Impact of Anthropogenic Stressors on Marine Benthos PDF Download
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Author: Mary Miranda
Publisher: GRIN Verlag
ISBN: 3668819181
Category : Science
Languages : en
Pages : 544
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Book Description
Doctoral Thesis / Dissertation from the year 2017 in the subject Biology - Zoology, University of Kerala, language: English, abstract: In Kerala, no scientific research has been done to assess the impact of multiple anthropogenic stressors which is rampant along the southern coast. This thesis explores the kinetics of macroinvertebrates at three anthropogenically disturbed regions, along the coast of Kerala. A near- pristine site, which is supposed to serve as a control, was also included in the present study. A correlation of the spatio-temporal dispensation of the communities with environmental parameters has been attempted. Inventorizing the benthic invertebrate assemblages at the sites exposed to differing pollution load (both in quantity) has revealed some alarming observations which need to be addressed immediately. The study has also brought about the efficacy of biomonitoring coastal ecosystems using benthic assemblages. The study highlights the strong deterministic nature of zoobenthic community and its ability to resist varying anthropogenic disturbances, while identifying new sentinel organisms. Investigating the temporal and spatial parameters of benthic macroinvertebrates and its impacts on trophic levels, determine the fate of energy and nutrient flow into the coastal waters. Estimating secondary production of major taxonomic groups and their value in the food chain, characterizes trophic dynamics within the system.
Author: Mary Miranda
Publisher: GRIN Verlag
ISBN: 3668819181
Category : Science
Languages : en
Pages : 544
Get Book Here
Book Description
Doctoral Thesis / Dissertation from the year 2017 in the subject Biology - Zoology, University of Kerala, language: English, abstract: In Kerala, no scientific research has been done to assess the impact of multiple anthropogenic stressors which is rampant along the southern coast. This thesis explores the kinetics of macroinvertebrates at three anthropogenically disturbed regions, along the coast of Kerala. A near- pristine site, which is supposed to serve as a control, was also included in the present study. A correlation of the spatio-temporal dispensation of the communities with environmental parameters has been attempted. Inventorizing the benthic invertebrate assemblages at the sites exposed to differing pollution load (both in quantity) has revealed some alarming observations which need to be addressed immediately. The study has also brought about the efficacy of biomonitoring coastal ecosystems using benthic assemblages. The study highlights the strong deterministic nature of zoobenthic community and its ability to resist varying anthropogenic disturbances, while identifying new sentinel organisms. Investigating the temporal and spatial parameters of benthic macroinvertebrates and its impacts on trophic levels, determine the fate of energy and nutrient flow into the coastal waters. Estimating secondary production of major taxonomic groups and their value in the food chain, characterizes trophic dynamics within the system.
Author: Martin Solan
Publisher: Oxford University Press
ISBN: 0198718829
Category : Nature
Languages : en
Pages : 381
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Book Description
This summarises the latest advances in the physiological and ecological responses of marine species to a wide range of potential stressors resulting from current anthropogenic activity, and provides a perspective on future outcomes for some of the most pressing environmental issues facing society today.
Author: Emma E. Hodgson
Publisher:
ISBN:
Category :
Languages : en
Pages : 254
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Book Description
Anthropogenic modifications of marine environments result from a variety of activities and have effects across social and ecological dimensions. Humans inhabit linked systems, where our actions such as resource extraction, pollution and development influence species in both direct and indirect ways and feedback to influence the human communities dependent on living marine resources. In order to understand the consequences of our actions and develop strategies to plan for future environmental change, we need a diverse set of tools able to incorporate various levels of complexity. This necessitates the improvement and modification of existing tools, development of novel approaches and unique applications of methods from across fields. In this dissertation I address the ways in which we can use and improve existing tools in ecology to advance our understanding and management of marine resources. In the first Chapter I introduce a method to incorporate life stage specific responses to a stressor, ocean acidification, to gain a broader understanding of population level vulnerability. In the second Chapter I extend this work to address ecosystem level change from ocean acidification in the California Current, using an ecosystem model to determine changes in biomass and fisheries catch. In the third chapter, I work to improve our understanding of how multiple stressors acting across life history can be magnified or mitigated, based solely on biological characteristics of populations. Finally, in the fourth Chapter I introduce ecologists and natural scientists to a broader understanding of research on risk in order to improve our methods for approaching ecosystem based fisheries management. My work spans ecological scales from populations to ecosystems and links between social and ecological systems.
Author: Miha Knehtl
Publisher:
ISBN:
Category :
Languages : en
Pages : 161
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 030916155X
Category : Science
Languages : en
Pages : 200
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Book Description
The ocean has absorbed a significant portion of all human-made carbon dioxide emissions. This benefits human society by moderating the rate of climate change, but also causes unprecedented changes to ocean chemistry. Carbon dioxide taken up by the ocean decreases the pH of the water and leads to a suite of chemical changes collectively known as ocean acidification. The long term consequences of ocean acidification are not known, but are expected to result in changes to many ecosystems and the services they provide to society. Ocean Acidification: A National Strategy to Meet the Challenges of a Changing Ocean reviews the current state of knowledge, explores gaps in understanding, and identifies several key findings. Like climate change, ocean acidification is a growing global problem that will intensify with continued CO2 emissions and has the potential to change marine ecosystems and affect benefits to society. The federal government has taken positive initial steps by developing a national ocean acidification program, but more information is needed to fully understand and address the threat that ocean acidification may pose to marine ecosystems and the services they provide. In addition, a global observation network of chemical and biological sensors is needed to monitor changes in ocean conditions attributable to acidification.
