Download Alpine Plant Life: Functional Plant Ecology of High Mountain by Christian Körner PDF

Climatology

By Christian Körner

ISBN-10: 3540654380

ISBN-13: 9783540654384

Generations of plant scientists were excited about alpine flowers - with the publicity of organisms to dramatic climatic gradients over a really brief distance. This entire textual content treats a variety of subject matters: alpine weather and soils, plant distribution and the treeline phenomenon, physiological ecology of water-, dietary- and carbon relatives of alpine crops, plant tension and plant improvement, biomass creation, and elements of human affects on alpine crops. Geographically the booklet covers all components of the realm together with the tropics.

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Sample text

14. Diurnal variations of temperature in mature outer parts and juvenile inner parts of the giant tropical rosettes of Lobelia keniensis (Mt. Kenya 4150 m) which show nocturnal "bud" closure. Note, the temperatures in the core of the rosette are for liquid "cisternas" developing from exudate in the most actively growing part. (Beck et al. 1982) Ltidi (1938) for instance, compared -2 and -10 cm soil temperatures measured synchronously at three altitudes above the treeline in the central Alps on a clear midsummer day.

Lmolm-2 s- 1• The greater number of hours ith weak light in the north partly outweighs greater intensities in the south. 8 m-2 5- 1) Fig. 10. The frequency distribution of quantum flux density (400-700 nm) at biologically comparable altitudes in the Ecuadorian Andes (0° latitude) and the central Alps (47°N): pooled data for 5 months of measurements on Guagua Pichincha (4600 m) and Paramo de la Virgen (4000 m) and growing season data (mid June to end of August) for the Central Alps, Mt. Glungezer 2600 m.

500Wm-2 or 1000/-lmolm-2 s- l , summing up to 1500Wm-2 or 3000/-lmolm-2 s-1, values actually measured by the author in midsummer at 2600 m altitude near Innsbruck. Turner (l958a) measured 18% more than maximum clear sky radiation under such conditions near the treeline. Reflections from surrounding snow may further enhance the radiative load in certain areas. Alpine plants have to cope with such short term extremes, unlikely to occur at lower altitudes. Similar to the situation with solar radiation sums, there is also no general pattern for changes in precipitation sums with altitude.

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