Floodplain downed wood volumes: a comparison across three biomes

2016 ◽  
Vol 42 (8) ◽  
pp. 1248-1261 ◽  
Author(s):  
Katherine B. Lininger ◽  
Ellen Wohl ◽  
Nicholas A. Sutfin ◽  
Joshua R. Rose
Keyword(s):  
Downed Wood

Within-Patch Structures Influence Small Mammal Abundance in Managed Forests of Northern California, USA

2019 ◽  
Vol 65 (6) ◽  
pp. 796-804 ◽  
Author(s):  
Steven M Gray ◽  
Gary J Roloff ◽  
Andrew J Dennhardt ◽  
Brian P Dotters ◽  
Thomas T Engstrom
Keyword(s):  
Small Mammal ◽  
Forest Type ◽  
Ground Cover ◽  
Ground Squirrels ◽  
Northern California ◽  
Managed Forests ◽  
Forest Types ◽  
Forest Patches ◽  
Downed Wood ◽  
Intensively Managed

Abstract We evaluated how forest type, vegetation structure in trapping webs, and proximate forest types influenced localized (~6.35 hectares) abundances for commonly captured small mammals in northern California, USA. We trapped from May to August of 2011–13 in 69 forest patches that represented: (1) clearcuts (3–5 years postharvest), (2) 10–20 year-old conifer plantations, (3) rotation-aged conifer stands, and (4) Watercourse and Lake Protection Zones. We captured 11 species; four in sufficient numbers for regression modeling. Our average abundance estimates for the study were 4.57 (standard error [SE] = 0.43), 0.32 (SE = 0.11), 0.90 (SE = 0.30), and 0.25 (SE = 0.09) individuals per web location (~0.75 hectares) for Peromyscus spp., Neotoma spp., California ground squirrels, and Allen’s chipmunks. We found that web-level ground cover (shrubs and grass), downed wood, and types of forests containing our trapping webs best described small mammal abundances, whereas proximate forest types were not important. Our results indicated that retaining localized structures in the form of understory shrub cover and downed wood positively influences small mammal abundance in intensively managed forests of northern California.

scholarly journals Logging Residue Volumes and Characteristics following Integrated Roundwood and Energy-Wood Whole-Tree Harvesting in Central Maine

2011 ◽  
Vol 28 (2) ◽  
pp. 66-71 ◽  
Author(s):  
Julia I. Briedis ◽  
Jeremy S. Wilson ◽  
Jeffrey G. Benjamin ◽  
Robert G. Wagner
Keyword(s):  
Limited Information ◽  
Ecological Processes ◽  
Energy Wood ◽  
Partial Harvesting ◽  
Class 1 ◽  
Logging Residue ◽  
Downed Wood ◽  
Study Sites ◽  
Whole Tree Harvesting ◽  
Whole Tree

Abstract Integrated roundwood and energy-wood whole-tree, partial harvesting has become common in Maine over the past decade, yet there is limited information about the volume and characteristics of logging residues left behind on such harvest sites. To better inform forest managers about the downed woody material remaining after whole-tree partial harvesting, we measured downed wood volume and characteristics on 12 harvested sites in central Maine using line intersect sampling. All sites were harvested using mechanical systems (feller-bunchers and grapple skidders) within a year prior to sampling. The mean volume of downed wood across all sites was 726 ± 57 ft3/ac (±SE), 47% of which was residue generated by the harvest. The variability of residue volumes was higher within sites (coefficients of variation between 36 and 69%) than between sites (coefficient of variation, 27%). Coarse woody material between 3 and 6 in. in diameter at the large end dominated the postharvest debris, while logs greater than 10 in. in diameter were scarce. The majority of harvest-generated downed wood was in decay class 1, whereas preharvest debris consisted of mostly decay classes 2, 3, and 4. The volumes of downed wood remaining on the study sites were within the range of volumes found on other managed sites of similar forest types. However, further research is necessary to assess whether these amounts and characteristics are adequate for long-term maintenance of ecological processes.

Downed wood associated with roundwood harvest, whole-tree harvest, and unharvested stands of aspen in Wisconsin

2012 ◽  
Vol 266 ◽  
pp. 239-245 ◽  
Author(s):  
Tracy A.G. Rittenhouse ◽  
David M. MacFarland ◽  
Karl J. Martin ◽  
Timothy R. Van Deelen
Keyword(s):  
Downed Wood ◽  
Whole Tree

scholarly journals Predicting the Availability of Understory Structural Features Important for Canadian Lynx Denning Habitat on Managed Lands in Northeastern Washington Lynx Ranges

