Journal ArticleDOI
Climatic Periodicity, Phenology, and Cambium Activity in Tropical Dry Forest Trees
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TLDR
Phenology and cambium growth are progressively uncoupled from climatic seasonality in brevideciduous and evergreen trees growing at microsites with large soil water reserves which buffer trees against seasonal drought and thus may prevent the formation of distinct annual rings.Abstract:
The seasonal time course of vegetative phenology and cambium growth is compared for tree species from Central America and Asia growing in tropical climates with a long, severe dry season. Although the inhibition of plant growth by water stress is weH established, responses to seasonal drought vary widely among such trees, and their annual development is not weH synchronized by climatic seasonality. In deciduous trees growing at microsites with low soil moisture storage, phenology and cambium growth are weH correlated with each other and with seasonal rainfall, and most trees have distinct annual rings. Phenology and cambium growth are progressively uncoupled from climatic seasonality in brevideciduous and evergreen trees growing at microsites with large soil water reserves which buffer trees against seasonal drought and thus may prevent the formation of distinct annual rings. There is some experimental evidence conceming the control of growth initiation in apical meristems and the cambium, but little is known about the mechanisms which arrest growth and deterrnine qualitative changes in organ development and cambium cell differentiation.read more
Citations
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High-resolution palaeoclimatology of the last millennium: a review of current status and future prospects:
Philip Jones,Keith R. Briffa,Timothy J. Osborn,Janice M. Lough,T. D. van Ommen,Bo Møllesøe Vinther,Jürg Luterbacher,Eugene R. Wahl,Francis W. Zwiers,Michael E. Mann,Gavin A. Schmidt,Caspar M. Ammann,Brendan M. Buckley,Kim M. Cobb,Jan Esper,Hugues Goosse,Nicholas E. Graham,Eystein Jansen,Thorsten Kiefer,C. Kull,Marcel Küttel,Ellen Mosley-Thompson,Jonathan T. Overpeck,Nadja Riedwyl,Michael Schulz,Alexander W. Tudhope,Ricardo Villalba,Heinz Wanner,Eric W. Wolff,Elena Xoplaki +29 more
TL;DR: A review of late-Holocene palaeoclimaoclimatology represents the results from a PAGES/CLIVAR Intersection Panel meeting that took place in June 2006 as mentioned in this paper, emphasizing current issues in their use for climate reconstruction; various approaches that have been adopted to combine multiple climate proxy records to provide estimates of past annual-to-decadal timescale Northern Hemisphere surface temperatures and other climate variables, such as large-scale circulation indices; and the forcing histories used in climate model simulations of the past millennium.
Journal ArticleDOI
Changes in rainfall seasonality in the tropics
TL;DR: In this paper, a new global measure of precipitation seasonality is proposed, and application of this method to observations from the tropics shows that increases in variability were accompanied by shifts in seasonal magnitude, timing and duration.
Changes in rainfall seasonality in the tropics
TL;DR: In this article, a new global measure of precipitation seasonality is proposed, and application of this method to observations from the tropics shows that increases in variability were accompanied by shifts in seasonal magnitude, timing and duration.
Journal ArticleDOI
Relating tree growth to rainfall in Bolivian rain forests: a test for six species using tree ring analysis
TL;DR: The results of the climate–growth analysis show a positive relationship between tree growth and rainfall in certain periods of the year, indicating that rainfall plays a major role in tree growth.
Journal ArticleDOI
Leaf green-up in a semi-arid African savanna -separating tree and grass responses to environmental cues
TL;DR: In this paper, satellite time series was used to identify tree and grass green-up dates in a semi-arid savanna system, and are there predictable environmental cues for green up for each life form.
References
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Journal ArticleDOI
The role of deep roots in the hydrological and carbon cycles of Amazonian forests and pastures
Daniel C. Nepstad,Cláudio José Reis de Carvalho,Eric A. Davidson,Peter H. Jipp,Peter H. Jipp,Paul Lefebvre,Gustavo Hees de Negreiros,Elson D. da Silva,Thomas A. Stone,Susan E. Trumbore,Simone Aparecida Vieira +10 more
TL;DR: In this article, the authors estimate that half of the closed forests of Brazilian Amazonia depend on deep root systems to maintain green canopies during the dry season, and as much as 15% of this deep-soil carbon turns over on annual or decadal timescales.
Journal ArticleDOI
Comparative Phenological Studies of Trees in Tropical Wet and Dry Forests in the Lowlands of Costa Rica
TL;DR: The results of a comparative phenological investigation of the trees in Wet and Dry forest sites in lowland Costa Rica are reported here to provide a unified analysis of the leafing, flowering, and fruiting periodicities of most species at both sites.
Journal ArticleDOI
Water stress and tree phenology in a tropical dry forest in the lowlands of Costa Rica.
Peter B. Reich,Rolf Borchert +1 more
Journal ArticleDOI
How to Measure Growth Dynamics in Tropical Trees a Review
TL;DR: Dendrochronological methods applied to carefully prepared samples can serve as proof of the annual periodicity of growth zones and the analysis of stable isotopes in rings of tropical trees promise to provide interesting climatological information.