Standing dead trees, known as snags, are an essential factor in maintaining biodiversity in forest ecosystems. Combined with their role as carbon sinks, this makes for a compelling reason to study their spatial distribution. This paper presents an integrated method to detect and delineate individual dead tree crowns from color infrared aerial imagery. Our approach consists of two steps which in...

that 286,000 ha in Arkansas were affected by the oak decline. In 2002 and 2003, Guldin et al. (2006) established 181 field plots in Arkansas, Missouri, and Oklahoma and estimated that 33% of red oak density (trees/ha) and 30% of red oak basal area in the region were dead or dying. Kabrick et al. (2004) studied nine forested sites in southern Missouri ranging in size from 312 to 514 ha. They rep...

Dead wood is an important component of the forest for many species. In many locations, however, the presence of dead wood has declined, and there is a need to make what is left more suitable for the myriad of creatures dependent on this material. In this paper, I will summarize the value of dead wood for these species and describe methods for improving the dead wood component of the forest to m...

Abstract A non-invasive method to estimate the number of Trypodendron lineatum holes on dead standing pines ( Pinus sylvestris L.) was developed using linear and nonlinear estimations. classical regression model first used analyze relationship between caused by T. selected stem units total an entire P. . Then, obtain a better fit function data for unit in step, piecewise (PLR) used. Last, area ...

Abstract Retention of habitat trees is a common biodiversity conservation practice in continuous cover forests temperate Europe. Commonly, living are selected on the basis their tree-related microhabitats (TreMs) such as cavities or crown deadwood. Owing to increasing frequency and intensity climate change-related disturbances, particular expected experience increased mortality rates. This may ...