Results 131 to 140 of about 660 (167)

The water economy of the sea grass Thalassia testudinum

Marine Biology, 1971
The osmotic values in the leaves of Thalassia testudinumBanks ex Konig, collected from the natural habitat, were found to be 32 atm; the relative transpiration was 100%. Electronmicroscopical analysis of the cuticle reveals many perforations. The critical sublethal water deficit lies near 65%.
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Factors affecting the reproductive ecology of Thalassia testudinum (Hydrocharitaceae)

Aquatic Botany, 1987
Abstract Morpho-anatomical studies of short-shoots of Thalassia testudinum Banks ex Konig collected in Tampa Bay, Florida from February 1979 to October 1980 ( n = 5394) demonstrated the presence of sexually reproductive short-shoots during all months, except August and September. Mean inflorescence lengths (MIL) indicated that little inflorescence
Michael J. Durako, Mark D. Moffler
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Thalassia testudinum productivity: A field comparison of measurement methods

Marine Biology, 1976
A 6-day in situ comparison between the Wetzel inorganic 14C uptake and Zieman leaf-biomass techniques for measuring net primary production rates in the seagrass Thalassia testudinum was performed in the northeastern Gulf of Mexico. Measurement differences between the two methods were insignificant when the 14C uptake technique was corrected for ...
H. F. Bittaker, R. L. Iverson
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Vertical growth of Thalassia testudinum: seasonal and interannual variability

Aquatic Botany, 1994
The vertical growth of shoots of the seagrass Thalassia testudinum Banks ex Konig in four meadows, along a range of exposure to waves, in the Mexican Caribbean was examined to elucidate its magnitude and its relationship to sediment dynamics. Average internodal length varied between 0.17 and 12.75 mm, and was greatest in the meadow which experienced ...
Núria Marbà, Margarita E. Gallegos, Martín Merino, Carlos M. Duarte   +3 more
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Nitrogen fixation (acetylene reduction) in the phyllosphere of Thalassia testudinum

Marine Biology, 1977
N2 fixation (C2H2 reduction) associated with the leaves of the sea grass Thalassia testudinum was investigated at 5 sites in South Florida (Biscayne Bay) and one site in the Bahamas (Bimini Harbor). Significant activities were correlated with the occurrence of a heterocystous blue-green alga (Calothrix sp.) on the leaves.
D. G. Capone, B. F. Taylor
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Thalassia testudinum response to the interactive stressors hypersalinity, sulfide and hypoxia

Aquatic Botany, 2007
Abstract A large-scale mesocosm (sixteen 500 L tanks) experiment was conducted to investigate the effects of hypersalinity (45–65 psu), porewater sulfide (2–6 mM) and nighttime water column hypoxia (5–3 mg L−1) on the tropical seagrass Thalassia testudinum Banks ex Konig.
Koch, Marguerite S., Schopmeyer, Stephanie A., Holmer, Marianne, Madden, Chris J., Kyhn-Hansen, C.   +4 more
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Carbonate mud; production by epibiont growth on Thalassia testudinum

Journal of Sedimentary Research, 1970
Abstract Epibiotic growth of coralline red algae and serpulid worms on the marine turtle grass Thalassia testudinum is sufficient to produce carbonate mud at rates comparable to the rates of accumulation of ancient platform carbonates.
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Phosphorus uptake kinetics of a dominant tropical seagrass Thalassia testudinum

Aquatic Botany, 2003
Although nitrogen is primarily the dominant nutrient limiting seagrass production in temperate estuaries, phosphorus (P) limitation can be important in tropical carbonate-dominated seagrass systems. While nitrogen uptake kinetics of seagrasses are moderately well established, very limited data exist on the dynamics of P-uptake.
Amy F Gras, Marguerite S Koch, Christopher J Madden   +2 more
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Wound-induced accumulations of condensed tannins in turtlegrass, Thalassia testudinum

Aquatic Botany, 2008
Abstract Turtlegrass, Thalassia testudinum, produces high concentrations of proanthocyanidins (condensed tannins) which we hypothesized are induced by grazing, as a component of a general wound response. To test this we quantified condensed tannins in a variety of turtlegrass tissues following simulated fish grazing, grazing by the urchin Lytechinus ...
Thomas M. Arnold, Christopher E. Tanner, Michelle Rothen, Jessica Bullington   +3 more
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The influence of freshwater runoff on biomass, morphometrics, and production of Thalassia testudinum

Aquatic Botany, 2002
Efforts to restore more natural freshwater flows in South Florida will impact Biscayne Bay. In order to evaluate possible effects of decreased freshwater discharge on the seagrass Thalassia testudinum, we determined the biomass, density, morphometrics (width, length, number of blades per shoot) and production of T. testudinum twice a year for 2 year at
Elizabeth Irlandi, Beth Orlando, Silvia Maciá, Patrick Biber, Tahzay Jones, Louis Kaufman, Diego Lirman, El Tanya Patterson   +7 more
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