Accéder au contenu Accéder au menu principal Accéder à la recherche
Accéder au contenu Accéder au menu principal
UQAM logo
Page d'accueil de l'UQAM Étudier à l'UQAM Bottin du personnel Carte du campus Bibliothèques Pour nous joindre

Service des bibliothèques

Centre pour l’étude et la simulation du climat à l’échelle régionale (ESCER)
UQAM logo
Centre pour l’étude et la simulation du climat à l’échelle régionale (ESCER)
  • Bibliographie
  • Accueil
  1. Vitrine des bibliographies
  2. Centre pour l’étude et la simulation du climat à l’échelle régionale (ESCER)
  3. Résultats
  • Accueil

Votre recherche

Réinitialiser la recherche

Aide

L’interface de recherche est composée de trois sections : Rechercher, Explorer et Résultats. Celles-ci sont décrites en détail ci-dessous.

Vous pouvez lancer une recherche aussi bien à partir de la section Rechercher qu’à partir de la section Explorer.

Rechercher

Cette section affiche vos critères de recherche courants et vous permet de soumettre des mots-clés à chercher dans la bibliographie.

  • Chaque nouvelle soumission ajoute les mots-clés saisis à la liste des critères de recherche.
  • Pour lancer une nouvelle recherche plutôt qu’ajouter des mots-clés à la recherche courante, utilisez le bouton Réinitialiser la recherche, puis entrez vos mots-clés.
  • Pour remplacer un mot-clé déjà soumis, veuillez d’abord le retirer en décochant sa case à cocher, puis soumettre un nouveau mot-clé.
  • Vous pouvez contrôler la portée de votre recherche en choisissant où chercher. Les options sont :
    • Partout : repère vos mots-clés dans tous les champs des références bibliographiques ainsi que dans le contenu textuel des documents disponibles.
    • Dans les auteurs ou contributeurs : repère vos mots-clés dans les noms d’auteurs ou de contributeurs.
    • Dans les titres : repère vos mots-clés dans les titres.
    • Dans tous les champs : repère vos mots-clés dans tous les champs des notices bibliographiques.
    • Dans les documents : repère vos mots-clés dans le contenu textuel des documents disponibles.
  • Vous pouvez utiliser les opérateurs booléens avec vos mots-clés :
    • ET : repère les références qui contiennent tous les termes fournis. Ceci est la relation par défaut entre les termes séparés d’un espace. Par exemple, a b est équivalent à a ET b.
    • OU : repère les références qui contiennent n’importe lequel des termes fournis. Par exemple, a OU b.
    • SAUF : exclut les références qui contiennent le terme fourni. Par exemple, SAUF a.
    • Les opérateurs booléens doivent être saisis en MAJUSCULES.
  • Vous pouvez faire des groupements logiques (avec les parenthèses) pour éviter les ambiguïtés lors de la combinaison de plusieurs opérateurs booléens. Par exemple, (a OU b) ET c.
  • Vous pouvez demander une séquence exacte de mots (avec les guillemets droits), par exemple "a b c". Par défaut la différence entre les positions des mots est de 1, ce qui signifie qu’une référence sera repérée si elle contient les mots et qu’ils sont consécutifs. Une distance maximale différente peut être fournie (avec le tilde), par exemple "a b"~2 permet jusqu’à un terme entre a et b, ce qui signifie que la séquence a c b pourrait être repérée aussi bien que a b.
  • Vous pouvez préciser que certains termes sont plus importants que d’autres (avec l’accent circonflexe). Par exemple, a^2 b c^0.5 indique que a est deux fois plus important que b dans le calcul de pertinence des résultats, tandis que c est de moitié moins important. Ce type de facteur peut être appliqué à un groupement logique, par exemple (a b)^3 c.
  • La recherche par mots-clés est insensible à la casse et les accents et la ponctuation sont ignorés.
  • Les terminaisons des mots sont amputées pour la plupart des champs, tels le titre, le résumé et les notes. L’amputation des terminaisons vous évite d’avoir à prévoir toutes les formes possibles d’un mot dans vos recherches. Ainsi, les termes municipal, municipale et municipaux, par exemple, donneront tous le même résultat. L’amputation des terminaisons n’est pas appliquée au texte des champs de noms, tels auteurs/contributeurs, éditeur, publication.

