Добірка наукової літератури з теми "Cambial phenology"
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Статті в журналах з теми "Cambial phenology"
Li, Peng, and W. T. Adams. "Genetic variation in cambial phenology of coastal Douglas-fir." Canadian Journal of Forest Research 24, no. 9 (September 1, 1994): 1864–70. http://dx.doi.org/10.1139/x94-240.
Повний текст джерелаRensing, K. H., and J. N. Owens. "Bud and cambial zone phenology of lateral branches from Douglas-fir (Pseudotsugamenziesii) seedlings." Canadian Journal of Forest Research 24, no. 2 (February 1, 1994): 286–96. http://dx.doi.org/10.1139/x94-041.
Повний текст джерелаMalik, Rayees, Sergio Rossi, and Raman Sukumar. "Cambial phenology in Abies pindrow (Pinaceae) along an altitudinal gradient in northwestern Himalaya." IAWA Journal 41, no. 2 (May 12, 2020): 186–201. http://dx.doi.org/10.1163/22941932-bja10007.
Повний текст джерелаZeng, Qiao, Afsheen Khan, Annie Deslauriers, and Sergio Rossi. "May Temperature Drives Cambial Resumption in the Boreal Black Spruce." Forests 13, no. 12 (December 17, 2022): 2168. http://dx.doi.org/10.3390/f13122168.
Повний текст джерелаRaiput, Kishore S., and K. S. Rao. "OCCURRENCE OF INTERCELLULAR SPACES IN CAMBIAL RAYS KISHORE S. RAJPUT." Israel Journal of Plant Sciences 46, no. 4 (May 13, 1998): 299–302. http://dx.doi.org/10.1080/07929978.1998.10676739.
Повний текст джерелаZiaco, Emanuele, Franco Biondi, Sergio Rossi, and Annie Deslauriers. "Environmental drivers of cambial phenology in Great Basin bristlecone pine." Tree Physiology 36, no. 7 (February 25, 2016): 818–31. http://dx.doi.org/10.1093/treephys/tpw006.
Повний текст джерелаDe Mil, Tom, Wannes Hubau, Bhély Angoboy Ilondea, Mirvia Angela Rocha Vargas, Pascal Boeckx, Kathy Steppe, Joris Van Acker, Hans Beeckman, and Jan Van den Bulcke. "Asynchronous leaf and cambial phenology in a tree species of the Congo Basin requires space–time conversion of wood traits." Annals of Botany 124, no. 2 (June 6, 2019): 245–53. http://dx.doi.org/10.1093/aob/mcz069.
Повний текст джерелаBurdon, Rowland D. "Shoot Phenology as a Driver or Modulator of Stem Diameter Growth and Wood Properties, with Special Reference to Pinus radiata." Forests 14, no. 3 (March 13, 2023): 570. http://dx.doi.org/10.3390/f14030570.
Повний текст джерелаGričar, Jožica, Andreja Vedenik, Gregor Skoberne, Polona Hafner, and Peter Prislan. "Timeline of Leaf and Cambial Phenology in Relation to Development of Initial Conduits in Xylem and Phloem in Three Coexisting Sub-Mediterranean Deciduous Tree Species." Forests 11, no. 10 (October 17, 2020): 1104. http://dx.doi.org/10.3390/f11101104.
Повний текст джерелаMil, Tom De. "Intra-annual to multi-decadal xylem traits in a tropical moist semi-deciduous forest of Central Africa." Afrika Focus 30, no. 1 (February 26, 2017): 136–40. http://dx.doi.org/10.1163/2031356x-03001010.
