Isotopic niche overlap between the invasive leiothrix and potential native competitors. We analysed niche overlap between the red-billed leiothrix Leiothrix lutea, a spreading exotic invasive bird, and the European robin Erithacus rubecula and the blackcap Sylvia atricapilla, similar native species, which are commonly considered as potential competitors in Mediterranean forests. We analyzed stable isotope ratios (δ13C and δ15N) from feathers of birds sampled in several locations within the Collserola mountain range (Barcelona, NE Spain) where leiothrix have strongly increased their numbers in the last decade and quantified niche overlap with nicheROVER. Blackcap individuals showed the lowest probability to be found in the isotopic niche of the other two species (around 60 %), while leiothrix and robins showed a high probability to share the same isotopic niche (82 %). Our results stress that competition for resources is potentially high and the species shared marked niche asymmetries, which may have implications for community dynamics in the long term.
The collection of type specimens of the family Ptinidae (Coleoptera) deposited in the Natural History Museum of Barcelona, Spain.-The collection of the Ptinidae family (Coleoptera) deposited in the Natural History Museum of Barcelona, Spain has been organised, revised and documented. This collection belonged to Francesc Español Coll, a world specialist in this family, and it has become an important reference point for research on that family. The collection is composed of a total of 8,854 specimens, 498 of which are type species. In this paper we provide all the available information related to these type specimens, so for any single taxon, species or subspecies, the following information is given: the original and current taxonomic status, original citation of type materials, exact transcription of original labels, and preservation condition of specimens. Moreover, the differences between original descriptions and labels are discussed. When a taxonomic change has occurred, the references that examine those changes are included at the end of the taxa description.
The collection of Lepidoptera type specimens deposited in the of Natural Sciences Museum of Barcelona (MCNB), Spain.-The Lepidoptera type specimens in the collection of the Natural Sciences Museum of Barcelonawere reorganized and catalogued. The revised collection-the vast majority of which belonged to Ignasi de Sagarra-now consists of 1,128 type specimens, corresponding to 168 taxa. This study provides all the available information relating to each of the revised specimens, including the current taxonomic status, the original name if different, the original reference for the type material, the exact transcription of the original label, and the conservation status of the specimen. Differences between the original description of species and their labels, as well as any taxonomical changes that have occurred, are also discussed. The corresponding bibliography is included in the references. If a taxonomic change has occurred since the description of taxa, the references discussing such changes are given.
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