نتایج جستجو برای: natural forest

تعداد نتایج: 576922  

2011
Hisatomo Taki Yuichi Yamaura Kimiko Okabe Kaoru Maeto

In terrestrial ecosystems, ecological processes and patterns within focal patches frequently depend on their matrix. Crop fields (focal patches) are often surrounded by a mosaic of other land-use types (matrix), which may act as habitats for organisms and differ in terms of the immigration activities of organisms to the fields. We examined whether matrix quality affects wild pollinator abundanc...

2013
Yuelin Li Fangfang Yang Yangxu Ou Deqiang Zhang Juxiu Liu Guowei Chu Yaru Zhang Dennis Otieno Guoyi Zhou

BACKGROUND Natural forest succession often affects soil physical and chemical properties. Selected physical and chemical soil properties were studied in an old-growth forest across a forest successional series in Dinghushan Nature Reserve, Southern China. METHODOLOGY/PRINCIPAL FINDINGS The aim was to assess the effects of forest succession change on soil properties. Soil samples (0-20 cm dept...

2010
Marielle Brunette Stéphane Couture Serge Garcia

This paper analyses the willingness-to-pay (WTP) of forest owners for insurance against natural hazards such as fire. The objective is to identify the determinants of forest owner’s participation to insurance and insurance demand. In particular, we are interested in the impact of different types of public compensation: fixed help, contingent fixed help and insurance subsidy. We also analyse the...

2016
Hyeok Park Eun-Hwa Lee Kang-Hyeon Ka Ahn-Heum Eom

In this study, we collected rhizosphere soils and root samples from a post-mining area and a natural forest area in Jecheon, Korea. We extracted spores of arbuscular mycorrhizal fungi (AMF) from rhizospheres, and then examined the sequences of 18S rDNA genes of the AMF from the collected roots of plants. We compared the AMF communities in the post-mining area and the natural forest area by sequ...

2000
John E Lundquist Ned B Klopfenstein

Increasingly more research has focused on characterizing diversity within forest pathogen populations using molecular markers but few studies have characterized features of the landscape that help create or maintain this diversity. Forest diseases commonly occur in patchy distributions across natural landscapes which can be re¯ected in the genetic composition of the fragmented pathogen populati...

2016
Christel C. Kern Julia I. Burton Patricia Raymond Anthony W. D’Amato William S. Keeton Alejandro A. Royo Michael B. Walters Christopher R. Webster John L. Willis

USDA Forest Service, Northern Research Station, 5985 Highway K, Rhinelander, WI, 54501 USA Department of Forest Ecosystems & Society, Oregon State University, 321 Richardson Hall, Corvallis, OR 97331, USA Direction de la recherche forestière, Ministère des Forêts, de la Faune et des Parcs du Québec, 2700 rue Einstein, Québec, G1P 3W8, Canada Rubenstein School of Environment and Natural Resource...

2015
Chorong Song Harumi Ikei Maiko Kobayashi Takashi Miura Masao Taue Takahide Kagawa Qing Li Shigeyoshi Kumeda Michiko Imai Yoshifumi Miyazaki

There has been increasing attention on the therapeutic effects of the forest environment. However, evidence-based research that clarifies the physiological effects of the forest environment on hypertensive individuals is lacking. This study provides scientific evidence suggesting that a brief forest walk affects autonomic nervous system activity in middle-aged hypertensive individuals. Twenty p...

Journal: :پژوهش های علوم و فناوری چوب و جنگل 0

plantation of fast-growing species such as poplar is one of the important methods for wood production in the countries with low natural forest areas. physiological differences of populus deltoides clones planted through three decades in shast kalate research forest are unknown. peroxidase enzyme in this research was used for clone separation as a biochemical marker that is sensitive to environm...

Journal: :international journal of environmental research 0

land cover change constitutes one of main way of alteration of soil organic matter in both quantitative and qualitative terms. the goal of this study was to compare the carbon stock and the isotopic signature of the organic matter in the soil of areas with different land use, covered with forest and grass (pasture). the study area is located at sorocaba, sp, brazil. using un-deformed soil sampl...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید