How does forest fertilization influence tree productivity of boreal forests? An analysis of data from commercial forestry across Sweden

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 373, P. 124023 - 124023

Published: Jan. 1, 2025

Forest fertilization is a forest management practice that often claimed to increase productivity in boreal forests. Although regarded as an efficient way profitability, it also costly, and associated with risks such biodiversity loss nitrogen leaching from the soil. To be both cost-efficient sustainable, potential enhanced due should balanced against adverse environmental impact. One effective strategy limit sites where can most significantly tree productivity, while avoiding application less suitable areas. However, current understanding of specific conditions under which optimally stimulates growth limited. clarify this, we analysed standing volume 32,498 recently harvested fertilized unfertilized stands Sweden's largest owner. We applied generalized additive models quantify effect on at harvest how depended dominant species, stand characteristics (site index, stem density), climatic (temperature sum), (thinning, age harvest). found operational was highly context-dependent. In pine-dominated stands, failed volumes cold climates low-productive stands. spruce-dominated did not result increased high-productive For more sustainable this suggest context dependency efficiency given attention. Hence, recommend refrain fertilizing situated land or regions climates, those northern Sweden.

Language: Английский

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Ectomycorrhizal fungi explain more variation in rhizosphere nutrient availability than root traits in temperate forests

Applied Soil Ecology, Journal Year: 2025, Volume and Issue: 207, P. 105923 - 105923

Published: Feb. 5, 2025

Language: Английский

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The biological controls of soil carbon accumulation following wildfire and harvest in boreal forests: A review

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(5)

Published: April 29, 2024

Abstract Boreal forests are frequently subjected to disturbances, including wildfire and clear‐cutting. While these disturbances can cause soil carbon (C) losses, the long‐term accumulation dynamics of C stocks during subsequent stand development is controlled by biological processes related balance net primary production (NPP) outputs via heterotrophic respiration leaching, many which remain poorly understood. We review suggested influence in boreal forests. Our indicates that median rates following clear‐cutting similar (0.15 0.20 Mg ha −1 year , respectively), however, variation between studies extremely high. Further, while individual show linear increases through time after disturbance, there indications stock recovery fastest early mid‐succession (e.g. 15–80 years) then slows as mature >100 years). indicate rapid build‐up younger stands appears not only driven higher plant production, but also a high rate mycorrhizal hyphal suppression saprotrophs. As mature, reductions increasing litter recalcitrance, ectomycorrhizal decomposers saprotrophs have been highlighted key controls on rates. some appear well understood temporal patterns NPP, changes aboveground quality), others research frontiers. Notably, very little data exists describing comparing successional root functional traits, mycorrhizal‐saprotroph interactions, or dissolved organic different disturbances. argue less described require attention, they will be for understanding ecosystem balances, representing more accurately Earth system models.

Language: Английский

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Effects of Nitrogen Addition on Soil Aggregate Stability and Mycorrhizal Morphological Characteristics: Differential Responses of Arbuscular Mycorrhizal and Ectomycorrhizal Fungi

Forests, Journal Year: 2025, Volume and Issue: 16(2), P. 282 - 282

Published: Feb. 6, 2025

Soil aggregate stability plays a pivotal role in ecosystem functioning and carbon sequestration. Nitrogen deposition influences drives differential responses AM ECM fungi, yet the underlying mechanisms remain unclear. This study aimed to determine how N addition soil aggregation, mycorrhizal morphological characteristics, organic (SOC) across two types. A temperate forest experiment was conducted northeastern China using 12 plots subjected four treatments (control, low, medium, high). properties, traits, distributions were quantified. Relationships examined via correlation analyses, random models, structural equation modeling. enrichment substantially increased SOC water content, enhancing proportion of large aggregates (4–8 mm) elevating mean weight diameter (MWD) geometric (GMD), critical indicators stability. fungi exhibited stronger response than ECM, reflected greater hyphal development accumulation. content correlated positively with stability, whereas pH showed negative association. inputs enhance by promoting retention, demonstrating heightened sensitivity addition. These findings emphasize integral dynamics shaping stabilization under increasing deposition.

