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Author : James D. Haywood
Publisher : Unknown
Page : 8 pages
File Size : 42,6 Mb
Release : 1995
Category : Prescribed burning
ISBN : MINN:31951D02960963O
Author : Anonim
Publisher : Unknown
Page : 246 pages
File Size : 46,6 Mb
Release : 1976
Category : Forests and forestry
ISBN : UCBK:C069113451
Author : James D. Haywood
Publisher : Unknown
Page : 8 pages
File Size : 48,6 Mb
Release : 1995
Category : Forest soils
ISBN : MINN:31951D02960968E
Author : Anonim
Publisher : Unknown
Page : 1922 pages
File Size : 54,6 Mb
Release : 1975
Category : Agriculture
ISBN : OSU:32435058554528
Author : Heather E. Erickson,Rachel White
Publisher : Unknown
Page : 24 pages
File Size : 42,7 Mb
Release : 2008
Category : Fire ecology
ISBN : MINN:31951D02938273R
Soils are fundamental to a healthy and functioning ecosystem. Therefore, forest land managers can greatly benefit from a more thorough understanding of the ecological impacts of fire and fuel management activities on the vital services soils provide. We present a summary of new research on fire effects and soils made possible through the Joint Fire Science Program and highlight management implications where applicable. Some responses were consistent across sites, whereas others were unique and may not easily be extrapolated to other sites. Selected findings include (1) postfire soil water repellency is most likely to occur in areas of high burn severity and is closely related to surface vegetation; (2) although wildfire has the potential to decrease the amount of carbon stored in soils, major changes in land use, such as conversion from forest to grasslands, present a much greater threat to carbon storage; (3) prescribed fires, which tend to burn less severely than wildfires and oftentimes have minor effects on soils, may nonetheless decrease species richness of certain types of fungi; and (4) early season prescribed burns tend to have less impact than late season burns on soil organisms, soil carbon, and other soil properties.
Author : Anonim
Publisher : Unknown
Page : 324 pages
File Size : 41,5 Mb
Release : 1990
Category : Soil surveys
ISBN : UCR:31210008327353
Author : P. T. M. Cunningham
Publisher : Unknown
Page : 106 pages
File Size : 52,6 Mb
Release : 1978
Category : Electronic
ISBN : OCLC:709939883
Ctenosciaena gracilicirrhus é uma espécie de peixe marinho demersal, da família Sciaenidae. Os exemplares estudados foram coletados pelo N/Oc. "Prof. W. Besnard", durante quatro cruzeiros oceanográficos, realizados durante o ano de 1975, sobre a plataforma continental brasileira entre as latitudes de 22°10'S e 30°S, uma em cada estação do ano. Em decorrência da elevada abundância numérica da espécie na ictiofauna de fundo da costa centro-sul do Brasil, estudaram-se a bionomia e biologia, sendo que no total foram capturados 11.995 exemplares, utilizando-se rede de arrasto de fundo. Entre 22°27'S e 29°35'S não havia sido assinalada a ocorrência de C. gracilicirrhus. A amplitude de variação de comprimento total dos indivíduos oscilou entre 30 e 200 mm, sendo que as modas que se destacaram foram as das classes de 80 e 150 mm, para o período global. O recrutamento ocorreu no inverno-primavera-verão com um máximo na primavera. O processo da primeira maturação sexual inciou-se quando as fêmeas apresentavam um comprimento médio total de 113,5 mm e os machos de 107,0 mm, estando no primeiro ano de vida. E o processo de maturação sexual se completava quando as fêmeas alcançavam 165,0 mm de comprimento médio total e os machos com 170,0 mm.
Author : A Cerda
Publisher : CRC Press
Page : 605 pages
File Size : 46,6 Mb
Release : 2009-01-05
Category : Technology & Engineering
ISBN : 1439843333
This book has been published a decade after Fires Effects on Ecosystems by DeBano, Neary, and Folliott (1998), and builds on their foundation to update knowledge on natural post-fire processes and describe the use and effectiveness of various restoration strategies that may be applied when human intervention is warranted. The chapters in this book, written by leading scientists, have been compiled to provide relevant and accessible information to students, land managers, and policy-makers as well as other scientists.
Author : Tina V. Boucher
Publisher : Unknown
Page : 68 pages
File Size : 46,9 Mb
Release : 2003
Category : Plant communities
ISBN : MINN:31951D02977791M
Between 1977 and 1997, 4000 ha were burned to promote regeneration of tree and shrub species used for browse by moose (Alces alces) in the Kenai Mountains. Species composition was documented along burned and unburned transects at 17 prescribed burn sites. Relationships among initial vegetation composition, physical site characteristics, browse species abundance, and competitive herbaceous vegetation were examined to determine controls on browse species regeneration after prescribed burning. Browse species abundance after burning was inversely related to Calamagrostis canadensis Michx. Beauv. (bluejoint reedgrass) abundance prior to burning. Calamagrostis canadensis abundance was related to specific landscape characteristics. Depositional slopes, such as fluvial valley bottoms and toe slopes, often featured soils with deep, loamy surface horizons. Sites with these characteristics generally showed large increases in C. canadensis cover after prescribed burning, even when C. canadensis was a low percentage (3 percent) of the canopy cover prior to burning. The most important preburn variables for predicting postburn browse species abundance were preburn C. canadensis cover and the type of surficial deposit. Site conditions that are favorable to C. canadensis may be problematic for successful regeneration of browse species, especially if browse species are not present in the initial composition.
Author : Anonim
Publisher : Unknown
Page : 240 pages
File Size : 46,7 Mb
Release : 1990
Category : Soil surveys
ISBN : UOM:39015018210586
Author : Anonim
Publisher : Unknown
Page : 326 pages
File Size : 54,5 Mb
Release : 1999
Category : Electronic
ISBN : NWU:35556031873581
Author : P. George Martin
Publisher : Unknown
Page : 268 pages
File Size : 42,9 Mb
Release : 1991
Category : Soil surveys
ISBN : UCR:31210008431312
Author : William H Boyd
Publisher : Unknown
Page : 248 pages
File Size : 40,9 Mb
Release : 1990
Category : Soil surveys
ISBN : UCSD:31822005043682
Author : William H. Boyd
Publisher : Unknown
Page : 270 pages
File Size : 46,5 Mb
Release : 1986
Category : Soil surveys
ISBN : UCSD:31822008997926
Author : E. Thurman Allen
Publisher : Unknown
Page : 262 pages
File Size : 46,5 Mb
Release : 1993
Category : Soil surveys
ISBN : UCSD:31822007585953