نتایج جستجو برای: vegetation and fertility

تعداد نتایج: 16839774  

Journal: :Anais da Academia Brasileira de Ciencias 2013
Paula C M D Mesquita Daniel C Passos Sonia Z Cechin

The choice of sampling methods is a crucial step in every field survey in herpetology. In countries where time and financial support are limited, the choice of the methods is critical. The methods used to sample snakes often lack objective criteria, and the traditional methods have apparently been more important when making the choice. Consequently researches using not-standardized methods are ...

Journal: :E3S web of conferences 2022

Soil thickness is an important basic characteristic of soil, which can directly reflect the degree soil development, closely related to fertility, and index for identifying fertility in field. It not only a supplementary source nutrients, but also primitive storage minerals, main indicator judging erosion. properties are indicators quality material basis plant growth. affect vegetation growth s...

2014
Gil Bohrer Pieter SA Beck Shadrack M Ngene Andrew K Skidmore Ian Douglas-Hamilton

BACKGROUND This study investigates the ranging behavior of elephants in relation to precipitation-driven dynamics of vegetation. Movement data were acquired for five bachelors and five female family herds during three years in the Marsabit protected area in Kenya and changes in vegetation were mapped using MODIS normalized difference vegetation index time series (NDVI). In the study area, eleva...

2009
Jenny C. Ordoñez Peter M. van Bodegom Jan-Philip M. Witte Ian J. Wright Peter B. Reich Rien Aerts

Aim This first global quantification of the relationship between leaf traits and soil nutrient fertility reflects the trade-off between growth and nutrient conservation. The power of soils versus climate in predicting leaf trait values is assessed in bivariate and multivariate analyses and is compared with the distribution of growth forms (as a discrete classification of vegetation) across grad...

2011
Rosane Collevatti Suelen Rabelo Joao Nabout Jose Diniz-Filho

Background The Neotropical Seasonally Dry Forests (SDF) are treedominated ecosystems that occur in disjunct areas of fertile soils throughout the Neotropics. The hypothesis that the vicariance of a formerly continuous seasonal woodland formation, which may have reached its maximum extension during a dry-cool period 18,000–12,000 bp (the LGM), the Pleistocenic Arc Hypothesis, has been raised to ...

Background and Amis: One of the phenomena in arid and semi-arid regions is dust storm. Dust is one of the environmental issues that affect the quality and pollution of the air, human health, soil fertility, visibility, economy, and many social and environmental aspects of the community. The present research has been carried out to identify and characterize the areas of dust source in Khorasan...

Ali Mahamane Ambouta J.M. Karimou Boubacar M. Moussa Mahamane Saadou SOUMANA Idrissa, Youssoufa Issiaka

Description of vegetation patterns associated with environmental factors such as grazing, climate, landforms, substrate variables etc. are helpful for land management planning. This study used new synecological tools to investigate plants composition and to provide ecological descriptions of plants communities of communal pastures in Sahelian Ecological Zone of Niger. Vegetation and several env...

Journal: :Acta Biologica Sibirica 2021

The syntaxonomic analysis of pine forests with Acer negundo occurring on fluvio-glacial sandy deposits Altai Krai (South-East Siberia) was made based 93 releves. It established that takes a different phytocenotic part in 2 associations, variants, and 6 no-ranked communities 4 classes orders according to the Braun-Blanquet approach. method detrended correspondence (DCA coordination) implemented ...

Journal: :ecopersia 2013
reza ghazavi abbasali vali

re-vegetation of bare soil is believed to increase, or at least maintain the organic matter levels of soil. the aim of this study was to investigate the soil characteristics changes, nutrient pool sizes and their availability under mid canopy, and canopy gap positions of saltbush in an area re-vegetated with atriplex lentiformis. some of the physical and chemical soil characteristics (the parti...

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