俄勒冈州库斯湾河口盐沼植被与地表高程的关系

IF 0.5 4区 环境科学与生态学 Q4 ECOLOGY
M. Santelmann, Brett A. Boisjolie, R. Flitcroft, M. Gómez
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引用次数: 4

摘要

盐沼栖息地支持多种河口物种,但容易受到海平面上升导致的洪水增加的影响。为了描述植被和海拔之间的关系,并为预测海平面上升对盐沼群落的风险评估提供信息,我们收集了俄勒冈州库斯湾河口42个盐沼地点的植被和海拔数据。对于从海湾边缘到高地的1平方米样地,我们记录了所有植物物种的高度和覆盖率。我们使用Trimble Pathfinder Pro XRS差分GPS和TOPCON GTS223全站仪以1米间隔确定地块位置和高程,并与现有激光雷达进行比较。聚类分析区分出6个植被类群。2个低沼泽类群(平均海拔1.74和1.91 m)的特征是平均高度为31 cm的沼泽(Sarcocornia perennis)和平均高度为22 cm的盐草(Distichlis spicata)。高沼泽组样地平均海拔2.21 ~ 2.57 m,以丛状毛草(Deschampsia cespitosa)和冈草(Grindelia stricta var. stricta)为特征,平均高度分别为50 cm和43 cm。沼泽中群(平均海拔2.01和1.99 m)以林桂莎草(Carex lyngbyei)为主,平均高度为64 cm。沿着这些样带收集的数据使我们能够评估激光雷达高程精度,确定需要校正激光雷达数据的地点,并为在茂密植被地区校正激光雷达提供特定物种的高度数据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Relationships between Salt Marsh Vegetation and Surface Elevation in Coos Bay Estuary, Oregon
Abstract 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-m2 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.
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来源期刊
Northwest Science
Northwest Science 环境科学-生态学
CiteScore
1.30
自引率
0.00%
发文量
23
审稿时长
>36 weeks
期刊介绍: The pages of Northwest Science are open to original and fundamental research in the basic, applied, and social sciences. All submissions are refereed by at least two qualified peer reviewers. Papers are welcome from authors outside of the Pacific Northwest if the topic is suitable to our regional audience.
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