1,721,223 research outputs found
The geographic origin of Favolaschia calocera, an invasive fungal species recently collected in Europe.
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Morphological and phylogenetic studies of Agaricus bresadolanus, Agaricus infidus (nom. inval.) and Agaricus romagnesii (Agaricaceae) reveal their conspecificity and variation in toxicity of this taxon
No full textParra, L.A., Vizzini, A., Ercole, E., Geml, J. (2023): Morphological and phylogenetic studies of Agaricus bresadolanus, Agaricus infidus (nom. inval.) and Agaricus romagnesii (Agaricaceae) reveal their conspecificity and variation in toxicity of this taxon. Phytotaxa 578 (3): 241-260, DOI: 10.11646/phytotaxa.578.3.3, URL: http://dx.doi.org/10.11646/phytotaxa.578.3.
Consumption of hypogeous and epigeous fungi by the red squirrel (Sciurus vulgaris) in subalpine conifer forests
No full textThe consumption of epigeous and hypogeous fungi by red squirrels Sciurus vulgaris in subalpine conifer forests in the Alps
was studied by determining the presence and taxa (genus level) of fungal spores in fecal samples. Nearly all live-trapped
squirrels in summer and autumn had eaten fruit bodies of hypogeous fungi, but only some animals had consumed epigeous fungi
of the genus Boletus and/or Laccaria. From two (spring) up to nine (summer–autumn) genera of hypogeous fungi were eaten.
The mean number of genera of fungi and the mean number of spores per mg fecal material differed between study areas and
seasons. Fruit bodies of hypogeous, and to a lesser extent epigeous, fungi seem to present an important seasonal food resource for
red squirrels in conifer forests of the Alps. We suggest that squirrels, having large home range size and dispersal distances, are
likely to play a major role as spore dispersal agent for hypogeous fungi.The consumption of epigeous and hypogeous fungi by red squirrels Sciurus vulgaris in subalpine conifer forests in the Alps was studied by determining the presence and taxa (genus level) of fungal spores in fecal samples. Nearly all live-trapped squirrels in summer and autumn had eaten fruit bodies of hypogeous fungi, but only some animals had consumed epigeous fungi of the genus Boletus and/or Laccaria. From two (spring) up to nine (summer-autumn) genera of hypogeous fungi were eaten. The mean number of genera of fungi and the mean number of spores per mg fecal material. differed between study areas and seasons. Fruit bodies of hypogeous, and to a lesser extent epigeous, fungi seem to present an important seasonal food resource for red squirrels in conifer forests of the Alps. We suggest that squirrels, having large home range size and dispersal distances, are likely to play a major role as spore dispersal agent for hypogeous fungi. (C) 2004 Elsevier B.V. All rights reserved
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Taxonomic re‐examination of nine rosellinia types (Ascomycota, xylariales) stored in the Saccardo mycological collection
Full text linkIn a recent monograph on the genus Rosellinia, type specimens worldwide were revised and re‐classified using a morphological approach. Among them, some came from Pier Andrea Saccardo’s fungarium stored in the Herbarium of the Padova Botanical Garden. In this work, we taxonomically re‐examine via a morphological and molecular approach nine different Rosellinia sensu Saccardo types. ITS1 and/or ITS2 sequences were successfully obtained applying Illumina MiSeq technology and phylogenetic analyses were carried out in order to elucidate their current taxonomic position. Only the ITS1 sequence was recovered for Rosellinia areolata, while for R. geophila, only the ITS2 sequence was recovered. We proposed here new combinations for Rosellinia chordicola, R. geophila and R. horridula, while for R. ambigua, R. areolata, R. australis, R. romana and R. somala, we did not suggest taxonomic changes compared to the current ones. The name Rosellinia subsimilis Sacc. is invalid, as it is a later homonym of R. subsimilis P. Karst. & Starbäck. Therefore, we introduced Coniochaeta dakotensis as a nomen novum for R. subsimilis Sacc. This is the first time that these types have been subjected to a molecular study. Our results demonstrate that old types are an important source of DNA sequence data for taxonomic re‐examinations
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