Download or read book Effects of Application of Glyphosate During Summer on Epiphytes of the Eelgrasses Zostera Marina and Zostera Japonica in Padilla Bay Washington written by Douglas A. Bulthuis and published by . This book was released on 1994 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Application of Glyphosate on the Eelgrasses Zostera Marina and Zostera Japonica in Padilla Bay Washington written by Douglas A. Bulthuis and published by . This book was released on 1993 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coastal Habitats in Padilla Bay Washington written by Douglas A. Bulthuis and published by . This book was released on 1996 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Potential Impact of Agricultural Pesticide Runoff on Zostera Marina and Zostera Japonica eelgrass Communities in Padilla Bay Washington written by J. Richard Mayer and published by . This book was released on 1989 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Ecological Consequences of Genetic Diversity in Eelgrass Zostera Marina written by Anne Randall Hughes and published by . This book was released on 2006 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Application of Glyphosate on Cordgrass Spartina Alterniflora and Adjacent Native Salt Marsh Vegetation in Padilla Bay Washington written by Douglas A. Bulthuis and published by . This book was released on 1993 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impacts of Copper Contamination and Habitat Degradation on Eelgrass Zostera Marina Mesograzers written by and published by . This book was released on 2019 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exposure of contaminants in coastal areas has been on the rise with increasing urbanization of natural environments. These contaminants are known to effect organisms in multiple ways, such as directly increasing mortality, or indirectly altering many of their behaviors, such as sensing predators and foraging. Since seagrass habitats are heavily influenced by anthropogenic factors, organisms found in these ecosystems often experience constant exposure to non-degradable contaminants such as heavy metals. Eelgrass (Zostera marina) persistence is promoted by mesograzers (small crustaceans and gastropods) that control competing epiphytic algae growing on seagrass blades. Along with nutrient levels, this top-down control of a dominant competitor (algae) plays a substantial role in dictating eelgrass health, particularly at high levels of eelgrass structural complexity. However, mesograzers can be negatively affected by contaminants at high levels. I conducted a manipulative field experiment on epifaunal colonization of eelgrass in San Diego Bay, and a companion lab experiment on epifaunal grazing, to determine how epiphytic algae, the mesograzer community, and rates of herbivory are interactively affected by dissolved copper and habitat structural complexity. In the field, copper spiked plaster blocks and artificial seagrass units were used to create realistic pulse events of contamination for two levels of habitat structural complexity. I found that the abundance of epiphytic algae decreased with increasing copper, but that copper had no effect on epifaunal abundance or diversity, which responded strongly only to habitat structural complexity. In the lab experiment, I found complex interactive effects of copper concentration and habitat complexity on grass shrimp grazing rates. Low elevated levels of copper resulted in higher grazing in low complexity vs. high complexity eelgrass, in contrast to trends in ambient and high levels of copper as well as in previous experiments. In both low and high structural complexity eelgrass, grass shrimp grazing impact was highest when copper was elevated compared to ambient levels. In order to set effective regulations, understanding both the direct and indirect interactions between organisms and their environment is key in conserving and managing eelgrass habitat.

Download or read book Effects of Eelgrass Zostera Marina Habitat Fragmentation on the Epifaunal Community in San Diego Bay USA written by Danielle Healey and published by . This book was released on 2005 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Eelgrass Zostera Marina Habitat Loss on Epifaunal Abundance and Diversity written by Brendan J. Reed and published by . This book was released on 2005 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Marine Algae written by Leonel Pereira and published by CRC Press. This book was released on 2014-09-26 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is divided into three thematic areas. The first covers a revision of the taxonomy of algae, based on the algae portal, as well as the general aspects of biology and the methodologies used in this branch of marine biology. The second subject area focuses on the use of algae in environmental assessment, with an intensive implementation in Western economies and some emerging economies. The third topic is the potential use of algae in various industries including food, pharmaceuticals, cosmetics, agricultural fertilizers, and the emerging biofuels industries.

Download or read book Effectiveness of a Wiper Application of Glyphosate on Spartina Alterniflora in Padilla Bay Washington written by Sharon R. Riggs and published by . This book was released on 1995 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nitrogen Dynamics of Eelgrass Zostera Marina During a Late Summer Period of High Growth and Low Nutrient Availability written by Morten Foldager Pedersen and published by . This book was released on 1992 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book World Atlas of Seagrasses written by Frederick T. Short and published by Univ of California Press. This book was released on 2003 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seagrasses are a vital and widespread but often overlooked coastal marine habitat. This volume provides a global survey of their distribution and conservation status.

