Allometric equations for integrating remote sensing imagery into forest monitoring programmes
作者:
Jucker, Tommaso* ;Caspersen, John;Chave, Jerome;Antin, Cecile;Barbier, Nicolas;...
期刊:
Global Change Biology ,2017年23(1):177-190 ISSN:1354-1013
通讯作者:
Jucker, Tommaso
作者机构:
[Coomes, David A.; Jucker, Tommaso; Wedeux, Beatrice M. M.] Univ Cambridge, Dept Plant Sci, Forest Ecol & Conservat Grp, Cambridge, England.;[Caspersen, John] Univ Toronto, Fac Forestry, 33 Willcocks St, Toronto, ON M5S 3B3, Canada.;[Caspersen, John; Zimmermann, Niklaus E.; Waldner, Peter; Haeni, Matthias] Swiss Fed Res Inst WSL, Zurcherstr 111, CH-8903 Birmensdorf, Switzerland.;[Chave, Jerome] Univ Toulouse 3, Lab Evolut & Diversite Biol, UMR5174, CNRS, Batiment 4R1,118 Route Narbonne, F-31062 Toulouse, France.;[Antin, Cecile; Barbier, Nicolas; Momo, Stephane; Ploton, Pierre] UMR AMAP, Inst Rech Dev, Montpellier, France.
通讯机构:
[Jucker, Tommaso] U;Univ Cambridge, Dept Plant Sci, Forest Ecol & Conservat Grp, Cambridge, England.
关键词:
aboveground biomass;airborne laser scanning;carbon mapping;crown architecture;height–diameter allometry;stem diameter distributions
摘要:
Remote sensing is revolutionizing the way we study forests, and recent technological advances mean we are now able – for the first time – to identify and measure the crown dimensions of individual trees from airborne imagery. Yet to make full use of these data for quantifying forest carbon stocks and dynamics, a new generation of allometric tools which have tree height and crown size at their centre are needed. Here, we compile a global database of 108753 trees for which stem diameter, height and crown diameter have all been measured, including 2395 trees harvested to measure aboveground biomass. Using this database, we develop general allometric models for estimating both the diameter and aboveground biomass of trees from attributes which can be remotely sensed – specifically height and crown diameter. We show that tree height and crown diameter jointly quantify the aboveground biomass of individual trees and find that a single equation predicts stem diameter from these two variables across the world's forests. These new allometric models provide an intuitive way of integrating remote sensing imagery into large-scale forest monitoring programmes and will be of key importance for parameterizing the next generation of dynamic vegetation models. © 2016 The Authors. Global Change Biology Published by John Wiley & Sons Ltd.
语种:
英文
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中亚热带4种森林土壤碳、氮、磷化学计量特征
作者:
彭晓;方晰;喻林华;项文化;黄志宏
期刊:
中南林业科技大学学报 ,2016年36(11):65-72 ISSN:1673-923X
作者机构:
中南林业科技大学生命科学与技术学院,湖南长沙,410004;[方晰; 项文化; 黄志宏] 中南林业科技大学生命科学与技术学院,湖南长沙410004;[方晰; 项文化; 黄志宏] 南方林业生态应用技术国家工程实验室,湖南长沙410004;[彭晓; 喻林华] 中南林业科技大学
关键词:
中亚热带森林;土壤养分;生态化学计量比;相关性分析
摘要:
以湘中丘陵区杉木人工林(CL)、马尾松一石栎针阔混交林(PM)、南酸枣落叶阔叶林(CA)、石栎—青冈常绿阔叶林(LG)为对象,研究了中亚热带森林土壤有机碳(SOC)、全氮(TN)、全磷(TP)含量及其生态化学计量特征。结果表明:同一土层SOC、TN、TP含量随着森林树种增加而增加,LG、CA 0 ~ 30 cm土层SOC平均含量显著高于CL,但与PM差异不显著,CA各土壤层TN平均含量均显著高于CL、PM,但与LG差异不显著,CA各土壤层TP平均含量显著高于CL、PM、LG; 4种森林土壤SOC、TN含量随土壤深度增加而下降,呈“倒金字塔”的分布模式,但TP含量随土壤深度变化不明显,呈“圆柱体”的分布模式。LG各土壤层C:N、C:P平均比值最高,其次是PM,CA、CL最低,但4种森林同一土层N: P平均比值差异不显著,4种森林0 ~ 30 cm土层的C: N: P平均比值均明显高于我国土壤C: N: P比值的平均值(60: 5: 1),C: N、C: P、N: P比值均随土壤深度增加而下降,不同森林之间的差异也随土壤深度增加而减弱。土壤SOC、TN、TP相互之间的耦合关系显著,C: N、C: P比值主要受土壤SOC含量的影响,N: P比主要受到土壤SOC、TN含量的影响,土壤C: P比对土壤C: N、N: P比值影响显著。
语种:
中文
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Climate change and consequences on the water cycle in the humid Xiangjiang River Basin, China
作者:
Wu, Yiping;Liu, Shuguang* ;Yan, Wende* ;Xia, Jiangzhou;Xiang, Wenhua;...
期刊:
Stochastic Environmental Research and Risk Assessment ,2016年30(1):225-235 ISSN:1436-3240
通讯作者:
Liu, Shuguang;Yan, Wende
作者机构:
[Liu, Shuguang; Liu, SG; Yan, Wende; Wu, Yiping] Cent South Univ Forestry & Technol, Natl Engn Lab Appl Technol Forestry & Ecol South, Changsha 410004, Hunan, Peoples R China.;[Yuan, Wenping; Xia, Jiangzhou] Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China.;[Xiang, Wenhua] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;[Wang, Kelin; Luo, Qiao; Fu, Wei] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China.
通讯机构:
[Liu, SG; Yan, WD] C;Cent South Univ Forestry & Technol, Natl Engn Lab Appl Technol Forestry & Ecol South, Changsha 410004, Hunan, Peoples R China.
