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Article
Nitrogen-bedrock interactions regulate multi-element nutrient limitation and sustainability in forests
Nutrient limitation of tree growth can intensify when nutrients are lost to forest harvest, creating challenges for forest growth and sustainability. Forest harvest accelerates nutrient loss by removing nutrie...
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Article
Symbiotic nitrogen fixation does not stimulate soil phosphatase activity under temperate and tropical trees
Symbiotic nitrogen (N)-fixing plants can enrich ecosystems with N, which can alter the cycling and demand for other nutrients. Researchers have hypothesized that fixed N could be used by plants and soil microb...
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Article
Exploring the Role of Cryptic Nitrogen Fixers in Terrestrial Ecosystems: A Frontier in Nitrogen Cycling Research
Biological nitrogen fixation represents the largest natural flux of new nitrogen (N) into terrestrial ecosystems, providing a critical N source to support net primary productivity of both natural and agricultu...
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Article
Early growth and ecophysiological responses of Koa (Acacia koa A. Gray) seedlings to reduced water and phosphorus
Sites in need of restoration typically have one or more environmental factors that limit seedling establishment. Identifying ecophysiological responses to environmental stressors can provide important insights...
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Article
Decadal-scale decoupling of soil phosphorus and molybdenum cycles by temperate nitrogen-fixing trees
Symbiotic nitrogen- (N) fixing trees can influence multiple biogeochemical cycles by fixing atmospheric N, which drives net primary productivity and soil carbon (C) and N accumulation, as well as by mobilizing...
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Article
Nutrient feedbacks to soil heterotrophic nitrogen fixation in forests
Multiple nutrient cycles regulate biological nitrogen (N) fixation in forests, yet long-term feedbacks between N-fixation and coupled element cycles remain largely unexplored. We examined soil nutrients and he...
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Chapter
Long-Term Forest Productivity
Planning for forest sustainability has been a hallmark of US national resource management, beginning with the work of several visionaries of the previous century, including Gifford Pinchot and US presidents Gr...
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Article
Riparian Soil Development Linked to Forest Succession Above and Below Dams Along the Elwha River, Washington, USA
Riparian forest soils can be highly dynamic, due to frequent fluvial disturbance, erosion, and sediment deposition, but effects of dams on riparian soils are poorly understood. We examined soils along toposequ...
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Chapter
Enhancing Public Trust in Federal Forest Management
The connections between social and biophysical sciences are being forged in new ways as researchers and practitioners of natural resources seek to understand how lands can be managed for the benefit of human s...
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Article
Decomposition drives convergence of forest litter nutrient stoichiometry following phosphorus addition
Nutrient levels in decomposing detritus and soil can influence decomposition rates and detrital nutrient dynamics in differing ways among various detrital components of forests. We assessed whether increased p...
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Article
Soil organic matter regulates molybdenum storage and mobility in forests
The trace element molybdenum (Mo) is essential to a suite of nitrogen (N) cycling processes in ecosystems, but there is limited information on its distribution within soils and relationship to plant and bedroc...
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Article
Disturbance and Topography Shape Nitrogen Availability and δ15N over Long-Term Forest Succession
Forest disturbance and long-term succession towards old-growth are thought to increase nitrogen (N) availability and N loss, which should increase soil δ15N values. We examined soil and foliar patterns in N and δ
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Article
Open AccessConvergence of soil nitrogen isotopes across global climate gradients
Quantifying global patterns of terrestrial nitrogen (N) cycling is central to predicting future patterns of primary productivity, carbon sequestration, nutrient fluxes to aquatic systems and climate forcing. W...
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Article
Erratum to: N2-Fixing Red Alder Indirectly Accelerates Ecosystem Nitrogen Cycling
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Article
Decomposition and nitrogen dynamics of 15N-labeled leaf, root, and twig litter in temperate coniferous forests
Litter nutrient dynamics contribute significantly to biogeochemical cycling in forest ecosystems. We examined how site environment and initial substrate quality influence decomposition and nitrogen (N) dynamic...
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Article
Nitrogen limitation, 15N tracer retention, and growth response in intact and Bromus tectorum-invaded Artemisia tridentata ssp. wyomingensis communities
Annual grass invasion into shrub-dominated ecosystems is associated with changes in nutrient cycling that may alter nitrogen (N) limitation and retention. Carbon (C) applications that reduce plant-available N ...
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Article
N2-Fixing Red Alder Indirectly Accelerates Ecosystem Nitrogen Cycling
Symbiotic N2-fixing tree species can accelerate ecosystem N dynamics through decomposition feedbacks via both direct and indirect pathways. Direct pathways include the production of readily decomposed leaf litter...
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Article
δ15N constraints on long-term nitrogen balances in temperate forests
Biogeochemical theory emphasizes nitrogen (N) limitation and the many factors that can restrict N accumulation in temperate forests, yet lacks a working model of conditions that can promote naturally high N ac...
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Article
Complementary Models of Tree Species–Soil Relationships in Old-Growth Temperate Forests
Ecosystem-level studies identify plant–soil feedbacks as important controls on soil nutrient availability, particularly for nitrogen and phosphorus. Although site- and species-specific studies of tree species–...
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Article
Ecosystem N Distribution and δ15N during a Century of Forest Regrowth after Agricultural Abandonment
Stable isotope ratios of terrestrial ecosystem nitrogen (N) pools reflect internal processes and input–output balances. Disturbance generally increases N cycling and loss, yet few studies have examined ecosyst...
