Enhanced annual litterfall production due to spring solar radiation in cool-temperate mixed forests of northern Hokkaido, Japan

Aguilos, Maricar; Takagi, Kentaro; Takahashi, Hiroyuki; Hasegawa, Junko; Ashiya, Daitaro; Kotsuka, Chikara; Naniwa, Aiko; Sakai, Rei; Ito, Keiichi; Miyoshi, Chikako; Nomura, Mutsumi; Uemura, Shigeru; Sasa, Kaichiro

doi:10.2480/agrmet.68.4.2

Cited by 3 publications

(4 citation statements)

References 23 publications

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“…The litterfall peak patterns (i.e., spring and fall) observed in CS and SH b stands may be due to two factors, namely, (1) the influence of temperature on leaf phenology of the species, and (2) the disturbance effect of typhoons. First, it was reported that the enhanced annual litterfall production was positively related to temperature due to the advancement of leaf expansion and increased forest productivity during the spring season [50][51][52][53]. The litterfall peaks we observed are also consistent with the pattern reported for a subtropical evergreen forest in China [54], which was associated with physiological leaf senescence as cited in similar studies [55,56].…”

Section: Litterfall Production In Different Forestssupporting

confidence: 90%

Carbon and Nutrient Inputs by Litterfall in Evergreen and Deciduous Forests in Korea

Park

Rahman

Han

et al. 2020

Forests

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Knowledge about carbon and nutrient fluxes by litterfall is important for understanding nutrient cycling in geologically unique ecosystems. However, the determination of forest litterfall production patterns is difficult due to many biophysical factors influencing the process. In this study, we (1) quantified the litterfall production and carbon and nutrient fluxes in warm-temperate evergreen forest stands in Jeju Gotjawal and (2) compared these values to those of a typical cool-temperate deciduous forest stand by forest types and climate differences. Litterfall from evergreen broadleaved forests at Cheongsu (CS) and Seonheul (SHb), a mixed forest at Seonheul (SHm) in Jeju Gotjawal, and a deciduous broadleaved forest at Chungnam National University Forest (CNU) was collected for a full two years using litter traps. Samples were sorted into leaves, twigs, barks, seeds, and unidentified materials, and then weighed and measured for C, N, P, K, Ca, and Mg fluxes by litterfall. Results showed that the mean annual litterfall (846.3 g m−2, average of CS, SHb, and SHm) at Jeju Gotjawal was similar to that of CNU (885.5 g m−2), but varied by site in Jeju Gotjawal: CS (933.1 g m−2) was significantly higher than the average of SHb and SHm (802.9 g m−2). Seasonal patterns of litterfall production differed by forest types; evergreen broadleaved forests showed a bimodal peak in fall and spring while deciduous broadleaved forests showed a unimodal peak in fall. Jeju Gotjawal had significantly higher total macronutrient concentrations and contents (except for K) than CNU and they also varied by site in Jeju Gotjawal: CS had higher N, P, Ca, and Mg contents than SHb and SHm. We conclude that litterfall production and nutrient fluxes differed by forest stand as influenced by forest types and climate. Further, our findings are important for understanding carbon and nutrient dynamics in the geologically unique ecosystem of Jeju Gotjawal and other areas with similar characteristics.

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Section: Litterfall Production In Different Forestssupporting

confidence: 90%

Carbon and Nutrient Inputs by Litterfall in Evergreen and Deciduous Forests in Korea

Park

Rahman

Han

et al. 2020

Forests

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“…Our use of 20 × 20 m treatment area was, to our knowledge, the largest spatial scale utilized to date for advancing snowmelt treatment in an experiment like this. The lack of the significant decrease of water availability could be partly due to the humid climate in northern Hokkaido where water is unlikely to be a limiting resource for plants (Aguilos et al, 2012). Blankinship et al (2014) conducted a 4 × 4 m delayed‐snowmelt manipulation that induced an increase in water availability at the surface soil of a temperate forest in the Sierra Nevada Mountains of California, which experiences a Mediterranean‐type climate with water being a primary limiting resource for plants.…”

Section: Discussionmentioning

confidence: 99%

“…When we decided upon the scenario to mimic in the present study, we examined the data of the average spring (March-May) air temperature and the date of snowmelt from 1996 to 2014 in northern Hokkaido, which had partly been reported in Aguilos et al (2012) (Appendix S1: Figure S1). While the average date of snow disappearance during the monitoring period was DOY 111, that with extremely warm temperatures at the end of spring was DOY 96.…”

