Peter Klinkhamer

(in cooperation with T.J. de Jong):
Evolutionary Ecology of Plant Reproductive Strategies (2005) Cambridge University Press
CLICK HERE
Chapters:
Optimisation models
Investments, returns and proportionality
Gain curves
Evolutionarily stable strategies: sex allocation strategies as an example
Size at flowering
Reproductive effort
Size and number trade-offs: an example using evolution of seed size
Sex allocation theory for partially selfing plants
Size-dependent sex allocation
Sex ratios in dioecious plants
Outcrossing, selfing or no sex at all?
Heterostyly
Selective abortion
Pollinator attraction: advertising and reward
Parent-offspring conflict
Intragenomic conflict
Kin selection and group selection.

· 1977-1980 various student assistantships
· 1980-1981 RUU (University of Utrecht), development simulation model nutrient cycling in dry heathland ecosystems.
· 1981-1985 UL (University of Leiden), PhD position (parttime 0,5)>
· 1984-1987 UL, external BION-funding (parttime 0,5)
· 1987-1989 UL, UD (assistent professor (parttime 0,5)
· 1989-1996 UL, UD (assistent professor (parttime 0,8)
· 1996- present UL UHD (associate professor (parttime 0,8)
I’m presently Director of Education and section leader of Plant Ecology at the Institute of Biology Leiden IBL. The section has three research themes 1. Evolution of plant life histories 2. Evolution of plant defence systems and 3. plant-microbial interactions

A developing embryo of Cynoglossum officinale

Scientific background:
After starting out on population dynamics of biennial plants, my research interest shifted towards evolutionary questions related to plant defence and plant reproductive systems. With various colleagues (but mostly with Tom de Jong) I worked on evolution of semelparity, age of first reproduction, attractiveness, selective abortion, sex allocation and diversity of secondary metabolites. All these projects have a simlar approach. The starting point is a theoretical framework. Modelling and studing the most relevant ecological processes allows us to use experimental data to test quantitative and qualitative predictions on evolution and optimization. The life history work resulted in a book that is due to appear in November 2005 (De Jong TJ and Klinkhamer PGL: Evolution of Plant Reproductive Strategies, Cambridge University Press).
Presently and in the (near) future one of my new projects will be on "key factors in evolution and the diversification of plant species". This project is carried out in cooperation with Klaas Vrieling. As a model system we will use hybrids of Senecio species that occur in contrasting habitats. By producing an F2 generation of these hybrids it is possible to generate maximum variation of relevant traits against an, on average, equal genetic background. The research approach is to test the fitness of these hybrids in different environments and to determine the most relevant ecological processes. After having produced a genetic map, fitness-related molecular markers will be detected using QTL-analysis. Similarly we will detect fitness-related metabolites by e.g. NMR-analysis of (groups of ) F2-plants with low and high fitness. Analogous to QTL-analysis we call this new approach Quantitative Compound Analysis (QTC). This will be done in co-operation with the metabolomics group of the IBL. The importance of the identified QTC's will further be studied in bioassays. Combining QTL- and QTC- analysis will show if the fitness-related molecular markers are likely to represent genes coding for the identified compounds. In a later stage the actual genes can be identified and sequenced in cooperation with the molecular groups of the IBL. The distribution of compounds (and genes) among Senecio species together with their phylogeny will make it possible to study the evolutionary history of the trait. We have chosen to start this project by focussing on a potentially ecologically and economically important trait: resistance against herbivores and soil-born pathogens. Whenever possible the results on resistance will be incorporated in our research on resistance in Chrysanthemums. In addition we will start a parallel project with a similar approach using hybrids between inbred lines of Arabidopsis thaliana from contrasting habitats. Although we started an ecological study in a small number of populations, the latter project basically has to be started yet but will have the advantage that it is easier to cooperate with the molecular groups of the IBL and, of course, much more molecular information is already available. Running projects I will still be involved in include: selective abortion, the effects of habitat fragmentation on multitrophic systems, and the interacting effects between small scale population structure and adaptive traits on plant fitness.

