沂蒙山黑松林、栓皮栎林和天然次生林月凋落物量数据集（201505-201704）

自2015年5月至2017年4月，在沂蒙山（山东省费县塔山国有林场）设置了17个样地，包括黑松（Pinus thunbergii Parl.）人工林6个样地、栓皮栎（Quercus variabilis Bl.）人工林5个样地和天然次生林6个样地。天然次生林的优势树种为麻栎（Q. acutissima Carruth.）、黑松、赤松（P. densiflora Sieb. et Zucc.）和栓皮栎。在每个样地，选择林龄约为40年的树种，每月调查森林凋落物的组分和数量，得到沂蒙山黑松、栓皮栎和天然次生林月凋落物量数据集（2015-2017）。数据集内容包括：（1）样地的地理位置数据（.shp, .kmz）；（2）2015年5月-2017年4月实测每月的三种森林类型凋落物量（.xlsx）；（3）2015年5月-2017年4月实测的三种森林类型凋落物组分月凋落量，包括针叶凋落物量、阔叶凋落物量、枝凋落物量、果凋落物量和碎屑凋落物量（.xlsx）。数据分析结果表明，三种森林类型的凋落物月总量呈双峰曲线，最大峰值在10-11月，次峰值在4-5月。数据集存储为.shp, .kmz和.xlsx格式，由 8个数据文件组成，数据量为41.6 KB（压缩为2个文件，33.3 KB）。基于该数据集的相关研究成果发表在《生态学报》2018年38卷第18期。

From May 2015 to April 2017, 17 sample plots were established in the Yimeng Mountains (Tashan State-owned Forest Farm, Feixian County, Shandong Province), including 6 plots of *Pinus thunbergii* Parl. plantation, 5 plots of *Quercus variabilis* Bl. plantation, and 6 plots of natural secondary forest. The dominant tree species of the natural secondary forest are *Quercus acutissima* Carruth., *Pinus thunbergii*, *Pinus densiflora* Sieb. et Zucc., and *Quercus variabilis*. For each plot, tree stands with an approximate stand age of 40 years were selected. Monthly investigations on the components and quantity of forest litter were conducted, leading to the establishment of the Monthly Litter Production Dataset of *Pinus thunbergii*, *Quercus variabilis* and natural secondary forests in the Yimeng Mountains (2015–2017). The dataset contains three parts: (1) Geographical location data of the sample plots (stored in .shp and .kmz formats); (2) Monthly measured total litter production of the three forest types from May 2015 to April 2017 (stored in .xlsx format); (3) Monthly measured litter component production of the three forest types from May 2015 to April 2017, including needle litter, broad-leaf litter, branch litter, fruit litter and detritus litter (stored in .xlsx format). Data analysis revealed that the monthly total litter production of the three forest types follows a bimodal curve, with the primary peak occurring in October–November and the secondary peak in April–May. The dataset is stored in .shp, .kmz and .xlsx formats, consisting of 8 individual data files with a total size of 41.6 KB (compressed into 2 files with a size of 33.3 KB). Relevant research based on this dataset was published in *Acta Ecologica Sinica*, Volume 38, Issue 18, 2018.