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Effects of coral transplantation in sites of varying distances and environmental conditions
In: Marine Biology: International Journal on Life in Oceans and Coastal Waters. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793
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| Abstract |
Several scleractinian coral species with different growth forms and life history strategies were studied in terms of colony growth (expressed as projected linear increment) and survivorship over a range of distances and environmental conditions in the Philippines. The experimental design consisted of 1 m2 plots grouped within a reef site, to several sites within reef systems separated by a distance of about 340 km. There were distinct differences among species, with submassive and massive forms displaying slower growth but better survival, confirming results of other studies. They probably play the role of framework builders of the reef. In contrast, the delicate branching and foliose species had higher growth rates but poor survivorship. This observation, plus their ease of fragmentation, suggests they act more as fillers of the reef matrix. There was high variability in colony increment of a species among the square meter plots, but not among sites within a reef system. Thus, more regular pattern could be observed at this level. In contrast to growth, survivorship differed significantly among sites, being lowest in the site which harbored the greatest amount of dead coral. Growth and survival, however, are not sufficient performance measures to evaluate the success of coral transplantation. Reproduction and subsequent recruitment must also be taken into account. It is recommended that coral transplant and restoration studies consider the broad environmental context of restoration and seek to develop assembly rules that will allow practitioners to match coral types and sequence of interventions to each unique context. |
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