Download or read book Nearshore Restoration Associated with Large Dam Removal AndI Implications for Ecosystem Recovery and Conservation of Northeast Pacific Fish written by J. Anne Shaffer and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation addresses the relationship between large-scale dam removal and the nearshore ecosystem function for fish. The work is based on almost a decade's worth of collaborative field work in the nearshore of the largest dam removal in the world recently completed on the Elwha River. The data analyzed span seven years prior to, during, and throughout the first year of each dam removal (January 2008 to November 2015). As of September 2015, approximately 2.6 million m3 of sediment material increased the area of the Elwha delta to over 150 ha. Long term study of fish in the estuary reveals fish community response to dam removal, and indicates likely interactions in the nearshore between hatchery and wild fish, including chum salmon critical to watershed recovery. Continued hatchery releases may therefore further challenge chum salmon recovery, and this interaction should be considered when planning for future watershed recovery. Community analysis revealed that, while species richness and taxonomic diversity do not appear to have a significant response to dam removal, functional diversity in the nearshore does respond significantly to dam removal. Three main shifts occurred in the nearshore: large scale and rapid creation of estuary habitats; delivery of large amounts of sediment to the delta/estuary in a short period of time, and; a shift in original habitats from tidally influenced to non-tidally influenced habitats resulted in changes in estuary function. Changes in functional diversity occur disproportionately in the new sites, which have more unstable, and so less resilient, communities. Functional diversity in the original estuary sites appears to be more resilient than in the newly created sites due to the large-scale environmental disruption that, ironically, created the new sites. However, the functional diversity at the original sites may be defined in part by management activities, including hatcheries that could mute/mask/inhibit other community responses. Further, functional diversity at the newly formed nearshore areas is predicted to stabilize as the habitats are vegetated and mature. Principal components analysis of Elwha fish community over the course of this study reveals that the fish communities of the Elwha are predictably grouped, indicating that while a few new species are observed, dam removal has not resulted in observable disruptions in fish community assemblages. And finally, nearshore habitats are critical for many forage fish species, and an emerging topic for large-scale dam removals. Forage fish spawning response to dam removal appears to be complex and may be related to multiple factors including high interannual variability in physical habitat conditions, geographic factors and complex life histories of forage fish. Habitat suitability for forage fish spawning should increase as restored ecosystem processes and newly created habitats mature and stabilize, indicating that time may be an important factor in nearshore restoration for forage fish spawning. It is therefore important to implement long-term monitoring and incorporate nearshore ecosystem process and function for multiple life history stages of nearshore species, including forage fish, into large-scale dam removal restoration and management planning.
Download or read book Environmental Assessment for the ARRA Rogue River Restoration written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "In 2009, Jackson County applied for and received a National Oceanic and Atmospheric Administration (NOAA) Coastal and Marine Habitat Restoration Project Grant under the American Recovery and Reinvestment Act (ARRA) to remove the Gold Ray Dam for the purpose of improving fish habitat and passage. The grant was separated into two phases; a first phase that included conducting environmental and other studies to determine the feasibility of removing the dam and a second phase that included the removal of the dam and associated structures. NOAA released the funding for the first phase of the project to the County but delayed the release of funding for phase two until after the National Environmental Policy Act (NEPA) analysis could be completed. National Marine Fisheries Service (NMFS), as the administrator of the grant, must comply with the NEPA requirements to assess the potential impacts of the proposed action on the natural and human environment. In early May 2010, Jackson County, as the dam's owner, decided dam removal is the best option for addressing their long-term interests as the owner of the dam. NMFS is proposing to release funding to Jackson County, Oregon to improve fish passage at the Gold Ray Dam on the Rogue River near Medford, OR. The dam owner, Jackson County, has been working with NMFS and additional project partners to explore the option of dam removal. The purpose of the project is two-fold: (1) to address inadequate fish passage and improve native fish habitat on the Rogue River at Gold Ray Dam; and (2) to address the short- and long-term financial and liability impacts of the dam to Jackson County, Oregon"--Executive summary.
Download or read book From the Edge written by and published by . This book was released on 2000 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recovery Implementation Program for Endangered Fish Species in the Upper Colorado River Basin written by U.S. Fish and Wildlife Service. Region 6 and published by . This book was released on 1987 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Fish Passage Report written by United States. Army. Corps of Engineers. North Pacific Division and published by . This book was released on 1964 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vulnerability of Tropical Pacific Fisheries and Aquaculture to Climate Change written by Johann D. Bell and published by Pacific Community. This book was released on 2011-01-01 with total page 941 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book And Then There Were None written by and published by . This book was released on 1993 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dam Removal in the Pacific Northwest written by Michael C. Blumm and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past dozen years, a number of large dams in the Pacific Northwest have been removed in an effort to restore riverine ecosystems and dependent species like salmon. These dam removals provide perhaps the best example of large-scale environmental remediation in the 21st century. This restoration, however, has occurred on a case-by-case basis, without a comprehensive plan. Yet the result has been to put into motion ongoing rehabilitation efforts in four distinct river basins: the Elwah and White Salmon in Washington and the Sandy and Rogue in Oregon. In all, nine significant dams have been removed, and four more -- in the contentious Klamath Basin of Oregon and California -- are slated for removal in within the next decade. This article surveys both the successful and proposed removals in to draw lessons both within and beyond the Pacific Northwest. We identify a number of factors that determine both the speed and success of dam removal efforts, including the availability of the federal licensing process under the Federal Power Act, the existence and organization of local opposition, the amount and sources of funding, and the support of federal and state resource agencies and well-positioned members of Congress. These factors suggest that the promised removal of the Klamath Dams as well as calls for removing the federal dams on the Lower Snake face significant odds.