Explorer

Cette section vous permet d’explorer les catégories associées aux références.

  • Les catégories peuvent servir à affiner votre recherche. Cochez une catégorie pour l’ajouter à vos critères de recherche. Les résultats seront alors restreints aux références qui sont associées à cette catégorie.
  • Dé-cochez une catégorie pour la retirer de vos critères de recherche et élargir votre recherche.
  • Les nombres affichés à côté des catégories indiquent combien de références sont associées à chaque catégorie considérant les résultats de recherche courants. Ces nombres varieront en fonction de vos critères de recherche, de manière à toujours décrire le jeu de résultats courant. De même, des catégories et des facettes entières pourront disparaître lorsque les résultats de recherche ne contiennent aucune référence leur étant associées.
  • Une icône de flèche () apparaissant à côté d’une catégorie indique que des sous-catégories sont disponibles. Vous pouvez appuyer sur l’icône pour faire afficher la liste de ces catégories plus spécifiques. Par la suite, vous pouvez appuyer à nouveau pour masquer la liste. L’action d’afficher ou de masquer les sous-catégories ne modifie pas vos critères de recherche; ceci vous permet de rapidement explorer l’arborescence des catégories, si désiré.

Résultats

Cette section présente les résultats de recherche. Si aucun critère de recherche n’a été fourni, elle montre toute la bibliographie (jusqu’à 20 références par page).

  • Chaque référence de la liste des résultats est un hyperlien vers sa notice bibliographique complète. À partir de la notice, vous pouvez continuer à explorer les résultats de recherche en naviguant vers les notices précédentes ou suivantes de vos résultats de recherche, ou encore retourner à la liste des résultats.
  • Des hyperliens supplémentaires, tels que Consulter le document ou Consulter sur [nom d’un site web], peuvent apparaître sous un résultat de recherche. Ces liens vous fournissent un accès rapide à la ressource, des liens que vous trouverez également dans la notice bibliographique.
  • Le bouton Résumés vous permet d’activer ou de désactiver l’affichage des résumés dans la liste des résultats de recherche. Toutefois, activer l’affichage des résumés n’aura aucun effet sur les résultats pour lesquels aucun résumé n’est disponible.
  • Diverses options sont fournies pour permettre de contrôler l’ordonnancement les résultats de recherche. L’une d’elles est l’option de tri par Pertinence, qui classe les résultats du plus pertinent au moins pertinent. Le score utilisé à cette fin prend en compte la fréquence des mots ainsi que les champs dans lesquels ils apparaissent. Par exemple, si un terme recherché apparaît fréquemment dans une référence ou est l’un d’un très petit nombre de termes utilisé dans cette référence, cette référence aura probablement un score plus élevé qu’une autre où le terme apparaît moins fréquemment ou qui contient un très grand nombre de mots. De même, le score sera plus élevé si un terme est rare dans l’ensemble de la bibliographie que s’il est très commun. De plus, si un terme de recherche apparaît par exemple dans le titre d’une référence, le score de cette référence sera plus élevé que s’il apparaissait dans un champ moins important tel le résumé.
  • Le tri par Pertinence n’est disponible qu’après avoir soumis des mots-clés par le biais de la section Rechercher.
  • Les catégories sélectionnées dans la section Explorer n’ont aucun effet sur le tri par pertinence. Elles ne font que filtrer la liste des résultats.
Dans les auteurs ou contributeurs
  • "Peng, Changhui"

