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| Registros recuperados: 41 | |
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| Gil-Agudelo, D.L.; Navas-Camacho, R.; Rodríguez-Ramírez, A.; Reyes-Nivia, M.C.; Bejarano, S.; Garzón-Ferreira, J.; Smith, G.W.. |
| Los arrecifes coralinos, uno de los más bellos e importantes ecosistemas de nuestro planeta, han existido por más de 200 millones de años, sobreviviendo a grandes cambios durante su historia (glaciaciones, extinciones masivas, entre otros). Sin embargo, durante las últimas tres décadas se han registrado grandes y súbitos cambios en el medio marino que a juicio de algunos investigadores ponen en peligro la supervivencia de corales y arrecifes coralinos. Uno de los mayores problemas que enfrentan los arrecifes coralinos hoy en día es la aparición de enfermedades que atacan a los corales, la base de estos ecosistemas. No existe un concenso sobre si estas enfermedades son realmente nuevas o no, pero lo que sí se sabe es que algunas de ellas están creando... |
| Tipo: Journal Contribution |
Palavras-chave: Coral reefs; Mortality; Coral reefs; Mortality; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_4945. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/3616 |
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| Santodomingo, N.; Rodríguez-Ramírez, A.; Garzón-Ferreira, J.. |
| The pomacentrid Stegastes planifrons is one of the most conspicuous inhabitants of the coral reefs and constitutes an important agent of natural coral mortality. These fishes kill coral directly by removing coral polyps for opening up a space for its algal turfs, which are their main food. The population density, territory and algal turfs areas of Stegastes planifrons were assessed at Chengue and Gayraca bays in Tayrona Natural Park, as a contribution to understand natural processes involved in the coral reef deterioration. During August to November 1999, belt transects (20 x 2 m) were evaluated at four reef habitat types: multispecific coral assemblages dominated by (1) Colpophyllia natans (COLP) or (2) Montastraea spp. (MONT); and monospecific coral... |
| Tipo: Journal Contribution |
Palavras-chave: Territoriality; Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/3125 |
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| Ammar, M.S.A.; Ghobashi, A.A.; Omran, M.A.; Shaaban, A.M.. |
| Using Using SCUBA diving, surveying the coral reef communities at four sites, Red Sea Egypt was done. These sites are: Ras El Behar (polluted by petroleum oil), El-Hamraween (impacted by phosphate shipping), Shabrour Umm Gam’ar (harmed by recreational activities and has been suffering from the outbreak of Acanthaster planci during 1998) and Kalawy (a control site). The skeletal growth of the coral Stylophora pistillata was promoted greatly at the expense of other corals, in presence of chronic oil pollution (Ras El-Behar). In contrast, this species was completely suppressed in presence of phosphate and sulphur enrichment. Petroleum oil led to coral scarcity, space monopolization by one coral and increased sea urchins and algae. Coral reefs enriched with... |
| Tipo: Journal Contribution |
Palavras-chave: Field Study; Coral reefs; Hydrocarbons; Phosphates; Coral reefs; Hydrocarbons; Phosphates; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_3719; Http://aims.fao.org/aos/agrovoc/c_35986. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/1909 |
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| Busutil, L.; Hansel Caballero, H.; Hidalgo, G.; Alcolado-Prieto, P.; Alcolado, P. M.. |
| Se determinó la condición del bentos de los arrecifes coralinos del polo turístico Santa Lucía (nordeste de Cuba) antes y después del paso del Huracán Ike, a partir de indicadores biológicos de la metodología AGRRA. Se evidenció un gran deterioro de la cresta arrecifal desde el primer muestreo. El arrecife frontal presentó mejores condiciones que la cresta, fundamentalmente hacia el este y hacia las mayores profundidades. Los valores bajos de la densidad de corales, la cobertura viva de coral y del reclutamiento de corales, así como la gran cobertura de macroalgas fueron las variables más críticas. La incidencia de enfermedades microbianas y de blanqueamiento de corales fue baja. Las causas más importantes de afectación al arrecife coralino muestran... |
| Tipo: Journal Contribution |
