Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Hemlock Ecosystems And Spatial Patterns Of Hemlock Woolly Adelgid Infestation In Northwestern North Carolina
Download Hemlock Ecosystems And Spatial Patterns Of Hemlock Woolly Adelgid Infestation In Northwestern North Carolina full books in PDF, epub, and Kindle. Read online Hemlock Ecosystems And Spatial Patterns Of Hemlock Woolly Adelgid Infestation In Northwestern North Carolina ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Hemlock Ecosystems and Spatial Patterns of Hemlock Woolly Adelgid Infestation in Northwestern North Carolina by : James Radford Graham
Download or read book Hemlock Ecosystems and Spatial Patterns of Hemlock Woolly Adelgid Infestation in Northwestern North Carolina written by James Radford Graham and published by . This book was released on 2008 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spatial Tools for Managing the Hemlock Woolly Adelgid in the Southern Appalachians by : Frank Henry Koch (Jr.)
Download or read book Spatial Tools for Managing the Hemlock Woolly Adelgid in the Southern Appalachians written by Frank Henry Koch (Jr.) and published by . This book was released on 2005 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: adelgid, HWA, hemlock, decision tree classification, topographic normalization, forest pest, forest health, infestation risk.
Book Synopsis Hemlock Woolly Adelgid by : Mark S. McClure
Download or read book Hemlock Woolly Adelgid written by Mark S. McClure and published by . This book was released on 1996 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Insect Biodiversity by : Robert G. Foottit
Download or read book Insect Biodiversity written by Robert G. Foottit and published by John Wiley & Sons. This book was released on 2017-07-24 with total page 1282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume One of the thoroughly revised and updated guide to the study of biodiversity in insects The second edition of Insect Biodiversity: Science and Society brings together in one comprehensive text contributions from leading scientific experts to assess the influence insects have on humankind and the earth’s fragile ecosystems. Revised and updated, this new edition includes information on the number of substantial changes to entomology and the study of biodiversity. It includes current research on insect groups, classification, regional diversity, and a wide range of concepts and developing methodologies. The authors examine why insect biodiversity matters and how the rapid evolution of insects is affecting us all. This book explores the wide variety of insect species and their evolutionary relationships. Case studies offer assessments on how insect biodiversity can help meet the needs of a rapidly expanding human population, and also examine the consequences that an increased loss of insect species will have on the world. This important text: Explores the rapidly increasing influence on systematics of genomics and next-generation sequencing Includes developments in the use of DNA barcoding in insect systematics and in the broader study of insect biodiversity, including the detection of cryptic species Discusses the advances in information science that influence the increased capability to gather, manipulate, and analyze biodiversity information Comprises scholarly contributions from leading scientists in the field Insect Biodiversity: Science and Society highlights the rapid growth of insect biodiversity research and includes an expanded treatment of the topic that addresses the major insect groups, the zoogeographic regions of biodiversity, and the scope of systematics approaches for handling biodiversity data.
Book Synopsis Eastern Hemlock Forests by : Jeffrey S. Ward
Download or read book Eastern Hemlock Forests written by Jeffrey S. Ward and published by . This book was released on 2004 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Standardized Sampling for Detection and Monitoring of Hemlock Woolly Adelgid in Eastern Hemlock Forests by : Scott Costa
Download or read book Standardized Sampling for Detection and Monitoring of Hemlock Woolly Adelgid in Eastern Hemlock Forests written by Scott Costa and published by . This book was released on 2006 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Hemlock Woolly Adelgid Infestation on Water Relations of Carolina and Eastern Hemlock by : Laura Newman Walker-Lane
Download or read book The Effect of Hemlock Woolly Adelgid Infestation on Water Relations of Carolina and Eastern Hemlock written by Laura Newman Walker-Lane and published by . This book was released on 2009 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: introduced pest species, host response, tsuga canadensis, tsuga caroliniana, adelges tsugae.
Book Synopsis Spatial Tools for Managing the Hemlock Woolly Adelgid in the Southern Appalachians by :
Download or read book Spatial Tools for Managing the Hemlock Woolly Adelgid in the Southern Appalachians written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Native to Asia, the hemlock woolly adelgid (Adelges tsugae) has recently spread into parts of the southern Appalachian region. This insect pest attacks both native hemlock species (Tsuga canadensis and T. caroliniana), has no natural enemies, and can kill hemlock trees within just a few years. While biological control displays promise for combating the pest, such counter-measures are significantly hampered because neither adelgid nor hemlock distribution patterns have been detailed explicitly. We developed a spatial management system to better target control efforts. The system has two components: (1) a protocol for mapping hemlock stands, and (2) a technique to map areas at risk of imminent hemlock woolly adelgid infestation. To map hemlock stands, we utilized topographically normalized satellite imagery from Great Smoky Mountains National Park. Because hemlocks are difficult to distinguish using just satellite data, we constructed a decision tree classifier that supplemented the imagery with a suite of topographic, environmental, and proximity variables. We then implemented the classifier in a geographic information system and generated hemlock distribution maps. Our final decision tree had 27 terminal nodes and nine variables, with elevation, image band ratios, topographic relative moisture index, and distance to the closest stream among the most important variables. Accuracy assessment--based on field data and aerial photos--of the maps resulting from this tree yielded an overall thematic accuracy of 90% for one study area and 75% accuracy in capturing hemlocks in a second study area. To map areas at risk, we combined known first-year infestation locations from Great Smoky Mountains National Park and the Blue Ridge Parkway with points from uninfested hemlock stands, recording a suite of environmental variables for each point. We applied four different techniques (discriminant analysis, k-nearest neighbor, logistic regression, and decision tree) to gene.
