Results 221 to 230 of about 2,154 (259)
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Climate and leaf phenology controls on tropical forest photosynthesis
2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2016Discerning photosynthetic seasonality in tropical forests is fundamental to both basic ecology (plant strategies for resource acquisition when resources are limiting) and the need to understand vegetation responses and feedbacks to a changing climate.
Alfredo Huete +3 more
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Seasonal patterns of leaf H2O2 content: reflections of leaf phenology, or environmental stress?
Functional Plant Biology, 2009H2O2 is an ubiquitous compound involved in signalling, metabolic control, stress responses and development. The compatibility of leaf tissue levels with these functions has, however, often been questioned. The objective here is to document H2O2 levels and variability under natural conditions, and their underlying causes. Using the FOX method, bulk H2O2
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Leaf Phenology and Leaf Damage of Saplings in the Luquillo Experimental Forest, Puerto Rico1
Biotropica, 2000ABSTRACTChanges in light or water availability can result in synchronous leaf production, concentrating food availability for herbivores of young leaves to only a few months. To determine the importance of food availability on herbivory, leaf phenology and leaf damage were studied in the Luquillo Experimental Forest (LEF) of Puerto Rico.
Pilar Angulo-Sandoval, T. Mitchell Aide
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Leaf phenology and carbon dynamics in six leguminous trees
African Journal of Ecology, 2007AbstractI documented photosynthetic rates and seasonal stem total nonstructural carbohydrates (TNC) in six leguminous tree species Burkea africana, Baikiaea plurijuga, Erythrophleum africanum, Guibourtia coleosperma, Julbernardia globiflora and Pterocarpus angolensis exhibiting a range of leaf phenological patterns.
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Leaf phenology in relation to canopy closure in southern Appalachian trees
American Journal of Botany, 2008Leaf phenology varies markedly across tree species of temperate deciduous forests. Early leafing in spring may increase light capture and carbon gain prior to canopy closure, allowing saplings to survive in understory sites deeply shaded in midsummer.
Lopez, Omar R. +3 more
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Responses of rubber leaf phenology to climatic variations in Southwest China
International Journal of Biometeorology, 2017The phenology of rubber trees (Hevea brasiliensis) could be influenced by meteorological factors and exhibits significant changes under different geoclimates. In the sub-optimal environment in Xishuangbanna, rubber trees undergo lengthy periods of defoliation and refoliation.
De-Li, Zhai +4 more
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Leaf Phenology of Trees in the Pasoh Forest Reserve
2003We studied the phenology of leaf emergence in 94 trees and the leaf dynamics of 17 selected trees in the Pasoh Forest Reserve (Pasoh FR), Malaysia. We tested the following hypotheses: (i) the phenology of leaf emergence differs among trees of different heights because of differences in the relative importance of meteorological factors, and (ii) the ...
Noriyuki Osada +4 more
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POPULATION STRUCTURE IN ZAMIA DEBILIS (ZAMIACEAE) I. SIZE CLASSES, LEAF PHENOLOGY, AND LEAF TURNOVER
American Journal of Botany, 1989Population structure, leaf phenology and leaf turnover were followed over a 29‐month period in Zamia debilis L.f. ex Aiton (Zamiaceae), an understory species in the Cambalache Forest in northern Puerto Rico. It was not possible to determine plant age or to measure the subterranean stems; size classes based on leaf number and leaf × leaflet number ...
Vivian Negrón‐Ortiz, Gary J. Breckon
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Characterizing Eucalypt Leaf Phenology and Stress with Spectral Analysis
2009Detection of stress with remote sensing in any vegetation type relies on development of methods that highlight properties associated with stress which are discernable from background variation, such as phenological changes. Therefore the nature (and timing) of phenological foliar change needs to be systematically compared to foliar stress symptoms with
Karen Barry +3 more
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Journal of Horticultural Science, 1993
The seasonal patterns of vegetative and reproductive growth and leaf nutrient composition were investigated in four passionfruit orchards over two years in subtropical Queensland. Vegetative growth occurred all year round with major activity in September and October and least in November.
C. M. Menzel +3 more
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The seasonal patterns of vegetative and reproductive growth and leaf nutrient composition were investigated in four passionfruit orchards over two years in subtropical Queensland. Vegetative growth occurred all year round with major activity in September and October and least in November.
C. M. Menzel +3 more
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