@article {KNZ001336,
	title = {Grasshoppers (Orthoptera:  Acrididae) select vegetation patches in local-scale responses to foliar nitrogen but not phosphorus in native grassland},
	journal = {Insect Science},
	volume = {18},
	year = {2010},
	pages = {533 -540},
	abstract = {<p>Key elements such as nitrogen (N) and phosphorus (P) are often limiting relative to the nutritional needs of herbivores that feed on them. While N often limits insect herbivores in natural terrestrial ecosystems, the effect of P is poorly studied in the field, even though compelling hypotheses from the ecological stoichiometry literature predict its importance. We evaluated small-scale spatial distributions of, and herbivory by, grasshoppers among neighboring plots that vary in foliar-N and -P in tallgrass prairie. Grasshopper densities were 67\% greater in N-fertilized plots but detected no effect to grasshopper densities from P-fertilizer. Leaf damage to the dominant grass Andropogon gerardii was 32\% greater in N-fertilized plots, but no response to foliar-P was detected. Herbivore damage to a common forb, goldenrod (Solidago missouriensis), was not strongly linked by fertilizer treatments, although there was increased leaf damage in N-fertilizer treatments when no P was applied (a significant N \&times; P interaction). Under field conditions at local scales, we conclude that spatially heterogeneous distributions of grasshoppers are primarily affected by foliar-N in host plants with little evidence that P-levels contribute to the spatial patterns.</p>},
	keywords = {LTER-KNZ, Andropogon gerardii, ecological stoichiometry, insect herbivory, Konza Prairie, N-P fertilization experiment, Solidago missouriensis},
	doi = {10.1111/j.1744-7917.2010.01376.x},
	url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1744-7917.2010.01376.x},
	author = {Loaiza, V. and Jonas, J.L. and Anthony Joern}
}
@article {KNZ001167,
	title = {Does dietary-P affect feeding and performance in the mixed-feeding grasshopper (Acrididae) Melanoplus bivitattus?},
	journal = {Environmental Entomology},
	volume = {37},
	year = {2008},
	pages = {333 -339},
	abstract = {<p>Although consequences of limited dietary protein and carbohydrate to performance are well studied for terrestrial insect herbivores, the importance of phosphorus (P) remains poorly understood. We examined the significance of dietary P to performance in fifth-instar nymphs of the grasshopper Melanoplus bivittatus fed artificial diets. Consumption, digestion, developmental rate, and growth in response to different levels of P nested within standard-Protein and carbohydrate diets were determined. Developmental rate was slowest on high-P diets; protein:carbohydrate concentration and P in diets affected frass production and consumption. Approximate digestibility and conversion of digested food were primarily influenced by the protein:carbohydrate quality of the diet but not P. Mass gain was marginally lower in the low-Protein:high carbohydrate diet used in this study. At the individual level, other than small effects to developmental rate at high concentrations for M. bivittatus, dietary P otherwise seems to have little effect on nymphal performance. To the degree that it is important, effects of dietary P depend on the concentrations of protein and carbohydrate in the diet.</p>},
	keywords = {LTER-KNZ, dietary phosphorus limitation to grasshopper, multiple nutrients, nutritional ecology, nutritional indices, secological stoichiometry},
	doi = {10.1093/ee/37.2.333},
	url = {https://academic.oup.com/ee/article/37/2/333/498535},
	author = {Loaiza, V. and Jonas, J.L. and Anthony Joern}
}
