Page 3639 of 3657 Results 36381 - 36390 of 36569
Id/Author/Year/TitleOrder by:  Year  Id  Author  Title
33677
Agnelli A., Corti G., Massaccesi L., Ventura S. & D’Acqui L.P. (2021): Impact of biological crusts on soil formation in polar ecosystems - Geoderma, 401: 115340 [10 p.]

We tested the impact of biological soil crusts (BSC) at different degrees of development on soil formation in Polar ecosystems, specifically in two Arctic sites, Svalbard Island (Norway) and Tarfala (Sweden), and in an Antarctic site, Apostrophe Island (Victoria Land). In each site, slightly developed BSC (thin and made by green algae and cyanobacteria associations – SD-BSC) highly developed BSC (thick and dominated by green algae and cyanobacteria associations with/without mosses and/or lichens … URL EndNote Read more... 

25596
Agnan Y., Séjalon-Delmas N., Claustres A. & Probst A. (2015): Investigation of spatial and temporal metal atmospheric deposition in France through lichen and moss bioaccumulation over one century - Science of the Total Environment, 529: 285–296

Lichens and mosses were used as biomonitors to assess the atmospheric deposition of metals in forested ecosystems in various regions of France. The concentrations of 17 metals/metalloids (Al, As, Cd, Co, Cr, Cs, Cu, Fe, Mn, Ni, Pb, Sb, Sn, Sr, Ti, V, and Zn) indicated overall low atmospheric contamination in these forested environments, but a regionalism emerged from local contributions (anthropogenic activities, as well as local lithology). Taking into account the geochemical background and comparing … EndNote Read more... 

24120
Agnan Y., Séjalon-Delmas N. & Probst A. (2014): Origin and distribution of rare earth elements in various lichen and moss species over the last century in France - Science of the Total Environment, 487: 1-12

Rare earth elements (REE) are known to be powerful environmental tracers in natural biogeochemical compartments. In this study, the atmospheric deposition of REE was investigated using various lichens and mosses aswell as herbariumsamples from 1870 to 1998 fromsix major forested areas in France. The comparison between the REE distribution patterns in organisms and bedrocks showed a regional uniformity influence from dust particles originating from the bedrock and/or soil weathering that were … EndNote Read more... 

22446
Agnan Y., Séjalon-Delmas N. & Probst A. (2013): Comparing early twentieth century and present-day atmospheric pollution in SW France: A story of lichens - Environmental Pollution, 172: 139-148

Lichens have long been known to be good indicators of air quality and atmospheric deposition. Xanthoria parietina was selected to investigate past (sourced from a herbarium) and present-day trace metal pollution in four sites from South-West France (close to Albi). Enrichment factors, relationships between elements and hierarchical classification indicated that the atmosphere was mainly impacted by coal combustion (as shown by As, Pb or Cd contamination) during the early twentieth century, whereas … EndNote Read more... 

27299
Agnan Y., Probst A. & Séjalon-Delmas N. (2017): Evaluation of lichen species resistance to atmospheric metal pollution by coupling diversity and bioaccumulation approaches: A new bioindication scale for French forested areas - Ecological Indicators, 72: 99–110

In order to evaluate the metal resistance or sensitivity of lichen species and improve the bioindication scales, we studied lichens collected in eight plottings in French and Swiss remote forest areas. A total of 92 corticolous species was sampled, grouped in 54 lichen genera and an alga. Various ecological variables were calculated to characterize the environmental quality – including lichen diversity, lichen abundance, and Shannon index –, as well as lichen communities. Average ecological features … EndNote Read more... 

31279
Agnan Y., Courault R., Alexis M.A., Zanardo T., Cohen M., Sauvage M. & Castrec-Rouelle M. (2019): Distribution of trace and major elements in subarctic ecosystem soils: Sources and influence of vegetation - Science of the Total Environment, 682: 650–662

Artic and subarctic environments are particularly sensitive to climate change with a fasterwarming compared to other latitudes. Vegetation is changing but its role on the biogeochemical cycling is poorly understood. In this study, we evaluated the distribution of trace elements in subarctic soils from different land covers at Abisko, northern Sweden: grassland, moor, broad-leaved forest, and peat bog. Using various multivariate analysis approaches, results indicated a spatial heterogeneity with … EndNote Read more... 

27782
Aghoramurthy K., Sarma K.G. & Seshadri TR. (1961): Chemical investigations of Indian lichens--XXIV. The chemical components of Alectoria virens Tayl. Composition of a new depsidone, virensic acid - Tetrahedron, 12(3): 173-177

depsidones, Alectoria virens, virensic acid EndNote Read more... 

13553
Aghamiri R. & Schwartzman D.W. (2002): Weathering rates of bedrock by lichens: a mini watershed study - Chemical Geology, 188: 249-259

Keywords: Chemical weathering; Lichens; Lichen mini watershed; Bare-rock mini watershed; Laboratory mini watershed; Rate of denudation; Cumulative flux ratio EndNote Read more... 

13849
Agerer R. et al. (2000): Open letter to the scientific community of mycologists: provide voucher specimens - Mycotaxon, 76: 489-493

A plea for proper documentation EndNote Read more... 

21716
Agelet A. & Vallès J. (2003): Studies on pharmaceutical ethnobotany in the region of Pallars (Pyrenees, Catalonia, Iberian Peninsula). Part III. Medicinal uses of non-vascular plants - Journal of Ethnopharmacology, 84: 229-234

Keywords: Ethnobotany; Pyrenees; Catalonia; Non-vascular medicinal plants; Folk medicine. EndNote Read more... 

Page 3639 of 3657 Results 36381 - 36390 of 36569