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Research Papers

 

  1. Roth, A-M., D. Campbell, P.A. Keddy, H. Dozier and G. Montz. 2008. How important is competition in a species-rich grassland? A two - year removal experiment in a pine savanna. Ecoscience 15: 94-100. (Download PDF)

  2. Cahill, J.F. Jr., S.W. Kembel, E.G. Lamb and P.A. Keddy. 2008. Does phylogenetic relatedness influence the strength of competition among vascular plants? Perspectives in Plant Ecology, Evolution and Systematics 10: 41-50. (Download PDF)
     

  3. Keddy, P.A., D. Campbell, T. McFalls, G. Shaffer, R. Moreau, C. Dranguet, and R. Heleniak.  2007. The wetlands of lakes Pontchartrain and Maurepas: past, present and future.  Environmental Reviews 15: 1- 35. (Download PDF)

  4. Geho, E.M., D. Campbell and P. A. Keddy. 2007. Quantifying ecological filters: the relative impact of herbivory, neighbours, and sediment on an oligohaline marsh. Oikos 116: 1006-1016.(Download PDF)

  5. Keddy, P.A. 2005. Putting the plants back into plant ecology: six pragmatic models for understanding and conserving plant diversity. (Invited Review) Annals of Botany 95(9): 1-13.(Download PDF)

  6. Keddy, P.A. 2005. Milestones in ecological thought− A canon for plant ecology. (Invited Perspective) Journal of Vegetation Science 16: 145-150. (Download PDF)

  7. Keddy, P.A., L. Smith, D.R. Campbell, M. Clark and G. Montz. 2006. Patterns of herbaceous plant diversity in southeastern Louisiana pine savannas. Applied Vegetation Science 9:17-26. (Download PDF)

  8. Menzel, T.O., P.A. Keddy, D. Kandalepas and D. Campbell . 2006. Grasshopper communities in relation to plant species and habitat type within the West Lake Pontchartrain Basin . Proceedings of the Louisiana Academy of Sciences68:1-12. (Download PDF)

  9. Houlahan, J., P. Keddy, K. Makkey and C.S. Findlay. 2006. The effects of adjacent land-use on wetland plant species richness and community composition.  Wetlands 26: 79-96.(Download PDF)

  10. Fraser, L.H. and P.A. Keddy. 2005. Can competitive ability predict structure in experimental plant communities? Journal of Vegetation Science 16: 571-578. (Download PDF)

  11. Keddy, P., K. Nielsen, E. Weiher, and R. Lawson. 2002. Relative competitive performance of 63 species of terrestrial herbaceous plants. Journal of Vegetation Science 13: 5-16.

  12. Keddy, P.A., L.H. Fraser, and T.A. Keogh. 2001. Responses of 21 wetland species to shortage of light, nitrogen and phosphorus. Bulletin of the Geobotanical Institute ETH 67: 13-25. (Download PDF)

  13. Keddy, P.A. and L.H. Fraser. 2000. Four general principles for the management and conservation of wetlands in large lakes: the role of water levels, nutrients, competitive hierarchies and centrifugal organization. Lakes and Reservoirs: Research and Management 5:177-185 (Download PDF)

  14. Keddy, P.A., C. Gaudet, and L. H. Fraser. 2000. Effects of low and high nutrients on the competitive hierarchy of 26 shoreline plants. Journal of Ecology 88:413-423. (Download PDF)

  15. Keddy, P.A. and L. H. Fraser. 1999. On the diversity of land plants. Ecoscience 6:366-380. (Download PDF)

  16. Keddy, P.A. 1999. Wetland restoration: the potential for assembly rules in the service of conservation. Wetlands 19:716-732. (Download PDF)

  17. Weiher, E. and P.A. Keddy. 1999. Relative abundance and evenness patterns along diversity and biomass gradients. Oikos 87:355-361.

  18. Keogh, T., P.A. Keddy and L. H. Fraser. 1999. Patterns of tree species richness in forested wetlands. Wetlands 19: 639-647.

  19. Keddy, P.A., L. H. Fraser, and I. C. Wisheu. 1998. A comparative approach to examine competitive response of 48 wetland plant species. Journal of Vegetation Science 9: 777-786.

