Competition-induced mortality for Mediterranean Pinus pinaster Ait. and P. sylvestris L.

TL;DR: The results suggest that an altitudinal upwards migration of Quercus species, mediated by the dieback of the currently dominant species, may take place in the studied slopes, putting many rear-edge populations of Scots pine sheltered in the mountain environments of the Iberian Peninsula at risk under future climate scenarios.

TL;DR: The results showed that fast-growing trees were more severely affected by the drought and retained proportionally lower growth rates up to three years after the episode, while older trees were found to be less resilient to drought.

TL;DR: In this paper, the importance of competition in determining tree mortality in old-growth forests on the western slope of the Sierra Nevada of California, U.S.A. was investigated.

TL;DR: A large-scale self-thinning related to the recent densification of Scots pine forests appears to be enhanced by dry conditions and may lead to a mismatch in forest turnover, suggesting forest management may be an essential adaptive tool under the drier conditions predicted by most climate models.

TL;DR: It is concluded that the Leiria version of the PBRAVO model does not adequately represent reality and that forecasts lack sufficient accuracy for forest management purposes.

TL;DR: Logistic models predicting probability of survival for individual trees were developed, respectively, for Norway spruce, Scots pine, birch, and for other broadleaved trees to have an appropriate level of reliability in large scale forestry scenario models for even-aged and uneven-aged forests.

Abstract: Published mortality models have not always done an adequate job of predicting the probability of mortality following thinning. This paper describes a mortality model based on a series of thinned and unthinned sample plots located in northern Idaho, some of which have been measured for 70 years. Independent variables are diameter at breast height (dbh), stand basal area, annual diameter growth, relative dbh, and species. Thinning results in changes in three of these variables: the stand basal area, relative dbh, and diameter growth rate. Model performance is evaluated by considering how well the model fits the development data set, how well the model fits an independent data set, and how well the model fits biological reality. In each evaluation the selected model shows a marked improvement over the performance of the mortality model used in previous releases of the Stand Prognosis Model (Wykoff et al. 1982). The model is shown to perform well in both thinned and unthinned stands. Forest Sci. 32:989-1000.

TL;DR: A generalized logistic model of individual tree mortality was developed for trembling aspen (Populus tremuloides Michx), white spruce (Picea glauca (Moench) Voss), and lodgepole pine (Pinus contor... as discussed by the authors.