Download or read book The Effects of Mesograzer Biodiversity and Seagrass Structural Complexity on Eelgrass Ecosystem Function written by and published by . This book was released on 2016 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: A central theory of community ecology is that increased biodiversity results in greater ecosystem function and stability. Many experiments have examined biodiversity-ecosystem function (BEF) relationships at the primary producer level, yet BEF relationships are equally pertinent at higher trophic levels. In seagrass ecosystems, mesograzers (small invertebrate herbivores) promote seagrass persistence by consuming competitively superior epiphytic algae that foul seagrass blades. Experiments in seagrass habitat suggest that mesograzer diversity is a primary driver of top-down control of epiphytic algae, but also that the relationship is temporally and spatially variable. The primary hypothesis of my study is that much of this variability may be due to differences in seagrass habitat structure through time and space. I worked in eelgrass (Zostera marina) habitat in San Diego Bay, California, USA, to test whether variability in eelgrass structural complexity (shoot density) affects relationships between mesograzer biodiversity and ecosystem function (grazing impact and secondary production). I also examined the functional roles of numerically dominant eelgrass epifauna, using a laboratory experiment and stable isotope analysis. Contrary to BEF theory, increased grazer diversity in laboratory mesocosms resulted in decreased grazing impact and facilitation of algal growth. Though some species combinations resulted in increased algal grazing, antagonistic relationships among the most influential grazing taxa resulted in reduced ecosystem function. Structural complexity promoted mesograzer top-down control of epiphytes, increased mesograzer secondary production, and altered epifaunal community composition. Effects of biodiversity and structural complexity on grazing corresponded to variability in diet and feeding behavior among dominant epifaunal taxa. My results demonstrate the importance of examining species-specific interactions when considering links between community structure and ecosystem function, and that environmental context, such as habitat structure, may have large effects on BEF relationships.

Download or read book Yvain written by Chretien de Troyes and published by Yale University Press. This book was released on 1987-09-10 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: A twelfth-century poem by the creator of the Arthurian romance describes the courageous exploits and triumphs of a brave lord who tries to win back his deserted wife's love

Download or read book Chemical Biomarkers in Aquatic Ecosystems written by Thomas S. Bianchi and published by Princeton University Press. This book was released on 2011-02-28 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook provides a unique and thorough look at the application of chemical biomarkers to aquatic ecosystems. Defining a chemical biomarker as a compound that can be linked to particular sources of organic matter identified in the sediment record, the book indicates that the application of these biomarkers for an understanding of aquatic ecosystems consists of a biogeochemical approach that has been quite successful but underused. This book offers a wide-ranging guide to the broad diversity of these chemical biomarkers, is the first to be structured around the compounds themselves, and examines them in a connected and comprehensive way. This timely book is appropriate for advanced undergraduate and graduate students seeking training in this area; researchers in biochemistry, organic geochemistry, and biogeochemistry; researchers working on aspects of organic cycling in aquatic ecosystems; and paleoceanographers, petroleum geologists, and ecologists. Provides a guide to the broad diversity of chemical biomarkers in aquatic environments The first textbook to be structured around the compounds themselves Describes the structure, biochemical synthesis, analysis, and reactivity of each class of biomarkers Offers a selection of relevant applications to aquatic systems, including lakes, rivers, estuaries, oceans, and paleoenvironments Demonstrates the utility of using organic molecules as tracers of processes occurring in aquatic ecosystems, both modern and ancient

Download or read book Wetland and Stream Rapid Assessments written by John Dorney and published by Academic Press. This book was released on 2018-08-07 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wetland and Stream Rapid Assessments: Development, Validation, and Application describes the scientific and environmental policy background for rapid wetland and stream assessments, how such assessment methods are developed and statistically verified, and how they can be used in environmental decision-making—including wetland and stream permitting. In addition, it provides several case studies of method development and use in various parts of the world. Readers will find guidance on developing and testing such methods, along with examples of how these methods have been used in various programs across North America. Rapid wetland and stream functional assessments are becoming frequently used methods in federal, state and local environmental permitting programs in North America. Many governments are interested in developing new methods or improving existing methods for their own jurisdictions. This book provides an ideal guide to these initiatives. Offers guidance for the use and evaluation of rapid assessments to developers and users of these methods, as well as students of wetland and stream quality Contains contributions from sources who are successful in academia, industry and government, bringing credibility and relevance to the content Includes a statistically-based approach to testing the validity of the rapid method, which is very important to the usefulness and defensibility of assessment methods