CBS05 Estimates of vegetation structure and composition collected on Konza Prairie watersheds and on the nearby Rannell’s Preserve

Data set includes estimates of vegetation structure and composition collected during ~monthly sampling events on Konza Prairie watersheds and on the nearby Rannell’s Preserve. Vegetation data were collected from three (prior to 2017) or 10 randomly-selected locations on each watershed; two from outside the 10-ha plot (see project abstract) and one inside the plot. We sampled vegetation on each watershed once a month, during May, June, and July. Additional vegetation data were collected from bird nest sites within ~3 days of nests failing. We used 5 sets of Daubenmire frame measures to determine percent cover of major plant functional groups (at the center of the plot and 5 m from center at the 4 cardinal directions). We estimated visual obstruction by placing a Robel Pole in the middle, and 5 m from the middle of the plot in each of the 4 cardinal directions. For each pole placement, we stood 4 m away with eye 1 m above the ground in each of 4 directions, and counting the highest 5-cm segment not completely obscured by vegetation. At nests, we also estimated the slope and aspect in the center of each plot.

本数据集涵盖康扎草原（Konza Prairie）流域及邻近的兰内尔保护区（Rannell’s Preserve）内按月开展的采样活动所采集的植被结构与组成估算数据。2017年以前，每个流域的植被数据采自3个随机选定点位；2017年起则为10个随机选定点位，其中2个位于10公顷样地之外（详见项目摘要），剩余1个位于样地内部。我们于每年5、6、7月对每个流域开展月度植被采样。此外，我们在鸟巢失败后的约3天内，于对应鸟巢点位采集了额外植被数据。我们采用5组道本迈尔框（Daubenmire frame）测量法，在样地中心以及沿东、南、西、北四个主方位距中心5米的点位，测定主要植物功能群的盖度百分比。我们通过在样地中心及四个主方位距中心5米处放置罗贝尔杆（Robel Pole）来估算植被视觉遮挡度：针对每一个杆位，我们分别从四个方向站在距该杆位4米处，视线高度为地面以上1米，统计未被植被完全遮挡的最高5厘米杆段。在鸟巢点位，我们还对每个样地中心的坡度与坡向进行了估算。