Details

Autor(en) / Beteiligte

• Liu, Xiaodong
• Sun, Liguang
• Wei, Gangjian
• Wang, Yuhong
• Yan, Hong
• Liu, Kexin
• Wu, Xiaohong

Titel

A 1,100-year palaeoenvironmental record inferred from stable isotope and trace element compositions of ostracode and plant caryopses in sediments of Cattle Pond, Dongdao Island, South China Sea

Ist Teil von

• Journal of paleolimnology, 2008-11, Vol.40 (4), p.987-1002

Ort / Verlag

Dordrecht: Springer Netherlands

Erscheinungsjahr

2008

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Abundant ostracode valves ( Cyprinotus cingalensis ) and caryopses of Urochloa paspaloides , a terrestrial grass, were well preserved in the lacustrine sediments of the Cattle Pond on Dongdao Island, South China Sea. Oxygen and carbon isotopes, and elements (Ca, Mg) were analyzed on ostracode valves and plant caryopses in this study. The δ 18 O ostracode and δ 13 C ostracode exhibited a positive and statistically significant correlation, and showed a decreasing trend toward the top of sediment sequence with some fluctuations, indicating a gradual increase in effective moisture. The Mg/Ca ratios in the ostracode shells, generally used as a proxy for salinity changes in lake water, showed a trend toward lower values in the upper samples, reflecting a gradual decrease of salinity in the lake. The δ 13 C org values in the plant caryopses of the upper 14 cm of sediment have lower values than those in the bottom sediments, suggesting less water and salinity stress. These results indicate increasing effective moisture and rainfall intensity over the past ∼1,100 years on Dongdao Island.