نتایج جستجو برای: total canopy cover

تعداد نتایج: 911411  

Journal: :Remote Sensing 2018
Richard Makanza Mainassara Zaman-Allah Jill E. Cairns Cosmos Magorokosho Amsal Tarekegne Mike Olsen Boddupalli M. Prasanna

In the crop breeding process, the use of data collection methods that allow reliable assessment of crop adaptation traits, faster and cheaper than those currently in use, can significantly improve resource use efficiency by reducing selection cost and can contribute to increased genetic gain through improved selection efficiency. Current methods to estimate crop growth (ground canopy cover) and...

2008
C. Y. Lo L. C. Chen

To understand the biomass condition in the forestry areas, the detection for individual trees becomes an important topic. For forestry management, the canopy may be described with several parameters, e.g., number of stems, stand position, tree height, timber volume, canopy cover, etc. Traditional methods rely on field measurements, imagery, and radar data to derive the canopy information. Follo...

2002
D. B. LOBELL G. P. ASNER

The dependence of vegetation re ectance on sun and sensor geometry can potentially provide information on canopy properties, but also may be a source of unmodelled systematic error in single-angle remote sensing measurements. In this study, we investigated the angular variability of re ectance measurements from the NASA Airborne Visible/Infrared Imaging Spectrometer (AVIRIS), and the resultin...

2004
E B Spurr B Warburton

Stem density, basal area, vegetation cover and vegetation surface area were compared as measures of the proportions of plant species present in North Okarito Forest, South Westland, for use in determining bird preferences for plant species. In general, stem density estimates of the proportions of canopy species were about 10 times lower than basal area estimates. The converse was true for estim...

2008
L. T. Waser H. Eisenbeiss M. Kuechler E. Baltsavias

This study presents a methodology for derivation of fractional canopy cover, detection of main tree species, and extraction of forest stands using logistic regression, airborne remote sensing data and field samples. In a first step, canopy height models (CHMs) are generated using medium point density LiDAR DSM and DTM and a high-quality matching DSM. Then, fractional canopy covers are calculate...

2017
Jeremy Freeman Andrew C. Edwards Jeremy Russell-Smith

Although contemporary fire regimes in fire-prone Australian savannas are recognised as having major impacts on an array of biodiversity and environmental values, a number of studies have observed significant monsoon rainforest expansion in recent decades. Here we assess the status of a locally extensive endemic monsoon rainforest type, dominated by Allosyncarpia ternata (Myrtaceae), restricted ...

2013
Dominique Carrer Jean-Louis Roujean Sebastien Lafont Jean-Christophe Calvet

type : Poster Session : S1: Traits Submitted by : dominique carrer Authors and Speakers : Dominique Carrer Information about other authors : Dominique Carrer 1, Jean-Louis Roujean 1, Sebastien Lafont 1, and Jean-Christophe Calvet 1 1 Météo-France, CNRM/GAME, 42 avenue Gaspard Coriolis, 31057 Toulouse Cedex, France The carbon assimilation of vegetation depends on CO2 concentration, radiant solar...

2005
M. A. Nearing V. Jetten C. Baffaut O. Cerdan A. Couturier M. Hernandez Y. Le Bissonnais M. H. Nichols J. P. Nunes V. Souchère K. van Oost

Global climate has changed over the past century. Precipitation amounts and intensities are increasing. In this study we investigated the response of seven soil erosion models to a few basic precipitation and vegetation related parameters using common data from one humid and one semiarid watershed. Perturbations were made to inputs for rainfall intensities and amounts, and to ground surface cov...

Journal: :Frontiers for Young Minds 2022

Trees make our cities and urban areas more livable. provide many benefits, known as ecosystem services, to residents. Cities often management plans care for their trees increase the benefits provided by forests. These include goals tree cover. This study assessed cover in 300 Florida (U.S.A.) cities. Each city’s canopy coverage (a percentage of how much a city is covered leafy tops trees) was a...

Journal: :محیط شناسی 0
رضا تمرتاش مربی دانشگاه علوم کشاورزی و منابع طبیعی ساری محمدرضا طاطیان استادیار دانشگاه علوم کشاورزی و منابع طبیعی ساری مائده یوسفیان دانشجوی کارشناسی ارشد مرتع داری، دانشگاه آزاد اسلامی واحد نور

carbon sequestration in soil and plant biomass is the most simple and economic way for co2 decrease that is important in environment improvement. this research was done in miankaleh region of behshahr in mazandaran for comparison of carbon sequestration in different plant types. firstly, plant types were determined and dominant species was identified in each type. number and size of plots was o...

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