The effect of particle shape on the strength, dilatancy, and stress-dilatancy relationship was systematically investigated through a series of drained triaxial compression tests on sands mixed with angular and rounded glass beads of different proportions (0%, 25%, 50%, 75%, and 100%). A distinct overall regularity parameter was used to define...
The use of timber harvest residue as an energy source is thought to have environmental benefits relative to food-based crops, yet the ecological impact of this practice remains largely unknown. We assessed whether the abundance and diversity of wild bees (Apoidea) were influenced by the removal of harvest residue and...
The juvenile demersal fish assemblage along the Pacific Northwest coast has received little attention relative to adult life history stages since pioneering work in the 1970s. Increasing severity of hypoxia along the Oregon coast in recent years has prompted investigations into the response of biota in this region. We used...
Sustained time series have provided compelling evidence for progressive acidification of the
surface oceans through exchange with the growing atmospheric reservoir of carbon dioxide. However,
few long-term programs exist, and extrapolation of results from one site to larger oceanic expanses is
hampered by the lack of spatial coverage inherent to...
Sustained time series have provided compelling evidence for progressive acidification of the
surface oceans through exchange with the growing atmospheric reservoir of carbon dioxide. However,
few long-term programs exist, and extrapolation of results from one site to larger oceanic expanses is
hampered by the lack of spatial coverage inherent to...
Full Text:
John E. Dore1, Matthew J. Church2, David M. Karl2, Daniel W. Sadler2, and Ricardo M. Letelier3
Translocation experiments, in which researchers displace animals and then
monitor their movements to return home, are commonly used as tools to assess functional
connectivity of fragmented landscapes. Such experiments are purported to have important
advantages of being time efficient and of standardizing ‘‘motivation’’ to move across
individuals. Yet, we lack...
Translocation experiments, in which researchers displace animals and then
monitor their movements to return home, are commonly used as tools to assess functional
connectivity of fragmented landscapes. Such experiments are purported to have important
advantages of being time efficient and of standardizing ‘‘motivation’’ to move across
individuals. Yet, we lack...
Full Text:
species
NOELIA L. VOLPE,1 ADAM S. HADLEY,2 W. DOUGLAS ROBINSON,1 AND MATTHEW G. BETTS2,3
1Department of
We present 36 new ⁴⁰Ar-³⁹Ar incremental heating age determinations from the Caribbean Large
Igneous Province (CLIP) providing evidence for extended periods of volcanic activity and suggest a new
tectonomagmatic model for the province’s timing and construction. These new ⁴⁰Ar-³⁹Ar ages for the
Curaçao Lava Formation (CLF) and Haiti’s Dumisseau Formation...
Full Text:
insights from
Curaçao and Haiti
MatthewW. Loewen, Robert A. Duncan, Adam J. R. Kent, and Kyle Krawl
We present 36 new ⁴⁰Ar-³⁹Ar incremental heating age determinations from the Caribbean Large
Igneous Province (CLIP) providing evidence for extended periods of volcanic activity and suggest a new
tectonomagmatic model for the province’s timing and construction. These new ⁴⁰Ar-³⁹Ar ages for the
Curaçao Lava Formation (CLF) and Haiti’s Dumisseau Formation...
Context:
Functional connectivity—the facilitation of individual movements among habitat patches—is essential for species’ persistence in fragmented landscapes. Evaluating functional connectivity is critical for predicting range shifts, developing conservation plans, and anticipating effects of disturbance, especially for species affected by climate change.
Objectives:
We examined whether simplifying forest structure influenced animal...
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