A5039399457- Soil Carbon and Nitrogen Dynamics
- Ecology and Vegetation Dynamics Studies
- Plant Water Relations and Carbon Dynamics
- Peatlands and Wetlands Ecology
- Atmospheric chemistry and aerosols
- Soil and Water Nutrient Dynamics
- Forest Ecology and Biodiversity Studies
- Atmospheric and Environmental Gas Dynamics
- Plant responses to elevated CO2
- Plant and animal studies
- Species Distribution and Climate Change
- Atmospheric Ozone and Climate
- Geology and Paleoclimatology Research
- Mycorrhizal Fungi and Plant Interactions
- Microbial Community Ecology and Physiology
- Plant Parasitism and Resistance
- Isotope Analysis in Ecology
- Insect-Plant Interactions and Control
- Rangeland and Wildlife Management
- Agroforestry and silvopastoral systems
- Diverse Educational Innovations Studies
- Bamboo properties and applications
- Insect and Arachnid Ecology and Behavior
- Crop Yield and Soil Fertility
- Groundwater and Isotope Geochemistry
Agricultural Plant Physiology and Ecology Research Institute
2015-2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2015-2024
University of Buenos Aires
2015-2024
National University of General San Martín
2014-2018
Instituto Tecnológico de Chascomús
2014
Stanford University
1998-2012
Utrecht University
2012
New Phytologist Foundation
2011
Centro Científico Tecnológico - San Juan
2011
University of Alberta
2007
We compiled new and published data on the natural abundance N isotope composition (δ 15 values) of soil plant organic matter from around world. Across a broad range climate ecosystem types, we found that δ values systematically decreased with increasing mean annual precipitation (MAP) decreasing temperature (MAT). Because most undisturbed soils are near steady state, observations suggest an fraction losses N‐depleted forms (NO 3 , 2 O, etc.) MAP MAT. Wetter colder ecosystems appear to be...
Abstract Increased atmospheric nitrogen (N) deposition is known to reduce plant diversity in natural and semi‐natural ecosystems, yet our understanding of these impacts comes almost entirely from studies northern Europe North America. Currently, we lack an the threat N biodiversity at global scale. In particular, rates within newly defined 34 world hotspots, which 50% world's floristic restricted, has not been quantified previously. Using output chemistry transport models, here provide first...
We assembled a globally-derived data set for site-averaged foliar δ15N, the δ15N of whole surface mineral soil and corresponding site factors (mean annual rainfall temperature, latitude, altitude pH). The was related to all variables (including δ15 N) except and, when regressed on latitude rainfall, provided best model these data, accounting 49% variation in δ15N. As single linear regressions, more strongly than A smaller showed similar, negative correlations between moisture variations...
Plant litter decomposition is a critical step in the formation of soil organic matter, mineralization nutrients, and carbon balance terrestrial ecosystems. Biotic mesic ecosystems generally negatively correlated with concentration lignin, group complex aromatic polymers present plant cell walls that recalcitrant to enzymatic degradation serves as structural barrier impeding microbial access labile compounds. Although photochemical has recently been shown be important semiarid ecosystems,...
Summary A major challenge in predicting biodiversity effects on ecosystem functioning is to understand the linkages between above‐ground and below‐ground components natural communities. However, incongruities spatial temporal scale plant soil processes, confounding ecological factors, have impeded our understanding of particularly ecosystems with long‐lived species such as forests. We designed an approach isolate composition from other order evaluate individual tree mixtures litter...
Summary Litter decomposition in terrestrial ecosystems is an important first step for carbon and nutrient cycling, as senescent plant material degraded consequently incorporated, along with microbial products, into soil organic matter. The identification of litter affinity effects, whereby accelerated its home environment (home‐field advantage, HFA ), highlights the importance plant–soil interactions that have consequences biogeochemical cycling. While not universal, these effects been...
Significance Understanding controls on carbon storage in terrestrial ecosystems is essential to predict and mitigate human impacts the global cycle. This study identifies a general unifying mechanism explain how photochemical mineralization of plant litter, photodegradation, affects subsequent biotic decomposition. Previous work has shown that photodegradation can be major direct control loss arid lands. We now demonstrate that, across wide range species, exposure sunlight large...
Abstract Nitrogen is a critical component of the economy, food security, and planetary health. Many world's sustainability targets hinge on global nitrogen solutions, which, in turn, contribute lasting benefits for (i) world hunger; (ii) soil, air, water quality; (iii) climate change mitigation; (iv) biodiversity conservation. Balancing projected rise agricultural demands while achieving these 21st century ideals will require policies to coordinate solutions among technologies, consumer...
Deadwood is a large global carbon store with its size partially determined by biotic decay. Microbial wood decay rates are known to respond changing temperature and precipitation. Termites also important decomposers in the tropics but less well studied. An understanding of their climate sensitivities needed estimate change effects on pools. Using data from 133 sites spanning six continents, we found that termite discovery consumption were highly sensitive (with increasing >6.8 times per 10°C...
During the course of this century, increasing human population and economic development will continue to put pressure on agricultural systems for increased crop yields ([Rosegrant Cline, 2003][1]; [Foley et al., 2005][2]). Grains produced livestock feed biofuels are now competing
Summary 1 The effects of precipitation on litter quality and surface decomposition were evaluated across a natural rainfall gradient, ranging from 500 to 5500 mm mean annual precipitation, the island Hawai’i. 2 Litter Metrosideros polymorpha driest (500 mm) wettest (5500 extremes gradient was decomposed at five sites along . collected all also single common site (2500 mm), M. each collection ( in situ ). 3 Initial varied significantly with site. Leaf mass per area (LMA) phosphorus content...