Blum b a the university of north carolina at wilmington, center for marine science and department of biology and marine biology, 5600 marvin moss lane, wilmington, nc 28409, united states. Thalassia testudinum in the germplasm resources information network grin, u. The species grows from the lowwater mark to nearly 10 m depth in very clear water. Shoot density, leaf growth, initiation, biomass and primary production in thalassia testudinum banks ex konig were monitored at monthly intervals fr. Dennison a a university of maryland center for environmental science, p. Seagrasses of various kinds have inhabited florida bay for centuries and. Propeller scars in turtlegrass thalassia testudinum meadows final report to usfws margaret o. Assessing the health of thalassia testudinum at the landscape scale using chlorophyll fluorescence michael j. Whitfield et al thalassia testudinum seedling recruitment in south florida, thalassia testudinumflowers from april to july, with peak inflorescence densities in june tomlinson 1969. The website also provides access to a database and.
Seagrass beds of the indian river lagoon 4 impacts to seagrasses over the past 20 years, losses of seagrasses along the lagoon have been severe, with some areas losing up to 95 percent of. Concurrent 12week laboratory and field studies were conducted to determine toxicity of the suspended particulate phase spp of drilling fluid to thalassia testudinum and its epiphytes. The atlas of florida plants provides a source of information for the distribution of plants within the state and taxonomic information. Recruitment of thalassia testudinum seedlings into physically disturbed seagrass beds paula e.
Response of thalassia testudinum morphometry and distribution. Bacterial diversity of siliciclastic sediments in a thalassia. Antinociception produced by thalassia testudinum extract bm. Plants profile for thalassia testudinum turtlegrass.
A 6day in situ comparison between the wetzel inorganic 14c uptake and zieman leafbiomass techniques for measuring net primary production rates in the seagrass thalassia testudinum was performed in the northeastern gulf of mexico. Drift algaeepiphyteseagrass interactions in a subtropical thalassia testudinum meadow article pdf available in marine ecology progress series 279. This document is sgef245, one of a series of the florida sea grant college. Effects of community structure on the seagrass thalassia. Seasonal variations of polychaetes in a thalassia testudinum bed were studied from june 2000 to april 2001 in chacopata, northeastern venezuela. Measurement differences between the two methods were insignificant when the 14c uptake technique was corrected for sediment 14c uptake %, incubation. According to fwc, the highestranked stressors to seagrasses in florida are.
Scattergood,editor maryfukuyama,associateeditor publicationboard johna. Thalassia testudinum as they begin developing into seedlings while still inside the fruit. Abstract a comparison of leaf growth and new leaf production in plots of cut and uncut turtle. A flat bladed, dark green sea grass featuring an extensive root system that securely. Developing techniques to enhance the recovery rates of. Thalassia testudinum an overview sciencedirect topics. Other areas, however, have remained stable and productive. Variation in pigment content of thalassia testudinum.
Photosynthetic rapid light curves rlc of thalassia testudinum exhibit diurnal variation e. Seagrasses are submerged marine plants that are anchored to the. Epiphytic diatoms of thalassia testudinum hydrocharitaceae from the mexican caribbean article pdf available in marine biodiversity records 6. Seagrass ecosystems in the ngom are composed of six seagrass species thalassia testudinum, syringodium filiforme, halodule wrightii, ruppia maritima, halophila engelmannii and halophila decipiens florida, numerous species of macroalgae, and host a suite of microalgal epibionts.
Final report multiscale assessment of the population. Thalassia testudinum productivity and grazing by green turtles in a. Seagrass beds of the indian river lagoon 4 impacts to seagrasses over the past 20 years, losses of seagrasses along the lagoon have been severe, with some areas losing up to 95 percent of their coverage. Examination of a dense thalassia testudinum meadow in florida bay showed that light variability can differ nearly an order of magnitude from the top to the bottom of the seagrass. Simulated green turtle grazing avects nutrient composition. Neuroprotective and antioxidant effects of thalassia. The effects of chronic light reduction on thalassia testudinum at stations across the gulf of mexico final report to the epa environmental research laboratory gulf breeze david a. A flat bladed, dark green sea grass featuring an extensive root system that securely anchors and protects the plants from tidal surge, storms and ocean currents. Recruitment of thalassia testudinum seedlings into. The seagrass thalassia testudinum, or turtlegrass, has been determined to be a keystone species in the florida bay ecosystem, that is, a species upon which many other species in the ecosystem depend for survival. Pdf on jan 1, 1984, jc zieman and others published herbivory effects on thalassia testudinum leaf growth and nitrogen content find, read and cite all the. Thalassia testudinum is the dominant seagrass in southeast florida as well as the florida gulf coast. We examined preferences of the bucktooth parrotfish sparisoma radians for the turtle grass thalassia testudinum with high or low nitrogen concentrations in.
