Sea urchin bioerosion on coral reefs: place in the carbonate budget and relevant variables
نویسندگان
چکیده
منابع مشابه
Changing dynamics of Caribbean reef carbonate budgets: emergence of reef bioeroders as critical controls on present and future reef growth potential.
Coral cover has declined rapidly on Caribbean reefs since the early 1980s, reducing carbonate production and reef growth. Using a cross-regional dataset, we show that widespread reductions in bioerosion rates-a key carbonate cycling process-have accompanied carbonate production declines. Bioerosion by parrotfish, urchins, endolithic sponges and microendoliths collectively averages 2 G (where G ...
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Mexican Pacific sea urchin studies have been focused mainly on species distribution, ecology and fisheries. Reef degradation by sea urchin bioerosion has not been studied previously en these reefs. We investigate the importance of Diadema mexicanum as a bioerosive agent of coral carbonate at Bahias de Huatulco, and the relative magnitude of coral accretion and bioerosion. At each of five locali...
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C reefs are often referred to as the rainforests of the sea, although, as Davidson (1) points out, one could equally well call rainforests the coral reefs of the land. Regardless, these two ecosystems do indeed share several important attributes, most notably high diversity and severe declines worldwide over the last several decades. There are many differences, however, between reefs and rainfo...
متن کاملPhase-Shift Dynamics of Sea Urchin Overgrazing on Nutrified Reefs
Shifts from productive kelp beds to impoverished sea urchin barrens occur globally and represent a wholesale change to the ecology of sub-tidal temperate reefs. Although the theory of shifts between alternative stable states is well advanced, there are few field studies detailing the dynamics of these kinds of transitions. In this study, sea urchin herbivory (a 'top-down' driver of ecosystems) ...
متن کاملChemical and mechanical bioerosion of boring sponges from Mexican Pacific coral reefs.
Species richness (S) and frequency of invasion (IF) by boring sponges on living colonies of Pocillopora spp. from National Park Isla Isabel (México, East Pacific Ocean) are presented. Twelve species belonging to the genera Aka, Cliona, Pione, Thoosa and Spheciospongia were found, and 56% of coral colonies were invaded by boring sponges, with Cliona vermifera Hancock 1867 being the most abundant...
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ژورنال
عنوان ژورنال: Coral Reefs
سال: 1994
ISSN: 0722-4028,1432-0975
DOI: 10.1007/bf00300768