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Nearshore Fish Assemblage Patterns With Respect To Landscape Scale Habitats In Central California
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Book Synopsis Nearshore Fish Assemblage Patterns with Respect to Landscape-scale Habitats in Central California by : Kristin I. Hunter-Thomson
Download or read book Nearshore Fish Assemblage Patterns with Respect to Landscape-scale Habitats in Central California written by Kristin I. Hunter-Thomson and published by . This book was released on 2011 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: In most ecosystems, the distribution of species across a landscape is greatly influenced by the type, amount, and spatial configuration of habitats. Studies in terrestrial environments have shown that species diversity, density, and length frequency often positively correlate with the size of a habitat patch, patch shape, and proximity to a patch edge. These patterns, however, have not been conclusively shown in temperate sub-tidal marine studies. Data from visual strip-transects collected from the Delta submersible were used to characterize fish assemblages with respect to rocky bank habitat patches. Specifically, the density, diversity, and length frequency of nearshore fishes were examined with respect to 1) proximity to the patch edge, 2) patch shape, and 3) patch size near Point Lobos and Point Sur, California. Diversity and length distributions of fishes were significantly greater at the edge than the interior of rocky bank patches. Therefore, landscape-scale patterns with respect to the distribution of nearshore fishes exist. However, this study also demonstrated that terrestrial paradigms are not directly applicable to temperate sub-tidal marine habitats. The relationship between species richness and patch shape was opposite of patterns observed in terrestrial systems. Additionally, patch size explained more of the variability in the nearshore fish assemblages than patch shape; however, neither were good predictive indicators of the density of fishes.
Book Synopsis Ecosystems of California by : Harold Mooney
Download or read book Ecosystems of California written by Harold Mooney and published by Univ of California Press. This book was released on 2016-01-19 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt: This long-anticipated reference and sourcebook for CaliforniaÕs remarkable ecological abundance provides an integrated assessment of each major ecosystem typeÑits distribution, structure, function, and management. A comprehensive synthesis of our knowledge about this biologically diverse state, Ecosystems of California covers the state from oceans to mountaintops using multiple lenses: past and present, flora and fauna, aquatic and terrestrial, natural and managed. Each chapter evaluates natural processes for a specific ecosystem, describes drivers of change, and discusses how that ecosystem may be altered in the future. This book also explores the drivers of CaliforniaÕs ecological patterns and the history of the stateÕs various ecosystems, outlining how the challenges of climate change and invasive species and opportunities for regulation and stewardship could potentially affect the stateÕs ecosystems. The text explicitly incorporates both human impacts and conservation and restoration efforts and shows how ecosystems support human well-being. Edited by two esteemed ecosystem ecologists and with overviews by leading experts on each ecosystem, this definitive work will be indispensable for natural resource management and conservation professionals as well as for undergraduate or graduate students of CaliforniaÕs environment and curious naturalists.
