نتایج جستجو برای: shrub canopy

تعداد نتایج: 19636  

2017
Nancy F. Glenn Christopher J. Tennant Adrian A. Harpold Kathleen Ann Lohse Sarah E. Godsey Benjamin T. Crosby Laurel G. Larsen Paul D. Brooks Robert W. Van Kirk

In mountains with seasonal snow cover, the effects of climate change on snowpack will be constrained by landscape-vegetation interactions with the atmosphere. Airborne lidar surveys used to estimate snow depth, topography, and vegetation were coupled with reanalysis climate products to quantify these interactions and to highlight potential snowpack sensitivities to climate and vegetation change...

2015
Dávid Bogyó Tibor Magura Dávid D. Nagy Béla Tóthmérész

We studied the distribution of millipedes in a forest interior-forest edge-grassland habitat complex in the Hajdúság Landscape Protection Area (NE Hungary). The habitat types were as follows: (1) lowland oak forest, (2) forest edge with increased ground vegetation and shrub cover, and (3) mesophilous grassland. We collected millipedes by litter and soil sifting. There were overall 30 sifted lit...

2004
Becky K. Kerns Janet L. Ohmann

We used data from regional forest inventories and research programs, coupled with mapped climatic and topographic information, to explore relationships and develop multiple linear regression (MLR) and regression tree models for total and deciduous shrub cover in the Oregon coastal province. Results from both types of models indicate that forest structure variables were most important for explai...

Journal: : 2021

Adverse soil and environmental factors cause a decrease in pasture yield our country. Shrub species are given importance breeding studies carried out order to increase the marginal pastures world. Forage kochia (Kochia prostrata), which is naturally growing semi-shrub Turkey's flora, shows tolerance adverse climatic conditions. This research was established Konya October 2017 according Randomiz...

2008
RobeRt J. Smith

Long-term datasets reveal declines in many populations of landbird migrants, with declines especially evident in shrub-nesting species. Moreover, transitional shrub-dominated habitats are becoming scarce, reducing breeding habitat for these species. Because migrants often occupy habitats en route similar to those used in the breeding season, the persistence of shrub-dominated habitats may be es...

2009
Jonathan R. Thompson Thomas A. Spies

The 2002 Biscuit Fire burned through more than 200,000 ha of mixed-conifer/evergreen hardwood forests in southwestern Oregon and northwestern California. The size of the fire and the diversity of conditions through which it burned provided an opportunity to analyze relationships between crown damage and vegetation type, recent fire history, geology, topography, and regional weather conditions o...

2012
Joel B. Sankey Sujith Ravi Cynthia S. A. Wallace Robert H. Webb Travis E. Huxman

[1] Woody plant encroachment, a worldwide phenomenon, is a major driver of land degradation in desert grasslands. Woody plant encroachment by shrub functional types ultimately leads to the formation of a patchy landscape with fertile shrub patches interspaced with nutrient-depleted bare soil patches. This is considered to be an irreversible process of land and soil degradation. Recent studies h...

2017
Mariska te Beest Judith Sitters Cécile B Ménard Johan Olofsson

Previous studies have shown that climate warming is causing shrub cover to increase at high latitudes. Increased shrub cover generally lowers surface albedo, which results in higher energy absorption and further warming. In parts of Fennoscandia, herbivory is known to control vegetation height and abundance, and thus preventing this positive feedback. Here, we combine field measurements of albe...

2017
Jesse Minor Donald A. Falk Greg A. Barron-Gafford

Climate change is increasing the frequency and extent of high-severity disturbance, with potential to alter vegetation community composition and structure in environments sensitive to tipping points between alternative states. Shrub species display a range of characteristics that promote resistance and resilience to disturbance, and which yield differential post-disturbance outcomes. We investi...

2014
Andrew J. Kroll Jay E. Jones Jack Giovanini Roger W. Perry Ronald E. Thill

As human demand for ecosystem products increases, managers of landscapes used for commodity production require information about effects of management regimes on biological diversity. Landscape attributes, however, may moderate ecological responses to local-scale conservation and management actions. As a result, uniform application of local management prescriptions may yield variable biodiversi...

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