关键词:
Climate change;Hydrological cycle;Soil moisture;SWAT;Trend analysis
摘要:
Anthropogenic activities have altered the climate and led to changes in the water cycle. Understanding the climate change and hydrological responses is critical to derive adaptive strategies for sustainable water resources management. In this study, we diagnosed the trends of primary climate elements and hydrological components during the past half century (1960–2009) for the humid Xiangjiang River Basin in central-south China at multiple temporal and spatial scales. The air temperature trend demonstrated an overall warming climate but with a quicker pace in recent years;however, the wind speed reduced significantly in the early period, and this downtrend had largely disappeared after the mid-1990s. Under such a shifting climate, the hydrological responses were not monotonic during the past 50 years: the evapotranspiration behaved in a decreasing trend in the early 35 years (1960–1994), followed by an uptrend in the later period (1995–2009). The stepwise analysis of soil water content and baseflow demonstrated a wetting trend followed by a drying one but with a steeper slope, indicating an accelerated drying trend which may cause a concern in stream water availability especially in the dry season. Spatial trend analysis showed that some areas experienced a downtrend (drying) in the dry season, but most areas had an uptrend (wetting) in the wet season for the whole study period. Overall, the analyses of temporal and spatial changes are useful for decision makers to deal with the continuing changes in climate and hydrology. This study also highlighted the necessity of climate change studies at multiple temporal and spatial scales. ©2015, Springer-Verlag Berlin Heidelberg.
语种:
英文
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火烧对洞庭湖湿地荻(Miscanthus sacchariflorus)和苔草(Carex brevicuspis)群落土壤性质的影响
作者:
李亚芳;陈心胜;项文化;谢永宏
期刊:
湖泊科学 ,2016年28(2):334-339 ISSN:1003-5427
通讯作者:
Xie, Yonghong(yonghongxie@163.com)
作者机构:
[李亚芳] 中国科学院亚热带农业生态研究所,洞庭湖湿地生态系统观测研究站,长沙410125;[李亚芳] 中南林业科技大学生命科学与技术学院,长沙410004;中南林业科技大学生命科学与技术学院,长沙,410004;[谢永宏; 陈心胜] 中国科学院亚热带农业生态研究所;[项文化] 中南林业科技大学
通讯机构:
Dongting Lake Station for Wetland Ecosystem Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
关键词:
火烧;湿地植物;土壤营养;干扰;荻;苔草;洞庭湖
摘要:
火烧作为调控因子,对植物群落结构和生态系统功能具有重要影响,但在湖泊湿地中研究较少.通过野外调查取样与实验室分析,探讨火烧对洞庭湖湿地主要群落类型--荻(Miscanthus sacchariflorus)和苔草(Carex brevicuspis)土壤化学性质的影响.结果表明:火烧后,苔草群落土壤硝态氮含量显著减少64.6%,有机质含量增加26.3%;而荻群落土壤与之相反,硝态氮含量增加186.9%,有机质含量减少22.9%.火烧后,苔草群落的全氮、铵态氮、全碳和全磷含量均显著增加,分别增加了75.4%、36.3%、102.7%和76.9%,而荻群落土壤与对照组间无显著差异.总体上,火烧对荻群落土壤养分影响不大,可作为芦苇场的一种管理方式,但火烧促进苔草群落土壤养分释放,有助于苔草群落提前萌芽和生长,并引起牲畜牧食增加.
语种:
中文
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中亚热带土地利用方式对土壤易氧化有机碳及碳库管理指数的影响
作者:
张仕吉;项文化;孙伟军;方晰
期刊:
生态环境学报 ,2016年25(6):911-919 ISSN:1674-5906
作者机构:
中南林业科技大学材料科学与工程学院, 湖南, 长沙, 410004;中南林业科技大学生命科学与技术学院, 南方林业生态应用技术国家工程实验室, 湖南, 长沙, 410004;中南林业科技大学生命科学与技术学院, 湖南, 长沙, 410004;[张仕吉] 中南林业科技大学材料科学与工程学院, 湖南, 长沙, 410004;[项文化; 方晰] 中南林业科技大学生命科学与技术学院, 南方林业生态应用技术国家工程实验室, 湖南, 长沙, 410004
关键词:
湘中丘陵区;土地利用方式;易氧化有机碳;次生林;碳库管理指数
摘要:
为了解土地利用方式对中亚热带土壤易氧化有机碳(ROC)及碳库管理指数(CMI)的影响,采用KMnO_4氧化法,对湘中丘陵区6种土地利用类型:石栎(Lithocarpus glaber)-青冈(Cyclobalanopsis glauca)次生林、杉木(Cunninghamia lanceolata)人工林、毛竹(Phyllostachys edulis)林、苗圃、农用旱地、水田土壤ROC含量及其季节动态变化进行测定,以石栎-青冈次生林土壤为参照,计算土壤CMI,分析土壤ROC含量、CMI与土壤理化性状的关系。结果表明,同一土层ROC含量、ROC分配比例在不同土地利用类型之间差异显著,ROC含量表现为石栎-青冈次生林>毛竹林>水田>杉木人工林>农用旱地>苗圃,ROC分配比例为水田>石栎-青冈次生林>毛竹林>农用旱地>苗圃>杉木人工林;与石栎-青冈次生林相比,毛竹林、水田、杉木人工林、农用旱地、苗圃土壤ROC含量依次下降了9.8%~15.6%、22.0%~36.3%、27.6%~40.1%、47.4%~51.2%、58.0%~65.5%,水田、毛竹林、杉木人工林、农用旱地、苗圃土壤CMI依次下降了11.6%~18.4%、9.1%~20.9%、40.0%~44.1%、48.6%~51.5%和59.3%~66.6%;6种土地利用类型土壤ROC含量的季节变化节律基本一致,表现为春夏季较秋冬季高,夏季最高,冬季或秋季最低;土壤ROC含量、CMI与土壤SOC、全N、全P、水解N、有效P含量之间呈显著或极显著正相关,与土壤pH呈极显著负相关,与土壤含水率、全K、速效K不相关。土地利用方式对土壤ROC含量、CMI影响显著,次生林转变为人工林或农用地后,土壤碳库稳定性和生物可利用性下降。
语种:
中文
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亚热带4种林分类型枯落物层和土壤层的碳氮磷化学计量特征
作者:
喻林华;方晰;项文化;石俊;刘兆丹;...