Book Synopsis Biological Control of Hemlock Woolly Adelgid by :
Download or read book Biological Control of Hemlock Woolly Adelgid written by and published by . This book was released on 2004 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Predicting Infestations of Hemlock Woolly Adelgid (Adelges Tsugae) in Great Smoky Mountains National Park, Tennessee/North Carolina, USA by : Snider Scott F.
Download or read book Predicting Infestations of Hemlock Woolly Adelgid (Adelges Tsugae) in Great Smoky Mountains National Park, Tennessee/North Carolina, USA written by Snider Scott F. and published by . This book was released on 2004 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Hemlock Woolly Adelgid Infestation on Water Relations of Carolina and Eastern Hemlock by :
Download or read book The Effect of Hemlock Woolly Adelgid Infestation on Water Relations of Carolina and Eastern Hemlock written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In North America, hemlock woolly adelgid (HWA; Adelges tsugae Annand) is an exotic insect pest from Asia that is causing severe decimation of native eastern hemlock (Tsuga canadensis (L.) Carr.) and Carolina hemlock (Tsuga caroliniana Engelm.). Extensive research has been committed to the ecological impacts and potential control measures of HWA, but the exact physiological mechanisms that cause tree decline and mortality are not known. Eastern and Carolina hemlock may be reacting to infestation in a manner similar to the response of Fraser fir (Abies fraseri (Pursh.) Poir.) to infestation by balsam woolly adelgid (BWA; Adelges picea Ratz.). It is known that Fraser fir produces abnormal xylem in response to BWA feeding. This abnormal xylem obstructs water movement within the trees, causing Fraser fir to die of water-stress. In this study, water relations within 15 eastern and Carolina hemlock were evaluated to determine if infestation by HWA was causing water-stress. Water potential, carbon-13 isotope ratio, stem conductivity, and stomatal conductance measurements were conducted on samples derived from those trees. In addition, branch samples were analyzed for possible wood anatomy alterations as a result of infestation. Pre-dawn branch water potential (Î ̈) measurements were more negative in infested hemlock than in non-infested trees. Carbon isotope ratios (normalized Î ́13C vs. VPDB) of the branches were more positive for infested trees, while stomatal conductance (gs) was lower in infested trees. These results indicate that infested eastern and Carolina hemlock are experiencing drought-like symptoms. Wood anatomy of the branches provided evidence that infested hemlocks are experiencing abnormal wood production in the xylem.
Author :Third symposium on hemlock woolly adelgid in the eastern United States (Asheville, N.C.) Publisher : ISBN 13 : Total Pages :384 pages Book Rating :4.:/5 (13 download)
Book Synopsis Third Symposium on Hemlock Woolly Adelgid in the Eastern United States by : Third symposium on hemlock woolly adelgid in the eastern United States (Asheville, N.C.)
Download or read book Third Symposium on Hemlock Woolly Adelgid in the Eastern United States written by Third symposium on hemlock woolly adelgid in the eastern United States (Asheville, N.C.) and published by . This book was released on 2005 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Current Composition and Structure of Eastern Hemlock Ecosystems of Northeastern Ohio and Implications of Hemlock Woolly Adelgid Infestation by : Thomas Daniel Macy
Download or read book Current Composition and Structure of Eastern Hemlock Ecosystems of Northeastern Ohio and Implications of Hemlock Woolly Adelgid Infestation written by Thomas Daniel Macy and published by . This book was released on 2012 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of our study were to: 1) compare the community composition and structure of eastern hemlock forest ecosystems of the ELP and GAP; 2) identify environmental factors influencing plant composition and structure; and 3) model HWA- induced eastern hemlock mortality and predict changes in forest composition and structure using the Forest Vegetation Simulator (FVS) and the Hemlock Woolly Adelgid Event Monitor.
