The carbon sequestration response of aboveground biomass and soils to nutrient enrichment in boreal forests depends on baseline site productivity. Blaško, R., Forsmark, B., Gundale, M. J., Lim, H., Lundmark, T., & Nordin, A. Science of The Total Environment, 838:156327, September, 2022. ![The carbon sequestration response of aboveground biomass and soils to nutrient enrichment in boreal forests depends on baseline site productivity [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Nutrient enrichment can alleviate productivity limitations and thus substantially increase carbon (C) uptake in northern coniferous forests. Yet, factors controlling stand-to-stand variation of forest ecosystem responses to nutrient enrichment remain unclear. We used five long-term (13 years) nutrient-enrichment experiments across Sweden, where nitrogen (N), phosphorus, and potassium were applied annually to young Norway spruce forests that varied in their baseline ecosystem properties. We measured tree biomass and soil C and N stocks, litterfall C inputs, soil CO2 efflux, and shifts in composition and biomass of soil microbial communities to understand the links between above and belowground responses to nutrient enrichment. We found that the strongest responses in tree biomass occurred when baseline site productivity was lowest. High increases in tree biomass C stocks were generally balanced by weaker responses in organic soil C stocks. The average ecosystem C–N response rate was 35 kg C kg−1 N added, with a nearly five-fold greater response rate in tree biomass than in soil. The positive nutrient enrichment effects on ecosystem C sinks were driven by a 95% increase in tree biomass C stocks, 150% increase in litter production, 67% increase in organic layer C stocks, and a 46% reduction in soil CO2 efflux accompanied by compositional changes in soil microbial communities. Our results show that ecosystem C uptake in spruce forests in northern Europe can be substantially enhanced by nutrient enrichment; however, the strength of the responses and whether the enhancement occurs mainly in tree biomass or soils are dependent on baseline forest productivity.
@article{blasko_carbon_2022,
title = {The carbon sequestration response of aboveground biomass and soils to nutrient enrichment in boreal forests depends on baseline site productivity},
volume = {838},
issn = {0048-9697},
url = {https://www.sciencedirect.com/science/article/pii/S0048969722034246},
doi = {10.1016/j.scitotenv.2022.156327},
abstract = {Nutrient enrichment can alleviate productivity limitations and thus substantially increase carbon (C) uptake in northern coniferous forests. Yet, factors controlling stand-to-stand variation of forest ecosystem responses to nutrient enrichment remain unclear. We used five long-term (13 years) nutrient-enrichment experiments across Sweden, where nitrogen (N), phosphorus, and potassium were applied annually to young Norway spruce forests that varied in their baseline ecosystem properties. We measured tree biomass and soil C and N stocks, litterfall C inputs, soil CO2 efflux, and shifts in composition and biomass of soil microbial communities to understand the links between above and belowground responses to nutrient enrichment. We found that the strongest responses in tree biomass occurred when baseline site productivity was lowest. High increases in tree biomass C stocks were generally balanced by weaker responses in organic soil C stocks. The average ecosystem C–N response rate was 35 kg C kg−1 N added, with a nearly five-fold greater response rate in tree biomass than in soil. The positive nutrient enrichment effects on ecosystem C sinks were driven by a 95\% increase in tree biomass C stocks, 150\% increase in litter production, 67\% increase in organic layer C stocks, and a 46\% reduction in soil CO2 efflux accompanied by compositional changes in soil microbial communities. Our results show that ecosystem C uptake in spruce forests in northern Europe can be substantially enhanced by nutrient enrichment; however, the strength of the responses and whether the enhancement occurs mainly in tree biomass or soils are dependent on baseline forest productivity.},
language = {en},
urldate = {2022-06-30},
journal = {Science of The Total Environment},
author = {Blaško, Róbert and Forsmark, Benjamin and Gundale, Michael J. and Lim, Hyungwoo and Lundmark, Tomas and Nordin, Annika},
month = sep,
year = {2022},
keywords = {Ecosystem carbon stocks, Litterfall, Soil carbon, Soil microbial community, Soil nitrogen, Soil respiration},
pages = {156327},
}
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We used five long-term (13 years) nutrient-enrichment experiments across Sweden, where nitrogen (N), phosphorus, and potassium were applied annually to young Norway spruce forests that varied in their baseline ecosystem properties. We measured tree biomass and soil C and N stocks, litterfall C inputs, soil CO2 efflux, and shifts in composition and biomass of soil microbial communities to understand the links between above and belowground responses to nutrient enrichment. We found that the strongest responses in tree biomass occurred when baseline site productivity was lowest. High increases in tree biomass C stocks were generally balanced by weaker responses in organic soil C stocks. The average ecosystem C–N response rate was 35 kg C kg−1 N added, with a nearly five-fold greater response rate in tree biomass than in soil. The positive nutrient enrichment effects on ecosystem C sinks were driven by a 95% increase in tree biomass C stocks, 150% increase in litter production, 67% increase in organic layer C stocks, and a 46% reduction in soil CO2 efflux accompanied by compositional changes in soil microbial communities. Our results show that ecosystem C uptake in spruce forests in northern Europe can be substantially enhanced by nutrient enrichment; however, the strength of the responses and whether the enhancement occurs mainly in tree biomass or soils are dependent on baseline forest productivity.","language":"en","urldate":"2022-06-30","journal":"Science of The Total Environment","author":[{"propositions":[],"lastnames":["Blaško"],"firstnames":["Róbert"],"suffixes":[]},{"propositions":[],"lastnames":["Forsmark"],"firstnames":["Benjamin"],"suffixes":[]},{"propositions":[],"lastnames":["Gundale"],"firstnames":["Michael","J."],"suffixes":[]},{"propositions":[],"lastnames":["Lim"],"firstnames":["Hyungwoo"],"suffixes":[]},{"propositions":[],"lastnames":["Lundmark"],"firstnames":["Tomas"],"suffixes":[]},{"propositions":[],"lastnames":["Nordin"],"firstnames":["Annika"],"suffixes":[]}],"month":"September","year":"2022","keywords":"Ecosystem carbon stocks, Litterfall, Soil carbon, Soil microbial community, Soil nitrogen, Soil respiration","pages":"156327","bibtex":"@article{blasko_carbon_2022,\n\ttitle = {The carbon sequestration response of aboveground biomass and soils to nutrient enrichment in boreal forests depends on baseline site productivity},\n\tvolume = {838},\n\tissn = {0048-9697},\n\turl = {https://www.sciencedirect.com/science/article/pii/S0048969722034246},\n\tdoi = {10.1016/j.scitotenv.2022.156327},\n\tabstract = {Nutrient enrichment can alleviate productivity limitations and thus substantially increase carbon (C) uptake in northern coniferous forests. Yet, factors controlling stand-to-stand variation of forest ecosystem responses to nutrient enrichment remain unclear. We used five long-term (13 years) nutrient-enrichment experiments across Sweden, where nitrogen (N), phosphorus, and potassium were applied annually to young Norway spruce forests that varied in their baseline ecosystem properties. We measured tree biomass and soil C and N stocks, litterfall C inputs, soil CO2 efflux, and shifts in composition and biomass of soil microbial communities to understand the links between above and belowground responses to nutrient enrichment. We found that the strongest responses in tree biomass occurred when baseline site productivity was lowest. High increases in tree biomass C stocks were generally balanced by weaker responses in organic soil C stocks. The average ecosystem C–N response rate was 35 kg C kg−1 N added, with a nearly five-fold greater response rate in tree biomass than in soil. 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