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Time Series Measurements Of Chlorophyll Fluorescence In The Oceanic Bottom Boundary Layer With A Multisensor Fiber-Optic Fluorometer, Eurico J. Dsa, Steven E. Lohrenz, Vernon L. Asper, Roy A. Walters Aug 1997

Time Series Measurements Of Chlorophyll Fluorescence In The Oceanic Bottom Boundary Layer With A Multisensor Fiber-Optic Fluorometer, Eurico J. Dsa, Steven E. Lohrenz, Vernon L. Asper, Roy A. Walters

Faculty Publications

An in situ multisensor fiber-optic fluorometer (MFF) has been developed to acquire long-term chlorophyll fluorescence measurements in the oceanic bottom boundary layer to characterize the finescale pigment structure at vertical spatial scales comparable to physical measurements. The eight fluorescence sensors of the MFF are composed of dual optical fibers of varying lengths (1.5-8 m), with the fiber ends oriented at 30 degrees to each other and enclosed by a small light baffle. Strobe excitation blue light is passed through one of each pair of optical fibers and stimulated chlorophyll fluorescence is carried back to a photomultiplier. Two sets of four …

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Epidermal Cell Fate And Patterning In Leaves, John C. Larkin, M. David Marks, Jeanette Nadeau, Fred Sack Jul 1997

Epidermal Cell Fate And Patterning In Leaves, John C. Larkin, M. David Marks, Jeanette Nadeau, Fred Sack

Faculty Publications

No abstract provided.

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Antisense Expression Of The Peptide Transport Gene Atptr2-B Delays Flowering And Arrests Seed Development In Transgenic Arabidopsis Plants, Wei Song, Serry Koh, Mihály Czakó, László Márton, Eliana Drenkard, Jeffrey M. Becker, Gary Stacey Jul 1997

Antisense Expression Of The Peptide Transport Gene Atptr2-B Delays Flowering And Arrests Seed Development In Transgenic Arabidopsis Plants, Wei Song, Serry Koh, Mihály Czakó, László Márton, Eliana Drenkard, Jeffrey M. Becker, Gary Stacey

Faculty Publications

Previously, we identified a peptide transport gene, AtPTRZ-B, from Arabidopsis thaliana that was constitutively expressed in all plant organs, suggesting an important physiological role in plant growth and development. To evaluate the function of this transporter, transgenic Arabidopsis plants were constructed expressing antisense or sense AtPTRZ-B. Genomic Southern analysis indicated that four independent antisense and three independent sense AtPTRZ-B transgenic lines were obtained, which was confirmed by analysis of the segregation of the kanamycin resistance gene carried on the T-DNA. RNA blot data showed that the endogenous AtPJRZ-B mRNA levels were significantly reduced in transgenic leaves and …

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Carboxymethylethanolamine, A Biomarker Of Phospholipid Modification During The Maillard Reaction In Vivo, Jesus R. Requena, Mahtab U. Ahmed, C. Wesley Fountain, Thorsten P. Degenhardt, Sharanya Reddy, Cliff Perez, Timothy J. Lyons, Alicia J. Jenkins, John W. Baynes, Suzanne R. Thorpe May 1997

Carboxymethylethanolamine, A Biomarker Of Phospholipid Modification During The Maillard Reaction In Vivo, Jesus R. Requena, Mahtab U. Ahmed, C. Wesley Fountain, Thorsten P. Degenhardt, Sharanya Reddy, Cliff Perez, Timothy J. Lyons, Alicia J. Jenkins, John W. Baynes, Suzanne R. Thorpe

Faculty Publications

Nepsilon-(Carboxymethyl)lysine (CML) is a stable chemical modification of proteins formed from both carbohydrates and lipids during autoxidation reactions. We hypothesized that carboxymethyl lipids such as (carboxymethyl)phosphatidylethanolamine (carboxymethyl-PE) would also be formed in these reactions, and we therefore developed a gas chromatography-mass spectrometry assay for quantification of carboxymethylethanolamine (CME) following hydrolysis of phospholipids. In vitro, CME was formed during glycation of dioleoyl-PE under air and from linoleoylpalmitoyl-PE, but not from dioleoyl-PE, in the absence of glucose. In vivo, CME was detected in lipid extracts of red blood cell membranes, approximately 0.14 mmol of CME/mol of ethanolamine, from control and diabetic subjects, …

