نتایج جستجو برای: lichens

تعداد نتایج: 2200  

Journal: :The Science of the total environment 2012
Gregorio Aragón Isabel Martínez Aroa García

Latitudinal gradients that involve macroclimatic changes can affect the diversity of several groups of plants and animals. Here we examined the effect of a latitudinal gradient on epiphytic communities on a single host species (Fagus sylvatica) to test the core-periphery theory. The latitudinal span considered, covering two biogeographic regions, is associated with major changes in rainfall dur...

Journal: :Molecules 2015
Verena K Mittermeier Nicola Schmitt Lukas P M Volk Juan Pablo Suárez Andreas Beck Wolfgang Eisenreich

Non-targeted ¹H-NMR methods were used to determine metabolite profiles from crude extracts of Alpine and Ecuadorian lichens collected from their natural habitats. In control experiments, the robustness of metabolite detection and quantification was estimated using replicate measurements of Stereocaulon alpinum extracts. The deviations in the overall metabolite fingerprints were low when analyzi...

Journal: :Environmental pollution 2001
H F van Dobben H T Wolterbeek G W Wamelink C J Ter Braak

A study was conducted to determine the joint effect of gaseous atmospheric pollutants and trace elements on epiphytic lichens. We used our data to test the hypothesis that lichens are generally insensitive to toxic effects of trace elements, and can therefore be used as accumulator organisms to estimate concentrations of these elements in the environment. In a field study in The Netherlands the...

Journal: :international journal of advanced biological and biomedical research 2014
farid houshyar soleiman jamshidi mohammad sohrabi

potato is one of the main crops which is suffering from the great losses in storage and the most conventional method of its tuber rot is using hazardous chemicals. using antimicrobial potential of lichens can be one of the safe, green, environment friendly methods for plant diseases management. in this study, antimicrobial activity of acetone, methanol, chloroform extracts of ramalina capitaat,...

Journal: :Botanica Complutensis 2021

A checklist of lichens and lichenicolous fungi Sierra Nevada (Granada, southeast Spain) is presented, fruit the collecting field trip carried out by Spanish Lichen Society (SEL), complemented with literature references. The authors identified 194 taxa (171 23 fungi). As a result these identifications, 46 nine are reported for first time in Nevada. To date, catalogue includes 551 (528 We confirm...

Journal: :Diversity 2021

Lichens are used in traditional medicine, food and various other ethnic uses by cultures across the Himalayas southwestern parts of China. Evidence-based knowledge from historical modern literatures investigation 1990 proved that lichen species as medicine China totaled to 142 species; furthermore, 42 were utilized food. Moreover, some lichens popularly for produce life. An understanding clarif...

2006
DAVID R. FOSTER

Long fire rotation, high levels of precipitation, and acidic nature of the bedrock are factors contributing to the dominance of Sphagnum in many upland and peatland communities in southeastern Labrador. Vegetation development induced by local or regional environmental change frequently involves replacement of species assemblages of various bryophytes and lichens by species assemblages dominated...

2015
Beata Klimek Agata Tarasek Joanna Hajduk

The aim of the study was to assess trace metal air pollution in the Beskidy Mountains, the Outer Western Carpathians, Poland, with a widely used bioaccumulating organism, a lichen, Hypogymnia physodes. Lichens were collected at five stands (mountains) in parallel transect and analyzed for cadmium (Cd), copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn) content. Concentrations of Cd, Pb and Zn in...

2012

S u m m a ry : Previous studies have demonstrated that lichens can accumulate high amounts of radioactivity. Because of their long life expectancy they are suitable and inexpensive biological detectors of the nuclear fallout. In this study, liehen samples were collected from diffe­ rent locations in Austria over a period of more than 15 years. Samples were taken before, immediately after and a ...

2010
Espen Jettestuen Anders Nermoen Geir Hestmark Einar Timdal Joachim Mathiesen

Crustose lichen communities on rocks exhibit fascinating spatial mosaics resembling political maps of nations or municipalities. Although the establishment and development of biological populations are important themes in ecology, our understanding of the formation of such patterns on the rocks is still in its infancy. Here, we present a novel model of the concurrent growth, establishment and i...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید