Understory vegetation response to post-tornado salvage logging

In an era of increasing natural disturbances, successful tree regeneration has grown more difficult to achieve. Disturbance notably alters forest microclimates, creating open canopy conditions that might promote growth of undesirable understory communities adept at outcompeting tree seedlings. Salvage logging, a common management response to disturbance, may further impede regeneration success. In 2013, a rare tornado in northcentral Maine, USA, and subsequent salvage operation created three clear ‘treatments’ for evaluation of post-disturbance understory regeneration: blowdown, blowdown followed by salvage logging and an undisturbed control. Ten years post tornado, we inventoried understory vegetation within each of these treatments. We used hemispherical photographs to characterize canopy openness and installed sensors to track temperature and soil moisture throughout a growing season. Results indicate distinct understory community differences among each of the treatments, with the sa..., , , # Understory vegetation response to post-salvage logging [https://doi.org/10.5061/dryad.w0vt4b90z](https://doi.org/10.5061/dryad.w0vt4b90z) This dataset contains the understory vegetation cover, coarse woody material (CWM), sapling data, fisheye photograph and TMS probe data analyzed for a manuscript in progress. Details on methods and codes are located in the metadata sheets of the dataset. Additional details about the methodology can be found in the manuscript. ## Description of the data and file structure Data are sorted among five sheets: understory vegetation, CWM, saplings, fisheye photos, and TMS. The understory vegetation data sheet lists the treatment, plot, subplot, species, percent cover and month of inventory. The CWM data sheet lists the treatment, plot, transect direction, species (if known), diameter (taken using calipers), height (to midpoint), and decay class (five-class scale). The sapling data sheet lists treatment, plot, transect direction, species, browse (prese...在自然干扰事件愈发频发的当下，林木成功更新的难度日益攀升。自然干扰会显著改变森林微气候，形成林冠开阔的生境，这可能会助长那些擅长排挤林木幼苗的有害林下群落扩张。打捞式伐木（salvage logging）作为应对自然干扰的常规林业管理手段，可能会进一步阻碍林木更新的成功率。 2013年，美国缅因州中北部发生罕见龙卷风，后续配套的打捞式伐木作业设置了三组明确的处理组，用于评估干扰后林下植被更新情况：风倒区、风倒后实施打捞式伐木的区域，以及未受干扰的对照组。在龙卷风发生十年后，我们对这三组处理区内的林下植被开展了调查。我们利用半球摄影法表征林冠开阔度，并在整个生长季布设传感器以监测气温与土壤湿度。研究结果显示，三组处理组的林下群落特征存在显著差异，相关内容详见# 伐除灾害木作业后林下植被响应（Understory vegetation response to post-salvage logging），链接：https://doi.org/10.5061/dryad.w0vt4b90z 本数据集包含正在撰写的论文中所分析的林下植被盖度、粗木质残体（coarse woody material, CWM）、幼树数据、鱼眼照片及TMS探头（TMS probe）数据。数据集的元数据表单中包含方法与代码的详细说明，相关方法论的更多细节可参阅待发表论文。 ## 数据与文件结构说明 数据集共分为五个工作表：林下植被、粗木质残体、幼树、鱼眼照片及TMS数据。林下植被工作表包含处理组、样地、小样方、物种名称、盖度百分比及调查月份等信息。粗木质残体工作表包含处理组、样地、样带方向、物种名称（若可识别）、使用卡尺测得的直径、高度（取中点值）及腐烂等级（采用五级分类标准）。幼树工作表包含处理组、样地、样带方向、物种名称、采食情况（prese...[原文未完成]）