Author :Australian Government - Department of the Environment and Heritage - Environment Australia Publisher : ISBN 13 :9780642549495 Total Pages :20 pages Book Rating :4.5/5 (494 download)
Book Synopsis The Benefits of Marine Protected Areas by : Australian Government - Department of the Environment and Heritage - Environment Australia
Download or read book The Benefits of Marine Protected Areas written by Australian Government - Department of the Environment and Heritage - Environment Australia and published by . This book was released on 2003 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of Assemblage Structure, Abundance, and Year-class Strength to Assess Fish Assemblage Responses to Water Level Fluctuations by : Hannah Marie Holmquist
Download or read book Use of Assemblage Structure, Abundance, and Year-class Strength to Assess Fish Assemblage Responses to Water Level Fluctuations written by Hannah Marie Holmquist and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water level fluctuations can influence lateral connectivity of a water body; during high water levels, fish gain access to off-channel and floodplain habitats that can provide refuge for smaller fish and provide access to abundant aquatic and terrestrial prey. Water level dynamics play a critical role in ecosystem productivity and can have varying effects on biota. Modifications to water flow in Buttonland Swamp, located near the headwaters of the Lower Cache River in southern Illinois, were put in place to improve drainage and restore historical water levels; however, these alterations have disrupted the natural hydrologic dynamics and flood pulse processes, which could influence fish assemblage dynamics. The fish assemblage in Buttonland Swamp was sampled using electrofishing, fyke nets, and mini fyke nets during 2020 and 2021 to evaluate effects of water level dynamics on fish abundance, assemblage structure, and year-class strength. Random stratified sampling was used to select sampling sites each month. Four macrohabitats (Cache River channel, Buttonland Swamp main channel, side channels, and Eagle Pond) within the swamp were surveyed monthly. Open water, nearshore vegetated, and offshore vegetated habitats within each of the macrohabitats were also surveyed. The first chapter of this study evaluated whether assemblage structure and abundance of fishes in Buttonland Swamp differed across seasons, years (using historic data), and habitats over varying water levels and assessed associations between particular species (especially species of conservation concern) and habitats across seasons, years, and water levels. Each gear was analyzed separately, although electrofishing most effectively sampled all habitats, so analyses of fish assemblage structure across seasons, habitats, and years only used electrofishing data. Non-metric multidimensional scaling (NMDS) and analysis of similarities (ANOSIM) were used to evaluate spatiotemporal patterns in assemblage structure in relation to water level. Indicator Species Analysis (ISA) was used to identify prominent species among habitats, seasons, years (using historical data from Illinois Department of Natural Resources (IDNR) sampling in Buttonland Swamp), and datasets (from IDNR and SIU sampling). Repeated measures using mixed models were used to distinguish significant differences in catch per unit effort (CPUE) (catch per minute using electrofishing; catch per net night for fyke nets and mini fyke nets) among macrohabitats, microhabitats, and seasons. There was a significant difference in assemblage structure among macrohabitats, microhabitats, years, and seasons; however, the R-value was so low among macrohabitats and years that the significant P-values were disregarded since this could have been by chance since the sample size was large. Microhabitats had significantly different assemblage structures, with Silver Carp, Shortnose Gar, Threadfin Shad, and Gizzard Shad being associated with open water, whereas Taillight Shiner, Orangespotted Sunfish, Golden Shiner, Largemouth Bass, Redear Sunfish, Bluegill, Warmouth, Black Crappie, and Smallmouth Buffalo were associated with vegetated habitats. Using IDNR data, there were no significant differences in assemblage structure among years, although there was a significant difference in assemblage structure between the IDNR and SIU data; species that were associated with vegetated habitat were associated with IDNR data, whereas SIU data were more associated with species that were associated with open water. Additionally, some microhabitats and macrohabitats had significant differences in assemblage structure among seasons. ISA had similar results to NMDS and ANOSIM, but also showed prominent species for macrohabitats and years. Additionally, depending on the gear used, CPUE was significantly different among macrohabitats, microhabitats, and seasons. Species that were associated with vegetated habitats may be more impacted by water level fluctuations because at very low water levels these species may have less shallow water vegetated habitat to utilize or may be left stranded as the water level recedes. The second chapter assessed associations between historic water level data, air temperature data, and historical catch per unit effort (CPUE) data of predator and competitor fish species from Buttonland Swamp with year-class strength indices of Silver Carp, Bluegill, and Gizzard Shad to evaluate relationships between hydrology, temperature, and other species interactions with fish recruitment. Random stratified sampling was used to select sixteen electrofishing transects each month during September through November 2020 and 2021. Among fish collected, a subsample of Bluegill, Gizzard Shad, and Silver Carp were aged by otolith and cleithra annuli counts. An age-length key was developed to assign ages to unaged fish. Year-class strength indices were determined using the residual method from catch curve regressions. Bluegill and Gizzard Shad had weak year-class strength in 2017, which coincided with a low average water level that year. Water level during fall and spawning was positively associated with year-class strength for Bluegill and Gizzard Shad. Gizzard Shad and Bluegill year-class strength was positively associated with minimum winter temperature. Bluegill and Gizzard Shad year-class strength had a negative association with catch per unit effort (CPUE) of Common Carp and Largemouth Bass. Other predator and competitor fish species CPUE were also significantly associated with year-class strength of Bluegill, Gizzard Shad, and Silver Carp. Only a few age-classes of Silver Carp were caught, representing a boom and bust pattern of recruitment. Since Silver Carp could have migrated into the study area, Buttonland Swamp water level may not be an important factor influencing year-class strength of this species. Water level, along with other abiotic and biotic factors, appear to be influencing year-class strength of fishes within Buttonland Swamp. High water level throughout the year, especially from May-June and October-December, was associated with strong year-class strength of Bluegill and Gizzard Shad. Additionally, maintaining high water level in the winter could allow for deep water refuges for cold intolerant fishes to avoid winter mortality and maintain their abundance. This information contributes to both understand and management of hydrologically impaired systems and can also facilitate future assessments of how current and future hydrologic management regimes will affect the fish community.
