About the same amount of atmospheric carbon that goes into creating plants on land goes into the bodies of tiny marine plants known as plankton.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/marine-carbon-sinking-rates-confirm-importance-polar-oceans
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/environment-news-network
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-resources
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/oceans-and-seas
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-sinks
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-ecosystems
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change