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首页> 外文期刊>Northwest Science >Relationships Between Salt Marsh Vegetation and Surface Elevation in Coos Bay Estuary, Oregon
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Relationships Between Salt Marsh Vegetation and Surface Elevation in Coos Bay Estuary, Oregon

机译：俄勒冈州Coos Bay Estuary的盐沼植被和表面升高的关系

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Salt marsh habitats support a diverse array of estuarine species but are vulnerable to increased inundation resulting from sea-level rise. In order to characterize relationships between vegetation and elevation and inform assessments of risk to salt marsh communities from projected sea-level rise, we collected vegetation and elevation data at 42 salt marsh sites in Coos Bay Estuary, Oregon. For 1-m(2) plots along transects from the bayside edge to the upland, we recorded height and percent cover of all plant species present. We determined plot location and elevation at 1-m intervals with a Trimble Pathfinder Pro XRS differential GPS and TOPCON GTS223 Total Station for comparison with existing LiDAR. Cluster analysis distinguished six vegetation groups. Two low marsh groups (average elevation 1.74 and 1.91 m) were characterized by swampfire (Sarcocornia perennis) with an average height of 31 cm, and saltgrass (Distichlis spicata) with an average height of 22 cm. Plots in the high marsh groups had average elevations ranging from 2.21 to 2.57 m and were characterized by tufted hairgrass (Deschampsia cespitosa) and Oregon gumweed (Grindelia stricta var. stricta), with an average height of 50 cm and 43 cm, respectively. Mid-marsh groups (average elevations of 2.01 and 1.99 m) were dominated by Lyngbye's sedge (Carex lyngbyei) with an average height of 64 cm. The data collected along these transects allowed us to assess LiDAR elevation accuracy, identify sites where LiDAR data require correction, and provide species-specific height data for correction of LiDAR in areas of dense vegetation.
机译：盐沼栖息地支持各种各样的河口种类物种，但易受海平面上升导致的淹没增加。为了表征植被和提升之间的关系，并从预计海平面上升的盐沼社区的风险评估，我们在俄勒冈州Coos Bay Estuary的42个盐沼地区收集植被和高程数据。对于从海湾边缘到高地的横断面的1米（2）个地块，我们记录了所有植物物种的高度和百分比。我们确定了1米间隔的绘图位置和高度，带有Trimble Pathfinder Pro XRS差分GPS和Topcon GTS223总站，用于与现有的LIDAR进行比较。聚类分析尊重六个植被群。两个低沼泽组（平均升高1.74和1.91米）的特征在于沼泽火（Sarcocornia Perennis），平均高度为31厘米，平均高度为22厘米。高沼泽组的地块平均高度范围从2.21到2.57米，并被簇绒头发（Deschampsia Cestosa）和俄勒冈甘草（Grindelia stricta var。Stricta）的特征分别为50厘米和43厘米。中间沼泽组（2.01和1.99米的平均海拔）由Lyngbye的莎草（Carex Lyngbyei）主导，平均高度为64厘米。沿着这些横切收集的数据允许我们评估LIDAR高程精度，识别LIDAR数据需要校正的网站，并提供用于校正茂密植被区域的LIDAR的物种高度数据。

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