Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Hubbard Brook Experimental Forest"”.
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Digital terrain analysis to predict soil spatial patterns at the Hubbard Brook Experimental Forest
Topographic analysis using digital elevation models (DEMs) has become commonplace in soil and hydrologic modeling and analysis and there has been considerable assessment of the effects of grid resolution on topographic metrics using DEMs of 10 m resolution or coarser. However, examining fine-scale …
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Quantifying Solute and Water Fluxes in Headwater Streams Using Passive Flux Meters
… calcium, aluminum, and sulfur in streams of the Hubbard Brook Experimental Forest in New Hampshire, USA. In general, the PFM estimates of surface and subsurface stream chemistry were more accurate when flow rates were higher and more water passed through the PFM. During the lowest flows, PFMs …
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Natural abundance of ¹⁵N as a tool for assessing patterns of nitrogen loss from forest ecosystems
… for the reference watershed (W6) at the Hubbard Brook Experimental Forest (HBEF); when nitrate losses were high, [delta]15 N increased. I measured the [delta]15N of soils from 28 soil pits at Watershed 5 at the HBEF before and after clear-cutting in order t[delta]test the hypothesis that …
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Temporal Dynamics of Groundwater Flow Direction in a Glaciated, Headwater Catchment
… critical zone of a headwater catchment at the Hubbard Brook Experimental Forest in North Woodstock, NH. Groundwater levels were continuously monitored throughout several seasons (March 2019 to Jan 2020) in a network of wells comprising three hillslope transects within the upper hillslopes of …
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Hydrochemical Dynamics Under Differing Winter Climate Regimes at the Hubbard Brook Experiment Forest
… hydrochemical dynamics of drainage waters at the Hubbard Brook Experimental Forest (HBEF) in New Hampshire, USA, that aims to improve understanding of changes in water quality associated with winter climate variation. The first phase was an analysis of the long-term stream and soil water chemistry …
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Seasons in the Stream: River Ecosystem Phenology in a Changing Climate
… and careful monitoring of algae in a small forested river (Chapter 3), and in evaluating whether ice cover determines patterns of primary productivity along a river continuum (Chapter 4). Finally, I provide a framework for evaluating how climate change may be impacting the patterns of …
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Modeling the Effects of Acid Deposition and Natural Organic Acids on Surface Waters
… the northeastern U.S.: the Adirondacks and the Hubbard Brook Experimental Forest in New Hampshire. Combining a chemical equilibrium model and an optimization algorithm, I generated a modeling framework to parameterize organic acids in order to provide the best predictions for pH, ANC and …
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Biogeochemical Modeling of the Response of Forest Watersheds in the Northeastern U.S. to Future Climate Change
… responses of future climate change conditions on forested watersheds in the northeastern U.S. using climate projections from several atmosphere ocean general circulation models (AOGCMs) under different carbon dioxide (CO2) emissions scenarios. The impacts of changing climate on terrestrial …
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Modeling the interactions of forest cutting and climate change on the hydrology, biomass and biogeochemistry of a northeastern forest
… lead to integrated and interactive effects on forest ecosystems, altering their structure and function, and therefore long-term sustainability. Understanding both short- and long-term impacts of harvesting practices (e.g., cutting rotation length, intensity) on forest dynamics is a key factor …
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Dynamics of water, carbon, and nitrogen in forest and alpine tundra ecosystems in the Pacific Northwest and the Rocky Mountains of the U.S. under future climate change
… which has been extensively applied to the forest ecosystems in the northeastern United States, the interactive effects of multiple environmental factors on ecosystem function and element dynamics can be investigated. </p> <p>In this dissertation, I applied PnET-BGC to three ecosystems, …