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Articles 1 - 4 of 4
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Plant Assemblage Composition Explains And Predicts How Biodiversity Affects Salt Marsh Functioning, Gary Sullivan, John Callaway, Joy B. Zedler
Plant Assemblage Composition Explains And Predicts How Biodiversity Affects Salt Marsh Functioning, Gary Sullivan, John Callaway, Joy B. Zedler
Environmental Science
Knowing that diverse plantings enhanced biomass and nitrogen (N) accumulation in a restored California salt marsh, we asked if the “biodiversity effect” was due to species selection or complementarity. In a two-year greenhouse experiment, we found positive biodiversity effects on total, root, and shoot biomass, total and root N crop, and on biomass and N allocation; negative effects on root and shoot N concentration; and no effect on shoot N crop. Overyielding among trios and sextets was supported by significant deviations in observed yield from that expected relative to solo yields (DT). However, both trios and sextets …
Contrasting Biogeochemistry Of Six Trace Metals During The Rise And Decay Of A Spring Phytoplankton Bloom In San Francisco Bay, Allison C. Luengen, Peter T. Raimondi, A. Russell Flegal
Contrasting Biogeochemistry Of Six Trace Metals During The Rise And Decay Of A Spring Phytoplankton Bloom In San Francisco Bay, Allison C. Luengen, Peter T. Raimondi, A. Russell Flegal
Environmental Science
The spring 2003 phytoplankton bloom in South San Francisco Bay (South Bay) affected the cycling of Mn, Co, Zn, Ni, and Pb, but not Cu. We followed this diatom bloom for 2 months, capturing a peak in chlorophyll a (Chl a) of >150 µg L-1 and then an increase in dissolved organic carbon of >400 µmol L-1 as phytoplankton decomposed. To determine how the stages of the bloom affected metal concentrations, we used principal component analysis to reduce our 15 water chemistry variables into a bloom factor, a sorbent factor, and a decay factor. Increasing values of the …
Investigating The Spring Bloom In San Francisco Bay: Links Between Water Chemistry, Metal Cycling, Mercury Speciation, And Phytoplankton Community Composition, Allison C. Luengen
Investigating The Spring Bloom In San Francisco Bay: Links Between Water Chemistry, Metal Cycling, Mercury Speciation, And Phytoplankton Community Composition, Allison C. Luengen
Environmental Science
Investigating the spring bloom in San Francisco Bay: Links between water chemistry, metal cycling, mercury speciation, and phytoplankton community composition This dissertation addresses the relationship between two problems facing estuaries nationwide: nutrient enrichment and metal contamination. The focus is on the southern reach of San Francisco Bay, where high nutrient concentrations can control the magnitude of the predictably occurring spring phytoplankton bloom. The bloom in this study, in spring 2003, was one of the largest blooms on record, exceeding 150 μg L -1 of chlorophyll α. As the bloom grew, diatoms (e.g. Thalassiosira punctigera ) depleted dissolved nutrients from the …
Fire Behavior Modeling To Assess Net Benefits Of Forest Treatments On Fire Hazard Mitigation And Bioenergy Production In Northeastern California, David J. Ganz, David Saah, Klaus Barber, Mark Nechodom
Fire Behavior Modeling To Assess Net Benefits Of Forest Treatments On Fire Hazard Mitigation And Bioenergy Production In Northeastern California, David J. Ganz, David Saah, Klaus Barber, Mark Nechodom
Environmental Science
The fire behavior modeling described here, conducted as part of the Biomass to Energy (B2E) life cycle assessment, is funded by the California Energy Commission to evaluate the potential net benefits associated with treating and utilizing forest biomass. The B2E project facilitates economic, environmental, energy, and effectiveness assessments of the potential public benefits associated with: (1) various options for treatment, disposition, and utilization of forest biomass and (2) energy production from biomass produced by forest remediation activities. The study models forest conditions, fire behavior and fuel changes over a 40-year period, under three fuel treatment scenarios: no treatment; harvest and …