Overstory dynamics regulate the spatial variability in forest-floor CO2 fluxes across a managed boreal forest landscape

Overstory dynamics regulate the spatial variability in forest-floor CO2 fluxes across a managed boreal forest landscape. Martínez-García, E., Nilsson, M. B, Laudon, H., Lundmark, T., Fransson, J. E S, Wallerman, J., & Peichl, M. Agricultural and Forest Meteorology, 318:108916, 2022.

Paper doi abstract bibtex

The forest-floor represents an important interface for various carbon dioxide (CO2) fluxes, however, our knowledge of their variability and drivers across a managed boreal forest landscape is limited. Here, we used a three-year (2016−2018) data set of biometric- and chamber-based flux measurements to investigate the net forest-floor CO2 exchange (NEff) and its component fluxes across 50 forest stands spanning different soil types, tree species, and age classes within a 68 km2 boreal catchment in Sweden. We found that the forest-floor acted as a net CO2 source with the 10th–90th percentile (used hereafter for describing reported variations) ranging from 149 to 399 g C m−2 yr−1. Among the key landscape attributes, stand age strongly affected most NEff component fluxes, whereas tree species and soil type effects were weak and absent, respectively. Specifically, forest-floor net CO2 emissions increased with stand age due to declining understory gross and net primary production, ranging between 77–275 and 49–163 g C m−2 yr−1, respectively. Furthermore, we observed higher understory production rates in pine than in spruce stands. Across the 50 stands, the total forest-floor respiration ranged between 340 and 549 g C m−2 yr−1 and its spatial variation was primarily regulated by its autotrophic components, i.e., understory and tree root respiration, which displayed divergent increasing and decreasing age-related trends, respectively. Furthermore, heterotrophic soil respiration remained within a relatively narrow range (154–290 g C m−2 yr−1), possibly owing to compensating gradients in forest-floor properties. We further identified tree biomass as the major driver of the landscape-scale variations of CO2 fluxes, likely attributable to modulating effects on forest-floor resource availability and growing conditions. This implies that tree growth responses to forest management and global change will be particularly important for regulating magnitudes and spatial variations of forest-floor CO2 fluxes in boreal forests.

@Article{MARTINEZGARCIA2022108916,
  author   = {Mart{\'{i}}nez-Garc{\'{i}}a, Eduardo and Nilsson, Mats B and Laudon, Hjalmar and Lundmark, Tomas and Fransson, Johan E S and Wallerman, J{\"{o}}rgen and Peichl, Matthias},
  journal  = {Agricultural and Forest Meteorology},
  title    = {{Overstory dynamics regulate the spatial variability in forest-floor CO2 fluxes across a managed boreal forest landscape}},
  year     = {2022},
  issn     = {0168-1923},
  pages    = {108916},
  volume   = {318},
  abstract = {The forest-floor represents an important interface for various carbon dioxide (CO2) fluxes, however, our knowledge of their variability and drivers across a managed boreal forest landscape is limited. Here, we used a three-year (2016−2018) data set of biometric- and chamber-based flux measurements to investigate the net forest-floor CO2 exchange (NEff) and its component fluxes across 50 forest stands spanning different soil types, tree species, and age classes within a 68 km2 boreal catchment in Sweden. We found that the forest-floor acted as a net CO2 source with the 10th–90th percentile (used hereafter for describing reported variations) ranging from 149 to 399 g C m−2 yr−1. Among the key landscape attributes, stand age strongly affected most NEff component fluxes, whereas tree species and soil type effects were weak and absent, respectively. Specifically, forest-floor net CO2 emissions increased with stand age due to declining understory gross and net primary production, ranging between 77–275 and 49–163 g C m−2 yr−1, respectively. Furthermore, we observed higher understory production rates in pine than in spruce stands. Across the 50 stands, the total forest-floor respiration ranged between 340 and 549 g C m−2 yr−1 and its spatial variation was primarily regulated by its autotrophic components, i.e., understory and tree root respiration, which displayed divergent increasing and decreasing age-related trends, respectively. Furthermore, heterotrophic soil respiration remained within a relatively narrow range (154–290 g C m−2 yr−1), possibly owing to compensating gradients in forest-floor properties. We further identified tree biomass as the major driver of the landscape-scale variations of CO2 fluxes, likely attributable to modulating effects on forest-floor resource availability and growing conditions. This implies that tree growth responses to forest management and global change will be particularly important for regulating magnitudes and spatial variations of forest-floor CO2 fluxes in boreal forests.},
  doi      = {https://doi.org/10.1016/j.agrformet.2022.108916},
  keywords = {Carbon dioxide exchange, Forest-floor, Landscape variability, Primary production, Respiration,Boreal forest},
  url      = {https://www.sciencedirect.com/science/article/pii/S0168192322001095},
}

