Data for changing plant phosphorus acquisition strategies in relation to altered soil phosphorus fractions after wetland drainage

1. Plant phosphorus (P) acquisition strategy is considered to be an intrinsic driver behind plant succession. However, variations in plant P acquisition strategies in connection to soil P fraction changes after wetland drainage remain unclear.2. To address this issue, here we conducted a study in six distinct wetlands that experienced long-term (> 20 years) artificial drainage, with the adjacent waterlogged wetlands as a control. We analyzed plant community composition, biomass and soil P fractions, and identified three plant P acquisition strategies based on soil acid phosphatase activity, plant P resorption efficiency, and soil arbuscular mycorrhizal fungi (AMF) content.3. We found that soil calcium-bound P (P_Ca) and enzyme-extractable P (P_enzyme) were key factors influencing plant P acquisition. Soil P_Ca correlated negatively with acid phosphatase activity but positively with AMF content. Soil P_enzyme negatively impacted P resorption efficiency. The wetlands were categorized into three types and each exhibited distinct plant P acquisition strategies. These changes in strategies after drainage corresponded with shifts in soil P fractions.4. Overall, our study highlights the role of soil P fractions in explaining plant P acquisition strategies after wetland drainage, suggesting P regulations on plant succession and ecosystem services.

1. 植物磷（P）获取策略被认为是植物演替的内在驱动因素。然而，湿地排水后植物磷获取策略的变化及其与土壤磷组分变化的关联仍尚不明确。
2. 为填补这一研究空白，本研究选取6处经历了20年以上长期人工排水的不同湿地，并以邻近的积水湿地作为对照。我们分析了植物群落组成、生物量与土壤磷组分，并基于土壤酸性磷酸酶活性、植物磷回收效率以及土壤丛枝菌根真菌（arbuscular mycorrhizal fungi, AMF）含量，确定了三类植物磷获取策略。
3. 本研究结果显示，土壤钙结合态磷（P_Ca）与酶解态磷（P_enzyme）是影响植物磷获取的关键因子。土壤P_Ca与酸性磷酸酶活性呈负相关，而与AMF含量呈正相关；土壤P_enzyme则对磷回收效率存在负向影响。本研究将湿地划分为三类，每类均具有独特的植物磷获取策略，且排水后的策略变化与土壤磷组分的转变相契合。
4. 综上所述，本研究阐明了土壤磷组分在解释湿地排水后植物磷获取策略中的核心作用，表明磷元素可调控植物演替与生态系统服务功能。