Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6359269 | Marine Pollution Bulletin | 2013 | 8 Pages |
Abstract
In Brazil, where reefs occur in markedly turbid environments, the relationship between sedimentation/organic matter and corals is poorly known. Thus, the ex situ effects of sediment with and without organic matter over the ÎF/Fm and physical state of Mussismilia braziliensis were analyzed. The ÎF/Fm and coral physical state, evaluated through the susceptibility index to sedimentation (SI), were measured in seven colonies exposed to sedimentation (0-450 mg cmâ2 dayâ1) free of organic matter after 45 days of exposure, and in 12 colonies exposed to sedimentation (0-500 mg cmâ2 dayâ1) with organic matter content (10%), in which case ÎF/Fm was measured after 72 h and SI after 120 h. In both cases there were effects of increasing sedimentation on the SI with no effect on ÎF/Fm. Despite the tolerance to high sedimentation rates shown by this coral, we noted that the presence of organic matter might reduce its tolerance to sedimentation stress.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Oceanography
Authors
Miguel Loiola, MarÃlia D.M. Oliveira, Ruy K.P. Kikuchi,