Results 131 to 140 of about 1,140 (181)

Photoperiodism and Related Ecology in Thalassia testudinum

Botanical Gazette, 1968
A study was conducted to determine, through ecological observations and experimental manipulation, whether the marine angiosperm Thalassia testudinum Koening and Sims is responsive to photoperiod. The field observations, made in St. Andrew Bay on the northwestern Gulf Coast of Florida and in Biscayne Bay on the southern Atlantic Coast of Florida ...
Allan D. Marmelstein, Page W. Morgan, Willis E. Pequegnat   +2 more
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Occurrence of intracellular crystals in leaves of Thalassia testudinum

Aquatic Botany, 2004
Abstract Refractive, rhomboidal, intracellular crystals were identified in leaves of Thalassia testudinum Banks ex Konig (turtlegrass) from the Bahamas (Lee Stocking Island); Florida (Key Largo and Key West); and Texas (Laguna Madre). At all four collection sites, crystals were present in leaves of all ages and in most but not all epidermal cells ...
Fred C. Dobbs, Richard C. Zimmerman, Lisa A. Drake   +2 more
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Dormancy and foliar density regulation in Thalassia testudinum

Aquatic Botany, 2000
Abstract The hypothesis that the tropical seagrass, Thalassia testudinum from the Puerto Morelos reef lagoon (Mexican Caribbean) has a dormant apical meristem bank (as opposed to a dormant axillary meristem bank) was investigated by morphological and anatomical analyses of vertical shoot apices.
Brigitta I van Tussenbroek, Carlos A Galindo, Judith Marquez   +2 more
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Regrowth of the seagrass Thalassia testudinum into propeller scars

Aquatic Botany, 1997
Abstract Regrowth of turtle grass, Thalassia testudinum Banks ex Konig, into existing propeller scars and artificial cuts was studied in a mangal estuary located in Tampa Bay, Florida. Sediments from scars and cuts and adjacent grass beds were not significantly different in relation to particle size distribution and levels of calcium carbonate ...
Clinton J. Dawes, John Andorfer, Craig Rose, Christina Uranowski, Nicholas Ehringer   +4 more
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The Biology of Thalassia: Paradigms and Recent Advances in Research

2006
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Van Tussenbroek, B., Vonk, J.A., Stapel, J., Erftemeijer, P.L.A., Middelburg, J.J., Zieman, J.C.   +5 more
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Effects of natural and artificial Thalassia on rates of sedimentation

Journal of Sedimentary Research, 1987
Abstract Sediment traps were used to measure the rate of deposition in a Thalassia seagrass meadow and in an adjacent (sandy) grass-free area. The average depositional rate of mud in the Thalassia bed was 4.96 g trap (super -1) week (super -1) , and in the sandy area, it was 3.04 g trap (super -1) week (super -1) in the summer.
M. N. Almasi, C. M. Hoskin, J. K. Reed, J. Milo   +3 more
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The Effects of Tributyltin within a Thalassia Seagrass Ecosystem

Estuaries, 1990
Flow-through seagrass core microcosms were used to examine responses of species and processes to a logarithmic gradient of dosing with14C-labeled tributyltin-chloride (TBT-CI). Experiments involved delivery of TBT-CI to the water column of replicate cores of a treatment (n=16) once per week; one-half of the cores were sacrificed after 3 wk of dosing ...
John R. Kelly, Suzanne N. Levine, Linda A. Buttel, Kelly A. Carr, David T. Rudnick, R. Dana Morton   +5 more
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Vegetative Branching in Thalassia testudinum (Hydrocharitaceae)-A Correction

Botanical Gazette, 1972
Horizontal scale-bearing rhizomes in Thalassia produce, at fairly regular but distant intervals, lateral branches which develop into erect, leafy shoots. These branches are leaf-opposed, not axillary. Since they originate precociously and are at first equal to the main axis, it had been suggested that they are the result of an equal dichotomy of the ...
P. B. Tomlinson, G. W. Bailey
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Observations on the reproductive ecology of Thalassia testudinum (hydrocharitaceae)

Aquatic Botany, 1981
Abstract A phenological inversion in Thalassia testudinum Banks ex Konig was indicated by the presence of early fruit stage in midwinter. Further observations in Januarary 1979 detected early reproductive bud presence, and 44% of the short-shoots examined were reproductive.
Mark D. Moffler, Michael J. Durako, William F. Grey   +2 more
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Spectral reflectance of Thalassia testudinum with varying depths

IEEE International Geoscience and Remote Sensing Symposium, 2003
Seagrasses are an important component in the marine ecosystem, and also a vulnerable resource subject to environmental change. Satellite and airborne remote sensing has been applied in monitoring and mapping seagrasses. One research issue from a remote sensing perspective is the spectral impact of water column depths since seagrasses normally grow in ...
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