Download or read book Effects of Weather and Parasitic Insects on Summer Ecology of Caribou of the Delta Herd written by Frank Matthias Mörschel and published by . This book was released on 1996 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Animals Influence on the Landscape and Ecological Importance written by Friedrich-Karl Holtmeier and published by Springer. This book was released on 2014-10-22 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: In its first English-language edition, this book introduces the many-faceted interactions of animal populations with their habitats. From soil fauna, ants and termites to small and large herbivores, burrowing mammals and birds, the author presents a comprehensive analysis of animals and ecosystems that is as broad and varied as all nature. Chapter 2 addresses the functional role of animals in landscape ecosystems, emphasizing fluxes of energy and matter within and between ecosystems, and the effects of animals on qualitative and structural habitat change. Discussion includes chapters on the role of animal population density and the impacts of native herbivores on vegetation and habitats from the tropics to the polar regions. Cyclic mass outbreaks of species such as the larch bud moth in Switzerland, the mountain pine beetle and the African red-billed weaver bird are described and analyzed. Other chapters discuss Zoochory – the dispersal of seeds by ants, mammals and birds – and the influence of burrowing animals on soil development and geomorphology. Consideration extends to the impact of feral domestic animals. Chapter 5 focuses on problems resulting from introduction of alien animals and from re-introduction of animal species to their original habitats, discusses the effects on ecosystems of burrowing, digging and trampling by animals. The author also addresses keystone species such as kangaroo rats, termites and beavers. Chapter 6 addresses the role of animals in landscape management and nature conservation, with chapters on the impact of newcomer species such as animals introduced into Australia, New Zealand and Europe, and the consequences of reintroduction of species to original habitat. It also discusses the carrying capacity of natural habit, public attitudes toward conversation and more. The final section ponders the effects of climate on interactions between animals and their habitats.

Download or read book Weather based Indices of Parasitic Fly Activity and Abundance for the Bathurst Caribou Post calving and Summer Range written by Leslie Witter and published by . This book was released on 2014 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The effects of climate change are occurring at an accelerated rate in the Arctic, with a warming of 4-7°C predicted over the coming century (ACIA 2004). Insect harassment is thought to be one of the most important causal links between warm summer temperatures and reduced body condition in caribou and reindeer (Rangifer tarandus) (Weladji et al. 2003); however, there is a paucity of information describing regional variation and the effects of changing environmental conditions on the activity and abundance of parasitic insects in the central Arctic. To gain a better understanding of insect-weather relationships on the post-calving/summer range of the Bathurst barren-ground caribou (Rangifer tarandus groenlandicus) herd, we recorded weather conditions and used carbon dioxide baited traps to monitor insect activity during 2007-2009. We used these data to generate indices representative of the activity levels of mosquitoes, black flies, and oestrid flies. Here, we describe the data requirements and calculations for generating the indices, as well as some perspective on the interpretation and application of the model predictions for future use. A full accounting of the methods and interpretation of the indices can be found in Witter (2010). This guidance is intended for biologists interested in monitoring current trends or predicting future levels of insect activity on the post-calving/summer range of the Bathurst caribou herd"--Page ii.

Download or read book Canadian Journal of Zoology written by and published by . This book was released on 2013-07 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Regulating and Limiting Factors in the Delta Caribou Herd written by and published by . This book was released on 1997 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Ungulate Ecology written by R. Terry Bowyer and published by Frontiers Media SA. This book was released on 2021-06-28 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Climate and Caribou written by Elizabeth A. Lenart and published by . This book was released on 1997 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Weather on Caribou Forage Productivity and Nutrition Within the Range of the Chisana Herd written by Elizabeth A. Lenart and published by . This book was released on 1997 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Escaping From Predators written by William E. Cooper, Jr and published by Cambridge University Press. This book was released on 2015-05-28 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: When a predator attacks, prey are faced with a series of 'if', 'when' and 'how' escape decisions – these critical questions are the foci of this book. Cooper and Blumstein bring together a balance of theory and empirical research to summarise over fifty years of scattered research and benchmark current thinking in the rapidly expanding literature on the behavioural ecology of escaping. The book consolidates current and new behaviour models with taxonomically divided empirical chapters that demonstrate the application of escape theory to different groups. The chapters integrate behaviour with physiology, genetics and evolution to lead the reader through the complex decisions faced by prey during a predator attack, examining how these decisions interact with life history and individual variation. The chapter on best practice field methodology and the ideas for future research presented throughout, ensure this volume is practical as well as informative.

