Riparian zone coarse woody debris dynamics in forrested applachian watersheds PDF Download
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Author: Aaron J. White
Publisher:
ISBN:
Category :
Languages : en
Pages : 37
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Author: Aaron J. White
Publisher:
ISBN:
Category :
Languages : en
Pages : 37
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Author: Rebekah Pine
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 47
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Book Description
Large woody debris (LWD) has been credited as an important structural and functional component of riparian and in-stream ecosystems. LWD that recruits from riparian zones into stream bankfull margins is crucial in understanding the connectivity between the two ecosystems. The amount of riparian zone and in-stream LWD is closely linked to the time since last disturbance and successional patterns following that disturbance or disturbance events. However, this relationship is poorly understood in southern Appalachian landscapes. I analyzed the amount and volume of LWD in stands of contrasting establishment ages in the Sipsey Wilderness of the Bankhead National Forest, Alabama and the large woody debris loading in streams that were contained within three establishment classes. The establishment classes span 60 years (pre-1900s to 1950s) and incorporate three stages of forest development: stem exclusion, understory reinitiation, and understory reinitiation that is transitioning into complex. The most often cited pattern of LWD loading across forest ages is a parabola shape. However the abundance and volume of LWD across the establishment classes in the study area followed a bell shape pattern with the highest amount and volume of riparian zone LWD in the 1930s age class. In this establishment class mean volume of LWD per plot was 5.62 m3 ± 1.17 SE compared to 4.26 m3 ± 0.60 SE in the pre-1900s establishment class and 5.09 m3 ± 0.59 SE in the 1950s establishment class. Mean density and mean volume of riparian zone LWD per plot did not significantly differ across the chronosequence. The mean volume of in-stream LWD followed the same bell shape pattern with the highest mean volume of in-stream LWD per plot also occurring in the 1930s establishment class (2.50 m3 ± 0.72 SE). However, there was no significant difference in the density or volume of in-stream LWD across the chronosequence. Not only does this study provide specific LWD abundance and volume for specific stand ages but it also can provide baseline data for mature Quercus stands. In addition, my research begins to explore how stand dynamics influences LWD in a southern Appalachian system.
Author:
Publisher:
ISBN:
Category : Biodiversity
Languages : en
Pages : 156
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Author:
Publisher:
ISBN:
Category : Biodiversity
Languages : en
Pages : 156
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Author: Wayne T. Swank
Publisher: Oxford University Press
ISBN: 0195370155
Category : Nature
Languages : en
Pages : 274
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A long-term study of the effects of clearcutting on forest and stream ecosystems.
Author: Timothy Gould
Publisher:
ISBN:
Category :
Languages : en
Pages :
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The wetlands and riparian corridors of North Americas Mid-Atlantic Region (MAR) have been under constant and continuing pressure from anthropogenic settlement since before the arrival of the first Europeans on the continent. Disturbances related to human development have impeded the functioning of these ecosystems and reduced the quantity and quality of services they provide to society. An understanding of the detrimental effects of landscape alteration has grown within the past few decades, and in this relatively short period of time, a wealth of research has been compiled on how to reverse these effects through restoration. Floodplains, often heavily settled and modified, have been of particular interest as they provide valuable services such as flood attenuation, soil enrichment, and water storage. Within the context of floodplains, limited attention has been paid to coarse woody debris (CWD) and its role in the ecosystem. Historically, coarse woody debris has been removed from channels and riparian corridors by people for a number of reasons. It is now understood to be a crucial element of ecosystem architecture, and efforts are being made to characterize how CWD dynamics within the landscape affect functioning and service provisioning. Although a body of work on this subject has been produced in the Pacific Northwest of the U.S., there are still many questions that remain to be answered. This research utilizes data collected during rapid field assessments of habitat quality, in conjunction with intensive surveys of debris, to determine how anthropogenic disturbance influences debris abundances and characteristics in floodplain systems. This study was completed in the central Pennsylvania portion of the MAR, an area that, though heavily forested, has received little attention in debris studies. Results demonstrate that the greatest quantities of debris are associated with sites experiencing the least amount of anthropogenic disturbance, and that the debris found at these sites shows greater diversity in size than debris found elsewhere. A moderately-robust mathematical relationship was also established between debris counts and riparian forest basal areas, indicating that this measurement of habitat quality may be the best predictor of debris concentration. These findings have important implications for both ecological integrity and ecosystem service provisioning, and will hopefully enable land managers in the Mid-Atlantic Region to make informed choices regarding debris installations on their properties.
Author:
Publisher: DIANE Publishing
ISBN: 1422345688
Category :
Languages : en
Pages : 156
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Author: Don C. Bragg
Publisher:
ISBN:
Category : Riparian forests
Languages : en
Pages : 44
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Book Description
As our understanding of the importance of large woody debris (LWD) evolves, planning for its production in riparian forest management is becoming more widely recognized. This report details the development of a model (CWD, version 1.4) that predicts LWD inputs, including descriptions of the field sampling used to parameterize parts of the model, the theoretical and practical underpinnings of the model's structure, and a case study of CWD's application to a stream in Wyoming's Bridger-Teton National Forest.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309082951
Category : Science
Languages : en
Pages : 449
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Book Description
The Clean Water Act (CWA) requires that wetlands be protected from degradation because of their important ecological functions including maintenance of high water quality and provision of fish and wildlife habitat. However, this protection generally does not encompass riparian areasâ€"the lands bordering rivers and lakesâ€"even though they often provide the same functions as wetlands. Growing recognition of the similarities in wetland and riparian area functioning and the differences in their legal protection led the NRC in 1999 to undertake a study of riparian areas, which has culminated in Riparian Areas: Functioning and Strategies for Management. The report is intended to heighten awareness of riparian areas commensurate with their ecological and societal values. The primary conclusion is that, because riparian areas perform a disproportionate number of biological and physical functions on a unit area basis, restoration of riparian functions along America's waterbodies should be a national goal.
Author: Peter R. Kapeluck
Publisher:
ISBN:
Category : Coarse woody debris
Languages : en
Pages : 360
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Book Description