Повний текст джерелаДисертації з теми "Cambial phenology"
Parmeggiani, Rafaela Prosdocini [UNESP]. "Atividade cambial em ramos de Kielmeyera grandiflora (WAWRA) saddi (Callophylaceae) ocorrentes no cerrado paulista." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/134277.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
No cerrado, as estações são bem demarcadas pela sazonalidade pluvial, portanto, espera-se que haja uma sazonalidade na atividade do câmbio vascular. Kielmeyera grandiflora é considerada uma espécie modelo para estudos de atividade cambial em ramos, pois possui módulos de crescimento bem demarcados, formados por cicatrizes da gema terminal. Nosso objetivo foi de entender qual a relação entre a atividade cambial de Kielmeyera grandiflora (Wawra) Saddi (Calophyllaceae), os fatores ambientais e a fenologia e responder se a atividade cambial varia entre três módulos de crescimentos consecutivos. A área de estudo é um fragmento de cerrado em regeneração no município de Botucatu, estado de São Paulo, Brasil (S 22º53’11.0’’, W 48º29’17.3’’). Foram amostrados mensalmente os três últimos módulos de crescimento dos ramos de três indivíduos durante o período de fevereiro de 2012 a fevereiro de 2013. No mesmo período, a fenologia (brotação, folhas novas, folhas adultas, folhas senescentes e queda foliar) foram avaliadas. O material foi fixado em CRAF III para conservação do conteúdo celular. As amostras foram desidratadas em série alcoólica e incluídas em resina metacrilato para posterior corte em micrótomo rotativo. As análises foram feitas em fotomicroscópio de luz. Utilizamos Modelo Generalizado Linear Misto (GLMM) com erro Binomial para a variável resposta presença/ausência da atividade cambial e erro de Poisson para a variável resposta de contagem de paredes recém formadas. O início da atividade cambial, a brotação e o desenvolvimento de folhas novas ocorreram durante o mês de agosto no período seco. O período de atividade cambial sobrepôs-se à estação chuvosa, temperaturas elevadas e comprimento do dia entre 12 e 13,6 h. O câmbio vascular entrou em dormência em maio, mês que ainda chovia, contudo a temperatura e o comprimento do dia passavam por quedas acentuadas. A variação da atividade cambial entre os módulos de crescimento foi representativa somente no período de reativação cambial, mostrando que o módulo 1, mais próximo às fontes de auxina, apesar de ter iniciado atividade junto ao módulo 3, produziu em todo o período analisado, maior quantidade de células novas, possivelmente devido à ação de hormônios produzidos nos tecidos jovens e em desenvolvimento.
In the cerrado, the seasons are well marked by rain seasonality; therefore, there is a seasonality in the vascular cambium activity. Kielmeyera grandiflora is considered a model for branch cambial activity studies because it has well marked growth modules formed by terminal bud scars. Our goal was to understand what the relationship between cambial activity of Kielmeyera grandiflora (Wawra) Saddi (Calophyllaceae), environmental factors and the phenology and answear wheter cambial activity varies between three consecutive sections of internodal growth. The study area is a cerrado fragment in regeneration in the city of Botucatu, São Paulo State, Brazil (22° 53 ' S 11.0 '', W 48° 29 ' 17.3 ''). Were sampled on a monthly basis the last three modules of growth of branches of three individuals during the period between February 2012 to February 2013. The material was fixed in CRAF III for preservation of cell content. The samples were dehydrated in alcohol series and included in historesin for further cut in rotary microtome. Analyses were made on light microscope. We used Generalized Linear Mixed Model (GLMM) with Binomial error for the variable reply presence/absence of cambial activity and Poisson error for the variable count response of newly formed walls. The beginning of cambial activity, the sprouting and the development of new leaves occurred during the month of August in the dry period. The period of cambial activity overlapped the rainy season, high temperatures and day length between 12 and 13, 6 h. The vascular cambium dormancy was observed in May, a raining month; however, temperature and day length was decreasing. The variation of cambial activity between the internodal growth sections was representative just in reactivation period, showing that the younger internodal section, closest to the sources of auxin, has produced in the whole study period a larger number of new cells that the older, possibly due to the action of hormones produced in young and development tissues.
