Growth and substrate quality of fine root and soil nitrogen availability in a young Betula ermanii forest of northern Japan: Effects of the removal of understory dwarf bamboo (Sasa kurilensis)

Tripathi, S. K.; Sumida, Akihiro; Shibata, Hideaki; Uemura, Shigeru; Ono, Kiyomi; Hara, Toshihiko

doi:10.1016/j.foreco.2005.03.030

Cited by 43 publications

(45 citation statements)

References 43 publications

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“…4 showed that leaf inclination was consistently greater in the SR plot than in the SI plot, even in the lower canopy. We did not determine why this occurs, but it may reflect a difference in water and/or nutrient status between the two plots (Takahashi et al 2002, Tripathi et al 2005, 2006a, 2006b, Ishii et al 2008. As suggested by Pearcy et al (2005), leaf inclination would be related to the mode of radiation capture for photosynthesis and leaf transpiration.…”

Section: Importance Of Leaf Inclinationmentioning

confidence: 97%

“…The two plots, within the same continuous stand of B. ermanii, are referred to as SI (Sasa-intact) and SR (Sasa-removed), respectively. These plots were established to study interactions between B. ermanii trees and S. kurilensis undergrowth (Takahashi et al 2002, Tripathi et al 2005, 2006a, 2006b, Ishii et al 2008). As our focus was on the foliage profile of B. ermanii trees, the S. kurilensis leaves were excluded from measurement.…”

Section: Study Sitesmentioning

confidence: 99%

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Ground-based estimation of leaf area index and vertical distribution of leaf area density in a Betula ermanii forest

Sumida¹,

Nakai²,

Yamada³

et al. 2009

Silva Fenn.

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We developed a ground-based method for estimating leaf area index (LAI) and vertical distribution of leaf area density (LAD) for two Betula ermanii plots, combining an allometric method for tree leaf area with the MacArthur-Horn (MH) method using a portable laser rangefinder, including a correction for changes in leaf inclination angle along the vertical gradient measured with a portable digital protractor from a canopy access tower in each plot. Vertical distribution of projected leaf area density obtained by the MH method (LAD MH ) was transformed to relative distribution for allotting fixed LAI to different heights. Hence, we first developed an allometric method for estimating tree leaf area for LAI determination. Trunk cross-sectional area at branching height (AB) was accurately estimated (r 2 = 0.97) from ground-based measurements of tree dimensions. We used this method to apply pipe model allometry between tree leaf area and AB, and estimated LAI (4.56 and 4.57 m 2 m -2 ). We then examined how leaf inclination angle affected estimation of the vertical distribution of actual LAD. Leaf inclination angle measurements revealed that actual LAD in the upper canopy was 1.5-1.8-times higher than LAD MH , because of steep leaf inclination, while the correction factor was 1.15-1.25 in the lower canopy. Due to the difference among heights, vertical distribution of LAD estimated with correction for vertical change in leaf inclination was more skewed to the upper canopy than that without correction. We also showed that error in LAD distribution can result if horizontal canopy heterogeneity is neglected when applying the MH method.

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Section: Importance Of Leaf Inclinationmentioning

confidence: 97%

Section: Study Sitesmentioning

confidence: 99%

Ground-based estimation of leaf area index and vertical distribution of leaf area density in a Betula ermanii forest

Sumida¹,

Nakai²,

Yamada³

et al. 2009

Silva Fenn.

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“…Previous experimental studies have found that removal of understory plants led to significant increase in soil N content [49,50] and soil water availability [12,51], and consequently, resulted in increased growth rate of the overstory trees [6,51]. The present study provided insight to explain the functional mechanisms underlying the positive effects of understory-removal on overstory growth.…”

Section: Discussionmentioning

confidence: 54%

“…For example, dense understory vegetation can significantly decrease the soil temperature, net N mineralization, net nitrification rates, and soil water availability [12]. Removal experiments showed that understory removal can lead to significant increases in soil N [49,50] and soil water availability [12,51], and consequently, result in increased growth rate of the overstory trees [6,51]. The higher sensitivity of N and NSC in dry season and their insensitivity in the wet season (Figures 1-3) suggest that the most important effects of understories occur in regions with stressful growth conditions such as dry areas.…”

