Please use this identifier to cite or link to this item:
Authors: Bianchi, D.* 
Zavatarelli, M.* 
Pinardi, N.* 
Capozzi, R.* 
Capotondi, L.* 
Corselli, C.* 
Masina, S.* 
Title: Simulations of ecosystem response during the sapropel S1 deposition event
Issue Date: 2006
Series/Report no.: / 235 (2006)
DOI: 10.1016/j.palaeo.2005.09.032
Keywords: Sapropel;
Marine ecology;
Mediterranean Sea;
Ecological modelling
Subject Classification03. Hydrosphere::03.01. General::03.01.06. Paleoceanography and paleoclimatology 
03. Hydrosphere::03.04. Chemical and biological::03.04.01. Biogeochemical cycles 
Abstract: A one-dimensional ecosystem numerical model is used to simulate the ecosystem changes that could have occurred in the open ocean areas of the Eastern Mediterranean Sea during the Climatic Optimum interval (9500–6000 B.P., Mercone et al. [Mercone, D., Thomson, J., Croudace, I.W., Siani, G., Paterne, M., Troelstra, S., 2000. Duration of S1, the most recent sapropel in the eastern Mediterranean Sea, as indicated by accelerator mass spectrometry radiocarbon and geochemical evidence. Paleoceanography 15, 336–347]). In this period the S1 sapropel was deposited. S1 is the most recent sapropel in the succession of organic carbon-rich layers intercalated in normal Neogene sedimentary sequences. Different theories have been invoked in order to explain the deposition of this peculiar layer. Our simulations seem to indicate that the modified thermohaline circulation, supplying oxygen only in the first 500 m of the water column, is responsible for the sapropel deposition when higher productivity is allowed in the euphotic zone. The model shows the importance in this process of bacteria that consume oxygen by decomposing the Particulate Organic Matter (POM) produced in the upper water column. The sinking velocity of POM partially regulates the timescale of the occurrence of anoxia at the bottom and in the whole water column, allowing the relatively rapid onset of sapropel deposition.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
1138.pdf1.15 MBAdobe PDFView/Open
Show full item record

Page view(s)

Last Week
Last month
checked on Aug 13, 2018


checked on Aug 13, 2018

Google ScholarTM