  20. Hill, N. M., P.A. Keddy and I. C. Wisheu. 1998. A hydrological model for predicting the effects of dams on the shoreline vegetation of lakes and reservoirs. Environmental Management 22:723-736. (Download PDF)

  21. Le Page, C. and P. A. Keddy. 1998. Reserves of buried seeds in beaver ponds. Wetlands 18:242-248.

  22. Weiher, E., G. D. P. Clarke and P.A. Keddy. 1998. Community assembly rules, morphological dispersion, and the coexistence of plant species. Oikos 81: 309-322.

  23. Fraser, L. H. and P. Keddy. 1997. The role of experimental microcosms in ecological research. Trends in Ecology and Evolution 12: 478-481. (Download PDF)

  24. Keddy, P., L. Twolan-Strutt and B. Shipley. 1997. Experimental evidence that interspecific competitive asymmetry increases with soil productivity. Oikos 80: 253-256. (Download PDF)

  25. Toner, M. and P. Keddy. 1997. River hydrology and riparian wetlands: a predictive model for ecological assembly. Ecological Applications 7: 236-246. (Download PDF)

  26. Weiher, E., I. C. Wisheu, P.A. Keddy and D.R.J. Moore. 1996. Establishment, persistence, and management implications of experimental wetland plant communities. Wetlands 16: 208-218. (Download PDF)

  27. Wisheu, I. C., and P.A. Keddy. 1996. Three competing models for predicting the size of species pools: a test using eastern North American wetlands. Oikos 76: 253-258. (Download PDF)

  28. Keddy, P.A. and C.G. Drummond. 1996. Ecological properties for the evaluation, management, and restoration of temperate deciduous forest ecosystems. Ecological Applications 6: 748-762. (Download PDF)

  29. Twolan-Strutt, L. and P.A. Keddy. 1996. Above- and below-ground competition intensity in two contrasting wetland plant communities. Ecology 77: 259-270. (Download PDF)

  30. Weiher, E. and P.A. Keddy. 1995. Assembly rules, null models, and trait dispersion: new questions from old patterns. Oikos 74: 159-165. (Download PDF)

  31. Weiher, E. and P.A. Keddy. 1995. The assembly of experimental wetland plant communities. Oikos 73: 323-335. (Download PDF)

  32. Belcher, J., P.A. Keddy and L. Twolan-Strutt. 1995. Root and shoot competition along a soil depth gradient. Journal of Ecology 83: 673-682. (Download PDF)

  33. Gaudet, C.L. and P.A. Keddy. 1995. Competitive performance and species distribution in shoreline plant communities: a comparative approach. Ecology 76: 280-291. (Download PDF)

  34. McJannet, C.L., P.A. Keddy, and F. R. Pick. 1995. Nitrogen and phosphorus tissue concentrations in 41 wetland plants: a comparison across habitats and functional groups. Functional Ecology 9: 231-238. (Download PDF)

  35. Shipley, B. and P.A. Keddy. 1994. Evaluating the evidence for competitive hierarchies in plant communities. Oikos 69: 340-345.

  36. Keddy, P. 1994. Reflections on the 21st birthday of MacArthur's Geographical Ecology - applications of the Hertzprung-Russel star diagram to ecology. Trends in Ecology and Evolution 9: 231-234.

  37. Keddy, P.A., L. Twolan-Strutt and I. C. Wisheu 1994. Competitive effect and response ranking in 20 wetland plants: are they consistent across three environments? Journal of Ecology 82: 635-643. (Download PDF)

  38. Reader, R.J., S. D. Wilson, J.W. Belcher, I. Wisheu, P.A. Keddy, D. Tilman, E.C. Morris, J. B. Grace, J. B. McGraw, H. Olff, R. Turkington, E. Klein, Y. Leung, B. Shipley, R. Van Hulst, M.E. Johansson, C. Nilsson, J. Gurevitch, K. Grigulis, and B.E. Beisner. 1994. Intensity of plant competition in relation to neighbor biomass: an intercontinental study with Poa pratensis. Ecology 75: 1753-1760. (Download PDF)

  39. Wisheu, I. C. and P.A. Keddy. 1994. The low competitive ability of Canada's Atlantic coastal plain shoreline flora: implications for conservation. Biological Conservation 68: 247-252.

  40. Wisheu, I. C., C. J. Keddy, P.A. Keddy, and N.M. Hill. 1994. Disjunct Atlantic coastal plain species in Nova Scotia: distribution, habitat and conservation priorities. Biological Conservation 68: 217-224.