Palavras-chave: Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4049 |
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| Reyes Nivia, M. C.; Rodríguez Ramírez, A.; Garzón Ferreira, J.. |
| Five coral reef areas at the Colombian Caribbean were assessed between 1998 and 2003 through the “National Coral Reef Monitoring System of Colombia” (SIMAC), recording 198 species of fishes. The highest species number was observed in Chengue bay (149), including four new records for the Santa Marta area. At San Andrés Island, 138 species were identified, with nine new records for the Archipelago. At the Rosario Island, 128 species were recorded with eight new records, while 114 species and 12 new records were observed at San Bernardo Islands. Of the 119 fish species recorded at the Urabá area, 48 are reported for the first time. |
| Tipo: Journal Contribution |
Palavras-chave: Reef fish; Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/3061 |
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| Caballero, H.; Alcolado, P.M.; Semidey, A.. |
| Coral reef condition north of the Havanan provinces (NW Cuba), an area with variable influence from human settlements and runoff, was assessed using the AGRRA methodology’s benthic biological indicators: live coral cover, coral density, maximum colony diameter, old and recent coral mortality, coral recruitment, Diadema antillarum density, and macroalgae cover. Coral communities at 11 reef crest and 22 forereef sites were sampled during 2004. The Shannon heterogenety and Pielou evenness indices were calculated. A total of 33 species of coral, larger than 10 cm in maximum diameter, were identified. The biological indicators analyzed showed significant differences among sites, which suggest a marked heterogeneity in environmental conditions along the study... |
| Tipo: Journal Contribution |
Palavras-chave: Species diversity; Abundance; Coral reefs; Coral reefs; Species diversity; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_33954. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/3521 |
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| Caballero, H.; Busutil, L.; García, Y.; Alcolado, P.M.. |
| The sponge communities at four locations on the east coast of Bahía de Cochinos were surveyed in October 2002. At each location, sampling sites were established in the ecological zones of patch reef (3 m), shallow terrace (6-10 m), and deep terrace (15 m). The line-transect method with a 10 m line as sampling unit was used to measure sponge bottom coverage, and a 1 m square grid was used to quantify sponge community density. Species heterogeneity and species richness indices showed variability among sites and tended to increase with depth. Thirty species belonging to 19 families and 21 genera were found. The most common species were: Mycale laevis, Aplysina cauliformis, Cliona aprica, Aplysina fistularis, and Ectyoplasia ferox, which comprised 48% of the... |
| Tipo: Journal Contribution |
Palavras-chave: Sponges; Aquatic communities; Coral reefs; Aquatic communities; Coral reefs; Sponges; Http://aims.fao.org/aos/agrovoc/c_553; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/3523 |
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| Miravet, M.E.; Enríquez, D.; Lugioyo, G.M.; Delgado, Y.; Núñez, R.; Cabrera, H.; Martí, J.. |
| Se registran por primera vez para los arrecifes de la plataforma SW cubana, la presencia de 5 géneros y 16 especies de bacterias heterótrofas aeróbicas y 15 géneros de hongos, de los cuales, 7 se identificaron hasta especie. Los géneros Bacillus sp. (bacteria) y Aspergillus sp. (hongo) resultaron los más cosmopolitas de todos los géneros encontrados, predominando en las aguas y sedimentos de todos los arrecifes estudiados. Del total de cepas aisladas la mayor diversidad de géneros, tanto de bacterias heterótrofas aeróbicas como de hongos, correspondió a muestras procedentes del arrecife Juan García. |
| Tipo: Journal Contribution |
Palavras-chave: New records; Species diversity; Coral reefs; Bacteria; Coral reefs; Species diversity; Bacteria; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_765. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/3331 |
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| Awosika, L.F.. |