期刊:
林业科学 ,2016年52(10):10-21 ISSN:1001-7488
通讯作者:
Fang, Xi
作者机构:
[方晰; 刘兆丹; 项文化; 石俊; 李雷达; 喻林华] Faculty of Life Science and Technology, Central South University of Forestry and Technology, Changsha, 410004, China;[方晰; 项文化] National Engineering Laboratory for Applied Technology of Forest &, Ecology in South China, Changsha, 410004, China
通讯机构:
Faculty of Life Science and Technology, Central South University of Forestry and Technology, Changsha, China
关键词:
养分含量;地表枯落物;分解层;生态化学计量比;杉木;人工林;次生林
摘要:
【目的】探讨亚热带森林恢复过程中枯落物层和土壤层的C,N,P含量及其化学计量比的变化规律,为阐明亚热带次生林恢复对土壤养分的影响及森林恢复提供科学依据。【方法】采用空间代替时间的方法,以湘中丘陵区杉木人工纯林、马尾松+ 石栎针阔混交林、南酸枣落叶阔叶林和石栎+ 青冈常绿阔叶林作为1个恢复系列,分别在其1 hm~2的长期定位观测样地内,沿着坡面选择6块10 m × 10 m小样地,每块小样地随机设置2个1.0 m × 1.0 m样方,采集地表未分解层、半分解层、已分解层枯落物和0 ~ 10,1 0 ~ 20和20 ~ 30 cm土层土壤样品,测定C,N,P含量并计算C,N,P的化学计量比。【结果】随着森林恢复和阔叶树比例增大,同一分解层枯落物C含量呈下降趋势,而N和P(除已分解层外) 含量大体呈增加趋势; C含量随枯落物分解而下降; 马尾松+石栎针阔混交林N含量表现为半分解层> 已分解层> 未分解层,杉木人工林、南酸枣落叶阔叶林、石栎+ 青冈常绿阔叶林表现为半分解层> 未分解层> 已分解层; 南酸枣落叶阔叶林P含量表现为未分解层> 半分解层> 已分解层,杉木人工林、马尾松+ 石栎针阔混交林和石栎+ 青冈常绿阔叶林均表现为半分解层最高,已分解层最低(除马尾松+ 石栎针阔混交林外); 同一分解层枯落物C∶ N、C∶ P和N∶ P比值随森林恢复而下降; C∶ N、C∶ P比值随枯落物分解而下降,N∶ P比值无明显变化规律; 同一土层C,N,P含量随森林恢复而增加; 4种林分0 ~ 30 cm土壤层C∶ N和C∶ P平均比值变化趋势基本一致,石栎+ 青冈常绿阔叶林最高,其次是马尾松+ 石栎针阔混交林,杉木人工林最低; 4种林分0 ~ 30 cm土壤层N∶ P平均比值无显著差异; 未分解层枯落物C含量与0 ~ 10和0 ~ 30 cm土层C,N,P含量显著负相关,而N,P含量与0 ~ 10和0 ~ 30 cm土壤层C,N(除N外), P含量显著正相关; 未分解层枯落物C∶ N、C∶ P和N∶ P比值与0 ~ 10和0 ~ 30 cm土壤层C(除N∶ P比值外), N,P含量显著负相关; 枯落物层C∶ N、C∶ P和N∶ P比值与土壤层C∶ N、C∶ P和N∶ P比值相关性不显著。【结论】随着森林恢复,阔叶树比例增大,枯落物层C∶ N、C∶ P和N∶ P比值逐渐下降,土壤层C,N,P含量增加,未分解层枯落物C,N,P含量及其化学计量比对土壤层C,N,P含量影响显著。在森林恢复和森林经营过程中,如何调整林分树种组成,改变枯落物层的质量显得十分关键。
语种:
中文
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土地利用方式对中亚热带山地土壤微生物生物量磷的影响
作者:
李胜蓝;方晰;李岩;项文化;张仕吉
期刊:
西北农林科技大学学报(自然科学版) ,2016年44(8):162-170 ISSN:1671-9387
作者机构:
[方晰; 李胜蓝; 项文化; 李岩] 中南林业科技大学生命科学与技术学院,湖南长沙410004;[方晰; 李胜蓝; 项文化; 李岩] 中南林业科技大学南方林业生态应用技术国家工程实验室,湖南长沙410004;中南林业科技大学材料科学与工程学院,湖南长沙,410004;[张仕吉] 中南林业科技大学
关键词:
中亚热带;土地利用方式;山地土壤;微生物生物量磷
摘要:
【目的】研究中亚热带山地不同土地利用方式土壤微生物生物量磷(MBP)的含量特征。【方法】在地处中亚热带地区的湖南长沙大山冲选取6种土地利用方式(杉木人工林、次生林(马尾松+石栎针阔混交林、南酸枣落叶阔叶林、石栎+青冈常绿阔叶林)、毛竹林和弃荒地)的样地,分别采集其0~15 cm和15~30 cm土层土壤样品,测定其MBP、全磷(TP)、有效磷(AP)、有机碳(SOC)、全氮(TN)含量,并测定样地的凋落物量和细根生物量,分析MBP与土壤养分(C、N、P)、凋落物量、细根生物量之间的关系。【结果】(1)6种土地利用方式土壤MBP含量均表现为0~15 cm土层高于15~30 cm土层,不同土地利用方式土壤MBP含量差异显著,毛竹林最高,杉木人工林最低。 (2)同一土层,不同土地利用方式土壤TP、AP含量差异显著,弃荒地、毛竹林较高,杉木人工林最低。(3)不同土地利用方式土壤MBP占TP含量百分比差异显著,毛竹林最高,其次是次生林、弃荒地,杉木人工林最低。(4)整个研究区土壤MBP与SOC、TN含量呈极显著正相关,与TP、AP不存在显著的相关性,杉木人工林、次生林土壤MBP与SOC、TP、AP含量呈显著或极显著正相关,但与凋落物量、细根生物量相关性不显著。【结论】不同土地利用方式土壤TP、SOC、TN含量的差异是导致土壤MBP含量差异的主要因素,人为活动(如施肥、耕作措施)是导致土壤MBP含量差异的直接因子之一。
语种:
中文
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不同年龄杉木人工林土壤有机磷的形态特征
作者:
曹娟;闫文德;项文化;谌小勇;梁小翠;...
