نتایج جستجو برای: forest and pasture coverage

تعداد نتایج: 16859084  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2008
Cameron S Gillies Colleen Cassady St Clair

Riparian corridors and fencerows are hypothesized to increase the persistence of forest animals in fragmented landscapes by facilitating movement among suitable habitat patches. This function may be critically important for forest birds, which have declined dramatically in fragmented habitats. Unfortunately, direct evidence of corridor use has been difficult to collect at landscape scales and t...

2013
Nivia da Silva Dias Ronald Zanetti Mônica Silva Santos Maria Fernanda Gomes Villalba Peñaflor Sônia Maria Forti Broglio Jacques Hubert Charles Delabie

Ants are known to function as reliable biological indicators for habitat impact assessment. They play a wide range of ecological roles depending on their feeding and nesting habits. By clustering ants in guilds, it is possible both to assess how agriculture and forest fragmentation can disturb ant communities and to predict the ecological impacts due to losses of a specific guild. This study ai...

Journal: :Environmental microbiology reports 2011
Lydia H Zeglin Anne E Taylor David D Myrold Peter J Bottomley

Ammonia-oxidizing bacteria and ammonia-oxidizing archaea are commonly found together in soils, yet the factors influencing their relative distribution and activity remain unclear. We examined archaeal and bacterial amoA gene distribution, and used a novel bioassay to assess archaeal and bacterial contributions to nitrification potentials in soils spanning a range of land uses (forest, pasture, ...

2009
TC DLAMINI RJ HAYNES R VAN ANTWERPEN

The effects of land management including sugarcane, horticultural crops (citrus, avocado and banana), forestry (gum, wattle and pine), kikuyu pasture, native forest and native grassland on the size and composition of the earthworm community on sugarcane estates in northern KwaZulu-Natal was investigated. Earthworm numbers followed the order: burnt sugarcane < trashed sugarcane = grassveld = gum...

Journal: :Forests 2023

The objectives were to analyze the dynamics of land use and cover Amazon biome over time through spatial modeling, project its future scenario with Land Change Modeler (LCM) module. This analysis was based on 1985, 2014 2017 data from MapBiomas project, which associated socioeconomic explanatory variables Cramer-V test. Results showed that Forest Formation class occupied 3,844,800.75 km2 (91.20...

2003
U. S. Nair R. O. Lawton R. M. Welch R. A. Pielke

[1] Recent studies have shown that there has been a reduction in dry season moisture input from direct interception of cloud water and wind-blown mist at the lee edge of the Monteverde cloud forest, Costa Rica, since the mid 1970s. This reduction of moisture could be responsible for the population crashes of anurans observed in the region. It has been hypothesized that this behavior is a result...

2013
David A. N. Ussiri Rattan Lal

Reclaimed mined soils (RMSs) could restore soil quality and ecosystem productivity while sequestering C and off-setting some of C emissions associated with coal utilization. The study was conducted to evaluate the effects of tillage and pasture management on soil physical properties, soil organic carbon (SOC) and microbial biomass carbon (MBC) in RMSs managed for agricultural use in eastern Ohi...

Journal: :معماری و شهرسازی آرمان شهر 0
kyoumars habibi assistant professor in urban planning, university of kurdistan, sannandaj, iran. arman rahimi kakejob m.a. student in urban planning, university of kurdistan, sannandaj, iran.

the ecological footprint as an indicator estimates the effect of population and industrial products process on ecosystem by evaluating and calculating the used energy and materials in a city, region or country. dehgolan county is located in kurdistan province between hamadan and sanandaj cities. dehgolan is one of the important and effective counties of kurdistan in agriculture. however, with t...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2013
M M Rodrigues M A Uchôa S Ide

Dung beetles (Coleoptera: Scarabaeoidea) in three landscapes in Mato Grosso do Sul, Brazil. Dung Beetles are important for biological control of intestinal worms and dipterans of economic importance to cattle, because they feed and breed in dung, killing parasites inside it. They are also very useful as bioindicators of species diversity in agricultural or natural environments. The aims of this...

2002
Jean P. H. B. Ometto Lawrence B. Flanagan Luiz A. Martinelli Marcelo Z. Moreira Niro Higuchi James R. Ehleringer

[1] Our objective was to measure the stable carbon isotope composition of leaf tissue and CO2 released by respiration (dr), and to use this information as an estimate of changes in ecosystem isotopic discrimination that occur in response to seasonal and interannual changes in environmental conditions, and land-use change (forest-pasture conversion). We made measurements in primary forest and pa...

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