|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Carbon density and distribution of six Chinese temperate forests显示文摘Quantifying forest carbon(C) storage and distribution is important for forest C cycling studies and terrestrial ecosystem modeling.Forest inventory and allometric approaches were used to measure C density and allocation in six representative temperate forests of similar stand age(42-59 years old) and growing under the same climate in northeastern China.The forests were an aspen-birch forest,a hardwood forest,a Korean pine plantation,a Dahurian larch plantation,a mixed deciduous forest,and a Mongolian oak forest.There were no significant differences in the C densities of ecosystem components(except for detritus) although the six forests had varying vegetation compositions and site conditions.However,the differences were significant when the C pools were normalized against stand basal area.The total ecosystem C density varied from 186.9 tC hm-2 to 349.2 tC hm-2 across the forests.The C densities of vegetation,detritus,and soil ranged from 86.3-122.7 tC hm-2,6.5-10.5 tC hm-2,and 93.7-220.1 tC hm-2,respectively,which accounted for 39.7% ± 7.1%(mean ± SD),3.3% ± 1.1%,and 57.0% ± 7.9% of the total C densities,respectively.The overstory C pool accounted for > 99% of the total vegetation C pool.The foliage biomass,small root(diameter < 5mm) biomass,root-shoot ratio,and small root to foliage biomass ratio varied from 2.08-4.72 tC hm-2,0.95-3.24 tC hm-2,22.0%-28.3%,and 34.5%-122.2%,respectively.The Korean pine plantation had the lowest foliage production efficiency(total biomass/foliage biomass:22.6 g g-1) among the six forests,while the Dahurian larch plantation had the highest small root production efficiency(total biomass/small root biomass:124.7 g g-1).The small root C density decreased with soil depth for all forests except for the Mongolian oak forest,in which the small roots tended to be vertically distributed downwards.The C density of coarse woody debris was significantly less in the two plantations than in the four naturally regenerated forests.The variability of C allocation patterns in a specific forest is jointly influenced by vegetation type,management history,and local water and nutrient availability.The study provides important data for developing and validating C cycling models for temperate forests. | ZHANG QuanZhi & WANG ChuanKuan* College of Forestry,Northeast Forestry University,Harbin 150040,China | 2010 | Science China(Life Sciences)2010，53，7： | 36 |
| 2 | Nitrogen Deposition and Its Spatial Pattern in Main Forest Ecosystems along North-South Transect of Eastern China显示文摘A continuous three-year observation(from May 2008 to April 2011)was conducted to characterize the spatial variation of dissolved inorganic nitrogen(DIN)deposition at eight main forest ecosystems along the north-south transect of eastern China(NSTEC).The results show that both throughfall DIN deposition and bulk DIN deposition increase from north to south along the NSTEC.Throughfall DIN deposition varies greatly from 2.7 kg N/(ha·yr)to 33.0 kg N/(ha·yr),with an average of 10.6 kg N/(ha·yr),and bulk DIN deposition ranges from 4.1 kg N/(ha·yr)to 25.4 kg N/(ha·yr),with an average of 9.8 kg N/(ha·yr).NH4+-N is the dominant form of DIN deposition at most sampling sites.Additionally,the spatial variation of DIN deposition is controlled mainly by precipitation.Moreover,in the northern part of the NSTEC,bulk DIN deposition is 17%higher than throughfall DIN deposition,whereas the trend is opposite in the southern part of the NSTEC.The results demonstrate that DIN deposition would likely threaten the forest ecosystems along the NSTEC,compared with the critical loads(CL)of N deposition,and DIN deposition in this region is mostly controlled by agricultural activities rather than industrial activities or transportation. | ZHAN Xiaoyun YU Guirui HE Nianpeng FANG Huajun JIA Bingrui ZHOU Mei WANG Chuankuan ZHANG Junhui ZHAO Guangdong WANG Silong LIU Yunfen YAN Junhua | 2014 | Chinese Geographical Science2014，24，2： | 10 |
