...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Estuarine Coastal and Shelf Science >Vegetation and sediment characteristics in an expanding mangrove forest in New Zealand
【24h】

Vegetation and sediment characteristics in an expanding mangrove forest in New Zealand

机译：新西兰红树林的植被和沉积物特征

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

Mangrove expansion in inlets has been widely observed in the North Island of New Zealand over recent decades. There is just one mangrove species in New Zealand, Avicennia marina var. resinifera. Our main objective was to investigate the response of mangroves to sedimentary patterns. Remote sensing and CIS was used to quantify the change in mangrove area. Vegetation and sediment characteristics were studied across seasons from December 2009 to August 2010. Comparison of digital images in 1940 and 2003 revealed that the mangrove area in our study inlet had increased by 21%. The mangroves created a rim of high fringe mangroves surrounding high-density but low height trees in the interior. The relatively low pH level and seasonally fluctuating pore water total dissolved salt (TDS) concentration reveal potentially stressful conditions in the interior mangrove zone, which may influence the forest structure in the interior. Total organic carbon (TOC), δ~(13)C_(org) and δ~(15)N along the transect indicated an increase of autochthonous organic carbon in the surface substrate landwards. The highest carbon accumulation was not observed in the fringe zone, in spite of it having the most vigorous growth of mangroves. Instead, the highest δ~(13)C value (-23.36 ± 0.42‰, averaged over depth) and lowest C:N ratio (13.1 ± 2.0) in the fringe mangrove core reflected the preservation of allochthonous organic material in the fringe zone. Under the protection of seaward fringe mangroves, mangrove-derived carbon is retained and stored in the interior sediment.
机译：近几十年来，在新西兰北岛已广泛观察到红树林入口的膨胀。新西兰只有一种红树林，Avicennia marina var。树脂。我们的主要目的是研究红树林对沉积模式的响应。遥感和CIS被用来量化红树林面积的变化。对2009年12月至2010年8月整个季节的植被和沉积物特征进行了研究。对1940年和2003年的数字图像进行比较后，我们研究入口的红树林面积增加了21％。红树林在内部环绕着高密度但低矮的树木，形成了高边缘红树林的边缘。 pH值较低且孔隙水总溶解盐（TDS）季节性波动，揭示了内部红树林带潜在的压力条件，这可能会影响内部的森林结构。沿样条总有机碳（TOC），δ〜（13）C_（org）和δ〜（15）N表示表层基质中土体中有机碳的增加。尽管边缘区的红树林生长最为活跃，但未在边缘区观察到最高的碳累积量。取而代之的是，在边缘红树林核心中最高的δ〜（13）C值（-23.36±0.42‰，在整个深度上取平均值）和最低的C：N比（13.1±2.0）反映了边缘区中异源有机物质的保存。在沿海边缘红树林的保护下，红树林衍生的碳被保留并存储在内部沉积物中。

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