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Literature-based latitudinal distribution and possible range shifts of two US east coast dune grass species (Uniola paniculata and Ammophila breviligulata)

机译：基于文献的纬度分布和两种美国东海岸沙丘草种（Uniola paniculata和Ammophila breviligulata）的可能范围变化

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Previous work on the US Atlantic coast has generally shown that coastal foredunes are dominated by two dune grass species, Ammophila breviligulata (American beachgrass) and Uniola paniculata (sea oats). From Virginia northward, A. breviligulata dominates, while U. paniculata is the dominant grass south of Virginia. Previous work suggests that these grasses influence the shape of coastal foredunes in species-specific ways, and that they respond differently to environmental stressors; thus, it is important to know which species dominates a given dune system. The range boundaries of these two species remains unclear given the lack of comprehensive surveys. In an attempt to determine these boundaries, we conducted a literature survey of 98 studies that either stated the range limits and/or included field-based studies/observations of the two grass species. We then produced an interactive map that summarizes the locations of the surveyed papers and books. The literature review suggests that the current southern range limit for A. breviligulata is Cape Fear, NC, and the northern range limit for U. paniculata is Assateague Island, on the Maryland and Virginia border. Our data suggest a northward expansion of U. paniculata, possibly associated with warming trends observed near the northern range limit in Painter, VA. In contrast, the data regarding a range shift for A. breviligulata remain inconclusive. We also compare our literature-based map with geolocated records from the Global Biodiversity Information Facility and iNaturalist research grade crowd-sourced observations. We intend for our literature-based map to aid coastal researchers who are interested in the dynamics of these two species and the potential for their ranges to shift as a result of climate change.
机译：在美国大西洋沿岸的先前工作总体上表明，沿海的禁忌主要由两种沙丘草种控制，即美国沙草（Ammophila breviligulata）和海燕麦（Uniola paniculata）。从维吉尼亚州北部开始，以短叶紫锥菊（A. breviligulata）为主，而乌头紫锥菊（U. paniculata）是维吉尼亚州以南的优势草。先前的研究表明，这些草以特定物种的方式影响沿海森林的形态，并且它们对环境压力的反应也不同。因此，重要的是要知道哪些物种在给定的沙丘系统中占主导地位。由于缺乏全面的调查，这两个物种的范围边界仍然不清楚。为了确定这些界限，我们对98项研究进行了文献调查，这些研究指出了范围限制和/或包括了对两种草的野外研究/观察。然后，我们制作了一个交互式地图，其中总结了被调查论文和书籍的位置。文献综述表明，目前对A. breviligulata的南部范围限制是北卡罗来纳州的Cape Fear，而对U. paniculata的北部范围限制是在马里兰州和弗吉尼亚州边界的Assateague岛。我们的数据表明，U。paniculata向北扩张，可能与弗吉尼亚州Painter北部范围极限附近观测到的变暖趋势有关。相比之下，有关A.breviligulata范围移动的数据仍然没有定论。我们还将基于文献的地图与全球生物多样性信息基金和iNaturalist研究级人群来源观测数据的地理位置记录进行了比较。我们打算使用基于文献的地图，以帮助对这两种物种的动态及其范围因气候变化而变化的可能性感兴趣的沿海研究人员。

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