Abstract
To assess the effect of the invasion of vascular plants on the heat and water balance in aSphagnum bog, evapotranspiration was compared throughout a growing season in theSphagnum bog and in the adjoining transition peatland where vascular plants completely cover the ground surface in the Sarobetsu mire, northern Japan. Cumulative evapotranspiration over 152 days was 372 mm in the transition peatland and 285 mm in the bog, with the differences between the sites becoming clear from mid-August. Therefore, we consider the invasion of the vascular plants into theSphagnum bog to accelerate water consumption. However, levels of evapotranspiration in mid-summer did not differ greatly between the sites. In mid-summer, the ratio of latent heat flux to net radiation decreased in the transition peatland on days when humidity deficit was large, although, in the bog, the ratio showed a large value in those days. We attribute the decrease in the ratio to stomatal closure with the increase in humidity deficit. We also conclude that the invading vascular plants developed a negative feedback mechanism of stomatal response to the humidity deficit of the ambient air in mid-summer.
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Literature Cited
Fujita, H. 1997. The process of extinction of Sarobetsu Mire, northern Hokkaido. p. 59–71.In T. Tsujii, H. Tachibana, H. Shinsho, S. Uemura, K. Yabe, and H. Fujita (eds.) Report of the Pro Natura Foundation (Japan), Fiscal years of 1994/1995. Vegetation and recent changes of mire areas in Hokkaido—for the conservation of mires in Hokkaido. The Pro Natura Foundation, Tokyo, Japan. (in Japanese with English summary)
Hokkaido Development Agency. 1963. Report of the undeveloped peatlands of Hokkaido. Hokkaido Development Agency, Sapporo, Japan. (in Japanese)
Hayward, P. M. and R. S. Clymo. 1982. Proflies of water content and pore size inSphagnum and peat, and their relation to peat bog ecology. Proceedings of the Royal Society, London B 215: 299–325.
Ingram, H. A. P. 1983. Hydrology. p. 67–158.In A. J. P. Gore (ed.) Ecosystems of the World 4A. Mires: Swamp, Bog, Fen and Moor. General Studies. Elsevier Scientific, Amsterdam, The Netherlands.
Ito, K. 1983. Man’s impact on the wetlands in Japan. p. 327–334.In W. Holzner, M. J. A. Werger, and I. Ikushima (eds.) Man’s impact on vegetation. Dr. W. Junk Publishers, The Hague, The Netherlands.
Ito, K. and L. Wolejko. 1990. A conservational review of Sarobetsu Mire, northern Hokkaido. Environmental Science, Hokkaido University 13:75–92.
Kelliher, F. M., R. Leuning, and E.-D. Schulze. 1993. Evaporation and canopy characteristics of coniferous forests and grasslands. Oecologia 95:153–163.
Kim, J. and S. B. Verma. 1996. Surface exchange of water vapour between an open sphagnum fen and the atmosphere. Boundary-Layer Meteorology 79:243–264.
Körner, Ch. 1994. Leaf diffusive conductances in the major vegetation types of the globe. p. 463–490.In E.-D. Schulze and M. M. Caldwell (eds.) Ecological Studies 100. Ecophysiology of Photosynthesis. Springer-Verlag, Heidelberg, Germany.
Lafleur, P. M. 1988. Leaf conductance of four species growing in a subarctic marsh. Canadian Journal of Botany 66:1367–1375.
Lafleur, P. M. 1990. Evaporation from wetlands.In N. T. Roulet (ed.) Focus: aspects of the physical geography of wetlands. The Canadian Geographer 34:79–88.
Lafleur, P. M. and N. T. Roulet. 1992. A comparison of evaporation rates from two fens of the Hudson bay lowland. Aquatic Botany 44:59–69.
Lafleur, P. M. and W. R. Rouse. 1988. The influence of surface cover and climate on energy partitioning and evaporation in a subarctic wetland. Boundary-Layer Meteorology 44:327–347.
Nichols, D. S. and J. M. Brown. 1980. Evaporation from a sphagnum moss surface. Journal of Hydrology 48:289–302.
Sapporo District Meteorological Observatory. 1993. AMeDAS data from Hokkaido I. Japan Weather Association Hokkaido Head Office, Sapporo. Japan. (in Japanese)
Sapporo District Meteorological Observatory. 1995, Monthly report of meteorological stations in Hokkaido. Meteorological observations for June. 1995. Sapporo District Meteorological Observatory, Sapporo, Japan. (in Japanese)
Takagi, K., T. Tsuboya, and H. Takahashi. 1998. Diurnal hystereses of stomatal and bulk surface conductances in relation to vapor pressure deficit in a cool-temperature wetland. Agricultural and Forest Meteorology 91:177–191.
Tsuboya, T., K. Takagi, Y. Kurashige, and N. Tase. 1997. Diurnal fluctuations in peat-water content in Sarobetsu Mire. Hokkaido, Japan. Journal of Japanese Association of Hydrological Sciences 27:129–141. (in Japanese with English abstract)
Umeda, Y., M. Shimizu, and M. Demura. 1986. Forming of Sarobetsu peatland—Surface forms on peatland (II). Memoirs of the Faculty of Agriculture Hokkaido University 15:28–35. (in Japanese with English summary)
van Wijk, W. R. and D. A. de Vries. 1963. Periodic temperature variations in homogeneous soil. p. 102–143.In W. R. van Wijk (ed.) Physics of Plant Environment. North-Holland Publishing Co., Amsterdam, The Netherlands.
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Takagi, K., Tsuboya, T., Takahashi, H. et al. Effect of the invasion of vascular plants on heat and water balance in the Sarobetsu mire, northern Japan. Wetlands 19, 246–254 (1999). https://doi.org/10.1007/BF03161754
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DOI: https://doi.org/10.1007/BF03161754