Download or read book The Impact of Submarine Groundwater Discharge on Nutrient Dynamics in a Sub polar Mudflat written by Josianne Haag and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Submarine groundwater discharge (SGD) plays a major role in the hydrological and biogeochemical cycles controlling nearshore nutrient availability. The Northern Gulf of Alaska coastline is highly diverse, ranging from rocky beaches, sandy beaches, and mudflats; SGD varies according to sediment permeability, strength of wave pumping, and slope of the water table. SGD has been previously estimated at a rocky beach in the NGA, but this thesis sought to quantity SGD in an extensive mudflat using well-established tracers (radium and radon) and determine the major sources of nutrients to the bay. The rate of SGD was comparable between the mudflat and rocky beach (233 ± 245 and 260 ± 360 cm day−1, respectively), and both locations were significant sources of nitrate and silicic acid, and sinks of phosphate. Offshore water also provides a major input of nitrate and phosphate to the bay. Thus, there is no single dominant source for all macronutrients, consequently, multiple processes must be considered when predicting nutrient cycling.

Download or read book The Role of Submarine Groundwater Discharge as Material Source to the Baltic Sea written by Beata Szymczycha and published by Springer. This book was released on 2015-11-27 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides a review of experimental methods and presents the worldwide newest literature regarding chemical substances fluxes via submarine groundwater discharge (SGD). Thus, the book characterizes both the distribution of chemicals in groundwater impacted areas in the Baltic Sea and their fluxes via SGD to the Baltic Sea. This book presents the state of art regarding the SGD and detailed studies on SGD characterization in the Baltic Sea. The Baltic Sea is an example of a region highly influenced by a variety of human activities that affect the ecosystem. It is shown that SGD has been proven to be one of the important sources introducing dissolved substances into the Baltic Sea. The loads of chemical substances delivered to the Baltic sea with SGD have not been quantified so far.

Download or read book Reactive Transport Modeling of Biogeochemical Dynamics in Subterranean Estuaries written by C. Spiteri and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impact of Flux Residence Time and Nutrient Load of Submarine Groundwater Discharge on Coastal Phytoplankton Growth in Coastal Waters of Hawai i written by Kayla D. Holleman and published by . This book was released on 2011 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Submarine groundwater discharge (SGD) is an important land-to-ocean pathway for biogeochemically significant nutrients, such as nitrate, silicate and phosphate. Introduction of new bioavailable nutrients from SGD into coastal waters can alter a coastal system's nutrient balance, and may result in increases in phytoplankton or macroalgae growth that in turn can cause other ecological shifts in biological species' composition (Valiela et al., 1990). In order to attempt a first investigation of the possible relative impact(s) of the amount, flux, and residence times of SGD and SGD-derived nutrients on coastal phytoplankton in the oligotrophic coastal waters off Hawaii, detailed studies were completed to compare the flux and residence times of SGD and SGD-derived nutrients on biological processes at three sites on the leeward-side of the Koolau Mountains along the southern shore of Oahu (the Ala Wai Canal, Black Point, and Wailupe Beach) and at one site on the leeward-side of Hualalai, on the western side of the Big Island of Hawaii (Honokohau Harbor, Hawaii). At each site, radon and short-lived radium isotopes were used to calculate the flux of SGD and SGD-derived constituents into the coastal areas and their residence times. The rate of uptake of 13C by photoautotrophs was determined using in situ incubation experiments with addition of 13C-labeled bicarbonate at most sites and was used as a relative indicator of photosynthetic activity and its response to potential input of SGD-derived nutrients At study sites along the southern shore of Oahu, nutrient fluxes for a shoreline length of 1.18 km was 281 PO43−, 113,015 Si(OH)4, and 10,505 NO3− mol/d, respectively. Nutrient fluxes for Honokohau Harbor, estimated to have a 375-m wide seepage face, were 194 PO43−, 31,998 Si(OH)4, and 3,123 NO3− mol/d respectively. Photosynthetic carbon production rates were significantly higher for the Ala Wai Canal (1.39 [micro]gC/L/h) than for Honokohau Harbor (0.10[micro]gC/L/h). Using these carbon uptake rates and assuming a Redfield C:N:P ratio of 106:16:1, nitrogen and phosphorus uptake rates for both the Ala Wai Canal and Honokohau Harbor were less than 2% of the nutrients delivered by SGD. Variation in the N:P ratios observed in the groundwater and coastal waters could imply nutrient limitation. We found for the restricted estuarine-like embayments of the Ala Wai canal (water mass residence time 10-13 days) and Honokohau Harbor (water mass residence time 0.5 -6 days), that primary productivity is not controlled by the availability of nutrients (nutrient supply> phytoplankton demand in both settings), but is nonetheless directly linked to each water mass' residence time. As nutrients are in excess of demand in both settings, we conclude that it is the physical longevity and residence time of the phytoplankton itself that ultimately controls each basin's ultimate level of sustained primary productivity.

