نتایج جستجو برای: vegetation types

تعداد نتایج: 531142  

2009
Martha K. Raynolds Donald A. Walker

An understanding of the factors controlling the distribution of arctic vegetation will allow better prediction of the effects of climate change. This study examines the effect of the age of landscapes on the distribution of arctic vegetation. We compared time since deglaciation with the distribution of vegetation types and Advanced Very High Resolution Radiometer (AVHRR) satellite measures of g...

2016
Long Chen Changshun Zhang Gaodi Xie Chunlan Liu Haihua Wang Zheng Li Sha Pei Qing Qiao

Vegetation plays a very important role of carbon (C) sinks in the global C cycle. With its complex terrain and diverse vegetation types, the Lancang River Basin (LRB) of southwest China has huge C storage capacity. Therefore, understanding the spatial variations and controlling mechanisms of vegetation C storage is important to understand the regional C cycle. In this study, data from a forest ...

ژورنال: مرتع 2022

Railway construction is one of the important activities in the development of any country and in developing countries, the need for roads is one of the main axes of development. Railway construction operations can effect on desert rangelands around railway. This study investigates the effects of Yazd-Eghlid railway construction on vegetation diversity and richness in  the rangelands of Kalmand-...

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 ...

2015
T. Wakita J. Susaki

In this study, we propose a method to accurately extract vegetation from terrestrial three-dimensional (3D) point clouds for estimating landscape index in urban areas. Extraction of vegetation in urban areas is challenging because the light returned by vegetation does not show as clear patterns as man-made objects and because urban areas may have various objects to discriminate vegetation from....

Journal: رستنیها 2018

The Mirabad protected area (S. Azarbaijan, Iran) has a variety of ecological nurseries due to elevation of the sea, physiographic factors, micro-climates and soil types, and has high vegetation diversity. Mirabad protected area in the Piranshahr-Sardasht axis is between the latitudes of 36° 23' and 36° 31' north, and the lengths 45° 15' and 45° 25', with an area of ​​11435 ha, in the elevation ...

Journal: :Vegetation Classification and Survey 2021

Aims : To quantify how fine-grain (within-plot) beta diversity differs among biomes and vegetation types. Study area Palaearctic biogeographic realm. Methods We extracted 4,654 nested-plot series with at least four different grain sizes between 0.0001 m² 1,024 from the GrassPlot database spanning broad geographic ecological gradients. Next, we calculated slope parameter ( z -value) of power-law...

Journal: :Korean Journal of Environmental Agriculture 2009

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