生态学杂志2018，Vol.37Issue(8)：2411-2417,7.DOI:10.13292/j.1000-4890.201808.006
太湖梅梁湾沉积物中溞属卵鞍的垂直分布及其与总氮、总磷间的关系
Vertical distribution of Daphnia ephippia and its correlation with total nitrogen and total phosphorus in the sediments of Meiliang Bay in Lake Taihu
摘要
Abstract
The vertical distribution of ephippia (or resting eggs) of Daphnia species and its correlation with the concentrations of total nitrogen and total phosphorus in the sediments (25-1 cm) of Meiliang Bay in Lake Taihu were studied. The results showed that the ephippia of three Daphnia species (D. galeata, D. pulex and D. similoides sinensis) in the sediments of Meiliang Bay were identified, with D. galeata being the dominant species. The ranges of average ephippial density and the density of ephippia containing resting eggs of Daphnia species were 0. 03-2. 01 and 0-0.33 ind·g-1 dw, respectively. The average densities of ephippia containing resting eggs of three Daphnia species at the T1 and T2 sampling points were higher than that at the T3 sampling point. In the sediment layers of 16-1 cm, the concentration of total nitrogen (TN) at the T1 sampling point and that of total phosphorus (TP) at the T2 sampling point showed obvious increasing trends, while their changes at the T3 sampling point were limited. There was a significant relationship between ephippial densities of D. pulex and TP content at the T1 sampling point (P ＜0.05), while the ephippial densities of D. similoides sinensis at the T3 sampling point and the density of ephippia containing resting eggs of D. galeata at the T2 sampling point were significantly correlated with both TN and TP contents (P＜0.05). The vertical distribution of the ephippial (or resting eggs) density of Daphnia species in the sediments could recur the historical succession of Daphnia species in lakes, which was related to the levels of total nitrogen and total phosphorus.关键词
太湖梅梁湾/沉积物/卵鞍/溞属/总氮/总磷Key words
Meiliang Bay of Lake Taihu/sediment/ephippia/Daphnia/total nitrogen/total phosphorus引用本文复制引用
何平,张坤,邓道贵,刘琪,郭红会,张婷婷,孙雨琛..太湖梅梁湾沉积物中溞属卵鞍的垂直分布及其与总氮、总磷间的关系[J].生态学杂志,2018,37(8):2411-2417,7.基金项目
国家自然科学基金项目(31370470)资助 （31370470）
