Seasonal productivity and water use in herbaceous salt marsh plants on the South Texas Gulf Coast

This dataset contains seasonal and diurnal ecophysiological and environmental measurements for five species of herbaceous salt marsh plants: Borrichia frutescens, Salicornia virginica, Batis maritima, Monanthochloe littoralis, and Limonium nashii. Data was collected repeatedly across multiple seasons from 2024-2025 at a single coastal salt marsh site (Coyote Island, Port Aransas, Texas). Individual plants and environmental data were sampled at multiple time points throughout sampling days (approx. 05:00 am-05:00 pm) to capture finer-scale diurnal patterns. The following measurements are included in this dataset: Net CO2 assimilation (A), transpiration (E), stomatal conductance (gs), intercellular CO2 concentration (Ci), external air temperature (Tair), external relative humidity (RH), leaf-to-air vapor pressure deficit (VPD), maximum quantum efficiency of PSII (Fv/Fm), quantum yield of PSII (ΦPSII): obtained via LI-6800 Portable Photosynthesis and Fluorescence System (LiCor) Leaf/stem water potential (Ψ): obtained via Model 1505D Pressure Chamber (PMS Instruments, Inc.) Soil moisture (SM): obtained gravimetrically from 10 cm soil cores Soil porewater salinity (PW sal): obtained via centrifugation of 10 cm soil cores and measured using a refractometer Tidal creek salinity (sal): obtained in the field using a refractometer All data is in raw, unsummarized form, with the exception of raw data ouputs obtained using the LI-6800 Portable Photosynthesis System which were reformatted for analysis purposes.本数据集涵盖5种草本盐沼植物的季节与昼夜尺度生理生态及环境测量数据，所涉物种分别为：灌木银叶菊（Borrichia frutescens）、弗吉尼亚海蓬子（Salicornia virginica）、海滨巴蒂草（Batis maritima）、海滨单穗茅（Monanthochloe littoralis）以及纳什补血草（Limonium nashii）。 数据于2024-2025年的多个季节，在单个沿海盐沼站点——德克萨斯州阿兰瑟斯港土狼岛——重复采集。在采样日内的多个时间节点（约凌晨5:00至下午5:00）对单株植物及环境变量进行采样，以捕捉精细化的昼夜动态规律。 本数据集包含以下测量指标： 1. 净CO₂同化速率（A）、蒸腾速率（E）、气孔导度（gs）、胞间CO₂浓度（Ci）、外界空气温度（Tair）、外界相对湿度（RH）、叶-气水汽压差（VPD）、PSII最大量子效率（Fv/Fm）及PSII量子产额（ΦPSII）：上述指标通过LI-6800便携式光合与荧光测量系统（LiCor）获取。 2. 叶/茎水势（Ψ）：采用1505D型压力室（PMS Instruments, Inc.）测定获得。 3. 土壤含水量（SM）：通过采集10 cm土壤芯后采用重量法测得。 4. 土壤孔隙水盐度（PW sal）：通过离心10 cm土壤芯获取样本，随后使用折射仪进行盐度测定。 5. 潮汐溪盐度（sal）：野外现场采用折射仪测定。 所有数据均为未汇总的原始数据，仅LI-6800便携式光合系统所产出的原始数据为适配分析需求进行了格式重构。