The structure and productivity of the Thalassia testudinum community in Bon Accord Lagoon, Tobago
Rev. biol. trop
;
53(supl.1): 219-227, maio 2005. mapas, graf, tab
Article
in English
| LILACS
| ID: lil-456512
ABSTRACT
The Thalassia testudinum dominated seagrass community in the Buccoo Reef/ Bon Accord Lagoon Marine Park, measures 0.5 km(2) and is part of a contiguous coral reef, seagrass bed and mangrove swamp system in southwest Tobago. 7 testudinum coverage, productivity and percent turnover rates were measured from February 1998 to February 1999 at four sample locations, while total T. testudinum biomass was measured at two locations in the lagoon from 1992-2002. Productivity and turnover rates varied spatially and seasonally. They were higher in the back-reef area than in the mangrove-fringed lagoon, and were lowest at locations near to a sewage outfall. 7 testudinum coverage ranged from 6.6% in the lagoon to 68.5% in the back-reef area while productivity ranged from 3.9 to 4.9 g dry wt m(-2) d(-1) . Productivity and percentage turnover rates were higher in the dry season (January-June) than in the wet season (July-December). Productivity ranged from 3.0 in the wet season to 5.0 g dry wt m2 d-' in the dry season while percentage turnover rates ranged from 4.2% to 5.6%. Total Thalassia biomass and productivity in Bon Accord Lagoon were compared to six similar sites in the Caribbean that also participate in the Caribbean Coastal Marine Productivity Program (CARICOMP). This seagrass community is being negatively impacted by nutrient-enriched conditions
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Index:
LILACS (Americas)
Main subject:
Environmental Monitoring
/
Ecosystem
/
Hydrocharitaceae
Type of study:
Evaluation studies
Limits:
Animals
Country/Region as subject:
English Caribbean
/
Trinidad and Tobago
Language:
English
Journal:
Rev. biol. trop
Journal subject:
Biology
/
Tropical Medicine
Year:
2005
Type:
Article
Affiliation country:
Trinidad and Tobago
Institution/Affiliation country:
Institute of Marine Affairs/TT
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