Blog
About

5
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found
      Is Open Access

      Increased nitrogen enrichment and shifted patterns in the world’s grassland: 1860–2014

      Read this article at

      ScienceOpenPublisher
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          <p><strong>Abstract.</strong> As the largest sector on the Earth’s land surface, the livestock system is not only a major contributor to global manure excreta that perturbs the global nutrient balance, but also a major emitter of greenhouse gases that warms the climate. Much attention has been paid to nitrogen (N) fertilizer and manure N applications to global croplands, however, there is still a lack of spatially-explicit estimates of continuous time-series datasets of manure and fertilizer N inputs in global grasslands. In this study, we therefore developed three global gridded datasets at a resolution of 0.5 degree<span class="thinspace"></span>&amp;times;<span class="thinspace"></span>0.5 degree for the period 1860&amp;ndash;2014 (i.e., annual manure N deposition rate, synthetic N fertilizer use rate, and manure N application rate) by combining annual and 5-arc minute spatial data on pasture and rangeland with country-level manure and synthetic fertilizer N data from the Food and Agricultural Organization database (FAOSTAT). We found that total N inputs, sum of manure N deposition, manure and fertilizer N application to global grassland systems increased from 15.5 to 103.8<span class="thinspace"></span>Tg<span class="thinspace"></span>N<span class="thinspace"></span>yr<sup>&amp;minus;1</sup> during 1860&amp;ndash;2014. Manure N deposition accounted for 83.7<span class="thinspace"></span>% of the total N inputs, whereas manure and fertilizer N application accounted for 7.7<span class="thinspace"></span>% and 8.6<span class="thinspace"></span>%, respectively, during 2000&amp;ndash;2014. At the regional scale, hotspots of manure N deposition remained the same during 1860&amp;ndash;2014 (i.e., southern Asia, Africa, and South America), but hotspots of manure and fertilizer N application have shifted from Europe to southern Asia in the early 21st century. These three datasets could fill data gaps of N inputs in global and regional grasslands and serve as input drivers for ecosystem and biogeochemistry models to investigate the impacts of N enrichment on the global grassland system, greenhouse gas emissions, and environmental sustainability. Datasets available at <a href="https://doi.pangaea.de/10.1594/PANGAEA.892940" target="_blank">https://doi.pangaea.de/10.1594/PANGAEA.892940</a>.</p>

          Related collections

          Author and article information

          Journal
          Earth System Science Data Discussions
          Earth Syst. Sci. Data Discuss.
          Copernicus GmbH
          1866-3591
          September 18 2018
          : 1-32
          Article
          10.5194/essd-2018-94
          © 2018

          https://creativecommons.org/licenses/by/4.0/

          Comments

          Comment on this article