Presence of understory dwarf bamboo determines ecosystem fine root production in a cool-temperate forest in northern Japan

Yanagawa, Sanae; Fukuzawa, Karibu; Takagi, Kentaro; Shibata, Hideaki; Satoh, Fuyuki

Presence of understory dwarf bamboo determines ecosystem fine root production in a cool-temperate forest in northern Japan

Yanagawa, Sanae; Fukuzawa, Karibu; Takagi, Kentaro et al.

Journal of Forest Research, 2023, 28(3), 177-185

Permalink : https://hdl.handle.net/2115/91247

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アクセス権	open access
URI	https://hdl.handle.net/2115/91247
タイトル	Presence of understory dwarf bamboo determines ecosystem fine root production in a cool-temperate forest in northern Japan
著者	Yanagawa, Sanae ; Fukuzawa, Karibu ; Takagi, Kentaro ; Shibata, Hideaki ; Satoh, Fuyuki
著者名 Yanagawa, Sanae
e-Rad_Researcher 10456824 著者名 Fukuzawa, Karibu
e-Rad_Researcher 20322844 著者名 Takagi, Kentaro
e-Rad_Researcher 70281798 著者名 Shibata, Hideaki
e-Rad_Researcher 20187230 著者名 Satoh, Fuyuki
言語	英語
キーワード	Fine root biomass
	species diversity
	sasa senanensis
	tree aboveground biomass
	soil nitrogen availability
発行日	2023-01-29
出版者	Taylor & Francis
収録物名	Journal of Forest Research
巻(号)	28(3)
ページ	177-185
抄録	Fine root biomass (FRB) and production (FRP) are crucial in forest carbon and nutrient cycling, but the factors controlling FRB and FRP are not well understood. Here, we examined FRB, FRP, aboveground environmental and stand factors, and soil environmental factors in four stands in a forest covered with dense understory vegetation of dwarf bamboo, Sasa senanensis (hereafter, Sasa). The four stands had different tree species composition and included a primary forest (PF), secondary forest (SF), conifer plantation (CP), and Sasa area (SA). We quantified the FRB and FRP of trees and Sasa separately using the ingrowth core method. Total FRP was higher in stands with substantial presence of Sasa (99–130 g m−2 yr−1) than in CP with scarce Sasa (69 g m−2 yr−1). Despite being occupied by Sasa alone, SA had high FRP, suggesting that the presence of Sasa regardless of trees is a key determinant of ecosystem FRP. Tree FRB increased with increasing tree aboveground biomass, tree density, or basal area at breast height, but Sasa FRB and total FRB decreased. Total FRP was also lower at higher values of these aboveground stand factors. In Sasa, specific root length was significantly higher, and root tissue density was significantly lower, than in trees, indicating the capacity of Sasa for explosive growth. Positive correlations between Sasa FRB or FRP and soil inorganic N or ammonium contents (i.e. N availability) were detected. We conclude that Sasa is important in determining FRB and FRP in this northern forest with understory vegetation.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Forest Research on 29 Jan 2023, available online: https://www.tandfonline.com/doi/full/10.1080/13416979.2023.2169981
PISSN	1610-7403
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1080/13416979.2023.2169981