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  • 1
    Online Resource
    Online Resource
    Burlington :Elsevier Science & Technology,
    Keywords: Riparian areas--Management. ; Electronic books.
    Description / Table of Contents: This book describes the underlying water conditions and geologies that support viable riparia, illustrates the ecological characteristics of riparia, and discusses how riparia are used by human cultures as well as how riparia can be used to sustain environmental quality. In recent years riparian management has been widely implemented as a means of improving fisheries, water quality, and habitat for endangered species. This book provides the basic knowledge necessary to implement successful, long-term management and rehabilitation programs. * Treats riparian patterns & processes in a holistic perspective, from ecological components to societal activities * Contains over 130 illustrations and photos that summarize this complex ecological system * Synthesizes the information from more than 6,000 professional articles * Sidebars provide a look into ongoing research that is at the frontiers of riparian ecology and management.
    Type of Medium: Online Resource
    Pages: 1 online resource (445 pages)
    Edition: 1st ed.
    ISBN: 9780080470689
    Series Statement: Aquatic Ecology
    DDC: 577.68
    Language: English
    Note: Intro -- Foreword -- Preface -- 1 Introduction -- Overview -- Purpose -- Hydrological Context -- Ecological Context -- Landscape Context -- Cultural Setting -- Rationale for Riparian Ecology -- Setting the Stage -- 2 Catchments and the Physical Template -- Overview -- Purpose -- Catchments and Hierarchical Patterns of Geomorphic Features -- Catchment Form and Channel Networks -- Catchment History -- Hierarchical Patterns of Geomorphic Features in Catchments -- Geomorphic Processes and Process Domains -- Headwater Erosion -- Channel Processes -- Floodplain and Channel Interactions -- Hydrologic Connectivity and Surface Water-Groundwater Exchange -- Surface Connectivity and Flooding -- The Dynamics of the Linked Surface-Subsurface Hydrologic System -- Conclusions -- 3 Riparian Typology -- Overview -- Purpose -- The Historical Context -- Theoretical Basis for Classification -- Application of Ecological Information -- Inventory -- Classification -- Emerging Classification Concepts -- Geomorphic Classification -- Hierarchical Classification -- Rosgen's Classification -- Geomorphic Characterization (Aspect I) -- Morphologic Description (Aspect II) -- The Process Domain Concept -- The Hydrogeomorphic Approach -- Biotic Classification -- Soils -- Plants -- Wildlife -- Treating Complexity and Heterogeneity in Classification Systems -- Attributes of an Enduring Classification System -- Conclusions -- 4 Structural Patterns -- Overview -- Purpose -- Life History Strategies -- Morphological and Physiological Adaptations of Riparian Plants -- Reproductive Strategies -- Distribution, Structure, and Abundance -- Identification of Riparian Zones Based on Soils and Vegetation Type -- Biophysical Characteristics of Riparian Soils -- Organic Matter -- Moisture -- Fauna -- General Distributions of Aboveground and Belowground Communities -- Lateral Zonation. , Longitudinal Zonation -- Successional and Seasonal Community Patterns -- Vegetative Succession -- Faunal Succession -- Density, Basal Area, and Biomass -- Biological Diversity -- Diversity Theory and Measurement -- Vegetative Diversity -- Site and Catchment Patterns -- Refuges -- Factors Controlling Species Richness -- Faunal Diversity -- Diversity of Soil Organisms -- Aboveground Fauna Diversity -- 5 Biotic Functions of Riparia -- Overview -- Purpose -- Water Use and Flux -- Nutrient Fluxes -- Overview of Cycles and Processes -- Production Ecology -- Growth and Metabolism of Riparian Trees -- Timing of Growth and Rates of Net Primary Production -- Litterfall -- Mortality Rates -- Root Production -- Decomposition Dynamics -- Principles of Decomposition Dynamics -- Litter Quality -- Exogenous Nutrient Supply -- Temperature -- Oxygen Tension -- Nutrient Dynamics During Decay -- Factors Controlling Immobilization of Nitrogen -- Initial Litter Quality -- Exogenous Nutrient Supply -- Anaerobic Decay -- Temperature -- Mechanisms of Nitrogen Immobilization -- Nitrogen