Author: Simon Jungblut
Publisher: Springer Nature
ISBN: 3030203891
Category : Aquatic biology
Languages : en
Pages : 378
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Book Description
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. .
Author: John E. Petersen
Publisher: Springer Science & Business Media
ISBN: 0387767673
Category : Science
Languages : en
Pages : 228
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Book Description
Enclosed ecosystem experiments have gained in popularity as research tools in ecological science, particularly in the study of coastal aquatic environments. These systems provide scientists with a degree of experimental control that is not achievable through field experiments. Yet to date, techniques for systematically extrapolating results from small-scale experimental ecosystems to larger, deeper, more open, more biologically diverse, and more heterogeneous ecosystems in nature have not been well developed. Likewise, researchers have lacked methods for comparing and extrapolating information among natural ecosystems that differ in scale. Enclosed Experimental Ecosystems and Scale: Tools for Understanding and Managing Coastal Ecosystems provides scientists, managers, and policy makers with an introduction to what has been termed the "problem of scale", and presents information that will allow for improved design and interpretation of enclosed experimental aquatic ecosystems. The book integrates the results of a 10-year research project involving a multi-disciplinary team of scientists and students to explore scale-related questions in a variety of coastal habitats. Anticipating use as a reference, the book has been designed so that individual sections and individual pages can function as stand alone units.
Author: Daniel M. Dauer
Publisher:
ISBN:
Category : Benthos
Languages : en
Pages : 65
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Book Description
Benthic macrofauna are an important component of estuarine ecosystems. These organisms are a food source for higher trophic levels including fishes and crabs and birds. Benthic macrofauna affect both the physical and chemical properties of the sediment and the overlying water column, influence nutrient cycling, and are capable of directly controlling phytoplankton biomass in the water column. Because of these characteristics, monitoring of the benthos provides important information for making management decisions in marine systems. Also, the relatively long life span and sedentary nature of these organisms make them good indicators of water quality and the effects of man-made disturbances on aquatic systems. The objective of this study was to develop analytical tools that are capable of classifying regions in Chesapeake Bay identified as having degraded benthic communities into categories distinguished by the type of stress experienced by those communities.
Author: Eric Wolanski
Publisher: Elsevier
ISBN: 0128140046
Category : Science
Languages : en
Pages : 730
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Book Description
Coasts and Estuaries: The Future provides valuable information on how we can protect and maintain natural ecological structures while also allowing estuaries to deliver services that produce societal goods and benefits. These issues are addressed through chapters detailing case studies from estuaries and coastal waters worldwide, presenting a full range of natural variability and human pressures. Following this, a series of chapters written by scientific leaders worldwide synthesizes the problems and offers solutions for specific issues graded within the framework of the socio-economic-environmental mosaic. These include fisheries, climate change, coastal megacities, evolving human-nature interactions, remediation measures, and integrated coastal management. The problems faced by half of the world living near coasts are truly a worldwide challenge as well as an opportunity for scientists to study commonalities and differences and provide solutions. This book is centered around the proposed DAPSI(W)R(M) framework, where drivers of basic human needs requires activities that each produce pressures. The pressures are mechanisms of state change on the natural system and Impacts on societal welfare (including well-being). These problems then require responses, which are the solutions relating to governance, socio-economic and cultural measures (Scharin et al 2016). - Covers estuaries and coastal seas worldwide, integrating their commonality, differences and solutions for sustainability - Includes global case studies from leading worldwide contributors, with accompanying boxes highlighting a synopsis about a particular estuary and coastal sea, making all information easy to find - Presents full color images to aid the reader in a better understanding of details of each case study - Provides a multi-disciplinary approach, linking biology, physics, climate and social sciences
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309052254
Category : Science
Languages : en
Pages : 129
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Book Description
The diversity of marine life is being affected dramatically by fishery operations, chemical pollution and eutrophication, alteration of physical habitat, exotic species invasion, and effects of other human activities. Effective solutions will require an expanded understanding of the patterns and processes that control the diversity of life in the sea. Understanding Marine Biodiversity outlines the current state of our knowledge, and propose research agenda on marine biological diversity. This agenda represents a fundamental change in studying the oceanâ€"emphasizing regional research across a range of space and time scales, enhancing the interface between taxonomy and ecology, and linking oceanographic and ecological approaches. Highlighted with examples and brief case studies, this volume illustrates the depth and breadth of undescribed marine biodiversity, explores critical environmental issues, advocates the use of regionally defined model systems, and identifies a series of key biodiversity research questions. The authors examine the utility of various research approachesâ€"theory and modeling, retrospective analysis, integration of biotic and oceanographic surveysâ€"and review recent advances in molecular genetics, instrumentation, and sampling techniques applicable to the research agenda. Throughout the book the critical role of taxonomy is emphasized. Informative to the scientist and accessible to the policymaker, Understanding Marine Biodiversity will be of specific interest to marine biologists, ecologists, oceanographers, and research administrators, and to government agencies responsible for utilizing, managing, and protecting the oceans.
