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1,342 results for “Lichen”
Fig 2 in Some New To Latvia Lichens And Allied Fungi
Fig 2. Old woodland from study area.
Fig 1 in Some New To Latvia Lichens And Allied Fungi
Fig 1. Study areas.
Fig. 2 in Addenda to the lichen flora of the Ticino river valley (western Po Plain, Italy)
Fig. 2 - Cladonia verticillata, abandoned airfield "La Promessa".
Fig. 1 in Addenda to the lichen flora of the Ticino river valley (western Po Plain, Italy)
Fig. 1 - Cladonia peziziformis, Brughiera di Tornavento.
Influence of wavelength on the laser removal of lichens colonizing heritage stone-Associated dataset
<p>A number of techniques were employed to detect morphological and chemical changes on the irradiated surfaces. Stereomicroscopy was used to describe morphological and colour changes. Scanning electron microscopy (SEM) at low vacuum served to analyse the effects on the surface of the lichens, while SEM-BSE of the polished transversal cross sections was applied to assess effects inside the crust and in the lithic substrate. FT-Raman spectroscopy was employed to detect possible structural and chemical changes.</p>
Arctic Biodiversity: Arctic Lichens
Biogeography and other attributes for Arctic organisms, various sources.<p></p>Meltofte, H. (ed.) 2013. Arctic Biodiversity Assessment. Status and trends in Arctic biodiversity. Conservation of Arctic Flora and Fauna, Akureyri. <p></p>https://arcticbiodiversity.is/index.php/the-report/chapters/fungi
Arctic Biodiversity: Arctic Lichen Ecology
Biogeography and other attributes for Arctic organisms, various sources.<p></p>Meltofte, H. (ed.) 2013. Arctic Biodiversity Assessment. Status and trends in Arctic biodiversity. Conservation of Arctic Flora and Fauna, Akureyri. <p></p>https://arcticbiodiversity.is/index.php/the-report/chapters/fungi
Lichen Flora of the Greater Sonoran Desert Region: Volume 1
Nash III, T.H., C. Gries and F. Bungartz (eds.) 2007. Lichen Flora of the Greater Sonoran Desert Region. Lichen Unlimited: Arizona State University, Tempe.
Lichen Flora of the Greater Sonoran Desert Region: Volume 2
Nash III, T.H., C. Gries and F. Bungartz (eds.) 2007. Lichen Flora of the Greater Sonoran Desert Region. Lichen Unlimited: Arizona State University, Tempe.
Lichen Flora of the Greater Sonoran Desert Region: Volume 3
Nash III, T.H., C. Gries and F. Bungartz (eds.) 2007. Lichen Flora of the Greater Sonoran Desert Region. Lichen Unlimited: Arizona State University, Tempe.
Pictures of Tropical Lichens
<p>A collection of images of lichens form tropical regions in the world. The growing number of images is brought together by several members of the lichenological community.</p>
Checklist of lichens from the Volcanic Rocks of Spain (Canary Islands excluded)
<p><span>The dataset includes 3529 records of 395 species. It includes: (1) data from several field studies conducted in the volcanic area of the central zone (Campo de Calatrava) during the years 2021-2024; (2) records from collections made in 2006 in the Chafarinas Islands; and (3) bibliographic data from other volcanic areas of Spain (excluding the Canary Islands). In the central zone (basalts), 171 species have been identified; in the E-SE zone (basalts), 84 species; in the SE zone (mainly andesites), 146 species; in the NE zone (basalts), 108 species; on the Chafarinas archipelago (mainly andesites), 59 species; on the Columbretes Islands (basalts), 70 species; and on the Alborán Island, less studied, only 6 species have been identified. The checklist is annotated with information about the species, province, municipality, locality, geographical position, altitude, habitat type, collector’s name, date, and associated reference.</span></p>
Warm range margin of boreal bryophytes and lichens not directly limited by temperatures
<p>1. Species at their warm range margin are potentially threatened by higher temperatures, but may persist in microrefugia. Whether such microsites occur due to more suitable microclimate or due to lower biotic pressure from e.g. competitive species, is still not fully resolved.</p> <p>2. We examined whether boreal bryophytes and lichens show signs of direct climate limitation, i.e. whether they perform better in cold and/or humid microclimates at their warm range margin. We transplanted a moss, a liverwort, and a lichen to 58 boreal forest sites with different microclimates at the species' southern range margin in central Sweden. Species were grown in garden soil patches to control effects of competitive exclusion and soil quality. We followed the transplanted species over three growing seasons (2016-2018) and modelled growth and vitality for each species as a function of sub-canopy temperature, soil moisture, air humidity, and forest type. In 2018, we also recorded cover of other plants having re-colonized the garden soil patches and modelled this potential future competition with the same environmental variables plus litter.</p> <p>3. Species performance increased with warmer temperatures, which was often conditional on high soil moisture, and at sites with more conifers. Soil moisture had a positive effect, especially on the moss in the last year 2018, when the growing season was exceptionally hot and dry. The lichen was mostly affected by gastropod grazing. Recolonization of other plants was also faster at warmer and moister sites. The results indicate that competition, herbivory, shading leaf litter, and water scarcity might be more important than direct temperature for performance at the species' warm range margin.</p> <p>4. Synthesis. In a transplant experiment with three boreal understory species we did not find signs of direct temperature limitation towards the south. Forest microrefugia, i.e. habitats where these species could persist regional warming, may instead be sites with fewer competitors and enemies, and with sufficient moisture and more conifers in the overstory.</p>
Climate warming causes photobiont degradation and C starvation in a boreal climate sentinel lichen
<p>The long-term potential for acclimation by lichens to warming climates is poorly known, despite their prominent roles in forested ecosystems. Although often considered "extremophiles", lichens may not readily acclimate to novel climates well beyond historical norms. In a previous study (Smith et al. 2018), Evernia mesomorpha transplants in a whole-ecosystem climate change experiment showed drastic mass loss after one year of warming. We examined the causes of this warming-induced mass loss by measuring physiological, functional, and reproductive attributes of lichen transplants. Severe loss of mass and physiological function occurred above +2ºC of warming. Loss of algal symbionts ("bleaching") and turnover in algal community compositions increased with temperature and were the clearest impacts of experimental warming. Enhanced CO 2 had no significant physiological or symbiont composition effects. The functional loss of algal photobionts led to significant loss of mass and specific thallus mass (STM), which in turn reduced water-holding capacity (WHC). Although algal genotypes remained detectable in thalli exposed to higher temperatures, within-thallus photobiont communities shifted in composition towards greater diversity. Analogous to the effects of climate change on corals, the balance of symbiont carbon metabolism in lichens is central to their resilience to changing conditions.</p>
Data from: Symbiont-specific responses to environmental cues in a threesome lichen symbiosis
<p><span>Photosymbiodemes are a special case of lichen symbiosis where one lichenized fungus engages in symbiosis with two different photosynthetic partners, a cyanobacterium and a green alga, to develop two distinctly looking photomorphs. We investigated differential gene expression in photosymbiodemes of the lichen <em>Peltigera</em> <em>britannica</em> at different temperatures representing mild and putatively stressful conditions and compared gene expression of thallus sectors containing cyanobacterial photobionts with thallus sectors with both green algal and cyanobacterial photobionts. Firstly, because of known ecological differences between photomorphs, we investigated symbiont-specific responses in gene expression to temperature increases. Secondly, we quantified photobiont-mediated differences in fungal gene expression. High temperatures expectedly led to an upregulation of genes involved in heat shock responses in all organisms in whole transcriptome data. As expected, the expression of genes involved in photosynthesis was increased in both photobiont types at 15 and 25°C. The green algae exhibited thermal stress responses mainly at 25°C, and the fungus and the cyanobacteria already by 15°C, demonstrating symbiont-specific responses to environmental cues and symbiont-specific ecological optima. Furthermore, photobiont-mediated differences in fungal gene expression could be identified, with upregulation of distinct biological processes in the different morphs, showing that interaction with specific symbiosis partners profoundly impacts fungal gene expression.</span></p>
Data for: Carbon-concentrating mechanisms are a key trait in lichen ecology and distribution
<p>Carbon-concentrating mechanisms (CCMs) are a widespread phenomenon in photosynthetic organisms. In vascular plants, the evolution of CCMs (C4 and CAM) is associated with significant shifts, most often to hot, dry and bright or aquatic environments. If and how CCMs drive distributions of other terrestrial photosynthetic organisms, remains little studied. Lichens are ecologically important obligate symbioses between fungi and photosynthetic organisms. The primary photosynthetic partner in these symbioses can include CCM-presenting cyanobacteria (as carboxysomes), CCM-presenting green algae (as pyrenoids) or green algae lacking any CCM. We use an extensive dataset of lichen communities from eastern North America, spanning a wide climatic range, to test the importance of CCMs as predictors of lichen ecology and distribution. We show that presence or absence of CCMs leads to opposite responses to temperature and precipitation in green algal lichens, and with different responses in cyanobacterial lichens. These responses <span>contrast with</span> our understanding of lichen physiology, whereby CCMs mitigate carbon limitation by water saturation at the cost of efficient use of vapor hydration. This study demonstrates that CCM-status is a key functional trait in obligate lichen symbioses, equivalent in importance to its role in vascular plants, and central for studying present and future climate responses.</p>
FIG. 12 in Analysis of lichen secondary chemistry doubled the number of Cetrelia W.L. Culb. & C.F. Culb. species (Parmeliaceae, lichenised Ascomycota) in Hungary
FIG. 12. — Altitudinal distribution of Cetrelia W.L.Culb.& C.F.Culb.species in Hungary.
FIG. 9 in Analysis of lichen secondary chemistry doubled the number of Cetrelia W.L. Culb. & C.F. Culb. species (Parmeliaceae, lichenised Ascomycota) in Hungary
FIG. 9. — Distribution of Cetrelia monachorum (Zahlbr.) W.L. Culb. & C.F. Culb. in Hungary.
FIG. 8 in Analysis of lichen secondary chemistry doubled the number of Cetrelia W.L. Culb. & C.F. Culb. species (Parmeliaceae, lichenised Ascomycota) in Hungary
FIG. 8. — Distribution of Cetrelia chicitae (W.L.Culb.) W.L. Culb.& C.F. Culb.in Hungary.
FIG. 2 in New lichen species and records from the Chapada dos Guimarães, Mato Grosso, Brazil
FIG. 2. — Gassicurtia lopesiana sp. nov., holotype, habitus. Width of picture 15 mm.
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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)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.