Data to the microclimate of some characteristic grassland associations of the Transdanubian mountains

Bauer, N. and Kenyeres, Z. (2006) Data to the microclimate of some characteristic grassland associations of the Transdanubian mountains. Acta Botanica Hungarica, 48 (1-2). pp. 9-27. ISSN 0236-6495

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Abstract

In order to examine the complex role of the vegetation structure determining microclimate, the authors carried out temperature and relative humidity measurements in beany fens, drying fens, semidry grasslands, hayfields, steppe grasslands, rocky grasslands and open sandy grasslands of the Transdanubian mountains. In the course of this process, measurement and data recording took place annually with four repetitions (June, July, August, September) per sampling area in identical weather conditions, resulting in altogether 162 sampling occasions in 84 sampling areas on the ground surface and at a height of 10, 20, 30 and 120 cm in the grassland. In the present paper measurement data concerning the humidity of grasslands researched to a lesser extent in previous works are assessed. The comparative study ascertains that based on the relative humidity curves depicting microclimate, the samples of the examined types of grassland should be handled as separate groups in each sampling period. A further result to be seen is that in the case of several grasslands (semidry grasslands, drying fens) aspect change can also be detected in the change of microclimate (decrease of the relative humidity). The shift in relative humidity curves towards drying can be most conspicuously seen in the case of semidry grasslands.

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