• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >Allochthonous and autochthonous contributions to carbon accumulation and carbon accumulation and carbon store in southeastern Australian coastal wetlands
【2h】

Allochthonous and autochthonous contributions to carbon accumulation and carbon accumulation and carbon store in southeastern Australian coastal wetlands

机译：澳大利亚东南沿海湿地的碳积累，碳积累和碳存储的异源和自生贡献

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。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Estimates of carbon store and carbon accumulation rate in mangrove and saltmarsh are beset by issues of scale and provenance. Estimates at a site do not allow scaling to regional estimates if the drivers of variability are not known. Also, carbon accumulation within soils provides a net offset only if carbon is derived in-situ, or would not otherwise be sequestered. We use a network of observation sites extending across 2000 km of southeastern Australian coastline to determine the influence of geomorphic setting and coastal wetland vegetation type on rates of carbon accumulation, carbon store and probable sources. Carbon accumulation above feldspar marker horizons over a 10-year period was driven primarily by tidal range and position in the tidal frame, and was higher for mangrove and saltmarsh dominated by Juncus kraussii than for other saltmarsh communities. The rate of carbon loss with depth varied between geomorphic settings and was the primary determinant of carbon store. A down-core enrichment in delta C-13 was consistent with an increased relative contribution of mangrove root material to soil carbon, as mangrove roots were found to be consistently enriched compared to leaves. We conclude that while surface carbon accumulation is driven primarily by tidal transport of allocthonous sediment, in-situ carbon sequestration is the dominant source of recalcitrant carbon, and that mangrove and saltmarsh carbon accumulation and store is high in temperate settings, particularly in mesotidal and fluvial geomorphic settings. © 2013, Elsevier Ltd.
机译：红树林和盐沼中碳储量和碳积累速率的估计受规模和物源问题困扰。如果不知道变异性的驱动因素，则站点的估计值不允许缩放到区域估计值。而且，仅当碳是就地获得或不会被隔离时，土壤中的碳积累才提供净抵消。我们使用横跨澳大利亚东南部海岸线2000公里的观测站点网络来确定地貌环境和沿海湿地植被类型对碳积累，碳存储和可能来源的影响。在10年的时间里，长石标志物地平线上方的碳积累主要是由潮汐范围和潮汐架中的位置驱动的，并且以红褐藻和红藻为主的红树林和盐沼的碳积累高于其他盐沼群落。碳损失的速率随深度的变化在地貌设置之间变化，并且是碳储存的主要决定因素。由于发现红树林根系与树叶相比持续富集，因此在三角洲C-13的下游核心富集与红树林根系物质对土壤碳的相对贡献增加相一致。我们得出的结论是，尽管表面碳的积累主要是由全碳沉积物的潮汐运动驱动的，但原位固碳是顽固性碳的主要来源，并且红树林和盐沼的碳积累和存储在温带环境中较高，尤其是在中生和河流环境中地貌设置。 ©2013，爱思唯尔有限公司。

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