A high resolution historical record of Holocene anoxygenic primary production in the Black Sea

Details A high resolution historical record of Holocene anoxygenic primary production in the Black Sea A high resolution historical record of Holocene anoxygenic primary production in the Black Sea

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57.4337r&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 57, Issue 17, pp.4337-4342

Physics

7

Scientific paper

I reconstruct the historical record of anoxygenic primary production in the Black Sea over the last 8200 years by an analysis of Chlorobium carotenoids in sediments. Anoxygenic photosynthesis in the Black Sea occurs only when hydrogen sulfide-containing deep water penetrates the euphotic zone. The data show that the Black Sea has experienced large fluctuations in the extent of anoxygenic primary production and therefore the depth of the H 2 S chemocline throughout much of the Holocene. Changes in the depth of the H 2 S chemocline also shift the dominant phytoplankton populations in the water column to noncarbonate-bearing species and result in the formation of intense dark bands in sediments.

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