A5045621625- Peatlands and Wetlands Ecology
- Lichen and fungal ecology
- Soil Carbon and Nitrogen Dynamics
- Climate change and permafrost
- Bryophyte Studies and Records
- Microbial Community Ecology and Physiology
- Biocrusts and Microbial Ecology
- Polar Research and Ecology
- Coastal wetland ecosystem dynamics
- Cryospheric studies and observations
- Botany and Plant Ecology Studies
- Protist diversity and phylogeny
- Legume Nitrogen Fixing Symbiosis
- Plant Ecology and Soil Science
- Land Use and Ecosystem Services
- Wastewater Treatment and Nitrogen Removal
- Mycorrhizal Fungi and Plant Interactions
- Plant and animal studies
- Planetary Science and Exploration
- Plant nutrient uptake and metabolism
- Plant Diversity and Evolution
- Indigenous Studies and Ecology
- Wildlife-Road Interactions and Conservation
- Conservation, Biodiversity, and Resource Management
- Urban Heat Island Mitigation
University of Copenhagen
2016-2025
Capital Region of Denmark
2024
Ecological Society of America
2020
John Wiley & Sons (United States)
2020
Bangor University
2013-2014
Lund University
2013-2014
The biological fixation of atmospheric nitrogen (N) is a major pathway for available N entering ecosystems. In N-limited boreal forests, significant amount N2 fixed by cyanobacteria living in association with mosses, contributing up to 50 % the total input. this review, we synthesize reports on drivers feather moss-cyanobacteria associations gain deeper understanding their role ecosystem-N-cycling. Nitrogen inhibited inputs and therefore, occurs only low N-deposition areas. While it has been...
Half the global soil carbon (C) is held in high-latitude systems. Climate change will expose these to warming and a shift towards plant communities with more labile C input. Labile can also increase rate of loss native organic matter (SOM); phenomenon termed 'priming'. We investigated how (+1.1 °C over ambient using open top chambers) litter addition (90 g m-2 yr-1 ) treatments subarctic influenced susceptibility SOM mineralization priming, its microbial underpinnings. appeared inhibit from...
Summary Biological nitrogen fixation ( BNF ) performed by moss‐associated cyanobacteria is one of the main sources new (N) input in pristine, high‐latitude ecosystems. Yet, nutrients that limit remain elusive. Here, we tested whether this important ecosystem function limited availability molybdenum (Mo), phosphorus (P), or both. dominant mosses was measured with acetylene reduction assay ARA at different time intervals following Mo and P additions, both laboratory microcosms from a boreal...
In some places, N2O emissions have doubled during the last 2-3 decades. Therefore, it is crucial to identify emission hotspots from terrestrial and aquatic systems. Large variation in occur managed as well natural areas. Natural unmanaged tropical subtropical wet forests are important sources globally. Emission hotspots, often coupled human activities, vary across climate zones, whereas most a few kg N ha−1 year−1 arable soils, drained organic soils boreal temperate zones release 20–30...
Nitrogen (N) fixation in moss-associated cyanobacteria is one of the main sources available N for N-limited ecosystems such as subarctic tundra. Yet, N2 mosses strongly influenced by soil moisture and temperature. Thus, temporal scaling up low-frequency situ measurements to several weeks, months or even entire growing season without taking into account changes abiotic conditions cannot capture variation fixation. We therefore aimed estimate throughout snow-free period tundra field...
Abstract Biological nitrogen (N 2 ) fixation is one of the main sources available N for pristine ecosystems such as subarctic and arctic tundra. Although this has been acknowledged more than a decade ago, few attempts have undertaken to identify foremost driver in high Arctic. Here, we report results from situ measurements throughout growing period (June–August) tundra, Greenland, climate change treatments, shading warming, control. Nitrogen was also measured cores that received additional...
Abstract Mosses are non-vascular plants usually found in moist and shaded areas, with great ecological importance several ecosystems. This is especially true northern latitudes, where mosses responsible for up to 100% of primary production some establish symbiotic associations unique bacteria that play key roles the carbon nitrogen cycles. For instance, boreal environments, more than 35% fixed by diazotrophic symbionts peatlands transferred mosses, directly affecting fixation hosts, while...
