sažetak
Atmospheric CO2 is projected to double by 2100, resulting in elevated temperatures and ocean acidification (OA). A lack of multifactorial studies means limited knowledge on the combined effects of these pressures on ecosystem structure and function. Laboratory data suggest that increasing temperature and decreasing pH, mimicking expected changes, may differentially impact major zooplankton groups. Filter-feeding appendicularians ingest smaller food than copepods, by-passing the microbial loop, and directly transferring bacteria and nanoplankton to higher trophic levels. They are also vectors of global vertical carbon flux through trapping of prey in their frequently discarded houses. We obtained mono-factorial laboratory data suggesting that OA positively affects fitness parameters in Oikopleura through decreased generation time, faster growth, increased survival and egg Atmospheric CO2 is projected to double by 2100, resulting in elevated temperatures and ocean acidification (OA). A lack of multifactorial studies means limited knowledge on the combined effects of these pressures on ecosystem structure and function. Laboratory data suggest that increasing temperature and decreasing pH, mimicking expected changes, may differentially impact major zooplankton groups. Filter-feeding appendicularians ingest smaller food than copepods, by-passing the microbial loop, and directly transferring bacteria and nanoplankton to higher trophic levels. They are also vectors of global vertical carbon flux through trapping of prey in their frequently discarded houses. We obtained mono-factorial laboratory data suggesting that OA positively affects fitness parameters in Oikopleura through decreased generation time, faster growth, increased survival and egg production. To assess these effects in more complex natural ecosystems we have conducted a pilot mesocosm experiment use a 2x2x3 factorial design to assess effects of temperature, pCO2 and phytoplankton regimes on zooplankton population dynamics. Data will be presented showing the extent to which OA and temperature modulation of Oikopleura fitness parameters noted in the laboratory are also observed at the mesocosm scale

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Biologija

POVEZANOST RADA