Download or read book Assessing Vegetation Abundance of Spartina Foliosa in a Southern California Salt Marsh Using Remote Sensing written by David H. Van Mouwerik and published by . This book was released on 1993 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Ecology of Southern California Coastal Salt Marshes written by Joy B Zedler and published by . This book was released on 1982 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Restoration Following Sediment Addition in a Southern California Salt Marsh written by Parker Richardson (Graduate student) and published by . This book was released on 2022 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Despite the many ecosystem services they provide, salt marsh habitats have been extensively lost and degraded through anthropogenic activities over the past century. Furthermore, predicted future rates of sea-level rise threaten to eliminate much of the still intact salt marshes, especially in urbanized areas. Techniques to conserve salt marshes in the face of sea-level rise include facilitating the upland migration of the intertidal plant community or adjusting elevation through sediment addition. At this time, however, best practices for implementing these strategies remain poorly understood. In the studies presented here, I quantified the constraints of seed availability and soil salinity on the plant colonization of a southern California salt marsh sediment addition site using a seedling emergence experiment. I also examined the effects of several planting methods (proximity to ponds, plug spacing, and plug species composition) on the assisted upland migration of a low marsh plant species (Spartina foliosa). Finally, I measured the effects of planting on the soil conditions and macrofauna communities over 1 year. Seed bank samples from the sediment addition site had few seedlings emerge compared to natural marsh samples, and seawater irrigation increased mortality of emerged seedlings, pointing to a combination of seed supply and soil salinity limiting the recolonization of plants to the site. Planting Spartina foliosa plugs in clusters with 20 cm spacing near tidal ponds increased S. foliosa survival and growth above its natural elevation range. However, planting showed little effect on the soil conditions and macrofauna assemblage of the sediment addition site after 1 year. The results presented here suggest that salt marsh restoration sites near seed sources can have limited seed availability, and assessments of seed availability can help determine the necessity of active planting. Additionally, these results demonstrate that assisting the upland migration of Spartina foliosa with sea-level rise may be accomplished through strategic planting methods such as planting near ponds. However, the effects of active planting on the restoration trajectory of soil conditions and macrofauna communities may take longer than 1 year to manifest.

Download or read book Production in Coastal Salt Marshes of Southern California written by H. Peter Eilers and published by . This book was released on 1981 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Factors Controlling the Vegetation Dynamics of Spartina Foliosa and Salicornia Virginica in California s Coastal Wetlands written by Joan Lee Brenchley-Jackson and published by . This book was released on 1992 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Starting from Scratch written by Erin L. O'Brien and published by . This book was released on 2003 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book San Francisco Bay Salt Marsh Vegetation Geography and Ecology written by Katherine Lillian Cecilia Cuneo and published by . This book was released on 1987 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Spatial Structure of a California Salt Marsh written by Eric Wayne Sanderson and published by . This book was released on 1998 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Plant Traits Explain Abundance Rank in Salt Marsh Vegetation written by Catherine Louise Bonin and published by . This book was released on 2007 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Salt Marsh Bibliography with an Emphasis on the Salt Marshes of California written by and published by . This book was released on 1991 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Tidal and Soil related Variables on the Growth Morphology and Distribution of the Perennial Salt Marsh Pickleweed Salicornia Virginica L in Southern California Salt Marshes written by Meredith A. Osborne and published by . This book was released on 1994 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impacts of Spatial Resolution and Viewing Angle on Remotely Sensed Estimates of Spartina Alterniflora Aboveground Biomass written by Avery Miller and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Coastal salt marshes sequester large quantities of “blue carbon” in plant biomass and sediments, and provide numerous other valuable ecosystem functions and services. However, these ecosystems are increasingly threatened by external stressors, including rising sea levels and a changing climate, which have resulted in large losses of tidal marsh habitat. Measuring plant biomass is critical for understanding how carbon storage may be affected as stressors continue to cause marsh losses, and for improving conservation and management efforts. A number of studies have quantified aboveground biomass (AGB) in salt marshes using remote sensing techniques, and with the development of high resolution sensors there is excellent potential to improve estimates over large scales. However, few studies have evaluated how variability in spatial resolution and viewing angle across platforms impacts AGB estimates, despite the large range of potential imaging systems available. Using 3 cm and 6 cm resolution nadir hyperspectral drone imagery, and 0.5-3 cm oblique imagery collected from a ground-based camera at three viewing angles from two different-aged barrier island salt marshes in Virginia, USA, I evaluated the accuracy of regression models predicting S. alterniflora AGB from vegetation indices across resolution and viewing angle. The overall best performing linear regression models were obtained using the 3 cm nadir drone imagery. However, the best 6 cm regression models demonstrated only minor losses in accuracy relative to 3 cm. AGB estimates from obliquely angled imagery were less accurate than either nadir resolution. The most accurate oblique models were obtained at the highest viewing angle, with performance decreasing as the viewing angle became shallower. These results suggest that not all platforms perform similarly within salt marsh ecosystems, and that both spatial resolution and viewing angle must be considered in choice of imaging systems."--Abstract.

Download or read book Dynamics of Carbon and Nitrogen in a Southern California Salt Marsh written by Theodore Paul Winfield and published by . This book was released on 1995 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Ecology of Southern California Coastal Salt Marshes written by Joy B. Zedler and published by . This book was released on 1982 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Invasion of Southern California s Coastal Salt Marshes by Exotic Iceplants Aizoaceae written by Eric Forest Zahn and published by . This book was released on 2006 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Variation in Response to a Continuum of Stress and Disturbance in a Salt Marsh Plant Assemblage written by Stuart Keating Allison and published by . This book was released on 1991 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biophysical Remote Sensing of Salt Marshes in South East United States written by Shuvankar Ghosh and published by . This book was released on 2017 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: Study of salt marsh biophysical properties is imperative to understand its response to environmental change. We developed protocols for mapping biophysical properties of salt marshes such as Green Leaf Area Index (GLAI), Canopy Chlorophyll (CHLc), Vegetation Fraction (VF), and aboveground Green Biomass (GBM) using moderate resolution satellite images and in-situ data for the salt marshes in south-eastern United States. The time-series products derived using the biophysical models have been able to capture the spatio-temporal effects of the environmental events affecting the salt marshes of the region. We also tested the performance of different smoothing functions to derive noise-free phenology for Louisiana (LA) and Georgia (GA) salt marshes from the time-series GBM composites, and selected the best smoothing function to derive and analyze phenological parameters for salt marsh habitats. Long-term trend analysis of phenological parameters indicate positive changes in the base GBM values, and mostly negative changes in the GBM amplitude and small seasonal integral, which indicate overall progressive decline in the rates of photosynthesis and biomass allocation in the salt marsh ecosystem. This observed decline in photosynthesis and biomass allocation may be attributed to elevated atmospheric carbon dioxide (CO2) levels and sea level rise. Finally we attempted to map Gross Primary Productivity (GPP) for a salt marsh habitat in the Gulf Coast, using the GBM composites and in-situ GPP estimates from eddy covariance CO2 flux towers. The time-series composites and phenological charts developed using the biophysical GPP model was able to capture the effect of different environmental events such as dieback and hurricane landfall. The results illustrate the relative efficiency of MODIS in analyzing salt marsh biophysical properties. This is the first study to employ MODIS images to study the long-term trends in biophysical characteristics of salt marshes in south-east United States. The methods described in this study as well as the biophysical products derived using the methods has the potential to improve our ability to predict their productivity and carbon sequestration potential. These techniques could also be used to assess the success of previous and ongoing salt marsh restoration projects, and evaluate the productivity of marshes under threat from both natural and anthropogenic drivers.