This report provides details of CTD data collected in 2005 and 2006 in the equatorial Pacific Ocean during cruises to service the TAO/TRITON array, a network of deep ocean moored buoys deployed to support ENSO research and forecasting. The TAO/TRITON array, completed in 1994, consists of approximately 70 deep ocean moorings within 8 degrees of the equator spanning the Pacific Basin from 95◦W to 137◦E. Moorings west of 165◦E are maintained by the Japan Agency for Marine Earth Science and Technology (JAMSTEC).
This report provides details of CTD data collected in 2005 and 2006 in the equatorial Pacific Ocean during cruises to service the TAO/TRITON array, a network of deep ocean moored buoys deployed to support ENSO research and forecasting. The TAO/TRITON array, completed in 1994, consists of approximately 70 deep ocean moorings within 8 degrees of the equator spanning the Pacific Basin from 95◦W to 137◦E. Moorings west of 165◦E are maintained by the Japan Agency for Marine Earth Science and Technology (JAMSTEC).
Anthropogenic nutrient inputs enhance microbial respiration within many coastal ecosystems, driving concurrent hypoxia and acidification. During photosynthesis, Symbiodinium spp., the microalgal endosymbionts of cnidarians and other marine phyla, produce O2 and assimilate CO2 , and thus potentially mitigate the exposure of the host to these stresses. However, such a role for Symbiodinium remains untested for non-calcifying cnidarians.
Hypoxia and ocean acidification are two consequences of anthropogenic activities. These global trends occur on top of natural variability. In environments such as estuarine areas, short-term acute pH and O2 fluctuations are occurring simultaneously. The present study tested the combined effects of short-term seawater acidification and hypoxia on the physiology and energy budget of the thick shell mussel Mytilus coruscus. Mussels were exposed for 72 h to six combined treatments with three pH levels (8.1, 7.7 and 7.3) and two dissolved oxygen (DO) levels (2 mg L−1, 6 mg L−1).
By the end of this century, anthropogenic carbon dioxide (CO2) emissions are expected to decrease the surface ocean pH by as much as 0.3 unit. At the same time, the ocean is expected to warm with an associated expansion of the oxygen minimum layer (OML). Thus, there is a growing demand to understand the response of the marine biota to these global changes. We show that ocean acidification will substantially depress metabolic rates (31%) and activity levels (45%) in the jumbo squid, Dosidicus gigas, a top predator in the Eastern Pacific. This effect is exacerbated by high temperature.