Language: Английский

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Responses of soil fungal and bacterial communities to long-term organic and inorganic nitrogenous fertilizers in an alpine agriculture

Applied Soil Ecology, Journal Year: 2024, Volume and Issue: 201, P. 105498 - 105498

Published: July 1, 2024

Language: Английский

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Impact of ectomycorrhizal symbiosis on root system architecture and nutrient absorption in Chinese chestnut and pecan seedlings

Plant and Soil, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

Language: Английский

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Dual Controls of Shrub Encroachment in Semiarid Grasslands: Ectomycorrhizal Fungi and Soil Nitrogen Cycling

Land Degradation and Development, Journal Year: 2025, Volume and Issue: unknown

Published: March 19, 2025

ABSTRACT Shrub encroachment significantly impacts biodiversity and ecosystem functions in grassland ecosystems. Soil microbial communities may play a key role this process. Previous studies have focused on plant competition soil abiotic factors, but the specific biological mechanisms by which microbiota drive shrub remained poorly understood. Through integrated vegetation surveys high‐throughput sequencing of across gradients Inner Mongolia, we assessed composition functional genes importance value. We found that value closely correlated with limited resources, including water nitrogen (N), during encroachment. Ectomycorrhizal (EcM) fungi were recruited semishrub Artemisia ordosica , increasing its competitiveness under conditions resource scarcity. Changes community affected N cycling reducing abundance involved fixation, nitrification, nitrate assimilation. Concurrently, shrubs preferred (NO 3 − ‐N) over herbaceous plants nutrient‐poor environments. The was facilitated EcM fungi, enabling them to thrive N‐deficient arid environments preferentially utilize NO ‐N. Our findings establish novel microbial‐mediated pathway driving encroachment, fungal symbionts enable host alleviate limitations through modified nutrient acquisition strategies. These results suggest targeted manipulation associations could inform restoration strategies shrub‐encroached grasslands highlight need for management approach accounts dynamics.

Language: Английский

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Mycorrhizal association shapes responses of plant biomass but not soil carbon to nitrogen addition in global forests

Forest Ecology and Management, Journal Year: 2025, Volume and Issue: 586, P. 122685 - 122685

Published: March 31, 2025

Language: Английский

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A trait spectrum linking nitrogen acquisition and carbon use of ectomycorrhizal fungi

New Phytologist, Journal Year: 2025, Volume and Issue: unknown

Published: April 5, 2025

Summary Trait spectra have been used in various branches of ecology to explain and predict patterns species distributions. Several categorical continuous traits proposed as relevant for ectomycorrhizal fungi, but a spectrum that unifies co‐varying remains be established tested. Here, we propose nitrogen acquisition carbon use trait fungi nitrogen‐limited forests, which encompasses several morphological, physiological, metabolic traits. Using simple stoichiometric model, the is linked concept apparent efficiency resolves contradiction with high supply host can maintain transfer despite building large mycelial biomass. We suggest fungal are distributed along this spectrum, lifestyles ranging from ‘absorbers’ niche productive forests availability soluble ‘miners’ ability exploit organic matter low availability. Further, ways test outlined empirically.

Language: Английский

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Fertilizer‐induced soil carbon rapidly disappears after clearcutting in boreal production forests

Journal of Applied Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: April 6, 2025

Abstract Forests have a substantial potential to contribute climate change mitigation, depending on how they are managed. Forest fertilization with nitrogen is used increase tree productivity in Fennoscandian forests, but it can also soil carbon stocks. However, such forests often harvested through clearcutting, practice known impact stocks, mineralization and biodiversity. To test whether fertilizer‐induced stocks persistent, we studied post‐clearcut respiration, growth, ground vegetation fungal communities 48 previously fertilized unfertilized production central Sweden. In the first year after clearcuts of stored 7 t (+30%) more 210 kg (+32%) per hectare organic layer than forests. Four 13 years there was no significant difference layer, or CO 2 efflux, between Saprotrophic ascomycetes were abundant independent time since clearcutting. Previous did neither result increased growth regenerating trees nor alter understory vegetation. Synthesis applications. Overall, carry‐over effects biodiversity from forest into stands clearcutting limited. We conclude that stores induced by short‐lived do not persist Consequently, mitigate likely limited increases aboveground biomass products be produced biomass. Our study raises questions about where added ended up—knowledge essential for making well‐informed decisions future strategies.

Language: Английский

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