AI Article Synopsis
- * Results indicated that water in forest areas showed smaller average values and variation in δO isotopes compared to terrace areas, suggesting different influences of these landscapes.
- * The elevation impact on hydrogen and oxygen isotopes was notable, but it was influenced more by the landscape gradient rather than precipitation patterns, leading to enhanced δO differences between forest and terrace patches.
Article Abstract
With the Quanfuzhuang River basin located at Hani Rice Terrace core region as study area, we analyzed the isotopic composition and the effects of 12 surface water sampling sites for the forest landscape type and terrace landscape type from May 2015 to April 2016. The results showed that: 1) For the variation of isotope composition, both the average value and the variation range of δO in surface water under forest patches were smaller than that under terrace patches. 2) The overall elevation effect of the hydrogen and oxygen stable isotopes in surface water was obvious, except that in August and March, which could be expressed as the linear regression equation δO=-0.012+13.84 (=-0.83, =12). 3) The altitude gradient of δO in surface water was -1.2‰·(100 m), which was not the true altitude gradient affected by precipitation but by landscape gradient of δO in surface water between forest patches and terrace patches. 4) Under the "Forest-Terrace" landscape pattern, the δO differences in surface water between forest patches and terrace patches enhanced the elevation effect. Therefore, when landscape heterogeneity was strong, isotopic effect was strengthened, even with opposite isotope effect.
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| http://dx.doi.org/10.13287/j.1001-9332.202204.010 | DOI Listing |
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