Download or read book A Population Genetic Study of the Zostera Marina eelgrass Ecotypes of Barnegat Bay New Jersey and Implications for Grass Bed Restoration written by Stephanie Marie Smith and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Summary of Eelgrass Zostera Marina Reproductive Biology with an Emphasis on Seed Biology and Ecology from the Chesapeake Bay Region written by Robert Joseph Orth and published by . This book was released on 2007 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Status of Eelgrass Zostera Marina on the North Atlantic Coast February 1938 written by Clarence Cottam and published by . This book was released on 1938 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inventory of Eelgrass Zostera Marina L in San Francisco San Pablo Bay written by Sandy Wyllie-Echeverria and published by . This book was released on 1989 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigating Perennial Annual Eelgrass Zostera Marina L in Padilla Bay as Potential Donor Sources for Seed based Restoration written by Yuki Wilmerding and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Evidence for Low Levels of Genetic Variation Among Zostera Marina Populations from the Atlantic West Coast written by Eric Rosenzweig and published by . This book was released on 2008 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Ecology of Eelgrass Meadows of the Atlantic Coast written by Gordon W. Thayer and published by . This book was released on 1984 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Restoration of Eelgrass Zostera Marina L in Estuarine Environments written by R. S. Alberte and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Long term Changes in Eelgrass Zostera Marina Distribution in Taunton Bay ME written by Tara Goodrich (Mae) and published by . This book was released on 2006 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Isozyme Variability Within Long Island Sound Populations of Eelgrass Zostera Marina written by Joanna V. Tata and published by . This book was released on 1996 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guidelines for the Conservation and Restoration of Seagrasses in the United States and Adjacent Waters written by Mark S. Fonseca and published by . This book was released on 1998 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document presents an overview of the current state of seagrass conservation and restoration in the United States, discusses issues that should be addressed in planning seagrass restoration projects, describes different planting methodologies, proposes monitoring criteria and means for evaluating success, and discusses issues faced by resource managers.

Download or read book Analysis of the Spatial Distribution and Recruitment of Native and Non native Tunicate Species on Zostera Marina in New Jersey written by Sarah Hoffman and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Many tunicate species have invaded the Western North Atlantic coast in the last century. These tunicates can have negative impacts on important industries like shellfish aquaculture, but they also foul natural and anthropogenic surfaces leading to displacement of native communities. During the summer of 2017 and 2018, the spatial distribution and recruitment of tunicate species in Zostera marina (Eelgrass) beds in Barnegat Bay, New Jersey were assessed. Samples were collected during the summer by excavating all eelgrass from a 0.125m2 area. Samples were then assessed for tunicate presence, as well as percent coverage of tunicates. In 2017, Botrylloides violaceus was the most commonly identified species and was found at Barnegat Inlet and Ham Island. Botryllus schlosseri, Didemnum vexillum, and Ascidiella aspersa were also identified, but were less abundant. Tunicate coverage increased substantially at Barnegat Inlet from June to August, but decreased at Ham Island during this period. Didemnum vexillum was only found at Ham Island, while Ascidiella aspersa was only found at Barnegat Inlet. In 2018, a broader survey of Barnegat Bay was done, which included numerous sample sites throughout the bay. Botryllus schlosseri was the most commonly identified species during this larger survey. A regression analysis demonstrated that there was a significant positive relationship between Z. marina biomass and tunicate biomass. This suggests that when there is more seagrass biomass there is more spatial area for colonization and growth of ascidians. However, there was one outlier that showed the potential negative effects of tunicate growth on seagrass. This outlier is evidence of the fact that tunicates can overgrow and kill seagrass. These results suggest that fouling invasive tunicates could have a negative impact on eelgrass communities by smothering blades and reducing plant viability. This research is the first evaluation of invasive tunicates living among the seagrass beds in New Jersey and indicates both spatial and temporal variability in presence and prevalence.

Download or read book Production Ecology of Eelgrass Zostera Marina L and Its Epiphytes in Little Egg Harbor New Jersey written by David Elwyn Vaughan and published by . This book was released on 1982 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Structure of Eelgrass Zostera Marina Within Humboldt Bay California written by Bethany Baibak and published by . This book was released on 2014 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global FST and overall RST values were close to zero implying that the subpopulations in both datasets share many alleles in similar frequency. Pairwise FST comparisons of MRS:ELK and MRS:HBS were slightly significant indicating that there are alleles that are not shared in equal frequency between these subpopulations. Although not statistically significant, some distinctive structure of ELK and MRS was observed in scatterplots in DAPC: this is consistent with their physical isolation within the bay and ecological attributes of each system. In contrast to the lack of structural variability among subpopulations, a large proportion of variability was identified among samples as demonstrated by high levels of clonal richness (R > 0.97), overall heterozygosity (HO = 0.51, HE = 0.53) and allelic richness (5.6 - 7.4). These findings could be due to a combination of plant (e.g., outcrossing) and environmental attributes (e.g., too few generations) that minimize genetic differentiation in the bay. Alternatively, HBN may have lost genetic structure due to disturbances accumulated since 1850 and HBN may be relying on seed dispersal from other areas of the bay, thereby minimizing horizontal genetic structure.

Download or read book A Spatial Model of Eelgrass Zostera Marina Habitat in Humboldt Bay California written by Whelan Gilkerson and published by . This book was released on 2008 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was conducted to model the extent of eelgrass habitat in Humboldt Bay, California through physical surveys of the maximum depths and upper limits of growth in conjunction with recently acquired high-resolution bathymetry data and supplemental imagery. A combination of chronic turbidity, frequent coastal stratus, and wind-waves, make Humboldt Bay a challenging environment to assess subtidal eelgrass (Zostera marina) habitat from remotely-sensed imagery. Additionally, eelgrass and green algae overlap extensively in shallow intertidal areas, confounding efforts to distinguish between habitat types from imagery alone. A relative exposure index (REI) was developed to identify areas of eelgrass habitat that may be prone to disturbance from wind-waves. Approximately 2200 hectares of eelgrass habitat were identified. Accuracy was assessed at 91% for modeled eelgrass habitat in South Humboldt Bay based on a comparison with hyperspectral imagery captured in October, 2004. Modeling the extent of eelgrass habitat represents an important step towards understanding the extent to which future restoration or mitigation may be possible in Humboldt Bay.

Download or read book Reproduction and Adaptation in Eastern Pacific Eelgrass Populations written by Joshua Stephen Neely and published by . This book was released on 2006 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Role of Eelgrass Zostera Marina L Source Population Characteristics in Resilience to Stress and Restoration Success written by Holly K. Bayley and published by . This book was released on 2012 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: