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1,342 results for “Lichen”
FIG. 2 in Changes in functional and taxonomic diversity and composition of corticolous lichens in an altitudinal gradient in Colombia
FIG. 2. — Continuation.
Effective management for deadwood-dwelling lichen diversity requires landscape-scale habitat protection
<ol> <li>Habitat loss is considered a major threat for biodiversity. However, the scales on which its effects occur are still insufficiently understood, namely, is the amount of available habitat important for species richness on both local and landscape scales? We studied the effects of local and landscape-scale habitat amount on local-scale species density of deadwood-dependent lichens in Swedish boreal forests. Creation and retention of dead wood are common practices to benefit forest biodiversity, and recognizing the relevant scale is critical for them to be successful.</li> <li>We surveyed deadwood-dependent lichens in 90 unmanaged forest stands that differed in the local and landscape habitat amount. The local habitat amount was measured as the amount of dead wood in the sampled stands (m<sup>2</sup> dead wood/ha), while six alternative proxies were used to estimate the landscape habitat amount, i.e., the amount of dead wood in the landscapes surrounding the sampled forest stands. Lichen species density (number of species per standardized dead wood area of 3.7 m<sup>2</sup>) was modelled as a function of local habitat amount and landscape habitat amount at multiple scales (300 m – 5 km from the stands).</li> <li>We found that lichen species density increased with the landscape habitat amount. The proportion of old forests (> 100 years, including newly clear-cut stands that until recently were old forests) within 5 km from the studied stands explained species density better than the other proxies of landscape habitat amount. Local dead wood amount did not affect species density, and there was no interaction between the local and landscape habitat amount. </li> <li> <em>Synthesis and applications</em>: To promote the conservation of deadwood-dependent lichens, the amount of old forests in managed forest landscapes should be maintained or increased. A certain amount of dead wood hosted more lichen species when situated in a landscape with more old forest, while there was no effect of the local dead wood amount. This suggests that management aimed at increasing the local species density of deadwood-dwelling lichens should focus on creating and maintaining habitat in the surrounding landscape rather than on only adding deadwood to that local site. In other words, effective management for deadwood-dependent lichen diversity requires landscape-scale habitat protection.</li> </ol>
Epiphytic bryophyte and lichen transplant dataset, Oregon, USA
<p>This dataset consist of epiphytic bryophyte and lichen transplants, which were transplanted along elevation gradient in Oregon, USA in 2010. The data is part of the publication: "Epiphytic bryophyte and lichen transplant niches in changed environments along an elevational gradient in Pacific Northwest conifer forests". The data were collected with a financial support of Fulbright Scholar programme 2009/2010 and processed with a financial support of postdoctoral grant “Epiphyte metapopulation dynamics in boreo-nemoral forest landscape” (Nr. 1.1.1.2/VIAA/3/19/469).</p>
Lichens as bioindicators of monitoring of the selective air pollution, Zabrze (Poland) - total carbon (TC) and total sulfur (TS) results.
<p>Total carbon (TC) and total sulfur (TS) contents were measured using an Eltra CS-500 IR-analyzer with a TIC module. TC was determined using an infrared cell detector on CO2 gas, which was evolved by combustion under an oxygen atmosphere. Calibration was made by means of the Eltra standards 2.27 % S and 45.14 % C. <br> Dr Ewa Szram, employed at the Institute of Earth Sciences, Faculty of Natural Sciences, Silesian University in Katowice, carried out the project. This research was funded by the National Science Centre, Poland MINIATURA-6 2022/06/X/ST10/00338 “Lichens as bioindicators of monitoring of the selective air pollution”</p>
Lichens as bioindicators of monitoring of the selective air pollution, Zabrze (Poland) - XRF analysis results.