Résultats 437 ressources

PertinenceDate décroissanteDate croissanteAuteur A-ZAuteur Z-ATitre A-ZTitre Z-A
  • 1
  • ...
  • 9
  • 10
  • 11
  • 12
  • 13
  • ...
  • 22
  • Page 11 de 22
Résumés
  • Li, M., Peng, C., Zhu, Q., Zhou, X., Yang, G., Song, X., & Zhang, K. (2020). The significant contribution of lake depth in regulating global lake diffusive methane emissions. Water Research, 172, 115465. https://doi.org/10.1016/j.watres.2020.115465
    Consulter sur linkinghub.elsevier.com
  • Li, H., Ding, J., Zhang, J., Yang, Z., Yang, B., Zhu, Q., & Peng, C. (2020). Effects of Land Cover Changes on Net Primary Productivity in the Terrestrial Ecosystems of China from 2001 to 2012. Land, 9(12), 480. https://doi.org/10.3390/land9120480

    The 2001–2012 MODIS MCD12Q1 land cover data and MOD17A3 NPP data were used to calculate changes in land cover in China and annual changes in net primary productivity (NPP) during a 12-year period and to quantitatively analyze the effects of land cover change on the NPP of China’s terrestrial ecosystems. The results revealed that during the study period, no changes in land cover type occurred in 7447.31 thousand km2 of China, while the area of vegetation cover increased by 160.97 thousand km2 in the rest of the country. Forest cover increased to 20.91%, which was mainly due to the conversion of large areas of savanna (345.19 thousand km2) and cropland (178.96 thousand km2) to forest. During the 12-year study period, the annual mean NPP of China was 2.70 PgC and increased by 0.25 PgC, from 2.50 to 2.75 PgC. Of this change, 0.21 PgC occurred in areas where there was no land cover change, while 0.04 PgC occurred in areas where there was land cover change. The contributions of forest and cropland to NPP exhibited increasing trends, while the contributions of shrubland and grassland to NPP decreased. Among these land cover types, the contributions of forest and cropland to the national NPP were the greatest, accounting for 40.97% and 27.95%, respectively, of the annual total NPP. There was no significant correlation between changes in forest area and changes in total annual NPP (R2 < 0.1), while the correlation coefficient for changes in cropland area and total annual NPP was 0.48. Additionally, the area of cropland converted to other land cover types was negatively correlated with the changes in NPP, and the loss of cropland caused a reduction in the national NPP.

    Consulter sur www.mdpi.com
  • Liu, C., Zhou, X., Lei, X., Huang, H., Zhou, C., Peng, C., & Wang, X. (2019). Separating Regressions for Model Fitting to Reduce the Uncertainty in Forest Volume-Biomass Relationship. Forests, 10(8), 658. https://doi.org/10.3390/f10080658

    The method of forest biomass estimation based on a relationship between the volume and biomass has been applied conventionally for estimating stand above- and below-ground biomass (SABB, t ha−1) from mean growing stock volume (m3 ha−1). However, few studies have reported on the diagnosis of the volume-SABB equations fitted using field data. This paper addresses how to (i) check parameters of the volume-SABB equations, and (ii) reduce the bias while building these equations. In our analysis, all equations were applied based on the measurements of plots (biomass or volume per hectare) rather than individual trees. The volume-SABB equation is re-expressed by two Parametric Equations (PEs) for separating regressions. Stem biomass is an intermediate variable (parametric variable) in the PEs, of which one is established by regressing the relationship between stem biomass and volume, and the other is created by regressing the allometric relationship of stem biomass and SABB. A graphical analysis of the PEs proposes a concept of “restricted zone,” which helps to diagnose parameters of the volume-SABB equations in regression analyses of field data. The sampling simulations were performed using pseudo data (artificially generated in order to test a model) for the model test. Both analyses of the regression and simulation demonstrate that the wood density impacts the parameters more than the allometric relationship does. This paper presents an applicable method for testing the field data using reasonable wood densities, restricting the error in field data processing based on limited field plots, and achieving a better understanding of the uncertainty in building those equations.