Section: Experimental Designmentioning

confidence: 99%

Early snowmelt by an extreme warming event affects understory more than overstory trees in Japanese temperate forests

et al. 2022

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The occurrence of extreme warm events and early snowmelt is predicted to increase in high‐latitude ecosystems, even during periods of time when there is no coincident reduction in total precipitation. However, because extreme events like these occur unpredictably, little is known about how advancing snowmelt by a single extreme warm event, without a reduction in precipitation amount, influences overstory trees and understory vegetation simultaneously in an ecosystem. We conducted a warming experiment (four 20 × 20 m plots) in temperate forests of Japan to determine the effects of earlier snowmelt on both understory dwarf bamboo plants and overstory birch trees. Our experimental treatment advanced snowmelt by about 10 days and increased soil temperatures that were associated with increased rates of soil nitrogen (N) mineralization and nitrification. Furthermore, these changes led to lower C:N ratios of leaves together with the greater growth of understory bamboo vegetation, with no changes in leaf C:N or growth rates of overstory birch trees. Together, our results demonstrate that advancing snowmelt by an extreme warm event in temperate forests is likely to affect N cycling and will benefit understory vegetation without a commensurate change in overstory vegetation, likely due to the increase in available soil N. These results also demonstrate that with the projected increase in the frequency of extreme warm events and advanced snowmelt, understory vegetation is likely to benefit more than overstory trees in Japanese temperate forests with heavy snow.

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“…归还到地表的所有有机物质的总称, 是连接陆地生态系统地下和地上生态过程的关键媒介 (Facelli & Pickett, 1991) (Janssens & Pilegaard, 2003;DeForest et al, 2009)。总的来说, 凋落物产量的时间动态由多种外部因素以及物种生理特征所决定。长期定位观测发现群落特征是影响凋落物年际动态的主要因素 (官丽莉等, 2004;Li et al, 2010;Aguilos et al, 2012)。降水量及温度是影响凋落物季节动态的主要因素 (Sanches et al, 2008;张新平等, 2008;武启骞等, 2017 图4 2008-2015年8个气候变量月值的主成分分析结果。每个点的横纵坐标为该变量在主成分轴上的荷载值, 百分数表示方差被该主成分轴所解释的部分。"prep"表示月降水量, "temp" "max temp" "min temp"分别表示月平均气温、月最高气温及月最低气温。 Fig. 4 Principal component analysis of the monthly values for eight meteorological variables from January 2008 to December 2015.…”

Section: 凋落物也称枯落物是指植物地上部分产生并unclassified

Litter dynamics of evergreen deciduous broad-leaved mixed forests and its influential factors in Shennongjia, China

Lü¹,

Chang-ming²,

Xu³

et al. 2018

Chinese Journal of Plant Ecology

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Aims Litter is an important component of terrestrial ecosystems. The dynamics of litter can reflect the stage of terrestrial ecosystems and the impact of environment on vegetation. Our objective was to explore the dynamics of litter production and standing crop in evergreen deciduous broad-leaved mixed forests and the underlying factors. Methods During 2009-2015, we observed the litter production and the standing crop of a typical vegetation at Shennongjia, Hubei Province and analyzed their dynamics and relationships with meteorological factors. Important findings 1) The results showed that the average annual litter production and standing crop were 5.94 t•hm-2 and 10.46 t•hm-2 , respectively. Additionally, there was no remarkable inter-annual changing trend between 2009 and 2014, nevertheless a significant lower value appeared in 2015 with much more days of late spring coldness. 2) The seasonal dynamics presented double peaks, in March to May and October separately. 3) The monthly litter production was positively correlated with the monthly average air temperature of the previous 1-4 months, but negatively correlated with that in the 8th, 9th and 10th months before the month. In addition, it was negatively associated with the monthly average relative humidity of the 6th, 7th and 10th months before the month. 4) The average seasonality index of litter production was 0.032, which was strongly positively correlated with the annual average air temperature. We concluded that the phenomenon of long-term late spring coldness will affect annual litter production and standing crop significantly. The monthly average air temperature and relative humidity had significant lag effect on the seasonal dynamics of litter production, and the annual average air temperature had positive influence on the seasonality index of litter production in the major forest types in north subtropics.

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Enhanced annual litterfall production due to spring solar radiation in cool-temperate mixed forests of northern Hokkaido, Japan

Cited by 3 publications

References 23 publications

Carbon and Nutrient Inputs by Litterfall in Evergreen and Deciduous Forests in Korea

Carbon and Nutrient Inputs by Litterfall in Evergreen and Deciduous Forests in Korea

Early snowmelt by an extreme warming event affects understory more than overstory trees in Japanese temperate forests

Litter dynamics of evergreen deciduous broad-leaved mixed forests and its influential factors in Shennongjia, China

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