Investigating dune‐building feedback at the plant level: Insights from a multispecies field experiment
Investigating dune‐building feedback at the plant level: Insights from a multispecies field experiment
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调查沙丘——植物层面的建筑反馈：来自多物种实地实验的见解
DOI：
10.1002/esp.4607
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发表时间：
2019
影响因子：
3.3
通讯作者：
Durán Vinent, Orencio
中科院分区：
文献类型：
--
作者：
Mullins, Elsemarie;Moore, Laura J.;Goldstein, Evan B.;Jass, Theo;Bruno, John;Durán Vinent, Orencio
沿海沙丘提供了抵御海平面上升和风暴潮的第一道防线，因此，人们对了解和模拟沙丘的形成和风暴后的恢复越来越感兴趣。然而，可用于为发展模式参数化提供经验指导的观测数据有限。为了在模型中更好地描述沙丘草生长，我们在美国弗吉尼亚州猪岛进行了为期两年的多物种移植试验，测量了植物生长对海拔和距海岸线距离的依赖关系，以及植物生长与沙粒堆积的关系。我们跟踪了叶片的总生长(长度)和地上部分的叶片长度，发现短穗沙棘(美国海滩草)和圆叶单胞菌(海燕麦)的生长量分别比大米草(盐碱地线草)多15%(尽管没有统计意义)和45%。我们的结果还表明，在两年的尺度上，所有物种的基面/额叶面积比(一个重要的模型参数)的范围是0.5-1，并且移植生长与总沙粒沉积之间存在很强的相关性，但在较短的时间尺度上不是。离海岸线的距离和海拔高度对移栽生长速度没有影响，但对成活率有影响。根据移栽成活，试验结束时植被向海的界限大约是距最高水位线30 m，海拔1.43 m，根据总水位计算，相当于不到7.5%的时间被淹。本实验的结果为这三种植物的筑丘能力提供了证据，表明S。帕特斯并不像之前认为的那样是一种维系物种，而是一种适度的沙丘建设者，尽管它的生长较少受到沙尘沉积的刺激。简略的古拉塔和你。圆锥花。©2019 John Wiley&Sons，Ltd.
Coastal foredunes provide the first line of defense against rising sea levels and storm surge and for this reason there is increasing interest in understanding and modeling foredune formation and post‐storm recovery. However, there is limited observational data available to provide empirical guidance for the development of model parameterizations. To provide guidance for improved representation of dune grass growth in models, we conducted a two‐year multi‐species transplant experiment on Hog Island, VA, U.S.A. and measured the dependence of plant growth on elevation and distance from the shoreline, as well as the relationship between plant growth and sand accumulation. We tracked total leaf growth (length) and aboveground leaf length and found thatAmmophila breviligulata(American beachgrass) andUniola paniculata(sea oats) grew more thanSpartina patens(saltmeadow cordgrass) by a factor of 15% (though not statistically significant) and 45%, respectively. Our results also suggest a range of basal/frontal area ratios (an important model parameter) from 0.5‐1 and a strong correlation between transplant growth and total sand deposition for all species at the scale of two years, but not over shorter temporal scales. Distance from the shoreline and elevation had no effect on transplant growth rate but did have an effect on survival. Based on transplant survival, the seaward limit of vegetation at the end of the experiment was approximately 30 m from the MHWL and at an elevation of 1.43 m, corresponding to inundation less than 7.5% of the time according to total water level calculations. Results from this experiment provide evidence for the dune‐building capacity of all three species, suggestingS. patensis not a maintainer species, as previously thought, but rather a moderate dune builder even though its growth is less stimulated by sand deposition thanA. breviligulataandU. paniculata. © 2019 John Wiley & Sons, Ltd.
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作者：
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DOI：
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期刊：
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DOI：
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DOI：
--
发表时间：
2011
期刊：
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