2005 ◽  
Vol 20 (4) ◽  
pp. 224-227 ◽  
Author(s):  
Brian A. Gilbert ◽  
Wade Pierce
Keyword(s):  
Stand Structure ◽  
Basal Area ◽  
Predictive Ability ◽  
Structural Features ◽  
Theoretic Model ◽  
Habitat Suitability Model ◽  
Selection Methods ◽  
Information Theoretic ◽  
Downed Wood ◽  
Line Intercept

Abstract Stands identified as potential Canadian lynx denning habitat by a habitat suitability model were sampled in northeastern Washington for stand structure and understory structural features identified as important for denning lynx. Potential den structures were quantified by use of strip transects, and stand structure was quantified through an enhanced forest inventory approach focused on assessing understory and downed wood conditions. Information theoretic model selection methods indicated that the best model to predict potential denning understory structure availability included downed wood abundance, total basal area, and average stand diameter. The strong predictive ability of our models suggest that understory features important to denning lynx can be predicted using traditional inventory data with the addition of a downed wood line intercept methodology. In general, our study supports the suggestion that assessing downed wood availability will effectively address concerns over quantifying the availability of understory structural features identified as being important at lynx den sites. West. J. Appl. For. 20(4):224–227.

Mass of downed wood in northern hardwood forests in New Hampshire: potential effects of forest management

1986 ◽  
Vol 16 (2) ◽  
pp. 335-339 ◽  
Author(s):  
Jeffery A. Gore ◽  
William A. Patterson III
Keyword(s):  
New Hampshire ◽  
Dead Wood ◽  
Large Diameter ◽  
Hardwood Forests ◽  
Northern Hardwood Forests ◽  
Northern Hardwood ◽  
Rapid Decomposition ◽  
Short Rotation ◽  
Downed Wood ◽  
Fallen Dead Wood

Downed (i.e., fallen, dead) wood was sampled in 1-, 15-, 50-, and 100-year-old managed stands, an uneven-aged, managed stand, and an uncut stand of northern hardwoods in New Hampshire. Mass of downed wood ranged from a mean of 32 t/ha in the 15- and 50-year-old stands to 86 t/ha in the recently cut stand. Mean estimates varied significantly among stands, although most of the variation was due to the large amount of downed wood in the recently cut stand. The range of downed-stem diameters was greatest in the 100-year-old and uncut stands. Large (>38 cm) logs were notably absent from the uneven-aged, managed stand, indicating that selective cutting utilizes mature stems efficiently. Comparison of our data with other estimates shows that the amount of downed wood in northern hardwood stands declines to about 20 t/ha within 20–30 years after logging. Quantities remain relatively stable for up to an additional 30 years and then begin to increase. They stabilize at 35–40 t/ha after approximately 100 years. Large-diameter logs become an increasingly important component of downed wood as stands mature beyond 50 years of age. Rapid decomposition of even the largest logs precludes continued accumulation of downed wood in uncut, old-growth stands. The data suggest that less downed wood and fewer large-diameter logs are likely to accumulate under short-rotation (<50 years) harvest, whole-tree harvests, and selection cuts than under long rotations or in uncut forests.

Characteristics of downed wood across headwater riparian ecotones: integrating the stream with the riparian area

2010 ◽  
Vol 40 (8) ◽  
pp. 1604-1614 ◽  
Author(s):  
Kathryn L. Holmes ◽  
P. Charles Goebel ◽  
Arthur E.L. Morris
Keyword(s):  
Riparian Forest ◽  
Structural Characteristics ◽  
Transitional Zone ◽  
Lateral Position ◽  
Riparian Area ◽  
Holistic Management ◽  
Decay Class ◽  
Structural Relationships ◽  
Downed Wood ◽  
Traditional Approaches

Although downed wood is a significant structural component of riparian ecotones, most studies of downed wood dynamics are conducted only within the stream bankfull channel or on the riparian forest floor. We examined downed wood structural characteristics (e.g., length, volume, and decay class) across the entire riparian ecotone of seven headwater streams in mature deciduous forests of northeastern Ohio to understand the structural relationships between downed wood and riparian ecotones. Sampling was stratified by hydrogeomorphic zones that were defined by lateral position within the riparian ecotone and correspond to differing fluvial geomorphology. Most downed wood pieces sampled were small (<1 m) and with a high decay class. Downed wood pieces within the baseflow zone (within the wetted channel) were smaller and more abundant than those within the transitional zone (within the bankfull channel excluding the wetted channel). Surface contact was inversely related to aquatic influence across the riparian ecotone, with downed wood in Zone 3 (riparian area beyond the bankfull channel) having significantly higher contact than wood within the other zones. The ecotonal approach and the incorporation of hydrogeomorphic influences is an alternative approach that moves beyond traditional approaches to more holistic management of riparian forests.

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