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| Content Provider | Springer Nature Link |
|---|---|
| Author | Uchida, Masaki Kishimoto, Ayaka Muraoka, Hiroyuki Nakatsubo, Takayuki Kanda, Hiroshi Koizumi, Hiroshi |
| Copyright Year | 2009 |
| 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. |
| Starting Page | 79 |
| Ending Page | 85 |
| Page Count | 7 |
| File Format | |
| ISSN | 09189440 |
| Journal | Journal of Plant Research |
| Volume Number | 123 |
| Issue Number | 1 |
| e-ISSN | 16180860 |
| Language | English |
| Publisher | Springer Japan |
| Publisher Date | 2009-09-17 |
| Publisher Place | Japan |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Carbon dioxide Climate change High Arctic Moss Net ecosystem production Salix polaris Plant Biochemistry Plant Physiology Plant Ecology Plant Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science |
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