  41. Keddy, P.A. 1993. Do ecological communities exist? A reply to Bastow Wilson. Journal of Vegetation Science 4: 135-136.

  42. Wilson, S. D., D.R.J. Moore and P.A. Keddy 1993. Relationships of marsh seed banks to vegetation patterns along environmental gradients. Freshwater Biology 29: 361-370.

  43. Boutin, C. and P. A. Keddy. 1993. A functional classification of wetland plants. Journal of Vegetation Science 4: 591-600. (Download PDF)

  44. Keddy, P.A. 1993. A pragmatic approach to functional ecology. Functional Ecology 6: 621-626. (Download PDF)

  45. Wilson, S. D., D.R.J. Moore and P.A. Keddy. 1993. Relationships of marsh seed banks to vegetation patterns along environmental gradients. Freshwater Biology 29: 361-370.

  46. Wisheu, I. C. and P.A. Keddy. 1992. Competition and centrifugal organization of ecological communities: theory and tests. Journal of Vegetation Science 3: 147-156. (Download PDF)

  47. Keddy, P.A. 1992. Assembly and response rules: two goals for predictive community ecology. Journal of Vegetation Science 3: 157-164. (Download PDF)

  48. Belcher, J., P.A. Keddy and P.F.C. Catling. 1992. Alvar vegetation in Canada: a multivariate description at two scales. Canadian Journal of Botany 70: 1279-1291.

  49. Hill, N. and P.A. Keddy. 1992. Predicting numbers of rarities from habitat variables: coastal plain plants of Nova Scotian lakeshores. Ecology 73: 1852-1859. (Download PDF)

  50. Keddy, P.A. 1991. Plant competition and resources in old fields. Trends in Ecology and Evolution 6: 235-237.

  51. Shipley, B. S., P.A. Keddy, D.R.J. Moore and C. Gaudet. 1991. A model of species density in shoreline vegetation. Ecology 72: 1658-1667. (Download PDF)

  52. Shipley, B. S., P.A. Keddy and L. P. Lefkovitch. 1991 Mechanisms producing plant zonation along a water depth gradient: a comparison with the exposure gradient. Canadian Journal of Botany 69: 1420-1424. (Download PDF)

  53. Wilson, S. D. and P.A. Keddy. 1991. Competition, survivorship and growth in macrophyte communities. Freshwater Biology 25: 331-337.

  54. Johansson, M. E. and P.A. Keddy. 1991. Intensity and asymmetry of competition between plant pairs of different degrees of similarity - an experimental study on two guilds of wetland plants. Oikos 60: 27-34. (Download PDF)

  55. Wisheu, I. C. and P.A. Keddy. 1991. Seed banks of a rare wetland plant community: distribution patterns and effects of human induced disturbance. Journal of Vegetation Science 2: 181-188.

  56. McCanny, S. J., P.A. Keddy, T. J. Arnason, C.L. Gaudet, D.R.J. Moore and B. Shipley. 1990. Fertility and the food quality of wetland plants: a test of the resource availability hypothesis. Oikos 59: 373-381. (Download PDF)

  57. Keddy, P.A. and P. MacLellan. 1990. Centrifugal organization in forests. Oikos 58: 75-84. (Download PDF)

  58. Shipley, B., P.A. Keddy, D.R.J. Moore and K. Lemky. 1990. Regeneration and establishment strategies of emergent macrophytes. Journal of Ecology 77: 1093-1110. (Download PDF)

  59. Moore, D.R.J. and P.A. Keddy. 1989. The relationship between species richness and standing crop in wetlands: the importance of scale. Vegetatio 79: 99-106. (Download PDF)

  60. Keddy, P.A. 1989. Effects of competition from shrubs on herbaceous wetland plants: a four year field experiment. Canadian Journal of Botany 67: 708-716. (Download PDF)

  61. Mailette, L. and P.A. Keddy. 1989. Two plants with contrasting architectures: growth responses to light gradients. Canadian Journal of Botany 67: 2825-2828.

  62. Keddy, P.A. and I. C. Wisheu. 1989. Species richness-standing crop relationships along four lakeshore gradients: constraints on the general model. Canadian Journal of Botany 67: 1609-1617.

