Microbes aside, upward of nine in 10 species crowd into the 30% of Earth's surface that's dry. It wasn't always that way, say a pair of researchers at the University of California (UC), Davis, who have been studying land and ocean features to understand how evolution proceeds in these two realms.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/rarity-and-richness
[2] http://admin.indiaenvironmentportal.org.in/category/author/elizabeth-pennisi
[3] http://admin.indiaenvironmentportal.org.in/category/journal/science
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-ecosystems
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-life
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/oceans-and-seas
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/biodiversity