Skip to main content

16 Result(s)

within Steven S. Perakis Remove this filter Life Sciences Remove this filter

and

  1. No Access

    Article

    Sediment-to-water blue-green algal recruitment in response to alum and environmental factors

    The sediment-to-water recruitment of blue-green algae was investigated in a shallow lake following treatment with aluminum sulfate and sodium aluminate to control sediment phosphorus (P) release. A comparison ...

    Steven S. Perakis, Eugene B. Welch, Jean M. Jacoby in Hydrobiologia (1996)

  2. No Access

    Article

    Coupled Nitrogen and Calcium Cycles in Forests of the Oregon Coast Range

    Nitrogen (N) is a critical limiting nutrient that regulates plant productivity and the cycling of other essential elements in forests. We measured foliar and soil nutrients in 22 young Douglas-fir stands in th...

    Steven S. Perakis, Douglas A. Maguire, Thomas D. Bullen, Kermit Cromack… in Ecosystems (2006)

  3. No Access

    Article

    Imprint of oaks on nitrogen availability and δ15N in California grassland-savanna: a case of enhanced N inputs?

    Woody vegetation is distributed patchily in many arid and semi-arid ecosystems, where it is often associated with elevated nitrogen (N) pools and availability in islands of fertility. We measured N availabilit...

    Steven S. Perakis, Chev H. Kellogg in Plant Ecology (2007)

  4. No Access

    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...

    Jana E. Compton, Toby D. Hooker, Steven S. Perakis in Ecosystems (2007)

  5. No Access

    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–...

    Alison Cross, Steven S. Perakis in Ecosystems (2011)

  6. No Access

    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...

    Steven S. Perakis, Emily R. Sinkhorn, Jana E. Compton in Oecologia (2011)

  7. No Access

    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...

    Steven S. Perakis, Joselin J. Matkins, David E. Hibbs in Ecosystems (2012)

  8. No Access

    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 ...

    Dana L. Witwicki, Paul S. Doescher, David A. Pyke, Nicole M. DeCrappeo… in Oecologia (2013)

  9. No Access

    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...

    Tiff L. van Huysen, Mark E. Harmon, Steven S. Perakis, Hua Chen in Oecologia (2013)

  10. Article

    Erratum to: N2-Fixing Red Alder Indirectly Accelerates Ecosystem Nitrogen Cycling

    Steven S. Perakis, Joselin J. Matkins, David E. Hibbs, Manuela Huso in Ecosystems (2014)

    Download PDF (113 KB) View Article

  11. No Access

    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

    Steven S. Perakis, Alan J. Tepley, Jana E. Compton in Ecosystems (2015)

  12. No Access

    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...

    Tiff L. van Huysen, Steven S. Perakis, Mark E. Harmon in Plant and Soil (2016)

  13. No Access

    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...

    Laura G. Perry, Patrick B. Shafroth, Steven S. Perakis in Ecosystems (2017)

  14. No Access

    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...

    Kaitlin Gerber, Amy Ross-Davis, Steven S. Perakis, Anthony S. Davis in New Forests (2022)

  15. No Access

    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...

    Cory C. Cleveland, Carla R. G. Reis, Steven S. Perakis, Katherine A. Dynarski… in Ecosystems (2022)

  16. No Access

    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...

    Emily A. Jager, Andrew W. Quebbeman, Amelia A. Wolf, Steven S. Perakis… in Oecologia (2023)