期刊:
土壤通报 ,2016年47(3):681-687 ISSN:0564-3945
作者机构:
中南林业科技大学生命科学与技术学院, 湖南, 长沙, 410004;中南林业科技大学生命科学与技术学院, 南方林业生态应用技术国家工程实验室;[闫文德; 项文化] 湖南会同杉木林生态系统国家重点野外科学观测研究站, 湖南, 长沙, 410004;中南林业科技大学生命科学与技术学院, 南方林业生态应用技术国家工程实验室, 湖南, 长沙, 410004;[曹娟; 邓飘云] 中南林业科技大学生命科学与技术学院, 湖南, 长沙, 410004
关键词:
杉木林;土壤;有机磷;微生物量磷;有效磷
摘要:
对湖南会同不同发育阶段(3年生,8年生幼龄林、18年生中龄林、26年生成熟林)杉木人工林土壤有机磷各组分和有效磷(A-P)进行了研究,结果表明:4种不同林龄杉木林土壤有机磷(TOP)随土壤深度的增加而降低,从林龄上,8、18和26年生杉木林土壤TOP总量比3年生分别提高了71.20%,99.94%,74.91%;4组活性不同的有机磷组分中,中等活性有机磷(MLO-P)和中等稳定性有机磷(MRO-P)的相对含量较大,其次是活性有机磷(LO-P)和高稳性有机磷(HRO-P);土壤微生物生物量磷(MB-P)含量表层(0 ~ 20 cm)显著高于深层土壤(20 ~ 40 cm和40 ~ 60 cm);3年生、8年生和26年生林分, A-P含量与TOP呈显著正相关;3年生、8年生和26年生林分,A-P含量与MB-P含量显著相关。研究结果表明TOP和MB-P是本研究区A-P的重要来源。
语种:
中文
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Climate-driven increase of natural wetland methane emissions offset by human-induced wetland reduction in China over the past three decades
作者:
Zhu, Qiuan* ;Peng, Changhui* ;Liu, Jinxun;Jiang, Hong;Fang, Xiuqin;...
期刊:
Scientific Reports ,2016年6(1):38020 ISSN:2045-2322
通讯作者:
Zhu, Qiuan;Peng, Changhui
作者机构:
[Zhu, Qiuan; Peng, CH; Peng, Changhui; Wang, Meng; Yang, Yanzheng; Wang, Han] Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China.;[Zhu, Qiuan; Peng, CH; Peng, Changhui] Univ Quebec, Inst Environm Sci, Dept Biol Sci, Montreal H3C 3P8, PQ, Canada.;[Liu, Jinxun] US Geol Survey, Western Geog Sci Ctr, Menlo Pk, CA 94025 USA.;[Jiang, Hong] Nanjing Univ, Int Inst Earth Syst Sci, Nanjing 210093, Jiangsu, Peoples R China.;[Fang, Xiuqin] Hohai Univ, Earth Sci & Engn, Nanjing 210098, Jiangsu, Peoples R China.
通讯机构:
[Zhu, QA; Peng, CH] N;[Zhu, QA; Peng, CH] U;Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China.;Univ Quebec, Inst Environm Sci, Dept Biol Sci, Montreal H3C 3P8, PQ, Canada.
摘要:
Both anthropogenic activities and climate change can affect the biogeochemical processes of natural wetland methanogenesis. Quantifying possible impacts of changing climate and wetland area on wetland methane (CH4) emissions in China is important for improving our knowledge on CH4 budgets locally and globally. However, their respective and combined effects are uncertain. We incorporated changes in wetland area derived from remote sensing into a dynamic CH4 model to quantify the human and climate change induced contributions to natural wetland CH4 emissions in China over the past three decades. Here we found that human-induced wetland loss contributed 34.3% to the CH4 emissions reduction (0.92 TgCH4), and climate change contributed 20.4% to the CH4 emissions increase (0.31 TgCH4), suggesting that decreasing CH4 emissions due to human-induced wetland reductions has offset the increasing climate-driven CH4 emissions. With climate change only, temperature was a dominant controlling factor for wetland CH4 emissions in the northeast (high latitude) and Qinghai-Tibet Plateau (high altitude) regions, whereas precipitation had a considerable influence in relative arid north China. The inevitable uncertainties caused by the asynchronous for different regions or periods due to inter-annual or seasonal variations among remote sensing images should be considered in the wetland CH4 emissions estimation.
语种:
英文
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Significant effects of biodiversity on forest biomass during the succession of subtropical forest in south China
作者:
Ouyang, Shuai;Xiang, Wenhua* ;Wang, Xiangping;Zeng, Yelin;Lei, Pifeng;...
期刊:
Forest Ecology and Management ,2016年372:291-302 ISSN:0378-1127
通讯作者:
Xiang, Wenhua
作者机构:
[Ouyang, Shuai; Lei, Pifeng; Xiang, Wenhua; Zeng, Yelin; Deng, Xiangwen] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, 498 Southern Shaoshan Rd, Changsha 410004, Hunan, Peoples R China.;[Ouyang, Shuai; Lei, Pifeng; Xiang, Wenhua; Zeng, Yelin; Deng, Xiangwen] Huitong Natl Stn Sci Observat & Res Chinese Fir P, Huitong 438107, Hunan, Peoples R China.;[Wang, Xiangping] Beijing Forestry Univ, Coll Forestry, Key Lab Forest Resources & Ecosyst Proc Beijing, Beijing 100083, Peoples R China.;[Zeng, Yelin] Hunan Key Lab Forestry Biotechnol, Changsha 410004, Hunan, Peoples R China.;[Peng, Changhui] Univ Quebec, Dept Biol Sci, Inst Environm Sci, Montreal, PQ H3C 3P8, Canada.
通讯机构:
[Xiang, Wenhua] C;Cent South Univ Forestry & Technol, Fac Life Sci & Technol, 498 Southern Shaoshan Rd, Changsha 410004, Hunan, Peoples R China.
