نتایج جستجو برای: burned and unburned gasses

تعداد نتایج: 16827955  

Journal: :international journal of advanced biological and biomedical research 2013
abas jamshidi bakhtar khosro sagheb-talebi mohamad reza marvi mohajer maziar haidari

fire, as a natural ecological disturbance factor in forest, this study located in the marivan region, northern zagros forest, and western iranian state of kurdistan. in each burned and unburned area 30 circle sample plot (1000 m2) were collected by randomized–systematic method in the 100×200 m net (in total 60 plots). in every sample plot the kind of species, number of tree, the height of coppi...

Journal: :Journal of environmental quality 2002
Jeffrey J Whicker David D Breshears Piotr T Wasiolek Thomas B Kirchner Rebecca A Tavani David A Schoep John C Rodgers

Redistribution of soil, nutrients, and contaminants is often driven by wind erosion in semiarid shrublands. Wind erosion depends on wind velocity (particularly during episodic, high-velocity winds) and on vegetation, which is generally sparse and spatially heterogeneous in semiarid ecosystems. Further, the vegetation cover can be rapidly and greatly altered due to disturbances, particularly fir...

2000
MELANIE JONES ANNE JOHNSON-FLANAGAN STEVEN KIISKILA CHARLES BULMER

Jones, M.D., A.M. Johnson-Flanagan, S.B.R. Kiiskila, and C. Bulmer. 2000. First-season growth of lodgepole pine seedlings grown in three different container types and planted on landings, or on burned or unburned sites. In Proceedings, From science to management and back: a science forum for southern interior ecosystems of British Columbia. C. Hollstedt, K. Sutherland, and T. Innes (editors). S...

Journal: :اکو هیدرولوژی 0
خدیجه بهلکه دانشجوی کارشناسی ارشد، گروه مرتع داری، دانشکدۀ منابع طبیعی، دانشگاه تربیت مدرس، نور، ایران مهدی عابدی استادیار گروه مرتع داری، دانشکدۀ منابع طبیعی، دانشگاه تربیت مدرس، نور، ایران قاسمعلی دیانتی تیلکی دانشیار گروه مرتع داری، دانشکدۀ منابع طبیعی، دانشگاه تربیت مدرس، نور، ایران

cushions as dominant species of mountainous habitats facilitate surrounding species. the aim of this study is the investigation of fire on onobrychiscornutamicrohabitats in the mountainous grasslands. fire occurredin summer 2013. therefore, in order to study the temperature fluctuations, thermometers were established under burned and unburned patches since 15 march 2016 for 31 days (half hours ...

2005
Thomas Gardali Geoffrey R. Geupel Aaron L. Holmes

We monitored the riparian bird community for two years following the 1995 Vision Fire in the Point Reyes National Seashore (PRNS), Marin County, Cal i for nia. We compare bird and vegetation data on burned and unburned sites within PRNS and the Golden Gate National Recreation Area. Bird abundance, as indexed by fi xed-radius point counts, was higher for sev er al shrub-nesting species at burned...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2008
C F D Rocha C V Ariani V A Menezes D Vrcibradic

The area of the Dunas da Joaquina, in Santa Catarina island, contains one of the most important remnants of restinga habitat in Santa Catarina State, southern Brazil. In December 2003, a fire occurred in a portion of this area, affecting most of the vegetation, including the bromeliad community. In this study, the density of individuals and the diet composition of the bromelicolous treefrog Sci...

Abas Jamshidi Bakhtar, Khosro Sagheb-Talebi Maziar Haidari, Mohamad Reza Marvi Mohajer

Fire, as a natural ecological disturbance factor in forest, this study located in the Marivan region, Northern Zagros forest, and western Iranian state of Kurdistan. In each burned and unburned area 30 circle sample plot (1000 m2) were collected by randomized–systematic method in the 100×200 m net (in total 60 plots). In every sample plot the kind of species, number of tree, the heig...

Journal: :Journal of environmental quality 2001
M P Johansen T E Hakonson F W Whicker J R Simanton J J Stone

Infrequent, high-impact events such as wildfires, droughts, biological shifts, floods, and mechanical disturbances can greatly change land surfaces, including vegetative cover and soil characteristics, which in turn can trigger high rates of hydrologic erosion and associated transport of sediments and sediment-sorbed contaminants. Where persistent soil contamination exists, infrequent mobilizat...

2001
Mathew P. Johansen Thomas E. Hakonson David D. Breshears

Rainfall simulations allow for controlled comparisons of runoff and erosion among ecosystems and land cover conditions. Runoff and erosion can increase greatly following fire, yet there are few rainfall simulation studies for post-fire plots, particularly after severe fire in semiarid forest. We conducted rainfall simulations shortly after a severe fire (Cerro Grande) in ponderosa pine forest n...

2007
David J. Augustine Jack F. Cully Tammi L. Johnson

Factors influencing the distribution and abundance of black-tailed prairie dog (Cynomys ludovicianus) colonies are of interest to rangeland managers because of the significant influence prairie dogs can exert on both livestock and biodiversity. We examined the influence of 4 prescribed burns and one wildfire on the rate and direction of prairie dog colony expansion in shortgrass steppe of south...

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