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Distinct patterns of below- and aboveground growth phenology and litter carbon inputs along a boreal site type gradient

Ding, Yiyang and Leppalammi-Kujansuu, Jaana and Salemaa, Maija and Schiestl-Aalto, Pauliina and Kulmala, Liisa and Nojd, Pekka and Minkkinen, Kari and Makita, Naoki and Zeleznik, Peter and Merila, Paivi and Helmisaari, Helja-Sisko (2021). Distinct patterns of below- and aboveground growth phenology and litter carbon inputs along a boreal site type gradient. Forest Ecology and Management. 489 , 119081
[Research article]

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Abstract

Forest ecosystem productivity is strongly linked to site nutrient availability, which is influenced by litter inputs and their decomposition rates. Fine roots and mycelia are key contributors in belowground soil carbon (C) accumulation, but studies have seldom reported how belowground litter C input is related to site types in boreal forests. In this study, three mature and one young Pinus sylvestris forests along a site type gradient in southern Finland were chosen for measurements of fine root biomass, fine root longevity, below- and aboveground growth phenology and annual litter input from tree and understorey vegetation. Site types were distinguished by understorey vegetation composition, which indicated the site fertility. Fine root biomass per tree stand basal area decreased significantly from nutrient-poor to nutrient-rich sites, the nutrient-poor sites with longer fine root longevity resulted in an equal belowground litter input with the nutrient-rich site. Above- and belowground annual litter inputs were 131-236 and 70-91 g m(-2) year(-1), respectively. Aboveground litter increased with site fertility, resulting into belowground litter having a decreasing trend from 37% to 23% of total litter inputs with increasing site fertility. Ectomycorrhizal mycelia and understory production contributed 8-13% and 18-41% of belowground production, respectively. Contribution of understorey vegetation to the belowground litter C input was lower than that of trees at xeric and sub-xeric sites but equaled to that of trees at the mesic site. Our study showed distinct dimensions of below- and aboveground litter inputs influenced by site types. Moreover, we emphasize that the belowground C inputs from ectomycorrhizal mycelia and the understorey in addition to those of trees should always be considered in C balances and C reporting in boreal conifers.

Authors/Creators:Ding, Yiyang and Leppalammi-Kujansuu, Jaana and Salemaa, Maija and Schiestl-Aalto, Pauliina and Kulmala, Liisa and Nojd, Pekka and Minkkinen, Kari and Makita, Naoki and Zeleznik, Peter and Merila, Paivi and Helmisaari, Helja-Sisko
Title:Distinct patterns of below- and aboveground growth phenology and litter carbon inputs along a boreal site type gradient
Series Name/Journal:Forest Ecology and Management
Year of publishing :2021
Volume:489
Article number:119081
Number of Pages:11
Publisher:ELSEVIER
ISSN:0378-1127
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:Carbon allocation, Ectomycorrhizal mycelia, Fine root longevity, Minirhizotron, Pinus sylvestris, Soil fertility
URN:NBN:urn:nbn:se:slu:epsilon-p-111643
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-111643
Additional ID:
Type of IDID
DOI10.1016/j.foreco.2021.119081
Web of Science (WoS)000636266800002
ID Code:23379
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:29 Apr 2021 12:23
Metadata Last Modified:29 Apr 2021 12:31

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