关键词:
Ecosystem function;Forest biomass;Functional diversity;Phylogenetic diversity;Species diversity;Succession stages
摘要:
Subtropical forests across south China have been extensively affected by anthropogenic disturbances with potential profound effects on plant biodiversity and ecosystem function (BEF). However, whether and to what degree biodiversity influences biomass of subtropical forests remains uncertain. In this study, we analyzed the effects of tree biodiversity (species diversity, functional diversity and phylogenetic diversity) on stand biomass at three stages (early, mid and late) of succession in subtropical forests. As forest succession progressed, we found that the changes in species diversity were different compared with those of functional and phylogenetic diversity. Most of the indices of species and functional and phylogenetic diversity were not significantly correlated with stand biomass at two spatial grains (plot sizes of 10 m × 10 m and 20 m × 30 m). However, when other abiotic and biotic factors (i.e., altitude, canopy light, stem density and forest phase) were included with diversity indices in mixed models to explain biomass, the effect of functional diversity on biomass was significant at both resolution. For species diversity indices, the effect was significant at the 20 m × 30 m resolution, and phylogenetic diversity had no significant effect. Our results indicate that biodiversity affects forest biomass during the succession of a subtropical forest and suggest that functional diversity may provide a better metric than species or phylogenetic diversity for determining the biodiversity effect on biomass. Moreover, our results indicate that the diverse conclusions reached in other BEF analyses might be explained by differences in the plot size examined and the diversity metrics selected. Because the bivariate relationship between biodiversity and biomass can be strongly confounded by covarying abiotic and biotic factors, we suggest that the effects of abiotic factors, succession stage, and management practices on BEF should be carefully considered in future research. © 2016 Elsevier B.V.
语种:
英文
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Towards a paradigm for open and free sharing of scientific data on global change science in china
作者:
Changhui Peng* ;Xinzhang Song;Hong Jiang;Qiuan Zhu;Huai Chen;...
期刊:
生态系统健康与可持续性(英文) ,2016年2(5):Article: e01225 ISSN:2096-4129
通讯作者:
Changhui Peng
作者机构:
[Changhui Peng; Qiuan Zhu] Laboratory for Ecological Forecasting and Global Change, College of Forestry, Northwest Agriculture and Forest University, Yangling, 712100China;[Xiaolu Zhou] Department of Biology Sciences, Institute of Environmental Sciences, University of Quebec at Montreal (UQAM), Case Postale 8888, Succursale Centre‐VilleMontreal, Quebec, H3C 3P8Canada;[Xinzhang Song] The Nurturing Station for the State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin’an, 311300China;[Hong Jiang] International Institute for Earth System Science, Nanjing University, Hankou Road 22Nanjing, 210093China;[Huai Chen] Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041China
通讯机构:
[Changhui Peng] L;Laboratory for Ecological Forecasting and Global Change, College of Forestry, Northwest Agriculture and Forest University, Yangling, 712100China;Department of Biology Sciences, Institute of Environmental Sciences, University of Quebec at Montreal (UQAM), Case Postale 8888, Succursale Centre‐VilleMontreal, Quebec, H3C 3P8Canada
关键词:
China;data sharing;global change science;policy
摘要:
Despite great progress in data sharing that has been made in China in recent decades, cultural, policy, and technological challenges have prevented Chinese researchers from maximizing the availability of their data to the global change science community. To achieve full and open exchange and sharing of scientific data, Chinese research funding agencies need to recognize that preservation of, and access to, digital data are central to their mission, and must support these tasks accordingly. The Chinese government also needs to develop better mechanisms, incentives, and rewards, while scientists need to change their behavior and culture to recognize the need to maximize the usefulness of their data to society as well as to other researchers. The Chinese research community and individual researchers should think globally and act personally to promote a paradigm of open, free, and timely data sharing, and to increase the effectiveness of knowledge development. © 2016, © 2016 Peng et al.
语种:
英文
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中亚热带4种森林类型土壤活性有机碳的季节动态特征
作者:
辜翔;张仕吉;项文化;李雷达;刘兆丹;...
期刊:
植物生态学报 ,2016年40(10):1064-1076 ISSN:1005-264X
通讯作者:
Fang, X.
作者机构:
中南林业科技大学生命科学与技术学院,长沙,410004;中南林业科技大学材料科学与工程学院,长沙,410004;[方晰; 项文化] 中南林业科技大学生命科学与技术学院,长沙410004;[方晰; 项文化] 南方林业生态应用技术国家工程实验室,长沙410004;[方晰; 项文化] 湖南会同杉木林生态系统国家野外科学观测研究站,湖南会同438107
通讯机构:
[Fang, X.] S;School of Life Science and Technology, Central South University of Forestry and Technology, Changsha, China
关键词:
湘中丘陵区;次生林;杉木人工林;土壤活性有机碳;季节变化
摘要:
2011年12月至2012年9月,在湘中丘陵区杉木(Cunninghamia lanceolata)人工林、马尾松(Pinus massoniana)-石栎(Lithocarpus glaber)针阔混交林、南酸枣(Choerospondias axillaries)落叶阔叶林、石栎(Lithocarpus glaber)-青冈(Cyclobalanopsis glauca)常绿阔叶林1 hm~2的长期定位观测样地,采集0~15cm、15-30 cm土层土壤样品,测定土壤微生物生物量碳(MBC)、可矿化有机碳(MOC)、易氧化有机碳(ROC)、水溶性有机碳(DOC)含量,分析4种森林土壤MBC、MOC、ROC、DOC含量的季节变化特征,为揭示天然林保护与恢复对土壤有机碳(SOC)库的影响机理过程提供基础数据。结果表明:森林土壤MBC、MOC、ROC、DOC含量具有明显的季节动态,且不同森林同一土壤活性有机碳组分的季节变化节律基本一致,MBC、MOC、ROC含量表现为夏、秋季较高,春、冬季较低;DOC含量表现为春、夏、冬季较高,秋季最低;同一森林不同土壤活性有机碳组分含量的季节变化节律不同;土壤MBC、MOC、ROC、DOC含量与土壤自然含水率、SOC、全N、水解N、全P (除杉木人工林土壤MBC、MOC、ROC外)、速效P含量显著或极显著正相关,与土壤pH值、全K、速效K含量相关性不显著,表明不同森林类型外源碳库投入和土壤理化性质的差异是导致不同森林类型土壤活性有机碳含量差异显著的主要原因,该区域森林土壤活性有机碳各组分含量的季节变化与各森林类型组成树种生长节律及其土壤水分含量和SOC、N、P的可利用性,以及土壤活性有机碳各组分的来源有关,森林土壤MBC、MOC、ROC、DOC含量可作为衡量森林土壤C、N、P动态变化的敏感性指标。
语种:
中文
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广西海南风吹楠群落区系组成、结构与特征
作者:
蒋迎红;项文化;蒋燚;何应会;林建勇
期刊:
北京林业大学学报 ,2016年38(1):74-82 ISSN:1000-1522
通讯作者:
Xiang, W.-H.
