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| 1 | Carbon and nitrogen dynamics in a Pinus densiflora forest with low and high stand densities显示文摘Aims Understanding carbon(C)and nitrogen(N)dynamics and their dependence on the stand density of an even-aged,mature forest provides knowledge that is important for forest management.This study investigated the differences in ecosystem total C and N storage and flux between a low-density stand(LD)and a high-density stand(HD)and examined the effects of stand density on aboveground net primary productivity(ANPP),total belowground C allocation(TBCA)and net ecosystem production(NEP)in a naturally regenerated,65-to 75-year-old Pinus densiflora S.et Z.forest.Methods LD(450 trees ha^(−1))and HD(842 trees ha^(−1))were established in an even-aged,mature P.densiflora forest in September 2006.The forest had been naturally regenerated following harvesting,and the stand density was naturally maintained without any artificial management such as thinning.The diameter at breast height(DBH≥5.0cm)of all live stems within the stands was measured yearly from 2007 to 2011.To compare C and N storage and fluxes in LD and HD,C and N pools in aboveground and belowground biomass,the forest floor,coarse woody debris(CWD)and soil;soil CO_(2) efflux(R_(S));autotrophic respiration(R_(A));litter production;and soil N availability were measured.Further,ANPP,TBCA and NEP were estimated from plot-based measurement data.Important Findings Ecosystem C(Mg C ha^(−1))and N(Mg N ha^(−1))storage was,respectively,173.0±7.3(mean±SE)and 4.69±0.30 for LD and 162±11.8 and 4.08±0.18 for HD.There were no significant differences in C and N storage in the ecosystem components,except for soils,between the two stands.In contrast,there were significant differences in aboveground ANPP and TBCA between the two stands(P<0.05).Litterfall,biomass increment and R_(S) were major C flux components with values of,respectively,3.89,3.74 and 9.07 Mg C ha^(−1) year^(−1) in LD and 3.15,2.94 and 7.06 Mg C ha^(−1) year^(−1) in HD.Biometric-based NEP(Mg C ha^(−1) year^(−1))was 4.18 in LD and 5.50 in HD.Although the even-aged,mature P.densiflora forest had similar C and N allocation patterns,it showed different C and N dynamics depending on stand density.The results of the current study will be useful for elucidating the effects of stand density on C and N storage and fluxes,which are important issues in managing natural mature forest ecosystems. | Nam Jin Noh Choonsig Kim Sang Won Bae Woo Kyun Lee Tae Kyung Yoon Hiroyuki Muraoka Yowhan Son | 2013 | Journal of Plant Ecology2013，6，5： | 14 |
| 2 | MiR-145 functions as a tumor suppressor by directly targeting histone deacetylase 2 in liver cancer显示文摘 | Ji Heon Noh Young Gyoon Chang Min Gyu Kim Kwang Hwa Jung Jeong Kyu Kim Hyun Jin Bae Jung Woo Eun Qingyu Shen Seung-Jin Kim So Hee Kwon Won Sang Park Jung Young Lee Suk Woo Nam | 2013 | Cancer Letters2013，，2： | 2 |
| 3 | 韩国赤松林龄序列的生物量及碳氮储量显示文摘调查了韩国6种不同林龄(10,27,30,32,44和71年生)赤松林(Pinus densiflora)的生物量、碳含量和氮含量.采用收割法采集30株个体作为样本,其中有12株挖掘了全部的根系,采集植物体地上、地下部分、凋落物(CWD)、地被物及矿质土壤样品(0-30cm)进行分析.结果显示,树木生物量最大的是林龄71年生的样地(202.8t/ha),最小的是林龄10年生的样地(18.4t/ha);林龄71年生样地的矿质土壤碳、氮储量均高于其他样地,这可能与该样地较高的土壤碳、氮密度有关.生态系统总碳、氮储量从林龄10年生的样地(18.8tC/ha和1.3tN/ha)到林龄71年生的样地(201.4tC/ha和8.5tN/ha)逐渐增高.生态系统总碳储量和树木碳储量都呈现出随着林龄S型增长的趋势,而凋落物、地被物和矿质土壤的氮含量则未显示出随林龄变化而显著变化的趋势.本结果对了解赤松林碳、氮储量的现状及预测未来的生长变化提供有效依据. | NOH Nam Jin SON Yowhan LEE Sue Kyoung SEO Kyung Won HEO Su Jin YI Myong-Jong PARK Pil Sun KIM Rae Hyun SON Yeong Mo LEE Kyeong Hak | 2010 | 中国科学:生命科学2010，40，7： | 1 |
| 4 | Genomic analysis and pathogenic characteristics of Type 2 porcine reproductive and respiratory syndrome virus nsp2 deletion strains isolated in Korea显示文摘 | Hwan-Won Choi Eeuri Nam Yoo Jin Lee Yun-Hee Noh Seung-Chul Lee In-Joong Yoon Hyun-Soo Kim Shien-Young Kang Young-Ki Choi Changhee Lee | 2014 | Veterinary Microbiology2014，，： | 1 |
| 5 | Nonlinear observer design by dynamic observer error linearization显示文摘 | Daejong Jo Noh Nam H Seo Jin H | 2004 | IEEE Transactions on Automatic Control2004，49，10： | 1 |
| 6 | Coarse woody debris mass and nutrients in forest ecosystems of Korea显示文摘 | Rae-Hyun Kim Yowhan Son Jong Hwan Lim Im Kyun Lee Kyung Won Seo Jin Woo Koo Nam Jin Noh Soung-Ryoul Ryu Sun Kee Hong Byung Sun Ihm | 2006 | Ecological Research2006，，6： | 1 |
| 7 | Effect of open-field experimental warming on the leaf phenology of oriental oak (Quercus variabilis) seedlings显示文摘Aims An open-field warming experiment enables us to test the effects of projected temperature increase on change in plant phenology with fewer confounding factors and to study phenological response to temperature ranges beyond natural variability.This study aims to(i)examine the effect of temperature increase on leaf unfold-ing and senescence of oriental oak(Quercus variabilis Blume)under experimental warming and(ii)measure temperature-related parameters used in estimating phenological response to tempera-ture elevation.Methods Using an open-field warming system with infrared heaters,we increased the air temperature by~3℃ in the warmed plots compared with that of the control plots consistently for 2 years.Leaf unfolding and senescence dates of Q.variabilis seedlings were recorded and temperature-related phenological parameters were analysed.Important Findings The timing of leaf unfolding was advanced by 3-8 days(1.1-3.0 days/℃)and the date of leaf senescence was delayed by 14-19 days(5.0-7.3 days/℃)under elevated air temperatures.However,the cumulative degree days(CDD)of leaf unfolding were not significantly changed by experimental warming,which suggest the applicability of a constant CDD value to estimate the change in spring leaf phe-nology under 3℃ warming.Consistent ranges of advancement and temperature sensitivity in spring phenology and delayed autumn phe-nology and proposed temperature parameters from this study might be applied to predict future phenological change. | Saerom Han Haegeun Chung Nam Jin Noh Sun Jeoung Lee Wooyong Jo Tae Kyung Yoon Koong Yi Chan-woo Park Suin Ko Yowhan Son | 2014 | Journal of Plant Ecology2014，7，6： | 0 |
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