    Consulter sur www.mdpi.com
  • Li, M., Peng, C., Zhou, X., Yang, Y., Guo, Y., Shi, G., & Zhu, Q. (2019). Modeling Global Riverine DOC Flux Dynamics From 1951 to 2015. Journal of Advances in Modeling Earth Systems, 11(2), 514–530. https://doi.org/10.1029/2018MS001363

    Abstract Climate change has a profound impact on the global carbon cycle, including effects on riverine carbon pools, which connect terrestrial, oceanic, and atmospheric carbon pools. Until now, terrestrial ecosystem models have rarely incorporated riverine carbon components into global carbon budgets. Here we developed a new process‐based model, TRIPLEX‐HYDRA (TRIPLEX‐hydrological routing algorithm), that considers the production, consumption, and transport processes of nonanthropogenic dissolved organic carbon (DOC) from soil to river ecosystems. After the parameter calibration, model results explained more than 50% of temporal variations in all but three rivers. Validation results suggested that DOC yield simulated by TRIPLEX‐HYDRA has a good fit ( R 2  = 0.61, n  = 71, p  < 0.001) with global river observations. And then, we applied this model for global rivers. We found that mean DOC yield of global river approximately 1.08 g C/m 2  year, where most high DOC yield appeared in the rivers from high northern or tropic regions. Furthermore, our results suggested that global riverine DOC flux appeared a significant decrease trend (average rate: 0.38 Pg C/year) from 1951 to 2015, although the variation patterns of DOC fluxes in global rivers are diverse. A decreasing trend in riverine DOC flux appeared in the middle and high northern latitude regions (30–90°N), which could be attributable to an increased flow path and DOC degradation during the transport process. Furthermore, increasing trend of DOC fluxes is found in rivers from tropical regions (30°S–30°N), which might be related to an increase in terrestrial organic carbon input. Many other rivers (e.g., Mississippi, Yangtze, and Lena rivers) experienced no significant changes under a changing environment. , Key Points Terrestrial ecosystem models rarely incorporate riverine DOC components into the global carbon cycle The TRIPLEX‐HYDRA model simulates the spatiotemporal variation in the DOC fluxes in global rivers The global riverine DOC flux simulated by the TRIPLEX‐HYDRA model has significantly decreased from 1951 to 2015

    Consulter sur agupubs.onlinelibrary.wiley.com
  • Zhao, S., Fang, J., Miao, S., Gu, B., Tao, S., Peng, C., & Tang, Z. (2005). The 7-Decade Degradation of a Large Freshwater Lake in Central Yangtze River, China. Environmental Science & Technology, 39(2), 431–436. https://doi.org/10.1021/es0490875
    Consulter sur pubs.acs.org
  • Peng, Y., Fornara, D. A., Yue, K., Peng, X., Peng, C., Wu, Q., Ni, X., Liao, S., Yang, Y., Wu, F., & Peñuelas, J. (2022). Globally limited individual and combined effects of multiple global change factors on allometric biomass partitioning. Global Ecology and Biogeography, 31(3), 454–469. https://doi.org/10.1111/geb.13438

    Abstract Aim Plant biomass allocation reflects the distribution of photosynthates among different organs in response to changing environmental conditions. Global change influences plant growth across terrestrial ecosystems, but impacts of individual and combined multiple global change factors (GCFs) on plant biomass allocation at the global scale are unclear. Location Global. Time period Contemporary. Major taxa studied Plants in terrestrial ecosystems. Methods We conducted a meta‐analysis of data comprising 4,180 pairwise observations to assess individual and combined effects of nitrogen addition (N), warming (W), elevated CO 2 (C), irrigation (I), and drought (D) on plant biomass allocation based on the ‘ratio‐based optimal partitioning’ and ‘isometric allocation’ hypotheses. Results We found that (a) ratio‐based plant biomass fractions of different organs were only minimally affected by individual and combined effects of the studied GCFs; (b) combined effects of two‐factor pairs of GCFs on plant biomass allocation were commonly additive, rather than synergistic or antagonistic; (c) moderator variables influenced, but seldom changed the direction of individual and combined effects of GCFs on plant biomass allocation; and (d) neither individual nor combined effects of the studied GCFs altered allometric relationships among different organs, indicating that patterns of plant biomass allocation under the environmental stress conditions exerted by the multiple GCFs were better explained by the isometric allocation rather than the ratio‐based optimal partitioning hypothesis. Main conclusions Our results show consistent patterns of allometric plant biomass partitioning under effects of multiple GCFs and provide evidence of an isometric plant biomass allocation trajectory in response to global change perturbations. These findings improve our understanding and prediction of terrestrial vegetation responses to future global change scenarios.

