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中国科学院昆明植物研究所知识管理系统
Knowledge Management System of Kunming Institute of Botany,CAS
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6 could use lots of photosynthates, but contributed little to the accumulation of biomass. 4. Photosynthetic rate of P. armeniacum decreased a little at the noon, and the highest photosynthetic rate was observed at 10:00h in the greenhouse. The variation of photosynthetic rate was in the same trend as stomatal conductance. Higher relative humidity seemed to be the key for higher photosynthetic rate in P. armeniacum. 5. The photosynthetic capacity of C. flavum was statistically larger than that of P. armeniacum. The lower leaf photosynthetic capacity of P. armeniacum was related to its lower leaf nitrogen concentration,leaf phosphorus concentration and enzyme activities. Meanwhile, the extremely lower stomatal conductance and internal mesophyll conductance might greatly limit the photosynthetic capacity of P. armeniacum. The lower stomatal conductance and photosynthetic rate of Paphiopedilum might partially caused by the lack of chloroplasts in the guard cell of Paphiopedilum. Compared with C. flavum, P. armeniacum was more fond of shade environment.6. The short longevity leaf of Cypripedium had bigger photosynthetic capacity and greater potential for fast growth. But the longer LL of Paphiopedilum enhanced nutrient conservation which could compensate its lower photosynthetic capacity. The short longevity leaf of Cypripedium usually had higher photosynthetic rate per unit leaf mass and dark respiration rate, and photosynthetic capacity decreased fast with leaf age. However, for Paphiopedilum, the situation was the opposite. 7. Compared with Cypripedium, Paphiopedilum had higher water use efficiency and lower photosynthetic nitrogen use efficiency. 8. The leaf of Paphiopedilum had higher leaf construction cost and longer repayment time than that of Cypripedium. The leaf structures and physiological functions of Paphiopedilum and Cypripedium reflected the adaptation to their habitats. The leaf morphological and physiological evolution of Paphiopedilum was related to water and resource-conserving traits in the karst habitat. The leaf traits of Cypripedium were the adaptation to the environment rich in water and nutrients but easy to change with seasons.Our results provided evidence of divergent evolution of congeneric orchids under natural 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yunnanensis is one of the main timber species in Yunnan province, and widely distributed in southwest of China. Forest stand growth models are built for predicting stand growth, which could provide useful quantitative information for forest management. Understanding stand growth is also important for estimating forest carbon stock and carbon sequestration. Several studies of growth model for Pinus yunnanensis have been reported, however, most of which focus on a specific part of growth model. Therefore, it is necessary and meaningful to further the study of growth model for important stand factors. As a scaling-up tool for the observational data, remote sensing technique makes scaling biomass estimation from ground plot to a large scale more feasible and effective. Stand growth model was studied based on 91 sample plots data collected in the Yangliu Township, Longyang District, Baoshan Prefecture. Nonlinear fitting was used in fitting and selecting alternative growth functions, models of site index, density and stand age, average DBH, average tree height and stock volume were built in this study. Stock volume calculated from plot data was converted to aboveground biomass, belowground biomass and carbon stock according to selected equations and parameters. A total of 18 remote sensing variables were derived from SPOT 4 imagery, including reflectance of each band, normalized difference vegetation index, ration vegetation index, etc. The correlationship between aboveground biomass and remote sensing variables was analyzed, based on their significance of correlation, multiple regression, stepwise regression, nonlinear fitting were used to establish the aboveground biomass model. The effect of image processing levels on biomass estimation was compared, 3 types of images were analyzed including fusioned image without radiometric correction, radiometrically corrected to top of atmosphere (TOA) reflectance, and atmospherically corrected to surface reflectance. The main conclusions of this study are as follow: (1) Schumacher function fitted the stand growth better in site index, single variable average DBH, average tree height and stock volume growth model. Models fitted from Schumacher were more stable as the coefficient of variation was much lower than other alternative functions. S function was the best model in the fitting between stand density and age. (2) Comparing with the single variable average DBH growth model, fitting was improved a little after reparameterizing the model by introducing site index and stand density index variables. Stepwise regression improved the fitting significantly, the model with average tree height, density and age variables had best fitting without colinearity between variables. Repameterizing the average tree height growth model improved the fitting results a lot by introducing site index and density index variables. (3) Single age variable stock volume growth model had low coefficient of determination, but it was improved a lot by introducing site index and stand density index in reparameterization. Stand age was excluded in the stepwise regression modles, if raplace average tree height with stand age, the stepwise regression model that included age variable had higher coefficient of dertmination, but might have collinearity between variables when using a higher colinearity caritia. (4) Image analysis indicated that middle infrared was an important band for biomass estimation, and atmpspheric correction could improve fitting results of aboveground bimass model. Modified ratio vegetation index calculated from middle infrared and red band had highest correlation coefficient with aboveground biomass in pansharpened image, while modified NDVI derived from middle infrared and red band had highest coefficient in both radometrically corrected image. Comparing the fitting results of multiregression, stepwise regression and single variable nonlinear fitting, S biomass model was the most suitable model in all images. The final aboveground biomass S model was built from the atmospherically corrected image with modified NDVI as variable. Biomass estimation error of S model with surface reflectance image was evaluated, results shown estimation had high root of mean square error (RMSE), and quite small relative bias, which indicating that this method was suitable for mapping biomass spatial distribution on large scale. Finally, above ground biomass and carbon stock of Pinus yunnanensis were estimated with S model and surface reflectance 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Reproductive Allocation in Plants
期刊论文
Reproductive Allocation in Plants, 3111, 页码: 1—30
作者:
Shuhei Tanaka
;
Shin-ichiro Kochi
;
Heigo Kunita
;
Shin-ichi Ito
;
Mitsuro Kameya-Iwaki
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浏览/下载：148/1
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提交时间：2017/07/19
Anthropogenic impact on Earth’shydrological cycle
期刊论文
NATURE CLIMATE CHANGE, 3111, 期号: 0, 页码: 1—4
作者:
PeiliWu
;
Nikolaos Christidis
;
Peter Stott
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提交时间：2017/07/21
Shifting plant phenology in responseto global change
期刊论文
TRENDS in Ecology and Evolution, 3111, 卷号: 22, 页码: 357-365
作者:
Elsa E. Cleland
;
Isabelle Chuine
;
Annette Menzel
;
Harold A. Mooney
;
Mark D. Schwartz
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提交时间：2017/07/19
Outlook for advanced biofuels
期刊论文
Energy Policy, 3111, 期号: 0
作者:
Carlo N Hamelinck
;
AndreP.C. Faaij
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提交时间：2017/07/24
Prospects
Well-to-wheel
Strong priming of soil organic matter induced by frequent input of labile carbon
期刊论文
SOIL BIOLOGY & BIOCHEMISTRY, 2021, 卷号: 152, 页码: 108069
作者:
Zhou,Jie
;
Wen,Yuan
;
Shi,Lingling
;
Marshall,Miles R.
;
Kuzyakov,Yakov
;
Blagodatskaya,Evgenia
;
Zang,Huadong
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浏览/下载：91/0
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提交时间：2022/04/02
Carbon balance
Enzyme kinetics
Fungal community
Microbial growth kinetics
Priming effect
Soil organic matter
MICROBIAL BIOMASS
ATMOSPHERIC CO2
DIVERSITY
NITROGEN
DECOMPOSITION
MECHANISMS
GLUCOSE
FUNGI
IDENTIFICATION
SEQUESTRATION
Impact of land use and land cover changes on carbon storage in rubber dominated tropical Xishuangbanna, South West China
期刊论文
ECOSYSTEM HEALTH AND SUSTAINABILITY, 2021, 卷号: 7, 期号: 1, 页码: 1915183
作者:
Sarathchandra,Chaya
;
Alemu Abebe,Yirga
;
Worthy,Fiona Ruth
;
Lakmali Wijerathne,Iresha
;
Ma,Huaixia
;
Bi,Yingfeng
;
Guo,Jiayu
;
Chen,Huafang
;
Yan,Qiaoshun
;
Geng,Yanfei
;
Weragoda,Dayani S.
