Die Bodentemperaturverhältnisse an einer zentralalpinen Hanglage beiderseits der Waldgrenze

Aulitzky, Herbert

doi:10.1007/bf02244639

Cited by 6 publications

(12 citation statements)

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“…24) found, between 10:00 a.m. and 6:00 p.m., maximum differences in average surface temperatures of 2 °C between microsites receiving different amounts of direct sunlight in small gaps in subalpine P. abies forests. In contrast, direct radiation can strongly influence temperatures at the soil surface in high-elevation environments [3], and instantaneous values at 1 cm depth [27]. These results suggest that, given an intermediate direct energy input, the time of day of exposure to direct light is unlikely to influence the growth of P. abies seedlings by a soil temperature-root growth path.…”

Section: Performance Of Light Treatments and Effects On Soil Temperaturesupporting

confidence: 37%

“…Soil temperature within this layer limits root growth [4,16], which starts at a temperature of 8 and 12°C [42] and increases up to about 20 °C [41,42]. Site factors affecting near-surface soil temperatures are air temperature, direct sunlight, vegetation cover [3,16,28], snow cover [3], and soil properties such as water content [38].…”

Section: Introductionsupporting

confidence: 38%

“…Soil temperature has been shown to be a limiting factor for seedling growth in subalpine forests [3,4,16,41], especially under moist conditions [9,11,27]. The minor growth of seedlings in the 'control' treatment than in the treatments receiving direct sunlight (Fig.…”

Section: Seedling Growthmentioning

confidence: 39%

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Morning, noon, or afternoon: does timing of direct radiation influence the growth of Picea abies seedlings in mountain forests?

2005

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-We studied the influence of the timing of direct sunlight on the growth of Picea abies seedlings in a field experiment on a northfacing slope in the subalpine zone of the Swiss Alps. Vertical walls were established to expose three-year-old P. abies seedlings to direct sunlight at different times of day (morning, noon, afternoon), and to diffuse light only, during two growing seasons. The light treatments were chosen in order to simulate microsites in forest gaps with different orientations. While the light treatments resulted in different daily soil temperature curves, they affected neither average growing season soil temperature nor the frequency of soil temperatures above 10 °C, which are assumed to be particularly beneficial for seedling growth. Final seedling biomass was unaffected by the timing of direct sunlight, but lower for seedlings receiving diffuse light only. These findings suggest that the orientation of slit-shaped gaps in subalpine forests to promote P. abies seedling growth is unimportant.gap orientation / seedling growth / time of day of direct radiation / Picea abies / soil temperature Résumé -Le matin, à midi, ou l'après-midi : le moment du rayonnement direct influence-t-il la croissance des semis de Picea abies en forêt de montagne ? Nous avons étudié si le moment du rayonnement direct pendant la journée influençait la croissance des semis de Picea abies. Cette recherche a été réalisée dans un site expérimental en pente exposé au nord dans la zone subalpine des Alpes suisses. Des parois verticales ont été érigées afin d'exposer des semis de P. abies de trois ans au rayonnement direct à différents moments de la journée (le matin, à midi, l'après-midi), et au rayonnement diffus seulement, et ceci pendant deux périodes de végétation. Les microstations formées par les traitements d'exposition à la lumière devaient ressembler à des microstations en ouvertures diversement orientées en forêt. Bien que ces traitements aient modifié l'évolution de la température du sol au cours de la journée, ils n'ont influencé ni la température moyenne du sol pendant la période de végétation ni la fréquence des températures du sol supérieures à 10°C, un niveau supposé être particulièrement bénéfique à la croissance des semis. Le rayonnement direct n'a pas modifié la biomasse finale des semis, mais la biomasse des semis qui ne recevaient que du rayonnement diffus était plus petite. Il résulte de cette étude que l'orientation des ouvertures en fente dans des forêts subalpines n'est pas susceptible d'influencer la croissance des semis de P. abies. orientation des trouées / croissance des semis / moment de la journée avec rayonnement direct / Picea abies / température du sol

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Section: Performance Of Light Treatments and Effects On Soil Temperaturesupporting

confidence: 37%

Section: Introductionsupporting

confidence: 38%

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Morning, noon, or afternoon: does timing of direct radiation influence the growth of Picea abies seedlings in mountain forests?