<p>XRF analyses were performed by the BRUKER S8 TIGER series 2 WD-XRF spectrometer with a 1kW Rh X-ray tube. The system is equipped with five analyzing crystals (LiF200, PET, XS–55, LIF-220 & Ge) and two detectors (flow and scintillation counter). The samples were measured by best detection mode (18min analysis time), and the results were evaluated in Quant-Express (fundamental parameters) and SPECTRAplus Software.<br> Dr Ewa Szram, employed at the Institute of Earth Sciences, Faculty of Natural Sciences, Silesian University in Katowice, carried out the project. This research was funded by the National Science Centre, Poland MINIATURA-6 2022/06/X/ST10/00338 “Lichens as bioindicators of monitoring of the selective air pollution”</p>
Lichens as bioindicators of monitoring of the selective air pollution, Zaabrze (Poland) - chromatograms of GC-MS
<p>Detailed geochemical analyses were performed on 21 powdered samples after their extraction using ultrasound Elmasonic Easy with a dichloromethane (DCM) and methanol (MeOH) mixture (1:1 vol). Extracts were separated into aliphatic-, aromatic-, semipolar- and polar fractions by column chromatography. Silica-gel was first activated at 120 °C for 24 h, cooled, and poured into Pasteur pipettes. Foour eluents were used for fraction collection, namely, n-pentane for the aliphatic fraction, n-pentane and DCM (7:3) for the aromatic fraction, acetone and DCM (1:1) for the semipolar fraction, and DCM and methanol (1:1) for the polar fraction. The semipolar - and polar fraction was derivatized with MTBSTFA (N-tertbutyldimethylsilyl-N-methyltrifluoroacetamide). Samples were derivatized with MTBSTFA dissolved in super-dehydrated n-hexane, and heated at 70 °C for 3 h. The composition of the separated extracts was analyzed by gas chromatography–mass spectrometry (GC–MS) using an Agilent gas chromatograph 7890A coupled with a mass spectrometer 5975C XL MDS. A DB-5UI column was applied (60 m × 250 μm id, 0.25 μm stationary phase film), with He (purity of 99.9999%) as a carrier gas. The experimental conditions were as follows: injection volume of 1 μL; split/splitless mode; initial temperature of 45 ◦C (isothermal for 1 min); heating rate up to 100 ◦C at 20 ◦C/min, then 3 ◦C/min to 280 ◦C for 66.25 min. The mass spectrometer worked in electron ionization (EI) mode at 70 eV in full scan mode and scanned from 50 to 650 Da.<br> Dr Ewa Szram, employed at the Institute of Earth Sciences, Faculty of Natural Sciences, Silesian University in Katowice, carried out the project. This research was funded by the National Science Centre, Poland MINIATURA-6 2022/06/X/ST10/00338 “Lichens as bioindicators of monitoring of the selective air pollution”</p>
Thallus hydrophobicity: a low-cost method for understanding lichen ecophysiological responses to environmental changes
<p><strong>Premise</strong>: Methods to evaluate lichen thalli hydrophobicity were described in the past, but only recently this was shown to be an important functional trait related to water regulation dynamics that could be used to predict future climate change effects.</p> <p><strong>Methods and Results:</strong> Our protocol requires only a micropipette, distilled water, a tripod and a phone or camera. Hydrophobicity is inferred from multiple metrics associated with absorption times of standardized droplets (initial and total absorption time). We used a dataset of 93 lichen taxa with different growth forms and from different biomes and demonstrated that this method is well suited for capturing different levels of hydrophobicity, including very hydrophilic species.</p> <p><strong>Conclusions</strong>: Our results show that the measurement of lichen hydrophobicity is a rapid and low-cost method to assess an ecophysiologically based lichen functional trait that can be used with almost no limitations, including in different climates, lichen species, and growth forms.</p>
Methotrexate for Severe Vulvar Lichen Sclerosus
ClinicalTrials.gov study NCT07352917. IPD Sharing: UNDECIDED. Countries: 1. Publications: 12.
The CO2RE® System for Vulvar Lichen Sclerosus
ClinicalTrials.gov study NCT04148651. IPD Sharing: NO. Countries: 1. Publications: 5.
Salivary and Serum Leptin Levels in Oral Lichen Planus Patients: A Case-control Study.
ClinicalTrials.gov study NCT06078579. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Efficacy and Safety of Baricitinib in Oral Lichen Planus: a Proof-of-Concept Study
ClinicalTrials.gov study NCT06158113. IPD Sharing: YES. Countries: 1. Publications: 4.
Pimecrolimus Cream for Oral Lichen Planus
ClinicalTrials.gov study NCT00297037. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Topical Ruxolitinib Lichen Planus
ClinicalTrials.gov study NCT03697460. IPD Sharing: NO. Countries: 1. Publications: 1.
Baricitinib (LY3009104) in the Treatment of Cutaneous Lichen Planus
ClinicalTrials.gov study NCT05188521. IPD Sharing: Not stated. Countries: 1. Publications: 2.
A Clinical Study of Curcuminoids in the Treatment of Oral Lichen Planus
ClinicalTrials.gov study NCT00525421. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Clobetasol Propionate Versus Fractionated Carbon Dioxide Laser for the Treatment of Lichen Sclerosus
ClinicalTrials.gov study NCT02573883. IPD Sharing: Not stated. Countries: 1. Publications: 4.
Lichen Sclerosus - Treatment With Triamcinolone Acetonide: Injections (Syringe and Needle) x Micro Injections (MMP Technique)
ClinicalTrials.gov study NCT06079645. IPD Sharing: YES. Countries: 1. Publications: 5.
Data from: A review of the lichen genus Phlyctis in North America (Phlyctidaceae) including the description of a new widespread saxicolous species from eastern North America
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Measurements of lead concentrations and isotope ratios of moss and lichens from Portland, Oregon, U.S., and surrounding rural areas
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Data from: Low-productivity boreal forests have high conservation value for lichens
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