Get Disturbance in Grasslands: Causes, effects and processes PDF

By J. van Andel, Jan P. Bakker, R.W. Snaydon

ISBN-10: 9400940556

ISBN-13: 9789400940550

ISBN-10: 9401083002

ISBN-13: 9789401083003

This quantity is the results of a Symposium, held in October, 1985, to rejoice the Silver Jubilee of the De­ partment of Plant Ecology of the collage of Groningen. the dept of Plant Ecology was once based through Professor Dingeman Bakker and has, due to the fact that its incep­ tion, been concerned with reports of grasslands, and particularly with the consequences of human interference on grassland groups. it's been in particular interested by a nearly particular firm to transform components of grassland from in depth agricultural construction to nature reserves. With over-production of so much foodstuff commodities within the EEC, and lengthening curiosity in numerous different types of 'set apart' schemes, this initiative now appears remarkably prescient. The Netherlands have an extended historical past of human manipulation of our surroundings. certainly, the Dutch en­ vironment is maybe extra man-made than that of the other nation. In view of this, and the Laborato­ ry's curiosity in controlled grasslands, it's not striking that 'Disturbance in Grasslands' used to be chosen because the subject for the Laboratory's Jubilee Symposium. even supposing either the Symposium and the ensuing vo­ lume, have a powerful Dutch part, the organisers invited a few participants from Europe and in other places to supply key chapters. the result's a quantity which covers many points of disturbance in numerous grasslands. Disturbance is taken into account at either the neighborhood and the inhabitants point, and the foundations and tactics underlying these responses are explored.

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22: 395-408. B. (1974). Intra-population differentiation in annual plants 1. Veronica perigrina raised under non-competitive conditions. Evolution 28: 232-243. G. (1984). Variation strategies of plants in heterogeneous environments. BioI. J. Linn. Soc. 21: 357-385. D. L. (1984), Ecological determinants of genetic structure in plant populations. Ann. Rev. Syst. Ecol. 15: 65-95. N. R. (1972). The cattle dung patch. 2. The effect of a dung patch on the chemical status of the soil. J. Brit. Grassld.

In most of the examples quoted, significant differences have been found between population means, when compared with the genetic variation existing within populations. However considerable genetic variation within populations has also been found. g. e. polymorphism, within populations of grass species. These differences in genetic variation may, in part, be due to the fact that fertilizer applications change the sensitivity to climatic variation, since Snaydon (1973) found that the year-to-year variation in herbage yield differed between fertilizer treatments, and the amount of genetic variation within populations was correlated with yield variation.

BioI. 49: 181-200. T. (1979). Environmental heterogeneity: a problem of contradictory selection pressures, gene flow, and local polymorphism. Am. Nat. 113; 247-260. W. (1970). Rapid population diferentiation in a mosaic environment. I The response of Anthoxanthum odoratum populations to soils. Evolution 24: 257-269. W. (1973). Ecological factors, genetic variation and speciation in plants. H. Taxonomy and Ecology, pp 1-29. Academic Press, London. Snaydon, R. W. (1978). Genetic changes in pasture populations.

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Disturbance in Grasslands: Causes, effects and processes by J. van Andel, Jan P. Bakker, R.W. Snaydon

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