地上和地下净初级生产力：基于田间的全球草原数据库 | Bilingual | dataset

以下文章来源于生态学文献 ，作者工作室

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Net primary productivity (NPP) over global grasslands is crucial for understanding the terrestrial carbon cycling and for the assessments of wild herbivores food security. During the past few decades, numerous field investigations have been conducted to estimate grassland NPP since the measuring criterion released by the International Biological Program. However, a comprehensive NPP database, particularly for belowground NPP (BNPP), in global grasslands is rare to date. Here, field NPP measurements from 438 publications (1957–2018) in global grasslands were collected, critically filtered, and incorporated in a comprehensive global database with observations for aboveground NPP (ANPP), BNPP, total NPP (TNPP), and BNPP fraction (fBNPP). Associated information on geographical locations, climatic records, grassland types, land use patterns, manipulations subjected to manipulative experiments, sampling year of study sites, as well as NPP measurement methods are also documented. This database included 2985 entries from 1785 study sites. Among them, 806 entries contained paired data of ANPP and BNPP, resulting in the 806 fBNPP data. The study sites encompassed global grasslands with latitudinal range of 54.5° S~78.9° N, longitudinal range of 157.4° W~175.8° E, and altitudes from 0 to 5168 m above sea level, covering broad climatic gradients (−17.6 to 28.8°C in mean annual temperature and 63–2052 mm in mean annual precipitation). This global database is the world's largest paired data of ANPP and BNPP field measurements in grasslands. It can be used to study the spatio-temporal patterns of NPP and its allocation, evaluate the responses of above- and below-ground carbon components to future global changes, and validate the NPP estimation by empirical or process-based models in global grasslands. The database can be freely used for noncommercial applications. We kindly request users cite this data paper when using the database, respecting all the hard work during data compilation.

全球草原的净初级生产力（NPP）对于理解陆地碳循环和评估野生食草动物粮食安全至关重要。在过去的几十年中，自国际生物计划发布测量标准以来，已经进行了许多现场调查来估计草原NPP。然而，迄今为止，全球草原的综合NPP数据库，特别是地下NPP（BNPP）数据库很少见。在这里，收集了来自全球草原438份文献（1957-2018）的现场NPP测量结果，对其进行了严格过滤，并将其纳入一个全面的全球数据库，其中包含地上NPP（ANPP），BNPP，总NPP（TNPP）和BNPP分数（fBNPP）的观测结果。还记录了有关地理位置、气候记录、草原类型、土地利用模式、实验管理的操作、研究地点的采样年份以及NPP测量方法的相关信息。该数据库包括来自1785个研究地点的2985个条目。其中，806个条目包含ANPP和BNPP的配对数据，从而产生806个fBNPP数据。研究地点包括全球草原，纬度范围为南纬54.5°~78.9°，纵向范围为西经157.4°~175.8°E，海拔高度为0至5168 m，覆盖了广泛的气候梯度（年平均气温-17.6至28.8°C，年平均降水量为63-2052毫米）。这个全球数据库是世界上最大的草原ANPP和BNPP野外测量配对数据。可用于研究NPP的时空格局及其分配，评估地上和地下碳组分对未来全球变化的响应，并通过经验或基于过程的模型验证全球草地NPP估算。该数据库可以自由地用于非商业应用程序。

Fig. 1 Geographical distribution of the observation sites. The sampling sites are concentrated in the grasslands of Eurasia and North America, while the sites in Africa, Australia, and South American were relatively less. The dot size and color represent the number of years for measurement and the type of the data, respectively. Green dots indicate sites with data of ANPP only; ANPP & BNPP, Yellow dots indicate sites with data of both ANPP and BNPP (i.e., TNPP and fBNPP can be calculated); Red dots indicate sites with data of BNPP only; Purple dots indicate sites with data of TNPP only, and blue dots indicate sites with data of fBNPP only.

图1 观测地点的地理分布。采样点集中在欧亚大陆和北美的草原，而非洲、澳大利亚和南美洲的采样点相对较少。网点大小和颜色分别表示测量的年数和数据类型。绿点表示仅具有ANPP数据的站点;ANPP & BNPP，黄点表示同时具有ANPP和BNPP数据的站点（即可以计算TNPP和fBNPP）;红点表示仅具有BNPP数据的站点;紫点表示仅具有TNPP数据的站点，蓝点表示仅具有fBNPP数据的站点。

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https://esajournals.onlinelibrary.wiley.com/doi/full/10.1002/ecy.3904

转自：“生态科研笔记”微信公众号

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