Patterns of Genetic Differentiation in Appalachian Desmognathine Salamanders
نویسندگان
چکیده
منابع مشابه
Niche conservatism drives elevational diversity patterns in Appalachian salamanders.
Many biodiversity hotspots are in montane regions, and many plant and animal groups have their highest species richness at intermediate elevations. Yet, the explanation for this hump-shaped diversity pattern has remained unclear because no studies have addressed both the ecological and evolutionary causes. Here, we address these causes in North American plethodontid salamanders, using a near-co...
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Sperm Aggregations in the Spermatheca of Female Desmognathine Salamanders (Amphibia: Urodela: Plethodontidae)
The alignment of sperm in a cloacal sperm storage gland, the spermatheca, was studied in female desmognathine salamanders by scanning and transmission electron microscopy. Females representing nine species and collected in spring, late summer, and fall in the southern Appalachian Mountains contained abundant sperm in their spermathecae. The spermatheca is a compound tubuloalveolar gland connect...
متن کاملCharacter Displacement via Aggressive Interference in Appalachian Salamanders
Ecological character displacement occurs when sympatric species compete with one another, resulting in morphological divergence. Theoretically, character displacement can evolve from a number of ecological interactions, such as exploitation, interference, or predation, but most examples describe species competing exploitatively for limiting resources (typically food). Here I report a case of ch...
متن کاملPatterns of ribosomal RNA evolution in salamanders.
Sequence comparisons are presented for four segments of the large subunit of ribosomal RNA, including divergent domains D7a and D7b, portions of the large divergent domains D2, D3, and D8, and evolutionarily conservative sequences flanking divergent domains. These results resolve phylogenetic relationships among exemplars of seven families of salamanders and the three amphibian orders. Phylogen...
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ژورنال
عنوان ژورنال: Journal of Heredity
سال: 1997
ISSN: 1465-7333,0022-1503
DOI: 10.1093/oxfordjournals.jhered.a023108