INSIDE FOREST MENSURATION

Video Mensuration Using a Stationary Camera

Birds see the trees inside the forest: The potential impacts of changes in forest composition on songbirds during spring migration

Since European settlement, hardwood dominated forests of the Upper American Midwest have undergone compositional changes due to fire suppression and changes in land use. It is not clear how these changes affect songbirds during spring migration. In 2009 and 2010, we quantified foraging behavior by migratory songbirds during spring migration and collected data on tree and sapling diversity in th...

Meteorological effects on the 3D sound propagation inside an inhomogeneous forest area

The influence of trees on sound propagation is currently discussed to reduce the sound exposure near transport infrastructure or industrial areas. This influence is direct due to reflection and scattering at the trees themselves as well as indirect through meteorological and ground effects modified by the trees. Previous investigations provide a mixed picture of sound attenuation within foreste...

Genetic structure inside a declining red oak community in old-growth forest.

Problems with oak regeneration have been documented in the last 50 years at numerous sites in the Midwestern United States. We applied nuclear microsatellites to examine the demographic and fine-scale spatial genetic structure of red oaks in two old-growth stands in Indiana. Oaks in one stand have declined in numbers over the past several decades whereas oaks in the other, smaller stand have in...

Mensuration of the Dried Collodion Membrane (calcu- Lation of Dimensions and of Relations

In a previous paper of this series a flat form of the dried collodion membrane and its method of preparation was described (1). As this form of membrane presented certain advantages in durability and convenience of manipulation over the previously used bag membranes, it was the type used in most of the subsequent investigations. Electric transfer experiments in which relatively strong electric ...