    Consulter sur onlinelibrary.wiley.com
  • Gu, B., Chang, J., Min, Y., Ge, Y., Zhu, Q., Galloway, J. N., & Peng, C. (2013). The role of industrial nitrogen in the global nitrogen biogeochemical cycle. Scientific Reports, 3(1), 2579. https://doi.org/10.1038/srep02579
    Consulter sur www.nature.com
  • Song, X. Z., Zhang, H. L., Chang, S. X., Jiang, H., Peng, C. H., & Yu, S. Q. (2012). Elevated UV-B radiation increased the decomposition of Cinnamomum camphora and Cyclobalanopsis glauca leaf litter in subtropical China. Journal of Soils and Sediments, 12(3), 307–311. https://doi.org/10.1007/s11368-011-0451-3
    Consulter sur link.springer.com
  • Wang, W., Peng, C., Zhang, S. Y., Zhou, X., Larocque, G. R., Kneeshaw, D. D., & Lei, X. (2011). Development of TRIPLEX-Management model for simulating the response of forest growth to pre-commercial thinning. Ecological Modelling, 222(14), 2249–2261. https://doi.org/10.1016/j.ecolmodel.2010.09.019
    Consulter sur linkinghub.elsevier.com
  • Liu, D., Ge, Y., Chang, J., Peng, C., Gu, B., Chan, G. Y., & Wu, X. (2009). Constructed wetlands in China: recent developments and future challenges. Frontiers in Ecology and the Environment, 7(5), 261–268. https://doi.org/10.1890/070110

    Constructed wetlands (CWs) are an emerging, environmentally friendly engineering system employed in China. They require lower investment and operation costs while providing higher treatment efficiency and more ecosystem services than conventional wastewater treatment methods. Introduced to China in 1987, CW systems used for wastewater treatment have rapidly increased in number, particularly since the late 1990s. This review summarizes the state‐of‐the‐art application of CW systems for water pollution treatment by reviewing the basics of the technology and its historical development and performance efficiency. Current progress, limitations, future concerns, and the challenges of CW technologies are also discussed. Also highlighted is the need for sufficient and appropriate data to assist in the further development of CW systems and the implementation of integrated “bottom‐up” and “top‐down” approaches by both the public in general and government bodies in particular.

    Consulter sur esajournals.onlinelibrary.wiley.com
  • Yang, B., Peng, C., Harrison, S. P., Wei, H., Wang, H., Zhu, Q., & Wang, M. (2018). Allocation Mechanisms of Non-Structural Carbohydrates of Robinia pseudoacacia L. Seedlings in Response to Drought and Waterlogging. Forests, 9(12), 754. https://doi.org/10.3390/f9120754

    Climate change is likely to lead to an increased frequency of droughts and floods, both of which are implicated in large-scale carbon allocation and tree mortality worldwide. Non-structural carbohydrates (NSCs) play an important role in tree survival under stress, but how NSC allocation changes in response to drought or waterlogging is still unclear. We measured soluble sugars (SS) and starch in leaves, twigs, stems and roots of Robinia pseudoacacia L. seedlings that had been subjected to a gradient in soil water availability from extreme drought to waterlogged conditions for a period of 30 days. Starch concentrations decreased and SS concentrations increased in tissues of R. pseudoacacia seedlings, such that the ratio of SS to starch showed a progressive increase under both drought and waterlogging stress. The strength of the response is asymmetric, with the largest increase occurring under extreme drought. While the increase in SS concentration in response to extreme drought is the largest in roots, the increase in the ratio of SS to starch is the largest in leaves. Individual components of SS showed different responses to drought and waterlogging across tissues: glucose concentrations increased significantly with drought in all tissues but showed little response to waterlogging in twigs and stems; sucrose and fructose concentrations showed marked increases in leaves and roots in response to drought but a greater response to drought and waterlogging in stems and twigs. These changes are broadly compatible with the roles of individual SS under conditions of water stress. While it is important to consider the role of NSC in buffering trees against mortality under stress, modelling this behaviour is unlikely to be successful unless it accounts for different responses within organs and the type of stress involved.

