Author: Annie WalserPublisher:
ISBN:
Category : Eelgrass
Languages : en
Pages : 142
Book Description
A Study of Pore-water Sulfide and Eelgrass (Zostera Japonica and Zostera Marina) in Padilla Bay, Washington
Author: Annie WalserPublisher:
ISBN:
Category : Eelgrass
Languages : en
Pages : 142
Book Description
Effects of Hypoxia and Sulfide Intrusion on Eelgrass (Zostera Marina)
Author: Melissa CiesielskiPublisher:
ISBN:
Category : Hypoxia (Water)
Languages : en
Pages : 154
Book Description
Comparison of Biomass, Morphology and Reproduction in the Eelgrass Zostera Japonica in Two Substrate Types at Three Elevations in Padilla Bay, Washington
Author: Janet Aile ClarkPublisher:
ISBN:
Category : Seagrasses
Languages : en
Pages : 32
Book Description
Investigating Perennial & Annual Eelgrass (Zostera Marina L.) in Padilla Bay as Potential Donor Sources for Seed-based Restoration
Author: Yuki WilmerdingPublisher:
ISBN:
Category : Ecosystem management
Languages : en
Pages : 0
Book Description
This paper explores recovery of eelgrass (Zostera marina L.) meadows through seed-based restoration to address declines from natural and anthropogenic disturbances. The study focuses on the Joe Leary meadow site in Padilla Bay, Washington, aiming to (1) determine the spatial distribution of perennial and annual Z. marina, (2) understand variation in flowering shoot density and potential seed production, and (3) compare the phenology of flowering shoots. These objectives were investigated using field-based methods to collect presence/absence transect data for delineation, quadrat-based count data, and monitor seed development. Data collection occurred in the summer throughout the flowering life stage of eelgrass in the site. The study found spatial and temporal variation in the distribution, density, and phenology of flowering perennial and annual populations. Delineation methods revealed that annuals have a similar range in the intertidal as perennials, with differences highlighted in response to potential stress indicators such as proximity to the slough, algal mats, or elevation. Quadrat-based monitoring found annual shoots in the transect higher in the intertidal, above the perennial population. Phenology data indicated that perennial shoots flower about a month prior to annual shoots. While the study advises against using perennial flowering shoots for restoration due to low densities, it emphasizes Joe Leary's potential as a donor site for flowering annuals for seed-based restoration. Careful considerations are crucial to avoid unintended introductions of non-native species. The research concludes with recommendations for refining delineation methods, enhancing understanding of eelgrass population dynamics, and optimizing seed collection strategies for genetically diverse and resilient restoration in the face of climate change.
Analysis of the Policies and Management Practices of Washington State Agencies as They Pertain to the Seagrasses, Zostera Marina and Zostera Japonica
Author: Brian T. PawlakPublisher:
ISBN:
Category : Seagrasses
Languages : en
Pages : 40
Book Description
Physiological Factors Affecting the Distribution of the Non-indigenous Seagrass Zostera Japonica Along the Pacific Coast of North America
Author: Deborah Joyce ShaferPublisher:
ISBN:
Category : Alien plants
Languages : en
Pages : 152
Book Description
Analysis of Eelgrass in Padilla Bay, Washington Using an Uncrewed Aerial System
Author: Hannah HeinPublisher:
ISBN:
Category : Eelgrass
Languages : en
Pages : 194
Book Description
Eelgrass is an important part of coastal environments in the Pacific Northwest as it provides crucial habitat and moderates storm surge. Padilla Bay, Washington is home to one of the largest eelgrass meadows in North America and contains the native Zostera marina and the non-native Z. japonica. The relationship between these two species is of interest due to the influx of Z. japonica in previously unvegetated areas. I used an uncrewed aerial system (UAS) and a multispectral camera to study species dynamics. I compared the ability of values derived from the band data, two vegetation indices, and a principal components analysis (PCA) to predict eelgrass cover using pixel- and object-based methods. In the pixel-based analysis, using a red and red edge band in a multiple linear regression was the best way to estimate overall percent cover for the full season (R2 = 0.79). Regressions used to predict Z. marina (R2=0.55) and Z. japonica (R2=0.32) cover individually performed poorly. In the object-based analysis, using band means and standard deviations in a support vector machine (SVM) classification resulted in an overall accuracy of 78.3%. This method performed the best at classifying segments based on dominant species, with user's accuracies for Z. marina and Z. japonica of 80% and 100%, respectively. PCA-informed segmentation and classification also performed well, with an overall accuracy of 70.6%. Conducting object-based image segmentation with the Micasense Dual Camera System and SVM classification may be a promising method for identifying spectral differences between Z. marina and Z. japonica.
Effects of Application of Glyphosate on the Eelgrasses Zostera Marina and Zostera Japonica in Padilla Bay, Washington
Author: Douglas A. BulthuisPublisher:
ISBN:
Category : Dwarf eelgrass
Languages : en
Pages : 45
Book Description
Inventory of Eelgrass (Zostera Marina L.) in San Francisco/San Pablo Bay
Author: Sandy Wyllie-EcheverriaPublisher:
ISBN:
Category : Zostera marina
Languages : en
Pages : 32
Book Description
Status of Eelgrass (Zostera Marina) on the North Atlantic Coast, February 1938
Author: Clarence CottamPublisher:
ISBN:
Category : Zostera marina
Languages : en
Pages : 12
Book Description