Conifer forests in northwestern Mexico have not experienced systematic fire suppression or logging, making them unique in western North America. Fire regimes of Pinus jeffreyi Grev. & Balf. mixed conifer forests in the Sierra San Pedro Martir, Baja California, Mexico, were determined by identifying 105 fire dates from 1034 fire scars in 105 specimens. Fires were recorded between 1521 and 1980 a...

During the past decade, considerable concern has been expressed by environmental scientists over the increasing levels of a range of toxic elements in the environment. Among the most potentially hazardous are the so-called ‘heavy metals’, a term applied to cover a range of transition elements, including copper, zinc and nickel and other elements such as cadmium, mercury and lead. Acutely toxic ...

Numerous charcoal kiln remains can still be found throughout the world, evidencing wood harvesting related to former industries. These represent effective sources and tools for studying (i) pre-industrial pressures on forest resources (ii) past strategies woodland management. However, radiocarbon dating (AMS), which is main tool reconstruct chronology of manufacturing activity, doesn't provide ...

In Mediterranean seasonally dry regions, the rise in dieback and mortality episodes observed pine afforestations has been related to higher drought intensity lack of appropriate management, which enhance competition between trees for water light. However, there is little understanding benefits silviculture plantations under seasonal stress. A combination dendrochronology wood C O isotope analys...

Abstract The tree-ring lab at BOKU University, Vienna, Austria has been sampling and dating by means of dendrochronology in the eastern part since 1996. Among other objects, roof constructions 982 historical buildings were analysed, resulting 13 916 samples. time span extends from oldest truss a church Salzburg, dated to 1135, youngest 1997. aim present paper is provide an overview findings on ...

Coastal forests in the Mid-Atlantic region are threatened by sea level rise through chronic and episodic salinization hydrologic alterations, leading to inland marsh migration occurrence of ghost forests. This study uses dendrochronology explore impact rising on annual growth Juniperus virginiana (the Eastern red cedar) at St. Jones component Delaware National Estuarine Research Reserve Dover, ...

Forest plantations with exotic species in the northwestern Peruvian Andes have brought different ecosystem benefits. The wood productivity this Páramo region is directly related to great availability of water from abundant rainfall compared other regions semi-arid Andes. To address lack information on forest inventories region, study used annual growth rings (dendrochronology) build new models ...

Abstract Dendrochronology in West Africa has not yet been developed despite encouraging reports suggesting the potential for long tree-ring reconstructions of hydroclimate tropics. This paper shows that even absence local tree chronologies, it is possible to reconstruct a region using remote rings. We present Sub-Saharan Drought Atlas (WSDA), new paleoclimatic reconstruction African based on ch...