    Consulter sur www.mdpi.com
  • Wang, H., Prentice, I. C., Davis, T. W., Keenan, T. F., Wright, I. J., & Peng, C. (2017). Photosynthetic responses to altitude: an explanation based on optimality principles. New Phytologist, 213(3), 976–982. https://doi.org/10.1111/nph.14332
    Consulter sur nph.onlinelibrary.wiley.com
  • Li, W., Peng, C., Zhou, X., Sun, J., Zhu, Q., Wu, H., & St-Onge, B. (2015). Application of the ecosystem model and Markov Chain Monte Carlo for parameter estimation and productivity prediction. Ecosphere, 6(12), 1–15. https://doi.org/10.1890/ES15-00034.1

    It is increasingly being recognized that global ecological research requires novel methods and strategies in which to combine process‐based ecological models and data in cohesive, systematic ways. In process‐based model applications, inherent spatial and temporal heterogeneities found within terrestrial ecosystems may lead to the uncertainties of model predictions. To reduce simulation uncertainties due to inaccurate model parameters, the Markov Chain Monte Carlo (MCMC) method was applied in this study to improve the estimations of four key parameters used in the process‐based ecosystem model of TRIPLEX‐FLUX. These four key parameters include a maximum photosynthetic carboxylation rate of 25°C (Vmax), an electron transport (Jmax) light‐saturated rate within the photosynthetic carbon reduction cycle of leaves, a coefficient of stomatal conductance (m), and a reference respiration rate of 10°C (R10). Seven forest flux tower sites located across North America were used to investigate and facilitate understanding of the daily variation in model parameters for three deciduous forests, three evergreen temperate forests, and one evergreen boreal forest. Eddy covariance CO 2 exchange measurements were assimilated to optimize the parameters in the year 2006. After parameter optimization and adjustment took place, net ecosystem production prediction significantly improved (by approximately 25%) compared to the CO 2 flux measurements taken at the seven forest ecosystem sites. Results suggest that greater seasonal variability occurs in broadleaf forests in respect to the selected parameters than in needleleaf forests. This study also demonstrated that the model‐data fusion approach by incorporating MCMC method is able to better estimate parameters and improve simulation accuracy for different ecosystems located across North America.

    Consulter sur esajournals.onlinelibrary.wiley.com
  • Deng, L., Huang, C., Kim, D., Shangguan, Z., Wang, K., Song, X., & Peng, C. (2020). Soil GHG fluxes are altered by N deposition: New data indicate lower N stimulation of the N2 O flux and greater stimulation of the calculated C pools. Global Change Biology, 26(4), 2613–2629. https://doi.org/10.1111/gcb.14970

