3rd ed. 2013, XXI, 208 p. 73 illus., 18 illus. in color.
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Describes the integration of several different approaches to ask and then answer questions regarding the function of interesting plant metabolites
An authoritative, up-to-date resource that sets the gold standard for thought and research plant biochemistry
Gives a clear picture of the breadth of plant (bio)chemistry research in North America, which is indicative of the state of the field worldwide
The pioneering watershed-ecosystem studies initiated at the Hubbard Brook Experimental Forest in 1963 underpin this thoroughly updated and in-depth analysis of the biogeochemistry of a forested ecosystem in the White Mountains of New Hampshire. In a novel synthesis of almost 50 years, this third Edition summarizes and interprets these unique data on precipitation and streamwater chemistry, hydrology, and weathering and also considers the role of atmospheric gases and particles as they flow into and out of the ecosystem. Long-term, complete annual budgets are presented for many critical elements in the ecosystem, providing for the first time a comparative view of biogeochemical dynamics in the Hubbard Brook watershed-ecosystems. These results show how an ecosystem is connected to global biogeochemical cycles by its inputs and outputs of water and nutrients.
About the Author:
Gene E. Likens is a co-founder of the Hubbard Brook Ecosystem Study and Founder and President Emeritus of the Cary Institute of Ecosystem Studies in Millbrook, New York. Likens was awarded the National Medal of Science in 2001, largely for his work at Hubbard Brook.
1 Ecosystem Analysis Small Watershed Approach The Hubbard Brook Ecosystem Location Climate Area, Topography, and Aspect Geology Soils Vegetation and Fauna Drainage Streams Concluding Thoughts 2 Hydrology The Water-Year Precipitation Streamflow and Evapotranspiration Deep Seepage Representativeness of the Hydrology of the Hubbard Brook Experimental Forest for Northern New England 3 Chemistry Precipitation Chemistry Annual Volume-Weighted Concentrations Origin of Ions in Bulk Precipitation Dry Deposition Elevational Effects Acid Precipitation Acid rain and base cation depletion Some charge equivalence changes and biotic responses: Headwater results scaled to Hubbard Brook and Beyond: Snow and Snowpack Chemistry Dilution and Effect of Acid Rain on Baselines Impact of acid rain on accumulation of forest biomass How has the forest ecosystem in W6, the reference watershed, responded to acid rain? Trace Metals Throughfall and Stemflow Streamwater Chemistry Concentrations of Dissolved Substances Valleywide Streamwater Chemistry – A Synoptic View Seasonal Variations in Bulk Precipitation and Streamwater Concentrations Long-Term Trends in Bulk Precipitation and Streamwater Chemistry 4 Input-Output Budgets Mass Meteorologic Input of Dissolved Substances Annual Variation in Net Hydrological Budgets Some Examples of Important Components of Input-Output Budgets Nitrogen Chlorine Sulfur Dissolved Silica Input-Output Budgets: Summary Monthly Variations Output Consistently Greater Than Input Input Consistently Greater Than Output Crossover Patterns Relationship of Annual Mass Output of Dissolved Substances to Annual Streamflow Annual Variation in Mass Output of Dissolved Substances Particulate Matter Measurement of mass output Annual loss Seasonal variation in erodibility Particulate Matter Versus Dissolved Substance Export The Role of Debris Avalanches in Landscape Denudation Long-Term Changes in Input/Output Budgets 5 Weathering Source of Hydrogen Ion in the Weathering Reaction Carbon Nitrogen Sulfur Estimates of Ecosystem Weathering Flux Net Soil Release 6 Nutrient Cycles and Mass Balances The Calcium Cycle The Potassium Cycle The Sulfur Cycle Nutrient Cycle Relationships at the HBEF Annual Watershed-Ecosystem Mass Balances (“Budgets”) Calcium Sodium Potassium Sulfur Nitrogen Nitrogen retention in forested watershed-ecosystems Chlorine 7 The Northern Hardwood Ecosystem in the Hubbard Brook Valley in Relation to Other Forest Ecosystems 8 Summary Discussion and Conclusions Epilog Odyssey
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