...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of soil & sediments >Spartina alterniflora invasion affects methane emissions in the Yangtze River estuary
【24h】

Spartina alterniflora invasion affects methane emissions in the Yangtze River estuary

机译：互花米草的入侵影响长江口甲烷排放

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

PurposeWetlands are the largest natural sources of atmospheric methane (CH4) and are often susceptible to plant invasion and hydrological fluctuations. However, the effect of plant invasion on wetland CH4 emissions is still controversial, and little is known about the variation of invasion-induced CH4 emissions under heterogeneous conditions.Materials and methodsA pairwise experimental design between Spartina alterniflora (invasive plant) and Phragmites australis (native plant) stands in high elevation sites (H-sites) and S. alterniflora and Scirpus mariqueter (native plant) stands in low elevation sites (L-sites) of the Yangtze River estuary was used to investigate how plant invasions affect CH4 emissions and whether CH4 emission changes significantly differ between the H- and L-sites with heterogeneous conditions. A static closed chamber method was used to conduct gas sampling measurements at both H- and L-sites. In addition, plant biomass and soil properties were investigated in both invasive and native plant stands.Results and discussionCH(4) emissions from the S. alterniflora stands were all significantly higher than those from the native plant stands at both H- and L-sites. Furthermore, the difference in CH4 emissions between S. alterniflora and P. australis stands in the H-sites was significantly lower than that between S. alterniflora and S. mariqueter stands in the L-sites. Plant biomass, soil organic carbon, and microbial biomass in S. alterniflora stands were all significantly higher than those in the native plant stands in both H-sites and L-sites. The soil properties also changed. Our results indicate that the S. alterniflora invasion significantly enhanced CH4 emissions from wetlands in the Yangtze River estuary. The invasion-related CH4 emissions were highly spatially variable; this variability may have been driven by the soil's anaerobic environments, induced by hydrological dynamics.ConclusionsThese results can have important implications for improving our ability to predict invasion-induced changes in CH4 emissions from wetlands in the context of global climate change.
机译：目的湿地是大气中甲烷（CH4）的最大自然来源，通常容易受到植物入侵和水文波动的影响。然而，植物入侵对湿地CH4排放的影响仍然存在争议，关于在异质条件下入侵诱导的CH4排放变化的认识还很少。材料和方法互花米草（Spartina alterniflora）和澳洲芦苇（Phragmites australis）之间的成对实验设计植物）在长江口低海拔地区（L部位）站立在高海拔地区（H地点）和互生链球菌和短吻鳄（本地植物）上来研究植物入侵如何影响CH4排放以及是否在异质条件下，H和L位之间的CH4排放变化显着不同。静态密闭腔室方法用于在H和L站点进行气体采样测量。此外，还对入侵和原生植物林中的植物生物量和土壤性质进行了研究。结果和讨论互花米草林中CH（4）的排放量均显着高于H和L场所的原生植物林中的CH（4）排放量。 。此外，H站点互生链球菌和澳大利亚对虾的CH4排放差异显着低于L站点互生链球菌和马氏链球菌在CH4排放之间的差异。互花米草的植物生物量，土壤有机碳和微生物生物量均显着高于H和L位的天然植物。土壤特性也发生了变化。我们的结果表明，互花米草的入侵显着增强了长江口湿地CH4的排放。与入侵有关的CH4排放在空间上高度可变；这种变化可能是由水文动力学导致的土壤厌氧环境驱动的。结论这些结果对于提高我们预测在全球气候变化背景下入侵引起的湿地CH4排放变化的能力具有重要意义。

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