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Nutrient enrichment increases invertebrate herbivory and pathogen damage in grasslands
Journal of Ecology ( IF 5.3 ) Pub Date : 2021-10-22 , DOI: 10.1111/1365-2745.13801
A. Ebeling 1 , A. T. Strauss 2, 3 , P. Adler 4 , C. A. Arnillas 5 , I. C. Barrio 6 , L. A. Biedermann 7 , E. T. Borer 2 , M. N. Bugalho 8 , M. C. Caldeira 9 , M. W. Cadotte 10 , P. Daleo 11 , N. Eisenhauer 12, 13 , A. Eskelinen 12, 14, 15 , P. A. Fay 16 , J. Firn 17 , P. Graff 18 , N. Hagenah 19, 20 , S. Haider 12, 21 , K. J. Komatsu 22 , R. L. McCulley 23 , C. E. Mitchell 24 , J. Moore 25 , J. Pascual 11 , P. L. Peri 26, 27 , S. A. Power 28 , S. M. Prober 29 , A. C. Risch 30 , C. Roscher 12, 14 , M. Sankaran 31, 32 , E. W. Seabloom 2 , H. Schielzeth 1 , M. Schütz 30 , K. L. Speziale 33 , M. Tedder 20 , R. Virtanen 15 , D. M. Blumenthal 34
Affiliation  

  1. Plant damage by invertebrate herbivores and pathogens influences the dynamics of grassland ecosystems, but anthropogenic changes in nitrogen and phosphorus availability can modify these relationships.
  2. Using a globally distributed experiment, we describe leaf damage on 153 plant taxa from 27 grasslands worldwide, under ambient conditions and with experimentally elevated nitrogen and phosphorus.
  3. Invertebrate damage significantly increased with nitrogen addition, especially in grasses and non-leguminous forbs. Pathogen damage increased with nitrogen in grasses and legumes but not forbs. Effects of phosphorus were generally weaker. Damage was higher in grasslands with more precipitation, but climatic conditions did not change effects of nutrients on leaf damage. On average, invertebrate damage was relatively higher on legumes and pathogen damage was relatively higher on grasses. Community-weighted mean damage reflected these functional group patterns, with no effects of N on community-weighted pathogen damage (due to opposing responses of grasses and forbs) but stronger effects of N on community-weighted invertebrate damage (due to consistent responses of grasses and forbs).
  4. Synthesis. As human-induced inputs of nitrogen and phosphorus continue to increase, understanding their impacts on invertebrate and pathogen damage becomes increasingly important. Our results demonstrate that eutrophication frequently increases plant damage and that damage increases with precipitation across a wide array of grasslands. Invertebrate and pathogen damage in grasslands is likely to increase in the future, with potential consequences for plant, invertebrate and pathogen communities, as well as the transfer of energy and nutrients across trophic levels.


中文翻译:

营养丰富增加草原无脊椎动物食草和病原体损害

  1. 无脊椎动物食草动物和病原体对植物的损害会影响草原生态系统的动态,但氮和磷可用性的人为变化可以改变这些关系。
  2. 使用全球分布的实验,我们描述了在环境条件和实验性升高的氮和磷条件下,来自全球 27 个草原的 153 个植物类群的叶片损伤。
  3. 无脊椎动物的损害随着氮的添加而显着增加,特别是在禾本科植物和非豆科杂草中。草和豆类中的病原体损害随着氮的增加而增加,而不是杂草。磷的影响普遍较弱。降水量较多的草地损害较高,但气候条件并未改变养分对叶片损害的影响。平均而言,无脊椎动物对豆类的损害相对较高,而病原体对草的损害相对较高。社区加权平均损害反映了这些功能组模式,N 对社区加权病原体损害没有影响(由于草和杂草的相反反应),但 N 对社区加权无脊椎动物损害的影响更大(由于草的一致反应)和福布斯)。
  4. 合成。随着人为输入的氮和磷不断增加,了解它们对无脊椎动物和病原体损害的影响变得越来越重要。我们的研究结果表明,富营养化经常会增加植物的损害,并且这种损害会随着大量草原的降水而增加。未来草原中的无脊椎动物和病原体损害可能会增加,对植物、无脊椎动物和病原体群落以及能量和营养物质在营养水平上的转移产生潜在影响。
更新日期:2021-10-22
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