| 3 | Spatio-temporal patterns of forest carbon dioxide exchange based on global eddy covariance measurements显示文摘Spatio-temporal patterns and driving mechanisms of forest carbon dioxide (CO2) exchange are the key issues on terrestrial ecosystem carbon cycles, which are the basis for developing and validating ecosystem carbon cycle models, assessing and predicting the role of forests in global carbon balance. Eddy covariance (EC) technique, an important method for measuring energy and material exchanges between terrestrial ecosystems and the atmosphere, has made a great contribution to understanding CO2 exchanges in the biosphere during the past decade. Here, we synthesized published EC flux measurements at various forest sites in the global network of eddy flux tower sites (FLUXNET) and regional flux networks. Our objective was to explore spatio-temporal patterns and driving factors on forest carbon fluxes, i.e. net ecosystem productivity (NEP), gross primary productivity (GPP) and total ecosystem respiration (TER). Globally, forest NEP exhibited a significant latitudinal pattern jointly controlled by GPP and TER. The NEP decreased in an order of warm temperate forest > cold temperate and tropical rain forests > boreal and subalpine forests. Mean annual temperature (MAT) made a greater contribution to forest carbon fluxes than sum of annual precipitation (SAP). As MAT increased, the GPP increased linearly, whereas the TER increased exponentially, resulting in the NEP decreasing beyond an MAT threshold of 20°C. The GPP, TER and NEP varied substantially when the SAP was less than 1500 mm, but tended to increase with increasing SAP. Temporal dynamics in forest carbon fluxes and determinants depended upon time scales. NEP showed a significant interannual variability mainly driven by climate fluctuations and different responses of the GPP and TER to environmental forcing. In a longer term, forest carbon fluxes had a significant age effect. The ecosystem was a net carbon source right after clearcutting, gradually switched to a net carbon sink when the relative stand age (i.e. ratio of actual stand age to the stand rotation age) approached 0.3, and maximized carbon sequestration capacity at premature or mature stand stages. This temporal pattern of NEP was correlated with stand leaf area index and associated GPP. This study highlights the significance of spatio-temporal dynamics in the CO2 exchange in forest carbon cycling studies. It is also suggested that in addition to forest biomes, interannual variations and stand age effects of forest carbon fluxes should be considered in the global carbon balance. | XingChang Wang ChuanKuan Wang GuiRui Yu | 2008 | Science China Earth Sciences2008，51，8： | 8 |
| 4 | Variations in fine root dynamics and turnover rates in five forest types in northeastern China显示文摘Quantifying fi ne root(≤ 2.0 mm in diameter) distribution and turnover is essential for accurately estimating forest carbon budgets. However, fi ne root dynamics are poorly understood, possibly because of their inaccessibility. This study quantifi es fi ne root distribution and turnover rates for fi ve representative Chinese temperate forests types. Fine root number, diameter, biomass, necromass, production, mortality, and turnover rates were measured using a minirhizotron over a 12-month period. More than 90% of the fi ne roots were < 0.5 mm in diameter, with thin fi ne roots at shallow layers, and thicker ones in deeper soil layers. The fi ne root dynamics were signifi cantly diff erent among the forest types. Coniferous plantations had fewer fi ne roots, less biomass, necromass, production and mortality but greater average diameters than fi ne roots of broadleaved forests. All traits, except for diameter, decreased along the soil profi le. Fine root numbers and production exhibited a unimodal seasonal pattern with peaks occurring in summer, whereas biomass, necromass and mortality progressivelyincreased over the growing season. The turnover rates of roots < 0.5 mm varied from 0.4 to 1.0 a-1 for the fi ve forest types, 0.5–1.0 a-1 for the soil layers and 0.2–1.1 a-1 for the seasons, with the largest turnover rate at the 0–10 cm depth in summer. The patterns of fi ne root numbers, biomass, necromass, production, mortality, and turnover rates varied with forest types, soil depths, growing season and diameter classes. This study highlights the importance of forest types and diameters in quantifying fi ne root turnover rates. | Nan Wang Chuankuan Wang Xiankui Quan | 2020 | Journal of Forestry Research2020，31，3： | 3 |
