Download or read book Rangeland Plant Response to Elevated CO2 Annual Report 1991 written by and published by . This book was released on 1991 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effects of carbon dioxide enrichment on a tallgrass ecosystem were monitored during the 1990 growing season. The chambers, CO2 delivery system, and data acquisition and control system were in place and operational by 4 April 1990. CO2 fumigation and data acquisition began on that date. Nitrogen fertilizer as ammonium nitrate was applied at a rate of 45 kg ha −1 on 1 April to the N-fertilized plots. The chambers were 4.5 m in diameter and 4 m in height to allow for destructive sampling for biomass accumulation, leaf area determination, and for grazing esophageally-fistulated sheep. The experimental site was located in pristine Tallgrass Prairie north of/and adjacent to the Kansas State University campus. Vegetation on the site was a mixture of C3 and C4 species and was dominated by big bluestem (Andropogon geradii vitman) and indiangrass (Sorghastrum nutans (L.) Nash). Subdominants included Kentucky bluegrass (Poa pratensis L.), sideoats grama (Bouteloua curtipendula (Michx.) Torr.), and tall dropseed (Sporobolus asper var. asper (Michx.) Kunth). Members of the sedge family made up 5-10% of the composition. Principal forbs included western ragweed (Ambrosia psilostachya DC.), Louisiana sagewort (Artemesia ludoviciana Nutt.), and mayflower scurfpea (Psoralea tenuiflora var. floribunda (Nutt.) Rydb.). Average peak biomass occurs in early August at 425 g m−2 of which 35 g m−2 is from forbs. The area was ideal for meeting the experimental objectives, in that the mixture of C3 and C4 plants would allow for assessment of competitive relationships among numerous species of both carbon fixation pathways.
Download or read book The Mysterie of the Tvvo Ivnto s Presbyterian and Independent Or The Serpent in the Bosome written by Clement Walker and published by . This book was released on 1647 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rangeland Plant Response to Elevated CO2 Progress Report 1993 written by and published by . This book was released on 1993 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plots of a tallgrass prairie ecosystem were exposed to ambient and twice-ambient CO2 concentrations in open-top chambers and compared to unchambered ambient CO2 plots during the entire growing season from 1989 through 1992. Relative root production among treatments was estimated using root ingrowth bags which remained in place throughout the growing season. Latent heat flux was simulated with and without water stress. Botanical composition was estimated annuallyin all treatments. Open-top chambers appeared to reduce latent heat flux and increase water use efficiency similar to elevated CO2 when water stress was not severe, but under severe water stress, chamber effect on water use efficiency was limited. In natural ecosystems with periodic moisture stress, increased water use efficiency under elevated CO2 apparently would have a greater impact on productivity than photosynthetic pathway. Root ingrowth biomass was greater in 1990 and 1991 on elevated CO2 plots compared to ambient or chambered-ambient plots. In 1992, there was no difference in root ingrowth biomass among treatments.
Download or read book Rangeland plant Response to Elevated CO2 written by M. B. Kirkham and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rangeland Plant Responses to Elevated CO2 Final Report October 1988 October 1993 written by and published by . This book was released on 1997 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research is described on plant (tallgrass) response to elevated carbon dioxide. Variables addressed include biomass production, as well as water use efficiency, photosynthetic capacity, decomposition, nutrient cycling, and forage quality.
Download or read book Rangeland Plant Response to Elevated CO sub 2 Progress Report written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An experiment is being designed to examine the influence of elevating CO2 levels on tallgrass prairie rangeland. Changes in biomass production, photosynthesis rates, and species composition (C3 versus C4) over time are to be examined. This report covers the period from August 15, 1988 to January 1, 1989. During this period the authors have had planning meetings in Manhattan, KS, and Washington, DC, with various investigators of the measurement and modeling groups within the elevated CO[sub 2] program. During this period detailed discussions with regard to the methodology were carried out. In addition, short-term experiments and prototype constructions were completed to assess design and materials. Because of changes in the methodology and, to a certain degree, the scope, they are requesting changes in the funding cycle to implement the project at the beginning of the growing cycle of the tallgrass prairie.
Download or read book International Conference of Engineering Design Graphics and Descriptive Geometry written by and published by . This book was released on 1998 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General Technical Report INT written by and published by . This book was released on 1981 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A History of Atmospheric CO2 and Its Effects on Plants Animals and Ecosystems written by James R. Ehleringer and published by Springer Science & Business Media. This book was released on 2005-01-27 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trees, CO2 concentration, climate change, herbivores, temperature.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1828 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Download or read book Managing Water Resources in the West Under Conditions of Climate Uncertainty written by National Research Council and published by National Academies Press. This book was released on 1991-02-01 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: The question of whether the earth's climate is changing in some significant human-induced way remains a matter of much debate. But the fact that climate is variable over time is well known. These two elements of climatic uncertainty affect water resources planning and management in the American West. Managing Water Resources in the West Under Conditions of Climate Uncertainty examines the scientific basis for predictions of climate change, the implications of climate uncertainty for water resources management, and the management options available for responding to climate variability and potential climate change.
Download or read book Carbon Dioxide Populations and Communities written by Fakhri A. Bazzaz and published by Elsevier. This book was released on 1996-07-17 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: In past decades and in association with a continuing global industrial development, the global atmospheric concentration of carbon dioxide has been rising. Among the many predictions made concerning this disturbing trend is global warming sufficient to melt polar ice-caps thereby dramatically altering existing shorelines. This book will help fill an obvious gap in the carbon dioxide debate by substituting date for speculation.* * Includes contributions from leading authorities around the world* Serves as a companion to Carbon Dioxide and Terrestrial Ecosystems* The first book of its kind to explore evolutionary responses of both populations and communities to elevated carbon dioxide
Download or read book Carbon Dioxide and Terrestrial Ecosystems written by George W. Koch and published by Elsevier. This book was released on 1995-12-21 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of carbon dioxide extends from cellular to global levels of organization and potential ecological deterioration may be the result of increased CO2 in our atmosphere. Recently, the research emphasis shifted from studies of photosynthesis pathways and plant growth to ground-breaking studies of carbon dioxide balances in ecosystems, regions, and even the entire globe. Carbon Dioxide and Terrestrial Ecosystems addresses these new areas of research. Economically important woody ecosystems are emphasized because they have substantial influence on global carbon dioxide balances. Herbaceous ecosystems (e.g., grasslands, prairies, wetlands) and crop ecosystems are also covered. The interactions among organisms, communities, and ecosystems are modeled, and the book closes with an important synthesis of this growing nexus of research. Carbon Dioxide and Terrestrial Ecosystems is a compilation of detailed scientific studies that reveal how ecosystems generally, and particular plants specifically, respond to changed levels of carbon dioxide. - Contributions from an international team of experts - Empirical examination of the actual effects of carbon dioxide - Variety of terrestrial habitats investigated - Specific plants and whole ecosystems offered as studies
Download or read book Grasslands written by Stephen Reynolds and published by CRC Press. This book was released on 2019-05-14 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book looks at significant current grassland problems and issues, and provides an insight into grassland productivity in diverse areas of the world, with their various production systems. There is a focus on recent technical advances and the prospects for further innovation, through twenty-one chapters by eminent grassland scientists, grouped i
Download or read book General Technical Report RMRS written by and published by . This book was released on 1998 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
