Variation in Growth Form of Shoal Grass (Halodule wrightii) Due to Changes in the Spectral Composition of Light below a Canopy of Turtle Grass (Thalassia testudinum)

Estuaries ◽  
1992 ◽  
Vol 15 (2) ◽  
pp. 214 ◽  
Author(s):  
David A. Tomasko
Keyword(s):  
Growth Form ◽  
Spectral Composition ◽  
Thalassia Testudinum ◽  
Halodule Wrightii ◽  
Turtle Grass

Reproductive phenology of the subtropical seagrasses Thalassia testudinum (turtle grass) and Halodule wrightii (shoal grass) in the northwest Gulf of Mexico

2016 ◽  
Vol 59 (6) ◽  
Author(s):  
Kelly M. Darnell ◽  
Kenneth H. Dunton
Keyword(s):  
Gulf Of Mexico ◽  
Life Histories ◽  
Thalassia Testudinum ◽  
Individual Species ◽  
Reproductive Phenology ◽  
Halodule Wrightii ◽  
Complete Understanding ◽  
Successful Management ◽  
Turtle Grass ◽  
Seagrass Cover

Abstract Seagrass cover is declining worldwide, and successful management, conservation and restoration require a complete understanding of individual species’ life histories. The historically undervalued importance of sexual reproduction in seagrass population dynamics has prompted investigations of reproductive phenology and output. Here, we present the results of a multi-year study examining the reproductive phenology and output of two dominant seagrass species in the northwest Gulf of Mexico,

Clonal diversity and connectedness of turtle grass (Thalassia testudinum) populations in a UNESCO Biosphere Reserve

2015 ◽  
Vol 123 ◽  
pp. 76-82 ◽  
Author(s):  
James J. Campanella ◽  
Paul A.X. Bologna ◽  
Maria Carvalho ◽  
John V. Smalley ◽  
Mohamedhakim Elakhrass ◽  
...  
Keyword(s):  
Biosphere Reserve ◽  
Clonal Diversity ◽  
Thalassia Testudinum ◽  
Turtle Grass

Decomposition and nitrogen dynamics of turtle grass (Thalassia testudinum) in a subtropical estuarine system

2017 ◽  
Vol 25 (6) ◽  
pp. 667-681 ◽  
Author(s):  
Monica Delgado ◽  
Carlos E. Cintra-Buenrostro ◽  
Alejandro Fierro-Cabo
Keyword(s):  
Thalassia Testudinum ◽  
Nitrogen Dynamics ◽  
Estuarine System ◽  
Turtle Grass

scholarly journals Elementos de la dieta del manatí Trichechus manatus manatus en tres sitios importantes para la especie en México y Belice

2013 ◽  
Vol 5 ◽  
pp. 25 ◽  
Author(s):  
Lavinia Flores-Cascante ◽  
Benjamín Morales-Vela ◽  
Nataly Castelblanco-Martínez ◽  
Janneth Padilla-Saldívar ◽  
Nicole Auil
Keyword(s):  
Health Assessment ◽  
Rhizophora Mangle ◽  
Thalassia Testudinum ◽  
Quintana Roo ◽  
Systematic Sampling ◽  
Halodule Wrightii ◽  
Trichechus Manatus ◽  
Herbivorous Mammals ◽  
Microhistological Analysis ◽  
First Time

