Abstract:
: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 × 30 m2 ) 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.
journal_name
Ecol Lettjournal_title
Ecology lettersauthors
Prather CM,Laws AN,Cuellar JF,Reihart RW,Gawkins KM,Pennings SCdoi
10.1111/ele.13127subject
Has Abstractpub_date
2018-10-01 00:00:00pages
1467-1476issue
10eissn
1461-023Xissn
1461-0248journal_volume
21pub_type
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