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Régulation des communautés algales par les macro-herbivores dans les communautés récifales des Antilles Françaises : (Guadeloupe,Martinique, Saint Barthélémy
| Content Provider | Semantic Scholar |
|---|---|
| Author | Brugneaux, Sophie J. |
| Copyright Year | 2012 |
| Abstract | A study of factors influencing the composition and spatlal distrisbution of algal abundance in the french caribbean reef communitie,s and more specifically in guadeloupe was conducted. The role of diadema sea urchins was particulary studied. For that, 22 stations in the friench antilles were selected and several indicators tested. After a description of each biotlc compartment (algae, herbivore, predators), a search for factors influencing the characteristics of the algal compartment was conducted at three spatial scale, using non-parametric statistical analyses, including canonical correspondence analyses (cca) and redundancy analyses (rda). Then a search for the factors influencing the distribution of dladema sea urchins was also conducted. If the two guilds of herbivores (diadema sea urchln and fish) have a significant impact on the abundance of algalturf, only herbivorous fish was found to have an influence in the reefs of guadeloupe and that influence was not observed on other algal groups, including phaeophyceae. At the scale of all the islands, the analyses did not enable to show the influence of herbivores in the regulation of algal abundance. The density of sea urchins was found to be low in the studied sites. Several factors likely to influence their distribution in size and their abundance were identified |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.theses.fr/2012AGUY0522/document |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
