نتایج جستجو برای: soil dominant frequency

تعداد نتایج: 779920  

Journal: :journal of rangeland science 2012
maedeh yousefian khadijeh mahdavi mohammad mahdavi reza tamartash

livestock grazing is one of the most important kinds of land usage that has a high potential to decrease or increase carbon storage in rangeland ecosystem. this research was investigated the effects of enclosure on soil carbon storage in a rangeland with dominant plants of artemisia aucheri. hence, two rangelands of enclosure (shahtappeh-chah mahmood) and no enclosure (chiro) were chosen in sem...

Journal: :Journal of Degraded and Mining Lands Management 2022

Bogor, Cianjur, and Sukabumi areas of West Java Province, Indonesia, are vulnerable landslide areas. This study analyzes the characteristic factors affecting landslides. The analysis was carried out on 148 landslides from 415 2018-2020 landslides, which were selected purposively by considering heterogeneity soil, geology, slope classes, land use type, accessibility locations. Landslide characte...

2008
Kuo-Liang Wen Che-Min Lin Hsien-Jen Chiang Chun-Hsiang Kuo Yu-Chih Huang Hsin-Chieh Pu

In the Tatun mountain area of northern Taiwan are two strong motion stations approximately 2.5 km apart, TAP056 and TAP066 of the TSMIP network. The accelerometer at station TAP056 is often triggered by earthquakes, but that at TAP066 station is not. Comparisons of vertical and horizontal peak ground accelerations reveal PGA in the vertical, east-west, and north-south components at TAP056 stati...

Journal: :Proceedings. Biological sciences 2016
Y Anny Chung Jennifer A Rudgers

Understanding the mechanisms of species coexistence is key to predicting patterns of species diversity. Historically, the ecological paradigm has been that species coexist by partitioning resources: as a species increases in abundance, self-limitation kicks in, because species-specific resources decline. However, determining coexistence mechanisms has been a particular puzzle for sedentary orga...

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...

2015
Ekaterina Pushkareva Igor S. Pessi Annick Wilmotte Josef Elster Max Häggblom

Cyanobacterial diversity in soil crusts has been extensively studied in arid lands of temperate regions, particularly semi-arid steppes and warm deserts. Nevertheless, Arctic soil crusts have received far less attention than their temperate counterparts. Here, we describe the cyanobacterial communities from various types of soil crusts from Svalbard, High Arctic. Four soil crusts at different d...

2007
Waleed Roy Samira Asem

Contamination of the environment in Kuwait occurred in 1990-1991 during the Iraqi invasion and due to explosion of more than 700 oil wells. Oil contamination caused serious damage to the environment. This study was conducted to estimate the extent and volume of contaminated soil by using remote sensing, GIS application and field survey.. A map of the area was developed by GIS showing four types...

2006
Rodrigo Costa Monika Götz Nicole Mrotzek Jana Lottmann Gabriele Berg Kornelia Smalla

The bacterial and fungal rhizosphere communities of strawberry (Fragaria ananassa Duch.) and oilseed rape (Brassica napus L.) were analysed using molecular fingerprints. We aimed to determine to what extent the structure of different microbial groups in the rhizosphere is influenced by plant species and sampling site. Total community DNA was extracted from bulk and rhizosphere soil taken from t...

2011
Heiko Nacke Andrea Thürmer Antje Wollherr Christiane Will Ladislav Hodac Nadine Herold Ingo Schöning Marion Schrumpf Rolf Daniel

BACKGROUND Soil bacteria are important drivers for nearly all biogeochemical cycles in terrestrial ecosystems and participate in most nutrient transformations in soil. In contrast to the importance of soil bacteria for ecosystem functioning, we understand little how different management types affect the soil bacterial community composition. METHODOLOGY/PRINCIPAL FINDINGS We used pyrosequencin...

ژورنال: علوم آب و خاک 2012
نورایر تومانیان, , جهانگرد محمدی, , علیرضا کریمی‌‌کارویه, , عیسی اسفندیارپور بروجن, , محسن باقری بداغ‌آبادی, , محمدحسن صالحی, ,

Discrete Models of Spatial Variability (DMSV) have limitations for soil identification in traditional soil maps. New approaches, generally called digital soil mapping (DSM), using continuous methods (CMSV), try to predict soil classes or soil properties based on easily-available environmental variables. The objective of this study was to map the soil classes of the Borujen area, Chaharmahal-va-...

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