2005

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“…Auch im Zuge von glaziologischen Studien wurden Überlegungen zum Kleinklima angestellt (Hoinkes & Rudolph 1961). Die Bedeutung der Bodentemperatur für das Pflanzenwachstum erkannte bereits Aulitzky (1961). Anhand von Bodentemperaturmessungen über und unter der Waldgrenze zeigte er "kleinstandörtliche" Unterschiede und die Abhängigkeit von der Schneebedeckung auf (Aulitzky 1961(Aulitzky , 1962a(Aulitzky , 1962b.…”

Section: Gewässerbeschreibung Und Zonierungunclassified

“…Die Bedeutung der Bodentemperatur für das Pflanzenwachstum erkannte bereits Aulitzky (1961). Anhand von Bodentemperaturmessungen über und unter der Waldgrenze zeigte er "kleinstandörtliche" Unterschiede und die Abhängigkeit von der Schneebedeckung auf (Aulitzky 1961(Aulitzky , 1962a(Aulitzky , 1962b. Im Rahmen des Man and Biosphere-Projekts (MAB; Moser 1975, Patzelt 1987 einer Wiese bei Obergurgl durchgeführt (Rott 1979(Rott , 1987Staudinger 1987 …”

Section: Gewässerbeschreibung Und Zonierungunclassified

Klima, Wetter, Gletscher im Wandel

Koch¹,

Erschbamer²

2013

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Die Lufttemperaturverhältnisse einer zentralalpinen Hanglage

Aulitzky¹

1968

Arch. Met. Geoph. Biokl. B.

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Zusammenfassung. Im inneren Otztal, einem zentralalpinen sfidlichen Seitem tal des Inn (Tirol, Osterreich), wird das Lufttemperaturklima zweier gegeniiberliegender H/inge (WNW-und ESE-Hang) zwischen 1820 mund 2440m untersucht. Nach einer Beschreibung der Met~umst/inde und der Lage des Stationsgebietes in den kontinental getSnten Innenalpen wird das reliefbedingte Hangklima beschrieben und das Ausmag der ,,warmen Hangzone" im Gangniveau, in der Gangphase, in den Amplituden-, Extrem-und Mittelwerten sowie in der H~iufigkeit nachgewiesen. Darfiber hinaus wurde auch der Einflul~ des Mikroreliefs und der Bestockung im Bereich der oberen Waldgrenze ermittelt. Ferner wird auf die biologische Bedeutung der Temperaturmeliorierung in der ,,warmen Hangzone" fiir die Holzartenverteilung, ffir Assimilation und Atmung (Respiration) der Holzarten und ffir die Dauer der Vegetationsperiode hingewiesen. Summary. In the inner valley of Otz river, a southerly transversal valley of tile valley of the Inn river in the Central Alps (Tyrol, Austria), the air temperature conditions of two slopes, one facing the other, one directed against WNW the other against ESE, has been investigated climatologically in a region between I820 and 2440 m a. s. 1. After a description of the instruments used, the method of the measurements, and the site of the stations in the climatologically continental Inner Alps, the author discusses the slope-climate, caused by the relief of the site, and identifies the extent of the "thermal belt" in level and phase of the variations, the amplitudes, extremes, mean values, and frequencies. Further, he shows the influences of the micro-relief and of the cover density of wood in the region of the upper timber-line. Finally, the biological importance of the temperature-melioration in the warm slope-region for the distribution of species of trees, for assimilation and respiration of the wood and for the duration of the growing season is stressed.

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Die Bodentemperaturverhältnisse an einer zentralalpinen Hanglage beiderseits der Waldgrenze

Cited by 6 publications

References 4 publications

Morning, noon, or afternoon: does timing of direct radiation influence the growth of Picea abies seedlings in mountain forests?

Morning, noon, or afternoon: does timing of direct radiation influence the growth of Picea abies seedlings in mountain forests?

Klima, Wetter, Gletscher im Wandel

Die Lufttemperaturverhältnisse einer zentralalpinen Hanglage

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