Ecological genetics of Bromus tectorum

Oecologia - Tập 88 - Trang 84-90 - 1991
Kevin J. Rice1, Richard N. Mack2
1Department of Agronomy and Range Science, University of California, Davis, USA
2Department of Botany, Washington State University, Pullman, USA

Tóm tắt

For Bromus tectorum, an alien annual grass now widespread in western North America, we assessed the sensitivity of the phenotypic expression of populational differences in phenology and demography to variation in plant density. Plants were grown in an unheated glasshouse from seeds collected from six habitat types located along a moisture-temperature gradient. Survival to flowering was high with a mean overall survival of 91%. Survival was highest among plants from the coolest, most mesic site. Time to first flowering decreased at the higher sowing density and was dependent on seed source. Plant dry weight and average seed production was lowest within high density plots; the magnitude of this reduction was significantly dependent on seed source. Individual seed weight was also dependent on the interaction of seed source and sowing density. Seed weight did not vary as much as seed number or plant weight in response to density. Differences among sources in hierarchies of plant size and seed production were detected at low sowing densities. The degree of inequality in the distributions of plant size and seed number increased at high density.

Tài liệu tham khảo

Barrett SCH, Richardson BJ (1986) Genetic attributes of invading species. In: Groves RH, Burdon JJ (eds) Ecology of biological invasions. Cambridge University Press, Great Britain, pp 21–33 Barrett SCH, Wilson BL (1981) Colonizing ability in the Echinochloa crus-galli complex (barnyard grass). I. Variation in life history. Can J Bot 59:1844–1860 Bradshaw AD (1965) Evolutionary significance of phenotypic plasticity in plants Adv Gen 13:115–155 Caswell H (1983) Phenotypic plasticity in life-history traits: Demographic effects and evolutionary consequences. Am Zool 23:35–46 Clausen J, Keck DD, Heisey WM (1948) Experimental studies on the nature of species. III. Environmental responses of climatic races of Achillea. Carnegie Inst Washington Pub 581 Crawley MJ (1986) What makes a community invasible? In: Gray AJ, Crawley MJ, Edwards PJ (eds) Colonization, succession and stability. Blackwell Scientific Publications, Oxford, pp 429–453 Daubenmire R (1970) Steppe vegetation of Washington. Washington Agric Expt Stn Tech Bul 62 Dolan RW, Sharitz RR (1984) Population dynamics of Ludwigia leptocarpa (Onagraceae) and some factors affecting size hierarchies in a natural population. J Ecol 72:1031–1041 Freund RJ, Littell RC, Spector PC (1986) SAS system for linear models. SAS Institute Inc, Cary, North Carolina Gottlieb LD (1977) Genotypic similarity of large and small individuals in a natural population of the annual plant Stephanomeria exigua ssp. coronaria (Compositae). J Ecol 65:127–134 Harper JL (1961) Approaches to the study of plant competition. In: Milthorpe FL (ed) Mechanisms in biological competition. Symp Soc Exptl Biol 15, pp 1–39 Harper JL (1961) A Darwinian approach to plant ecology. J Ecol 55:247–270 Harper JL, White J (1974) The demography of plants. Ann Rev Ecol Syst 5:419–463 Harper JL, Lovell PH, Moore KG (1970) The shapes and sizes of seeds. Ann Rev Ecol Syst 1:327–356 Harper JL, Williams JT, Sagar GR (1965) The behaviour of seeds in soil. Part 1. The heterogeneity of soil surfaces and its role in determining the establishment of plants from seed. J Ecol 53:273–286 Hartgerink AP, Bazzaz FA (1984) Seedling-scale environmental heterogeneity influences individual fitness and population structure. Ecology 65:198–206 Hayward IM, Druce GC (1919) The adventive flora of Tweedside. T. Buncle and Co., Arbroath Heywood JS (1986) The effect of plant size variation on genetic drift in populations of annuals. Am Nat 127:851–861 Hickman JC (1975) Environmental unpredictability and plastic energy allocation strategies in the annual Polygonum cascadense (Polygonaceae). J Ecol 63:689–701 Holm LG, Pluckett DL, Pancho JV, Herberger JP (1977) The world's worst weeds. University of Hawaii, Honolulu Jain SK (1978) Inheritance of phenotypic plasticity in soft chess, Bromus mollis L. (Gramineae). Experientia 34:835–836 Jain SK (1979) Adaptive strategies: polymorphism, plasticity, and homeostasis. In: Solbrig OT, Jain SK, Johnson GB, Raven PH (eds) Topics in plant population biology. Columbia University Press, New York, pp 160–187 Klemmedson JO, Smith JG (1964) Cheatgrass (Bromus tectorum). Bot Rev 30:226–262 Levin DA (1978) Some genetic consequences of being a plant. In: Brussard PF (ed) Ecological genetics: the interface. Springer, New