Distichlis spicata photo cpr thalassia testudinum inflorescence photo cpr thalassia testudinum photo cpr. Itis taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties. Seagrass sediment bacteria were not related to groups from other marine habitat types. Judson kenworthy2, donna berns1, keri ferenc1, jennifer kunzelman1, farrah hall1, and jitkya hyniova1 1florida fish and wildlife conservation commission florida fish and wildlife research institute 100 eighth ave. Thalassia testudinum turtle grass south pigeon creek estuary, san salvador island, bahamas 4 16045757515. Neuroprotective effects of thalassia testudinum leave. Leaf mass of thalassia testudinum ranged between 45. After planting the refugium with some turtle grass thalassia testudinum on 214 i am very happy with its appearance. These seagrass beds are highly disturbed by heavy boat usage and are intensively grazed by the green turtle chelonia mydas l. Productivity and biomass of thalassia testudinum as related to water column nutrient availability and epiphyte levels.
Turtlegrass thalassia testudinum banks ex konig description. The aqueous ethanolic extract of the marine plant thalassia testudinum, named bm21, has powerful antioxidant and antilipoperoxidative activities. Pacific turtlegrass shores of the western and central indopacific thalassia testudinum banks ex k. Pdf evaluacion del pasto marino thalassia testudinum. Nitrogenrich groundwater intrusion affects productivity, but. Acidsensing ion channels asics have a significant role in the sensation of pain and constitute an important target for the search of new antinociceptive drugs.
Konig caribbean turtlegrass gulf of mexico, caribbean sea, and bermuda references. Tropical seagrass communities are dominated by the. The dominant seagrass in most of this region is thalassia testudinum, turtle grass, with syringodium filiforme and halodule wrightii often intermixed with t. Effects of chronic light reduction on thalassia testudinum at. Merello3 1noaa beaufort laboratory, 101 pivers island road, beaufort, north carolina 28516, usa. Development of an epiphyte indicator of nutrient enrichment.
Jan 24, 2011 acidsensing ion channels asics have a significant role in the sensation of pain and constitute an important target for the search of new antinociceptive drugs. Department of agriculture agricultural research service. Thalassia testudinum leaf dynamics in a mexican caribbean coral. Simulated green turtle grazing avects nutrient composition of. Responsible boating protects seagrass meadows1 savanna barry, ana zangroniz, and joy hazell2 1. Highlights bacterial diversity from siliciclastic sediments in a thalassia testudinum is assessed. The thalassia testudinum dominated seagrass community in the. The website also provides access to a database and images of herbarium specimens found at the university of south florida and other herbaria. The thalassia testudinum dominated seagrass community in the buccoo reef bon accord lagoon marine park, measures 0. Gobler school of marine and atmospheric sciences, stony brook university, 239. Thalassia testudinum dutch caribbean biodiversity database. Seagrass ecosystems in the ngom are composed of six seagrass species thalassia testudinum, syringodium filiforme, halodule wrightii, ruppia maritima, halophila engelmannii. Shoots and rhizomes of thalassia testudinum were collected in 12 to 24 depending on plant density replicated cores 20.
This sea grass has a horizontal rhizome, buried as much as 25 cm deep in the sediment. The caribbean sea and gulf of mexico have 9 seagrass species. Depth was determined from bathymetry surveys of the caloosahatchee estuary and the resulting information supplied in a gis data file that matched the grid cell. Thalassia testudinum, commonly known as turtlegrass, is a species of marine seagrass. Vicente, in coastal plant communities of latin america, 1992. Species of thalassia are the most abundant marine plant in the caribbean. Ecological resilience indicators for seagrass ecosystems. I cant wait for the grass to spread throughout the bottom of the. Spatial and temporal patterns in thalassia testudinum leaf tissue nutrients at chandeleur islands. Discovery bay, jamaica, is a coastal lagoon with areas of substantial submarine ground.