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Twin Hydroxymethyluracil-A Base Pair Steps Define The Binding Site For The Dna-Bending Protein Tf1, Anne Grove, Marxa L. Figueiredo, Aldo Galeone, Luciano Mayol, E. Peter Geiduschek May 1997

Twin Hydroxymethyluracil-A Base Pair Steps Define The Binding Site For The Dna-Bending Protein Tf1, Anne Grove, Marxa L. Figueiredo, Aldo Galeone, Luciano Mayol, E. Peter Geiduschek

Faculty Publications

The DNA-bending protein TF1 is the Bacillus subtilis bacteriophage SPO1- encoded homolog of the bacterial HU proteins and the Escherichia coli integration host factor. We recently proposed that TF1, which binds with high affinity (K(d) was ~3 nM) to preferred sites within the hydroxymethyluracil (hmU)-containing phage genome, identifies its binding sites based on sequence-dependent DNA flexibility. Here, we show that two hmU-A base pair steps coinciding with two previously proposed sites of DNA distortion are critical for complex formation. The affinity of TF1 is reduced 10-fold when both of these hmU-A base pair steps are replaced with A-hmU, G-C, or …

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Grand Canonical Monte Carlo And Modified Singlet Integral Equations For The Density Profile Of A Yukawa Fluid Near A Planar Wall, Douglas Henderson, Wilmer Olivares-Rivas, Leo Degreve, Jacqueline Quintana May 1997

Grand Canonical Monte Carlo And Modified Singlet Integral Equations For The Density Profile Of A Yukawa Fluid Near A Planar Wall, Douglas Henderson, Wilmer Olivares-Rivas, Leo Degreve, Jacqueline Quintana

Faculty Publications

Results for the density profile for Yukawa molecules near a hard wall and an exponential attractive wall are presented for Grand Canonical Monte Carlo (GCMC) simulations, for the singlet hypernetted chain (HNC) integral equation and for a modified version of the Lovett–Mou–Buff–Wertheim (LMBW-1) which uses the exact contact value theorem. The results of the standard singlet HNC are quite poor. If the LMBW equation is modified (but still using the bulk direct correlation function) the results at high temperature become reasonable. However, the results at low temperatures, close to the bulk coexistence curve, are only a partial improvement. The contact …

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Intraspecific And Diffuse Competition: The Response Of Nassella Pulchra In A California Grassland, Andrew R. Dyer, Kevin J. Rice May 1997

Intraspecific And Diffuse Competition: The Response Of Nassella Pulchra In A California Grassland, Andrew R. Dyer, Kevin J. Rice

Faculty Publications

In inland California grasslands, the high densities of alien annual species have altered the growing environment for native perennial grasses. Using variable-density plots, we measured the influence of intraspecific competition (conspecifics only) and diffuse competition (mixed-composition neighborhoods that include conspecifics) on growth and survival of Nassella pulchra, purple needlegrass. We assessed the effects of intraspecific and diffuse competition in weeded plots and unweeded plots, respectively, across a density gradient of N. pulchra plants (16–356 plants/m2). We used summer fire and spring sheep grazing to reduce diffuse competition in unweeded plots. The potential effect of rooting volume on competitive interactions …

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The Angiotensin Converting Enzyme And Blood Pressure In Jamaicans, Terrence Forrester, Norma Mcfarlane-Anderson, Franklyn I. Bennett, Rainford Wilks, Richard Cooper, Charles Rotimi, Linda Morrison, Ryk Ward May 1997

The Angiotensin Converting Enzyme And Blood Pressure In Jamaicans, Terrence Forrester, Norma Mcfarlane-Anderson, Franklyn I. Bennett, Rainford Wilks, Richard Cooper, Charles Rotimi, Linda Morrison, Ryk Ward