Lobão, Moisés Silveira. "Dendrocronologia, fenologia, atividade cambial e qualidade do lenho de árvores de Cedrela odorata L., Cedrela fissilis Vell. e Schizolobium parahyba var. amazonicum Hub. ex Ducke, no estado do Acre, Brasil." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-02082011-135003/.
Повний текст джерелаThe state of Acre has an eminently forest asset due the high natural timber species abundance in an ecosystem characterized by the biodiversity of tree tropical species. Researches in dendrochronology in this tropical region indicate that 35-50% of species form tree rings. Therefore, dendrochronology, a method based on tree ring analysis becomes important tool, providing data for long growth periods and accurate estimates of trees age, to understanding the forest dynamics and the development of sustainable forestry management. Thus, the objective of this research was to study some tree species of natural occurrence in Acre, verify influence of total amount and seasonal distribution of rainfall, temperature and evapotranspiration, and phenological aspects presented by each species in their growth in diameter and quality of timber produced. The study was conducted at three different sites, and in the Catuaba Experimental Reserve in three different microsites: primary forest, pasture and forest edge.The increase in the circumference the trunk was assessed monthly with a dendrometer and phenology was evaluated with visual observations in selected tree species. Samples were collected from wood in the DBH of the trunk for dendrochronological, X-ray densitometry and wood anatomy assessments. It was found that the phenology of the trees species is regulated by rainfall in the current month or previous months. It was observed that the formation of growth rings of trees of these species is regulated by evapotranspiration, and by phenophases of fall and sprouting new leaf during the year, indicating that these species have potential for paleoclimate studies. The analysis of Xray densitometry and anatomical of the wood allowed to separate portions of the juvenile and adult wood in radial section of the trunk. There were significant differences in the growth of the trunk of tress between species, sites and microsites. There is great potential for the use of dendrochronology combined with the use of permanent inventory plots to define cutting cycles for these species.
Prats, Llinàs Maria Teresa. "Phenological development in warmer temperatures and water stress during post-harvest affects Chardonnay grapevines (Vitis vinifera L.)." Doctoral thesis, Universitat de Lleida, 2019. http://hdl.handle.net/10803/667850.
Повний текст джерелаUna de las principales preocupaciones en la agricultura es la incertidumbre de los efectos del cambio climático. Por este motivo, el estudio y la adopción de nuevas técnicas de manejo de los cultivos y de la gestión del agua son elementos esenciales para garantizar la productividad de los cultivos. En la zona del mediterráneo, el viñedo (Vitis vinifera L.) representa uno de los cultivos más importantes, el cual se podría ver afectado especialmente en las zonas donde no hay disponibilidad de agua. Además, en los últimos años se ha observado un adelanto en la fenología de la viña, provocando que, entre otros, la fase de la post-vendimia esdevenga una fase crítica debido a su mayor duración y bajo unas condiciones más cálidas y con una menor pluviometría. Debido a que en los próximos años se prevé un incremento en la frecuencia e intensidad de los eventos de sequía, además de un aumento significativo de las temperaturas, los elementos críticos para combatir los efectos del cambio climático son: la disponibilidad de modelos fenológicos para predecir los patrones estacionales de las fases fenológicas; y la selección del momento más idóneo para la adopción de estrategias de riego deficitario, para el ahorro de agua y garantizar unos buenos rendimientos productivos de la vendimia con una composición de las bayas adecuada para la elaboración de vinos y cavas.
One of the main concerns in agriculture is the effect of climate change. As a result, studying the adoption of new management techniques and managing water use are essential for guaranteeing crop productivity. In the Mediterranean region, the grapevine (Vitis vinifera L.) is one of the most important crops affected by water availability, especially in areas without irrigation. Moreover, over the last years has been observed advancements in grapevine phenology, where the post-harvest period is becoming a critical stage due to their longer duration under warmer and dryer conditions. Due to the expected increases in the frequency and intensity of drought events and rising temperatures, the critical elements for combating the effects of climate change are: the availability of phenological models to predict seasonal patterns in the key phenological stages; and the selection of the most suitable moment at which to apply regulated deficit irrigation strategies. Their study is required to water savings and to guarantee good yields with the desired berry composition for wine and sparkling wine production.