Los manatíes (Trichechus manatus manatus) son mamíferos herbívoros y de hábitos oportunistas, se alimentan de casi 60 especies de plantas. El objetivo de este trabajo fue identificar los elementos de la dieta del manatí por medio de análisis de heces en dos sitios en México (Jonuta, Tabasco y Bahía de la Ascensión, Quintana Roo) y uno en Belice (Southern Lagoon). Las muestras provienen de manatíes de vida libre y en cautiverio que fueron capturados temporalmente para muestreo y evaluación de su salud durante el período 2004-2006. Un total de 24 muestras fueron procesadas. La identificación de los elementos de la dieta se basó en el análisis microhistológico de las heces y la separación de los ítems para su posterior comparación con material bibliográfico y colecciones histológicas. También se revisaron las muestras para la búsqueda de invertebrados. Las especies vegetales identificadas fueron: Thalassia testudinum, Rhizophora mangle, Halodule wrightii, Ruppia sp. y Panicum sp., esta última confirmada por primera vez para México. No se encontró evidencia de invertebrados en las muestras. El orden de importancia relativa de consumo de las especies vegetales por los manatíes coincide con lo reportado para otras regiones de América. Se recomienda hacer un mayor esfuerzo de muestreo en áreas donde se desconocen los ítems alimentarios de la especie.AbstractManatees (Trichechus manatus manatus) are herbivorous mammals with opportunistic habits that feed onapproximately 60 species of plants. The focus of this paper was to identify diet elements of the manateeby fecal analysis in two sites in Mexico (Jonuta, Tabasco and Bahía de la Ascensión, Quintana Roo) andone site in Belize (Southern Lagoon). Samples were obtained from wild manatees and captive manateestemporarily captured for health assessment and sampling during 2004-2006. A total of 24 samples wereanalyzed. Diet components were assessed by microhistological analysis of feces. Items were separated andcompared with bibliography and histological collections. Samples were also analyzed to detect invertebrates.Vegetal species found included Thalassia testudinum, Rhizophora mangle, Halodule wrightii, Ruppia sp. and Panicum sp., the latter confirmed for the first time for Mexico. No evidence of invertebrates wasfound in the samples. Relative importance of vegetal species consumed by manatees coincides with thefindings reported for other areas in the Americas. Further systematic sampling efforts are needed in areaswhere manatee diet items are unknown.

scholarly journals The Microbial Communities of Leaves and Roots Associated with Turtle Grass (Thalassia testudinum) and Manatee Grass (Syringodium filliforme) are Distinct from Seawater and Sediment Communities, but Are Similar between Species and Sampling Sites

2018 ◽  
Vol 7 (1) ◽  
pp. 4 ◽  
Author(s):  
Kelly Ugarelli ◽  
Peeter Laas ◽  
Ulrich Stingl
Keyword(s):  
Carbon Sink ◽  
Amplicon Sequencing ◽  
Thalassia Testudinum ◽  
Rrna Gene ◽  
Microbial Composition ◽  
Carbon Cycles ◽  
Syringodium Filiforme ◽  
Turtle Grass ◽  
Shoreline Protection ◽  
The 16S Rrna Gene

Seagrasses are vital members of coastal systems, which provide several important ecosystem services such as improvement of water quality, shoreline protection, and serving as shelter, food, and nursery to many species, including economically important fish. They also act as a major carbon sink and supply copious amounts of oxygen to the ocean. A decline in seagrasses has been observed worldwide, partly due to climate change, direct and indirect human activities, diseases, and increased sulfide concentrations in the coastal porewaters. Several studies have shown a symbiotic relationship between seagrasses and their microbiome. For instance, the sulfur, nitrogen, and carbon cycles are important biochemical pathways that seem to be linked between the plant and its microbiome. The microbiome presumably also plays a key role in the health of the plant, for example in oxidizing phyto-toxic sulfide into non-toxic sulfate, or by providing protection for seagrasses from pathogens. Two of the most abundant seagrasses in Florida include Thalassia testudinum (turtle grass) and Syringodium filliforme (manatee grass), yet there is little data on the composition of the microbiome of these two genera. In this study, the microbial composition of the phyllosphere and rhizosphere of Thalassia testudinum and Syringodium filiforme were compared to water and sediment controls using amplicon sequencing of the V4 region of the 16S rRNA gene. The microbial composition of the leaves, roots, seawater, and sediment differ from one another, but are similar between the two species of seagrasses.

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