Bachelor phase:
- first year field excursions
- teacher course theoretical biology
- supervisor bachelor research projects
- teacher field course plant ecology (3 weeks)
- teacher first year practical ecology (5 afternoons)
Master phase:
- coordinator master track Evolutionary and Ecological Sciences
- coordinator master course General Research Skills (8 weeks)
- coordinator master course Theoretical Overview ESS (9 weeks)
- supervisor discussion group plant-herbivore relationships (12 afternoons)
- teacher course life-histories of the research school Function Ecology
- supervisor master research projects

Many of our student projects involve field work at the dunes of Meijendel, near the Hague

PhD's

Committees:
- Dr. L. Soldaat: member opposition committee (1991)
- Dr. P. Boudry: extern member exam committee (University Lille, France) (1994)
- Dr. C.M. de Jager: member promotion committee (1995)
- Dr. N. van Dam: member promotion committee (1995)
- Dr. M. Rademaker: member promotion committee (1998)
- Dr. S. Geritz: member promotion committee (1998)
- Dr H. van Ginkel: member promotion committee (1999)
- Dr. S. Goubitz member promotion committee (University Utrecht) (2001)
- Dr. J. Bruggeman member promotion committee (University Wageningen) (2003)
- Dr. Hol: member promotion committee (2003)
- Dr. M. Blomquist: member promotion committee (2004)
- Dr. J. Falcao Salles member opposition committee (2005)
- Dr. A.M. Cascante Marin: opposition committee (University of Amsterdam) (2006)
- Dr. B. Pollux: member of the opposition committee (University of Nijmegen) (2007)
- Drs. R. van Grunsven: member of the opposition committee (University of
Wageningen (December 2008)
- Drs. B. Drigo: member of opposition committee (2008)
- Drs. S. Hoppener-Ogawa: member of opposition committee (2008)

Co-promotor:
- Dr. R.A. Wesselingh: co-promotor (1995)
- Dr. C. Melser: co-promotor (2002)
- Dr. M. Macel: co-promotor (2003)
- Dr. G. Korbecka co-promotor (2004)
- Dr. M. Stang co-promotor (2007)
- Drs. S. Esch co-promotor (expected 2009)
- Drs. H. Kirk co-promotor (expected 2009)
- L. Joosten co-promotor (expected 2010)
- D.-D. Chang co-promotor (expected 2011)
- M. Mirnezhad co-promotor (expected 2011)
- A. Plischke co-promotor (expected 2012)

Primary publications in international journals:

