Severity of the 1998 and 2005 bleaching events in Venezuela, southern Caribbean
This study describes the severity of the 2005 bleaching event at 15 reef sites across Venezuela and compares the 1998 and 2005 bleaching events at one of them. During August and September 2005, bleached corals were first observed on oceanic reefs rather than coastal reefs, affecting 1 to 4% of coral...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Vicerractoría Investigación
2010-10-01
|
| Series: | Revista de Biología Tropical |
| Subjects: | |
| Online Access: | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442010000700017 |
| _version_ | 1797765224584970240 |
|---|---|
| author | Sebastián Rodríguez Aldo Cróquer David Bone Carolina Bastidas |
| author_facet | Sebastián Rodríguez Aldo Cróquer David Bone Carolina Bastidas |
| author_sort | Sebastián Rodríguez |
| collection | DOAJ |
| description | This study describes the severity of the 2005 bleaching event at 15 reef sites across Venezuela and compares the 1998 and 2005 bleaching events at one of them. During August and September 2005, bleached corals were first observed on oceanic reefs rather than coastal reefs, affecting 1 to 4% of coral colonies in the community (3 reef sites, n=736 colonies). At that time, however, no bleached corals were recorded along the eastern coast of Venezuela, an area of seasonal upwelling (3 reefs, n=181 colonies). On coastal reefs, bleaching started in October but highest levels were reached in November 2005 and January 2006, when 16% of corals were affected among a wide range of taxa (e.g. scleractinians, octocorals, Millepora and zoanthids). In the Acropora habitats of Los Roques (an oceanic reef), no bleached was recorded in 2005 (four sites, n=643 colonies). At Cayo Sombrero, a coastal reef site, bleaching was less severe in 1998 than in 2005 (9% of the coral colonies involving 2 species vs. 26% involving 23 species, respectively). Our results indicate that bleaching was more severe in 2005 than in 1998 on Venezuelan reefs; however, no mass mortality was observed in either of these two events. Rev. Biol. Trop. 58 (Suppl. 3): 189-196. Epub 2010 October 01.<br>En este estudio se describe la severidad del evento de blanqueamiento del 2005 en 15 arrecifes coralinos de Venezuela, y se compara con el ocurrido en 1998 para uno de esos arrecifes. Los primeros corales blanqueados se observaron en agosto y septiembre 2005, en arrecifes oceánicos en lugar de costeros, afectando entre 1 y 4% de las colonias coralinas (3 arrecifes, n= 736 colonias). Para ese momento, tampoco se había detectado blanqueamiento en áreas oceánicas de la costa este de Venezuela (3 arrecifes, n= 181 colonias), donde ocurre una surgencia estacional. En arrecifes costeros, el blanqueamiento comenzó en octubre pero alcanzó su máximo entre noviembre 2005 y enero 2006, afectando hasta el 16% de los organismos de una variedad de taxa (e.g. escleractinios, octocorales, Millepora, zoántidos). En los hábitats de Acropora de Los Roques, no se observó blanqueamiento en el 2005 (4 sitios oceánicos, n= 643 colonias). En Cayo Sombrero, un arrecife costero, el blanqueamiento fue menos severo en 1998 comparado con el de 2005 (9% de colonias coralinas de 2 especies vs. 26% de colonias de 23 especies, respectivamente).Estos resultados indican que el blanqueamiento del 2005 fue más severo que el de 1998 en los arrecifes de Venezuela, sin embargo, no ocurrió mortalidad masiva asociada a ninguno de los dos eventos. |
| first_indexed | 2024-03-12T20:07:04Z |
| format | Article |
| id | doaj.art-c11adc29a47c48d6aaa47222619e66d9 |
| institution | Directory Open Access Journal |
| issn | 0034-7744 2215-2075 |
| language | English |
| last_indexed | 2024-03-12T20:07:04Z |
| publishDate | 2010-10-01 |
| publisher | Vicerractoría Investigación |
| record_format | Article |
| series | Revista de Biología Tropical |
