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1,342 results for “Lichen”
FIG. 2 in New species of lichen for Colombia tropical dry forest
FIG. 2. — Ocellularia vallensis Soto-Medina & Lücking, sp. nov.: A, habitus; B, C, ascospores. Scale bars: A, 10 mm; B, C, 10 μm.
FIG. 1 in New species of lichen for Colombia tropical dry forest
FIG. 1. — Astrothelium caucavallense Soto-Medina & Aptroot, sp. nov.: A, habitus; B, ascospores. Scale bars: A, 10 mm; B, 10 μm.
FIG. 2. — Oxneriaria immersa H.S.Asghar, R in New species of genus Oxneriaria S.Y.Kondr. & Lőkös (lichenized Ascomycota, Megasporaceae) from Khyber Pakhtunkhwa, Pakistan
FIG. 2. — Oxneriaria immersa H.S.Asghar, R.Zulfiqar & Khalid, sp. nov. (holotype): A, crustose-areolate thallus; B, apothecia; C, cross section of an apothecium; D, ascospores. Scale bars: A, 1 cm; B, 0.5 mm; C, 50 µm; D, 15 µm.
FIG. 3. — Oxneriaria insignis R in New species of genus Oxneriaria S.Y.Kondr. & Lőkös (lichenized Ascomycota, Megasporaceae) from Khyber Pakhtunkhwa, Pakistan
FIG. 3. — Oxneriaria insignis R.Zulfiqar & Khalid, sp. nov. (holotype): A, crustose-areolate thallus; B, apothecia; C, cross section of an apothecium; D, ascospores. Scale bars: A, 1 cm; B, 0.5 mm; C, 150 µm; D, 15 µm.
FIG. 1 in New species of genus Oxneriaria S.Y.Kondr. & Lőkös (lichenized Ascomycota, Megasporaceae) from Khyber Pakhtunkhwa, Pakistan
FIG. 1. — Molecular phylogenetic analysis by maximum likelihood (ML) method based on ITS sequences. Bootstrap values> 50% based on 1000 replicates for ML are shown at the branches and novel sequences generated during this study are in bold.
PoC Study to Evaluate the Efficacy and Safety of Secukinumab 300 mg in Patients With Lichen Planus
ClinicalTrials.gov study NCT04300296. IPD Sharing: YES. Countries: 3. Publications: 3.
Weak effect of urbanisation on bdelloid rotifers living in lichens
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Date Creek Lichen colonization data
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Terrestrial lichen data for Northwest Territories, Canada
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Modelling the carbon balance in bryophytes and lichens: Presentation of PoiCarb 1.0, a new model for explaining distribution patterns and predicting climate-change effects
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Lichen abundance and biodiversity along a chronosequence from young managed stands to ancient forest, 1993 (Neitlich thesis)
The diversity of epiphytic lichens in old growth forests has stimulated considerable research (e.g., Howe 1978, Pike et al. 1975; Hoffman and Kazmierski 1969). We possess few data on the lichen communities of younger stands or the manner in which they develop as the forest ages. As our society grapples with the consequences of habitat loss and pressure on existing natural populations, such data are acutely needed (FEMAT 1993). This paper seeks to describe the relationship between forest age and the abundance and diversity of lichens in one region, and in doing so, to invite more rigorous assessment of the conservation needs of lichens with respect to forest management. Moveover, that documenting these patterns will facilitate research into age- related processes directly influencing lichen abundance and diversity.
Arctic LTER 1988: del 13C and del 15N ratios measurement for Eriophorum, Carex and lichen species in water tracks at Toolik and Imnavait Creek
del 13C and del 15N ratios were measured for plant and lichen in watertracks in the Toolik Lake drainage and the east facing slope of the Imnavait Creek area. Sampling locations for each species for a specific date were chosen across an elevation gradient starting from the lakeside and leading to ridge crest. The vegetation was dried and analyzed for stable isotopes.
Lichen Resurvey with Heavy Metal Analysis: Distribution of Praseodymium concentration in lichen tissue in Maricopa County
Distribution of Praseodymium concentration in lichen tissue collected as part of a study of heavy metals in lichens in Maricopa County, AZ.
