Using water stable isotopes to trace water sources of three typical Japanese tree species under heavy rainfall conditions
Lopez C., M. Larry
Brandt, Alexander C.
MetadataShow full item record
Stable isotopes of xylem water (18O and D) have been successfully used to determine sources of soil water for plant transpiration, but mainly in drought-prone environments. The water uptake strategies of three representative tree species in Japan, namely cedar (Cryptomeria japonica), larch (Larix kaempferi) and beech (Fagus crenata), were investigated using δ18O and δD of water (precipitation, soil and xylem), together with wood α-cellulose δ13C and δ18O, along one growing season. The study was carried out in the research forest of Yamagata University (Shonai region), a high precipitation area in Japan, which exceeds 3000 mm per year. Precipitation water δ18O and δD increased along the summer growing season, but oxygen and hydrogen isotopic composition of soil water remained essentially unchanged. In general, xylem water isotopes of cedar and larch followed the local meteoric water line, but beech xylem water was decoupled from soil and precipitation values in July and August. For this tree species, the xylem water isotopic records were more depleted than cedar and larch xylem water isotopic values and the precipitation water isotopic records, indicating that beech used more water from soil layers during July-August than the other two species, which mainly used newly-fallen precipitation. Wood δ18O showed an opposite seasonal trend to the one found for xylem water, likely because of leaf water isotope enrichment, which was in turn controlled by seasonal transpiration rate. The higher δ13C values of cedar during summer suggested that this species had enhanced water-use efficiency during the growing season compared with the deciduous species larch and beech. Our results highlight different water use strategies among forest tree species even in areas where the annual water balance is far from limiting plant performance.
Is part ofOpen Journal of Forestry, 2020, vol. 10, num. 1, p. 7-21
European research projects
Except where otherwise noted, this item's license is described as cc-by (c) Zhang, Qiqin et al., 2020
Showing items related by title, author, creator and subject.
Techno-economic analysis of a heat pump cycle including a three-media refrigerant/phase change material/water heat exchanger in the hot superheated section for effi cient domestic hot water generation Emhofer, Johann; Marx, Klemens; Barz, Tilman; Hochwallner, Felix; Cabeza, Luisa F.; Zsembinszki, Gabriel; Strehlow, Andreas; Nitsch, Birgo; Wiesflecker, Michael; Pink, Werner (MDPI, 2020)Integration of a three-media refrigerant/phase change material (PCM)/water heat exchanger (RPW-HEX) in the hot superheated section of a heat pump (HP) system is a promising approach to save energy for domestic hot water ...
Soil water content, runoff and soil loss prediction in a small ungauged agricultural basin in the Mediterranean region using the Soil and Water Assessment Tool Ramos Martín, Ma. C. (Ma. Concepción); Martínez Casasnovas, José Antonio (Cambridge University Press, 2015)The aim of the present work was to evaluate the possibilities of using sub-basin data for calibration of the Soil and Water Assessment Tool (SWAT) model in a small (46 ha) ungauged basin (i.e. where the water flow is not ...
Water in dry Catalonia. Historical water usage and perspectives for present-day evaluation: case study of the municipality of Torrebesses (Segrià, Western Catalonia) in the area of Vall Major Aldomà i Buixadé, Ignasi (Departament de Cultura de la Generalitat de Catalunya Direcció General de Cultura Popular, Associacionisme i Acció Culturals, 2015)Sobre la base del patrimoni conservat, els testimonis orals i la documentació històrica, l’article explica com els habitants dels secans de Torrebesses (Segrià) han desenvolupat al llarg del temps estratègies per a ...