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  • Martinez-Garcia, EduardoSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management,Swedish University of Agricultural Sciences, Sweden (author)

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

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • Elsevier,2022
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:lnu-114040
  • https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-114040URI
  • https://doi.org/10.1016/j.agrformet.2022.108916DOI
  • https://res.slu.se/id/publ/117267URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • 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.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Nilsson, MatsSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management,Swedish University of Agricultural Sciences, Sweden(Swepub:slu)47620 (author)
  • Laudon, HjalmarSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management,Swedish University of Agricultural Sciences, Sweden(Swepub:slu)48717 (author)
  • Lundmark, TomasSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management,Swedish University of Agricultural Sciences, Sweden(Swepub:slu)50171 (author)
  • Fransson, JohanSveriges lantbruksuniversitet,Linnéuniversitetet,Institutionen för skog och träteknik (SOT),Swedish University of Agricultural Sciences, Sweden,DISA;DISA-WBT,Institutionen för skoglig resurshushållning,Department of Forest Resource Management,Linnaeus University(Swepub:slu)49086 (author)
  • Wallerman, JörgenSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig resurshushållning,Department of Forest Resource Management,Swedish University of Agricultural Sciences, Sweden(Swepub:slu)47239 (author)
  • Peichl, MatthiasSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management,Swedish University of Agricultural Sciences, Sweden(Swepub:slu)48058 (author)
  • Sveriges lantbruksuniversitetInstitutionen för skogens ekologi och skötsel (creator_code:org_t)
  • Sveriges lantbruksuniversitet

Related titles

  • In:Agricultural and Forest Meteorology: Elsevier3180168-19231873-2240

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