Long-term eutrophication affects vertical changes of Daphnia ephippia in the sediments of a subtropical Chinese lake
Long-term eutrophication affects vertical changes of Daphnia ephippia in the sediments of a subtropical Chinese lake
复制标题
长期富营养化对中国亚热带湖泊沉积物中溞垂直变化的影响
DOI：
10.1007/s11356-019-07157-9
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发表时间：
2019-12
影响因子：
5.8
通讯作者：
Ji Lei
中科院分区：
文献类型：
--
作者：
Zhang Kun;Deng Daogui;Wang Wenping;Peng Shuixiu;Liu Fei;Ji Lei
枝藻遗骸（例如，沉积物中的水蚤（Daphniaephippia）通常能准确反映湖泊枝晶藻的历史演替。然而，描述湖泊沉积物中的空的ephippia和ephippia包含休眠卵的密度变化和环境因素之间的相互作用的机制仍然不清楚。对巢湖30 cm沉积层（相当于90 a）内的水蚤（Daphnia ephippia）的多样性和垂直变化进行了研究。D. similoides sinensis、拟扁叶蝉D. pulex和D.在湖泊沉积物中鉴定出盔藻。3种水蚤空卵和含休眠卵的卵的密度和积累速率均表现出相似的规律。表层沉积层（70年代以后）的值明显高于底层沉积层（70年代以前）。结果表明，空卵和含休眠卵的卵的密度和积累率均高于空卵和含休眠卵的卵。similoides sinensis的平均含量高于D. pulex和D.盔状花序。全氮含量与D. similoides sinensis和D.盔状花序。TP含量与D. similoides sinensis和D. galeata，而与D.蚤类（P0.05）。研究结果表明，长期的富营养化和蓝藻水华可能会显著影响富营养化湖泊沉积物中水蚤的产量及其垂直分布。
Cladoceran remains (e.g., Daphnia ephippia) in sediments are usually able to accurately reflect the historical succession of cladoceran in lakes. However, mechanisms describing the interaction between density changes of empty ephippia and ephippia containing resting eggs in lake sediments and environmental factors remain unclear. The diversity and vertical changes of Daphnia ephippia in the 30-cm sedimentary layer (equivalent to about 90 years) were investigated in a subtropical Chinese lake, Lake Chaohu. The ephippia of D. similoides sinensis, D. pulex, and D. galeata were identified in the lake sediments. The densities and accumulation rates of both empty ephippia and ephippia containing resting eggs of three Daphnia species showed similar patterns. The values in the surface sedimentary layers (after the 1970s) were notably higher than in the bottom sedimentary layers (before the 1970s). The densities and accumulation rates of both empty ephippia and ephippia containing resting eggs of D. similoides sinensis were higher than those of D. pulex and D. galeata. Highly significant relationships (P < 0.001) between the TN contents and the ephippial densities and accumulation rates of D. similoides sinensis and D. galeata. TP contents had also significant correlations with the ephippial densities and accumulation rates of D. similoides sinensis and D. galeata, whereas it was not significant correlations with those of D. pulex (P > 0.05). Our results suggested that long-term eutrophication and cyanobacterial blooms might significantly affect the production of Daphnia ephippia and their vertical distribution in the sediments in eutrophic lakes.
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DOI：
--
发表时间：
2002
期刊：
--
影响因子：
--
作者：
T. Braak;F. Cateten;P. Šmilauer
通讯作者：
T. Braak;F. Cateten;P. Šmilauer
影响因子：
--
作者：
Xiaoli Zhang;D. Deng;Zhang Kun;Wenping Wang;Ji Lei
通讯作者：
Xiaoli Zhang;D. Deng;Zhang Kun;Wenping Wang;Ji Lei
影响因子：
--
作者：
Liping Zhu;Junbo Wang;A. Brancelj
通讯作者：
Liping Zhu;Junbo Wang;A. Brancelj
影响因子：
2.6
作者：
T. Lauridsen;Jens Peder Jensen;E. Jeppesen;M. Søndergaard
通讯作者：
T. Lauridsen;Jens Peder Jensen;E. Jeppesen;M. Søndergaard
影响因子：
2.7
作者：
Hessen, DO;Rukke, NA
通讯作者：
Rukke, NA