Download or read book Submarine Groundwater Discharge and Associated Nutrient Fluxes to the Corpus Christi Bay System written by J. A. Breier and published by . This book was released on 2003 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Submarine Groundwater Discharge Impacts on Coastal Ecosystem by Hidden Water and Dissolved Materials written by Makoto Taniguchi and published by Frontiers Media SA. This book was released on 2021-03-03 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book YOUMARES 9 the Oceans Our Research Our Future written by Simon Jungblut and published by Springer Nature. This book was released on 2020-01-01 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book summarizes peer-reviewed articles and the abstracts of oral and poster presentations given during the YOUMARES 9 conference which took place in Oldenburg, Germany, in September 2018. The aims of this book are to summarize state-of-the-art knowledge in marine sciences and to inspire scientists of all career stages in the development of further research. These conferences are organized by and for young marine researchers. Qualified early-career researchers, who moderated topical sessions during the conference, contributed literature reviews on specific topics within their research field. .

Download or read book Treatise on Estuarine and Coastal Science written by and published by Academic Press. This book was released on 2012-03-06 with total page 4604 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of estuaries and coasts has seen enormous growth in recent years, since changes in these areas have a large effect on the food chain, as well as on the physics and chemistry of the ocean. As the coasts and river banks around the world become more densely populated, the pressure on these ecosystems intensifies, putting a new focus on environmental, socio-economic and policy issues. Written by a team of international expert scientists, under the guidance of Chief Editors Eric Wolanski and Donald McClusky, the Treatise on Estuarine and Coastal Science, Ten Volume Set examines topics in depth, and aims to provide a comprehensive scientific resource for all professionals and students in the area of estuarine and coastal science Most up-to-date reference for system-based coastal and estuarine science and management, from the inland watershed to the ocean shelf Chief editors have assembled a world-class team of volume editors and contributing authors Approach focuses on the physical, biological, chemistry, ecosystem, human, ecological and economics processes, to show how to best use multidisciplinary science to ensure earth's sustainability Provides a comprehensive scientific resource for all professionals and students in the area of estuarine and coastal science Features up-to-date chapters covering a full range of topics

Download or read book The Regional Impacts of Climate Change written by Intergovernmental Panel on Climate Change. Working Group II. and published by Cambridge University Press. This book was released on 1998 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cambridge, UK : Cambridge University Press, 1998.

Download or read book Biogeochemical Dynamics at Major River Coastal Interfaces written by Thomas Bianchi and published by Cambridge University Press. This book was released on 2014 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive, state-of-the-art synthesis of biogeochemical dynamics and the impact of human alterations at major river-coastal interfaces for advanced students and researchers.

