On the Relationship Between Sea Level and Spartina alterniflora Production
On the Relationship Between Sea Level and Spartina alterniflora Production
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DOI：
10.1007/s10021-011-9498-7
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发表时间：
2012-01-01
期刊：
影响因子：
3.7
通讯作者：
Brinson, Mark M.
中科院分区：
文献类型：
--
作者：
Kirwan, Matthew L.;Christian, Robert R.;Brinson, Mark M.
年际海平面和植物生长之间的正相关关系被认为是稳定许多沿海地貌，以应对海平面上升的加速。三角洲增长，潮汐通道网络的演变，生态系统恢复力的数值模型纳入了一个驼峰形的关系淹没和植物初级生产，植被生长增加与海平面的最佳水深或淹没频率。相比之下，我们使用长达十年的测量互花米草生物量在7个沿海弗吉尼亚州（美国）沼泽地表明，年际海平面很少是植被生长的主要决定因素。虽然我们发现不温不火的支持驼峰形的地上生产和淹没之间的关系时，被认为是不同海拔的沼泽，我们的研究结果表明，沼泽高的潮间带和低的救济海平面波动。我们认为现有的模型无法捕捉湿地的行为在这些部分的景观，并可能低估其脆弱性，海平面上升，因为海平面上升不会伴随着增强植物生长和由此产生的沉积物积累。
A positive relationship between interannual sea level and plant growth is thought to stabilize many coastal landforms responding to accelerating rates of sea level rise. Numerical models of delta growth, tidal channel network evolution, and ecosystem resilience incorporate a hump-shaped relationship between inundation and plant primary production, where vegetation growth increases with sea level up to an optimum water depth or inundation frequency. In contrast, we use decade-long measurements of Spartina alterniflora biomass in seven coastal Virginia (USA) marshes to demonstrate that interannual sea level is rarely a primary determinant of vegetation growth. Although we find tepid support for a hump-shaped relationship between aboveground production and inundation when marshes of different elevation are considered, our results suggest that marshes high in the intertidal zone and low in relief are unresponsive to sea level fluctuations. We suggest existing models are unable to capture the behavior of wetlands in these portions of the landscape, and may underestimate their vulnerability to sea level rise because sea level rise will not be accompanied by enhanced plant growth and resultant sediment accumulation.