Seasonal changes in the standing crop and chlorophyll content of Thalassia testudinum Banks ex König and its epiphytes in the northern Gulf of Mexico

Macauley, John M.; Clark, James R.; Price, W. Allen

doi:10.1016/0304-3770(88)90017-4

Cited by 27 publications

(9 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Instead, the seasonal changes in total chl content and chl a : b ratios noted in this study are similar to those noted by Macauley et al (1988), who noted that Thalassia testudinum blade chl concentrations were highest and chl a: b ratios lowest during summer and early fall. These results provide evidence that variations in chl were related to water temperature and not to photoadaptative responses to changes in underwater irradiance.…”

Section: Biomass and Productionsupporting

confidence: 90%

“…Similar trends in seagrass standing crop and production have been reported for T. testudinurn and other species earlier by several authors (Macauley et al 1988, Dunton 1990, Thom 1990), and were attributed to changes in water temperature and insolation. Temperature has been considered as a major factor controlling seasonal growth (Tutin 1942, Phillips et al 1983) because of its significant effect on the biochemical process involved in photosynthesis and tissue metabolism (Bulthuis 1987).…”

Section: Biomass and Productionsupporting

confidence: 87%

“…Christi Bay was similar to those reported for most other geographical areas ( (Wiginton & McMillan 1979, Dennison & Alberte 1982, 1985, Macauley et al 1988, Abal et al 1994. Seagrasses typically respond to light reduction by increasing chl content and decreasing chl a:b ratios (Wiginton & McMillan 1979, Dennison & Alberte 1982, 1985, Abal et al 1994, Lee & Dunton 1996.…”

Section: Biomass and Productionsupporting

confidence: 82%

See 2 more Smart Citations

Production and carbon reserve dynamics of the seagrass Thalassia testudinum in Corpus Christi Bay, Texas, USA

Lee

Dunton²

1996

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

The seasonal production dynamics of Thalassia testudinum in Corpus Christi Bay, Texas (USA) were evaluated through measurements of biomass, leaf growth and carbohydrate carbon content from December 1993 to March 1995. Shoot density and blomass changed significantly with season; values ranged from 321 shoots m-' (454 g dry wt m-2) in March to 531 shoots m-' (885 g dry wt m-?) in September Biomass of individual plant parts was significantly different over the sampling period; rhizome tissues tended to have the highest biornass while root tissues had the lowest. However, leaf biomass was higher than that of rhizome tissues during summer. Leaf productivities showed significant seasonal variation that was strongly correlated with temperature, ranging from 0.07 g dry wt m-2 d-' in December to 5.6 g dry wt d-' in July. Chlorophyll [chl) concentrations were significantly higher and chl a:0 ratios lowest during the spnng/summer period of maximum photosynthetic production and growth than during winter. Non-structural carbohydrate carbon content was highest in rhizome tissues (111 to 203 mg C g-' dry wt) and lowest in leaf tissues (46 to 70 mg C g-l dry wt), which is consistent with the rhizome's role as a carbon storage tissue. Rhizome carbohydrate carbon content increased rap~dly during June and July, which coincided with h~g h water temperatures, underwater irradiance and blade chl concentrations. During winter and early spring, rhizome carbohydrate carbon content dropped nearly 50%, suggesting that these reserves were mobilized for tissue maintenance and new growth in early spring. Estimated annual blade production of T testudinum in Corpus Christi Bay over the period of this study was 792 g dry wt rn-"r-l, equivalent to 253 g C m-2 yr-' Overall, annual productivity appears to be primarily regulated by temperature and secondarily by ~rradiance, as reflected in the timing and magnitude of the strong seasonal variations in leaf product~v~ty, total chl content, chl a:b ratios and rhizome carbohydrate carbon content in T testudinum.

show abstract

Section: Biomass and Productionsupporting

confidence: 90%

Section: Biomass and Productionsupporting

confidence: 87%

Section: Biomass and Productionsupporting

confidence: 82%

See 1 more Smart Citation

Production and carbon reserve dynamics of the seagrass Thalassia testudinum in Corpus Christi Bay, Texas, USA

