Results 211 to 220 of about 4,639 (262)
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Prism sweeps for coarse woody debris
Canadian Journal of Forest Research, 2003A new method for sampling coarse woody debris (CWD) is presented, based on relascope sampling of CWD midpoint diameter. In this method, CWD is included in a sample if the angle subtended by the midpoint diameter viewed from plot center is greater than the critical relascope angle. The method is therefore referred to as diameter relascope sampling (DRS).
Daniel P Bebber, Sean C Thomas
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Assessment of Coarse Woody Debris
1998In this paper, different probability sampling methods for assessing coarse woody debris (CWD) are compared. The methods are circular plot sampling, strip surveying, line intersect sampling, and transect relascope sampling. The two latter methods are suited primarily for the assessment of CWD on the ground.
Göran Ståhl, Tomas Lämås
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Development of spatial pattern in large woody debris and debris dams in streams
Geomorphology, 2003The spatial distribution of large woody debris (LWD) in streams was evaluated using Neighbor K statistics, following extensive wood deposition from an ice storm in the eastern Adirondack Mountains (New York). Two years after wood deposition, we surveyed individual pieces of LWD in one stream and surveyed debris dam locations in eight streams within the
Clifford E. Kraft, Dana R. Warren
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Growth and Mating of Cryptococcus neoformans var. grubii on Woody Debris
Microbial Ecology, 2008A total of 36 Cryptococcus neoformans strains originating from South Africa were screened for wood degrading enzymes. All strains tested positive for cellulase activity while none where capable of xylan degradation. Three C. neoformans var. grubii strains, originating from clinical and environmental samples, representing the same genotype (VNI/AFLP1-C.
Botes, A. +5 more
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Refining volume estimates of down woody debris
Canadian Journal of Forest Research, 2007Down woody debris (DWD) plays a vital role in forest ecosystem structure and function. Although volume is likely the most common metric used to characterize DWD, an evaluation of the formulae used for volume estimation on individual DWD pieces has received little attention. We determined actual volume of 155 diverse DWD pieces (types, species, lengths,
Shawn Fraver +2 more
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Probability of Woody Debris Passage at Rock Weirs
2022Often, large woody debris (LWD) at hydraulic structures is considered hazardous from a performance and public safety perspective. However, the sustainable management of rivers requires the consideration of ecological impacts of LWD such as cover for aquatics and the natural movement of LWD through a catchment.
Margetts, Kathryn A., Crookston, B. M.
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1992
Significant quantities of woody debris are found in stream channels draining forested watersheds. For example, as much as 250–800 tons/hectare of woody debris were found in stream channels of old growth conifer forests compared to 40–130t/ha in streams draining mixed hardwood forests (Triska and Cromack 1980).
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Significant quantities of woody debris are found in stream channels draining forested watersheds. For example, as much as 250–800 tons/hectare of woody debris were found in stream channels of old growth conifer forests compared to 40–130t/ha in streams draining mixed hardwood forests (Triska and Cromack 1980).
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Stability of Ballasted Woody Debris Habitat Structures
Journal of Hydraulic Engineering, 2000An important component of stream restoration in the Pacific Northwest is the reintroduction of large woody debris (LWD) and construction of LWD habitat structures in degraded systems. A significant problem faced by engineers involved in stream restoration is a lack of physically based guidelines for design and construction of ballasted LWD habitat ...
Stéphane G. D'Aoust, Robert G. Millar
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Decomposition of woody debris in Western Australian forests
Canadian Journal of Forest Research, 1996Changes in mass and nutrients in experimental logs of six tree species during 5 years of exposure in the three major forest production regions of southwest Western Australia were measured to determine how climate, substrate quality, and substrate size interact to regulate decomposition of woody debris in this Mediterranean-type climate. Branch (3–5 cm
Sandra Brown +3 more
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Coarse woody debris in forest regions of Russia
Canadian Journal of Forest Research, 2002To assess regional stores of coarse woody debris (CWD) in seven major forest regions of Russia, we combined data collected as part of the routine forest inventory with measurements in 1044 sample plots and the results of density sampling of 922 dead trees. The stores of CWD in the western part of Russia (St.
Olga N Krankina +10 more
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