• 93 Leiss, K.A., Peet M.and P.G.L. Klinkhamer. Does spatial aggregation of nectar reward lead to genetic structure? Basic and Applied Ecology (in press)
• 92 M. Stang, P.G.L. Klinkhamer, N.M. Waser, E. van der Meijden. Both constraints and abundance are needed to explain the topology of mutualistic networks. PLOS biology 2007. doi=10.1371/journal.pbio.005003.
• 91 M. Stang, P.G.L. Klinkhamer, E. van der Meijden. Asymmetric specialization and extinction risk in plant – flower visitor webs: a matter of morphology or abundance? Oecologia, 2007. 151: 442-453.
• 90. Stang M, Klinkhamer PGL, Meijden E van der. Size constraints and flower abundance determine the number of interactions in a plant-flower visitation web. Oikos 2006. 112: p. 111-121
• 89. Esch S, Klinkhamer PGL, Meijden E van der. Do small distances and host density affect the distribution of a specialist parasitoid?. Oecologia 2005. 146: p. 218-226
• 88. Macel, M, Klinkhamer PGL Differences in effects of pyrrolizidine alkaloids on five
  generalist insect herbivore species. Journal of Chemical Ecology, 2005. 31(7): p.1493-1508.
• 87. Kirk, H, Vrieling K, Klinkhamer PGL. Reproductive Fitness of Hybrids Between
  Senecio jacobaea and Senecio aquaticus. American Journal of Botany, 2005. 92(9): p. 1467-1473.
• 86. K.A. Leiss, P.G.L Klinkhamer. Spatial distribution of nectar production in a natural
  Echium vulgare population: implications for pollinator behaviour.Basic and Applied Ecology, 2005. 6. p. 317-324.
• 85. K.A. Leiss, P.G.L.Klinkhamer. Genotype by environment interactions in the nectar production of Echium vulgare. Functional Ecology, 2005. 19. p. 454-459.
• 84. Kirk H, Vrieling K, Klinkhamer PGL. Maternal Effects and Heterosis Influence the
  Fitness of Plant Hybrids. New Phytologist, 2005. 166(2). P. 685-694.
• 83. Jong, T.J. de, van Dijk, H. and P.G.L. Klinkhamer. Hamelton's rule, imprinting and parent-offspring conflict over seed mass in partially selfing plants. Journal of Evolutionary Biology, 2005. 18. p. 676-682.
• 82. Cadet, C., J.A.J. Metz and P.G.L. Klinkhamer, Size and the not-so-single sex:
  disentangling the effects of size and budget on sex allocation in hermaphrodites. American Naturalist, 2004. 164(6). P. 779-792.
• 81. Macel, M., K. Vrieling, and P.G.L. Klinkhamer, Variation in pyrrolizidine alkaloid patterns of Senecio jacobaea. Phytochemistry, 2004. 65(7): p. 865-873.
• 80. Leiss, K.A., K. Vrieling, and P.G.L. Klinkhamer, Heritability of nectar production in Echium vulgare. Heredity, 2004. 92(5): p. 446-451
• 79. Klinkhamer, P.G.L. and P.P. van der Lugt, Pollinator service only depends on nectar production rates in sparse populations. Oecologia, 2004. 140(3): p. 491-494.
• 78. Kirk, H., Macel, M., Klinkhamer, P.G.L. and K. Vrieling. Natural hybridization between Senecio jacobaea and Senecio aquaticus: molecular and chemical evidence. Molecular Ecology, 2004. 13(8): p. 2267-2274.
• 77. Blomqvist, M.M., Vos,P., Klinkhamer, P.G.L. and W.J. ter Keurs. Declining plant species richness of grassland ditch banks - a problem of colonisation or extinction? Biological Conservation, 2003. 109(3): p. 391-406.
• 76. Macel, M., Klinkhamer, P.G.L., Vrieling, K., and E. van der Meijden. Diversity of pyrrolizidine alkaloids in Senecio species does not affect the specialist herbivore Tyria jacobaeae. Oecologia, 2002. 133(4): p. 541-550.
• 75. Kowalchuk, G.A., Buma, D.S., de Boer, W., Klinkhamer, P.G.L. and J.A. van Veen. Effects of above-ground plant species composition and diversity on the diversity of soil-borne microorganisms. Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology, 2002. 81(1-4): p. 509-520.
• 74. Korbecka, G., P.G.L. Klinkhamer, and K. Vrieling, Selective embryo abortion hypothesis revisited - A molecular approach. Plant Biology, 2002. 4(3): p. 298-310.
• 73. Melser, C. and P.G.L. Klinkhamer, Selective seed abortion increases offspring survival in Cynoglossum officinale (Boraginaceae). American Journal of Botany, 2001. 88(6): p. 1033-1040.
• 72. Klinkhamer, P.G.L., T.J. de Jong, and L.A. Linnebank, Small-scale spatial patterns determine ecological relationships: an experimental example using nectar production rates. Ecology Letters, 2001. 4(6): p. 559-567.
• 71. van der Meijden, E. and P.G.L. Klinkhamer, Conflicting interests of plants and the natural enemies of herbivores. Oikos, 2000. 89(1): p. 202-208.
• 70. Jong, T.J., de and P.G.L. Klinkhamer, Flowering right on time. Flowering Newsletter, 2000: p. 15-21.
