A5032893373- Soil Carbon and Nitrogen Dynamics
- Peatlands and Wetlands Ecology
- Ecology and Vegetation Dynamics Studies
- Fire effects on ecosystems
- Lichen and fungal ecology
- Forest Ecology and Biodiversity Studies
- Mycorrhizal Fungi and Plant Interactions
- Soil and Water Nutrient Dynamics
- Forest ecology and management
- Geology and Paleoclimatology Research
- Rangeland and Wildlife Management
- Seedling growth and survival studies
- Plant Water Relations and Carbon Dynamics
- Plant and animal studies
- Bioenergy crop production and management
- Bryophyte Studies and Records
- Forest Management and Policy
- Isotope Analysis in Ecology
- Botany and Plant Ecology Studies
- Microbial Community Ecology and Physiology
- Climate change and permafrost
- Biocrusts and Microbial Ecology
- Plant Parasitism and Resistance
- Tree-ring climate responses
- Crop Yield and Soil Fertility
Swedish University of Agricultural Sciences
2016-2025
Swedish Forest Agency
2018-2021
Patagonian Ecosystems Investigation Research Center
2015
Austral University of Chile
2015
University of Montana
2005-2006
Michigan Technological University
2002
Fire is the primary form of disturbance in temperate and boreal forest ecosystems. However, our knowledge biochemical mechanisms by which fire stimulates N cycling incomplete. Charcoal a major byproduct fires ubiquitous soils most ecosystems, yet biological function charcoal ecosystems has been greatly overlooked. We conducted suite laboratory experiments on from ponderosa pine ( Pinus Laws) forests to determine influence soil dynamics particular, nitrification. The addition NH 4 + had...
Soil organisms, including earthworms, are a key component of terrestrial ecosystems. However, little is known about their diversity, distribution, and the threats affecting them. We compiled global dataset sampled earthworm communities from 6928 sites in 57 countries as basis for predicting patterns abundance, biomass. found that local species richness abundance typically peaked at higher latitudes, displaying opposite to those observed aboveground organisms. high dissimilarity across...
Summary 1. Despite recent interest in linkages between above‐ and below‐ground communities their consequences for ecosystem processes, much remains unknown about responses to long‐term change. We synthesize multiple lines of evidence from a ‘natural experiment’ illustrate how retrogression (the decline process rates due absence major disturbance) drives vegetation change, thus above‐ground carbon (C) sequestration, consumer biota. 2. Our study system involves 30 islands Swedish boreal forest...
Biochar has gained global attention due to its potential for climate change mitigation and soil quality improvement. Yet, the consequences of biochar additions microbes -the major biotic drivers function- remain unknown across environmental gradients. We aimed explore responses bacterial communities addition, further investigate how properties impact these responses. conducted a meta-analysis found that, in general, limited on proportion phyla, with only Acidobacteria Gemmatimonadetes being...
Productivity in boreal ecosystems is primarily limited by available soil nitrogen (N), and there substantial interest understanding whether deposition of anthropogenically derived reactive (Nr) results greater N availability to woody vegetation, which could result carbon (C) sequestration. One factor that may limit the acquisition Nr plants presence bryophytes, are a significant C pool, location where associative cyanobacterial N-fixation occurs. Using replicated stand-scale N-addition...
Biological feedback mechanisms regulate fundamental ecosystem processes and potentially productivity. To date, no studies have documented the down-regulation of terrestrial nitrogen (N) fixation via an ecosystem-level mechanism. Herein, we demonstrate such a in boreal forests. Rapid cycling N early secondary succession forests yielded greater throughfall deposition, which turn decreased by cyanobacterial associates feather moss carpets that reside on forest floor. The canopy exerts tight...
Abstract It is proposed that carbon (C) sequestration in response to reactive nitrogen (N r ) deposition boreal forests accounts for a large portion of the terrestrial sink anthropogenic CO 2 emissions. While studies have helped clarify magnitude by which N enhances C forest vegetation, there remains paucity long‐term experimental evaluating how soil pools respond. We conducted experiment, maintained since 1996, consisting three addition levels (0, 12.5, and 50 kg ha −1 yr zone northern...
• Plant productivity is predicted to increase in northern latitudes as a result of climate warming; however, this may depend on whether biological nitrogen (N)-fixation also increases. We evaluated how the variation temperature and light affects N-fixation by two boreal feather mosses, Pleurozium schreberi Hylocomium splendens, which are primary source most environments. measured rates 2 4 wk after exposure factorial combination environments normal, intermediate high (16.3, 22.0 30.3°C)...
Studies evaluating plant-soil biota interactions in both native and introduced plant ranges are rare, thus far have lacked robust experimental designs to account for several potential confounding factors. Here, we investigated the effects of soil on growth Pinus contorta, which has been from Canada Sweden. Using Swedish Canadian soils, conducted two glasshouse experiments. The first experiment utilized unsterilized each country, with a full-factorial cross origin, tree provenance, fertilizer...
Abstract It is proposed that increases in anthropogenic reactive nitrogen (N r ) deposition may cause temperate and boreal forests to sequester a globally significant quantity of carbon (C); however, long‐term data from describing how C sequestration responds realistic levels chronic N are scarce. Using (14‐year) stand‐scale (0.1 ha) addition experiment (three levels: 0, 12.5, 50 kg ha −1 yr the zone northern Sweden, we evaluated additions altered uptake biomass understory communities,...
Fine roots, and their functional traits, influence associated rhizosphere microorganisms via root exudation litter quality. However, little information is known about relationship with microbial taxa guilds. We investigated the relationships of 11 fine traits 20 sub-arctic tundra meadow plant species soil community composition, using phospholipid fatty acids (PLFAs) high-throughput sequencing. primarily focused on economics spectrum, as it provides a useful framework to examine strategies by...
Abstract There is evidence that anthropogenic nitrogen (N) deposition enhances carbon (C) sequestration in boreal forest soils. However, it unclear how free‐living saprotrophs (bacteria and fungi, SAP) ectomycorrhizal (EM) fungi responses to N addition impact soil C dynamics. Our aim was investigate SAP EM communities are impacted by enrichment estimate whether these changes influence decay of litter humus. We conducted a long‐term experiment northern Sweden, maintained since 2004,...
Abstract Biochar has the potential to mitigate impacts of climate change and soil degradation by simultaneously sequestering C in improving quality. However, mechanism biochar's effect on microbial communities remains unclear. Therefore, we conducted a global meta‐analysis, where collected 2,110 paired observations from 107 published papers used structural equation modeling (SEM) analyze effects biochar community structure function. Our result indicated that arbuscular mycorrhizal fungal...
Abstract Feedback between plants and their associated soil biota is an important driver of plant distribution, abundance community composition with consequences for ecosystem functioning. The field plant‐soil feedback (PSF) research has become integral subdiscipline terrestrial ecology, in recent decades rapidly evolved by deepening broadening its scope. We review the major developments field, discuss methodological considerations present a way forward new approaches to PSF that will lead...