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- W42851465 abstract "Scopelophila cataractae is one of about seven species of bryophytes that ar known as copper mosses because of their ecological association with copper or other metals. Like other copper mosses, S. cataractae is geographically widespread, occurring in North and South America, Europe and Asia, but is extremely rare throughout its range and is disjunct across tremendous distances. In North America, the species occurs at only a few localities in California, Arizona, Texas, Tennessee, North Carolina, and Pennsylvania, and an absence of sporophytes indicates that sexual reproduction does not occur here. Plants from both metal-contaminated and uncontaminated soils exhibit tolerance of metals and there is no evidence of differentiation among populations in terms of substrate requirements or tolerances. All North American plants studied thus far are monomorphic at eight enzyme loci, except those from the Texas populations, which differ at one peroxidase locus. Plants from anthropogenic metal-contaminated sites in the eastern US are uniformly male (or sterile) whereas those from natural sites in the southern Appalachians (North Carolina), Cumberland Plateau (Tennessee), and Santa Rita Mountains (Arizona) are uniformly female (or sterile). All plants from California and Texas are completely sterile. Geographic disjunctions between male and female plants explains the absence ofmore » sexual reproduction, and suggests episodes of long distance dispersal.« less" @default.
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- W42851465 date "1990-01-01" @default.
- W42851465 modified "2023-09-24" @default.
- W42851465 title "Reproductive biology and population structure in the rare copper moss, Scopelophila cataractae" @default.
- W42851465 hasPublicationYear "1990" @default.
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