;
Li,Li-Li
;
Yang,Fengchun
;
Wickramasinghe,Sriyani
;
Xu,Jianchu
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提交时间：2022/04/02
Carbon storage
deforestation
economic plantations
ecosystem services
land cover changes
land use
PROTECTED AREAS
ABOVEGROUND BIOMASS
TREE GROWTH
FOREST
STOCKS
SEQUESTRATION
AGROFORESTRY
BIODIVERSITY
YUNNAN
AFFORESTATION
Elevated CO2 Concentration Alters Photosynthetic Performances under Fluctuating Light in Arabidopsis thaliana
期刊论文
CELLS, 2021, 卷号: 10, 期号: 9, 页码: 2329
作者:
Tan,Shun-Ling
;
Huang,Xing
;
Li,Wei-Qi
;
Zhang,Shi-Bao
;
Huang,Wei
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提交时间：2022/04/02
CO2 concentration
photosynthesis
photosystem I
redox state of P700
CYCLIC ELECTRON FLOW
PROTON MOTIVE FORCE
PHOTOSYSTEM-I
FLAVODIIRON PROTEINS
TRANSPORT
GROWTH
PHOTOINHIBITION
PHOTOPROTECTION
ASSIMILATION
PSI
Water relations of trailing-edge evergreen oaks in the semi-arid upper Yangtze region, SE Himalaya
期刊论文
JOURNAL OF SYSTEMATICS AND EVOLUTION, 2021, 卷号: 59, 期号: 6, 页码: 1256-1265
作者:
He,Xiao-Fang
;
Wang,Song-Wei
;
Sun,Hang
;
Koerner,Christian
;
Yang,Yang
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提交时间：2022/04/02
adaptation
Himalaya
monsoon climate
Quercus
species distribution
water stress
CARBON ISOTOPE DISCRIMINATION
SOUTHERN RANGE-EDGE
QUERCUS-ROBUR
GROWTH DECLINE
USE EFFICIENCY
FOREST TREES
RESPONSES
DROUGHT
PHOTOSYNTHESIS
ILEX
Vegetative anatomy and photosynthetic performance of the only known winter-green Cypripedium species: implications for divergent and convergent evolution of slipper orchids
期刊论文
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY, 2021, 卷号: 197, 期号: 4, 页码: 527-540
作者:
Zhang,Wei
;
Feng,Jing-Qiu
;
Kong,Ji-Jun
;
Sun,Lu
;
Fan,Ze-Xin
;
Jiang,Hong
;
Zhang,Shi-Bao
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提交时间：2022/04/02
Cypripedioideae
Cypripedium subtropicum
endangered plant
habit shift
leaf trait
Paphiopedilum
physiological diversity
photosynthetic acclimation
DECIDUOUS LEAVES
LEAF ANATOMY
ACCLIMATION
PAPHIOPEDILUM
POPULATIONS
IRRADIANCE
RESPONSES
CHLOROPLAST
MANAGEMENT
CALCEOLUS
Microplastics as an emerging threat to plant and soil health in agroecosystems
期刊论文
SCIENCE OF THE TOTAL ENVIRONMENT, 2021, 卷号: 787, 页码: 147444
作者:
Zhou,Jie
;
Wen,Yuan
;
Marshall,Miles R.
;
Zhao,Jie
;
Gui,Heng
;
Yang,Yadong
;
Zeng,Zhaohai
;
Jones,Davey L.
;
Zang,Huadong
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浏览/下载：128/57
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提交时间：2022/04/02
Microplastics
Plant growth
Soil carbon storage
Nutrient cycling
Greenhouse gas emissions
Biodegradable plastics
Agroecosystem
POLYSTYRENE LATEX NANOPARTICLES
ORGANIC-MATTER
PLASTIC MULCH
FILM RESIDUES
CARBON
NITRIFICATION
MECHANISMS
CYTOTOXICITY
NANOPLASTICS
EMISSIONS