Faculty Publications

An insertion/deletion (I/D) polymorphism of the angiotensin I converting enzyme gene influences the level of serum angiotensin converting enzyme activity and has been associated with risk of several cardiovascular conditions. The relationship to blood pressure remains uncertain, however. We conducted a population-based survey in Kingston, Jamaica, to examine the association between angiotensin converting enzyme genotype, angiotensin converting enzyme serum activity and blood pressure. Serum angiotensin converting enzyme activity was measured and genotyping performed for the I/D polymorphism in 500 community residents. The overall prevalence of the D allele was 59.3%. Angiotensin converting enzyme genotype was not significantly related to blood …

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234Th And 210Pb Evidence For Rapid Ingestion Of Settling Particles By Mobile Epibenthic Megafauna In The Abyssal Ne Pacific, L. M. L. Lauerman, J. M. Smoak, Timothy J. Shaw, W. S. Moore, K. L. Smith Jr. May 1997

234Th And 210Pb Evidence For Rapid Ingestion Of Settling Particles By Mobile Epibenthic Megafauna In The Abyssal Ne Pacific, L. M. L. Lauerman, J. M. Smoak, Timothy J. Shaw, W. S. Moore, K. L. Smith Jr.

Faculty Publications

No abstract provided.

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The Probability Density Function Of Ocean Surface Slopes And Its Effects On Radar Backscatter, Y. Liu, Xh Yan, W.T. Liu, P.A. Hwang May 1997

The Probability Density Function Of Ocean Surface Slopes And Its Effects On Radar Backscatter, Y. Liu, Xh Yan, W.T. Liu, P.A. Hwang

Faculty Publications

Based on Longuet-Higgins's theory of the probability distribution of wave amplitude and wave period and on some observations, a new probability density function (PDF) of ocean surface slopes is derived. It is f(zeta(x), zeta(y)) = n/2 pi(n - 1)sigma(u) sigma(c) x [1 + zeta(x)(2)/(n - 1)sigma(n)(2) + zeta(y)(2)/(n - 1)sigma(c)(2)](-(n + 2)/2) + skewness, where zeta(x) and zeta(y) are the slope components in upwind and crosswind directions, respectively; sigma(u)(2) and sigma(c)(2) are the corresponding mean-square slopes. The peakedness of slopes is generated by nonlinear wave-wave interactions in the range of gravity waves. The skewness of slopes is generated by nonlinear …

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Paying For Suffering: The Problem Of Human Experimentation, Larry I. Palmer Apr 1997

Paying For Suffering: The Problem Of Human Experimentation, Larry I. Palmer

Faculty Publications

No abstract provided.

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Review Of Roman Catholics And Evangelicals, By Norman L. Geisler And Ralph E. Mackenzie, Denis Fortin Apr 1997

Review Of Roman Catholics And Evangelicals, By Norman L. Geisler And Ralph E. Mackenzie, Denis Fortin

Faculty Publications

No abstract provided.

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Substitutions At Position 146 Of Cytochrome B Affect Drastically The Properties Of Heme B(L) And The Q(O) Site Of Rhodobacter Capsulatus Cytochrome Bc1 Complex, A. Sami Saribaş, Huangen Ding, P. Leslie Dutton, Fevzi Daldal Mar 1997

Substitutions At Position 146 Of Cytochrome B Affect Drastically The Properties Of Heme B(L) And The Q(O) Site Of Rhodobacter Capsulatus Cytochrome Bc1 Complex, A. Sami Saribaş, Huangen Ding, P. Leslie Dutton, Fevzi Daldal

Faculty Publications

The cytochrome (cyt) b subunit of ubihydroquinone: cytochrome c oxidoreductase(bc1 complex) contains four invariant glycine (G) residues proposed to be essential for proper packing of the high and low potential (b(H) and b(L)) hemes of the bc1 complex. One of these residues, G146 located in the transmembrane helix C of cyt b of Rhodobacter capsulatus, was substituted with A and V using site-directed mutagenesis, and the effects of these substitutions on the properties of the ubiquinone oxidation (Q(o)) site and heme b(L) of the bc1 complex were analyzed. The mutants G146A and V produced properly assembled but catalytically defective bc1 …