    Abstract The effects of nitrogen (N) deposition on soil organic carbon (C) and greenhouse gas (GHG) emissions in terrestrial ecosystems are the main drivers affecting GHG budgets under global climate change. Although many studies have been conducted on this topic, we still have little understanding of how N deposition affects soil C pools and GHG budgets at the global scale. We synthesized a comprehensive dataset of 275 sites from multiple terrestrial ecosystems around the world and quantified the responses of the global soil C pool and GHG fluxes induced by N enrichment. The results showed that the soil organic C concentration and the soil CO 2 , CH 4 and N 2 O emissions increased by an average of 3.7%, 0.3%, 24.3% and 91.3% under N enrichment, respectively, and that the soil CH 4 uptake decreased by 6.0%. Furthermore, the percentage increase in N 2 O emissions (91.3%) was two times lower than that (215%) reported by Liu and Greaver ( Ecology Letters , 2009, 12:1103–1117). There was also greater stimulation of soil C pools (15.70 kg C ha −1  year −1 per kg N ha −1  year −1 ) than previously reported under N deposition globally. The global N deposition results showed that croplands were the largest GHG sources (calculated as CO 2 equivalents), followed by wetlands. However, forests and grasslands were two important GHG sinks. Globally, N deposition increased the terrestrial soil C sink by 6.34 Pg CO 2 /year. It also increased net soil GHG emissions by 10.20 Pg CO 2 ‐Geq (CO 2 equivalents)/year. Therefore, N deposition not only increased the size of the soil C pool but also increased global GHG emissions, as calculated by the global warming potential approach.

    Consulter sur onlinelibrary.wiley.com
  • Liu, Z., Peng, C., De Grandpré, L., Candau, J., Work, T., Zhou, X., & Kneeshaw, D. (2020). Aerial spraying of bacterial insecticides to control spruce budworm defoliation leads to reduced carbon losses. Ecosphere, 11(1), e02988. https://doi.org/10.1002/ecs2.2988

    Abstract Spruce budworm (SBW) outbreaks are a major natural disturbance in boreal forests of eastern North America. During large‐scale infestations, aerial spraying of bacterial insecticides is used to suppress local high‐density SBW populations. While the primary goal of spraying is the protection of wood volume for later harvest, it should also maintain carbon stored in trees. This study provides the first quantitative analysis of the efficacy of aerial spraying against SBW on carbon dynamics in balsam fir, spruce, and mixed fir–spruce forests. In this study, we used the TRIPLEX‐Insect model to simulate carbon dynamics with and without spray applications in 14 sites of the boreal forest located in various regions of Québec. We found that the efficacy of aerial spraying on reducing annual defoliation was greater in the early stage (<5 yr since the outbreak began) of the outbreak than in later (5–10 yr since the outbreak began) stage. Our results showed that more net ecosystem productivity is maintained in balsam fir (the most vulnerable species) than in either spruce or mixed fir–spruce forests following spraying. Also, average losses in aboveground biomass due to the SBW following spraying occurred more slowly than without spraying in balsam fir forests. Our findings suggest that aerial spraying could be used to maintain carbon in conifer forests during SBW disturbances, but that the efficacy of spray programs is affected by host species and stage of the SBW outbreak.

    Consulter sur esajournals.onlinelibrary.wiley.com
  • Duan, M., Li, A., Wu, Y., Zhao, Z., Peng, C., DeLuca, T. H., & Sun, S. (2019). Differences of soil CO2 flux in two contrasting subalpine ecosystems on the eastern edge of the Qinghai-Tibetan Plateau: A four-year study. Atmospheric Environment, 198, 166–174. https://doi.org/10.1016/j.atmosenv.2018.10.067
    Consulter sur linkinghub.elsevier.com
  • Wang, M., Tian, J., Bu, Z., Lamit, L. J., Chen, H., Zhu, Q., & Peng, C. (2019). Structural and functional differentiation of the microbial community in the surface and subsurface peat of two minerotrophic fens in China. Plant and Soil, 437(1–2), 21–40. https://doi.org/10.1007/s11104-019-03962-w
    Consulter sur link.springer.com
  • Liu, Z., Peng, C., De Grandpré, L., Candau, J.-N., Work, T., Huang, C., & Kneeshaw, D. (2019). Simulation and Analysis of the Effect of a Spruce Budworm Outbreak on Carbon Dynamics in Boreal Forests of Quebec. Ecosystems, 22(8), 1838–1851. https://doi.org/10.1007/s10021-019-00377-7
    Consulter sur link.springer.com
  • Yang, M., Zhou, X., Liu, Z., Li, P., Liu, C., Huang, H., Tang, J., Zhang, C., Zou, Z., Xie, B., & Peng, C. (2024). Dynamic carbon allocation trade‐off: A robust approach to model tree biomass allometry. Methods in Ecology and Evolution, 15(5), 886–899. https://doi.org/10.1111/2041-210X.14315