Book Synopsis Biotic Homogenization by : Julie L. Lockwood
Download or read book Biotic Homogenization written by Julie L. Lockwood and published by Springer Science & Business Media. This book was released on 2001-05-31 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological homogenization is the dominant process shaping the future global biosphere. As global transportation becomes faster and more frequent, it is inevitable that biotic intermixing will increase. Unique local biotas will become extinct only to be replaced by already widespread biotas that can tolerate human activities. This process is affecting all aspects of our world: language, economies, and ecosystems alike. The ultimate outcome is the loss of uniqueness and the growth of uniformity. In this way, fast food restaurants exist in Moscow and Java Sparrows breed on Hawaii. Biological homogenization qualifies as a global environmental catastrophe. The Earth has never witnessed such a broad and complete reorganization of species distributions.
Book Synopsis Quaternary Coral Reef Systems by : Lucien F. Montaggioni
Download or read book Quaternary Coral Reef Systems written by Lucien F. Montaggioni and published by Elsevier. This book was released on 2009-08-13 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents both state-of-the art knowledge from Recent coral reefs (1.8 million to a few centuries old) gained since the eighties, and introduces geologists, oceanographers and environmentalists to sedimentological and paleoecological studies of an ecosystem encompassing some of the world's richest biodiversity. Scleractinian reefs first appeared about 300 million years ago. Today coral reef systems provide some of the most sensitive gauges of environmental change, expressing the complex interplay of chemical, physical, geological and biological factors. The topics covered will include the evolutionary history of reef systems and some of the main reef builders since the Cenozoic, the effects of biological and environmental forces on the zonation of reef systems and the distribution of reef organisms and on reef community dynamics through time, changes in the geometry, anatomy and stratigraphy of reef bodies and systems in relation to changes in sea level and tectonics, the distribution patterns of sedimentary (framework or detrital) facies in relation to those of biological communities, the modes and rates of reef accretion (progradation, aggradation versus backstepping; coral growth versus reef growth), the hydrodynamic forces controlling water circulation through reef structures and their relationship to early diagenetic processes, the major diagenetic processes affecting reef bodies through time (replacement and diddolution, dolomitization, phosphatogenesis), and the record of climate change by both individual coral colonies and reef systems over the Quaternary. * state-of-the-art knowledge from Recent corals reefs* introduction to sedimentological and paleoecological studies of an ecosystems encompassing some of the world's richest biodiversity.* authors are internationally regarded authorities on the subject* trustworthy information
Book Synopsis Assemblage and Diet of Native and Non-native Nearshore Fishes in a Restoring Wetland in the Northern Sacramento-San Joaquin Delta, California by : Kate Lisbeth Olsen
Download or read book Assemblage and Diet of Native and Non-native Nearshore Fishes in a Restoring Wetland in the Northern Sacramento-San Joaquin Delta, California written by Kate Lisbeth Olsen and published by . This book was released on 2009 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Linkages in the Landscape by : Andrew F. Bennett
Download or read book Linkages in the Landscape written by Andrew F. Bennett and published by IUCN. This book was released on 2003 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: The loss and fragmentation of natural habitats is one of the major issues in wildlife management and conservation. Habitat "corridors" are sometimes proposed as an important element within a conservation strategy. Examples are given of corridors both as pathways and as habitats in their own right. Includes detailed reviews of principles relevant to the design and management of corridors, their place in regional approaches to conservation planning, and recommendations for research and management.