| 5 | The influence of fire on carbon distribution and net primary production of boreal Larix grnelinii forests in north-eastern China显示文摘 | Wang Chuankuan Gower S T Wang Yihong | 2001 | Global Change Biology2001，7，6： | 1 |
| 6 | Biomass allometric equations for 10 co-occurring tree species in Chinese temperate forests显示文摘 | Chuankuan Wang | 2005 | Forest Ecology and Management2005，，1： | 1 |
| 7 | Carbon concentration variability of 10 Chinese temperate tree spe- cies 显示文摘 | Zhang Quanzhi Wang Chuankuan Wang Xingchang | 2009 | Forest Ecology and Management2009，258，5： | 1 |
| 8 | Effects of nutrient and paper mill biosolids amendments on the growth and nutrient status of hardwood forests显示文摘 | Feldkirchner Drew C Chuankuan Wang Gower Stich T | 2003 | Forest Ecology and Managemen2003，177，： | 1 |
| 9 | Biomass allometric equations for 10 co-occurring tree species in Chinese temperate forests显示文摘 | Wang Chuankuan | 2006 | Forest Ecology and Management2006，222，： | 1 |
| 10 | Different hydraulic strategies under drought stress between Fraxinus mandshurica and Larix gmelinii seedlings显示文摘Persistent and severe drought induced by global climate change causes tree mortality mainly due to the hydraulic imbalance of conduit systems,but the magnitude of injury may be species dependent.A water-exclusion experiment was carried out on seedlings of two tree species with distinct characteristics,i.e.,Fraxinus mandshurica and Larix gmelinii to examine hydraulic responses of leaf,stem,and root to drought stress.The two species displayed different hydraulic strategies and related traits in response to drought stress.L.gmelinii reduced its leaf hydraulic conductance by quick stomatal closure and a slow decline in leaf water potential,with a more isohydric stomatal regulation to maintain its water status.In contrast,F.mandshurica was more anisohydric with a negative stomatal safety margin,exhibiting strong resistance to embolism in stem and leafstem segmentation of hydraulic vulnerability to preserve the hydraulic integrity of stem.These differences in hydraulic behaviors and traits between the two species in response to drought stress provide a potential mechanism for their coexistence in temperate forests,including which in the forest modeling would improve our prediction of tree growth and distribution under future climate change. | Dandan Luo Chuankuan Wang Ying Jin Zhimin Li Zhaoguo Wang | 2023 | Journal of Forestry Research2023，34，1： | 1 |
| 11 | Carbon concentration variability of 10 Chinese temperate tree species显示文摘 | Quanzhi Zhang Chuankuan Wang Xingchang Wang Xiankui Quan | 2009 | Forest Ecology and Management2009，，5： | 1 |
| 12 | 颜色和物候表明46种温带落叶木本植物衰老叶片的养分变异显示文摘不同共生植物的叶片养分含量差异显著,反映了不同的叶片养分利用策略。然而,衰老叶片养分的种间变异及其驱动因素尚不清楚。本研究旨在探讨衰老叶片养分的种间变异及其驱动因素。我们在中国东北的帽儿山森林生态系统研究站测定了46种共存温带落叶木本植物新鲜落叶的碳、氮、磷浓度。采用随机森林模型量化10个生物因素(菌根类型、固氮类型、生长形态、耐阴性、叶片质地、变色程度、变色类型、叶片变色峰期、落叶峰期和落叶末期)的相对重要性。研究结果表明,落叶氮浓度种间变化为4倍,磷浓度变化达9倍。较高的氮和磷平均浓度(15.38和1.24 mg·g^(−1))表明该森林氮和磷限制较弱。功能群仅对特定养分及其比值有显著影响。磷浓度、氮磷比与外生菌根树种的落叶高峰日和落叶结束日呈负相关。颜色鲜艳的叶片(红色>棕色>黄色>黄绿色>绿色)倾向于比绿色叶片氮和磷浓度更低而碳氮比和碳磷比较高。随机森林模型表明,秋季叶变色和落叶物候贡献了80%的种间变异解释量。这些结果增加了我们对温带森林木本植物营养策略之衰老叶片养分变异性的理解。 | Xingchang Wang Qi Wang Yue Chen Rui Zhao Jiahui Zhang Xiankui Quan Fan Liu Chuankuan Wang | 2022 | Journal of Plant Ecology2022，15，4： | 1 |
| 13 | Simulating net primary production and soil-surface CO2 flux of temperate forests in northeastern China显示文摘 | LIU Xi GUO Qingxi WANG Chuankuan | 2011 | Scandinavian Journal of Forest Research2011，26，1： | 1 |
| 14 | Con- tribution of root respiration to soil surface CO2 flux in a boreal black spruce chronosequence显示文摘 | Bond-lamberty B Wang Chuankuan Gower S T | 2004 | Tree Physiolo- gy2004，24，12： | 1 |
| 15 | Effects of nutrient and paper mill biosolids amendments on the growth and nutrient status of hardwood forests显示文摘 | Feldkirchner Drew C Chuankuan Wang Gower Stich T | 2003 | Forest Ecology and Managemen2003，177，： | 1 |
| 16 | Biomass allometric equations for 10 co-occurring tree species in Chinese temperate forests 显示文摘 | Chuankuan Wang | 2006 | Forest Ecology and Management2006，222，： | 1 |
