Full TGIF Record # 75859
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Web URL(s):http://www.sciencedirect.com/science/article/pii/S0167880900002905
    Last checked: 10/09/2015
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Author(s):Rosset, M.; Montani, M.; Tanner, M.; Fuhrer, J.
Author Affiliation:Swiss Federal Research Station for Agruecology and Agricluture (FAL), Lienefeld, Bern, Switzerland
Title:Effects of abandonment on the energy balance and evapotranspiration of wet subalpine grassland
Source:Agriculture, Ecosystems, and Environment. Vol. 86, No. 3, September 2001, p. 277-286.
# of Pages:10
Publishing Information:Amsterdam: Elsevier Science Publishers
Keywords:TIC Keywords: Energy balance; Evapotranspiration; Grasslands; Land use; Ground cover; Radiation; Biodiversity; Albedo; Canopy; Soil water content; Biomass; Natural areas
Abstract/Contents:"Abandoment of grasslands is an important form of land-use change in subalpine regions. It leads to marked changes in the vegatation cover, which, in turn, may affect to radiative properties of the canopy and exchange processes between the ecosystem and the atmosphere. The aim of this study was to quantify the differences in net radiation (Rn), albedo (^D*) and energy balance components between a managed and an abandoned wet grassland field in relationship to biomass and necromass production. The study in the Rotenbach watershed on the northern slope of the Swiss Alps (1400 m above sea level) was based on continuous measurements of the energy and radiation balances during two consecutive seasons. The managed dominating species (Ranunculus aconitifolius) was much more abundant. Annual production of aboveground plant biomass was similar in both fields, but litter accumulation and the amount of standing necromass was larger in the abandoned field. Early in the season, the litter layer at the abandoned site had only a minor influence on Rn, but the larger amount of standing necromass in the course of the season decreased x and increased Rn. This effect was most pronounced durning the mid-season and compensated for the higher ratio of sensible to latent heat fluxes, i.e., the Bowen riot of the abandoned field. The resulting difference in total water vapour flux (evapotranspiration, ET) between the fields was small. Largest reduction in ET occurred early and late in the season, and this was partly due to decreased soil evaporation. Although the effect of abandonment on the cumulative ET during the two measuring periods was small, it was sufficient to increase the soil water content in the abandoned field, particularly during the later part of the season. It is concluded that abandonment causes a change in canopy structure which leads to reduced ET and temporarily increased soil water content."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Rosset, M., M. Montani, M. Tanner, and J. Fuhrer. 2001. Effects of abandonment on the energy balance and evapotranspiration of wet subalpine grassland. Agric. Ecosyst. Environ. 86(3):p. 277-286.
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    Last checked: 10/09/2015
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