Seasonal shift in factors controlling net ecosystem production in a high Arctic terrestrial ecosystem

Masaki Uchida, Ayaka Kishimoto, Hiroyuki Muraoka, Takayuki Nakatsubo, Hiroshi Kanda, Hiroshi Koizumi

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    We examined factors controlling temporal changes in net ecosystem production (NEP) in a high Arctic polar semi-desert ecosystem in the snow-free season. We examined the relationships between NEP and biotic and abiotic factors in a dominant plant community (Salix polaris-moss) in the Norwegian high Arctic. Just after snowmelt in early July, the ecosystem released CO2 into the atmosphere. A few days after snowmelt, however, the ecosystem became a CO2 sink as the leaves of S. polaris developed. Diurnal changes in NEP mirrored changes in light incidence (photosynthetic photon flux density, PPFD) in summer. NEP was significantly correlated with PPFD when S. polaris had fully developed leaves, i. e., high photosynthetic activity. In autumn, NEP values decreased as S. polaris underwent senescence. During this time, CO2 was sometimes released into the atmosphere. In wet conditions, moss made a larger contribution to NEP. In fact, the water content of the moss regulated NEP during autumn. Our results indicate that the main factors controlling NEP in summer are coverage and growth of S. polaris, PPFD, and precipitation. In autumn, the main factor controlling NEP is moss water content.

    Original languageEnglish
    Pages (from-to)79-85
    Number of pages7
    JournalJournal of Plant Research
    Volume123
    Issue number1
    DOIs
    Publication statusPublished - 2010 Jan

    Fingerprint

    net ecosystem production
    Arctic region
    mosses and liverworts
    snowmelt
    autumn
    ecosystems
    water content
    terrestrial ecosystems
    wet environmental conditions
    summer
    Salix
    angle of incidence
    snow
    leaves
    deserts
    plant communities
    environmental factors

    Keywords

    • Carbon dioxide
    • Climate change
    • High Arctic
    • Moss
    • Net ecosystem production
    • Salix polaris

    ASJC Scopus subject areas

    • Plant Science

    Cite this

    Seasonal shift in factors controlling net ecosystem production in a high Arctic terrestrial ecosystem. / Uchida, Masaki; Kishimoto, Ayaka; Muraoka, Hiroyuki; Nakatsubo, Takayuki; Kanda, Hiroshi; Koizumi, Hiroshi.

    In: Journal of Plant Research, Vol. 123, No. 1, 01.2010, p. 79-85.

    Research output: Contribution to journalArticle

    Uchida, M, Kishimoto, A, Muraoka, H, Nakatsubo, T, Kanda, H & Koizumi, H 2010, 'Seasonal shift in factors controlling net ecosystem production in a high Arctic terrestrial ecosystem', Journal of Plant Research, vol. 123, no. 1, pp. 79-85. https://doi.org/10.1007/s10265-009-0260-6
    Uchida, Masaki ; Kishimoto, Ayaka ; Muraoka, Hiroyuki ; Nakatsubo, Takayuki ; Kanda, Hiroshi ; Koizumi, Hiroshi. / Seasonal shift in factors controlling net ecosystem production in a high Arctic terrestrial ecosystem. In: Journal of Plant Research. 2010 ; Vol. 123, No. 1. pp. 79-85.
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