Details

Autor(en) / Beteiligte

• Xie, Gui-Juan
• Gong, Yi
• Zhu, Fu-Cheng
• Liu, Chang-Li
• Lu, Bao-Wei
• Deng, Hui
• Tang, Xiang-Ming

Titel

Spatio-temporal Characteristics of Organic Aggregates and the Driving Factors in Typical Lakes

Ist Teil von

• Huanjing kexue, 2023-04, Vol.44 (4), p.2052

Ort / Verlag

China

Erscheinungsjahr

2023

Quelle

MEDLINE

Beschreibungen/Notizen

• Organic aggregates (OA) are the important circulation hub of matter and energy in aquatic ecosystems. However, the comparison studies on OA in lakes with different nutrient levels are limited. In this study, spatio-temporal abundances of OA and OA-attached bacteria (OAB) in oligotrophic Lake Fuxian, mesotrophic Lake Tianmu, middle-eutrophic Lake Taihu, and hyper-eutrophic Lake Xingyun were investigated in different seasons during 2019-2021 using a scanning electron microscope, epi-fluorescence microscope, and flow cytometry. The results showed that:① the annual average abundances of OA in Lake Fuxian, Lake Tianmu, Lake Taihu, and Lake Xingyun were 1.4×10 , 7.0×10 , 27.7×10 , and 16.0×10 ind·mL , whereas the annual average abundances of OAB in the four lakes were 0.3×10 , 1.9×10 , 4.9×10 , and 6.2×10 cells·mL . The ratios of OAB:total bacteria (TB) in the four lakes were 30%, 31%, 50%, and 38%, respectively. ② OA abundance in summer was significantly higher than that in autumn and winter; however, the ratio of