    Abstract Forest above‐ground biomass (AGB) is often estimated by converting the observed tree size using allometric scaling between the dry weight and size of an organism. However, the variations in biomass allocation and scaling between tree crowns and stems due to survival competition during a tree's lifecycle remain unclear. This knowledge gap can improve the understanding of modelling tree biomass allometry because traditional allometries ignore the dynamics of allocation. Herein, we characterised allometric scaling using the dynamic ratio ( r ) of the stem biomass (SB) to AGB and a dynamic exponent. The allometric models were biologically parameterised by the r values for initial, intermediate and final ages rather than only a regression result. The scaling was tested using field measurements of 421 species and 2213 different‐sized trees in pantropical regions worldwide. We found that the scaling fluctuated with tree size, and this fluctuation was driven by the trade‐off relationship of biomass allocation between the tree crown and stem depending on the dynamic crown trait. The allometric scaling between SB and AGB varied from 0.8 to 1.0 for a tree during its entire lifecycle. The fluctuations presented a general law for the allometric scaling of the pantropical tree biomass and size. Our model quantified the trade‐off and explained 94.1% of the allometric relationship between the SB and AGB (93.8% of which between D 2 H and AGB) for pantropical forests, which resulted in a better fit than that of the traditional model. Considering the effects of the trade‐off on modelling, the actual biomass of large trees could be substantially greater than conventional estimates. These results highlight the importance of coupling growth mechanisms in modelling allometry and provide a theoretical foundation for better describing and predicting forest carbon accumulation.

    Consulter sur besjournals.onlinelibrary.wiley.com
  • Zhao, M., Xiang, W., Tian, D., Deng, X., Huang, Z., Zhou, X., & Peng, C. (2013). Effects of Increased Nitrogen Deposition and Rotation Length on Long-Term Productivity of Cunninghamia lanceolata Plantation in Southern China. PLoS ONE, 8(2), e55376. https://doi.org/10.1371/journal.pone.0055376
    Consulter sur dx.plos.org
  • 1
  • ...
  • 9
  • 10
  • 11
  • 12
  • 13
  • ...
  • 22
  • Page 11 de 22
RIS

Format recommandé pour la plupart des logiciels de gestion de références bibliographiques

BibTeX

Format recommandé pour les logiciels spécialement conçus pour BibTeX

Flux web personnalisé
Dernière mise à jour depuis la base de données : 28/05/2025 05:00 (UTC)

Explorer

Auteur·e·s

  • Blanchet, Jean-Pierre (1)
  • Peng, Changhui (426)

Type de ressource

  • Article de colloque (1)
  • Article de revue (435)
  • Livre (1)

Année de publication

  • Entre 1900 et 1999 (6)
    • Entre 1990 et 1999 (6)
      • 1997 (1)
      • 1998 (2)
      • 1999 (3)
  • Entre 2000 et 2025 (431)
    • Entre 2000 et 2009 (51)
      • 2000 (3)
      • 2001 (3)
      • 2002 (7)
      • 2003 (3)
      • 2004 (2)
      • 2005 (3)
      • 2006 (5)
      • 2007 (7)
      • 2008 (8)
      • 2009 (10)
    • Entre 2010 et 2019 (218)
      • 2010 (6)
      • 2011 (26)
      • 2012 (14)
      • 2013 (22)
      • 2014 (27)
      • 2015 (13)
      • 2016 (23)
      • 2017 (18)
      • 2018 (27)
      • 2019 (42)
    • Entre 2020 et 2025 (162)
      • 2020 (31)
      • 2021 (42)
      • 2022 (34)
      • 2023 (35)
      • 2024 (20)

Explorer

UQAM - Université du Québec à Montréal

  • Centre pour l’étude et la simulation du climat à l’échelle régionale (ESCER)
  • bibliotheques@uqam.ca

Accessibilité Web