| 17 | Impacts of fire severity and post-fire reforestation on carbon pools in boreal larch forests in Northeast China显示文摘Aims Boreal larch(Larix gmelinii)forests in Northeast China have been widely disturbed since the 1987 conflagration;however,its long-term effects on the forest carbon(C)cycling have not been explored.The objective of this study thus was to quantify the effects of fire severity and post-fire reforestation on C pools and the changes of these forests.Methods Sixteen permanent plots have been set in two types of larch stands(L.gmelinii-grass,LG;and L.gmelinii-Rhododendron dahurica,LR)with three levels of fire severity(unburned,low-severity and high-severity but replanted),at 1987 burned sites in Daxing’anling,northeastern China,to repeatedly measure ecosystem C pools in 1998 and 2014.C components were partitioned into vegetation(foliage,branch,stem and roots),soil and detritus(standing and fallen woody debris and litter).The fire effects on post-fire C dynamics were examined by comparing the differences of C pools and changes between the two field investigations caused by fire severity.Important Findings During the study period,unburned mature stands were C sinks(105 g C m^(−2) year^(−1) for LG,and 190 g C m^(−2) year^(−1) for LR),whereas the low-severity stands were C-neutral(−4 and 15 g C m^(−2) year^(−1) for LG and LR,respectively).The high-severity burned but reforested stands were C sinks,among which,however,magnitudes(88 and 16 g C m^(−2) year^(−1) for LG and LR,respectively)were smaller than those of the two unburned stands.Detritus C pools decreased significantly(with a loss ranging from 26 to 38 g C m^(−2) year^(−1))in the burned stands during recent restoration.Soil organic C pools increased slightly in the unmanaged stands(unburned and lowseverity,with accumulation rates ranging from 4 to 35 g C m^(−2) year^(−1)),but decreased for the high-severity replanted stands(loss rates of 28 and 36 g C m^(−2) year^(−1) for LG and LR,respectively).These results indicate that fire severity has a dynamic post-fire effect on both C pools and distributions of the boreal larch forests,and that effective reforestation practice accelerates forest C sequestration. | Xueyang Hu Jianxiao Zhu Chuankuan Wang Tianli Zheng Qiqian Wu Hui Yao Jingyun Fang | 2016 | Journal of Plant Ecology2016，9，1： | 1 |
| 18 | Nitrogen dynamics of a boreal black spruce wildfire chronosequence显示文摘 | Ben Bond-Lamberty Stith T. Gower Chuankuan Wang Pascal Cyr Hugo Veldhuis | 2006 | Biogeochemistry2006，，1： | 1 |
| 19 | Afforestation increases microbial diversity in low-carbon soils显示文摘Afforestation has an important role in biodiversity conservation and ecosystem function improvement.A meta-analysis was carried out in China,which has the largest plantation area globally,to quantify the effects of plantings on soil microbial diversity.The results showed that the overall effect of afforestation on soil microbial diversity was positive across the country.Random forest algorithm suggested that soil carbon was the most important factor regulating microbial diversity and the positive response was only found with new plantings on low-carbon bare lands but not on high-carbon farmlands and grasslands.In addition,afforestation with broadleaved species increased microbial diversity,whereas planting with conifers had no effect on microbial diversity.This study clarified the effects of plantings on soil microbial diversity,which has an important implication for establishing appropriate policies and practices to improve the multiple functionalities(e.g.,biodiversity conservation and climate change mitigation)during plantation establishment. | Xuesen Pang Chuankuan Wang Chengjie Ren Zhenghu Zhou | 2024 | Journal of Forestry Research2024，35，2： | 0 |
| 20 | 兴安落叶松和水曲柳叶片水力性状对长期氮添加的响应显示文摘大气氮沉降影响树木水力结构,进而影响树木的生长和生存。然而,目前关于叶片水力性状对氮沉降的响应尚不明确,而且该响应可能与物种或植物功能型有关。本研究以中国东北地区水曲柳(Fraxinus mandshurica,阔叶被子植物)和兴安落叶松(Larix gmelinii,针叶裸子植物)人工林为研究对象,利用长达16年的施氮(10 g N m^(−2)yr^(−1))试验研究了氮添加对两种树种叶片水力性状的影响。用自然干燥法测定了叶片压力-容积曲线,用复水动力学法量化了叶片最大水力导度(K_(leaf_max))和抗栓塞阻力(P50leaf)。研究结果表明,与水曲柳相比,兴安落叶松具有较高的K_(leaf_max)和较强的干旱容忍性(即较低的质壁分离点的相对含水量(RWC_(tlp))和弹性模量(ε),较负的P50leaf)。此外,氮添加增加了水曲柳的叶膨压损失点水势(πtlp)、叶饱和含水量时的渗透势(π0)和叶水容(Cleaf_mass),但对兴安落叶松的这些性状影响不显著,表明水曲柳对氮添加更敏感。氮添加增加了水曲柳和兴安落叶松的K_(leaf_max)和P50leaf。水曲柳的πtlp和π0均与叶密度(LD)正相关,而Cleaf_mass与LD负相关。兴安落叶松的K_(leaf_max)与LD正相关,P50leaf与LD负相关。两个树种的K_(leaf_max)与P50leaf均呈负相关关系。我们的研究表明,长期氮添加降低了这两个重要造林树种的叶片干旱容忍性,这一发现加深了我们对氮沉降背景下树木水力表现的理解。 | Ying Jin Chuankuan Wang Zhenghu Zhou Jiacun Gu | 2021 | Journal of Plant Ecology2021，14，6： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员