Results The C : N ratio in plant tissue, litter, forest floor and mineral soil exhibited large variation across various sequences, with an average of 145.8 9.4 (mean SE), 49.9 3.0, 38.2 3.1 and 18.5 0.9, respectively. In most sequences, the plant tissue C : N ratio increased significantly with stand age, while the C : N ratio in litter, forest floor and mineral soil remained relatively constant...

Management changes such as drainage, fertilisation, afforestation and harvesting (clearfelling) of forested peatlands influence watertable (WT) position and groundwater concentrations of nutrients. This study investigated the impact of clearfelling of a peatland forest on WT and nutrient concentrations. Three areas were examined: (1) a regenerated riparian peatland buffer (RB) clearfelled four ...

Because of the prolonged history of disturbance caused by intense human activities, restoration in China has been a major task facing many ecologists and land managers. There are six major forest types in China: cold temperate coniferous forest, temperate coniferous and broad-leaved mixed forest, warm temperate deciduous broad-leaved forest, subtropical evergreen broad-leaved forest, tropical r...

In order to comprehend detailed forest resources, the use of high spatial resolution data is expected. However, the efficeint forest cover type classification method of high spatial resolution data is not cleared yet. So, this study discussed the potential of the forest cover type classification such as classification of coniferous forest, broadleaved forest, and mixed forest, and tree speices ...

We report on nests of radio-marked marbled murrelets (Brachyramphus marmoratus) nesting in unusual habitats in southwestern British Columbia. We found 1 confirmed and 2 probable marbled murrelet nest sites on cliffs. These represent the 1st substantiated accounts of ground nesting in this species south of Alaska. In addition, we found a marbled murrelet nesting in a 130 (?5)-yr-old red alder (A...

Based on a large number of floristic plots (n = 82 581), the French forest status related to soil nitrogen (N) availability was reconstructed from herb species bio-indication spanning from1910 to 2010. The temporal changes highlighted a decrease in available-N until 1990s in coniferous and broadleaved forests (mean ΔC:N=+0.79 and +0.74 C:N units, respectively). It was followed by an increase in...

THOMAS, C. E., and PARKESOL, B. R. 1991. Simple, flexible, trigonometric taper equations. Can. J. For. Res. 21: 1132-1137. There have been numerous approaches to modeling stem form in recent decades. The majority have concentrated on the simpler coniferous bole form and have become increasingly complex mathematical expressions. Use of trigonometric equations provides a s imple expression of tap...

Carbonyl compounds in boreal coniferous forest air in Hyytiälä, Southern Finland H. Hellén, H. Hakola, A. Reissell , and T. M. Ruuskanen Finnish Meteorological Institute, Sahaajankatu 20 E, 00880 Helsinki, Finland University of Helsinki, Department of Physical Sciences, Finland University of Helsinki, Department of Chemistry, Finland Received: 16 April 2004 – Accepted: 11 May 2004 – Published: ...

The echolocation calls of the noctule bat Nyctalus noctula (Schreber, 1774) were recorded at night, from June to August 1991, using a QMC S200 bat detector, in 5 habitats (river, forest-meadow ecotone, village, coniferous forest, deciduous forest) of the Białowieża Primeval Forest (eastern Poland). Two main kinds of signals were identified: search calls and feeding buzzes. Acoustic activity was...