data of Wulongbu peatland and Nancuo peatland

Peatland ecosystems across the Tibetan Plateau demonstrate exceptional sensitivity to climatic perturbations which serves as a primary driver of resilience dynamics and potential regime shifts. However, significant knowledge gaps persist regarding the historical trajectories of resilience in these peatlands under past climate variability, and the threshold conditions that may trigger irreversible regime shifts of in response to climatic stressors. By analyzing palaeoecological records spanning approximately six-century period, we reconstruct the temporal dynamics of diatom assemblages and plant community succession in the representative herbaceous peatland ecosystem from the southeastern Tibetan Plateau. The Wulongbu peatland initiated at approximately 480 cal yr BP due to the increasing temperature and precipitation, its autogenic process was disrupted by continuous precipitation enhancement subsequently, coupled with the valley terrain led more runoff which maintained the water table and nutrient conditions, keeping it in fen stage. Until around 60 cal yr BP, peat accumulation exceeded the threshold, runoff was no longer as the main water source, ultimately shifted into bog stage. The early warning signals based on palaeoecological records in peatlands exhibit a non-monotonic fluctuation pattern, reflecting the persistent resilience and bimodal stability of the peatland development which highlights the robustness of peatlands under climate change, with both Wulongbu and Nancuo peatlands maintaining their integrity and avoiding collapse. Based on our data, both diatom and plant communities in the ecosystem of WLB peatland underwent a regime shift, leading to a fen to bog change in the peatland. However, in NC peatland, only the plant community showed significant changes, and the peatland remained in fen stage. This resilience was further modulated by the interplay between autogenic process (like organic matter accumulation) and allogenic factors (like increased humidity). Our study offers important insights for understanding how high-altitude peatlands around the world respond resiliently to climate change.<br>We have submitted our raw data (WLBdiatomgraph. CSV, NCdiatomgraph. CSV, WLBplantgraph. CSV, NCplantgraph. CSV), secondary data used for reconstructing (Precipitation reconstruction. CSV, Temperature reconstruction. CSV) and R Script (Catena.R). This dataset consists of identification results of diatoms and plant fossils, physical and chemical properties of peat, chronology, and secondary data used for reconstructing paleoclimate青藏高原（Tibetan Plateau）全域的泥炭地（peatland）生态系统对气候扰动展现出极高的敏感性，而气候扰动是恢复力（resilience）动态变化与潜在状态转换的核心驱动因素。然而，针对过去气候变率背景下这些泥炭地的恢复力历史演化轨迹，以及可能触发气候胁迫下不可逆状态转换的阈值条件，目前仍存在显著的认知空白。本研究通过分析跨越约600年的古生态记录（palaeoecological records），重建了青藏高原东南部典型草本泥炭地生态系统中硅藻（diatom）组合与植物群落演替（plant community succession）的时间动态特征。 武隆布（Wulongbu，后文简称WLB）泥炭地约于480校准年BP（cal yr BP）时期开始发育，当时气温与降水均呈上升趋势；后续持续增强的降水打破了其自育过程（autogenic process），加之谷地地形带来更多径流，维持了该泥炭地的地下水位与营养条件，使其始终处于低位沼泽（fen）阶段。直至约60校准年BP时期，泥炭积累量突破阈值，径流不再作为主要水源，该泥炭地最终转换为高位沼泽（bog）阶段。基于泥炭地古生态记录提取的早期预警信号（early warning signals）呈现出非单调波动模式，反映出泥炭地发育过程中持续的恢复力与双峰稳定性，凸显了泥炭地在气候变化下的鲁棒性（robustness）；武隆布与南错（Nancuo，后文简称NC）泥炭地均维持了生态系统完整性，未发生崩解。基于本研究数据，WLB泥炭地生态系统中的硅藻与植物群落均发生了状态转换，推动该泥炭地从低位沼泽向高位沼泽转变。而NC泥炭地仅植物群落发生了显著变化，其始终维持在低位沼泽阶段。这种恢复力进一步受到自育过程（如有机质积累）与异源因子（allogenic factors，如湿度升高）之间相互作用的调控。本研究为理解全球高海拔泥炭地如何通过恢复力响应气候变化提供了重要见解。 本研究已提交原始数据（包括WLBdiatomgraph.csv、NCdiatomgraph.csv、WLBplantgraph.csv、NCplantgraph.csv）、用于古气候重建的辅助数据（包括Precipitation reconstruction.csv、Temperature reconstruction.csv）以及R脚本（R Script，Catena.R）。本数据集包含硅藻与植物化石的鉴定结果、泥炭的理化性质、年代学数据以及用于古气候重建的辅助数据。