Book Synopsis Biological Control of Hemlock Woolly Adelgid by : Nicholas Dietschler
Download or read book Biological Control of Hemlock Woolly Adelgid written by Nicholas Dietschler and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hemlock woolly adelgid (Hemiptera: Adelgidae Adelges tsugae Annand) poses a serious threat to hemlocks in eastern North America, and ongoing research is focused on the identification and development of biological controls to protect and manage hemlock resources. Three predators native to the Pacific Northwest of North America that have been the focus of much research are Leucopis argenticollis (Zetterstedt), Leucopis piniperda (Malloch) (Diptera: Chamaemyiidae), and Laricobius nigrinus (Fender) (Coleoptera: Derodontidae). This study addresses the knowledge gap of adult Leucopis spp. emergence patterns, with comparisons to the timing of larval La. nigrinus drop for pupation. Adult Leucopis spp. emergence was observed in the lab from field-collected, adelgid-infested foliage from Washington state in 2019 and 2020. Adult Leucopis spp. were collected daily as they emerged from foliage collections and identified to species using morphological features; a subset was validated using DNA barcoding. Accumulated heating degree days were calculated to compare a standardized emergence timing across collections made at different locations and temperature regimes. The abundance of the two Leucopis spp. and of the combined Leucopis spp. and La. nigrinus varied among sites and years, and no species was consistently more abundant than the other. Evaluations of seasonal emergence trends of the three species determine the predator complex behaves in a temporally stratified and predictable way. Emergence of adult Le. argenticollis was observed first, followed by La. nigrinus larval drop, with Le piniperda emerging at the end of larval drop, and finally a second emergence of Le. argenticollis.
Book Synopsis Spatial and Temporal Distribution of Hemlock Woolly Adelgid (hemiptera: Adelgidae) Ovisac and Its Associations with the Environment by : Sunghoon Baek
Download or read book Spatial and Temporal Distribution of Hemlock Woolly Adelgid (hemiptera: Adelgidae) Ovisac and Its Associations with the Environment written by Sunghoon Baek and published by . This book was released on 2015 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hemlock written by Anthony D'Amato and published by Yale University Press. This book was released on 2014-04-29 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: An appreciation of the beautiful, iconic, and endangered Eastern Hemlock and what it means to nature and society The Eastern Hemlock, massive and majestic, has played a unique role in structuring northeastern forest environments, from Nova Scotia to Wisconsin and through the Appalachian Mountains to North Carolina, Tennessee, and Alabama. A “foundation species” influencing all the species in the ecosystem surrounding it, this iconic North American tree has long inspired poets and artists as well as naturalists and scientists. Five thousand years ago, the hemlock collapsed as a result of abrupt global climate change. Now this iconic tree faces extinction once again because of an invasive insect, the hemlock woolly adelgid. Drawing from a century of studies at Harvard University’s Harvard Forest, one of the most well-regarded long-term ecological research programs in North America, the authors explore what hemlock’s modern decline can tell us about the challenges facing nature and society in an era of habitat changes and fragmentation, as well as global change.
Book Synopsis Predicting Leucotaraxis Spp. Adult Emergence in the Pacific Northwest With Implications for Biological Control of Hemlock Woolly Adelgid in the Eastern United States by : Liam Farley
Download or read book Predicting Leucotaraxis Spp. Adult Emergence in the Pacific Northwest With Implications for Biological Control of Hemlock Woolly Adelgid in the Eastern United States written by Liam Farley and published by . This book was released on 2024 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hemlock woolly adelgid (Adelges tsugae) is a non-native, invasive pest of eastern hemlock (Tsugae canadensis) and Carolina hemlock (Tsugae caroliniana), both of which are considered important foundation species in forest ecosystems. Adelges tsugae has caused widespread decline and mortality of hemlock trees in eastern North America. Native hemlocks are particularly vulnerable because of the absence of co-evolved plant defenses and lack of natural enemies of A. tsugae. Managing A. tsugae through development of a biological control program has great potential at the regional level. Two species of silver fly from the Pacific northwest (PNW) Leucotaraxis argenticollis and Leucotaraxis piniperda are being studied as potential biological control agents for this purpose, with individuals from wild populations being collected and examined for biological control effectiveness. However, a limitation has been the lack of efficient collection methods for Leucotaraxis spp. sufficient to yield adequate numbers for research and operational releases. In this study, Le. argenticollis and Le. piniperda were assessed for i) the quantitative impacts they have on A. tsugae ovisacs, and ii) the phenology of adult Leucotaraxis spp. in the PNW. Data on observed predation impacts were collected at two locations in North Carolina. Hemlock tree branches infested with A. tsugae were caged with mesh bags and Leucotaraxis spp. were released inside. A. tsugae ovisacs were counted before and after collections. The phenology of adult Leucotaraxis spp. in the PNW was characterized using a degree day model from five years of collection data. Our results show a Leucotaraxis spp. emergence window of 566-730 degree days which aligns with 126-145 Julian days in the study region. Significant negative effects on A. tsugae ovisac counts between controls and Leucotaraxis spp. treatments were found atfound 8 weeks after initial release. These results will help researchers and managers with more effective timing of collections in the PNW and controlled releases of Leucotaraxis spp. within the range of eastern hemlock species.