| The continental shelf east and west of Lagos [long.2o.04.00E to long.4o 00’.00”E] is narrow shelf ranging in width between 25 to 30 kilometers. Echograms from several NIOMR’s cruises reveal the presence of some isolated and in some cases continuous bands of dead Holocene coral banks, within the middle to outer continental shelf [40-120m depth]. The most prominent of these structures are ones occurring between 75-100m of water and running almost parallel to the coastline. The dead coral structures are non-reef forms. They are found either as continuous Bands of rough bottom with width ranging between, 100 to 3,500m or in isolated pinnacled shapes. The pinnacled forms reach heights of over 7 meters in some cases. These coral structures pose obstructions to... |
| Tipo: Report |
Palavras-chave: Coral reefs; Continental shelves; Coral reefs; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_32413. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/2381 |
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| Glynn, P.W.; Prahl, H. von; Guhl, F.. |
| Este estudio presenta un breve resumen de la estructura y distribución de los arrecifes coralinos de la Isla de Gorgona. Se investigaron los organismos coralivoros, comparándolos con los de otras localidades del Pacifico Americano; de esta forma se establece un criterio, para conocer las diferencias regionales y las interacciones bióticas sobre las diferentes comunidades coralinas. La Isla de Gorgona se localiza hacia el excremo sur de la provincia de Panamá panamá Bight), distante unos 30 km de la franja costera aluvial, lo que la aleja considerablemente del efecto directo de afloramientos y derrames de agua dulce, provenientes de los ríos costeros. El equinodermo asteroideo, Acanthaster, que es uno de los coralivoros que mas estragos causa en las... |
| Tipo: Journal Contribution |
Palavras-chave: Coral reefs; Geographical distribution; Population structure; Coral reefs; Geographical distribution; Population structure; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_6115. |
| Ano: 1982 |
URL: http://hdl.handle.net/1834/3968 |
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| Alcolado, P.M.; Claro-Madruga, R.; Martínez-Daranas, B.; Menéndez-Macía, G.; García-Parrado, P.; Cantelar, K.; Hernández, M.; Valle, R.. |
| Cayo Largo del Sur, located in the southwest of Cuba south of the Gulf of Batabanó, is a beach and diving resort, far from the main island of Cuba and from Isla de la Juventud. Therefore, it is far from important permanent human settlements and from all agricultural and industrial development. However its western reefs are suffering a gradual deterioration process. Great scarcity of mesoherbivores (sea urchin Diadema antillarum, as well as scarid and acanthurid fishes), and high nutrient concentrations were observed. As a consequence, an excessive algal and cyanobacterial mat proliferation occurred. It has been reinforced by high temperatures in 1998 and by the simplification of bottom relief because of coral mortality caused by diseases and cyclones. The... |
| Tipo: Journal Contribution |
Palavras-chave: Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880. |
| Ano: 2001 |
URL: http://hdl.handle.net/1834/3183 |
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| Montalvo, J.F.; Perigó, E.. |
| Coral reefs are very sensitive to the increment in nitrogen concentrations and phosphorus, since these compounds propitiate the macroalgae growth, resulting in the degradation of coral reefs. With the purpose of assessing the degree of nutriphication of the coral reefs in Los Canarreos Archipelago, located in the periphery of the Gulf of Batabanó, and those located in the outer area of Sabana-Camagüey Archipelago (SCA), three samplings were executed in the reefs of Los Canarreos Archipelago (August 1999, March 2000 and August 2000). In SCA, samplings were done in May 2002 and August 2003. The parameters evaluated were nitrates + nitrite, ammonium, total nitrogen, inorganic phosphorus and total phosphorus. The nutrient contents in the reefs located in the... |
| Tipo: Proceedings Paper |
Palavras-chave: Coral reefs; Eutrophication; Nutrients (mineral); Nitrogen; Phosphorus; Coral reefs; Eutrophication; Nitrogen; Phosphorus; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_2734; Http://aims.fao.org/aos/agrovoc/c_5192; Http://aims.fao.org/aos/agrovoc/c_5804. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/2084 |
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| Registros recuperados: 41 | |
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