A5002917810- Soil Carbon and Nitrogen Dynamics
- Plant Water Relations and Carbon Dynamics
- Forest ecology and management
- Soil erosion and sediment transport
- Ecology and Vegetation Dynamics Studies
- Hydrology and Watershed Management Studies
- Peatlands and Wetlands Ecology
- Soil and Water Nutrient Dynamics
- Forest Management and Policy
- Forest Biomass Utilization and Management
- Fire effects on ecosystems
- Conservation, Biodiversity, and Resource Management
- Remote Sensing and LiDAR Applications
- Climate change and permafrost
- Soil and Unsaturated Flow
- Agroforestry and silvopastoral systems
- African Botany and Ecology Studies
- Agriculture and Rural Development Research
- Soil Geostatistics and Mapping
- Rangeland Management and Livestock Ecology
- Soil Management and Crop Yield
- Tree-ring climate responses
- Rangeland and Wildlife Management
- Mycorrhizal Fungi and Plant Interactions
- Oil Palm Production and Sustainability
Swedish University of Agricultural Sciences
2015-2025
Aristotle University of Thessaloniki
2017
Umeå University
2012
US Forest Service
2011
Center for International Forestry Research
2004-2009
Forest-driven water and energy cycles are poorly integrated into regional, national, continental global decision-making on climate change adaptation, mitigation, land use management. This constrains humanity’s ability to protect our planet’s life-sustaining functions. The substantial body of research we review reveals that forest, interactions provide the foundations for carbon storage, cooling terrestrial surfaces distributing resources. Forests trees must be recognized as prime regulators...
Abstract. Soil moisture is of primary importance for predicting the evolution soil carbon stocks and fluxes, both because it strongly controls organic matter decomposition predicted to change at global scales in following decades. However, functions used model heterotrophic respiration response have limited empirical support introduce an uncertainty least 4% stock predictions by 2100. The necessity improving representation this relationship models has been highlighted recent studies. Here we...
Abstract Water scarcity contributes to the poverty of around one-third world’s people. Despite many benefits, tree planting in dry regions is often discouraged by concerns that trees reduce water availability. Yet relevant studies from tropics are scarce and impacts intermediate cover remain unexplored. We developed tested an optimum theory which groundwater recharge maximized at density. Below this optimal density benefits any additional on percolation exceed their extra use, leading...
Abstract Water scarcity constrains the livelihoods of millions people in tropical drylands. Tree planting these environments is generally discouraged due to large water consumption by trees, but this view may neglect their potential positive impacts on availability. The effect trees soil hydraulic properties linked groundwater recharge poorly understood. In study, we performed 18 rainfall simulations and tracer experiments an agroforestry parkland Burkina Faso investigate associated termite...
This study uses a 12-year time series (2001–2012) of eddy covariance measurements to investigate the long-term net ecosystem exchange (NEE) carbon dioxide (CO2) and inter-annual variations in relation abiotic drivers boreal fen northern Sweden. The peatland was sink for atmospheric CO2 each twelve years with average (± standard deviation) NEE −58 ± 21 g C m−2 yr−1. For ten out years, cumulative annual within range −42 −79 yr−1 suggesting general state resilience moderate climate variations....
Current policy is driving renewed impetus to restore forests return ecological function, protect species, sequester carbon and secure livelihoods. Here we assess the contribution of tree planting ecosystem restoration in tropical sub-tropical Asia; synthesize evidence on mortality growth planted trees at 176 sites structural biodiversity recovery co-located actively restored naturally regenerating forest plots. Mean was 18% 1 year after planting, increasing 44% 5 years. Mortality varied...
Abstract Tree planting in the tropics is conducted for a number of reasons including carbon sequestration, but often competes with increasingly scarce water resources. The basics forest and relations are frequently said to be well understood there pressing need better understand predict hydrological effects land‐use climate change complex dynamic landscapes tropics. This will remain elusive without empirical data required feed process models. It argued that current state knowledge confused...