York, pp 189–212 Levins R (1968) Evolution in a changing environment. Princeton University Press, Princeton, New Jersey Lewontin RC (1957) The adaptation of populations to varying environments. Cold Spring Harbor Symp Quant Biol 22: 395–408 Mack RN (1989) Temperate grasslands vulnerable to plant invasion: characteristics and consequences. In: Drake JA, Mooney HA, Di Castri F, Groves RH, Kruger FJ, Rejmanek M, Williamson M (eds) Biological invasiens: a global perspective. Wiley and Sons, New York, pp 155–179 Mack RN, Harper JL (1977) Interference in dune annuals: spatial pattern and neighbourhood effects. J Ecol 65:345–363 Mack RN, Pyke DA (1983) The demography of Bromus tectorum L.: variation in time and space. J Ecol 71:69–93 Mack RN, Pyke DA (1984) The demography of Bromus tectorum: the role of microclimate, predation and disease. J Ecol 72:731–748 Marshall DL, Levin DA, Fowler NL (1985) Plasticity in yield components in response to fruit predation and date of fruit initiation in three species of Sesbania (Leguminosae). J Ecol 73:71–81 Marshall DR, Jain SK (1968) Phenotypic plasticity of Avena fatua and A. barbata. Am Nat 102:457–467 Maun MA (1981) Seed germination and seedling establishment of Calamovilfa longifolia on Lake Huron sand dunes. Can J Bot 59:460–469 McNeilly T (1968) Evolution in closely adjacent plant populations. III. Agrostis tenuis on a small copper mine. Heredity 23:99–108 McNeilly T (1984) Ecotypic differentiation in Poa annua: within population variation in response to competition and cutting. New Phytol 96:307–316 McNeilly T, Bradshaw AD (1968) Evolutionary processes in populations of copper tolerant Agrostis tenuis. Evolution 22:108–118 Moran GF, Marshall DR, Muller WJ (1981) Phenotypic variation and plasticity in the colonizing species Xanthium strumarium L. (Noogoora Burr). Aust J Biol Sci 34:639–648 Palmblad IG (1968) Competition in experimental studies on populations of weeds with emphasis on the regulation of population size. Ecology 49:26–34 Rice KJ (1990) Reproductive hierarchies in Erodium: effects of variation in plant density and rainfall distribution. Ecology 71:1316–1322 Rice KJ, Mack RN (1991a) Ecological genetics of Bromus tectorum I. A hierarchical analysis of phenotypic variation Oecologia 88:77–83 Rice KJ, Mack RN (1991b) Ecological genetics of Bromus tectorum III. The demography of reciprocally sown populations. Oecologia 88:91–101 Ridley HN (1930) The dispersal of plants throughout the world. L. Reeve, Kent, Great Britain Salisbury EJ (1940) Ecological aspects of plant taxonomy. In: Huxley J (ed) The new systematics. Clarendon Press, Oxford, pp 329–340 Salisbury EJ (1961) Weeds and aliens. Collins, London Scheiner SM and Goodnight CJ (1984) The comparison of phenotypic plasticity and genetic variation in populations of the grass Danthonia spicata. Evolution 38:845–855 Schlichting CD (1986) The evolution of phenotypic plasticity in plants. Ann Rev Ecol Syst 17:667–693 Schlichting CD, Levin DA (1984) Phenotypic plasticity of annual Phlox: tests of some hypotheses. Am J Bot 71:252–260 Schlichting CD, Levin DA (1986) Phenotypic plasticity: an evolving plant character. Biol J Linn Soc 29:37–47 Shaw RG (1986) Response to density in a wild population of the perennial herb Salvia lyrata: variation among families. Evolution 40:492–505 Solbrig OT (1981) Studies on the population biology of the genus Viola. II. The effect of plant size on fitness in Viola sororia. Evolution 35:1080–1093 Stearns SC, Koella JC (1986) The evolution of phenotypic plasticity in lifehistory traits: predictions of reaction norms for age and size at maturity. Evolution 40:893–913 Stewart G, Hull AC (1949) Cheatgrass (Bromus tectorum L.) — an ecological intruder in southern Idaho. Ecology: 30 58–74 Sultan SE (1987) Evolutionary implications of phenotypic plasticity in plants. Evol Biol 21:127–178 Thoday JM (1975) Non-Darwinian “evolution” and biological progress. Nature 255:675–677 Turkington R (1983) Plasticity in growth and pattern of dry mass distribution of two genotypes of Trifolium repens grown in different environments of neighbours. Can J Bot 61:2186–2194 Via S, Lande R (1985) Genotype-environment interactions and the evolution of phenotypic plasticity. Evolution 39:505–522 Watkinson AR (1982) Factors affecting the density response of Vulpia fasciculata. J Ecol 70:149–161 Weiner J, Solbrig OT (1984) The meaning and measurement of size hierarchies in plant populations. Oecologia 61:334–336 Yoda K, Kira T, Ogawa H, Hozumi K (1963) Self thinning in overcroweded pure stands under cultivated and natural conditions. J Biol Osaka City Univ 14:107–129 Zar JH (1974) Biostatistical analysis. Prentice-Hall Inc, Englewood Cliffs, New Jersey