Climate, carbon cycling, and deep-ocean ecosystems
- 17 November 2009
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences of the United States of America
- Vol. 106 (46), 19211-19218
- https://doi.org/10.1073/pnas.0908322106
Abstract
Climate variation affects surface ocean processes and the production of organic carbon, which ultimately comprises the primary food supply to the deep-sea ecosystems that occupy approximate to 60% of the Earth's surface. Warming trends in atmospheric and upper ocean temperatures, attributed to anthropogenic influence, have occurred over the past four decades. Changes in upper ocean temperature influence stratification and can affect the availability of nutrients for phytoplankton production. Global warming has been predicted to intensify stratification and reduce vertical mixing. Research also suggests that such reduced mixing will enhance variability in primary production and carbon export flux to the deep sea. The dependence of deep-sea communities on surface water production has raised important questions about how climate change will affect carbon cycling and deep-ocean ecosystem function. Recently, unprecedented time-series studies conducted over the past two decades in the North Pacific and the North Atlantic at > 4,000-m depth have revealed unexpectedly large changes in deep-ocean ecosystems significantly correlated to climate-driven changes in the surface ocean that can impact the global carbon cycle. Climate-driven variation affects oceanic communities from surface waters to the much-overlooked deep sea and will have impacts on the global carbon cycle. Data from these two widely separated areas of the deep ocean provide compelling evidence that changes in climate can readily influence deep-sea processes. However, the limited geographic coverage of these existing time-series studies stresses the importance of developing a more global effort to monitor deep-sea ecosystems under modern conditions of rapidly changing climate.Keywords
This publication has 67 references indexed in Scilit:
- Long-term changes in deep-water fish populations in the northeast Atlantic: a deeper reaching effect of fisheries?Proceedings Of The Royal Society B-Biological Sciences, 2009
- Connections between climate, food limitation, and carbon cycling in abyssal sediment communitiesProceedings of the National Academy of Sciences of the United States of America, 2008
- Climate-induced interannual variability of marine primary and export production in three global coupled climate carbon cycle modelsBiogeosciences (online), 2008
- Influence of ocean winds on the pelagic ecosystem in upwelling regionsProceedings of the National Academy of Sciences of the United States of America, 2008
- Two abyssal sites in the Southern Ocean influenced by different organic matter inputs: Environmental characterization and preliminary observations on the benthic foraminiferaDeep Sea Research Part II: Topical Studies in Oceanography, 2007
- Climate effect on food supply to depths greater than 4,000 meters in the northeast PacificLimnology and Oceanography, 2006
- Phytodetritus entering the benthic boundary layer and aggregated on the sea floor in the abyssal NE Pacific: macro- and microscopic compositionDeep Sea Research Part II: Topical Studies in Oceanography, 1998
- Sediment community response to a temporally varying food supply at an abyssal station in the NE pacificDeep Sea Research Part II: Topical Studies in Oceanography, 1998
- Particulate matter fluxes into the benthic boundary layer at a long time-series station in the abyssal NE Pacific: composition and fluxesDeep Sea Research Part II: Topical Studies in Oceanography, 1998
- Benthic response to the sedimentation of particulate organic matter at the BIOTRANS station, 47°N, 20°WDeep Sea Research Part II: Topical Studies in Oceanography, 1993