Ecological assemblages of platy corals occurthrough most of the geological record of the Scleractinia(late Triassic to Recent) but they have received almost nodetailed attention. Recent studies have suggested that theyrepresent a photoadaptive response by photosymbioticcorals to reduced illumination in deeper and/or moreturbid waters. As an informal working group, we haveaimed to establish (1) if this model applies more generallyto the geological record, and (2) if so, what implicationsthis may have for long-term stability of tropical marineecosystems (e.g. role of photosymbiosis). Here we discusspreliminary results compiled from our own independentprojects in 32 study areas ranging from late Jurassic tomid Miocene age. We set out simple descriptive conceptsof platy corals and platy coral assemblages and provideother palaeoecological and geological information thatcharacterises these assemblages. Sedimentological andpalaeoecological evidence supports the photoadaptivenature of platy coral assemblages ('euphotic floor model'),and indicates their ecological functional stability since thelate Triassic. We recognise seven variants of suchassemblages according to the role of turbidity in differentspatiotemporal settings. Preliminary work so far has failedto reveal closely comparable modern analogues.
Platy coral assemblages: 200 million years of functional stability in response to the limiting effects of light and turbidity / Rosen, B. R.; Aillud, G. S.; Bosellini, Francesca; Clack, N. J.; Insalaco, E.; Valldeperas, F. X.; Wilson, M. E. J.. - STAMPA. - 1:(2002), pp. 255-264. (Intervento presentato al convegno 9th International Coral Reef Symposium tenutosi a Bali nel Bali, 23-27 October 2000).
Platy coral assemblages: 200 million years of functional stability in response to the limiting effects of light and turbidity.
BOSELLINI, Francesca;
2002
Abstract
Ecological assemblages of platy corals occurthrough most of the geological record of the Scleractinia(late Triassic to Recent) but they have received almost nodetailed attention. Recent studies have suggested that theyrepresent a photoadaptive response by photosymbioticcorals to reduced illumination in deeper and/or moreturbid waters. As an informal working group, we haveaimed to establish (1) if this model applies more generallyto the geological record, and (2) if so, what implicationsthis may have for long-term stability of tropical marineecosystems (e.g. role of photosymbiosis). Here we discusspreliminary results compiled from our own independentprojects in 32 study areas ranging from late Jurassic tomid Miocene age. We set out simple descriptive conceptsof platy corals and platy coral assemblages and provideother palaeoecological and geological information thatcharacterises these assemblages. Sedimentological andpalaeoecological evidence supports the photoadaptivenature of platy coral assemblages ('euphotic floor model'),and indicates their ecological functional stability since thelate Triassic. We recognise seven variants of suchassemblages according to the role of turbidity in differentspatiotemporal settings. Preliminary work so far has failedto reveal closely comparable modern analogues.Pubblicazioni consigliate
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