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Native And Multimeric Vitronectin Exhibit Similar Affinity For Heparin: Differences In Heparin Binding Properties Induced Upon Denaturation Are Due To Self-Association Into A Multivalent Form, Ping Zhuang, Anthony I. Chen, Cynthia B. Peterson Mar 1997

Native And Multimeric Vitronectin Exhibit Similar Affinity For Heparin: Differences In Heparin Binding Properties Induced Upon Denaturation Are Due To Self-Association Into A Multivalent Form, Ping Zhuang, Anthony I. Chen, Cynthia B. Peterson

Faculty Publications

For many years, the concept that the heparin-binding sequence is sequestered within vitronectin and exposed upon denaturation of the protein has guided experimental design and interpretation of related structure- function studies on the protein. To evaluate binding of heparin to both native and denatured/renatured vitronectin, methods for monitoring binding in solution have been developed. A fluorescence method based on changes in an extrinsic probe attached to heparin has been used to evaluate heparin binding to native and denatured/renatured vitronectin. This approach indicates that there are not major differences in intrinsic heparin-binding affinities between native and renatured protein and invalidate the …

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Wetland Loss In The Northern Gulf Of Mexico: Multiple Working Hypotheses, R. Eugene Turner Mar 1997

Wetland Loss In The Northern Gulf Of Mexico: Multiple Working Hypotheses, R. Eugene Turner

Faculty Publications

I examined four hypotheses about causes for the dramatically high coastal wetland losses (0.86% yr−1) in the northern Gulf of Mexico: an extensive dredged canal and spoil bank network, a decline in sediments in the Mississippi River during the 1950s, Mississippi River navigation and flood protection levees, and salinity changes. Natural factors contributing to these habitat changes include eustatic sea-level rise and geological compaction, which appear to have remained relatively constant this century, although variation does occur. These four hypotheses were tested using data on land-to-water changes in 15-min quadrangle maps inventoried for four intervals between the 1930s and 1990. …

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The Use Of Fluorescent Probes To Characterize Conformational Changes In The Interaction Between Vitronectin And Plasminogen Activator Inhibitor-1, Angelia Gibson, Kunnumal Baburaj, Duane E. Day, Ingrid Verhamme, Joseph D. Shore, Cynthia B. Peterson Feb 1997

The Use Of Fluorescent Probes To Characterize Conformational Changes In The Interaction Between Vitronectin And Plasminogen Activator Inhibitor-1, Angelia Gibson, Kunnumal Baburaj, Duane E. Day, Ingrid Verhamme, Joseph D. Shore, Cynthia B. Peterson

Faculty Publications

Plasminogen activator inhibitor-1 (PAI-1), the primary inhibitor of tissue-type plasminogen activator and urokinase, is known to convert readily to a latent form by insertion of the reactive center loop into a central β- sheet. Interaction with vitronectin stabilizes PAI-1 and decreases the rate of conversion to the latent form, but conformational effects of vitronectin on the reactive center loop of PAI-1 have not been documented. Mutant forms of PAI-1 were designed with a cysteine substitution at either position P1' or P9 of the reactive center loop. Labeling of the unique cysteine with a sulfhydryl-reactive fluorophore provides a probe that is …

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The Law Of Above Averages: Leveling The New Genetic Enhancement Playing Field, Maxwell J. Mehlman Feb 1997

The Law Of Above Averages: Leveling The New Genetic Enhancement Playing Field, Maxwell J. Mehlman

Faculty Publications

In this article, I will explore some of the legal implications of this emerging technology-the technology of genetic enhancement. Specifically, I will discuss how the law might respond to two related consequences: an increase in social inequality, and the

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Organizational Configurations And Performance: A Meta-Analysis, David J. Ketchen Jr., James G. Combs, Craig J. Russell, Chris Shook, Michelle A. Dean, Janet Runge, Franz T. Lohrke, Stefanie E. Naumann, Dawn Ebe Haptonstahl, Robert Baker, Brendon Beckstein, Charles Handler, Heather Honig, Stephen Lamoureux Feb 1997