作者机构:
[项文化] Central South University of Forestry and Technology, Changsha, Hunan 410004, China;Guangxi Department of Forestry Protection, Nanning, Guangxi 530028, China;[蒋迎红; 何应会; 林建勇] Guangxi Academy of Forestry, Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation, Nanning, Guangxi 530002, China;[蒋燚] Central South University of Forestry and Technology, Changsha, Hunan 410004, China, Guangxi Department of Forestry Protection, Nanning, Guangxi 530028, China
通讯机构:
[Xiang, W.-H.] C;Central South University of Forestry and Technology, Changsha, Hunan, China
关键词:
海南风吹楠;群落特征;植物区系;濒危植物
摘要:
通过野外样地调查,对广西5个海南风吹楠群落特征进行比较分析,结果表明:在6 100 m~2样地中,维管束植物共261种,隶属于94科196属,其中热带分布的科、属均占绝对优势,海南风吹楠群落具有从热带向亚热带过渡的性质。海南风吹楠群落以草本植物种类最多,所占比例为38.3%,草本植物覆盖度和物种丰富度与林分郁闭度和灌木植物覆盖度存在显著负相关性。群落的层间植物种类丰富,占16.7%。乔木层以常绿树种占优势,优势科主要有大戟科、肉豆蔻科、梧桐科、云实科、桑科等典型的热带、亚热带科。
语种:
中文
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中亚热带南酸枣落叶阔叶林土壤磷素空间变异及其影响因素
作者:
胡瑞彬;方晰;项文化;蒋芳;雷丕锋;...
期刊:
应用生态学报 ,2016年27(3):705-715 ISSN:1001-9332
通讯作者:
Fang, X.
作者机构:
中南林业科技大学生命科学与技术学院, 长沙, 410004;中南林业科技大学生命科学与技术学院, 南方林业生态应用技术国家工程实验室;[方晰; 项文化; 雷丕锋; 邓湘雯] 国家野外科学观测研究站, 长沙, 410004;中南林业科技大学生命科学与技术学院, 南方林业生态应用技术国家工程实验室, 长沙, 410004;[胡瑞彬; 蒋芳; 朱文娟] 中南林业科技大学生命科学与技术学院, 长沙, 410004
通讯机构:
[Fang, X.] C
关键词:
南酸枣落叶阔叶林;土壤磷;空间异质性;地统计学;GIS技术
摘要:
在湖南省长沙县大山冲国有林场南酸枣落叶阔叶林建立1 hm~2固定样地,基于植物群落学调查数据和等距离网格布点取样的土壤养分测定数据,采用地统计学和GIS相结合的方法,研究土壤P含量的空间变异特征及其影响因子.结果表明:腐殖质层及0~ 10、10~ 20、 20~30 cm土层的全P、有效P含量的均为中等强度变异,同一土层有效P含量的变异程度较全P含量高,随着土壤深度增加,全P、有效P含量下降,变异程度增大.土壤全P、有效P含量具有较高的空间自相关性,主要受结构性因素影响.有效P含量的空间异质性较全P强,各土层全P、有效P含量空间自相关范围分别为92.80~ 168.90 m、79.43~ 106.20 m.同一土层全P含量分维数高于有效P,空间格局较有效P复杂,有效P含量空间依赖性更强,具有更好的结构性.腐殖质层及0~10、10~20、20~30 cm土层的全P、有效P含量呈现条带状和斑块状梯度性分布,且全P、有效P含量的空间变化趋势基本一致,高值出现在洼地,低值则出现在山脊.全P、有效P含量与高程、地表凋落物现存量呈显著负相关,与凹凸度、树种种数、株数、土壤pH相关性不显著,与土壤有机C、全N含量呈显著正相关.这反映出土壤P的淋溶特性,其空间变异性受到多种因子相互作用的影响.
语种:
中文
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湖南省森林植被碳储量、碳密度动态特征
作者:
刘兆丹;李斌;方晰;项文化;田大伦;...
期刊:
生态学报 ,2016年36(21):6897-6908 ISSN:1000-0933
通讯作者:
Lei, P.F.
作者机构:
中南林业科技大学生命科学与技术学院, 长沙, 410004;中南林业科技大学生命科学与技术学院, 南方林业生态应用技术国家工程实验室, 长沙, 410004;[刘兆丹; 李斌] 中南林业科技大学生命科学与技术学院, 长沙, 410004;[方晰; 项文化; 田大伦; 闫文德; 雷丕锋] 中南林业科技大学生命科学与技术学院, 南方林业生态应用技术国家工程实验室, 长沙, 410004
通讯机构:
College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, China
关键词:
湖南省;森林植被;碳储量;碳密度;动态变化
摘要:
利用湖南省4次(1983—1987年、1990—1995年、2003—2004年和2009年)森林资源清查数据,采用材积源-生物量法,结合湖南省现有森林植被主要树种碳含量实测数据,研究近20多年来湖南省森林植被碳储量、碳密度的动态特征。结果表明:从1987年到2009年,湖南省乔木林植被碳汇为66.40×10~6 tC,碳密度提高了5.65 tC/hm~2,阔叶林碳汇最大(48.43×10~6 tC), 其次是杉木林(9.54×10~6 tC)和松木林(6.68×10~6 tC), 各乔木林植被碳密度波动较大;除过熟林外,各龄组乔木林均为碳汇,中龄林碳汇最大,幼龄林、中龄林、近熟林植被碳密度依次提高了4.75、4.09、0.83 tC/hm~2,成熟林、过熟林分别下降了6.87、13.88 tC/hm~2;天然林、人工林植被碳汇分别为41.01×10~6 tC、25.39×10~6 tC,碳密度分别提高了7.19、4.91 tC/hm~2。湖南省森林植被(包括疏林)碳汇为84.87×10~6 tC,乔木林碳汇最大,其次是竹林,分别占湖南省森林植被碳汇的78.24%和33.31%,碳密度提高了6.24 tC/hm~2,各森林类型植被碳储量随其面积变化而变化。表明近20多年来,湖南省乔木林植被单位面积储碳能力明显提高,天然林在湖南省乔木林植被碳储量占有重要地位。
语种:
中文
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不同高程短尖苔草对水位变化的生长及繁殖响应
作者:
李亚芳;陈心胜;项文化;谢永宏
期刊:
生态学报 ,2016年36(7):1959-1966 ISSN:1000-0933
通讯作者:
Xie, Y.H.