Summary Nonvascular photoautotrophs (NVP), including bryophytes, lichens, terrestrial algae, and cyanobacteria, are increasingly recognized as being essential to ecosystem functioning in many regions of the world. Current research suggests that climate change may pose a substantial threat NVP, but extent which this will affect associated functions services is highly uncertain. Here, we propose agenda address urgent question, focusing on physiological ecological processes link NVP while also...
Determining the abundance of N isotope (δ15 N) in natural environments is a simple but powerful method for providing integrated information on cycling dynamics and status an ecosystem under exogenous inputs. However, whether input different compounds could differently impact plant growth their 15 signatures remains unclear. Here, response three dominant plants (Leymus chinensis, Carex duriuscula, Thermopsis lanceolata) to addition (NH4 HCO3 , urea, NH4 NO3 ) at multiple rates were assessed...
Termites host a gut microbiota of diverse and essential symbionts that enable specialization on dead plant material; an abundant, but nutritionally imbalanced food source. To supplement the severe shortage dietary nitrogen (N), some termite species make use diazotrophic bacteria to fix atmospheric (N2). Fungus-growing termites (subfamily Macrotermitinae) fungal exosymbiont (genus Termitomyces) provides digestive services main source for termites. This has been thought obviate need...
Climate change is exposing high-latitude systems to warming and a shift towards more shrub-dominated plant communities, resulting in increased leaf-litter inputs at the soil surface, labile root-derived organic matter (OM) input profile. Labile OM can stimulate mineralization of (SOM); phenomenon termed "priming." In N-poor subarctic soils, it hypothesized that microorganisms may "prime" SOM order acquire N (microbial N-mining). Increased with high C/N ratio might further exacerbate...
Cyanobacteria associated with mosses represent a main nitrogen (N) source in pristine, high-latitude and -altitude ecosystems due to their ability fix N2. However, despite progress made regarding moss-cyanobacteria associations, the factors driving large interspecific variation N2 fixation activity between moss species remain elusive. The aim of study was identify traits that determine cyanobacterial colonization thus activity.Four varying were used assess abundance correlate it...
Nitrogen (N) fixation in association with mosses could be a key source of new N tropical montane cloud forests since these maintain high humidity levels and stable temperatures, both which are important to fixation. Here, nutrient availability prominent control processes. However, the mechanisms extent controls, particularly at different successional stages, remains unknown date. To address this knowledge gap, we investigated impact N, phosphorus (P) molybdenum (Mo) additions on...
Nitrogen (N) fixation by cyanobacteria on mosses is a critical N source, particularly in moss-abundant and pristine ecosystems such as boreal forests, where it estimated to contribute over 50% of total ecosystem input. However, the upscaling these field estimates carries considerable uncertainty because they rely point sampling limited number species, which fails capture potential large spatial temporal variation fixation. As result, global pattern moss-associated remains poorly understood,...
Nitrogen (N) fixation is the main source of 'new' N for N-limited ecosystems like subarctic and arctic tundra. This crucial ecosystem function performed by a wide range N2 fixer (diazotroph) associations that could differ fundamentally in their timing amount release to soil. To assess importance different associative fixers cycling, we tracked 15N-N2 into four N2-fixer (with legume, lichen, free-living, moss) soil, microbial biomass non-diazotroph-associated plants 3 days 5 weeks after situ...
Mosses can be responsible for up to 100% of net primary production in arctic and subarctic tundra, their associations with diazotrophic cyanobacteria have an important role increasing nitrogen (N) availability these pristine ecosystems. Predictions about the consequences climate change environments point increased N mineralization soil higher litter deposition due warming. It is not clear yet how indirect effects impact moss-cyanobacteria N2 fixation. This work aimed evaluate input on...
Tropical montane cloud forests are high altitude ecosystems characterized by very ambient humidity, which favors organisms that depend on the environment for their water status, such as bryophytes and nitrogen-fixing symbionts. Bryophyte-associated N