ecologist jeremy jackson is one of a group of scientists working there hired to study the ecological effects of the spill. dr. jackson: we worked all the way down the coast for something like 50, 60 miles to get to places that were less and less affected by the spill. and so we had what were in effect control reefs that were along the coast, and we were monitoring the condition on the coral reefs and the mangroves and everything here and then further and further and further away from where the spill was. narrator: the results of the study were not surprising. the area affected by the spill was severely damaged compared to the unaffected, or control, areas. but for jackson, it was the findings made in the control areas after the initial study that would be much more alarming. dr. jackson: two years later, almost all the corals died in the control areas, and they died for reasons that had nothing to do with the oil spill. they died because of disease, because of overgrowth by seaweeds. they died because of bleaching. and so that was, i suppose for me, the real wake-up call that there's

ecologist jeremy jackson is one of a group of scientists working there hired to study the ecological the spill was severely damaged compared to the unaffected, or control, areas. but for jackson, it was the findings made in the control areas after the initial study that would be much more alarming. dr. jackson: two years later, almost all the corals died in the control areas, and they died for reasons that had nothing to do with the oil spill. they died because of disease, because of overgrowth by seaweeds. they died because of bleaching. and so that was, i suppose for me, the real wake-up call that there's nothing close to natural out there anymore and that it was just fundamentally important and interesting to try and understand all these different dimensions of degradation. so what i'm really interested in is how have people changed the ocean? what does it mean not just for the natural world but for us? and what will it provide for us in the future? narrator: to understand the statof the oceans today, jackson uses data from fish surveys conducted worldwide, along with catch record

jeremy. thanks for getting "up." tomorrow, it has been over a century and a half since the wind party took america by storm and gave andrew jackson this week, when a man calling himself a wig won an election. who he is, how he won. is he still furious with andrew jackson? we'll introduce you to him and talk to america's only wig elected official tomorrow. next, melissa harris-perry. see you tomorrow at 8:00. thanks for getting "up." reluctant to try new things. really? what's wrong with trying new things? look! mommy's new vacuum! (cat screech) you feel that in your muscles? i do... drink water. it's a long story. well, not having branches let's us give you great rates and service. i'd like that. a new way to bank. a better way to save. ally bank. your money needs an ally. a man who doesn't stand still. but jim has afib, atrial fibrillation -- an irregular heartbeat, not caused by a heart valve problem. that puts jim at a greater risk of stroke. for years, jim's medicine tied him to a monthly trip to the clinic to get his blood tested. but now, with once-a-day xarelto®, jim's on the move. jim's doctor recommended xarelto®. like w