Download or read book Second Year Response of Plant Communities written by J. M. Kranabetter and published by . This book was released on 1999 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Disturbance Ecology written by Edward A. Johnson and published by Academic Press. This book was released on 2020-10-21 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Disturbance ecology continues to be an active area of research, having undergone advances in many areas in recent years. One emerging direction is the increased coupling of physical and ecological processes, in which disturbances are increasingly traced back to mechanisms that cause the disturbances themselves, such as earth surface processes, mesoscale, and larger meteorological processes, and the ecological effects of interest are increasingly physiological. Plant Disturbance Ecology, 2nd Edition encourages movement away from the informal, conceptual approach traditionally used in defining natural disturbances and clearly presents how scientists can use a multitude of approaches in plant disturbance ecology. This edition includes nine revised chapters from the first edition, as well new, more comprehensive chapters on fire disturbance and beaver disturbance. Edited by leading experts in the field, Plant Disturbance Ecology, 2nd Edition is an essential resource for scientists interested in understanding plant disturbance and ecological processes. Advances understanding of natural disturbances by combining geophysical and ecological processes Provides a framework for collaboration between geophysical scientists and ecologists studying natural disturbances Includes fully updated research with 5 new chapters and revision of 11 chapters from the first edition
Download or read book Responses of Plant Communities to Grazing in the Southwestern United States written by Daniel G. Milchunas and published by . This book was released on 2006 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grazing by wild and domestic mammals can have small to large effects on plant communities, depending on characteristics of the particular community and of the type and intensity of grazing. The broad objective of this report was to extensively review literature on the effects of grazing on 25 plant communities of the southwestern U.S. in terms of plant species composition, aboveground primary productivity, and root and soil attributes. Livestock grazing management and grazing systems are assessed, as are effects of small and large native mammals and feral species, when data are available. Emphasis is placed on the evolutionary history of grazing and productivity of the particular communities as determinants of response. After reviewing available studies for each community type, we compare changes in species composition with grazing among community types. Comparisons are also made between southwestern communities with a relatively short history of grazing and communities of the adjacent Great Plains with a long evolutionary history of grazing. Evidence for grazing as a factor in shifts from grasslands to shrublands is considered. An appendix outlines a new community classification system, which is followed in describing grazing impacts in prior sections.
Download or read book Responses of Plant Communities to Grazing in the Southwestern United States written by Daniel G. Milchunas and published by . This book was released on 2006 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Nature of Plant Communities written by J. Bastow Wilson and published by Cambridge University Press. This book was released on 2019-03-21 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a comprehensive review of the role of species interactions in the process of plant community assembly.
Download or read book Response of Native Plant Communities One Year After Herbicide Treatment Mowing Or Burning in Powerline Rights of way written by Joseph Eugene Settles and published by . This book was released on 2000 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Positive Interactions and Interdependence in Plant Communities written by Ragan M. Callaway and published by Springer Science & Business Media. This book was released on 2007-08-28 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book marshals ecological literature from the last century on facilitation to make the case against the widely accepted individualistic notion of community organization. It examines the idea that positive interactions are more prevalent in physically stressful conditions. Coverage also includes species specificity in facilitative interactions, indirect facilitative interactions, and potential evolutionary aspects of positive interactions.
Download or read book Plant Communities written by Warren Gookin Waterman and published by . This book was released on 1928 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Old field Community Response to Multiple Interacting Factors of Global Change written by Elizabeth Cayenne Engel and published by . This book was released on 2005 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Communities are structured by many factors including abiotic factors such as resource availability, and biotic interactions. Climatic and atmospheric change will affect the composition of plant communities through multiple interacting biotic and abiotic factors. Literature on the effects of single factors on plant communities is abundant yet there have been few experiments examining the effects of multiple abiotic factors associated with climate change. Moreover, plant communities are not controlled solely by environmental conditions, but by biotic interactions such as competition and facilitation. In this thesis, I used a field experiment to examine the effects of elevated [CO2], warming, and soil moisture on in-situ old-field plant communities (Chapter 2). In addition, I conducted a separate field experiment to examine the competitive relationships among the constituent species to test whether an experimentally derived competitive hierarchy can predict relative abundances of species within plant communities (Chapter 3). I examined plant community responses to treatments of elevated [CO2] (+300 ppm), warming (+3 degrees C), and soil moisture availability applied to experimental plots within open-top chambers at Oak Ridge National Laboratory. In 2002, we constructed plots with plant communities consisting of seven common old-field species, including grasses, forbs, and legumes. Beginning in 2003, we tracked foliar cover, density and recruitment, and reproductive phenology for each plant species, and determined changes in community diversity and evenness over the course of two growing seasons. We observed few interactive effects of treatments on plant abundance. Most of the observed plant responses to treatments were responses to single factors. Species-specific foliar cover was most strongly influenced by warming: warming reduced foliar cover of Trifolium pratense and Dactylis glomerata, but increased foliar cover of Andropogon virginicus and Solidgao canadensis. Foliar cover of Dactylis glomerata was lower in dry plots than in wet plots. During the second full growing season, plant species diversity, evenness, and richness were at least 10% lower in wet plots, where total foliar cover and dominance were greater than in dry plots. Interactive effects of treatments appeared only toward the end of the second growing season. For example, late in the growing season of 2004, cover of Dactylis was four times greater within wet plots under ambient temperatures than in all other treatment combinations (temperature x water interaction; P less than 0.02).
Download or read book The Study of Plant Communities written by Henry John Oosting and published by . This book was released on 1956 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Resource added for the Landscape Horticulture Technician program 100014.
