...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Lakes & Reservoirs >Resting Cladoceran Eggs And Their Contribution To Zooplankton Diversity In A Lagoon Of The Upper Parana River Floodplain
【24h】

Resting Cladoceran Eggs And Their Contribution To Zooplankton Diversity In A Lagoon Of The Upper Parana River Floodplain

机译：将克拉椰菜鸡蛋及其对Zooplankton多样性的贡献在上部Parana河洪泛区的泻湖中

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Zooplankton produce resting eggs and diapause stages as strategies to promote their survival during periods of adverse environmental conditions, thereby ensuring the community diversity. The goal of this study is to investigate the contribution of these eggs, which were present in the sediment of an isolated lagoon in the Upper Parana River floodplain, to cladoceran diversity. The species hatching from the resting eggs in the sediment do not occur in the plankton. Sediment samples were collected at six sampling sites in the Osrnar Lagoon banks, in September 2004 and June, July, August and September 2005. Zooplankton were sampled in the pelagic region, using a motorized pump (1000 L) and plankton net (68 μm). The pH, water temperature (°C), electrical conductivity (μS cm~(-1)) and dissolved oxygen concentration (mg L~(-1)) also were measured. The resting eggs were counted in the laboratory, being maintained under constant temperature and photoperiod until their analyses. The resting eggs were examined daily until hatching. A higher abundance of these eggs was observed in July, during a period of lower temperature and electrical conductivity, and higher pH and dissolved oxygen concentrations. ANOVA results indicated significant differences in resting egg abundance among the sampling months. Ceriodaphnia reticulata, Macrothrix spinosa, Ilyocryptus spinifer, Ephemeroporus tridentatus and Diaphanosoma sp. hatched from the resting eggs, although they were not observed in the plankton samples. C. reticulata was observed for the first time in this floodplain, with these study results corroborating the hypothesis that resting cladoceran eggs do contribute to zooplankton diversity in the lagoon.
机译：浮游动物在不利环境条件期间促进其生存的策略，产生休息鸡蛋和延伸阶段，从而确保社区多样性。本研究的目标是调查这些鸡蛋的贡献，这些蛋现在帕拉卡河洪泛区的孤立的泻湖沉积物中，以克拉达陶瓷多样性。从沉积物中沉积的鸡蛋孵化的物种不会发生在浮游生物中。 2004年9月和6月，7月，8月和9月，2005年7月，七月，七月，七月，七月，七月，2005年6月，使用电动泵（1000L）和浮游车网（68μm），在七月，7月和9月，Zooplankton被捕。测量pH，水温（℃），电导率（μscm〜（-1））和溶解的氧浓度（Mg L〜（-1））。在实验室中计数静止的鸡蛋，在恒温和光周期下保持直至其分析。静息鸡蛋每天检查直到孵化。在较低温度和电导率的时期，7月份在7月份观察到较高丰富的这些卵，以及更高的pH和溶解的氧浓度。 ANOVA结果表明了在采样月间休息鸡蛋丰度的显着差异。 Ceriodaphnia TeariCulata，Macrothrix Spinosa，ilyocryptus纺丝，ephemeroporus tridentatus和泻甘油瘤sp。孵出休息的鸡蛋，尽管在浮游生物样本中未观察到它们。 C.在这一洪泛平原中首次观察到Reticulata，这些研究结果证实了休息的克拉椰菜蛋确实有助于泻湖的浮游动物多样性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号