Accumulation in Microbial Biomass -- Nitrogen Accumulation in By-Products of Microbial Activity -- Decomposition of Riparian Litter -- Information Fluxes -- Microclimate -- Conclusions -- 6 Biophysical Connectivity and Riparian Functions -- Overview -- Purpose -- Patch Dynamics and a Landscape Perspective of Catchments -- Nutrient Flows -- Riparian Zones as Buffers Against Nutrient Pollution from Upland Runoff -- Riparian Zones as Buffers Against High In-Stream Nutrient Levels -- Particle-Nutrient Considerations -- Energy Flows and Food Webs -- Energy Flows Between Riparia and Adjoining Aquatic Systems -- Large Animal Connections -- The Functional Grouping of Large Animal Interactions -- Pacific Salmon Influences on Riparian Ecosystems -- Conclusions -- 7 Disturbance and Agents of Change. , Overview -- Purpose -- Major Categories of Change -- Human Demography -- Resource Use -- Technology Development -- Social Organization -- Riparian Disturbances -- Defining Anthropogenic Disturbance -- Understanding History: Basic Concepts and Approaches -- Legacies and Lag-Times -- Cumulative Effects -- Historical Examples of Riparian Alterations -- Pervasive Human-Mediated Changes -- Disturbance Ecology: Responses to Stress -- Ecological Consequences of Flow Regulation -- Theory -- Extent of Flow Regulation -- Effects on Native Species and Processes -- Alterations to Energy and Nutrient Budgets -- Basic Ecological Principles -- Consequences of Global Climate and Land Use Changes -- Climate Change -- Changes in Temperature Regimes -- Changes in Precipitation and Runoff Regimes -- Early Snowmelt Runoff -- Increased Precipitation Variability -- Reduced Discharge -- Can Riparia Adapt to Climate Change? -- Land Use Change -- Temperature Regimes -- Nutrient Enrichment -- Invasive Species -- Conclusions -- 8 Management -- Overview -- Purpose -- Riparian Management: A Recent and Evolving Concern -- Economic Valuation of Riparia -- Social and Cultural Perspective -- Suitable Management Institutions -- Information Collection and Dissemination -- Riparian Management: A Process Linked to Catchment and to River Management -- Riparian Benefits from Catchment Management -- Riparian Benefits from River Management -- Catchments and Rivers Benefit from Riparian Management -- Riparian Management: A Highly Specific Process -- Adaptiveness -- Sustainability -- Appropriateness -- Timber Harvest Practices -- Revegetation of Riverbanks -- Human Dimension of Riparian Management -- Shared Socioenvironmental Visions -- Social-Ecological Systems -- Communication Needs -- Conclusions -- Riparian Management as an Emerging Issue -- 9 Conservation -- Overview -- Purpose. , Conserving Riparia for Biodiversity -- Conserving Riparia for Ecosystem Services -- Conserving Riparia for their Hydrologic Effects -- Riparian Conservation in a Management Context -- Human Benefits from Riparian Conservation -- Emergence of New Conservation Legislation -- Riparian Conservation for the Long Term -- Approaching Scientific Uncertainty in Ecological Problem Solving -- Integrating Ecological Knowledge with the Social and Ethical Aspects -- Conclusions -- 10 Restoration -- Overview -- Purpose -- General Principles and Definitions -- Returning to More Natural Hydrologic Regimes -- Developing a Restoration Plan -- Getting Organized -- Identifying Problems and Opportunities -- Defining Goals and Objectives -- Implementing, Monitoring, and Evaluating -- Financial Incentives -- Setting Priorities -- Assessing the Ecological Integrity of Riparia -- Specific Enhancements -- Implementing Riparian Silvicultural Practices -- Reintroducing Large Woody Debris -- Designing Riparian Buffer Zones -- Prescribed Grazing -- Optimizing Riparia for Biodiversity -- Conclusions -- 11 Synthesis -- Overview -- Purpose -- Riparia as Keystone Units of Catchment Ecosystems -- Riparia as Nodes of Ecological Organization -- A Unified Perspective of Riparian Ecology -- Developing a Future Vision -- Scenario Development -- Forecasting, Prediction, and Projection -- Emerging Perspectives, Tools, and Approaches -- Emerging Perspectives -- Emerging Tools and Approaches -- Aboveground -- Belowground -- General Techniques -- Principles for the Ecological Management of Riparia -- Global Environmental Change -- Conclusions -- Bibliography -- Index.
