A lake-dwelling beetle, Dytiscus dauricus



Berlow, E. L., R. A. Knapp, S. M. Ostoja, R. J. Williams, H. McKenny, J. R. Matchett, Q. Guo, G. M. Fellers, P. Kleeman, M. L. Brooks, and L. Joppa. A network extension of species occupancy models in a patchy environment applied to the Yosemite toad (Anaxyrus canorus). PLoS ONE 8:e72200. [Link]

Bradford, D. F., K. A. Stanley, N. G. Tallent, D. W. Sparling, M. S. Nash, R. A. Knapp, L. L. McConnell, and S. L. Massey Simonich. Temporal and spatial variation of atmospherically deposited organic contaminants at high elevation in Yosemite National Park, California, USA. Environmental Toxicology and Chemistry 32: 517-525. [PDF]

Deiner, K., R. A. Knapp, D. M. Boiano, and B. May. Increased accuracy of species lists developed for alpine lakes using morphology and cytochrome oxidase I for identification of specimens. Molecular Ecology Resources 13:820-831. [PDF]

Garwood, J. M., R. A. Knapp, K. L. Pope, R. L. Grasso, M. L. Magnuson, and J. R. Maurer. Use of historically fishless high-mountain lakes and streams by neartic River Otters (Lontra canadensis) in California. Northwestern Naturalist 94: 51-66. [PDF]

Miner, B. E., R. A. Knapp, J. K. Colbourne, and M. E. Pfrender. Evolutionary history of alpine and subalpine Daphnia in western North America. Freshwater Biology 58:1512-1522. [PDF]


Bradford, D. F., R. A. Knapp, D. W. Sparling, M. S. Nash, K. A. Stanley, N. G. Tallent-Halsell, L. L. McConnell, and S. M. Simonich. Pesticide distributions and population declines of California, USA, alpine frogs, Rana muscosa and Rana sierrae. Environmental Toxicology and Chemistry 30:682-691. [PDF]

Knapp, R. A., C. J. Briggs, T. C. Smith, and J. R. Maurer. Nowhere to hide: impact of a temperature-sensitive amphibian pathogen along an elevation gradient in the temperate zone. Ecosphere 2:art93. [Link]


Briggs, C. J., R. A. Knapp, and V. T. Vredenburg. Enzootic and epizootic dynamics of the chytrid fungal pathogen of amphibians. Proceedings of the National Academy of Sciences 107: 9695-9700. [Link]

Epanchin, P. N., R. A. Knapp, and S. P. Lawler. Nonnative trout impact an alpine-nesting bird by altering aquatic insect subsidies. Ecology 91:2406-2415. [PDF]

Latta, L. C., Fisk, D. L., R. A. Knapp, and M. E. Pfrender. Genetic resilience of Daphnia populations following experimental removal of introduced fish. Conservation Genetics 11:1737-1745. [PDF]

Vredenburg, V. T., R. A. Knapp, T. S. Tunstall, and C. J. Briggs. Dynamics of an emerging disease drive large-scale amphibian extinctions. Proceedings of the National Academy of Sciences, 107:9689-9694. [Link]


Kramer, A. M., O. Sarnelle, and R. A. Knapp. 2008. Allee effect limits colonization success of sexually reproducing zooplankton. Ecology 89:2760-2769. [PDF]

Knapp, R. A., and O. Sarnelle. 2008. Recovery after local extinction: factors affecting re-establishment of alpine lake zooplankton. Ecological Applications 18:1850-1859. [PDF]


Davidson, C., and R. A. Knapp. 2007. Multiple stressors and amphibian declines: dual impacts of pesticides and fish on yellow-legged frogs. Ecological Applications 17:587-597. [PDF]

Fisk, D. L., L. C. Latta, R. A. Knapp, and M. E. Pfrender. 2007. Rapid evolution in response to introduced predators I: rates and patterns of morphological and life-history trait divergence. BMC Evolutionary Biology 7:22. [PDF]

Knapp, R. A., D. M. Boiano, and V. T. Vredenburg. 2007. Removal of nonnative fish results in population expansion of a declining amphibian (mountain yellow-legged frog, Rana muscosa). Biological Conservation 135:11-20. [PDF]

Latta, L. C., J. W. Bakelar, R. A. Knapp, and M. E. Pfrender. 2007. Rapid evolution in response to introduced predators II: the contribution of adaptive plasticity. BMC Evolutionary Biology 7:21. [PDF]

Morgan, J. A. T., V. T. Vredenburg, L. J. Rachowicz, R. A. Knapp, M. J. Stice, T. Tunstall, R. E. Bingham, J. M. Parker, J. E. Longcore, C. Moritz, C. J. Briggs, and J. W. Taylor. 2007. Population genetics of the frog-killing fungus Batrachochytrium dendrobatidis. Proceedings of the National Academy of Sciences, USA 104:13845–13850. [PDF]

Vredenburg, V. T., R. Bingham, R. Knapp, J. A. T. Morgan, C. Moritz, and D. Wake. 2007. Concordant molecular and phenotypic data delineate new taxonomy and conservation priorities for the endangered mountain yellow-legged frog. Journal of Zoology 271:361-374. [PDF]


