منابع مشابه
Application of Survival Tree Model in Determining Affecting Factors in Breastfeeding Duration
Background and Purpose: Survival tree model is a nonparametric method which can be used to identify the affecting factors from a specific time to the onset of an event. In this method, the categories are selected according to the most important factors. The purpose of this study was to determine the factors affecting the duration of breastfeeding in mothers and introduce the homogeneous subgrou...
متن کاملFuels Management Reduces Tree Mortality from Wildfires In Southeastern United States
The object ive was to determine the ef fect iveness of a regular prescribed burning programfor reducing tree mortal i ty in southern pine forests burned by wi ldf ire . This s tudy was conducted on publ ic and industry lands in northeast Florida. On the Osceola National Forest, mean mortality was 3.5% in natural stands and 43% in plantations two growing seasons after u June 1998 wildfire. Burn ...
متن کاملLong-term interactions between migratory caribou, wildfires and Nunavik hunters inferred from tree rings.
Barren-ground caribou (Rangifer tarandus) herds in North America may reach considerable size and undertake large-scale seasonal migrations from the Arctic tundra to the boreal forest. To test the caribou decline hypothesis associated with native harvesting and fire, we have documented the long-term trends of caribou activity based on a novel approach which uses tree-ring dated trampling scars p...
متن کاملClimate Change and Wildfires
Wildland fire regimes are primarily driven by climate/weather, fuels and people. All of these factors are dynamic and their variable interactions create a mosaic of fire regimes around the world. Climate change will have a substantial impact on future fire regimes in many global regions. Current research suggests a general increase in area burned and fire occurrence but there is a lot of global...
متن کاملWildfires ignite concern.
Every year in the United States wildfires destroy hundreds of homes and cause millions of dollars in damage. From January through May of this year, for example, 2,702 wildfires scorched 198,228 acres in Florida amidst one of the worst droughts in a century. Although wildfires can actually be good for the environment, helping it to stay healthy and restore itself, they can have harmful human con...
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ژورنال
عنوان ژورنال: Silva Fennica
سال: 1993
ISSN: 2242-4075
DOI: 10.14214/sf.a15682