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  • 2
    Online Resource
    Online Resource
    Cary : Oxford University Press, Incorporated
    Keywords: Biogeochemistry -- Amazon River Watershed ; Amazon River ; Electronic books ; local ; Amazon River ; Biogeochemistry ; Amazon River Watershed ; Electronic books ; Amazonas ; Einzugsgebiet ; Biogeochemie ; Ökologische Chemie ; Kreislauf ; Stoffhaushalt ; Amazonastiefland ; Biogeochemie
    Description / Table of Contents: With a complex assemblage of largely intact ecosystems that support the earth's greatest diversity of life, the Amazon basin is a focal point of international scientific interest. And, as development and colonization schemes transform the landscape in increasing measure, scientists from around the world are directing attention to questions of regional and global significance. Some of these qustions are: What are the fluxes of greenhouse gases across the atmospheric interface of ecosystems? How mush carbon is stored in the biomass and soils of the basin? How are elements from the land transferred to the basin's surface waters? What is the sum of elements transferred from land to ocean, and what is its marine "fate"? This book of original chapters by experts in chemical and biological oceanography, tropical agronomy and biology, and the atmospheric sciences will address these and other important questions, with the aim of synthesizing the current knowledge of biochemical processes operating within and between the various ecosystems in the Amazon basin.
    Type of Medium: Online Resource
    Pages: 1 online resource (378 pages)
    ISBN: 9780195354232
    DDC: 577.1409811
    RVK:
    RVK:
    RVK:
    Language: English
    Note: Description based on publisher supplied metadata and other sources
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  • 3
    ISSN: 1573-515X
    Keywords: dissolved nitrogen dynamics ; nitrate ; ammonium ; riparian processes ; tropical forests ; Amazônia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract Processes operating at the terrestrial-lotic interface may significantly alter dissolved nitrogen concentrations in groundwater as a result of shifting redox conditions and microbial communities. We monitored concentrations of total dissolved nitrogen, NO 4 − , NH 4 − , O2 and Fe2+ for 10 months along two transects tracing groundwater flow from an upland (terra firme) forest, beneath the riparian forest, and into the stream channel of a small Central Amazonian catchment. Our aim was to examine the role of near-stream processes in regulating groundwater transfers of dissolved nitrogen from terrestrial to lotic ecosystems in the Central Amazon. We found pronounced compositional differences in inorganic nitrogen chemistry between upland, riparian, and stream hydrologic compartments. Nitrate dominated (average 89% of total inorganic nitrogen; TIN) the inorganic nitrogen chemistry of oxygenated upland groundwater but decreased markedly upon crossing the upland-riparian margin. Conversely, NH 4 − dominated (average 93% of TIN) the inorganic chemistry of apparently anoxic riparian groundwater; NH 4 − and TIN concentrations decreased markedly across the riparian-stream channel margin. In the oxygenated streamwater, NO 3 − again dominated (average 82% of TIN) inorganic nitrogen chemistry. Denitrification followed by continued ammonification is hypothesized to effect the shift in speciation observed at the upland-riparian margin, while a combination of several processes may control the shift in speciation and loss of TIN observed at the riparian-stream margin. Dissolved organic nitrogen concentrations did not vary significantly between upland and riparian groundwater, but decreased across the riparian-stream margin. Our data suggest that extensive transformation reactions focused at the upland and stream margins of the riparian zone strongly regulate and diminish transfers of inorganic nitrogen from groundwater to streamwater in the catchment. This suggestion questions the veracity of attempts in the literature to link stream nitrogen chemistry with nutrient status in adjacent forests of similar catchments in the Central Amazon. It also complicates efforts to model nitrogen transfers across terrestrial-lotic interfaces in response to deforestation and changing climate.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1573-515X
    Keywords: Amazônia ; dissolved nitrogen dynamics ; groundwater ; nitrogen isotopes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract The δ15N composition of the dominant form of dissolved inorganic nitrogen (DIN) was determined in upland groundwater, riparian groundwater, and stream water of the Barro Branco catchment, Amazônas, Brazil. The δ15N composition of organic nitrogen in riparian and upland leaf litter was also determined. The data for these waters could be divided into three groups: upland groundwater DIN predominately composed of NO3 − with δ15N values averaging 6.25 ± 0.9 riparian groundwater DIN primarily composed of NH4 + with δ15N values averaging 9.17 ± 1.0 and stream water DIN predominately composed of NO3 − with δ15N values averaging 4.52 ± 0.8‰ Nitrate samples taken from the stream source and from the stream adjacent to the groundwater transects showed a downstream increase in δ15N from 1.0to 4.5‰ Leaf litter samples averaged 3.5 ± 1.2‰ The observed patterns in isotopic composition, together with previously observed inorganic nitrogen species and concentration shifts between upland, riparian and stream waters, suggest that groundwater DIN is not the primary source of DIN to the stream. Instead, the isotopic data suggest that remineralization of organic nitrogen within the stream itself may be a major source of stream DIN, and that the majority of DIN entering the stream via groundwater flowpaths is removed at the riparian-stream interface.
    Type of Medium: Electronic Resource
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