Bórnez, Mejías Kevin. "Study of vegetation dynamics from satellite: phenological responses to climate change." Doctoral thesis, Universitat Autònoma de Barcelona, 2021. http://hdl.handle.net/10803/673693.
Повний текст джерелаLa fenología es clave para controlar los procesos fisicoquímicos y biológicos, especialmente el albedo, la rugosidad superficial, conductancia de las hojas, flujos de carbono, agua y energía. Por lo tanto, la estimación de la fenología es cada vez más importante para comprender los efectos del cambio climático en los ecosistemas y las interacciones biosfera-atmósfera. La teledetección es una herramienta útil para caracterizar la fenología, aunque no existe consenso sobre el tipo de sensor satelital y metodología óptimos para extraer métricas fenológicas. Los objetivos principales de mi investigación fueron (i) mejorar la estimación de la fenología vegetal a partir de datos satelitales, (ii) validar las estimaciones fenológicas con observaciones terrestres y teledetección cercana a la superficie, y (iii) comprender las relaciones entre las variables climáticas y la fenología en un contexto de cambio climático, así como evaluar las respuestas de la vegetación a eventos extremos. Estos objetivos se exploran en los siguientes tres capítulos de la tesis. En el capítulo 2, investigué la sensibilidad de la fenología a (I) la variable de vegetación: índice de vegetación NDVI, índice de área foliar (LAI), fracción de radiación fotosintéticamente activa absorbida (FAPAR) y fracción de cubierta vegetal (FCOVER); (II) el método de suavizado para derivar trayectorias estacionales; y (III) el método de estimación fenológica: umbrales, función logística, media móvil y primera derivada. El método basado en umbrales aplicado a la serie temporal Copernicus Global Land LAI V2 suavizada dio resultados óptimos al validarlos con observaciones terrestres, con errores cuadráticos medios de ~10 d y ~25 d para el inicio de estación fenológica y la senescencia respectivamente. En el tercer capítulo, utilicé medidas fenológicas continuas de PhenoCam y FLUXNET a alta resolución temporal (30 minutos). Esto permite una comparación más robusta y precisa con la fenología estimada a partir de satélite, evitando problemas relacionados con las diferencias en la definición de métricas fenológicas. Validé la fenología estimada a partir de series de tiempo de LAI con PhenoCam y FluxNet en 80 bosques caducifolios. Los resultados mostraron una fuerte correlación (R2 > 0,7) entre la fenología obtenida mediante teledetección y las observaciones terrestres para el inicio de estación y R2 > 0,5 para el final de estación. El método basado en umbrales funcionó mejor con un error cuadrático medio de ~9 d con PhenoCam y ~7 d con FLUXNET para el inicio de estación, y ~12 d y ~10 d, respectivamente, para la senescencia. En el cuarto capítulo, investigué los patrones espacio-temporales de la respuesta fenológica a las anomalías climáticas en el hemisferio norte utilizando la fenología estimada en el Capítulo 2 y validado en el Capítulo 2 y Capítulo 3, y conjuntos de datos climáticos de múltiples fuentes para 2000-2018 a resoluciones de 0.1°. También evalué el impacto de las olas de calor extremas y las sequías en la fenología. Los análisis de correlación parcial de las métricas fenológicas estimadas con satélite y las variables climáticas, indicaron que los cambios en la temperatura pre estacional tuvieron mayor influencia sobre las anomalías fenológicas que la precipitación: cuanto mayor es la temperatura, más temprano es el comienzo estacional en la mayoría de los bosques caducifolios (coeficiente de correlación medio de -0,31). Tanto la temperatura como la precipitación contribuyeron al avance y retraso del final de estación. Un atraso en la senescencia se correlacionó significativamente con un índice de precipitación-evapotranspiración estandarizado (SPEI) positivo (~ 30% de los bosques). El final e inicio de estación cambió >20 d en respuesta a la ola de calor en la mayor parte de Europa en 2003 y en los Estados Unidos de América en 2012.
