The Effects of Vegetation, Fire and Other Disturbance Factors on Small Mammal Ecology and Conservation PDF Download
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Author: Barbara Anne Wilson
Publisher:
ISBN:
Category : Fire ecology
Languages : en
Pages : 654
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Book Description
Author: Barbara Anne Wilson
Publisher:
ISBN:
Category : Fire ecology
Languages : en
Pages : 654
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Book Description
Author: Catherine H. Ream
Publisher:
ISBN:
Category : Fire ecology
Languages : en
Pages : 260
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Author:
Publisher:
ISBN:
Category : Animal ecology
Languages : en
Pages : 92
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Book Description
Author:
Publisher:
ISBN:
Category : Fire ecology
Languages : en
Pages : 112
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Book Description
Author:
Publisher:
ISBN:
Category : Natural history
Languages : en
Pages : 52
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Book Description
Author: Daniel Lee Schmoldt
Publisher: DIANE Publishing
ISBN:
Category : Nature
Languages : en
Pages : 112
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Book Description
A team of fire scientists & resource managers convened to assess the effects of fire disturbance on ecosystems. Objectives of this workshop were to develop scientific recommendations for future fire research & management activities. These included a series of numerically ranked scientific & managerial questions & responses focusing on (1) links among fire effects, fuels, & climate; (2) fire as a large-scale disturbance; (3) fire-effects modeling structures; & (4) managerial concerns, applications, & decision support. The priority issues & approaches described here provide a template for fire science & fire management programs in the next decade & beyond.
Author: Juliet C. Stromberg
Publisher: University of Arizona Press
ISBN: 9780816527526
Category : Science
Languages : en
Pages : 552
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Book Description
contributors - biologists, ecologists, geomorphologists, historians, hydrologists, lawyers, and political scientists - weave together threads from their diverse perspectives to reveal the processes that shape the past, present, and future of the San Pedro's riparian and aquatic ecosystems. They review the biological communities of the San Pedro and the stream hydrology and geomorphology that affects its riparian biota. They then look at conservation and management challenges along three sections of the San Pedro, from its headwaters in Mexico in its confluence with the Gila River, describing legal and policy issues and their interface with science; activities related to mitigation, conservation, and restoration; and a prognosis of the potential for sustaining the basin's riparian system." "Complemented by a foreword written by James Shuttleworth, these chapters demonstrate the complexity of the San Pedro's ecological and hydrological conditions, showing that there are no easy --
Author: L. Jack Lyon
Publisher: CreateSpace
ISBN: 9781480198968
Category :
Languages : en
Pages : 90
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Book Description
Fire regimes-that is, patterns of fire occurrence, size, uniformity, and severity-have been a major force shaping landscape patterns and influencing productivity throughout North America for thousands of years. Faunal communities have evolved in the context of particular fire regimes and show patterns of response to fire itself and to the changes in vegetation composition and structure that follow fire. Animals' immediate responses to fire are influenced by fire season, intensity, severity, rate of spread, uniformity, and size. Responses may include injury, mortality, immigration, or emigration. Animals with limited mobility, such as young, are more vulnerable to injury and mortality than mature animals. The habitat changes caused by fire influence faunal populations and communities much more profoundly than fire itself. Fires often cause a short-term increase in productivity, availability, or nutrient content of forage and browse. Fires generally favor raptors by reducing hiding cover and exposing prey. Small carnivores respond to fire effects on small mammal populations (either positive or negative). Large carnivores and omnivores are opportunistic species with large home ranges. Their populations change little in response to fire, but they tend to thrive in areas where their preferred prey is most plentiful-often in recent burns. In forests and woodlands, understory fires generally alter habitat structure less than mixed severity and stand-replacement fires, and their effects on animal populations are correspondingly less dramatic. Stand-replacing fires reduce habitat quality for species that require dense cover and improve it for species that prefer open sites. Population explosions of wood-boring insects, an important food source for insect predators and insect-eating birds, can be associated with fire-killed trees. Woodpecker populations generally increase after mixed-severity and stand-replacement fire if snags are available for nesting. Secondary cavity nesters, both birds and mammals, take advantage of the nest sites prepared by primary excavators. Many animal-fire studies depict a reorganization of animal communities in response to fire, with increases in some species accompanied by decreases in others. Like fire effects on populations, fire effects on communities are related to the amount of structural change in vegetation. Bird abundance and diversity are likely to be greatest early in succession. When shrub or tree canopy closure occurs, species that prefer open sites and habitat edges decline and species that prefer mature structures increase. Major changes to fire regimes alter landscape patterns, processes, and functional linkages. These changes can affect animal habitat and often produce major changes in the composition of faunal communities. In many Western ecosystems, landscape changes due to fire exclusion have changed fuel quantities and arrangement, increasing the likelihood of large or severe fires, or both. Where fire exclusion has changed species composition and fuel arrays over large areas, subsequent fires without prior fuel modification are unlikely to restore presettlement vegetation and habitat. In many desert and semi desert habitats where fire historically burned infrequently because of sparse fuels, invasion of weedy species has changed the vegetation so that burns occur much more frequently. Many animals in these ecosystems are poorly adapted to avoid fire or use resources in postfire communities. Collaboration among managers, researchers, and the public is needed to address tradeoffs in fire management, and fire management must be better integrated with overall land management objectives to address the potential interactions of fire with other disturbances such as grazing, flood, wind throw, and insect and fungus infestations.
Author: Mark Cochrane
Publisher: Springer Science & Business Media
ISBN: 3540773819
Category : Science
Languages : en
Pages : 696
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Book Description
The tropics are home to most of the world’s biodiversity and are currently the frontier for human settlement. Tropical ecosystems are being converted to agricultural and other land uses at unprecedented rates. Land conversion and maintenance almost always rely on fire and, because of this, fire is now more prevalent in the tropics than anywhere else on Earth. Despite pervasive fire, human settlement and threatened biodiversity, there is little comprehensive information available on fire and its effects in tropical ecosystems. Tropical deforestation, especially in rainforests, has been widely documented for many years. Forests are cut down and allowed to dry before being burned to remove biomass and release nutrients to grow crops. However, fires do not always stop at the borders of cleared forests. Tremendously damaging fires are increasingly spreading into forests that were never evolutionarily prepared for wild fires. The largest fires on the planet in recent decades have occurred in tropical forests and burned millions of hectares in several countries. The numerous ecosystems of the tropics have differing levels of fire resistance, resilience or dependence. At present, there is little appreciation of the seriousness of the wild fire situation in tropical rainforests but there is even less understanding of the role that fire plays in the ecology of many fire adapted tropical ecosystems, such as savannas, grasslands and other forest types.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 108
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Book Description
It has been suggested that timber harvest practices that mimic a natural disturbance regime will maintain forest integrity, and thus biological diversity. With this approach to forest management in mind, the research project described in this report was set up to gather relevant data on natural disturbance regimes in boreal mixedwood forests. Specific objectives were: to determine if harvest stands that follow current harvest guidelines will converge naturally with fire-disturbed stands as time from disturbance increases; and to provide guidelines, supported by research, that can be adopted in forest management based on a natural disturbance regime. Project results are reported in two main sections with regard to studies carried out in three age-classes of white spruce dominated boreal forest near Manning, Alberta. The first compares vegetation structure between harvest- and fire-disturbed stands and the second compares bird & small mammal diversity in the two kinds of stands. Each section provides specific harvest guidelines based on approximating a naturally-disturbed forest stand.