Organizational Configurations And Performance: A Meta-Analysis, David J. Ketchen Jr., James G. Combs, Craig J. Russell, Chris Shook, Michelle A. Dean, Janet Runge, Franz T. Lohrke, Stefanie E. Naumann, Dawn Ebe Haptonstahl, Robert Baker, Brendon Beckstein, Charles Handler, Heather Honig, Stephen Lamoureux

Faculty Publications

The link between organizational configurations and performance has become a central and somewhat controversial focus of research in the strategic management literature, We statistically aggregated results from 40 original tests of the configurations-performance relationship. In contrast to previous qualitative reviews, this meta-analysis demonstrated that an organization's performance is partially explained by its configuration. Tests of four potential moderators showed that organizations' configurations contributed more to performance explanation to the extent that studies used (1) broad definitions of configurations, (2) single-industry samples, and (3) longitudinal designs, Results highlight the need for programmatic research.

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Tumor Necrosis Factor-Α-Induced Insulin Resistance In 3t3-L1 Adipocytes Is Accompanied By A Loss Of Insulin Receptor Substrate-1 And Glut4 Expression Without A Loss Of Insulin Receptor-Mediated Signal Transduction, Jacqueline M. Stephens, Jongsoon Lee, Paul F. Pilch Jan 1997

Tumor Necrosis Factor-Α-Induced Insulin Resistance In 3t3-L1 Adipocytes Is Accompanied By A Loss Of Insulin Receptor Substrate-1 And Glut4 Expression Without A Loss Of Insulin Receptor-Mediated Signal Transduction, Jacqueline M. Stephens, Jongsoon Lee, Paul F. Pilch

Faculty Publications

A number of studies have demonstrated that tumor necrosis factor-α (TNF-α) is associated with profound insulin resistance in adipocytes and may also play a critical role in the insulin resistance of obesity and non- insulin-dependent diabetes mellitus. Reports on the mechanism of TNF-α action have been somewhat contradictory. GLUT4 down-regulation has been implicated as a possible cause of insulin resistance as has been the reduced kinase function of the insulin receptor. Here we examine the effects of tumor necrosis factor on the protein components thought to be involved in insulin- stimulated glucose transport in adipocytes, namely the insulin receptor, its …

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A Transcription-Dependent Switch Controls Competence Of Adult Neurons For Distinct Modes Of Axon Growth, Deanna S. Smith, J.H. Pate Skene Jan 1997

A Transcription-Dependent Switch Controls Competence Of Adult Neurons For Distinct Modes Of Axon Growth, Deanna S. Smith, J.H. Pate Skene

Faculty Publications

Although maturing neurons undergo a precipitous decline in the expression of genes associated with developmental axon growth, structural changes in axon arbors occur in the adult nervous system under both normal and pathological conditions. Furthermore, some neurons support extensive regrowth of long axons after nerve injury. Analysis of adult dorsal root ganglion (DRG) neurons in culture now shows that competence for distinct types of axon growth depends on different patterns of gene expression. In the absence of ongoing transcription, newly isolated neurons can extend compact, highly branched arbors during the first day in culture. Neurons subjected to peripheral axon injury …

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The Ethics Of Judicial Decision-Making Regarding Custody Of Minor Children: Looking At The Best Interests Of The Child" And The "Primary Caretaker" Standards As Utility Rules, Kathryn Mercer Jan 1997

The Ethics Of Judicial Decision-Making Regarding Custody Of Minor Children: Looking At The Best Interests Of The Child" And The "Primary Caretaker" Standards As Utility Rules, Kathryn Mercer

Faculty Publications

This article will examine how a judge's ethical framework can influence the outcome of a custody award, even where the same "child-centered" standard is ostensibly being used. This article uses three cases from the Supreme Court of Nebraska to demonstrate that the "best interests of the child" standard can be used: 1) to award a parent custody because parents have near absolute rights (an example of rule deontology); 2) to deny a parent custody because the par ent is unfit (an example of rule utilitarianism); or 3) to deny a parent custody because the child's life needs stability (an example …

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Conidial Germination And Infection By Diplocarpon Rosae On Susceptible And Resistant Rose Species, Robert J. Wiggers, J. G. West, Josephine Taylor Jan 1997

