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. 2018 Nov 21;8:17214. doi: 10.1038/s41598-018-35568-0

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Giving up density (GUD) ± SE measured as number of seed left in the seed-trays in AP and control enclosures. All seed trays contained 80 sunflower seeds mixed with two liters of sand. White bars represent GUD boxes in dense vegetation; grey bars represent GUD boxes in open areas. Sample size inside the bars. Letters denote statistically significant difference between bars.