Epiphytic lichen surveys on 12 valleywide plots in Hubbard Brook 2016
Using the USFS FIA lichen indicator protocol we inventoried 12 valleywide plots of mixed broadleaf and conifer tree composition over an elevation gradient to examine patterns of lichen abundance and diversity in the valley and their possible correspondence to air pollution indices and landscape variables. The surveys were conducted as part of an NSF funded LTER REU project by Aílis Clyne in 2016. Voucher specimens from this study were deposited at the Cornell Plant Pathology Herbarium (CUP) and the results published in the Journal of the Torrey Botanical Society. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station. An analysis of these data can be found in: Natalie L. Cleavitt, Ailís B. Clyne, Timothy J. Fahey "Epiphytic macrolichen patterns along an elevation gradient in the White Mountain National Forest, New Hampshire," The Journal of the Torrey Botanical Society, 146(1), 8-17, (21 January 2019)
Data from: The weight of the crust: biomass of crustose lichens in tropical dry forest represents more than half of foliar biomass
In recent years, our ecological knowledge of tropical dry forests has increased dramatically. However, the functional contributions of whole ecosystem components, such as lichens, remain mostly unknown. In these forests, the abundance of epiphyte crustose lichens is responsible for the characteristic white bark on most woody plants, conspicuous during the dry season, but the amount of resources that the lichen component represents remains unexplored. We estimated lichen biomass in a Mexican tropical dry forest using the bark area of trees, the dry mass of lichens per unit area and the percentage of bark covered by lichens, together with previously known tree densities. The lowest 2.5 m of the forests main trunks contained 188 kg/ha of lichen biomass, with lichens covering 85% of the available bark for trees <12 cm DBH and 38% for trees >12 cm. Total epiphytic lichen biomass was 1.34–1.99 Mg/ha. Lichen biomass represented 61% of the foliar biomass in the forest. To our knowledge, this is the first time that a lichen biomass estimate is provided for an ecosystem in which crustose lichens are the dominant lichen growth form. Crustose lichens are typically considered to contribute little to the total lichen biomass and to be difficult to include in ecological analyses. The high lichen biomass in this ecosystem implies a significant ecological role which so far is unexplored. We suggest the crustose lichen component should not be underestimated a priori in ecological studies, especially in ecosystems with abundant lichen cover.
Data from: Deep Divergence between Island Populations in Lichenized Fungi
<p>Macaronesia is characterized by a high degree of endemism and represents a noteworthy system to study the evolutionary history of populations and species. Here, we compare the population-genetic structure in three lichen-forming fungi, the widespread <i>Lobaria pulmonaria</i> and two Macaronesian endemics, <i>L. immixta</i> and <i>L. macaronesica,</i> based on microsatellites. We utilize population genetic approaches to explore population subdivision and evolutionary history of these taxa on the Canary Islands, Madeira, Azores, and the western Iberian Peninsula. A common feature in all species was the deep divergence between populations on the Azores, a pattern expected by the large geographic distance among islands. For both endemic species, there was a major split between archipelagos. In contrast, in the widespread <i>L. pulmonaria</i>, divergent individuals were distributed across multiple archipelagos, suggesting a complex evolutionary history involving repeated migration between islands and mainland.</p>
Data from: Lichen biodiversity and ecology in the San Bernardino and San Jacinto Mountains in southern California (U.S.A.)
San Bernardino National Forest in southern California encompasses two major mountain ranges, the San Bernardino Mountains and the San Jacinto Mountains. Here 414 taxa of lichenized fungi are reported from San Bernardino National Forest as a whole; 327 from the San Jacinto Mountains (including the Santa Rosa Mountains), and 289 from the San Bernardino Mountains. Two species new to science are described: Lecanora remota and Lecidea stratura. Two undescribed taxa of Bellemerea and Scytinium are reported, both currently under study. Five species are reported new for North America and California: Gloeoheppia rugosa, Lecanora formosa, Peccania cernohorskyi, P. corallina and Psorotichia vermiculata. Peccania cernohorskyi is also reported new for Canada (British Columbia). Eight species are reported new for California: Caloplaca diphasia, C. isidiigera, Peltigera extenuata, Rhizocarpon simillimum, Rinodina lobulata, R. terrestris, Sarcogyne squamosa, and Xylographa difformis. Lecidea xanthococcoides is recognized as a synonym of Lecanora cadubriae. The California endemic Lecidea kingmanii is reported as producing 4-0-demethylplanaic acid. Polysporina simplex is treated as Acarospora simplex and P. urceolata as A. urceolata. The new combination Acarospora gyrocarpa is proposed for Polysporina gyrocarpa.