  63. Keddy, P.A. and I. C. Wisheu. 1989. Ecology, biogeography and conservation of coastal plain plants: some general principles from the study of Nova Scotia wetlands. Rhodora 91: 72-94.(Download PDF)

  64. Moore, D.R.J., P.A. Keddy, C.L. Gaudet and I. C. Wisheu. 1989. Conservation of wetlands: do infertile wetlands deserve a higher priority? Biological Conservation 47: 203-217 (Download PDF)

  65. Wisheu, I. C. and P.A. Keddy. 1989. The conservation and management of a threatened coastal plain plant community in Eastern North America (Nova Scotia, Canada). Biological Conservation 48: 229-238. (Download PDF)

  66. Keddy, P.A. and B. Shipley. 1989. Competitive hierarchies in herbaceous plant communities. Oikos 54: 234 241. (Download PDF)

  67. Nilsson, C. and P.A. Keddy. 1988. Predictability of change in shoreline vegetation along a hydro electric reservoir, Northern Sweden. Canadian Journal of Fisheries and Aquatic Sciences 45:1896 1904.

  68. Shipley, B. and P.A. Keddy. 1988. The relationship between relative growth rate and sensitivity to nutrient stress in twenty eight emergent macrophytes. Journal of Ecology 76: 1101 1110.(Download PDF)

  69. Gaudet, C.L. and P.A. Keddy. 1988. Predicting competitive ability from plant traits: a comparative approach. Nature 334:242 243. (Download PDF)

  70. Wilson, S. D. and P.A. Keddy. 1988. Survivorship, biomass accumulation and species richness along an environmental gradient. Oikos 53:375 380.

  71. Day, R., P.A. Keddy, J. McNeill and T. Carleton. 1988. Fertility and disturbance gradients: a summary model for riverine marsh vegetation. Ecology 69:1044 1054. (Download PDF)

  72. Moore, D.R.J. and P.A. Keddy. 1988. Effects of a water depth gradient on the germination of lakeshore plants. Canadian Journal of Botany 66:548 552.

  73. Shipley, B. and P. Keddy. 1987. The individualistic and community unit concepts as falsifiable hypotheses. Vegetatio 69:47 55.(Download PDF)

  74. Keddy, P.A. 1987. Beyond reductionism and scholasticism in plant community ecology. Vegetatio 69:209 211.

  75. Isabelle, P.S., L.J. Fooks, P.A. Keddy and S. D. Wilson. 1987. Effects of roadside snowmelt on wetland vegetation: an experimental study. Journal of Environmental Management 25: 57 60.

  76. Wilson, S. D. and P.A. Keddy. 1986. Species competitive ability and position along a natural stress/disturbance gradient. Ecology 67:1236 1242. (Download PDF)

  77. Wilson, S. D. and P.A. Keddy. 1986. Measuring diffuse competition along an environmental gradient: results from a shoreline plant community. The American Naturalist 127: 862 869. (Download PDF)

  78. Keddy, P.A. and A. A. Reznicek. 1986. Great Lakes vegetation dynamics: the role of fluctuating water levels and buried seeds. Journal of Great Lakes Research 12:25 36. (Download PDF)

  79. Keddy, P.A. and P. Constabel. 1986. Germination of ten shoreline plants in relation to seed size, soil particle size and water level: an experimental study. Journal of Ecology 74:133 141.

  80. Sharp, M. J. and P. A. Keddy. 1985. Biomass accumulation by Rhexia virginica and Triadenum fraseri along two lakeshore gradients: a field experiment. Canadian Journal of Botany 63:1806 1810.

  81. Keddy, P.A. and T.H. Ellis. 1985. Seedling recruitment of 11 wetland plant species along a water level gradient: shared or distinct responses? Canadian Journal of Botany 63: 1876 1879.

  82. Wilson, S. D. and P.A. Keddy. 1985. Plant zonation on a lakeshore gradient: physiological response curves of component species. Journal of Ecology 73:851 860. (Download PDF)

  83. Sharp, M. J. and P.A. Keddy. 1985. A quantitative technique for estimating the boundaries of wetlands from vegetation data. Environmental Management 10:107 112.