Book Synopsis Ecological Comparisons of Sedimentary Shores by : K. Reise
Download or read book Ecological Comparisons of Sedimentary Shores written by K. Reise and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sedimentary coasts with their unique forms of life and productive ecosystems are one of the most threatened parts of the biosphere. This volume analyzes and compares ecological structures and processes at sandy beaches, tidal mudflats and in shallow coastal waters all around the world. Analyses of local processes are paired with comparisons between distant shores, across latitudinal gradients or between separate biogeographic provinces. Emphasis is given to suspension feeders in coastal mud and sand, to biogenic stabilizations and disturbances in coastal sediments, to seagrass beds and faunal assemblages across latitudes and oceans, to recovery dynamics in benthic communities, shorebird predation, and to experimental approaches to the biota of sedimentary shores.
Book Synopsis Small-scale Analysis of Fish and Habitat Relationships Off Central California by : Jeffrey Michael Field
Download or read book Small-scale Analysis of Fish and Habitat Relationships Off Central California written by Jeffrey Michael Field and published by . This book was released on 2005 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Ecology of Marine Fishes by : Dr. Larry G. Allen
Download or read book The Ecology of Marine Fishes written by Dr. Larry G. Allen and published by Univ of California Press. This book was released on 2006-02-15 with total page 1353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine fishes have been intensively studied, and some of the fundamental ideas in the science of marine ecology have emerged from the body of knowledge derived from this diverse group of organisms. This unique, authoritative, and accessible reference, compiled by 35 luminary ecologists, evolutionary biologists, and ichthyologists, provides a synthesis and interpretation of the large, often daunting, body of information on the ecology of marine fishes. The focus is on the fauna of the eastern Pacific, especially the fishes of the California coast, a group among the most diverse and best studied of all marine ecosystems. A generously illustrated and comprehensive source of information, this volume will also be an important launching pad for future research and will shed new light on the study of marine fish ecology worldwide. The contributors touch on many fields in biology, including physiology, development, genetics, behavior, ecology, and evolution. The book includes sections on the history of research, both published and unpublished data, sections on collecting techniques, and references to important earlier studies.
Book Synopsis Landscape Influences on Stream Habitats and Biological Assemblages by : Robert M. Hughes
Download or read book Landscape Influences on Stream Habitats and Biological Assemblages written by Robert M. Hughes and published by . This book was released on 2006 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Linkages among landscape and associated physiochemical and biological characteristics of rivers are explored in the proceedings of a symposium, organized to foster communication among researchers, resource managers, and policy makers in landscape ecology, geographical information systems, and other related fields.
Book Synopsis Ecological Connectivity among Tropical Coastal Ecosystems by : Ivan Nagelkerken
Download or read book Ecological Connectivity among Tropical Coastal Ecosystems written by Ivan Nagelkerken and published by Springer Science & Business Media. This book was released on 2009-09-23 with total page 617 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mangrove forests, seagrass beds, and coral reefs are circumtropical ecosystems that are highly productive, and provide many important biological functions and economic services. These ecosystems cover large surface areas in the shallow tropical coastal seascape but have suffered from serious human degradation, especially in the last few decades. Part of their diversity, productivity, and functioning seems to be based on their juxtaposition. Especially in the last decade significant advances have been made on new insights into their ecological connectivity. This authoritative book provides a first-time comprehensive review of the major ecological interactions across tropical marine ecosystems that result from the mutual exchange of nutrients, organic matter, fish, and crustaceans. A group of leading authors from around the world reviews the patterns and underlying mechanisms of important biogeochemical and biological linkages among tropical coastal ecosystems in 15 chapters. Included are chapters that review cutting-edge tools to study and quantify these linkages, the importance of such linkages for fisheries, and how tropical ecosystems should be conserved and managed for sustainable use by future generations. The book uses examples from all over the world and provides an up-to-date review of the latest published literature. This book is a ‘must read’ for professionals working on the conservation, management, and ecology of mangrove, seagrass and coral reef ecosystems.