Download or read book Pine Flat Dam Fish and Wildlife Habitat Restoration Investigation Fresno County written by and published by . This book was released on 2001 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Community based Ecosystem Approach to Fisheries Management written by Michael G. King and published by . This book was released on 2010 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Dam Removal on Resident Fish Movement in Cijiawan River Taiwan written by Chia-Hsiu Chen and published by . This book was released on 2012 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Freshwater fish change their movement patterns in response to natural or anthropogenic changes in habitat. Dam removal, a major restoration practice to restore river longitudinal connectivity, can affect river habitat with changes in flow regimes and morphological changes due to the sudden release of dam-trapped sediments. In Taiwan, a mid-size dam, Cijiawan #1 dam, was removed in 2011 to provide access to upstream habitat for the endangered target species, Taiwan salmon (Oncorhynchus masou formosanus). A three-phase radio telemetry tracking experiment was conducted to identify the movement patterns before, during and after dam removal. Some tagged fish were also displaced downstream to observe homing behavior. The movements of non-displaced fish showed reduced movement over time and persistence of location which indicates that the influence of disturbance due to capture and tagging was temporary. Displaced fish showed significant long distance movement toward their original home range immediately after release, but became as sedentary as non-displaced fish over time. The displaced fish homing behavior was limited by the barrier effect before dam removal, but daily movements and total absolute stream distance covered both increased after dam removal as fish began accessing upstream habitat. During the dam removal phase, fish below the dam moved very little when the heavy machinery was in the stream and then made long distance movements when upstream habitat was accessible after deconstruction. The rapid response of Taiwan salmon in this study confirmed that the new habitat opened by the dam removal project could be utilized almost immediately, but the sensitivity to habitat degradation indicates that extra attention to short-term habitat impacts should be considered for future stream restoration practices.
Download or read book Klamath Central Pacific Coast Ecoregion Restoration Strategy A holistic ecosystem restoration strategy written by U.S. Fish and Wildlife Service. Klamath Basin Ecosystem Restoration Office and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Targeted Supplemental Environmental Assessment for the Lower Shannock Falls Dam Removal Project written by and published by . This book was released on 2009 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This document is a targeted supplemental environmental assessment (TSEA) for the National Oceanic and Atmospheric Administration's (NOAA) Community-based Restoration Program (CRP), administered within NOAA's National Marine Fisheries Service under the authority of the Fish and Wildlife Coordination Act, 16 U.S.C. 661, as amended by the Reorganization Plan No. 4 of 1970 and the Magnuson-Stevens Fishery Conservation and Management Reauthorization Act of 2006. The CRP is proposing to provide financial assistance to a restoration activity entitled 'Lower Shannock Falls Dam Removal Project, ' through the American Recovery and Reinvestment Act (ARRA). Other financial assistance for the project is being provided by the Natural Resources Conservation Service (NRCS), United States Fish and Wildlife Service (USFWS) and Rhode Island Coastal Habitat Trust Fund. The NRCS is the lead Federal agency implementing the project"--Page [1].
Download or read book Riparian Areas written by National Research Council and published by National Academies Press. This book was released on 2002-10-10 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Effects of Dam Removal on Fish Communities and Habitat in the Sandusky River Ohio written by Taylor E. Sasak and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2018, the Ballville Dam was removed from the Sandusky River, Ohio. The removal of the dam was expected to reconnect areas of upstream habitat, restore fish passage, and improve the fish community. To assess the quantity and quality of available walleye spawning habitat post-dam removal, a habitat suitability index (HSI) model was developed. Model results indicated that there is more walleye spawning habitat upstream of the former dam. Electrofishing surveys were conducted during the spring of 2020 and 2021 (to assess migratory fish passage above the dam) and during summer 2020 (to assess the resident fish community). Walleye were captured upstream of the dam during the 2021 spawning run. Overall, walleye and white bass catch rates and spawn run strengths were lower in post-assessments compared to values seen pre-dam removal. The results of the 2020 post-assessment suggest that the quality of the resident fish community has declined across the study area since the 2009 pre-assessment. However, changes in habitat quality between assessments were less apparent. This study documents the short-term effects of dam removal on river conditions and the fish community post-dam removal.
Download or read book Impacts of the Elwha River Dam Removals on Chinook Salmon Oncorhynchus Tshawytscha Spawning Habitat written by Elizabeth Matteri and published by . This book was released on 2021 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Streambed particle size is a key factor influencing Chinook salmon (Oncorhynchus tshawytscha) spawning site suitability. Both the construction and removal of dams alter the sediment in rivers, resulting in changes to suitable habitat for salmon. When in place, dams impede the movement of sediment, resulting in an accumulation of sediment above the dam and a degradation of the riverbed below the dam. The release of this accumulated sediment after dam removal can restore a more natural distribution of sediment size classes below the dam, potentially improving salmon spawning habitat. Dam removal for the purpose of river restoration and improving conditions for salmon has increased in recent decades. The purpose of this study is to assess the effects of the sediment released from two large dam removals on the Elwha River in Washington state on streambed particle size, and the resultant amount of suitable spawnable habitat for Chinook salmon. Pebble counts were conducted in 45 riffles in 2009, before dam removal, and in 21 riffles in 2015, after dam removal, in the mainstem of the Lower and Middle sections of the Elwha River. The fraction of movable particles by a spawning Chinook salmon in the riffle crests increased by 43% after dam removal, resulting in more suitable spawning habitat. After dam removal, there was greater variation in sediment size within riffle crests, whereas there were predominantly larger particles before dam removal. The positive changes in sediment measured in this project support the concept that dam removal is a meaningful strategy for salmon restoration.
Download or read book Fisheries Research in the Northeast Pacific Ocean written by Eulalie Elizabeth Sullivan and published by . This book was released on 1980 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
