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Title: Mesopelagic zone ecology and biogeochemistry - A synthesis
Authors: Robinson, Carol
Steinberg, Deborah K.
Anderson, Thomas R.
Arístegui, Javier 
Carlson, Craig A.
Frost, Jessica R.
Ghiglione, Jean François
Hernández-León, Santiago 
Jackson, George A.
Koppelmann, Rolf
Quéguiner, Bernard
Ragueneau, Olivier
Rassoulzadegan, Fereidoun
Robison, Bruce H.
Tamburini, Christian
Tanaka, Tsuneo
Wishner, Karen F.
Zhang, Jing
UNESCO Clasification: 251001 Oceanografía biológica
Keywords: Mesopelagic zone
Marine ecology
Twilight zone
Issue Date: 2010
Publisher: 0967-0645
Journal: Deep-Sea Research Part II: Topical Studies in Oceanography 
Abstract: The mesopelagic zone is the oceanic region through which carbon and other elements must pass in order to reach deeper waters or the sea floor. However, the food web interactions that occur in the mesopelagic zone are difficult to measure and so, despite their crucial importance to global elemental cycles, are not very well known. Recent developments in technology and new approaches have advanced the study of the variability in and controls upon the distribution and diversity of organisms in the mesopelagic zone, including the roles of respiration, recycling, and repackaging of particulate and dissolved organic material. However, there are remarkably few syntheses of the ecology and biogeochemistry of the microbes and metazoa that permanently reside or habitually visit this ‘twilight zone’. Without this synthesis, it is difficult to assess the impact of ongoing changes in ocean hydrography and chemistry, due to increasing atmospheric carbon dioxide levels, on the biological carbon pump. This paper reviews what is known about the distribution of microbes and metazoa in the mesopelagic zone in relation to their activity and impact on global biogeochemical cycles. Thus, gaps in our knowledge are identified and suggestions made for priority research programmes that will improve our ability to predict the effects of climate change on carbon sequestration.
ISSN: 0967-0645
DOI: 10.1016/j.dsr2.2010.02.018
Source: Deep-Sea Research Part II: Topical Studies in Oceanography [ISSN 0967-0645], v. 57, p. 1504-1518
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