• 69. de Jong, T.J., P.G.L. Klinkhamer, and J.L.H. de Heiden, The evolution of generation time in metapopulations of monocarpic perennial plants: some theoretical considerations and the example of the rare thistle Carlina vulgaris. Evolutionary Ecology, 2000. 14(3): p. 213-231.
• 68. Vrieling, K., Saumitou-Laprade, P., Cugues, J., van Dijk, H., de Jong, T.J. and Klinkhamer, P.G.L. Direct and indirect estimates of the selfing rate in small and large individuals of the bumblebee pollinated Cynoglossum officinale L (Boraginaceae). Ecology Letters, 1999. 2(5): p. 331-337.
• 67. Rademaker, M.C.J. and P.G.L. Klinkhamer, Size-dependent sex allocation in Cynoglossum officinale for different genotypes under uniform favourable conditions. Plant Biology, 1999. 1(1): p. 108-114.
• 66. Pappers, S.M., Klinkhamer, P.G.L., de Jong, T.J. and Meelis, E. Effects of nectar content on the number of bumblebee approaches and the length of visitation sequences in Echium vulgare (Boraginaceae). Oikos, 1999. 87(3): p. 580-586.
• 65. Melser, C., A. Bijleveld, and P.G.L. Klinkhamer, Late-acting inbreeding depression in both male and female function of Echium vulgare (Boraginaceae). Heredity, 1999. 83: p. 162-170.
• 64. Klinkhamer, P.G.L. and C.A.M. van der Veen-van Wijk, Genetic variation in floral traits of Echium vulgare. Oikos, 1999. 85(3): p. 515-522.
• 63. De Jong, T.J., P.G.L. Klinkhamer, and M.C.J. Rademaker, How geitonogamous selfing affects sex allocation in hermaphrodite plants. Journal of Evolutionary Biology, 1999. 12(1): p. 166-176.
• 62. De Jong, T.J., L. Goosen-De Roo, and P.G.L. Klinkhamer, Is the threshold size for flowering in Cynoglossum officinale fixed or dependent on environment? New Phytologist, 1998. 138(3): p. 489-496.
• 61. Wesselingh, R.A., Klinkhamer, P.G.L., de Jong, T.J. and L.A. Boorman. Threshold size for flowering in different habitats: Effects of size-dependent growth and survival. Ecology, 1997. 78(7): p. 2118-2132.
• 60. Rademaker, M.C.J., T.J. deJong, and P.G.L. Klinkhamer, Pollen dynamics of bumble-bee visitation on Echium vulgare. Functional Ecology, 1997. 11(5): p. 554-563.
• 59. Melser, C., M.C.J. Rademaker, and P.G.L. Klinkhamer, Selection on pollen donors by Echium vulgare (Boraginaceae). Sexual Plant Reproduction, 1997. 10(5): p. 305-312.
• 58. Klinkhamer, P.G.L., T.J. deJong, and H. Metz, Sex and size in cosexual plants. Trends in Ecology & Evolution, 1997. 12(7): p. 260-265.
• 57. Klinkhamer, P.G.L., T. Kubo, and Y. Iwasa, Herbivores and the evolution of the semelparous perennial life-history of plants. Journal of Evolutionary Biology, 1997. 10(4): p. 529-550.
• 56. Wesselingh, R.A. and P.G.L. Klinkhamer, Threshold size for vernalization in Senecio jacobaea: Genetic variation and response to artificial selection. Functional Ecology, 1996. 10(2): p. 281-288.
• 55. Vrieling, K., de Jong, T.J., Klinkhamer, P.G.L., van der Meijden, E. and van der Veen-van Wijk, C.A.M. Testing trade-offs among growth, regrowth and anti-herbivore defences in Senecio jacobaea. Entomologia Experimentalis Et Applicata, 1996. 80(1): p. 189-192.
• 54. Klinkhamer, P.G.L., T.J. deJong, and J.L.H. deHeiden, An eight-year study of population dynamics and life-history variation of the ''biennial'' Carlina vulgaris. Oikos, 1996. 75(2): p. 259-268.
• 53. Iwasa, Y., T.J. Dejong, and P.G.L. Klinkhamer, Why Pollinators Visit Only a Fraction of the Open Flowers on a Plant - the Plants Point-of-View. Journal of Evolutionary Biology, 1995. 8(4): p. 439-453.
• 52. deJong, T.J., P.G.L. Klinkhamer, and J.L.H. deHeiden, The effect of water and mycorrhizal infection on the distribution of Carlina vulgaris on sand dunes. Ecography, 1995. 18(4): p. 384-389.
• 51. dejager, C.M., Butot, R.P.T., Klinkhamer, P.G.L. and E. van der Meijden. Chemical Characteristics of Chrysanthemum Cause Resistance to Frankliniella-Occidentalis (Thysanoptera, Thripidae). Journal of Economic Entomology, 1995. 88(6): p. 1746-1753.
• 50. deJager C.M., Butot R.P.T., Klinkhamer P.G.L., deJong T.J., Wolff K, van der Meijden E. 1995. Genetic variation in chrysanthemum for resistance to Frankliniella occidentalis. Entomologia Experimentalis et Applicata 77(3): 277-287.
• 49. Wesselingh, R.A., Klinkhamer, P.G.L., de Jong, T.J. and E.G.M. Schlatman. A Latitudinal Cline in Vernalization Requirement in Cirsium Vulgare. Ecography, 1994. 17(3): p. 272-277.
