Results 241 to 250 of about 162,405 (282)

Why do trees die? Characterizing the drivers of background tree mortality

Ecology, 2016
Abstract The drivers of background tree mortality rates—the typical low rates of tree mortality found in forests in the absence of acute stresses like drought—are central to our understanding of forest dynamics, the effects of ongoing environmental changes on forests, and the causes and consequences of geographical gradients in the ...
Adrian J Das   +2 more
exaly   +3 more sources

Tree Mortality in Mangrove Forests

Biotropica, 1985
Twenty-eight worldwide reports of massive mangrove tree mortalities are reviewed. Massive mortality is defined as tree mortalities that occur in response to rapid environmental change and affect all size dasses. Massive mortality occurs in addition to normal tree mortality.
Jorge A. Jimenez   +2 more
openaire   +1 more source

PERINATAL MORTALITY—THE WOODS AND THE TREES

Pediatrics, 1968
"Practicing Physicians, not uncommonly, are suspicious of statistical reports and rates and one often hears pejorative comments about any statistics and all statisticians." So wrote Dr. Wegman in his latest "Annual Summary of Vital Statistics,"1 and most readers will only need to look within themselves to see what he was writing about.
openaire   +2 more sources

Thoughts on the Causes of Tree Mortality in Appalachia

Science, 2000
In an article on the history of atmospheric sciences by Paul Crutzen and Veerabhadran Ramanathan (Pathways of Discovery, “The ascent of atmospheric sciences,” 13 Oct., p. [299][1]), there is a picture of dead trees in the Great Smoky Mountain National Park (p. 301).
openaire   +2 more sources

Tree and Sapling Growth and Mortality

2003
Plant-dry-matter accumulation ultimately depends on the yield of carbon building blocks (i.e., nonstructural carbohydrates) from the difference between carbon assimilation (Chapter 3, this volume) and autotrophic respiration (Chapter 4, this volume).
Paul J. Hanson   +5 more
openaire   +1 more source

Growth-dependent tree mortality models based on tree rings

Canadian Journal of Forest Research, 2003
Mortality is a crucial element of population dynamics. However, tree mortality is not well understood, particularly at the individual level. The objectives of this study were to (i) determine growth patterns (growth levels and growth trends) over different time windows that can be used to discriminate between dead and living Norway spruce (Picea abies (
Christof Bigler, Harald Bugmann
openaire   +1 more source

Simulation of Forest Tree Mortality

Forest Science, 1976
Abstract Several methods (discriminant analysis, Probit analysis, Logit analysis) were compared for the prediction of individual overstory tree mortality in northern hardwood stands in Wisconsin. A generalized form of the logistic equation provided the greatest discriminating power for predicting live and dead trees.
openaire   +1 more source

Tree mortality

Forest Health Monitoring: national status, trends, and analysis 2021, 2022
Mark J. Ambrose, Ryan Hanavan, Tom Smith
openaire   +1 more source

Does coring contribute to tree mortality?

Canadian Journal of Forest Research, 2004
We assess the potential of increment coring, a common method for measuring tree ages and growth, to contribute to mortality. We used up to 21 years of annual censuses from two cored and two uncored permanent plots in the Sierra Nevada of California, to detect changes in mortality rates 12 years following coring for individuals >5 cm DBH from two ...
Phillip J. van Mantgem   +1 more
openaire   +1 more source

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