Phenology is key to control physicochemical and biological processes, especially albedo, surface roughness, canopy conductance and fluxes of carbon, water and energy. High-quality retrieval of land surface phenology (LSP) is thus increasingly important for understanding the effects of climate change on ecosystem function and biosphere–atmosphere interactions. Remote sensing is a useful tool for characterizing LSP although no consensus exists on the optimal satellite dataset and the method to extract phenology metrics. I aimed to (i) improve the retrieval of Land Surface Phenology from satellite data, (ii) validate LSP with ground observations and near surface remote sensing, and (iii) understand the relationships between climate variables and phenology in a climate change context, as well as to assess the responses of vegetation to extreme events. These three main research objectives are explored in the three chapters of the thesis. In chapter 2, I investigated the sensitivity of phenology to (I) the input vegetation variable: normalized difference vegetation index (NDVI), leaf area index (LAI), fraction of absorbed photosynthetically active radiation (FAPAR), and fraction of vegetation cover (FCOVER); (II) the smoothing and gap filling method for deriving seasonal trajectories; and (III) the phenological extraction method: threshold, logistic-function, moving-average and first derivative based approaches. The threshold-based method applied to the smoothed and gap-filled Copernicus Global Land LAI V2 time series agreed the best with the ground phenology, with root mean square errors of ~10 d and ~25 d for the timing of the start of the season (SoS) and the end of the season (EoS), respectively. In the third chapter, I took advantage of PhenoCam and FLUXNET capability of continuous monitoring of vegetation seasonal growth at very high temporal resolution (every 30 minutes). This allows a more robust and accurate comparison with LSP derived from satellite time series avoiding problems related to the differences in the definition of phenology metrics. I validated LSP estimated from LAI time series with near-surface PhenoCam and eddy covariance FLUXNET data over 80 sites of deciduous broadleaf forest. Results showed a strong correlation (R2 > 0.7) between the satellite LSP and ground-based observations from both PhenoCam and FLUXNET for the timing of the start (SoS) and R2 > 0.5 for the end of season (EoS). The threshold-based method performed the best with a root mean square error of ~9 d with PhenoCam and ~7 d with FLUXNET for the timing of SoS, and ~12 d and ~10 d, respectively, for the timing of EoS. In the fourth chapter, I investigated the spatio-temporal patterns of the response of deciduous forests to climatic anomalies in the Northern Hemisphere using LSP derived in Chapter 1 and validated in Chapter 1 and Chapter 2, and multi-source climatic data sets for 2000–2018 at resolutions of 0.1°. I also assessed the impact of extreme heatwaves and droughts on deciduous forest phenology. Analyses of partial correlations of phenological metrics with the timing of the start of the season (SoS), end of the season (EoS), and climatic variables indicated that changes in preseason temperature played a stronger role than precipitation in the interannual variability of SoS anomalies: the higher the temperature, the earlier the SoS in most deciduous forests in the Northern Hemisphere (mean correlation coefficient of -0.31). Both temperature and precipitation contributed to the advance and delay of EoS. A later EoS was significantly correlated with a positive standardized precipitation-evapotranspiration index (SPEI) at the regional scale (~30% of deciduous forests). The timings of EoS and SoS shifted by >20 d in response to heat waves throughout most of Europe in 2003 and in the United States of America in 2012.