作者机构:
中南林业科技大学生命科学与技术学院, 中国科学院洞庭湖湿地生态系统观测研究站, 长沙, 410004;中国科学院亚热带农业生态研究所, 中国科学院洞庭湖湿地生态系统观测研究站, 长沙, 410125;中南林业科技大学生命科学与技术学院, 长沙, 410004;[李亚芳] 中南林业科技大学生命科学与技术学院, 中国科学院洞庭湖湿地生态系统观测研究站, 长沙, 410004;[陈心胜; 谢永宏] 中国科学院亚热带农业生态研究所, 中国科学院洞庭湖湿地生态系统观测研究站, 长沙, 410125
通讯机构:
Dongting Lake Station for Wetland Ecosystem Research, Institute of Subtropical Agriculture, The Chinese Academy Sciences, Changsha, China
关键词:
水位;克隆繁殖;湿地植物;洞庭湖
摘要:
在淡水湿地生态系统中,水位通常是制约植被生长和繁殖动态的关键因素,进而对物种组成、群落演替和植被分布格局产生决定性影响。无性繁殖是洞庭湖湿地克隆植物适应环境胁迫的重要策略之一,以洞庭湖湿地典型克隆植物-短尖苔草(Carex brevicuspis C.B.Clarke)为对象,研究了不同分布高程(23.7 m和25.8 m)的植物对水位变化(0 cm,-15 cm,-30 cm)的生长和繁殖特征响应。结果表明:水位变化对不同分布高程分布短尖苔草的生长和克隆繁殖特征均产生显著影响(P<0.05)。对高程区的短尖苔草而言,克隆繁殖特征如分株数、分株总生物量、芽数和芽生物量随水位的降低而增加,而对生长特征(株高及总生物量)无显著影响(P>0.05),表明适当干旱有利于高程区苔草的克隆繁殖。对于低程区分布短尖苔草而言,水位变化对其生长特征有显著影响(P<0.05),如株高和总生物量随着水位的降低而增加;分株数和总芽生物量等克隆繁殖特征则随水位的降低而减少,而水位对低程区短尖苔草的分株总生物量和总芽数影响不显著(P>0.05)。因此,短尖苔草的克隆繁殖特征除受到水位的影响外,还受其分布高程的影响。可见,同一种短尖苔草因长期适应于不同生境而对相同的环境胁迫表现出了不同的生长繁殖策略.
语种:
中文
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Spatial and seasonal variations of leaf area index (LAI) in subtropical secondary forests related to floristic composition and stand characters
作者:
Zhu, Wenjuan;Xiang, Wenhua* ;Pan, Qiong;Zeng, Yelin;Ouyang, Shuai;...
期刊:
Biogeosciences ,2016年13(12):3819-3831 ISSN:1726-4170
通讯作者:
Xiang, Wenhua
作者机构:
[Zhu, Wenjuan; Ouyang, Shuai; Lei, Pifeng; Xiang, Wenhua; Pan, Qiong; Zeng, Yelin; Fang, Xi; Peng, Changhui; Deng, Xiangwen] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;[Zhu, Wenjuan; Ouyang, Shuai; Lei, Pifeng; Xiang, Wenhua; Fang, Xi; Deng, Xiangwen] Huitong Natl Field Stn Sci Observat & Res Chinese, Huitong 438107, Peoples R China.;[Ouyang, Shuai; Lei, Pifeng; Xiang, Wenhua; Fang, Xi; Deng, Xiangwen] Natl Engn Lab Appl Technol Forestry & Ecol Southe, Changsha 410004, Hunan, Peoples R China.;[Pan, Qiong] Changsha Environm Protect Coll, Changsha 410004, Hunan, Peoples R China.;[Peng, Changhui] Univ Quebec, Inst Environm Sci, Dept Biol Sci, Montreal, PQ H3C 3P8, Canada.
通讯机构:
[Xiang, Wenhua] C;[Xiang, Wenhua] H;[Xiang, Wenhua] N;Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;Huitong Natl Field Stn Sci Observat & Res Chinese, Huitong 438107, Peoples R China.
摘要:
Leaf area index (LAI) is an important parameter related to carbon, water, and energy exchange between canopy and atmosphere and is widely applied in process models that simulate production and hydrological cycles in forest ecosystems. However, fine-scale spatial heterogeneity of LAI and its controlling factors have yet to be fully understood in Chinese subtropical forests. We used hemispherical photography to measure LAI values in three subtropical forests (Pinus massoniana-Lithocarpus glaber coniferous and evergreen broadleaved mixed forests, Choerospondias axillaris deciduous broadleaved forests, and L. glaber-Cyclobalanopsis glauca evergreen broadleaved forests) from April 2014 to January 2015. Spatial heterogeneity of LAI and its controlling factors were analysed using geostatistical methods and the generalised additive models (GAMs) respectively. Our results showed that LAI values differed greatly in the three forests and their seasonal variations were consistent with plant phenology. LAI values exhibited strong spatial autocorrelation for the three forests measured in January and for the L. glaber-C. glauca forest in April, July, and October. Obvious patch distribution pattern of LAI values occurred in three forests during the non-growing period and this pattern gradually dwindled in the growing season. Stem number, crown coverage, proportion of evergreen conifer species on basal area basis, proportion of deciduous species on basal area basis, and forest types affected the spatial variations in LAI values in January, while stem number and proportion of deciduous species on basal area basis affected the spatial variations in LAI values in July. Floristic composition, spatial heterogeneity, and seasonal variations should be considered for sampling strategy in indirect LAI measurement and application of LAI to simulate functional processes in subtropical forests. © Author(s) 2016.
