Get Alpine Treelines: Functional Ecology of the Global High PDF

By Christian Körner

ISBN-10: 3034803958

ISBN-13: 9783034803953

Alpine treelines mark the low-temperature restrict of tree progress and ensue in mountains world-wide. providing a spouse to his booklet Alpine Plant Life, Christian Körner presents an international synthesis of the treeline phenomenon from sub-arctic to equatorial latitudes and a sensible rationalization in accordance with the biology of bushes. the great textual content techniques the topic in a multi-disciplinary manner via exploring wooded area styles on the fringe of tree existence, tree morphology, anatomy, climatology and, in accordance with this, modelling treeline place, describing replica and inhabitants methods, improvement, phenology, evolutionary features, in addition to summarizing proof at the body structure of carbon, water and nutrient kinfolk, and rigidity body structure. It closes with an account on treelines some time past (palaeo-ecology) and a piece on worldwide switch results on treelines, now and sooner or later. With greater than a hundred illustrations, a lot of them in color, the booklet exhibits alpine treelines from worldwide and gives a wealth of clinical info within the type of diagrams and tables.

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Extra resources for Alpine Treelines: Functional Ecology of the Global High Elevation Tree Limits

Example text

2). Hence, in a rapidly warming climate, temperatures measured at the treeline will be higher than those the treeline might be tracking in the long run, with discrepancies greatest in most rapidly warming regions. 1 Subarctic and boreal zone (45–68 N) The four locations for which comparable data have been collected are well spaced across the holoarctic belt and encompass quite different life conditions (Fig. 3). The Altai mountains (Pinus) and the Baertooth Mountains (Pinus) stand for the southern part of the boreal belt (treelines at 1890 m and 3075 m, respectively), the Scandinavian location (Betula) is placed near the northern limit of tree growth (700 m) and is under oceanic influence, the site in Alaska (Picea) is on shallow permafrost (930 m).

Such a mean commonly results from low positive temperatures during the day (<10  C), and light frost at night > À5  C), and may include a few hours of temperatures above 5  C, often seen critical for plant activity (K€ orner 2008; Chap. 7). Because day to day weather fluctuation commonly causes the season to ‘switch on and off ’ during the early and late days of the growing season, a weekly mean of 0  C is a more robust threshold. g. means, thermal sums such as degree hours or day degrees).

Sheer forces of wind, loss of substrate through erosion, too small areas to establish populations and little opportunities for upslope seed transfer commonly eliminate tree taxa from summits, irrespective of their elevation. It needs several hundred metres of mountain terrain above the climatic treeline elevation for normal treeline establishment. For instance, there is an often debated ‘treeline’ in the Black Forest (Germany, 47 N) and the nearby Vosges Mountains (France) near Basel (Switzerland) at 1300–1500 m (Bogenrieder et al.

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Alpine Treelines: Functional Ecology of the Global High Elevation Tree Limits by Christian Körner

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