نتایج جستجو برای: vegetation types

تعداد نتایج: 531142  

2010
José Antonio LÓPEZ-SÁEZ Francisca ALBA-SÁNCHEZ

The paucity of modern pollen-rain data from the Iberian Peninsula is a signifi cant barrier to understanding the Late Quaternary vegetation history of this globally important southwestern mediterranean region. The relationships between current vegetation, the available environmental data and modern pollen are examined in Central Spain for both natural and human-induced vegetation types, as an a...

باغستانی , ناصر , ثواقبی, محمد حسین , رحیمیان , محمد حسن , عبداللهی, جلال ,

The present study discusses a method used to produce updated information about vegetation cover in arid and semi-arid zones, using RS data and GIS technique. In this method, Landsat ETM+ data in 2002 was collected in an area of about 60000 ha in Nodoushan basin, Yazd, Iran. To collect the necessary ground data, 50 sites of different vegetation types were selected and the percentage of vegetatio...

Journal: :Remote Sensing 2011
Rim Amri Mehrez Zribi Zohra Lili-Chabaane Benoît Duchemin Claire Gruhier Abdelghani G. Chehbouni

The analysis of vegetation dynamics is essential in semi-arid regions, in particular because of the frequent occurrence of long periods of drought. In this paper, multi-temporal series of the Normalized Difference of Vegetation Index (NDVI), derived from SPOT-VEGETATION satellite data between September 1998 and June 2010, were used to analyze the vegetation dynamics over the semi-arid central r...

2012
Manuel de la Estrella Rubén G. Mateo Jan J. Wieringa Barbara Mackinder Jesús Muñoz

OBJECTIVES Species Distribution Models (SDMs) are used to produce predictions of potential Leguminosae diversity in West Central Africa. Those predictions are evaluated subsequently using expert opinion. The established methodology of combining all SDMs is refined to assess species diversity within five defined vegetation types. Potential species diversity is thus predicted for each vegetation ...

Journal: :Kansas Agricultural Experiment Station Research Reports 1995

Journal: :Sustainability 2022

Forest types are generally identified using vegetation or land-use types. However, classifications less frequently consider the actual forest attributes within each type. To address this in an objective way across different regions and to link with their climate, we aimed improve distribution of be more realistic useful for biodiversity preservation, management, ecological forestry research. Th...

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