Download or read book Proceedings of the Tenth Biennial Southern Silvicultural Research Conference written by James D. Haywood and published by . This book was released on 1999 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Positive Plant Interactions and Community Dynamics written by Francisco Pugnaire and published by CRC Press. This book was released on 2010-02-09 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ever since the concept of the "struggle for life" became the heart of Darwin's theory of evolution, biologists have studied the relevance of interactions for the natural history and evolution of organisms. Although positive interactions among plants have traditionally received little attention, there is now a growing body of evidence showing the ef
Download or read book Ecology and Evolution of Flowers written by Lawrence D. Harder and published by Oxford University Press, USA. This book was released on 2006-11-30 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Floral biology, floral function, sexual systems, diversification.
Download or read book Helena National Forest N F Lincoln Ranger District Nevada Dalton Project written by and published by . This book was released on 1999 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Communities and Their Environment written by Manuel Oliveira and published by BoD – Books on Demand. This book was released on 2020-09-09 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents different perspectives on how to understand the complex interaction between plants and the environment. Plant communities adapt to biotic and abiotic stresses with different mechanisms and understanding these phenomena provides the means to better manage our environment and to cultivate crops that better serve our needs.
Download or read book Diversity and Eco Physiological Responses of Aquatic Plants written by Chunhua Liu and published by Frontiers Media SA. This book was released on 2020-06-16 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aquatic plants refer to a diverse group of aquatic photosynthetic organisms large enough to be seem with the naked eye, and the vegetative parts of which actively grow either permanently or periodically (for at least several weeks each year) submerged below, floating on, or growing up through the water surface. These include aquatic vascular plants, aquatic mosses and some larger algae. Aquatic plants are grouped into life forms, each of which relates differently to limiting factors and has distinct ecological functions in aquatic ecosystems. Life form groups include emergent macrophytes (plants that are rooted in sediment or soils that are periodically inundated, with all other structures extending into the air), floating-leaved macrophytes (rooted plants with leaves that float on the water surface), submersed macrophytes (rooted plants growing completely submerged), free submerged macrophytes (which are not rooted but attached to other macrophytes or submerged structures) and free-floating macrophytes (plants that float on the water surface). Aquatic plants play an important role in the structure and function of aquatic ecosystems by altering water movement regimes, providing shelter and refuge and serving as a food source. In addition, aquatic plants produce large standing crops which can also stabilize sediments, accumulate large amounts of nutrients thus improving water healthy. Thus, because of their ecological role, aquatic plants are an important component of aquatic ecosystems. Aquatic plants are very vulnerable to human activities and global changes, and many species of the plants had become endangered in the past several decades due to habitat loss, flooding, damming, over foraging, biological invasion and eutrophication, which might not be halted but enforced in the future when more extreme weathers coincide with enhanced human activities.
Download or read book Plant Community and Environmental Change written by Jonathan Henn and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the forces that govern plant community structure, function, and response to change is a central question in ecology. Theory predicts that plant communities assemble as a result of a species ability to disperse, tolerate the environment, and interact with other organisms. Recently, there has been a strong focus on predicting the success of species within communities based on their ability to disperse, tolerate stress, successfully compete, and survive as measured by their phenotypic and functional characteristics, or "traits". In an era of global change, trait-based ecology offers the promise of predicting community responses without studying each species individually. The aim of my dissertation is to understand how plant traits mediate species responses to climate change, species introductions, disturbance regimes, and habitat loss and fragmentation. My first chapter describes how functional traits of native and non-native plants differ and how environmental gradients affect these differences. Theory predicts that differences in species should affect the extent to which native and non-native species compete and fill different niches, both of which can be mechanisms of invasion. I considered both intra- and interspecific variation in traits across a strong natural environmental climate gradient in Hawaii. Non-native species have different characteristics than native species overall, but these differences are minimized in cool, wet conditions. This suggests that native and non-native species compete more strongly in cool, wet conditions and that invaders in hot, dry conditions are filling different niches. My second chapter asks how ontogeny affects commonly measured plant functional traits. Using a greenhouse experiment with eight common prairie perennial plants, I measured traits every two weeks throughout the growing season to investigate how much within-species variation in phenotype is due to age alone. My findings demonstrate that plant traits do change through time with the fastest changes occurring in younger plants. As plants age, they generally shift from acquisitive resource-use strategies to conservative resource-use strategies, however, faster-growing species change more than slower-growing species. Since most trait-based studies rely on functional traits measured from adult plants, my results suggest that it may be important to also incorporate traits of younger individuals, especially when evaluating assembling communities. My third chapter investigates plant strategies for early spring survival and growth following disturbance by fire in tallgrass prairie. I measured cold tolerance and specific leaf area (leaf carbon content) as metrics of stress tolerance and leaf area as a metric of growth to determine how plant strategies change through time and whether there are tradeoffs between growth and tolerance. Disturbance timing affects tolerance traits such that fall burns promote more tolerant leaves early in the spring while spring burns promote more tolerant leaves late in the season. There is weak evidence for a tradeoff where increased tolerance results in a reduction in growth. Overall, these results suggest that plants exhibit strategies for spring survival and growth that vary from cold avoidance with rapid growth to cold tolerance with slower growth. My fourth chapter explores how disturbance and winter climate change interact to affect prairie plant growth, phenology, and community composition. I established a three-year field experiment that manipulates fire timing and winter snow depth in restored prairies. Plots that have reduced snow and that are burned in the fall have substantially colder winter soil temperatures and thaw earlier in spring. The disturbance treatments change the magnitude and direction of response to snow depth treatments for most species and have species-specific effects on plant growth and phenology. These results provide clear evidence that disturbance regimes can set the stage for climate change responses in grassland plant communities.