• 48. Klinkhamer, P.G.L., T.J. Dejong, and J.A.J. Metz, Why Plants Can Be Too Attractive - a Discussion of Measures to Estimate Male Fitness. Journal of Ecology, 1994. 82(1): p. 191-194.
• 47. Klinkhamer, P.G.L., T.J. Dejong, and H.W. Nell, Limiting Factors for Seed Production and Phenotypic Gender in the Gynodioecious Species Echium Vulgare (Boraginaceae). Oikos, 1994. 71(3): p. 469-478.
• 46. Dejong, T.J. and P.G.L. Klinkhamer, Plant Size and Reproductive Success through Female and Male Function. Journal of Ecology, 1994. 82(2): p. 399-402
• 45. Wesselingh, R.A., de Jong, T.J., Klinkhamer, P.G.L., van Dijk, M.J. and E.G.M. Schlattman. Geographical Variation in Threshold Size for Flowering in Cynoglossum-Officinale. Acta Botanica Neerlandica, 1993. 42(1): p. 81-91.
• 44. Lamont, B.B. and P.G.L. Klinkhamer, Population-Size and Viability. Nature, 1993. 362(6417): p. 211-211.
• 43. Lamont, B.B., P.G.L. Klinkhamer, and E.T.F. Witkowski, Population Fragmentation May Reduce Fertility to Zero in Banksia-Goodii - a Demonstration of the Allee Effect. Oecologia, 1993. 94(3): p. 446-450.
• 42. Klinkhamer, P.G.L. and T.J. Dejong, Attractiveness to Pollinators - a Plants Dilemma. Oikos, 1993. 66(1): p. 180-184.
• 41. Klinkhamer, P.G.L. and T.J. Dejong, Cirsium-Vulgare (Savi) Ten - (Carduus-Lanceolatus L, Cirsium-Lanceolatum (L) Scop, Non Hill). Journal of Ecology, 1993. 81(1): p. 177-191.
• 40. Klinkhamer, P.G.L. and T.J. Dejong, Phenotypic Gender in Plants - Effects of Plant Size and Environment on Allocation to Seeds and Flowers in Cynoglossum-Officinale. Oikos, 1993. 67(1): p. 81-86.
• 39. deJong, T.J., N.M. Waser, and P.G.L. Klinkhamer, Geitonogamy - the Neglected Side of Selfing. Trends in Ecology & Evolution, 1993. 8(9): p. 321-325.
• 38. deJager, C.M., Butot, R.P.T., de Jong, T.J., Klinkhamer, P.G.L. and E. van der Meijden. Population-Growth and Survival of Western Flower Thrips Frankliniella-Occidentalis Pergande (Thysanoptera, Thripidae) on Different Chrysanthemum Cultivars - 2 Methods for Measuring Resistance. Journal of Applied Entomology-Zeitschrift Fur Angewandte Entomologie, 1993. 115(5): p. 519-525.
• 37. Vrieling, K., T.J. Jong, de, and P.G.L. Klinkhamer, Population dynamics of monocarpic perennials. Verhandlungen der Gesellschaft fuer Oecologie, 1992. 21: p. 295-301.
• 36. vanderMeijden, E., Klinkhamer, P.G.L., de Jong, T.J. and C.A.M. van Wijk. Meta-Population Dynamics of Biennial Plants - How to Exploit Temporary Habitats. Acta Botanica Neerlandica, 1992. 41(3): p. 249-270.
• 35. Prins, A.H., H.W. Nell, and P.G.L. Klinkhamer, Size-Dependent Root Herbivory on Cynoglossum-Officinale. Oikos, 1992. 65(3): p. 409-413.
• 34. Klinkhamer, P.G.L., de Jong, T.J. and E. Meelis. On the Analysis of Size-Dependent Reproductive Output in Plants. Functional Ecology, 1992. 6(3): p. 308-316.
• 33. Dejong, T.J., P.G.L. Klinkhamer, and M.J. Vanstaalduinen, The Consequences of Pollination Biology for Selection of Mass or Extended Blooming. Functional Ecology, 1992. 6(5): p. 606-615.
• 32. Klinkhamer, P.G.L., T.J. Dejong, and E. Meelis, The Control of Flowering in the Monocarpic Perennial Carlina-Vulgaris. Oikos, 1991. 61(1): p. 88-95.
• 31. Klinkhamer, P.G.L., T.J. Dejong, and R.A. Wesselingh, Implications of Differences between Hermaphrodite and Female Flowers for Attractiveness to Pollinators and Seed Production. Netherlands Journal of Zoology, 1991. 41(2-3): p. 130-143.
• 30. Dejong, T.J. and P.G.L. Klinkhamer, Early Flowering in Cynoglossum-Officinale L Constraint or Adaptation. Functional Ecology, 1991. 5(6): p. 750-756.
• 29. Prins, A.H., Vrieling, K., Klinkhamer, P.G.L. and de Jong, T.J. Flowering Behavior of Senecio-Jacobaea - Effects of Nutrient Availability and Size-Dependent Vernalization. Oikos, 1990. 59(2): p. 248-252.
• 28. Klinkhamer, P.G.L., T.J. Dejong, and E. Meelis, How to Test for Proportionality in the Reproductive Effort of Plants. American Naturalist, 1990. 135(2): p. 291-300.
• 27. Klinkhamer, P.G.L. and T.J. Dejong, Effects of Plant Size, Plant-Density and Sex Differential Nectar Reward on Pollinator Visitation in the Protandrous Echium-Vulgare (Boraginaceae). Oikos, 1990. 57(3): p. 399-405.
• 26. deJong, T.J., P.G.L. Klinkhamer, and L.A. Boorman, Biological Flora of the British-Isles. Journal of Ecology, 1990. 78(4): p. 1123-1144.
• 25. Klinkhamer, P.G.L., T.J. Dejong, and G.J. Debruyn, Plant Size and Pollinator Visitation in Cynoglossum-Officinale. Oikos, 1989. 54(2): p. 201-204.
