Seasonal Movements of Adult Summer Steelhead in Steamboat and Canton Creeks, North Umpqua River, Oregon PDF Download
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Author: James J. Wroble
Publisher:
ISBN:
Category : Steelhead (Fish)
Languages : en
Pages : 43
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Book Description
Author: James J. Wroble
Publisher:
ISBN:
Category : Steelhead (Fish)
Languages : en
Pages : 43
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Book Description
Author: James J. Wroble
Publisher:
ISBN:
Category : Steelhead (Fish)
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 206
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Book Description
Author: Claudio Rafael Mariano Baigʹun
Publisher:
ISBN:
Category : Steelhead (Fish)
Languages : en
Pages : 200
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Book Description
This study examined features of deep pool (>0.8 m mean depth) used by adult summer steelhead in Steamboat Creek (1991-1992). Steamboat Creek had a heterogenous thermal profile, with some segments exceeding preferred temperature of steelhead. Deep pools were scarce (4% of the total habitat units) and 39% of them were identified as cool pools (mean bottom water temperature [lesstan or equal to] 19°C). Adult summer steelhead were found primarily in deep pools, avoiding other habitats (glides, riffles) and even cold but shallow tributary junctions. Use of odds ratio showed that use of cool pools use was estimated to be 11 times greater than the odds of the use of warm pools (P
Author: Steven A. Holaday
Publisher:
ISBN:
Category : Stream ecology
Languages : en
Pages : 256
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Book Description
The Steamboat Creek basin drains 227 mi2 (588 km2) of steep forested terrain into the North Umpqua River of Southwest Oregon, 39 mi (63 km) northeast of Roseburg. Summer base flows for Steamboat Creek average 83 cfs (2.35 m3/sec). Steamboat Creek and its tributaries are considered important to the production of summer-run steelhead; the basin has been closed to angling since 1932. Harvesting has occurred in every subdrainage of the Steamboat Creek basin. Trees were routinely removed from riparian areas when harvesting in the basin began in 1955. Since the mid-1970s to early-1980s, however, buffer strips were left adjacent to streams. In addition, the floods of 1964-65 caused significant damage to riparian vegetation in the basin. This study was undertaken to: (1) determine long-term trends over the period 1969-90 of summertime water temperatures in the mainstem of Steamboat Creek, selected tributaries, and in Boulder Creek, an unharvested control stream in an adjacent watershed and (2) evaluate spacial patterns of maximum water temperatures in the Steamboat Creek basin during the summer of 1990. Significant (P [less than or equal to] 0.10) trends of decreasing maximum daily summertime stream temperatures on Steamboat Creek and tributaries occurred from 1969-90. In contrast, an unharvested control stream showed a small, but nonsignificant, increasing trend in stream temperatures. The largest decrease in maximum stream temperatures (7 to 11°F, 3.9 to 6.1°C) occurred on small streams with summer base flows less than 6 cfs (0.17 m3/sec). These streams also had the highest proportion of stream length adjacent to harvesting activities before 1974. The smallest decrease in maximum stream temperatures (0 to 3°F, 0 to 1.7°C) occurred on streams with little or no history of timber harvest activity along riparian areas, or at locations where summer base flows were greater than 15 cfs (0.42 m3/sec). Since no trends in either air temperature or streamflow were apparent over the 1969-90 period, regrowth of riparian vegetation that was previously removed by flooding, debris torrents, or streamside harvesting, appears to be the major cause of trends in decreasing maximum summer stream temperature. Regrowth of riparian vegetation provides shade over small streams, decreasing energy input to the stream from solar radiation. Maximum daily stream temperatures in lower Steamboat Creek did not change significantly during the 1969-90 study period and stream temperature data in 1960 indicates that maximum stream temperatures in lower Steamboat Creek have historically been high. Any cooling effects by groundwater or tributaries are largely negated by the large volume of water in the main channel. Also, the large stream width renders riparian vegetation relatively ineffective in protecting the stream from solar radiation. Minimum stream temperatures decreased during the 1969-90 study period for all of the long-term stations in the Steamboat Creek basin while the control stream showed a slight increasing trend. Similarly, diurnal stream temperature fluctuations decreased for several tributaries.
Author:
Publisher:
ISBN:
Category : Forest fire forecasting
Languages : en
Pages : 52
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Book Description
The objective of this study was to provide managers with national-level data on current conditions of vegetation and fuels developed from ecologically based methods to address these questions: How do current vegetation and fuels differ from those that existed historically? Where on the landscape do vegetation and fuels differ from historical levels? In particular, where are high fuel accumulations? When considered at a coarse scale, which areas estimated to have high fuel accumulations represent the highest priorities for treatment?
Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 266
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Book Description
Author: Lawrence Rakestraw
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 264
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Book Description
Author: Harold K. Steen
Publisher:
ISBN: 9780295983738
Category : History
Languages : en
Pages : 356
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Book Description
The U.S. Forest Service celebrates its centennial in 2005. With a new preface by the author, this edition of Harold K. Steen’s classic history (originally published in 1976) provides a broad perspective on the Service’s administrative and policy controversies and successes. Steen updates the book with discussions of a number of recent concerns, among them the spotted owl issue; wilderness and roadless areas; new research on habitat, biodiversity, and fire prevention; below-cost timber sales; and workplace diversity in a male-oriented field.
Author:
Publisher: Nova Science Pub Incorporated
ISBN: 9781606920565
Category : Law
Languages : en
Pages : 93
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Book Description
The U.S. Department of the Interior's Bureau of Land Management (BLM), Fish and Wildlife Service, and National Park Service, and the U.S. Department of Agriculture's Forest Service manage about 628 million acres of public land, mostly in the 11 western states and Alaska. Under the Federal Land Transaction Facilitation Act (FLTFA), revenue raised from selling BLM lands is available to the agencies, primarily to acquire non-federal land within the boundaries of land they already own -- known as in-holdings, which can create significant land management problems. To acquire land, the agencies can nominate parcels under state-level interagency agreements or the Secretaries can use their discretion to initiate acquisitions. FLTFA expires in 2010. The author was asked to determine (1)FLTFA revenue generated, (2)challenges to future sales, (3)FLTFA expenditures, and (4)challenges to future acquisitions. This is an edited and indexed edition.
