Comparative Population Biology Of Native And Invasive Crayfish In The John Day River Oregon Usa PDF Download
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Author | : Keith Lawrence Sorenson |
Publisher | : |
Total Pages | : |
Release | : 2012 |
Genre | : |
ISBN | : |
Download Comparative Population Biology of Native and Invasive Crayfish in the John Day River, Oregon, USA Book in PDF, ePub and Kindle
Author | : Mathis Loïc Messager |
Publisher | : |
Total Pages | : 153 |
Release | : 2017 |
Genre | : |
ISBN | : |
Download Understanding and Predicting the Leading Edge Dynamics of Invasive Rusty Crayfish (Orconectes Rusticus) in the John Day River Book in PDF, ePub and Kindle
Continued ecological impacts of invasive species on freshwater ecosystems is one of the main challenges confronting ecologists and decision makers in conserving biodiversity and ecosystem function today. Efforts to prohibit the initial introduction of nonnative species are widely recognized to be the most cost-effective management and policy strategy. However, when aquatic invasive species become established and start spreading through the landscape, efforts to slow their proliferation remain severely limited by a lack of adequate forecasting tools and understanding of their secondary spread. My thesis aims to address these challenges by improving our understanding of and predicting the leading edge dynamics of the invasive rusty crayfish Orconectes rusticus (now Faxonius rusticus) in the John Day River (JDR) basin, a major tributary of the Columbia River in northeastern Oregon. In Chapter 1, I demonstrate the use of a spatially explicit individual-based model to recreate the invasion history of rusty crayfish in the JDR and forecast its future distribution. This study shows that controlling the spread of invasive species is possible even after their establishment, when control efforts can be effectively allocated, and that spatially explicit individual-based models can provide unique insight into the secondary spread of aquatic invasive species and concretely support decision makers in choosing optimal control strategies. Chapter 2 investigates whether phenotypic differences exist between rusty crayfish individuals at the boundary of their invasion range compared to their conspecifics closer to their initial location of introduction. I show that rusty crayfish in the JDR have developed less competitive morphology and better physiological condition as they spread towards the edge of their current invasion range and feed lower in the food web in invasion front populations than in core areas. By accounting for variations in temperature, primary productivity, and macroinvertebrate biomass throughout the invasion gradient of rusty crayfish, my research suggests that low conspecific densities and natural selection by spatial sorting are the primary drivers of these phenotypic changes, which suggests that these trends are likely to grow stronger over time as rusty crayfish keep spreading. Together, these chapters not only improve our understanding of the leading edge dynamics of aquatic invasive species such as rusty crayfish but also improve our ability to control their spread and reduce their impact on invaded ecosystems.
Author | : Robert A. Francis |
Publisher | : Routledge |
Total Pages | : 918 |
Release | : 2012-03-12 |
Genre | : Science |
ISBN | : 1136461248 |
Download A Handbook of Global Freshwater Invasive Species Book in PDF, ePub and Kindle
Invasive non-native species are a major threat to global biodiversity. Often introduced accidentally through international travel or trade, they invade and colonize new habitats, often with devastating consequences for the local flora and fauna. Their environmental impacts can range from damage to resource production (e.g. agriculture and forestry) and infrastructure (e.g. buildings, road and water supply), to human health. They consequently can have major economic impacts. It is a priority to prevent their introduction and spread, as well as to control them. Freshwater ecosystems are particularly at risk from invasions and are landscape corridors that facilitate the spread of invasives. This book reviews the current state of knowledge of the most notable global invasive freshwater species or groups, based on their severity of economic impact, geographic distribution outside of their native range, extent of research, and recognition of the ecological severity of the impact of the species by the IUCN. As well as some of the very well-known species, the book also covers some invasives that are emerging as serious threats. Examples covered include a range of aquatic and riparian plants, insects, molluscs, crustacea, fish, amphibians, reptiles and mammals, as well as some major pathogens of aquatic organisms. The book also includes overview chapters synthesizing the ecological impact of invasive species in fresh water and summarizing practical implications for the management of rivers and other freshwater habitats.