Conidial Germination And Infection By Diplocarpon Rosae On Susceptible And Resistant Rose Species, Robert J. Wiggers, J. G. West, Josephine Taylor

Faculty Publications

Conidial germination and infection by Dipplocarpon rosae, the causal organism of rose blackspot, were examined on two resistant species of roses, Rosa roxburghii and R. wichuraiana and two susceptible hybrid tea roses (R. hybrid cv. Chicago Peace and Garden Party). Fungal conidia germinated and gave rise to subcuticular mycelium that formed haustoria within epidermal cells of all four roses tested. On the resistant rose species, epidermal cells associated with the infection site became necrotic, indicating that a hypersensitive response is involved in conferring their resistance D. rosae.

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Responses To Prey Odors In Juveniles Of The Snake Elaphe Obsoleta Spiloides, A Predatory Generalist [Abstract], Stephen J. Mullin, William H. N. Gutzke Jan 1997

Responses To Prey Odors In Juveniles Of The Snake Elaphe Obsoleta Spiloides, A Predatory Generalist [Abstract], Stephen J. Mullin, William H. N. Gutzke

Faculty Publications

No abstract provided.

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Sodium Nitrite Alone Protects The Brain O _I_ Microsomal Ca -Atpase Against Potassium Cyanide-Induced Neurotoxicity In Rats, Odutayo O. Odunuge, G.. A. Adenuga Jan 1997

Sodium Nitrite Alone Protects The Brain O _I_ Microsomal Ca -Atpase Against Potassium Cyanide-Induced Neurotoxicity In Rats, Odutayo O. Odunuge, G.. A. Adenuga

Faculty Publications

The effect of a short-term oral administration of potassium cyanide (KCN) (200 ppm in diet) with or without sodium nitrite (NaNO2) pretreatment on rat brain microsomal Ca2* ATPase was investigated. The specific activity value of the enzyme significantly decreased (p<0.05) by 50% compared with control and by 63% for KCN-treated rats compared with KCN-treated rats pretreated with NaNO;,. There was no significant difference at the h = 0.05 level between the values obtained for the control and KCN-treated rats pretreated with NaNO,. These results show both that feeding lowers brain microsomal Ca2f-ATPase activity and that NaNO, has a protective role (antidote function) in that respect.

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Stand Conditions And Tree Characteristics Affect Quality Of Longleaf Pine For Red-Cockaded Woodpecker Cavity Trees, W. G. Ross, David Kulhavy, Richard N. Conner Jan 1997

Stand Conditions And Tree Characteristics Affect Quality Of Longleaf Pine For Red-Cockaded Woodpecker Cavity Trees, W. G. Ross, David Kulhavy, Richard N. Conner

Faculty Publications

We measured resin flow of longleaf (Pirzus palustris Mill.) pines in red-cockaded woodpecker (Picoides borealis Vieillot) clusters in the Angelina National Forest in Texas, and the Apalachicola National Forest in Florida. Sample trees were categorized as active cavity trees, inactive cavity trees and control trees. Sample trees were further categorized by stand position as either edge or interior trees. Longleaf cavity trees in Texas and Florida had similar resin flow characteristics. Active cavity trees on forest edges had the highest resin flow, whereas active cavity trees in forest interiors had the lowest. Trees experiencing both low and high levels of …

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The Red-Cockaded Woodpecker's Role In The Southern Pine Ecosystem, Population Trends And Relationships With Southern Pine Beetles, Richard N. Conner, D. Craig Rudolph, Daniel Saenz, Robert N. Coulson Jan 1997

The Red-Cockaded Woodpecker's Role In The Southern Pine Ecosystem, Population Trends And Relationships With Southern Pine Beetles, Richard N. Conner, D. Craig Rudolph, Daniel Saenz, Robert N. Coulson

Faculty Publications

This study reviews the overall ecological role of the Red-cockaded Woodpecker (Picoides borealis)in the southern pine ecosystem. It is the only North American woodpecker species to become well adapted to a landscape that was relatively devoid of the substrate typically used by woodpeckers for cavity excavation (i.e. snags and decayed, living hardwoods). Its adaptation to use living pines for cavity excavation has expanded the use of this fire-disclimax ecosystem for numerous other cavity-using species. As such, the Red-cockaded Woodpecker represents an important keystone species of fire-disclimax pine ecosystems of the South. Historically, populations of this woodpecker and other cavity dependent …

