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首页> 外文期刊>Ecological research >Effects of environmental gradients on the performances of four dominant plants in a Chinese saltmarsh: implications for plant zonation
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Effects of environmental gradients on the performances of four dominant plants in a Chinese saltmarsh: implications for plant zonation

机译：环境梯度对中国盐沼中四种优势植物生长的影响：对植物分区的影响

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摘要

Physical conditions and biotic interactions are believed to be the determinants of plant zonation in saltmarshes. However, in rapidly developing estuarine marshes, succession is regarded as the primary process responsible for plant zonation and it is controlled mainly by environmental factors. Salinity and inundation are two important factors responsible for the distribution pattern of dominant plants in coastal saltmarshes. Here we conducted a common garden experiment as well as a field transplanting to examine the responses of four dominant saltmarsh plants (native Scirpus mariqueter, Scirpus triqueter and Phragmites australis, and exotic Spartina alterniflora) in the Yangtze River estuary to environmental gradients, which may help us understand their current and potential zonation. The results showed that Scirpus adapted to freshwater and less inundated habitats, Phragmites performed well in brackish or freshwater environments with less inundation, and Spartina tolerated the highest salinity and deepest inundation. In the harshest environments (the highest salinity and water level), only Spartina performed well. In the mild environments, however, there were only minor differences in the performances among the four species. The potential ranges of Phragmites and Spartina were predicted to be larger than their current ones, and their lower boundaries might be set by tidal scour rather than edaphic factors. With the saltmarsh succession, invasive Spartina in the Yangtze River estuary might ultimately replace Scirpus, and alter the zonal patterns of nativernsaltmarsh plants, which will lead to severe ecosystem consequences. Thus, proper management measures (e.g., repeated mowing) need to be implemented to control this invasive exotic plant, and restore the vulnerable ecosystems invaded by Spartina in the Yangtze River estuary.
机译：人们认为，物理条件和生物相互作用是盐沼中植物分区的决定因素。然而，在快速发展的河口沼泽中，演替被认为是造成植物分区的主要过程，并且主要受环境因素控制。盐度和淹没是造成沿海盐沼优势植物分布格局的两个重要因素。在这里，我们进行了一项常见的花园实验以及一次田间移植，以检查长江口的四种优势盐沼植物（本地短吻鳄，短吻鳄和南方芦苇，以及互生的互花米草）对环境梯度的响应。我们了解其当前和潜在的分区。结果表明，Scirpus适应淡水且栖息地较少，芦苇在微咸或淡水环境中的浸水较少，而Spartina耐盐度最高，浸水最深。在最恶劣的环境（最高盐度和水位）下，只有Spartina表现良好。然而，在温和的环境中，四个物种之间的性能差异很小。预测芦苇和斯巴达的潜在范围将比其当前范围大，其下限可能是由潮汐冲刷而不是由水文因素决定的。随着盐沼的演替，长江河口的入侵性斯巴达纳可能最终取代短吻鳄，并改变原生盐沼植物的带状分布，这将导致严重的生态系统后果。因此，需要采取适当的管理措施（例如，反复修剪），以控制这种外来入侵植物，并恢复长江口中的斯巴蒂娜入侵的脆弱生态系统。

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  • 来源
    《Ecological research》 |2010年第2期|p.347-358|共12页
  • 作者

    Cheng Haun Wang; rnMeng Lu; rnBo Yang; rnQiang Yang; rnXiao Dong Zhang; rnToshihiko Hara; rnBo Li;

  • 作者单位

    Coastal Ecosystems Research Station of the Yangtze River Estuary, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, #220 Handan Road, 200433 Shanghai, China;

    rnCoastal Ecosystems Research Station of the Yangtze River Estuary, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, #220 Handan Road, 200433 Shanghai, China;

    rnCoastal Ecosystems Research Station of the Yangtze River Estuary, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, #220 Handan Road, 200433 Shanghai, China;

    rnCoastal Ecosystems Research Station of the Yangtze River Estuary, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, #220 Handan Road, 200433 Shanghai, China;

    rnCoastal Ecosystems Research Station of the Yangtze River Estuary, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, #220 Handan Road, 200433 Shanghai, China;

    Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan;

    rnCoastal Ecosystems Research Station of the Yangtze River Estuary, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, #220 Handan Road, 200433 Shanghai, China;

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  • 关键词

    inundation; phragmites australis (Cav.) trin. ex steud.; plant zonation; salinity; scirpus mariqueter wang et tang; scirpus triqueter linn.; spartina alterniflora loisel;

    机译：洪水;澳洲芦苇（Cav。）博学。植物区带盐度;短尾mar猴王和唐斯克里普斯·特里奎特·林恩互花米草;

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