Download or read book Entomology Abstracts written by and published by . This book was released on 1998 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cumulative Environmental Effects of Oil and Gas Activities on Alaska s North Slope written by National Research Council and published by National Academies Press. This book was released on 2003-10-04 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book identifies accumulated environmental, social and economic effects of oil and gas leasing, exploration, and production on Alaska's North Slope. Economic benefits to the region have been accompanied by effects of the roads, infrastructure and activies of oil and gas production on the terrain, plants, animals and peoples of the North Slope. While attempts by the oil industry and regulatory agencies have reduced many of the environmental effects, they have not been eliminated. The book makes recommendations for further environmental research related to environmental effects.

Download or read book Interrelationships Between Weather Parasitic Insects and Barren ground Caribou Rangifer Tarandus Groenlandicus Behaviour in Northwest Territories and Nunavut written by Leslie A. Witter and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Bathurst barren-ground caribou (Rangifer tarandus groenlandicus) herd decreased by 90% from 1986-2009. Increased intensity of insect harassment due to climatic warming is hypothesized as a factor contributing to the decline. I monitored weather, trapped insects, and recorded caribou behavior during 2007-2009. Oestrid fly (Oestridae) presence, and mosquito (Culicidae) and black fly (Simuliidae) activity/abundance were best explained by temperature, wind speed, light intensity, barometric pressure, relative humidity, vegetation, topography, and location. Time of day and growing degree days also affected mosquito and black fly levels. Conditions favouring mosquito activity declined, while those favouring black and oestrid fly activity increased since the mid 1980s. Mosquitoes had relatively little effect on caribou behavior. Insect avoidance increased when oestrids were present or black flies were active at moderate-high levels. Understanding differential effects of macroparasites on Rangifer behavior is necessary to predict herd dynamics in the context of a changing climate across northern Canada."--P.ii.

Download or read book Annales zoologici Fennici written by and published by . This book was released on 2007 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Animal Behaviour Abstracts written by and published by . This book was released on 1999 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Summer Ecology of the Porcupine Caribou Herd written by Donald Edmund Russell and published by . This book was released on 2002 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Backpacker written by and published by . This book was released on 2007-09 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Backpacker brings the outdoors straight to the reader's doorstep, inspiring and enabling them to go more places and enjoy nature more often. The authority on active adventure, Backpacker is the world's first GPS-enabled magazine, and the only magazine whose editors personally test the hiking trails, camping gear, and survival tips they publish. Backpacker's Editors' Choice Awards, an industry honor recognizing design, feature and product innovation, has become the gold standard against which all other outdoor-industry awards are measured.

Download or read book Abrupt Climate Change written by National Research Council and published by National Academies Press. This book was released on 2002-04-23 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: The climate record for the past 100,000 years clearly indicates that the climate system has undergone periodic-and often extreme-shifts, sometimes in as little as a decade or less. The causes of abrupt climate changes have not been clearly established, but the triggering of events is likely to be the result of multiple natural processes. Abrupt climate changes of the magnitude seen in the past would have far-reaching implications for human society and ecosystems, including major impacts on energy consumption and water supply demands. Could such a change happen again? Are human activities exacerbating the likelihood of abrupt climate change? What are the potential societal consequences of such a change? Abrupt Climate Change: Inevitable Surprises looks at the current scientific evidence and theoretical understanding to describe what is currently known about abrupt climate change, including patterns and magnitudes, mechanisms, and probability of occurrence. It identifies critical knowledge gaps concerning the potential for future abrupt changes, including those aspects of change most important to society and economies, and outlines a research strategy to close those gaps. Based on the best and most current research available, this book surveys the history of climate change and makes a series of specific recommendations for the future.