Author | : Therese M. Poland |
Publisher | : Springer Nature |
Total Pages | : 455 |
Release | : 2021-02-01 |
Genre | : Science |
ISBN | : 3030453677 |
Download Invasive Species in Forests and Rangelands of the United States Book in PDF, ePub and Kindle
This open access book describes the serious threat of invasive species to native ecosystems. Invasive species have caused and will continue to cause enormous ecological and economic damage with ever increasing world trade. This multi-disciplinary book, written by over 100 national experts, presents the latest research on a wide range of natural science and social science fields that explore the ecology, impacts, and practical tools for management of invasive species. It covers species of all taxonomic groups from insects and pathogens, to plants, vertebrates, and aquatic organisms that impact a diversity of habitats in forests, rangelands and grasslands of the United States. It is well-illustrated, provides summaries of the most important invasive species and issues impacting all regions of the country, and includes a comprehensive primary reference list for each topic. This scientific synthesis provides the cultural, economic, scientific and social context for addressing environmental challenges posed by invasive species and will be a valuable resource for scholars, policy makers, natural resource managers and practitioners.
Author | : Julian Reynolds |
Publisher | : Cambridge University Press |
Total Pages | : 399 |
Release | : 2011-11-10 |
Genre | : Nature |
ISBN | : 1139502166 |
Download Management of Freshwater Biodiversity Book in PDF, ePub and Kindle
Integrating research into freshwater biodiversity and the role of keystone species, this fascinating book presents freshwater crayfish as representatives of human-exacerbated threats to biodiversity and conservation. It uses examples from these and other large decapod invertebrates to explore how communities function and are controlled, alongside the implications of human demands and conflicts over limited resources, notably the severe impacts on biodiversity. The discussion is structured around three key topics – the present situation of crayfish in world freshwater ecosystems, the applications of science to conservation management and knowledge transfer for successful crayfish management. It outlines the historic exploitation of crayfish, addressing the problems caused by invasive alien forms and explaining the importance of correct identification when dealing with conservation issues. Offering a global perspective on freshwater systems, the book ultimately highlights how the conservation of such large and long-lived species will help protect ecosystem quality in the future.
Author | : National Invasive Species Council (U.S.) |
Publisher | : |
Total Pages | : 78 |
Release | : 2001 |
Genre | : Biological invasions |
ISBN | : |
Download Meeting the Invasive Species Challenge Book in PDF, ePub and Kindle
Author | : Greg Sherley |
Publisher | : |
Total Pages | : 208 |
Release | : 2000 |
Genre | : Alien plants |
ISBN | : |
Download Invasive Species in the Pacific Book in PDF, ePub and Kindle
Author | : Francesca Gherardi |
Publisher | : CRC Press |
Total Pages | : 320 |
Release | : 1999-06-01 |
Genre | : Science |
ISBN | : 9789054104698 |
Download Crayfish in Europe as Alien Species Book in PDF, ePub and Kindle
From the third international workshop on the subject (U. of Florence, 1997), come 18 papers reviewing the issue of alien crayfish decimating the relatively few native species in European freshwater environments. In a historical and taxonomic context, the initial paper explains why such homogenizatio
Author | : Walter Faxon |
Publisher | : |
Total Pages | : 230 |
Release | : 1885 |
Genre | : |
ISBN | : |
Download A Revision of the Astacidae Book in PDF, ePub and Kindle
Author | : Harold Mooney |
Publisher | : Univ of California Press |
Total Pages | : 1008 |
Release | : 2016-01-19 |
Genre | : Nature |
ISBN | : 0520278801 |
Download Ecosystems of California Book in PDF, ePub and Kindle
This long-anticipated reference and sourcebook for CaliforniaÕs remarkable ecological abundance provides an integrated assessment of each major ecosystem typeÑits distribution, structure, function, and management. A comprehensive synthesis of our knowledge about this biologically diverse state, Ecosystems of California covers the state from oceans to mountaintops using multiple lenses: past and present, flora and fauna, aquatic and terrestrial, natural and managed. Each chapter evaluates natural processes for a specific ecosystem, describes drivers of change, and discusses how that ecosystem may be altered in the future. This book also explores the drivers of CaliforniaÕs ecological patterns and the history of the stateÕs various ecosystems, outlining how the challenges of climate change and invasive species and opportunities for regulation and stewardship could potentially affect the stateÕs ecosystems. The text explicitly incorporates both human impacts and conservation and restoration efforts and shows how ecosystems support human well-being. Edited by two esteemed ecosystem ecologists and with overviews by leading experts on each ecosystem, this definitive work will be indispensable for natural resource management and conservation professionals as well as for undergraduate or graduate students of CaliforniaÕs environment and curious naturalists.