• 24. Klinkhamer, P.G.L. and T.J. Dejong, A Deterministic Model to Study the Importance of Density-Dependence for Regulation and the Outcome of Intra-Specific Competition in Populations of Sparse Plants. Acta Botanica Neerlandica, 1989. 38(1): p. 57-65.
• 23. deJong, T.J. and P.G.L. Klinkhamer, Size-Dependency of Sex-Allocation in Hermaphroditic, Monocarpic Plants. Functional Ecology, 1989. 3(2): p. 201-206.
• 22. deJong, T.J. and P.G.L. Klinkhamer, Limiting Factors for Seed Production in Cynoglossum-Officinale. Oecologia, 1989. 80(2): p. 167-172.
• 21. deJong, T.J., Klinkhamer, P.G.L., Geritz, S.A.H. and E. van der Meijden. Why Biennials Delay Flowering - an Optimization Model and Field Data on Cirsium-Vulgare and Cynoglossum-Officinale. Acta Botanica Neerlandica, 1989. 38(1): p. 41-55.
• 20. Klinkhamer, P.G.L. and T.J. Jong, de, Life history variation and the control of flowering in wild populations of short-lived monocarps. Flowering Newsletter, 1988. 5: p. 19-22.
• 19. Klinkhamer, P.G.L., T.J. Dejong, and E. Vandermeijden, Production, Dispersal and Predation of Seeds in the Biennial Cirsium-Vulgare. Journal of Ecology, 1988. 76(2): p. 403-414.
• 18. Klinkhamer, P.G.L. and T.J. Dejong, The Importance of Small-Scale Disturbance for Seedling Establishment in Cirsium-Vulgare and Cynoglossum-Officinale. Journal of Ecology, 1988. 76(2): p. 383-392.
• 17. Geritz, S.A.H., Metz, J.A.J., Klinkhamer, P.G.L. and T.J. de Jong. Competition in Safe-Sites. Theoretical Population Biology, 1988. 33(2): p. 161-180.
• 16. deJong, T.J. and P.G.L. Klinkhamer, Seedling Establishment of the Biennials Cirsium-Vulgare and Cynoglossum-Officinale in a Sand-Dune Area - the Importance of Water for Differential Survival and Growth. Journal of Ecology, 1988. 76(2): p. 393-402.
• 15. deJong, T.J. and P.G.L. Klinkhamer, Population Ecology of the Biennials Cirsium-Vulgare and Cynoglossum-Officinale in a Coastal Sand-Dune Area. Journal of Ecology, 1988. 76(2): p. 366-382.
• 14. Klinkhamer, P.G.L., T.J. Dejong, and E. Meelis, Life-History Variation and the Control of Flowering in Short-Lived Monocarps. Oikos, 1987. 49(3): p. 309-314.
• 13. Klinkhamer, P.G.L., T.J. Dejong, and E. Meelis, Delay of Flowering in the Biennial Cirsium-Vulgare - Size Effects and Devernalization. Oikos, 1987. 49(3): p. 303-308.
• 12. Klinkhamer, P.G.L., de Jong, T.J., Metz, J.A.J. and J. Val. Life-History Tactics of Annual Organisms - the Joint Effects of Dispersal and Delayed Germination. Theoretical Population Biology, 1987. 32(1): p. 127-156.
• 11. Klinkhamer, P.G.L. and T.J. Dejong, Plant Size and Seed Production in the Monocarpic Perennial Cynoglossum-Officinale L. New Phytologist, 1987. 106(4): p. 773-783.
• 10. deJong, T.J., et al., Growth and Nutrient Accumulation of the Biennials Cirsium Vulgare and Cynoglossum Officinale under Nutrient-Rich Conditions. Oikos, 1987. 48(1): p. 62-72.
• 9. deJong, T.J., P.G.L. Klinkhamer, and J.A.J. Metz, Selection for Biennial Life Histories in Plants. Vegetatio, 1987. 70(3): p. 149-156.
• 8. deJong, T.J., P.G.L. Klinkhamer, and A.H. Prins, Flowering Behavior of the Monocarpic Perennial Cynoglossum-Officinale L. New Phytologist, 1986. 103(1): p. 219-229.
• 7. Klinkhamer, P.G.L. and T.J. Dejong, Shoot Biomass and Species Richness in Relation to Some Environmental-Factors in a Coastal Dune Area in the Netherlands. Vegetatio, 1985. 63(3): p. 129-132.
• 6. deJong, T.J. and P.G.L. Klinkhamer, The Negative Effects of Litter of Parent Plants of Cirsium-Vulgare on Their Offspring - Autotoxicity or Immobilization. Oecologia, 1985. 65(2): p. 153-160.
• 5. Geritz, S.A.H., T.J. Dejong, and P.G.L. Klinkhamer, The Efficacy of Dispersal in Relation to Safe Site Area and Seed Production. Oecologia, 1984. 62(2): p. 219-221.
• 4. Metz, J.A.J., T.J. Dejong, and P.G.L. Klinkhamer, What Are the Advantages of Dispersing - a Paper by Kuno Explained and Extended. Oecologia, 1983. 57(1-2): p. 166-169.
• 3. Klinkhamer, P.G.L. and T.J. Dejong, Is It Profitable for Biennials to Live Longer Than 2 Years. Ecological Modelling, 1983. 20(2-3): p. 223-232.
• 2. Klinkhamer, P.G.L., T.J. Dejong, and J.A.J. Metz, An Explanation for Low Dispersal Rates - a Simulation Experiment. Netherlands Journal of Zoology, 1983. 33(4): p. 532-541.
• 1. deJong, T.J. and P.G.L. Klinkhamer, A Simulation-Model for the Effects of Burning on the Phosphorus and Nitrogen-Cycle of a Heathland Ecosystem. Ecological Modelling, 1983. 19(4): p. 263-284.

