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- W2296747544 abstract "Tree-ring studies provide important contributions to understanding the climate sensitivity of tropical trees and the effects of global change on tropical forests. This chapter reviews recent advances in tropical tree-ring research. In tropical lowlands, tree ring formation is mainly driven by seasonal variation in precipitation or flooding , and not in temperature. Annual ring formation has now been confirmed for 230 tropical tree species across continents and climate zones. Tree-ring studies indicate that lifespans of tropical tree species average c. 200 years and only few species live >500 years; these values are considerably lower than those based on indirect age estimates. Size-age trajectories show large and persistent growth variation among trees of the same species, due to variation in light, water and nutrient availability. Climate-growth analyses suggest that tropical tree growth is moderately sensitive to rainfall (dry years reduce growth) and temperature (hot years reduce growth). Tree-ring studies can assist in evaluating the effects of gradual changes in climatic conditions on tree growth and physiology but this requires that sampling biases are dealt with and ontogenetic changes are disentangled from temporal changes. This remains challenging, but studies have reported increases in intrinsic water use efficiency based on δ13C measurements in tree rings, most likely due to increasing atmospheric CO2. We conclude that tree-ring studies offer important insights to global change effects on tropical trees and will increasingly do so as new techniques become available and research efforts intensify." @default.
- W2296747544 created "2016-06-24" @default.
- W2296747544 creator A5007210509 @default.
- W2296747544 creator A5047291253 @default.
- W2296747544 creator A5088493254 @default.
- W2296747544 date "2016-01-01" @default.
- W2296747544 modified "2023-10-17" @default.
- W2296747544 title "Tree Rings in the Tropics: Insights into the Ecology and Climate Sensitivity of Tropical Trees" @default.
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