Organic phosphorus (P) compounds represent a major component of soil P in many soils and are key sources for microbes plants. Solution NMR (nuclear magnetic resonance spectroscopy) is powerful technique characterizing organic species. However, (31)P spectra often complicated by overlapping peaks, which hampers identification quantification the numerous species present soils. Overlap exacerbated presence paramagnetic metal ions, even if they complexes with EDTA following NaOH/EDTA extraction....
Forest biomass is an essential indicator for monitoring the Earth's ecosystems and climate. It a critical input to greenhouse gas accounting, estimation of carbon losses forest degradation, assessment renewable energy potential, developing climate change mitigation policies such as REDD+, among others. Wall-to-wall mapping aboveground (AGB) now possible with satellite remote sensing (RS). However, RS methods require extant, up-to-date, reliable, representative comparable in situ data...
Mineralization of soil organic matter (SOM) constitutes a major carbon flux to the atmosphere. The use efficiency (CUE) saprotrophic microorganisms mineralizing SOM is integral for dynamics. Here we investigate how CUE affected by temperature, metabolic conditions, and molecular complexity substrate. We incubated O-horizon samples (with either 13C–glucose or 13C–cellulose) from boreal coniferous forest at 4, 9, 14, 19 °C, calculated CUEs based on amount 13C–CO2 13C–labelled microbial biomass...
Abstract Despite the widely held assumption that trees negatively affect local water budget in densely planted tree plantations, we still lack a clear understanding of underlying processes by which canopy cover influences soil dynamics more open, humid tropical ecosystems. In this study, propose new conceptual model uses combination stable isotope and moisture measurements throughout profile to assess potential mechanisms evaporation (of surface canopy‐intercepted rainfall) affects...
Abstract The global movement for ecosystem restoration has gained momentum in response to the Bonn Challenge (2010) and UN Decade on Ecosystem Restoration (UNDER, 2021–2030). While several science‐based guidelines exist aid achieving successful outcomes, significant variation remains outcomes of projects. Some this disparity can be attributed unexpected responses components planned interventions. Given complex nature ecosystems, we propose that concepts from Complex Systems Science (CSS) are...
Abstract The global soil carbon pool is approximately three times larger than the contemporary atmospheric pool, therefore even minor changes to its integrity may have major implications for CO 2 concentrations. While theory predicts that chemical composition of organic matter should constitute a master control on temperature response decomposition, this relationship has not yet been fully demonstrated. We used laboratory incubations forest ( SOM ) and fresh litter material together with NMR...
This study assessed the structure and composition of a Miombo woodland stand subjected to selective logging through forest inventory, measuring all trees with DBH ≥ 10 cm across 34 plots (1 ha each) for diameter, height, stem quality, health status. The had mean density 255 stems/ha, basal area 15 m2/ha, above ground biomass 110 Mg/ha, total volume 145 m3/ha. Fabaceae family, particularly Brachystegia spiciformis, dominated composition. Diversity indices revealed moderate diversity (Shannon...
Boreal forests, characterized by distinct winter seasons, store a large proportion of the global terrestrial carbon (C) pool. We studied summer soil C-dynamics in boreal forest northern Sweden using seven-year experimental manipulation frost. found that climate conditions play major role controlling dissolution/mineralization organic-C following season. Intensified frost led to significantly higher concentrations dissolved organic (DOC). also rates basal heterotrophic CO2 production surface...
Abstract. Thirty-two watersheds (31–4350 km2), in the Blue Nile Basin, Ethiopia, were hydrologically characterized with data from a study of water and land resources by US Department Interior, Bureau Reclamation (USBR) published 1964. The USBR document contains on flow, topography, geology, soil type, use for period 1959 to 1963. aim was identify watershed variables best explaining variation hydrological regime, special focus low flows. Moreover, this aimed that may be susceptible management...
Abstract. Much of the native forest in highlands western Kenya has been converted to agricultural land order feed growing population, and more is being cleared. In tropical Africa, this use change results progressive soil degradation, as period cultivation increases. Both rates variation infiltration, carbon concentration other parameters are influenced by management within systems, but they have rarely well documented East Africa. We constructed a chronosequence for an area Kenya, using two...