In Press:


· Leiss, K.A., Peet M.and P.G.L. Klinkhamer. Does spatial aggregation of nectar reward
lead to genetic structure? Basic and Applied Ecology (in press)

Dutch publications:

1 Jong, T.J. de, Klinkhamer, P.G.L. (1985). De relatie tussen soortenrijkdom aan planten en de faktoren concur­rentie, stress en verstoring in de duinen van Meijendel. Meijendel Mededelingen 17: 26-31.
2 Klinkhamer, P.G.L., Jong, T.J. de, Meijden, E. van der (1985). Over 'eenjarige' en 'tweejarige' planten. Gorteria 12: 143-150.
3 Jong, T.J. de, Klinkhamer, P.G.L. (1985). Bloei-uitstel bij monocarpe planten: een theoretische benadering. Vakblad voor Biologen 5: 89-90.
4 Ek, L. van, de Jong, T.J. de, Klinkhamer, P.G.L. (1987).Distel & Co. Grasduinen 8: 48-53.
5 Klinkhamer, P.G.L., Jong, T.J. de (1990). Tweejarige planten: nomaden van het duin. Meijendel Mededelingen 19: 7-14
6 Klinkhamer, P.G.L., Jong, T.J. de (1988). Beesten en distels. Bulletin voor het Onderwijs in de Biologie 19(114): 122-126.
7 Klinkhamer, P.G.L., Jong, T.J. de (1991). Over Slange­kruid en Hommels. Mijendel Mededelingen 21: 15-22.
8 Jong, T.J. de, Klinkhamer, P.G.L. & Heiden, H. de (19­93) Mycorrhiza, vocht en de verspreiding van Driedistel in Meijen­del. Meijendel Mededelingen 26, 21-26
9 de Heiden, H., Klinkhamer P.G.L. & de Jong T.J. (1995) Onderzoek naar de populatiedynamiek van Carlina vul­garis­ in de duinen van Meijendel. Meijendel Mededel­ingen 27
10. de Jong T.J. & Klinkhamer, P.G.L. (1999). Bloeien met beleid. In: Evolutie betrapt (ed. W. van Strien) KNNV Uitgeverij
11. de Jong T.J. & Klinkhamer, P.G.L. (2002). Planten en bestuivers. In: dwars door de duinen. Van den Berg Katwijk..

