河口
海湾
沉积物
沼泽
植被(病理学)
环境科学
湿地
环境变化
δ13C
地质学
盐沼
海洋学
生态学
稳定同位素比值
气候变化
地貌学
医学
物理
病理
量子力学
生物
作者
Frances Malamud-Roam,B. Lynn Ingram
摘要
Wetland sediments surrounding the San Francisco Bay Estuary contain a rich history of environmental change which can aid predictions of potential responses to future environmental change. Here we present results of a study of the stable carbon isotopic composition of modern surface sediments as they relate to the existing plant cover. The results indicate a strong correlation between the modern plant cover and the δ 13 C value of underlying surface sediments (RMS = 1.331). Reasons for residual differences between predicted and observed isotopic values of the surface soils include intraspecific changes in δ 13 C values of C3 plants, contributions to the carbon pool by algae, and effects of diagenesis on δ 13 C value of plant matter. The goal of this research is to provide a basis for interpreting isotopic data obtained from sediment cores in terms of changes in vegetation resulting from changes in environmental conditions.
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