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Articles 1 - 3 of 3
Full-Text Articles in Life Sciences
Assessing Nutrient Limitation In Complex Forested Ecosystems : Alternatives To Large-Scale Fertilization Experiments, Benjamin W. Sullivan, Silvia Alvarez-Clare, Sarah C. Castle, Stephen Porder, Sasha C. Reed, Laura Schreeg, Cory C. Cleveland, Alan R. Townsend
Assessing Nutrient Limitation In Complex Forested Ecosystems : Alternatives To Large-Scale Fertilization Experiments, Benjamin W. Sullivan, Silvia Alvarez-Clare, Sarah C. Castle, Stephen Porder, Sasha C. Reed, Laura Schreeg, Cory C. Cleveland, Alan R. Townsend
Ecosystem and Conservation Sciences Faculty Publications
Quantifying nutrient limitation of primary productivity is a fundamental task of terrestrial ecosystem ecology, but in a high carbon dioxide environment it is even more critical that we understand potential nutrient constraints on plant growth. Ecologists often manipulate nutrients with fertilizer to assess nutrient limitation, yet for a variety of reasons, nutrient fertilization experiments are either impractical or incapable of resolving ecosystem responses to some global changes. The challenges of conducting large, in situ fertilization experiments are magnified in forests, especially the high-diversity forests common throughout the lowland tropics. A number of methods, including fertilization experiments, could be seen as …
Agricultural Conversion Without External Water And Nutrient Inputs Reduces Terrestrial Vegetation Productivity, William Kolby Smith, Cory C. Cleveland, Sasha C. Reed, Steven W. Running
Agricultural Conversion Without External Water And Nutrient Inputs Reduces Terrestrial Vegetation Productivity, William Kolby Smith, Cory C. Cleveland, Sasha C. Reed, Steven W. Running
Ecosystem and Conservation Sciences Faculty Publications
Driven by global population and standard of living increases, humanity co-opts a growing share of the planet's natural resources resulting in many well-known environmental trade-offs. In this study, we explored the impact of agriculture on a resource fundamental to life on Earth: terrestrial vegetation growth (net primary production; NPP). We demonstrate that agricultural conversion has reduced terrestrial NPP by ~7.0%. Increases in NPP due to agricultural conversion were observed only in areas receiving external inputs (i.e., irrigation and/or fertilization). NPP reductions were found for ~88% of agricultural lands, with the largest reductions observed in areas formerly occupied by tropical forests …
Management For Mountain Pine Beetle Outbreak Suppression: Does Relevant Science Support Current Policy?, Diana Six, Eric Biber, Elisabeth Long
Management For Mountain Pine Beetle Outbreak Suppression: Does Relevant Science Support Current Policy?, Diana Six, Eric Biber, Elisabeth Long
Ecosystem and Conservation Sciences Faculty Publications
While the use of timber harvests is generally accepted as an effective approach to controlling bark beetles during outbreaks, in reality there has been a dearth of monitoring to assess outcomes, and failures are often not reported. Additionally, few studies have focused on how these treatments affect forest structure and function over the long term, or our forests’ ability to adapt to climate change. Despite this, there is a widespread belief in the policy arena that timber harvesting is an effective and necessary tool to address beetle infestations. That belief has led to numerous proposals for, and enactment of, significant …