Southeast wetland plant functional groups

There are presence absence records for vegetation and matched hydrological data from 687 1 x 1-m quadrats recorded from 11 wetlands and wetland complexes (28 sampled hydrological gradients referred to as transects) across the upper and lower South East of South Australia. Plant data were collected in spring 2013.

Hydrological monitoring data at each site consisted of continuous (6 hourly) surface water level data from a state agency monitoring network. Observed water levels at the monitoring instrument on the day of monitoring were related to the observed depth of water at each quadrat, assuming a flat, level water surface and obtain a datum for each quadrat relative to the monitoring instrument.

The continuous monitoring record was then used to calculate a range of different hydrological predictors indicating the variation at each quadrat. The hydrological dataset provided are the univariate summary statistics recording different aspects of surface water dynamics for each quadrat. Hydrological predictors (sum-exceedance value, hydroperiod and maximum inundation depth) were calculated for annual and seasonal periods in the three-years prior to plant data collection. See metadata and relevant publication for additional details on calculation.

Hydrological predictors for each quadrat are provided in a single matrix of sites by predictors, with relevant location details for the quadrat (xy coordinates, site, transect). Included is a single electrical conductivity class for each transect (ordinal variable - low moderate, high - see metadata).

Vegetation data are provided as a single matrix (quadrats x plant functional group) showing presence absence of each functional group in each quadrat. There is also a lookup table giving the assignment of each plant species to a plant functional group.

本数据集涵盖澳大利亚南澳大利亚州东南部上下区域的11处湿地及湿地复合系统，共设置28条采样水文梯度样带（transects），获取了687个1×1米样方（quadrats）的植被存在-缺失记录与匹配的水文数据。植物数据采集于2013年春季。

各站点的水文监测数据源自州级机构监测网络的连续地表水位观测数据，采样间隔为每6小时一次。基于水面平坦的假设前提，将监测仪器当日的观测水位与对应样方的实测水深进行关联，从而得到各该样方相对于监测仪器的基准面（datum）数据。

随后利用该连续监测记录，计算得到一系列可表征各该样方水文动态变化的水文预测变量。本数据集提供的水文数据为单变量汇总统计量，记录了每个样方地表水文过程的不同特征。本次计算的水文预测变量包括超标累积值（sum-exceedance value）、淹水周期（hydroperiod）以及最大淹没水深（maximum inundation depth），计算尺度涵盖植物数据采集前三年的年度与季节周期。相关计算的详细信息可参阅元数据（metadata）及已发表的相关研究文献。

各样方的水文预测变量以“样方-预测变量”矩阵的形式整合提供，同时附带对应样方的位置信息（xy坐标、样地、样带）。此外还包含每条样带的单一电导率等级，该变量为有序分类变量（ordinal variable），分为低、中、高三个等级——详见元数据（metadata）。

植被数据以“样方-植物功能群（plant functional group）”矩阵的形式提供，展示了每个样方内各植物功能群的存在-缺失记录。同时附带一张物种对照表，明确了各植物物种所属的植物功能群归类。