1.Dams disrupt the river continuum, altering hydrology, biodiversity and energy flow. Although research indicates that tributary inputs have the potential to dilute these effects, knowledge at the food‐web level is still scarce. 2.Here, we examined the riverine food‐web structure of the Colorado River below Glen Canyon Dam, focusing on organic […]
The Carbon Copy is the Ecoss bi-monthly newsletter featuring news, publications, and comment from around the research center. Read past issues: February 2023 November 2022
Phosphorus (P) limitation of aboveground plant production is usually assumed to occur in tropical regions but rarely elsewhere. Here we report that such P limitation is more widespread and much stronger than previously estimated. In our global meta-analysis, almost half (46.2%) of 652 P-addition field experiments reveal a significant P […]
Ecoss member, Karen Haubensak together with the main Principal Investigator Kevin Grady from Forestry and Clare Aslan from Earth Sciences and Environmental Sustainability, launched an ambitious project, which is designed to identify the foundation species best suited for seed production for crisis events as well as for large-scale restoration. The […]
The concentration detection threshold (CDT) is the concentration of particles in solution beyond which a (serial dilution) assay detects particle presence. By our account, CDTs typically are not estimated but are fixed at some value. Setting a CDT to zero (d=0d=0) implies perfect detection, a common assumption, and setting d>0d>0 […]
The amount of carbon plants allocate to mycorrhizal symbionts exceeds that emitted by human activity annually. Senescent ectomycorrhizal roots represent a large input of carbon into soils, but their fate remains unknown. Here, we present the surprising result that, despite much higher nitrogen concentrations, roots colonized by ectomycorrhizal (EM) fungi […]
Many thermophiles catalyse free energy-yielding redox reactions involving nitrogenous compounds; however, little is known about these processes in natural thermal environments. Rates of ammonia oxidation, denitrification and dissimilatory nitrate reduction to ammonium (DNRA) were measured in source water and sediments of two ∼80°C springs in the US Great Basin. Ammonia […]
Rising temperatures are expected to reduce global soil carbon (C) stocks, driving a positive feedback to climate change1, 2, 3. However, the mechanisms underlying this prediction are not well understood, including how temperature affects microbial enzyme kinetics, growth efficiency (MGE), and turnover4, 5. Here, in a laboratory study, we show […]
In forests around the world, drought leaves a legacy that endures even after the rains return. Three Northern Arizona University researchers contributed to a study published this week in Science that showed surviving trees took an average of two to four years to recover and resume normal growth rates after […]
ESSTE es una experiencia de tres semestres con oportunidades como pasantías y mentorías para estudiantes de cualquier licenciatura. El programa busca preparar a las próximas generaciones para enfrentarse a desafíos como sequías, incendios e inundaciones. El programa ESSTE fue creado en respuesta a la falta de oportunidades de entrenamiento y […]