首页> 外文OA文献 >Macrophytes and periphyton carbon subsidies to bacterioplankton and zooplankton in a shallow eutrophic lake in tropical China
【2h】

Macrophytes and periphyton carbon subsidies to bacterioplankton and zooplankton in a shallow eutrophic lake in tropical China

机译:中国热带浅水富营养化湖泊中浮游细菌和浮游动物对大型植物和附生生物的补贴

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

The subsidy of carbon derived from macrophytes and associated periphyton to bacterioplankton and zooplankton in subtropical shallow eutrophic Huizhou West Lake in China was analyzed using carbon stable isotope signatures. A restored part of the lake dominated by macrophytes was compared with an unrestored phytoplankton-dominated part. Macrophytes, periphyton, seston, and zooplankton were sampled every two months to determine natural-abundance carbon isotope ratios (d13C). The d13C of phytoplankton and bacterioplankton was determined from d13C of fatty acid biomarkers. Macrophytes and associated periphyton had similar d13C values and were the most enriched in 13C of all measured organic carbon pools. A macrophyte–periphyton carbon isotopic signal was detected in particulate organic carbon, bacterioplankton, and zooplankton in the macrophyte-dominated lake part, which was demonstrated by a significant enrichment in 13C compared with the unrestored part, while phytoplankton and dissolved organic carbon had similar d13C values in both lake parts. A two-source (macrophytes–periphyton and phytoplankton) mixing model showed that macrophytes–periphyton potentially contributed 14–85% (average 55%) to bacterioplankton in the macrophyte-dominated lake part, depending on season. The macrophytes–periphyton contribution to zooplankton seasonally varied between 26% and 86%, with an average of 47%. The contribution of macrophytes–periphyton to bacterioplankton increased with increasing macrophyte biomass relative to phytoplankton biomass (indicated by chlorophyll a). Carbon from macrophytes with associated periphyton subsidizes bacterioplankton and zooplankton, likely enhancing the cascading effects of planktonic food webs, providing an additional explanation for the stability of a clear-water state in shallow lakes dominated by macrophytes.
机译:利用碳稳定同位素特征分析了中国亚热带浅层富营养化惠州西湖水生植物及其伴生的附生生物碳对浮游细菌和浮游动物的补贴。将湖中恢复了以大型植物为主的部分与未恢复的浮游植物为主的部分进行了比较。每两个月对大型植物,水生植物,游动植物和浮游动物进行采样,以确定自然丰度的碳同位素比(d13C)。根据脂肪酸生物标志物的d13C确定浮游植物和浮游植物的d13C。大型植物和相关的附生植物具有相似的d13C值,并且在所有测得的有机碳库中13C含量最高。在以大型植物为主的湖泊部分中的颗粒有机碳,细菌性浮游生物和浮游动物中检测到大型植物-附生碳的同位素信号,与未恢复的部分相比,在13C中有显着富集,而浮游植物和溶解的有机碳具有相似的d13C,这证明了这一点。两个湖泊部分的水价。有两种来源的水生植物-大型附生植物和浮游植物的混合模型显示,根据季节,大型植物-附生植物在以大型植物为主的湖泊部分可能为浮游植物贡献了14-85%(平均55%)。大型浮游植物-浮游植物对浮游动物的贡献在26%至86%之间变化,平均为47%。大型植物-附生植物对浮游植物的贡献随着大型植物生物量相对于浮游植物生物量的增加而增加(以叶绿素a表示)。大型水生植物中伴有周围植物的碳补贴了浮游细菌和浮游动物,可能增强浮游食物网的级联效应,从而为大型水生植物占主导的浅水湖泊中清水状态的稳定性提供了额外的解释。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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