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Species Using Red-Cockaded Woodpecker Cavities In Eastern Texas, Richard N. Conner, D. Craig Rudolph, Daniel Saenz, Richard R. Schaefer Jan 1997

Species Using Red-Cockaded Woodpecker Cavities In Eastern Texas, Richard N. Conner, D. Craig Rudolph, Daniel Saenz, Richard R. Schaefer

Faculty Publications

Because of its ability to excavate cavities in living pines, the Red-cockaded Woodpecker (Picoides borealis) is a keystone species in the fire-disclimax, pine ecosystems of the southeastern United States. Many species representing multiple taxonomic classes are dependent on this woodpecker species for the cavities it creates. We examined the occupants of Red-cockaded Woodpecker cavities during spring, late summer, and winter. Cavities enlarged by other species of woodpeckers and unenlarged cavities were examined in two habitat conditions: loblolly (Pinus taeda) -shortleaf (P. echinata) pine and longleaf pine (P. palustris) habitats. Red-cockaded Woodpecker cavities provided cavity habitat for seven species of birds, …

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Grounds For Argument: Local Understandings, Science, And Global Processes In Special Forest Products Harvesting, Thomas Love, Eric Jones Jan 1997

Grounds For Argument: Local Understandings, Science, And Global Processes In Special Forest Products Harvesting, Thomas Love, Eric Jones

Faculty Publications

In posing the question "Where are the pickers?", Love and Jones suggest that the shifting paradigm in forestry is real and that academia is not leading the shift. Love and Jones illustrate the emergence of special forest products' legitimacy in competing uses of forests with their experience and research in mushroom harvesting in the Pacific Northwest.

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Impacts Of Climate Change On Net Productivity Of Coastal Waters: Implications For Carbon Budgets And Hypoxia, D Justic, N N. Rabalais, R. Eugene Turner Jan 1997

Impacts Of Climate Change On Net Productivity Of Coastal Waters: Implications For Carbon Budgets And Hypoxia, D Justic, N N. Rabalais, R. Eugene Turner

Faculty Publications

General circulation models predict that freshwater discharge from the Mississippi River (USA) to the coastal ocean would increase 20 % if atmospheric CO2 concentration doubles. Here we use a coupled physical-biological 2-box model to investigate the potential impacts of increased freshwater and nutrient inputs on the production and decay of organic matter in the coastal waters of the northern Gulf of Mexico. Model results for a doubled CO2 climate indicate that the annual net productivity of the upper water column (NP, 0 to 10 m) is likely to increase by 65 g C m(-2) yr(-1), relative to a 1985-1992 average …

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Abundance And Vertical Flux Of Pseudo-Nitzschia In The Northern Gulf Of Mexico, Q Dortch, R Robichaux, S Pool, D Milsted, Q Dortch, N N. Rabalais, T M. Soniat, G A. Fryxell, R. Eugene Turner, M L. Parsons Jan 1997

Abundance And Vertical Flux Of Pseudo-Nitzschia In The Northern Gulf Of Mexico, Q Dortch, R Robichaux, S Pool, D Milsted, Q Dortch, N N. Rabalais, T M. Soniat, G A. Fryxell, R. Eugene Turner, M L. Parsons

Faculty Publications

Many species of the ubiquitous pennate diatom genus Pseudo-nitzschia have recently been discovered to produce domoic acid, a potent neurotoxin which causes Amnesic Shellfish Poisoning (ASP). Pseudo-nitzschia spp. were extremely abundant (up to 10(8) cells l(-1); present in 67% of 2195 samples) from 1990 to 1994 on the Louisiana and Texas, USA, continental shelves and moderately abundant (up to 10(5) cells l(-1); present in 18% of 192 samples) over oyster beds in the Terrebonne Bay estuary in Louisiana in 1993 and 1994. On the shelf there was a strong seasonal cycle with maxima every spring for 5 yr and sometimes …

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