| spelling | doaj.art-c11adc29a47c48d6aaa47222619e66d92023-08-02T02:02:09ZengVicerractoría InvestigaciónRevista de Biología Tropical0034-77442215-20752010-10-0158189196Severity of the 1998 and 2005 bleaching events in Venezuela, southern CaribbeanSebastián RodríguezAldo CróquerDavid BoneCarolina BastidasThis study describes the severity of the 2005 bleaching event at 15 reef sites across Venezuela and compares the 1998 and 2005 bleaching events at one of them. During August and September 2005, bleached corals were first observed on oceanic reefs rather than coastal reefs, affecting 1 to 4% of coral colonies in the community (3 reef sites, n=736 colonies). At that time, however, no bleached corals were recorded along the eastern coast of Venezuela, an area of seasonal upwelling (3 reefs, n=181 colonies). On coastal reefs, bleaching started in October but highest levels were reached in November 2005 and January 2006, when 16% of corals were affected among a wide range of taxa (e.g. scleractinians, octocorals, Millepora and zoanthids). In the Acropora habitats of Los Roques (an oceanic reef), no bleached was recorded in 2005 (four sites, n=643 colonies). At Cayo Sombrero, a coastal reef site, bleaching was less severe in 1998 than in 2005 (9% of the coral colonies involving 2 species vs. 26% involving 23 species, respectively). Our results indicate that bleaching was more severe in 2005 than in 1998 on Venezuelan reefs; however, no mass mortality was observed in either of these two events. Rev. Biol. Trop. 58 (Suppl. 3): 189-196. Epub 2010 October 01.<br>En este estudio se describe la severidad del evento de blanqueamiento del 2005 en 15 arrecifes coralinos de Venezuela, y se compara con el ocurrido en 1998 para uno de esos arrecifes. Los primeros corales blanqueados se observaron en agosto y septiembre 2005, en arrecifes oceánicos en lugar de costeros, afectando entre 1 y 4% de las colonias coralinas (3 arrecifes, n= 736 colonias). Para ese momento, tampoco se había detectado blanqueamiento en áreas oceánicas de la costa este de Venezuela (3 arrecifes, n= 181 colonias), donde ocurre una surgencia estacional. En arrecifes costeros, el blanqueamiento comenzó en octubre pero alcanzó su máximo entre noviembre 2005 y enero 2006, afectando hasta el 16% de los organismos de una variedad de taxa (e.g. escleractinios, octocorales, Millepora, zoántidos). En los hábitats de Acropora de Los Roques, no se observó blanqueamiento en el 2005 (4 sitios oceánicos, n= 643 colonias). En Cayo Sombrero, un arrecife costero, el blanqueamiento fue menos severo en 1998 comparado con el de 2005 (9% de colonias coralinas de 2 especies vs. 26% de colonias de 23 especies, respectivamente).Estos resultados indican que el blanqueamiento del 2005 fue más severo que el de 1998 en los arrecifes de Venezuela, sin embargo, no ocurrió mortalidad masiva asociada a ninguno de los dos eventos.http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442010000700017blanqueamientoarrecifescambios comunitarioscalentamiento globalcoral reefsstressglobal warmingbleaching |
| spellingShingle | Sebastián Rodríguez Aldo Cróquer David Bone Carolina Bastidas Severity of the 1998 and 2005 bleaching events in Venezuela, southern Caribbean Revista de Biología Tropical blanqueamiento arrecifes cambios comunitarios calentamiento global coral reefs stress global warming bleaching |
| title | Severity of the 1998 and 2005 bleaching events in Venezuela, southern Caribbean |
| title_full | Severity of the 1998 and 2005 bleaching events in Venezuela, southern Caribbean |
| title_fullStr | Severity of the 1998 and 2005 bleaching events in Venezuela, southern Caribbean |
| title_full_unstemmed | Severity of the 1998 and 2005 bleaching events in Venezuela, southern Caribbean |
| title_short | Severity of the 1998 and 2005 bleaching events in Venezuela, southern Caribbean |
| title_sort | severity of the 1998 and 2005 bleaching events in venezuela southern caribbean |
| topic | blanqueamiento arrecifes cambios comunitarios calentamiento global coral reefs stress global warming bleaching |
| url | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442010000700017 |
| work_keys_str_mv | AT sebastianrodriguez severityofthe1998and2005bleachingeventsinvenezuelasoutherncaribbean AT aldocroquer severityofthe1998and2005bleachingeventsinvenezuelasoutherncaribbean AT davidbone severityofthe1998and2005bleachingeventsinvenezuelasoutherncaribbean AT carolinabastidas severityofthe1998and2005bleachingeventsinvenezuelasoutherncaribbean |