• Publications
  • Influence
Cave Life: Evolution and Ecology
  • 373
  • 41
Regional Coexistence of Species and Competition between Rare Species.
  • R. Levins, D. Culver
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences…
  • 1 June 1971
A model is developed for the coexistence and exclusion of species over a region of similar habitable patches. Since the balance of local extinction and colonization would leave some patchesExpand
  • 663
  • 25
  • PDF
Adaptation and Natural Selection in Caves: The Evolution of Gammarus minus
1. Introduction 2. Caves as Evolutionary Laboratories 3. Gammarus minus as a Model Organism 4. The Ecological Theater 5. The Geography of Gammarus minus 6. Making a Case for Selection 7. Putting theExpand
  • 178
  • 17
MYRMECOCHORY IN VIOLA: DYNAMICS OF SEED-ANT INTERACTIONS IN SOME WEST VIRGINIA SPECIES
SUMMARY (1) The interactions of ants and diplochorous Viola seeds were studied at four forest and forest-edge sites in Monongahela National Forest, West Virginia. Of the nine Viola species studied,Expand
  • 264
  • 17
A CONCEPTUAL MODEL OF THE FLOW AND DISTRIBUTION OF ORGANIC CARBON IN CAVES
3 Abstract: We present a conceptual model for the movement of organic carbon in karst. We argue that the drainage basin is the most appropriate unit for analyzing energy flux in karst. There are twoExpand
  • 123
  • 11
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Vestigialization and Loss of Nonfunctional Characters
Reduction and total loss of characters are common evolutionary phenomena. Vestigial ization of any morphological, physiological, or behavioral feature can be expected upon relaxation of selection onExpand
  • 187
  • 9
The Guild of Myrmecochores in the Herbaceous Flora of West Virginia Forests
Analysis of herbaceous vegetation and ant activity in random quadrats from 10 forest sites in West Virginia, USA, shows that ant-dispersed (myrmecochorous) plant species constitute about 30% of theExpand
  • 197
  • 9
Directed Dispersal: Demographic Analysis of an Ant-Seed Mutualism
Certain seed dispersers may benefit plants by depositing seeds in specific microsites favorable for survival or growth. This has been called "directed dispersal." We examine the effects of seedExpand
  • 157
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