Assessment of saltwater intrusion impact on gas exchange behavior of Louisiana Gulf Coast wetland species

1989 ◽  
Vol 1 (1) ◽  
pp. 21-30 ◽  
Author(s):  
S. R. Pezeshki ◽  
R. D. DeLaune ◽  
W. H. Patrick
Keyword(s):  
Gas Exchange ◽  
Saltwater Intrusion ◽  
Gulf Coast ◽  
Wetland Species

Gas exchange and growth of bald cypress seedlings from selected U.S. Gulf Coast populations: responses to elevated salinities

1995 ◽  
Vol 25 (9) ◽  
pp. 1409-1415 ◽  
Author(s):  
S.R. Pezeshki ◽  
R.D. Delaune ◽  
H.S. Choi
Keyword(s):  
Gas Exchange ◽  
Biomass Production ◽  
Growth Traits ◽  
Gulf Coast ◽  
Net Photosynthesis ◽  
Salinity Treatment ◽  
Root Porosity ◽  
Bald Cypress ◽  
Freshwater Source ◽  
Freshwater Population

Bald cypress (Taxodiumdistichum (L.) Rich.) seedlings from two sources in Louisiana were tested for a possible difference in salt tolerance. The study was conducted in rhizotrons under controlled environmental-conditions. Seedlings were subjected to a control (no flood or salt) and three combinations of flooding salinity: flooding only, flooding plus 68 mol•m−3 salt (4 ppt), and flooding plus 136 mol•m−3 salt (8 ppt). Both populations survived the flooding and salinity treatments for the duration of the study. However, gas exchange and net biomass production were reduced in both populations as salinity of floodwater increased from 0 to 136 mol•m−3. The gas exchange and biomass data indicated that plants from the freshwater source had higher growth rates than the brackish plants. This superiority was also maintained under all the treatments except the highest salinity treatment. Significantly greater net photosynthetic capacity per unit area of leaf was found for the freshwater population than for the brackish population in 68 mol•m−3 salt. In addition, greater root porosity, height growth, and biomass production (shoot, root) were found for the freshwater population than for the brackish population under different treatments. The data indicate that there is a potential for population differentiation in bald cypress, as shown primarily by differences in growth traits. However, the data do not support the hypothesis that bald cypress plants from the brackish source have a capacity to survive and grow better in saltwater than plants from the freshwater source. In fact, combined flooding and salinity treatments resulted in significant reductions in net photosynthesis as compared with the control in both sources.

Teletinnitus Program at the VA Gulf Coast Veterans Health Care System

2014 ◽  
Vol 4 (1) ◽  
pp. 23-29
Author(s):  
Constance Hilory Tomberlin
Keyword(s):  
Health Care ◽  
Patient Satisfaction ◽  
Patient Care ◽  
Health Care System ◽  
Gulf Coast ◽  
New Technology ◽  
Cost Effective ◽  
Veterans Health ◽  
Potential Benefits ◽  
Care System

There are a multitude of reasons that a teletinnitus program can be beneficial, not only to the patients, but also within the hospital and audiology department. The ability to use technology for the purpose of tinnitus management allows for improved appointment access for all patients, especially those who live at a distance, has been shown to be more cost effective when the patients travel is otherwise monetarily compensated, and allows for multiple patient's to be seen in the same time slots, allowing for greater access to the clinic for the patients wishing to be seen in-house. There is also the patient's excitement in being part of a new technology-based program. The Gulf Coast Veterans Health Care System (GCVHCS) saw the potential benefits of incorporating a teletinnitus program and began implementation in 2013. There were a few hurdles to work through during the beginning organizational process and the initial execution of the program. Since the establishment of the Teletinnitus program, the GCVHCS has seen an enhancement in patient care, reduction in travel compensation, improvement in clinic utilization, clinic availability, the genuine excitement of the use of a new healthcare media amongst staff and patients, and overall patient satisfaction.

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