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Timing of forest fine root production advances with reduced snow cover in northern Japan : implications for climate-induced change in understory and overstory competition
| Title: | Timing of forest fine root production advances with reduced snow cover in northern Japan : implications for climate-induced change in understory and overstory competition |
| Authors: | Fukuzawa, Karibu Browse this author →KAKEN DB | | Tateno, Ryunosuke Browse this author →KAKEN DB | | Ugawa, Shin Browse this author →KAKEN DB | | Watanabe, Tsunehiro Browse this author | | Hosokawa, Nanae Browse this author →KAKEN DB | | Imada, Shogo Browse this author →KAKEN DB | | Shibata, Hideaki Browse this author →KAKEN DB |
| Keywords: | Snow removal | | Soil freezing | | Fine root mortality | | Growing season | | Root scanner |
| Issue Date: | 23-Apr-2021 |
| Publisher: | Springer |
| Journal Title: | Oecologia |
| Volume: | 196 |
| Start Page: | 263 |
| End Page: | 273 |
| Publisher DOI: | 10.1007/s00442-021-04914-x |
| Abstract: | To investigate the effect of reduced snow cover on fine root dynamics in a cool-temperate forest in northern Japan because of decreases in snowfall at high latitudes due to global warming, we monitored root length, production, and mortality before and after snow removal with an in-ground root scanner. We measured root dynamics of both overstory deciduous oak (Quercus crispula) and understory evergreen dwarf bamboo (Sasa nipponica), the two major species in the forest. Snow removal advanced the timing of peak root production by a month both in total and in Sasa, but not in oak. There was a significant interaction between snow removal and plant form on root production; this indicates that enhanced Sasa root production following snow removal might increase its ability to compete with oak. In contrast, snow removal did not enhance root mor-tality, suggesting that the roots of these species tolerate soil freezing. The earlier snow disappearance in the snow removal plot expanded the growing season in Sasa. We speculate that this change in the understory environment would advance the timing of root production by Sasa by extending the photosynthetic period in spring. We propose that different responses of root production to reduced snow cover between the two species would change the competitive interactions of overstory and understory vegetation, influencing net primary production and biogeochemistry (e.g., carbon and nitrogen cycles) in the forest ecosystem. |
| Rights: | This is a post-peer-review, pre-copyedit version of an article published in Oecologia. The final authenticated version is available online at: http://dx.doi.org/10.1007/s00442-021-04914-x |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/85066 |
| Appears in Collections: | 北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 福澤 加里部
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