Downloads: 0

{"_id":"CPfeG35rdXXWHeQSq","bibbaseid":"martinezgarcia-nilsson-laudon-lundmark-fransson-wallerman-peichl-overstorydynamicsregulatethespatialvariabilityinforestfloorco2fluxesacrossamanagedborealforestlandscape-2022","author_short":["Martínez-García, E.","Nilsson, M. B","Laudon, H.","Lundmark, T.","Fransson, J. E S","Wallerman, J.","Peichl, M."],"bibdata":{"bibtype":"article","type":"article","author":[{"propositions":[],"lastnames":["Martínez-García"],"firstnames":["Eduardo"],"suffixes":[]},{"propositions":[],"lastnames":["Nilsson"],"firstnames":["Mats","B"],"suffixes":[]},{"propositions":[],"lastnames":["Laudon"],"firstnames":["Hjalmar"],"suffixes":[]},{"propositions":[],"lastnames":["Lundmark"],"firstnames":["Tomas"],"suffixes":[]},{"propositions":[],"lastnames":["Fransson"],"firstnames":["Johan","E","S"],"suffixes":[]},{"propositions":[],"lastnames":["Wallerman"],"firstnames":["Jörgen"],"suffixes":[]},{"propositions":[],"lastnames":["Peichl"],"firstnames":["Matthias"],"suffixes":[]}],"journal":"Agricultural and Forest Meteorology","title":"Overstory dynamics regulate the spatial variability in forest-floor CO2 fluxes across a managed boreal forest landscape","year":"2022","issn":"0168-1923","pages":"108916","volume":"318","abstract":"The forest-floor represents an important interface for various carbon dioxide (CO2) fluxes, however, our knowledge of their variability and drivers across a managed boreal forest landscape is limited. Here, we used a three-year (2016−2018) data set of biometric- and chamber-based flux measurements to investigate the net forest-floor CO2 exchange (NEff) and its component fluxes across 50 forest stands spanning different soil types, tree species, and age classes within a 68 km2 boreal catchment in Sweden. We found that the forest-floor acted as a net CO2 source with the 10th–90th percentile (used hereafter for describing reported variations) ranging from 149 to 399 g C m−2 yr−1. Among the key landscape attributes, stand age strongly affected most NEff component fluxes, whereas tree species and soil type effects were weak and absent, respectively. Specifically, forest-floor net CO2 emissions increased with stand age due to declining understory gross and net primary production, ranging between 77–275 and 49–163 g C m−2 yr−1, respectively. Furthermore, we observed higher understory production rates in pine than in spruce stands. Across the 50 stands, the total forest-floor respiration ranged between 340 and 549 g C m−2 yr−1 and its spatial variation was primarily regulated by its autotrophic components, i.e., understory and tree root respiration, which displayed divergent increasing and decreasing age-related trends, respectively. Furthermore, heterotrophic soil respiration remained within a relatively narrow range (154–290 g C m−2 yr−1), possibly owing to compensating gradients in forest-floor properties. We further identified tree biomass as the major driver of the landscape-scale variations of CO2 fluxes, likely attributable to modulating effects on forest-floor resource availability and growing conditions. This implies that tree growth responses to forest management and global change will be particularly important for regulating magnitudes and spatial variations of forest-floor CO2 fluxes in boreal forests.","doi":"https://doi.org/10.1016/j.agrformet.2022.108916","keywords":"Carbon dioxide exchange, Forest-floor, Landscape variability, Primary production, Respiration,Boreal forest","url":"https://www.sciencedirect.com/science/article/pii/S0168192322001095","bibtex":"@Article{MARTINEZGARCIA2022108916,\n author = {Mart{\\'{i}}nez-Garc{\\'{i}}a, Eduardo and Nilsson, Mats B and Laudon, Hjalmar and Lundmark, Tomas and Fransson, Johan E S and Wallerman, J{\\\"{o}}rgen and Peichl, Matthias},\n journal = {Agricultural and Forest