Some ecosystems bounced back after the 1979 Ixtoc I oil spill, but research quickly withered.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/lost-legacy-last-great-oil-spill
[2] http://admin.indiaenvironmentportal.org.in/category/author/mark-schrope
[3] http://admin.indiaenvironmentportal.org.in/category/journal/nature
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/oil-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-ecosystems
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/gulf-mexico
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-fisheries
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mexico
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-pollution