Publications in books

· Berendse, F., Jong, T.J. de, Klinkhamer, P.G.L., Troelstra, S.A. (1981). Seasonal differentiation between plant populations in a natural hayfield community. In F. Berendse, Proefschrift, R.U. Utrecht.
· Meijden, E. van der, Jong, T.J. de, Klinkhamer, P.G.L., Kooi, R.E. (1985). Temporal and spatial dynamics in populations of biennial plants. In: J. Haeck, J.W. Woldendorp (eds), 'Structure and functioning of plant populations'. North Holland Publishing Company, Amsterdam.
· Jong, T.J. de, Klinkhamer, P.G.L. (1985). Population growth in a temporally and spatially variable environment. In: J. Haeck, J.W. Woldendorp (eds.). 'Structure and functioning of plant populations'. North Holland Publishing Company, Amsterdam.
· Jong, T.J. de, Klinkhamer, P.G.L. (1986). Population ecology of the biennials Cirsium vulgare and Cynoglossum officinale: an experimental and theoretical approach. Proefschrift, R.U. Leiden.
· Jong, T.J. de, Klinkhamer, P.G.L. (1989). Cynoglossum. In: A.H. Halevy (ed), 'Handbook of flowering plants 6'. CRC Press, Boca Raton.
· Klinkhamer, P.G.L., Jong, T.J. de (1989). Cirsium vulgare. In: A.H. Halevy (ed), 'Handbook of flowering plants 6'. CRC Press, Boca Raton.
· Olejniczak P, Kozlowski J, de Jong TJ & PGL Klinkhamer (1993). Optimal allocation of resources in biennial plants: a numerical model. Fourth congress of the European Society for Evolutionary Biology, Montpellier, France
· Vrieling, K. Cuguen, J., van Dijk, H. van, Samitou-Laprade, P., Jong, T.J. de & Klinkhamer, P.G.L. (1994) Size dependent male reproduction in Cynoglossum officinale and Beta maritima. Proc Ann Meetings Biol & Pop Gen Group.
· Klinkhamer, P.G.L. & de Jong, T.J. (1966) Sex allocation in hermaphrodite plants. Plant Resource allocation (Ed. F.A. Bazzaz & J. Grace) 211-226
· Jong T.J. de & Klinkhamer, P.G.L. (2002) Sex ratios in dioecious plants. Sex ratio concepts and methods (Ed. I. Hardy) Cambridge University Press.
· Klinkhamer, P.G.L. & de Jong, T.J. (2002) Sex allocation in hermaphrodite plants. Sex ratio concepts and methods (Ed. I. Hardy) Cambridge University Press