Book Synopsis ADVANCES IN UNDERSTANDING LANDSCAPE INFLUENCES ON FRESHWATER HABITATS AND BIOLOGICAL ASSEMBLAGES. by :
Download or read book ADVANCES IN UNDERSTANDING LANDSCAPE INFLUENCES ON FRESHWATER HABITATS AND BIOLOGICAL ASSEMBLAGES. written by and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Trawling and Dredging on Seafloor Habitat by : National Research Council
Download or read book Effects of Trawling and Dredging on Seafloor Habitat written by National Research Council and published by National Academies Press. This book was released on 2002-08-09 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concerns over the potential ecological effects of fishing have increased with the expansion of fisheries throughout the marine waters of the United States. Effects of Trawling and Dredging on Seafloor Habitat describes how assessment of fishing impacts depends on gear type, number and location of bottom tows, and the physical and biological characteristics of seafloor habitats. Many experimental studies have documented acute, gear-specific effects of trawling and dredging on various types of habitat. These studies indicate that low mobility, long-lived species are more vulnerable to towed fishing gear than short-lived species in areas where the seabed is often disturbed by natural phenomena. Trawling and dredging may also change the composition and productivity of fish communities dependent on seafloor habitats for food and refuge. The scale of these impacts depends on the level of fishing effort. This volume presents color maps of fishing effort for all regions with significant bottom trawl or dredge fisheries-the first time that such data has been assembled and analyzed for the entire nation.
Author :William S. Leet Publisher :University Of California, Division of Agriculture and Natural Resources; Califorinia Sea Grant ISBN 13 :9781879906570 Total Pages :596 pages Book Rating :4.9/5 (65 download)
Book Synopsis California's Living Marine Resources by : William S. Leet
Download or read book California's Living Marine Resources written by William S. Leet and published by University Of California, Division of Agriculture and Natural Resources; Califorinia Sea Grant. This book was released on 2001 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 592-page spiral-bound reference provides a baseline of information for all those involved with managing living marine resources in California and chronicles changes that have occurred in many of the state’s fisheries. Organized by marine ecosystems: bays and estuaries, nearshore and offshore. Includes illustrated species descriptions with details of biological knowledge, fishery history, landings data, population status and references. Also includes sections on marine birds and mammals and appendices containing management considerations (by species), a glossary of technical terms and acronyms and fishing gear illustrations. Jointly produced by the California Sea Grant Extension Program and the California Department of Fish and Game following the passage of the Marine Life Protection Act in January 1999.
Book Synopsis Biology of Skates by : David A. Ebert
Download or read book Biology of Skates written by David A. Ebert and published by Springer Science & Business Media. This book was released on 2008-12-25 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Skates have become a concern in recent years due to the preponderance of these elasmobranchs that are caught as bycatch or as a directed fishery. This has raised concern because skates have life history characteristics that may make them vulnerable to over-exploitation. It was due to this concern that prompted Drs. David Ebert and James Sulikowski to organize an international symposium on the “Biology of Skates”. The aims and goals of the symposium were to bring together an international group of researchers to meet, discuss, perhaps develop collaborations, and present their most recent findings. The symposium was held over two days, on 13-14 July, 2006, in conjunction with the 22nd annual meeting of the American Elasmobranch Society in New Orleans, LA. A total of 31 authors from four countries contributed 16 papers that appear in this volume. The papers are broadly arranged into four separate categories: systematics and biogeography, diet and feeding ecology, reproductive biology, and age and growth. This is the first dedicated book on the biology of skates. We hope that readers will find this volume of interest and that it helps encourage and stimulate future research into these fascinating fishes.