Meteorology},\n title = {{Overstory dynamics regulate the spatial variability in forest-floor CO2 fluxes across a managed boreal forest landscape}},\n year = {2022},\n issn = {0168-1923},\n pages = {108916},\n volume = {318},\n abstract = {The forest-floor represents an important interface for various carbon dioxide (CO2) fluxes, however, our knowledge of their variability and drivers across a managed boreal forest landscape is limited. Here, we used a three-year (2016−2018) data set of biometric- and chamber-based flux measurements to investigate the net forest-floor CO2 exchange (NEff) and its component fluxes across 50 forest stands spanning different soil types, tree species, and age classes within a 68 km2 boreal catchment in Sweden. We found that the forest-floor acted as a net CO2 source with the 10th–90th percentile (used hereafter for describing reported variations) ranging from 149 to 399 g C m−2 yr−1. Among the key landscape attributes, stand age strongly affected most NEff component fluxes, whereas tree species and soil type effects were weak and absent, respectively. Specifically, forest-floor net CO2 emissions increased with stand age due to declining understory gross and net primary production, ranging between 77–275 and 49–163 g C m−2 yr−1, respectively. Furthermore, we observed higher understory production rates in pine than in spruce stands. Across the 50 stands, the total forest-floor respiration ranged between 340 and 549 g C m−2 yr−1 and its spatial variation was primarily regulated by its autotrophic components, i.e., understory and tree root respiration, which displayed divergent increasing and decreasing age-related trends, respectively. Furthermore, heterotrophic soil respiration remained within a relatively narrow range (154–290 g C m−2 yr−1), possibly owing to compensating gradients in forest-floor properties. We further identified tree biomass as the major driver of the landscape-scale variations of CO2 fluxes, likely attributable to modulating effects on forest-floor resource availability and growing conditions. This implies that tree growth responses to forest management and global change will be particularly important for regulating magnitudes and spatial variations of forest-floor CO2 fluxes in boreal forests.},\n doi = {https://doi.org/10.1016/j.agrformet.2022.108916},\n keywords = {Carbon dioxide exchange, Forest-floor, Landscape variability, Primary production, Respiration,Boreal forest},\n url = {https://www.sciencedirect.com/science/article/pii/S0168192322001095},\n}\n\n","author_short":["Martínez-García, E.","Nilsson, M. B","Laudon, H.","Lundmark, T.","Fransson, J. E S","Wallerman, J.","Peichl, M."],"key":"MARTINEZGARCIA2022108916","id":"MARTINEZGARCIA2022108916","bibbaseid":"martinezgarcia-nilsson-laudon-lundmark-fransson-wallerman-peichl-overstorydynamicsregulatethespatialvariabilityinforestfloorco2fluxesacrossamanagedborealforestlandscape-2022","role":"author","urls":{"Paper":"https://www.sciencedirect.com/science/article/pii/S0168192322001095"},"keyword":["Carbon dioxide exchange","Forest-floor","Landscape variability","Primary production","Respiration","Boreal forest"],"metadata":{"authorlinks":{}}},"bibtype":"article","biburl":"https://bibbase.org/network/files/TLd3uikK9J7eo5bBg","dataSources":["7X9iNW8s2TZStjYhZ","WQfw4bbzH25i62GQc"],"keywords":["carbon dioxide exchange","forest-floor","landscape variability","primary production","respiration","boreal forest"],"search_terms":["overstory","dynamics","regulate","spatial","variability","forest","floor","co2","fluxes","managed","boreal","forest","landscape","martínez-garcía","nilsson","laudon","lundmark","fransson","wallerman","peichl"],"title":"Overstory dynamics regulate the spatial variability in forest-floor CO2 fluxes across a managed boreal forest landscape","year":2022}