Disturbance to permanent monitoring plots at GCE sites 1-10, from 2001 to 2023.

We established permanent vegetation monitoring plots in creekbank and midmarsh at GCE sites 1-10 in 2000. A dedicated Juncus zone was later added at sites 10 and 9. Starting in 2001, when we recorded plant sizes, we also noted any disturbance to the plots. Plots were scored as normal (no visible disturbance), disturbed by wrack (wrack present in plots and stems dead or broken), disturbed by snails (>100 Littoraria per square meter and plant biomass low), disturbed by pigs (animal trail through the plot, this mostly happened at site 8 mid-marsh), initial slump (plot at the creekbank sliding into the creek based on movement of pvc poles or formation of a crevasse), and terminal slump (plot had slid far enough down that vegetation had drowned). Plots that experienced terminal slump or could not be found for any reason were scored as lost. Lost plots were replaced with a new plot in the same general area with the plot code incremented by 10. For example if plot 3 was lost, it was replaced by 13, and then in turn by 23.2000年，我们在GCE站点1至10的潮溪岸与沼泽中部区域设立了永久性植被监测样地，后续又在站点9和10增设了专属灯心草（Juncus）样区。自2001年起，在记录植株尺寸的同时，我们还会同步记录样地遭受的各类干扰情况。样地干扰类型评定为：正常（无可见干扰）、受海藻残积物（wrack）干扰（样地内存在wrack且植株茎秆枯死或折断）、受螺类干扰（每平方米滨螺（Littoraria）数量超过100只且植株生物量偏低）、受野猪干扰（样地内存在动物踩踏痕迹，此类干扰多发生于站点8的沼泽中部样地）、初始滑塌（潮溪岸样地向溪内滑移，表现为PVC立杆移位或出现裂缝）以及终末滑塌（样地滑移幅度足够大，导致植被被完全淹没）。发生终末滑塌或因任何原因无法找到的样地，将被记为丢失。丢失的样地会在同一大致区域内以新样地替代，样地编码递增10。例如，若样地3丢失，则由样地13替代，后续若再次丢失则由样地23替代。