منابع مشابه
Correlates of species richness in North American bat families
Aim A near universal truth in North America is that species richness increases from the Arctic Circle to the Central American tropics. Latitude is regarded as a major explanatory variable in species density, although it is only a surrogate for underlying ecological variables. I aimed to elucidate those underlying ecological variables that are associated with variation in bat species richness ac...
متن کاملDiscussion of Related Species in North American Canids and Mustelids
Specimens of Filaroides milksi Whitlock, 1956 removed from the same lung tissue as were the type specimens were re-examined. Because of morphological features similar to those found in the genus Andersonstrongylus Webster, 1978 and inconsistent with those in Filaroides van Beneden, 1850, F. milksi is removed from the latter and placed in Andersonstrongylus as A. milksi (Whitlock, 1956). All ava...
متن کاملInvasion of North American drainages by alien fish species
1. Data from the literature were used to document colonization patterns by introduced freshwater fishes in 125 drainages across temperate North America. We analysed this data set to quantify susceptibility to invasion, success of the invaders and changes in species richness. 2. Drainages with a high number of impoundments, large basin area and low native species diversity had the greatest numbe...
متن کاملBiological Species Concepts in Eastern North American Populations of Lentinellus
As part of a biosystematic study of the Lentinellus ursinus species complex in eastern North America, field and herbarium specimens from North America, Central America, and Europe were examined. Crossing single basidiospore isolates demonstrated tetrapolar (bifactorial) mating systems. Three biological species are recognized as L. ursinus, L. angustifolius, and L. vulpinus. The production of gl...
متن کاملDNA barcoding of eight North American coregonine species.
Coregonine fishes have a circumpolar distribution in the Arctic and sub-Arctic Northern Hemisphere. This subfamily of Salmonidae consists of three genera: Prosopium, Stenodus and Coregonus, including over 30 species. Many species overlap spatially and are difficult to distinguish based on morphological characteristics, especially as larvae or juveniles. Here we present a method for rapid and co...
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ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1920
ISSN: 0006-8071
DOI: 10.1086/332761