Universitat Autònoma de Barcelona. Programa de Doctorat en Ecologia Terrestre
Gauchat, Funes Drewes María elena. "Phenologie de la formation du bois chez le Mélèze : un pas vers une meilleure compréhension de la formation du bois par rapport à climat." Phd thesis, AgroParisTech, 2011. http://pastel.archives-ouvertes.fr/pastel-00741764.
Повний текст джерелаGauchat, Funes Drewes María Elena. "Phenologie de la formation du bois chez le Mélèze : un pas vers une meilleure compréhension de la formation du bois par rapport à climat." Thesis, Paris, AgroParisTech, 2011. http://www.theses.fr/2011AGPT0037/document.
Повний текст джерелаLarix is a genus of high interest for plantation due to its fast growth rate and appreciated wood quality. Larch has a great potential to be introduced in middle and lowland afforestations as an alternative to Douglas-fir. One important question for breeders is adaptation to environment. It is particularly relevant in the context of climatic changes where a strong decrease of soil water availability during the growth period is predicted. Three larch species are used by foresters in France for plantation establishment, for which breeders must supply more adapted material: European and Japanese larch and their interspecific hybrid. The higher performance of hybrid larch in afforestations demonstrates its great potential. The tissue structure of annual rings reflects the response of cambium (cell division, elongation and thickening of cell walls) to environmental factors (climate, soil fertility, competition, etc), as well as physiological states and genetics. Then, wood density can be interpreted as the result of cambial activity and its variation as the response of the tree to environment. However, to gain a better understanding of this response and of the variation of the xylogenesis process itself, it is important to spot the timing of wood cell production. There are different approaches to study the timing of wood formation. We used a combination of wood microdensitometry and of pinning method as a new approach to study the dynamic of wood formation from a tree improvement point of view. This new approach allowed us to go beyond the static character of the microdensity profile (where density variation is related to distance) and to transform it into a dynamic profile (where density variation is related to time). Variation in phenology of cambial activity can be seen as a mechanism better adjusting trees to their environment. If this adjustment improves fitness, then the corresponding tree anatomical response to environment variation may be seen as an adaptive response. As breeders, our interest is twice: on one side, a better understanding of cambial phenology and of wood formation in relation to pedo-climatic factors and climatic stress is urgent for profiling genotypes better fitted to their environment. On the other side, exploitation design trees with better wood properties. In larch, phenotypic variation of variables through breeding of knowledge about phenology of wood formation will help to related to the dates of initiation and completion of the formation of different tissues and to the total duration of ring formation is low. Last and final summary in the thesis
Li, Peng. "Genetic variation in phenology of bud and cambial activity in coastal Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) /." 1990. http://hdl.handle.net/1957/10955.
Повний текст джерелаКниги з теми "Cambial phenology"
Li, Peng. Genetic variation in phenology of bud and cambial activity in coastal Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco). 1990.
Знайти повний текст джерелаЧастини книг з теми "Cambial phenology"
Kagawa, Akira, and Giovanna Battipaglia. "Post-photosynthetic Carbon, Oxygen and Hydrogen Isotope Signal Transfer to Tree Rings—How Timing of Cell Formations and Turnover of Stored Carbohydrates Affect Intra-annual Isotope Variations." In Stable Isotopes in Tree Rings, 429–62. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92698-4_15.
Повний текст джерелаKagawa, Akira, and Giovanna Battipaglia. "Post-photosynthetic Carbon, Oxygen and Hydrogen Isotope Signal Transfer to Tree Rings—How Timing of Cell Formations and Turnover of Stored Carbohydrates Affect Intra-annual Isotope Variations." In Stable Isotopes in Tree Rings, 429–62. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92698-4_15.
Повний текст джерелаKlisz, Marcin, Debojyoti Chakraborty, Branislav Cvjetković, Michael Grabner, Anna Lintunen, Konrad Mayer, Jan-Peter George, and Sergio Rossi. "Functional Traits of Boreal Species and Adaptation to Local Conditions." In Advances in Global Change Research, 323–55. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-15988-6_12.
Повний текст джерела