Lee

Dunton²

1996

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…ESB-02 edge station T. testudinum plant parameter values were consistently lower than those of the shallower stations, consistent with effects of reduced light availability (Lee et al 2007). The seasonal cycling of leaf biomass abundance previously observed with Santa Rosa Sound T. testudinum (Macauley et al 1988;Smith et al 2004) was most apparent for ESP-0405 when samples were collected in April, July, and February. In addition, an earlier observation that Santa Rosa Sound T. testudinum belowground biomass weights were higher in winter than summer (Smith et al 2004) was consistent with the ESP-0405 measurements and in the negative correlation of belowground biomass with temperature.…”

Section: Plantásediment Interactionsmentioning

confidence: 86%

“…Santa Rosa Sound was good study area for this purpose because it has numerous seagrass beds that experienced changes in temperature, salinity, and water clarity which can influence seagrass growth (Murrell et al 2007). Thalassia testudinum is near its northern range of distribution in Santa Rosa Sound and undergoes a seasonal cycle of leaf standing crop decreasing with the onset of winter and increasing in the summer (Macauley et al 1988). In the present study, T. testudinum shoot numbers varied between sites, and leaf and belowground biomass varied with time ( Figures 1Á3).…”

Section: Discussionmentioning

confidence: 98%

Interactions ofThalassia testudinumand sediment biogeochemistry in Santa Rosa Sound, NW Florida

Devereux

Yates

Aukamp

et al. 2011

Marine Biology Research

View full text Add to dashboard Cite

Thalassia testudinum belowground biomass weights, leaf weights, leaf growth rates, areal shoot densities (m (2 ), and leaf C:N:P ratios were compared to a set of biogeochemical parameters to gain information on seagrassÁsediment interactions that may influence seagrass growth. Data were compiled from three surveys conducted in Santa Rosa Sound, located in northwest Florida, at three different meadows in sequential years. Biomass measurements and leaf growth rates decreased between stations along transects from shallow to deeper water. Belowground biomass weights decreased and leaf C:P ratios increased with temperature reflecting a seasonal growth pattern. The T. testudinum parameters were highly correlated with each other. Sulfate reduction rates (at times exceeding 1000 nmol ml (1 day (1 ) were among the highest recorded for seagrass beds with temperature accounting for 79% of the variation. Even though sulfate reduction rates were high, total Fe:reduced S ratios indicated sufficient Fe to account for all reduced S as pyrite. Sediment Fe, C, N, and organic P concentrations increased with sediment depth, whereas inorganic P decreased with depth, suggesting burial of organic P and root uptake of inorganic P. Leaf C:N:P ratios indicated P-limited growth for two surveys. NH 4 ' was detected in water above the sediment surface during some surveys demonstrating T. testudinum meadows at times may serve as sources of inorganic N to the water column. Plant parameters correlated with concentrations of sediment organic C and N, Fe, S, and porewater NH 4 ' . These results highlight the importance of the organic matter and Fe contents of sediments to seagrass growth.

show abstract

A temporal investigation of grazer dynamics, nutrients, seagrass leaf productivity, and epiphyte standing stock

Frankovich

Zieman

2005

Estuaries

View full text Add to dashboard Cite

Seasonal changes in the standing crop and chlorophyll content of Thalassia testudinum Banks ex König and its epiphytes in the northern Gulf of Mexico

Cited by 27 publications

References 4 publications

Production and carbon reserve dynamics of the seagrass Thalassia testudinum in Corpus Christi Bay, Texas, USA

Production and carbon reserve dynamics of the seagrass Thalassia testudinum in Corpus Christi Bay, Texas, USA

Interactions ofThalassia testudinumand sediment biogeochemistry in Santa Rosa Sound, NW Florida

A temporal investigation of grazer dynamics, nutrients, seagrass leaf productivity, and epiphyte standing stock

Contact Info

Product

Resources

About