语种:
英文
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亚热带4种森林生物量估算转换参数的研究
作者:
侯燕南;吴惠俐;项文化;邓湘雯
期刊:
中南林业科技大学学报 ,2016年36(8):57-65 ISSN:1673-923X
作者机构:
[侯燕南] 中南林业科技大学生命科学与技术学院,湖南长沙 410004;湖南省林业厅造林处,湖南长沙 410004;中南林业科技大学生命科学与技术学院,湖南长沙,410004;[吴惠俐; 邓湘雯; 项文化] 中南林业科技大学;[侯燕南] 湖南省林业厅造林处,湖南长沙 410004
关键词:
杉木林:马尾松林;落叶阔叶林;常绿阔叶林;木材密度;生物量扩展因子;林分因子
摘要:
对我国亚热带森林资源调查中典型的4种森林类型(杉木林、马尾松林、落叶阔叶林和常绿阔叶林)的林分生物量数据进行整合分析,计算4种森林类型从林分蓄积量估算林分生物量的主要转换参数平均值,并分析影响转换参数的林分因子。结果表明:(1)杉木林、马尾松林、落叶阔叶林和常绿阔叶林4种森林类型中优势树种的木材基本密度平均值分别为0.313 3、0.412 5、0.502 1和0.527 4,木材基本密度因树种种源、种系、立地条件、林龄、林分密度等因子的不同而不同。(2)杉木林、马尾松林、落叶阔叶林和常绿阔叶林生物量扩展因子的平均值分别为1.308 9、1.265 4、1.423 3和1.391 3,根冠比的平均值分别为0.169 4、0.177 2、0.239 1和0.263 5。(3) 4种森林类型的生物量扩展因子和根冠比随林龄、平均胸径和平均树高的增加而减少,随林分密度的增加而增加。4种森林类型的生物量估算转换参数间存在明显的差异,因此,在估算森林生物量时应按具体的森林类型进行估算,同时还应考虑林龄、林分密度、平均胸径和平均树高等林分因子的影响。
语种:
中文
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湘西南喀斯特地区灌丛生态系统植物和土壤养分特征
作者:
李艳琼;邓湘雯;易昌晏;邓东华;黄志宏;...
期刊:
应用生态学报 ,2016年27(4):1015-1023 ISSN:1001-9332
通讯作者:
Deng, X.-W.
作者机构:
[李艳琼; 景宜然] College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, 410004, China;National Engineering Laboratory for Applied Technology of Forestry & Ecology in South China, Changsha, 410004, China;[邓东华; 易昌晏] Shaoyang Bureau of Forestry, Shaoyang, 422100, China;[黄志宏; 邓湘雯; 项文化; 方晰] College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, 410004, China, National Engineering Laboratory for Applied Technology of Forestry & Ecology in South China, Changsha, 410004, China
通讯机构:
[Deng, X.-W.] C;College of Life Science and Technology, China
关键词:
灌丛生态系统;石漠化;植物养分;土壤养分
摘要:
以湖南省邵阳县轻度、中度(弃耕地)和重度石漠化的灌丛生态系统为研究对象,采集3种不同石漠化程度的灌丛植物样品以及0 ~ 15、15 ~ 30、30 ~ 45 cm 3个土层土壤,研究土壤、植被养分的分配格局及相互关系. 结果表明: 土壤有机碳、全N含量在不同土层中差异显著,且其含量均随土层深度增加而减少,而全P、全K、全Ca、全Mg含量在各土层间无显著差异; 3种石漠化程度灌丛土壤全N、全P、全Ca、全Mg含量差异显著,且中度石漠化样地土壤有机碳、全N和全P含量相对较高. 轻度和重度石漠化土壤各元素含量排序均为有机碳>全K>全Ca>全Mg>全N>全P,而中度石漠化样地土壤各元素含量排序为有机碳>全K>全Ca>全N>全Mg>全P; 3种石漠化程度植物各养分含量由高到低依次为Ca>N>K>Mg>P,且植物N、P含量和土壤全N、全P含量均呈显著正相关. 土壤养分状况与植物生长密切相关,根据不同石漠化程度土壤养分状况,应该采用封山育林与人工造林相结合以及针对性施肥的方法来治理石漠化.
语种:
中文
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南酸枣落叶阔叶林土壤有机碳空间变异及影响因素
作者:
蒋芳;吴小红;项文化
期刊:
广西林业科学 ,2016年45(2):143-148 ISSN:1006-1126
作者机构:
[吴小红; 项文化; 蒋芳] 中南林业科技大学生命科学与技术学院,湖南 长沙410004;[吴小红; 项文化; 蒋芳] 南方林业生态应用技术国家工程实验室,湖南 长沙410004
关键词:
南酸枣;落叶阔叶林;土壤有机碳;空间异质性;地统计学
摘要:
采用地统计学方法分析了南酸枣(Choerospondias axillaris)落叶阔叶林不同土层(0~ 10 cm、10~ 20cm、20~ 30 cm)土壤有机碳含量的空间异质性特征及其影响因素.结果表明:不同层次土壤有机碳含量范围为4.67~ 46.34 g/kg,变异程度为27.09%~43.75%,属于中等程度变异,且变异程度随土层深度加深而变大.半方差函数分析显示土壤有机碳含量表现出强烈的空间自相关关系,表明土壤有机碳空间异质性主要由结构性因素引起;土壤有机碳含量变程(A0)范围为12.3~28.8 m.空间插值(Ordinary Kriging)结果显示土壤有机碳含量的高值分布在低海拔或洼地,呈现出明显的条带状和斑块状分布.海拔、凋落物、凹凸度、含水率显著影响土壤有机碳含量的空间分布.
语种:
中文
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