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Titolo:
Changes in reef community structure after fifteen years of natural disturbances in the Eastern Pacific (Costa Rica)
Autore:
Guzman, HM; Cortes, J;
Indirizzi:
Smithsonian Trop Res Inst, Balboa, Ancon, Panama Smithsonian Trop Res Inst Balboa Ancon Panama nst, Balboa, Ancon, Panama Univ Costa Rica, CIMAR, San Jose 2060, Costa Rica Univ Costa Rica San Jose Costa Rica 2060 IMAR, San Jose 2060, Costa Rica Univ Costa Rica, Escuela Biol, San Jose 2060, Costa Rica Univ Costa Rica San Jose Costa Rica 2060 Biol, San Jose 2060, Costa Rica
Titolo Testata:
BULLETIN OF MARINE SCIENCE
fascicolo: 1, volume: 69, anno: 2001,
pagine: 133 - 149
SICI:
0007-4977(200107)69:1<133:CIRCSA>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
GALAPAGOS-ISLANDS ECUADOR; GREAT-BARRIER-REEF; CORAL-REEFS; EL-NINO; ACANTHASTER-PLANCI; TROPICAL PACIFIC; PANAMA; REPRODUCTION; MORTALITY; RECOVERY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
61
Recensione:
Indirizzi per estratti:
Indirizzo: Guzman, HM Smithsonian Trop Res Inst, Unit 0948, APO, AA 34002 USA Smithsonian Trop Res Inst APO AA USA 34002 , APO, AA 34002 USA
Citazione:
H.M. Guzman e J. Cortes, "Changes in reef community structure after fifteen years of natural disturbances in the Eastern Pacific (Costa Rica)", B MARIN SCI, 69(1), 2001, pp. 133-149

Abstract

Eastern Pacific coral reefs have been severely disturbed by natural eventsduring the past two decades. We have monitored changes in reef structure and reef recovery after ENSO 1982-83 (starting in 1984), at sixteen permanent plots in four different habitats at Ca (n) over tildeo Island, Costa Rica. Reefs were also severely affected by dinoflagellate blooms in 1985, and by warming events in 1987, 1990-95 and 1997-98. The 1982-83 event caused approximately 100% coral mortality in shallow reef zones at Ca (n) over tildeoIsland, particularly of pocilloporid species. Coral recruitment may have coincided with putative larval pulses during the various ENSO events or shortly after, as deduced by the presence of sexual recruits during 1987-88 andwidespread sexual recruitment in 1993-94. Mortality of juvenile and adult colonies during the 1997-98 ENSO warming was low (5%), suggesting that populations of massive and branching corals may have been more tolerant of elevated thermal stress than during previous events. Supporting this notion arethe Reynolds SST comparative plots for 1982-83 and 1997-98, which indicatesimilar warming trends and temperature maxima at this locality. Reefs at Ca (n) over tildeo Island are recovering, with significant increases in the number of now sexual recruits. Although 1984 levels of coral cover have notyet been attained island-wide, 70% cover occurs in reef areas on the northside of the island. Other disturbances, such as phytoplankton blooms that affected Pocillopora spp. in all habitats, may have retarded reef regeneration, complicating the course of recovery after the 1982-83 ENSO warming disturbance.

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Documento generato il 04/07/20 alle ore 17:40:03