Download or read book Exchange of Carbon Nitrogen and Phosphorus in Lacava Bay Texas Marshes Volume 1 The Role of Sediments in Nutrient Exchange in the Lacava Bay Brackish Marsh written by University of Texas at Austin. Center for Research in Water Resources and published by . This book was released on 1976 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Exchange of Carbon Nitrogen and Phosphorus in Lavaca Bay Texas Marshes written by Anita J. Dawson and published by . This book was released on 1975 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Exchange of Carbon Nitrogen and Phosphorus in Lavaca Bay Texas Marshes Armstrong N E Brown B A The role of sediments in nutrient exchange in Lavaca Bay brackish marsh system written by and published by . This book was released on 1976 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Role of Sediments in Nutrient Exchange in the Lavaca Bay Brackish Marsh System written by Neal Earl Armstrong and published by . This book was released on 1976 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Exchange of nitrogen and phosphorus with sediments of the brackish water marshes of Lavaca Bay Texas written by Billy Austin Brown and published by . This book was released on 1975 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Role of Sediments in Nutrient Exchange in the Lavaca Bay Brackish Marsh System written by University of Texas at Austin. Center for Research in Water Resources and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Exchange Rates for Carbon Nitrogen and Phosphorus in Nueces and San Antonio Bay Marshes written by Neal Earl Armstrong and published by . This book was released on 1977 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Exchange Rates for Carbon Nitrogen and Phosphorus in the Colorado River Delta Marshes written by Neal Earl Armstrong and published by . This book was released on 1977 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Exchange of Carbon Nitrogen and Phosphorus in Lavaca Bay Texas Marshes written by Anita J. Dawson and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Exchange of Carbon Nitrogen and Phosphorus in Lavaca Bay Texas Marshes written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biogeochemical Cycling of Carbon Nitrogen and Phosphorus in Saltwater Marshes of Lavaca Bay Texas written by Neal Earl Armstrong and published by . This book was released on 1975 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Exchange Rates for Carbon Nitrogen and Phosphorus in the Trinity River Delta Marshes written by Neal Earl Armstrong and published by . This book was released on 1977 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The role of plants in nutrient exchange in the Lavaca Bay brackish marsh system written by Anita Joan Dawson and published by . This book was released on 1975 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Exchange Rates for Carbon Nitrogen and Phosphorus in Nueces and San Antonio Bay Marshes written by Neal Earl Armstrong and published by . This book was released on 1974 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biogeochemical Cycling of Carbon Nitrogen and Phosphorus Nutrients in River Delta Marshes of Lavaca Bay Texas written by Texas. Department of Water Resources and published by . This book was released on 1978 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nitrogen Phosphorus and Carbon Flux in Chesapeake Bay Marshes written by Donald M. Axelrad and published by . This book was released on 1976 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annual nitrogen, phosphorus and carbon budgets for two Virginia salt marshes were determined by monthly measurements of water discharge and constituent concentrations over tidal cycles. Considering all three forms of phosphorus measured (total, dissolved organic and orthophosphate) there was a net loss from the estuary to the marches. The data reveal a loss of particulate phosphorus of estuarine origin to marsh sediments and mineralization of this phosphorus in the marshes with subsequent export of dissolved inorganic and organic phosphorus back to the estuary. Nitrogen flux data show a loss of nitrate and nitrite to the marshes. Particulate nitrogen is imported to the marshes where it is mineralized and returned to the estuary as ammonia and dissolved organic nitrogen. The magnitude of nitrogen export suggests significant fixation of atmospheric nitrogen by marsh flora with subsequent export as dissolved species. Carbon flux data show significant contributions of both particulate and dissolved organic carbon to the estuary from the marshes. Estimates of export, based on marsh grass productivity, suggest a loss of 36 and 49 percent of a year's primary production on the marshes as detritus for Ware and Carter Creeks respectively.

Download or read book Factors Affecting Carbohydrate Production and Loss in Salt Marsh Sediments of Galveston Bay written by Carolyn E. Wilson and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Benthic microalgae (BMA) living within the surface sediment of salt marshes are highly productive organisms that provide a significant proportion of organic carbon inputs into estuarine systems. BMA secrete extracellular carbohydrates in the form of low molecular weight carbohydrates and extracellular polymeric substances (EPS) as they migrate within the sediment. EPS plays an important role in the structure and function of BMA biofilms in shallow-water systems as EPS affects habitat structure, stabilizes the sediment, reduces sediment erosion, and is a carbon source for organisms. This study looked at the effect of nutrients and carbohydrate additions on BMA biomass, bacterial biomass, carbohydrate production, and glycosidase activity in the surface 5 mm of intertidal sediment in a subtropical salt marsh (Galveston Bay, Texas). Nitrogen and phosphorus were added to cores collected from the salt marsh and incubated in the lab over four days. Very little change was seen in the biomass of the benthic microalgae or in the different carbohydrate fractions with the added nutrients. The mean chlorophyll a concentration was 13 +/- 5 ug g-1 sediment, the mean saline extractable carbohydrate concentration was 237 +/- 113 ug g-1 sediment, and the mean EPS concentration was 48 +/- 25 ug g-1 sediment. The chlorophyll a and saline extractable carbohydrate concentrations initially decreased over the first 24 hours, but then increased over the rest of the experiment, indicating a possible species compositional shift in the BMA. With no major response with nutrient additions, it is likely that a different environmental factor is limiting for the growth of the benthic microalgae, and therefore the production of sEPS, in this salt marsh. A series of experiments was conducted in situ by adding glucose, alginic acid, and phosphorus to sediment within experimental plots. Samples were taken periodically over three to seven days to determine the biomass of the microbial community, enzyme activities and kinetics, and changes in the concentrations of several sediment carbohydrate pools. u-glucosidase activities (15 +/- 3 nmol g-1 h-1) were significantly higher than u-xylosidase (6 +/- 2 nmol g-1 h-1) and u-galactosidase (8 +/- 2 nmol g-1 h-1) activities within the sediment, and there was no suppression of u-glucosidase activity measured with the glucose addition. These data represent the first measurement of u- xylosidase and u-galactosidase activity in intertidal sediment dominated by BMA. Although preliminary experiments suggested a possible phosphorus limitation within the sediment, there was little change in the bacteria abundance or the benthic microalgae biomass when phosphorus was added in situ. This study begins to illustrate the dynamics of carbohydrate production and loss in this salt marsh, and the ability for the microbial community in the salt marshes of Galveston Bay to adjust to the nutrient and carbohydrate treatments.