Knapp, R. A., and J. A. T. Morgan. 2006. Tadpole mouthpart depigmentation as an accurate indicator of chytridiomycosis, an emerging disease of amphibians. Copeia 2006:188–197. [PDF]

Rachowicz, L. J., R. A. Knapp, J. A. T. Morgan, M. J. Stice, V. T. Vredenburg, J. M. Parker, and C. J. Briggs. 2006. Emerging infectious disease as a proximate cause of amphibian mass mortality. Ecology 87:1671–1683. [PDF]


Adams, M. J., B. R. Hossack, R. A. Knapp, P. S. Corn, S. A. Diamond, P. C. Trenham, and D. B. Fagre. 2005. Distribution patterns of lentic-breeding amphibians in relation to ultraviolet radiation exposure in western North America. Ecosystems 8:488-500. [PDF]

Briggs, C. J., V. T. Vredenburg, R. A. Knapp, and L. J. Rachowicz. 2005. Investigating the population-level effects of chytridiomycosis: an emerging infectious disease of amphibians. Ecology 86:3149–3159. [PDF]

Brooks, P. D., C. M. O’Reilly, S. A. Diamond, D. H. Campbell, R. Knapp, D. Bradford, P. S. Corn, B. Hossack, and K. Tonnessen. 2005. Spatial and temporal variability in the amount and source of dissolved organic carbon: implications for ultraviolet exposure in amphibian habitats. Ecosystems 8:478-487. [PDF]

Brose, U., L. Cushing, E. L. Berlow, T. Jonsson, C. Banasek-Richter, L.-F. Bersier, J. L. Blanchard, T. Brey, S. R. Carpenter, M.-F. C. Blandenier, J. E. Cohen, H. A. Dawah, T. Dell, F. Edwards, S. Harper-Smith, U. Jacob, R. A. Knapp, M. E. Ledger, J. Memmott, K. Mintenbeck, J. K. Pinnegar, B. C. Rall, T. Rayner, L. Ruess, W. Ulrich, P. Warren, R. J. Williams, G. Woodward, P. Yodzis, and N. D. Martinez. 2005. Body sizes of consumers and their resources. Ecology 86:2545. [PDF]

Diamond, S. A., P. C. Trenham, M. J. Adams, B. R. Hossack, R. A. Knapp, S. L. Stark, D. Bradford, P. S. Corn, K. Czarnowski, P. D. Brooks, D. Fagre, B. Breen, N. E. Detenbeck, and K. Tonnessen. 2005. Estimated ultraviolet radiation doses in wetlands in six national parks. Ecosystems 8:462-477. [PDF]

Harper-Smith, S., E. L. Berlow, R. A. Knapp, R. J. Williams, and N. D. Martinez. 2005. Communicating ecology through food webs: visualizing and quantifying the effects of stocking alpine lakes with trout. Pages 407-423 in P. C. de Ruiter, V. Wolters, and J. C. Moore, editors. Dynamic food webs - multispeces assemblages, ecosystem development and environmental change. Academic Press, Burlington, Massachusetts. [PDF]

Knapp, R. A. 2005. Effects of nonnative fish and habitat characteristics on lentic herpetofauna in Yosemite National Park, USA. Biological Conservation 121:265-279. [PDF]

Knapp, R. A., C. P. Hawkins, J. Ladau, and J. G. McClory. 2005. Fauna of Yosemite National Park lakes has low resistance but high resilience to fish introductions. Ecological Applications 15:835-847. [PDF]

Sarnelle, O., and R. A. Knapp. 2005. Nutrient recycling by fish versus zooplankton grazing as drivers of the trophic cascade in alpine lakes. Limnology and Oceanography 50:2032-2042. [PDF]


Armstrong, T. W., and R. A. Knapp. 2004. Response by trout populations in alpine lakes to an experimental halt to stocking. Canadian Journal of Fisheries and Aquatic Sciences 61:2025-2037. [PDF]

Sarnelle, O., and R. A. Knapp. 2004. Zooplankton recovery after fish removal: Limitations of the egg bank. Limnology and Oceanography 49:1382-1392. [PDF]


Knapp, R. A., K. R. Matthews, H. K. Preisler, and R. Jellison. 2003. Developing probabilistic models to predict amphibian site occupancy in a patchy landscape. Ecological Applications 13:1069-1082. [PDF]


Matthews, K. R., R. A. Knapp, and K. L. Pope. 2002. Garter snake distributions in high-elevation aquatic ecosystems: is there a link with declining amphibian populations and nonnative trout introductions? Journal of Herpetology 36:16-22. [PDF]


Knapp, R. A., P. S. Corn, and D. E. Schindler. 2001. The introduction of nonnative fish into wilderness lakes: good intentions, conflicting mandates, and unintended consequences. Ecosystems 4:275-278. [PDF]

Knapp, R. A., J. A. Garton, and O. Sarnelle. 2001. The use of egg shells to infer the historical presence of copepods in alpine lakes. Journal of Paleolimnology 25:539-543. [PDF]