  84. Keddy, P.A. 1985. Lakeshore plants in the Tusket River Valley, Nova Scotia: the distribution and status of some rare species including Coreopsis rosea and Sabatia kennedyana. Rhodora 87:309 320. (Download PDF)

  85. Wilson, S. D., P.A. Keddy,and D. L. Randall. 1985. The distribution of Xyris difformis Chapman along an environmental gradient: an experimental study. Canadian Journal of Botany 63:1226 1230.

  86. Wilson, S. D. and P.A. Keddy. 1985. The shoreline distribution of Juncus pelocarpus along a gradient of exposure to waves: an experimental study. Aquatic Botany 21:277 284.

  87. Keddy, P.A. 1985. Wave disturbance on lakeshores and the within lake distribution of Ontario's Atlantic coastal plain flora. Canadian Journal of Botany 63:656 660.

  88. Reznicek, A. A. and P.A. Keddy. 1985. Water levels and wetland areas -- a commentary. Journal of Surveying Engineering.

  89. Keddy, P.A. 1984. Plant zonation on lakeshores in Nova Scotia: a test of the resource specialisation hypothesis. Journal of Ecology 72:797 808.

  90. Poslusny, U., M. J. Sharp, and P.A. Keddy. 1984. Vegetative propagation in Rhexia virginica (Melastomataceae); some morphological and ecological considerations. Canadian Journal of Botany 62:2118 2121.

  91. Keddy, C. J. and P.A. Keddy. 1984. Reproductive biology of Cirsium pitcheri (Asteraceae). Michigan Botanist 23:57 67.

  92. Keddy, P.A. 1984. Quantifying a within lake gradient of wave energy in Gillfillan Lake, Nova Scotia. Canadian Journal of Botany 62:301 309.

  93. Nicholson, A. and P.A. Keddy. 1983. The depth profile of a shoreline seed bank in Matchedash Lake, Ontario. Canadian Journal of Botany 61:3293 3296.

  94. Keddy, P.A. 1983. Shoreline vegetation in Axe Lake, Ontario: effects of exposure on zonation patterns. Ecology 64: 331 344. (Download PDF)

  95. Keddy, P.A. 1983. Freshwater wetlands human induced changes: indirect effects must also be considered. Environmental Management 4:299 302

  96. Keddy, C. J., P.A. Keddy and R.J. Planck. 1983. An ecological study of Cypripedium passerinum Rich. (Sparrow's Egg Lady slipper, Orchidaceae) on the north shore of Lake Superior. Canadian Field Naturalist 97:268 274.

  97. Keddy, P.A. and A. A. Reznicek. 1982. The role of seed banks in the persistence of Ontario's coastal plain flora. American Journal of Botany 69:13-22. (Download PDF)

  98. Keddy, P.A. 1982. Quantifying within lake gradients of wave energy: interrelationships of wave energy, substrate particle size and shoreline plants in Axe Lake, Ontario. Aquatic Botany 14:41-58.

  99. Keddy, P.A. 1982. Population ecology on an environmental gradient: Cakile edentula on a sand dune. Oecologia 52: 348-355.

  100. Keddy, P.A. 1981. Vegetation with Atlantic coastal plain affinities in Axe Lake, near Georgian Bay, Ontario. Canadian Field Naturalist 95:241-248. (Download PDF)

  101. Keddy, P.A. 1981. Why gametophytes and sporophytes are different: form and function in a terrestrial environment. The American Naturalist 118: 452-454.

  102. Keddy, P.A. 1981. Experimental demography of the sand dune annual, Cakile edentula, growing along an environmental gradient. The Journal of Ecology 69:615-630.

  103. Keddy, P.A. 1980. Population ecology in an environmental mosaic: Cakile edentula on a gravel bar. Canadian Journal of Botany 58:1095-1100.

  104. Keddy, P.A., A.J. Spavold and C. J. Keddy. 1979. Snowmobile impact on old field and marsh vegetation in Nova Scotia, Canada: an experimental study. Environmental Management 3:409- 415.

  105. Keddy, P.A. 1976. Lakes as islands: the distributional ecology of two aquatic plants, Lemna minor L. and L. trisulca L. Ecology 57:163-359. (Download PDF)

  106. Britton, D.M., C.J. Widén, D.F. Brunton and P.A. Keddy. 1975. A new hybrid woodfern, Dryopteris X algonquinensis D. M. Britton, from Algonquin Park, Ontario. Canadian Field-Naturalist 89:163-171

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