期刊
ECOLOGY LETTERS
卷 21, 期 10, 页码 1467-1476出版社
WILEY
DOI: 10.1111/ele.13127
关键词
Acrididae; grassland; micronutrient; nutrient limitation; prairie; sodium; tettigonidae
类别
资金
- DEB NSF [1457114, 1724663]
- Graduate Student Summer Fellowship from the University of Dayton
- Division Of Environmental Biology
- Direct For Biological Sciences [1724663, 1457114] Funding Source: National Science Foundation
The canonical factors typically thought to determine herbivore community structure often explain only a small fraction of the variation in herbivore abundance and diversity. We tested how macronutrients and relatively understudied micronutrients interacted to influence the structure of insect herbivore (orthopteran) communities. We conducted a factorial fertilisation experiment manipulating macronutrients (N and P, added together) and micronutrients (Ca, Na and K) in large plots (30 x 30 m(2)) in a Texas coastal prairie. Although no single or combination of micronutrients affected herbivore communities in the absence of additional macronutrients, macronutrients and sodium added together increased herbivore abundance by 60%, richness by 15% and diversity by 20%. These results represent the first large-scale manipulation of single micronutrients and macronutrients in concert, and revealed an herbivore community co-limited by macronutrients and Na. Our work supports an emerging paradigm that Na may be important in limiting herbivore communities.
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