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- W2275993350 abstract "Tree growth rings are applied in forest ecology to understand the relationship between climate and forest growth. To this end, individual trees considered sensitive to climate are sampled and the average effects of climate over a sample period are estimated. Forests are dynamic systems, the structure, composition, and health of which evolve over time. The relationship between climate and growth is likely to change in relation to fundamental shifts in a forest ecosystem. Identifying and understanding changes in the growth-climate relationship requires data from entire forests and models that estimate the effects of climate on forest growth as a function of ecosystem state. We develop a Bayesian hierarchical model that: allows the effects of climate to vary temporally using a state space framework; allows for error propagation across growth ring standardization steps; and, applies climate data at an appropriate spatial scale. The model is applied to tree ring data from northeastern Minnesota. Important climate variables are identified using Bayesian variable selection. Results indicate forest growth is most sensitive to the interactive effects of temperature and precipitation represented through water balance metrics. We observe changes in forest growth response to water balance variables over time with periods of increased sensitivity to water availability. Periods of increased sensitivity correspond to droughts and forest tent caterpillar outbreak years in which the structure and function of study forests change. Variation in the response of tree growth due to climatic extremes or disturbance events are not observable applying conventional dendrochronology models that estimate the average effects of climate on tree growth over time. Our results are one example of additional inferences made possible by using a Bayesian state space approach to model tree growth as a function of climate." @default.
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- W2275993350 date "2016-02-23" @default.
- W2275993350 modified "2023-09-27" @default.
- W2275993350 title "Variable Effects of Climate on Forest Growth in Relation to Ecosystem State" @default.
- W2275993350 hasPublicationYear "2016" @default.
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