Section: Dry Season Vs Wet Seasonmentioning

confidence: 99%

Short-Term vs. Long-Term Effects of Understory Removal on Nitrogen and Mobile Carbohydrates in Overstory Trees

Cai

Bao

et al. 2016

Forests

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Understory management in forest ecosystems has been applied to improve the wood production for hundreds of years worldwide. The carbon-physiological mechanisms underlying these positive effects of understory management on the growth of overstory trees have received less attention. We studied the non-structural carbohydrate (NSC) and total nitrogen (N) concentrations in tissues (needles, stem sapwood, and fine roots) of three tree species (two evergreen and one deciduous species) grown in the presence or absence (understory cut) of understory shrubs in plantations in southwestern China, to test whether understories affect the carbon and nitrogen status in the overstory trees. The concentrations of N, NSC (= soluble sugars + starch) in overstory trees varied significantly with understory treatments during the dry season rather than the wet season. Trees grown without understory shrubs had higher levels of N and NSC compared to trees grown with understories. The present study provides insight to explain the functional mechanisms for understory effects on growth of overstory trees, and indicates that the nitrogen and carbon status in overstory trees may be more strongly negatively affected by understory in stressful conditions rather than in optimal growth conditions. Moreover, the present study provides ecophysiology-based knowledge for dealing with understory vegetation management in forest ecosystems.

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“…Bamboos, for instance, greatly inhibit tree seedlings and saplings in many forests in Japan (Nakashizuka, 1989;Yamamoto, 1995), China (Taylor et al, 2006), Chile (Veblen, 1989), the United States (Harmon & Franklin, 1989), etc. Because of their rapid clonal growth and high degree of dominance (Nakashizuka & Numata, 1982a, b;Veblen, 1982;Lusk, 2001;Wang et al, 2006), bamboos largely reduce the underneath light availability, as well as the nutrients and water in soil (Rao & Ramakrishnan, 1989;Singh & Singh, 1999;Beckage & Clark, 2003;Takahashi et al, 2003;Embaye et al, 2005;Tripathi et al, 2005;Montti et al, 2011), and therefore, diminish the seedling abundance of the surrounding trees (Nakashizuka, 1988;Beckage et al, 2000;Caccia et al, 2009;Larpkern et al, 2010). Although much relevant research has been done, it will be interesting to add the influence of gap characteristics into the relationship between bamboos and tree regeneration.…”

Section: Field Measurements and Data Analysesmentioning

confidence: 99%

Effects of gap size, gap age, and bamboo Fargesia denudata on Abies faxoniana recruitment in South-western China

et al. 2015

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Aim of study: to study the effects of gap size, gap age and bamboo Fargesia denudata on natural regeneration of Abies faxoniana, both of which are the ubiquitous dominants in our research area.Area of study: subalpine coniferous forests in Wanglang Natural Reserve in Southwestern China. Material and Methods: 10 transect belts were randomly established, and a total of 97 gaps were recorded and used.Main results: (1) the number of bamboos with coverage of <17% significantly increased with increases of gap size and age, but the latter had little influence on the numbers of F. denudata with coverage of >17%. (2) F. denudata strongly inhibited A. faxoniana seedlings and saplings in small, young and old gaps, where the amount of A. faxoniana recruitment was relatively abundant, than in other types of gap. (3) The numbers of A. faxoniana seedlings in A-gaps, significantly decreased with the increases in gap size. However, in gaps where F. denudate was also present, A. faxoniana seedlings and saplings were insensitive to gap size or age. Research highlights: thick F. denudata would not be influenced by gap size or age. Because of the low occurrences of A. faxoniana seedlings and saplings, the negative effect of gap size, gap age and F. denudata on A. faxoniana recruitment was unclear

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Growth and substrate quality of fine root and soil nitrogen availability in a young Betula ermanii forest of northern Japan: Effects of the removal of understory dwarf bamboo (Sasa kurilensis)

Cited by 43 publications

References 43 publications

Ground-based estimation of leaf area index and vertical distribution of leaf area density in a Betula ermanii forest

Ground-based estimation of leaf area index and vertical distribution of leaf area density in a Betula ermanii forest

Short-Term vs. Long-Term Effects of Understory Removal on Nitrogen and Mobile Carbohydrates in Overstory Trees

Effects of gap size, gap age, and bamboo Fargesia denudata on Abies faxoniana recruitment in South-western China

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