Knapp, R. A., K. R. Matthews, and O. Sarnelle. 2001. Resistance and resilience of alpine lake fauna to fish introductions. Ecological Monographs 71:401-421. [PDF]

Matthews, K. R., K. L. Pope, H. K. Preisler, and R. A. Knapp. 2001. Effects of nonnative trout on Pacific treefrogs (Hyla regilla) in the Sierra Nevada. Copeia 101:1130-1137. [PDF]

Schindler, D. E., R. A. Knapp, and P. R. Leavitt. 2001. Alteration of nutrient cycles and algal production resulting from fish introductions into mountain lakes. Ecosystems 4:308-321. [PDF]


Knapp, R. A., and K. R. Matthews. 2000. Non-native fish introductions and the decline of the mountain yellow-legged frog from within protected areas. Conservation Biology 14:428-438. [PDF]

Knapp, R. A., and K. R. Matthews. 2000. Effects of nonnative fishes on wilderness lake ecosystems in the Sierra Nevada and recommendations for reducing impacts. Pages 312-317 in Proceedings: Wilderness Science in a Time of Change. Ogden, UT: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station.


Knapp, R. A., and H. K. Preisler. 1999. Is it possible to predict habitat use by spawning salmonids? A test using California golden trout (Oncorhynchus mykiss aguabonita). Canadian Journal of Fisheries and Aquatic Sciences 56:1576-1584. [PDF]

Matthews, K. R., and R. A. Knapp. 1999. A study of high mountain lake fish stocking effects on the U.S. Sierra Nevada wilderness. International Journal of Wilderness 5:24-26.


Knapp, R. A., and K. R. Matthews. 1998. Eradication of nonnative fish by gill netting from a small mountain lake in California. Restoration Ecology 6:207-213. [PDF]

Knapp, R. A., V. T. Vredenburg, and K. R. Matthews. 1998. Effects of stream channel morphology on golden trout spawning habitat and recruitment. Ecological Applications 8:1104-1117. [PDF]


Knapp, R. A. 1996. Non-native trout in natural lakes of the Sierra Nevada: an analysis of their distribution and impacts on native aquatic biota. Pages 363-407 in Sierra Nevada Ecosystem Project: Final Report to Congress. Volume III: Assessments, Commissioned Reports, and Background Information. Davis: University of California, Centers for Water and Wildland Resources. [PDF]

Knapp, R. A., and K. R. Matthews. 1996. Livestock grazing, golden trout, and streams in the Golden Trout Wilderness, California: impacts and management implications. North American Journal of Fisheries Management 16:805-820. [PDF]

Knapp, R. A., and V. T. Vredenburg. 1996. Spawning by California golden trout: characteristics of spawning fish, seasonal and daily timing, redd characteristics, and microhabitat preferences. Transactions of the American Fisheries Society 125:519-531. [PDF]

Knapp, R. A., and V. T. Vredenburg. 1996. A field comparison of the substrate composition of California golden trout redds sampled with two devices. North American Journal of Fisheries Management 16:674-681. [PDF]

Moyle, P. B., R. M. Yoshiyama, and R. A. Knapp. 1996. Status of fish and fisheries. Pages 953-973 in Sierra Nevada Ecosystem Project: Final Report to Congress. Vol. II: Assessments and scientific basis for management options. Davis: University of California, Centers for Water and Wildland Resources. [PDF]


Knapp, R. A. 1995. Influence of energy reserves on the expression of a secondary sexual trait in male bicolor damselfish, Stegastes partitus. Bulletin of Marine Science 57:672-681. [PDF]

Knapp, R. A., P. C. Sikkel, and V. T. Vredenburg. 1995. Age of clutches in nests and the within-nest spawning-site preferences of three damselfish species (Pomacentridae). Copeia 1995:78-88. [PDF]


Knapp, R. A. 1993. The influence of egg survivorship on the subsequent nest fidelity of female bicolour damselfish, Stegastes partitus. Animal Behaviour 46:111-121. [PDF]


Knapp, R. A., and J. T. Kovach. 1991. Courtship as an honest indicator of male parental quality in the bicolor damselfish, Stegastes partitus. Behavioral Ecology 2:295-300. [PDF]

Knapp, R. A., and R. R. Warner. 1991. Male parental care and female choice in the bicolor damselfish, Stegastes partitus: bigger is not always better. Animal Behaviour 41:747-756. [PDF]


Knapp, R. A., and T. L. Dudley. 1990. Growth and longevity of golden trout, Oncorhynchus aguabonita, in their native streams. California Fish and Game 76:161-173. [PDF]


Knapp, R. A., and R. C. Sargent. 1989. Egg-mimicry as a mating strategy in the fantail darter, Etheostoma flabellare: females prefer males with eggs. Behavioral Ecology and Sociobiology 25:321-326. [PDF]


Wilzbach, M. A., K. W. Cummins, and R. A. Knapp. 1988. Toward a functional classification of stream invertebrate drift. Verhandlung Internationale Vereinigung Limnologie 23:1244-1254. [PDF]