Data from: Low-productivity boreal forests have high conservation value for lichens
1. Land set aside for preservation of biodiversity often has low productivity. As biodiversity generally increases with productivity, due to higher or more diverse availability of resources, this implies that some of the biodiversity may be left unprotected. Due to a lack of knowledge on the species diversity and conservation value of low-productivity habitats, the consequences of the biased allocation of low-productivity land for set-asides are unknown. 2. We examined the conservation value of boreal low-productivity forests (potential tree growth < 1 m3 ha-1 year-1) by comparing assemblages of tree- and deadwood-dwelling lichens and forest stand structure between productive and low-productivity forest stands. We surveyed 84 Scots pine-dominated stands in three regions in Sweden, each including four stand types: two productive (managed and unmanaged) and two low-productivity stands (on mires and on thin, rocky soils). 3. Lichen species richness was highest in low-productivity stands on thin soil, which had similar amounts and diversity of resources (living trees and dead wood) to productive unmanaged stands. Stands in low-productivity mires, which had low abundance of living trees and dead wood, hosted the lowest lichen richness. Lichen species composition differed among stand types, but none of them hosted unique species. The differences in both species richness and composition were more pronounced in northern than in southern Sweden, likely due to shorter history of intensive forestry. 4. Synthesis and applications: Boreal low-productivity forests can have as high conservation value as productive forests, which should be reflected in conservation strategies. However, their value is far from uniform, and conservation planning should acknowledge this variation and not treat all low-productivity forests as a uniform group. Some types of low-productivity forest (e.g. on thin soil) are more valuable than others (e.g. on mires), and should thus be prioritized in conservation. It is also important to consider the landscape context: low-productivity forests may have higher value in landscapes where high-productivity forests are highly influenced by forestry. Finally, although low-productivity forests can be valuable for some taxa, productive forests may still be important for other taxa.
Data from: Lecanora caperatica (Lecanoraceae, lichenized ascomycetes) a new sorediate species widespread in eastern North America
Lecanora caperatica is described based on collections from throughout temperate eastern North America. It is a crustose sorediate species in the L. subfusca group which has pulcaris-type apothecia, and produces atranorin and caperatic acid often with accessory roccellic/angardianic acid. The species is chemically similar to the European L. mugosphagneti which differs in ecology, thallus morphology and in having albella-type apothecia. The generic placement of L. caperatica, and its affinity to the L. subfusca group, are confirmed by molecular phylogenetic analysis.
Vertical distribution of epiphytic lichens on Quercus laurina Humb. & Bonpl. in a remnant of cloud forest in the state of Veracruz, México
<p>It is considered that in the tropics, lichen richness and cover tend to increase from the trunk base to the top of the crown of trees. In this study we calculate total beta diversity of the lichen community along a vertical gradient on Quercus laurina. By comparing the richness and cover of the lichens by zone, we will be able to prove that the foliose and fruticose forms will be the minor component of the total lichen species richness; but with the highest cover with respect to the crustose lichens. Five zones were identified in each phorophyte (n=15) with a diameter at breast height > 40 cm. A total of 92 species were identified, of these, 38% were found only in a single zone, 51% were shared between the different zones, 11% occurred across all zones. Species richness and cover increased from the lowest to the highest zones of phorophytes. Dissimilarity in species composition between the zones, can be explained by species replacement. The Indicator Species Analysis revealed that only a few species such as Hypotrachyna vexans, H. cf. sublaevigata and Ramalina cf. sinaloensis preferred a particular zone. The results obtained to date show that the lichen community associated with Quercus laurina phorophytes is highly diverse. There is a high replacement of species across the different zones. Our results suggest that species richness and cover of the corticolous lichen community are related to the zone and the diverse growth forms.</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
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