Download or read book The Arctic in the Anthropocene written by National Research Council and published by National Academies Press. This book was released on 2014-07-31 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Once ice-bound, difficult to access, and largely ignored by the rest of the world, the Arctic is now front and center in the midst of many important questions facing the world today. Our daily weather, what we eat, and coastal flooding are all interconnected with the future of the Arctic. The year 2012 was an astounding year for Arctic change. The summer sea ice volume smashed previous records, losing approximately 75 percent of its value since 1980 and half of its areal coverage. Multiple records were also broken when 97 percent of Greenland's surface experienced melt conditions in 2012, the largest melt extent in the satellite era. Receding ice caps in Arctic Canada are now exposing land surfaces that have been continuously ice covered for more than 40,000 years. What happens in the Arctic has far-reaching implications around the world. Loss of snow and ice exacerbates climate change and is the largest contributor to expected global sea level rise during the next century. Ten percent of the world's fish catches comes from Arctic and sub-Arctic waters. The U.S. Geological Survey estimated that up to 13 percent of the world's remaining oil reserves are in the Arctic. The geologic history of the Arctic may hold vital clues about massive volcanic eruptions and the consequent release of massive amount of coal fly ash that is thought to have caused mass extinctions in the distant past. How will these changes affect the rest of Earth? What research should we invest in to best understand this previously hidden land, manage impacts of change on Arctic communities, and cooperate with researchers from other nations? The Arctic in the Anthropocene reviews research questions previously identified by Arctic researchers, and then highlights the new questions that have emerged in the wake of and expectation of further rapid Arctic change, as well as new capabilities to address them. This report is meant to guide future directions in U.S. Arctic research so that research is targeted on critical scientific and societal questions and conducted as effectively as possible. The Arctic in the Anthropocene identifies both a disciplinary and a cross-cutting research strategy for the next 10 to 20 years, and evaluates infrastructure needs and collaboration opportunities. The climate, biology, and society in the Arctic are changing in rapid, complex, and interactive ways. Understanding the Arctic system has never been more critical; thus, Arctic research has never been more important. This report will be a resource for institutions, funders, policy makers, and students. Written in an engaging style, The Arctic in the Anthropocene paints a picture of one of the last unknown places on this planet, and communicates the excitement and importance of the discoveries and challenges that lie ahead.

Download or read book The Ocean and Cryosphere in a Changing Climate written by Intergovernmental Panel on Climate Change (IPCC) and published by Cambridge University Press. This book was released on 2022-04-30 with total page 755 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Intergovernmental Panel on Climate Change (IPCC) is the leading international body for assessing the science related to climate change. It provides policymakers with regular assessments of the scientific basis of human-induced climate change, its impacts and future risks, and options for adaptation and mitigation. This IPCC Special Report on the Ocean and Cryosphere in a Changing Climate is the most comprehensive and up-to-date assessment of the observed and projected changes to the ocean and cryosphere and their associated impacts and risks, with a focus on resilience, risk management response options, and adaptation measures, considering both their potential and limitations. It brings together knowledge on physical and biogeochemical changes, the interplay with ecosystem changes, and the implications for human communities. It serves policymakers, decision makers, stakeholders, and all interested parties with unbiased, up-to-date, policy-relevant information. This title is also available as Open Access on Cambridge Core.

Download or read book Nutrient Criteria Technical Guidance Manual written by and published by . This book was released on 2000 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Protecting the Oceans from Land based Activities written by and published by . This book was released on 2001 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Perspectives on Integrated Coastal Zone Management written by Wim Salomons and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: All coastal areas are facing a growing range of stresses and shocks, the scale of which now poses threats to the resilience of both human and environmental coastal systems. Responsible agencies are seeking better ways of managing the causes and consequences of the environmental change process in coastal zones. This volume discusses the basic principles underpinning a more integrated approach to coastal management and highlights the obstacles that may be met in practice in both developed and developing countries. Successful strategies will have to encompass all the elements of management, from planning and design through financing and implementation, as highlighted in this book.

Download or read book Guidelines for Applying Protected Area Management Categories written by Nigel Dudley and published by IUCN. This book was released on 2008 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: IUCN's Protected Areas Management Categories, which classify protected areas according to their management objectives, are today accepted as the benchmark for defining, recording, and classifying protected areas. They are recognized by international bodies such as the United Nations as well as many national governments. As a result, they are increasingly being incorporated into government legislation. These guidelines provide as much clarity as possible regarding the meaning and application of the Categories. They describe the definition of the Categories and discuss application in particular biomes and management approaches.

Download or read book Mitigating Shore Erosion Along Sheltered Coasts written by National Research Council and published by National Academies Press. This book was released on 2007-05-04 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Like ocean beaches, sheltered coastal areas experience land loss from erosion and sea level rise. In response, property owners often install hard structures such as bulkheads as a way to prevent further erosion, but these structures cause changes in the coastal environment that alter landscapes, reduce public access and recreational opportunities, diminish natural habitats, and harm species that depend on these habitats for shelter and food. Mitigating Shore Erosion Along Sheltered Coasts recommends coastal planning efforts and permitting policies to encourage landowners to use erosion control alternatives that help retain the natural features of coastal shorelines.