نتایج جستجو برای: forest and pasture coverage

تعداد نتایج: 16859084  

2011
Thomas Ranius Nicklas Jansson

Abandoned management has caused many sites with free-standing, large oaks (Quercus robur) to become more shaded. This study shows how forest regrowth affects beetle species associated with old oaks in south-eastern Sweden. Beetles were trapped by pitfall traps placed in hollows and window traps placed near hollows in oak trunks in pasture woodlands. We assessed the influence of forest regrowth,...

ژورنال: علوم آب و خاک 2018

Soil quality is the permanent soil ability to function as a live system within ecosystem under different land uses. Investigating the impact of land use type on soil quality indicators could help to distinguish sustainable managements and therefore, to inhibit soil degradation. In order to evaluate the effect of different land uses on soil quality indicators, a research based on a randomized co...

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In this study, the effects of three land use categories on runoff quality was investigated using a rainfall simulator, in six sub-catchments in Kakasharaf watershed in Lorestan province. In total, 39 instances of artificial rain with a duration 30 min were created and the amount of phosphorus and potassium in the resulting runoff was measured on three land uses. The results showed that the aver...

2017
Francisco C Ferreira Junior Raquel A Rodrigues Vincenzo A Ellis Lemuel O Leite Magno A Z Borges Érika M Braga

Habitat modification may change vertebrate and vector-borne disease distributions. However, natural forest regeneration through secondary succession may mitigate these effects. Here we tested the hypothesis that secondary succession influences the distribution of birds and their haemosporidian parasites (genera Plasmodium and Haemoproteus) in a seasonally dry tropical forest, a globally threate...

2015
YueHan Lu Xiaping Li Rajaa Mesfioui James E. Bauer R. M. Chambers Elizabeth A. Canuel Patrick G. Hatcher Jon M. Jacobs

Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI-FTICR-MS) has proven to be a powerful technique revealing complexity and diversity of natural DOM molecules, but its application to DOM analysis in grazing-impacted agricultural systems remains scarce. In the present study, we presented a case study of using ESI-FTICR-MS in analyzing DOM from four headwater...

Journal: :تحقیقات جغرافیایی 0
حسن مظفری کارشناس ارشد جغرافیای طبیعی گرایش ژئومورفولوژی ابوالقاسم امیراحمدی دانشگاه تربیت معلم سبزوار

geographical position, topographic conditions and climatic variety have caused the ‎province of zanjan to be known as the province of four seasons. its unique ‎ecological conditions, forest and pasture coverage, numerous water resources, ‎wildlife, several hunting zones, protected areas, caves, waterfalls, springs and tens of ‎other beautiful unique landscapes have caused this province ...

2004
TED R. FELDPAUSCH MARCO A. RONDON ERICK C. M. FERNANDES SUSAN J. RIHA ELISA WANDELLI

Over the past three decades, large expanses of forest in the Amazon Basin were converted to pasture, many of which later degraded to woody fallows and were abandoned. While the majority of tropical secondary forest (SF) studies have examined post-deforestation or post-agricultural succession, we examined post-pasture forest recovery in 10 forests ranging in age from 0 to 14 years since abandonm...

Journal: :Molecular ecology 2014
Fabiana S Paula Jorge L M Rodrigues Jizhong Zhou Liyou Wu Rebecca C Mueller Babur S Mirza Brendan J M Bohannan Klaus Nüsslein Ye Deng James M Tiedje Vivian H Pellizari

Land use change in the Amazon rainforest alters the taxonomic structure of soil microbial communities, but whether it alters their functional gene composition is unknown. We used the highly parallel microarray technology GeoChip 4.0, which contains 83,992 probes specific for genes linked nutrient cycling and other processes, to evaluate how the diversity, abundance and similarity of the targete...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2003
A S De Luca H L Vasconcelos T V Barrett

We studied the distribution of sandflies (Diptera: Phlebotominae)--insect vectors of several diseases, including leishmaniasis--at the interface between primary forest and cattle pasture and between primary forest and secondary forest (< 15 yr old) in Southern Brazilian Amazonia. Sandflies were collected by using a combination of light traps and traps having vertebrates as baits. Strong differe...

Journal: :Ecological applications : a publication of the Ecological Society of America 2011
Cameron S Gillies Hawthorne L Beyer Colleen Cassady St Clair

The persistence of forest-dependent species in fragmented landscapes is fundamentally linked to the movement of individuals among subpopulations. The paths taken by dispersing individuals can be considered a series of steps built from individual route choices. Despite the importance of these fine-scale movement decisions, it has proved difficult to collect such data that reveal how forest birds...

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