Mass mortality of the tropical seagrass thalassia testudinum in. Polychaeta annelida associated with thalassia testudinum in. Eight replicate samples were taken monthly with a 15 cm diameter core and the sediment was passed through a 0. Thalassia testudinum is the dominant seagrass in south florida, a region that exhibits wide variations in salinity and water. Here we present evidence that seagrass detritus from the widespread species, thalassia testudinum, is an. Thalassia testudinum is a perennial grass growing from a long, jointed rhizome. In this work we studied the antinociceptive properties of the bm21 extract, obtained from the sea grass thalassia testudinum, in chemical and thermal models of nociception in mice. It forms meadows in shallow sandy or muddy locations in the caribbean sea and the gulf of mexico. The rhizome is buried in the substrate 5 to 10 cm 2 to 4 in deep, exceptionally down to 25 centimetres 9.
Pacific turtlegrass shores of the western and central indopacific. Thalassia testudinum is the dominant seagrass in south florida, a region that exhibits wide variations in salinity and water clarity zieman 1982. Sf syringodium filiforme, hw halodule wrightii, and rm ruppia maritima. The effects of an extract from the marine plant thalassia testudinum on rat liver cytochrome p450s were investigated. Spatial and temporal patterns in thalassia testudinum leaf. Canopylevel photophysiology of the seagrass thalassia. Thalassia testudinum is a seagrass that forms dense, extensive pastures in the greater caribbean. Thalassia testudinum turtle grass south pigeon creek estuary, san salvador island, bahamas 6 15859999657. Hsi for the seagrass, halodule wrightii and thalassia testudinum. Turtle grass,thalassia testudinum banks ex konig is the dominant species in the. Gobler school of marine and atmospheric sciences, stony brook university, 239 montauk hwy, southampton, new york 11968, usa abstract. Photosynthetic rapid light curves rlc of thalassia. Eutrophication threatens caribbean seagrasses a dutch.
Spatial and temporal patterns in thalassia testudinum leaf tissue nutrients at the chandeleur islands, louisiana, usa kelly m. Moderatetodensestandsofthalassiaand diplantheracoverthemuddeltasateachend. Thalassia testudinum turtle grass south pigeon creek. Some sequences were related to endosymbionts from lucinisca nassula hosts in the same meadow. They draw water which carries food particles into their internal. Pdf effects of nitrogen concentrations in turtlegrass thalassia. Thalassia on integrated taxonomic information system. The influence of community structure on the seagrass thalassia testudinum was studied in 3 distinct communities. Nitrogenrich groundwater intrusion affects productivity. Biomass and dynamics of thalassia testudinum in the.
This study was undertaken to determine the relationships between the biomass, morphometry, and density of short shoots ss of the tropical seagrass thalassia testudinum and the. Examination of a dense thalassia testudinum meadow in florida bay showed that light variability can differ nearly an order of magnitude from the top to the bottom of the seagrass canopy and light penetration through the canopy is highly sensitive to the incident angle of the sun. Recruitment of thalassia testudinum seedlings into physically. Thalassia testudinum is possibly the most important marine spermatophyte along the coasts of the caribbean and gulf of mexico c. Whitfield et al thalassia testudinum seedling recruitment in south florida, thalassia testudinumflowers from april to july, with peak inflorescence densities in june tomlinson. Productivity and biomass of thalassia testudinum as. Cpr thalassia testudinum university of southern mississippi. Some nodes are leafless but others bear a tuft of several erect, linear leaf blades. A total of 1 0 specimens, belonging to 35 species, was collected.
Responsible boating protects seagrass meadows 2 seagrass meadows are threatened the florida fish and wildlife conservation commission fwc names seagrasses as one of the most threatened marine habitats in florida fwc 2012. Seagrasses play a variety of important ecological roles in coastal ecosystems. Thalassia is a marine seagrass genus comprising two known species. Polychaeta annelida associated with thalassia testudinum. The structure and productivity of the thalassia testudinum. A 6day in situ comparison between the wetzel inorganic 14c uptake and zieman leafbiomass techniques for measuring net primary production rates in the seagrass thalassia. Male wistar rats were administered for 10 days with 20, 200 or 400. It may also thrive on rocky substrate in strong currents of rocky reef channels, such as in the bahamas.
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