Effects of Nitrogen Addition Timing and Herbivory on Plant Diversity

dc.contributor.author Bickley, Jordann
dc.contributor.department Ecology, Evolution and Organismal Biology
dc.date 2018-02-18T19:17:05.000
dc.date.accessioned 2020-07-07T05:11:32Z
dc.date.available 2020-07-07T05:11:32Z
dc.date.issued 2017-04-11
dc.description.abstract <p>Different factors such as nutrient addition or herbivore loss are known to decrease plant species richness in tallgrass prairies. However, little is known about how variation in timing affects these factors. For example, an intense, brief addition of nitrogen (N) could have a greater effect on species richness versus persistent, low levels of N addition because of the community’s prolonged exposure to N. Furthermore, herbivore activity may reverse the effects of N temporal variation by balancing out the differences. The purpose of this project was to determine if adding a set amount of N to soil over different timeframes would change species richness with herbivory. To accomplish this, we added a constant amount of N to pots containing six tallgrass prairie plant species, in different temporal regimes. Half received all of the N pulse in the beginning of the experiment, while the other half received the same amount in weekly doses over four weeks. We measured percentage cover before and after simulated herbivory. Final biomass was also collected at the end of the experiment by cutting plants at the soil surface. We expect that the addition of N in the absence of herbivory will decrease plant species richness when compared to the N treatment with herbivory. We also expect that quick, intense levels of N will cause species richness to decline faster compared to smaller, persistent levels of N. This research addresses factors that possibly alter plant diversity in tallgrass prairie ecosystems.</p>
dc.identifier archive/lib.dr.iastate.edu/undergradresearch_symposium/2017/posters/26/
dc.identifier.articleid 1308
dc.identifier.contextkey 10574444
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath undergradresearch_symposium/2017/posters/26
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/91762
dc.relation.ispartofseries Symposium on Undergraduate Research and Creative Expression
dc.source.bitstream archive/lib.dr.iastate.edu/undergradresearch_symposium/2017/posters/26/P.9_Bickley.pdf|||Fri Jan 14 23:01:10 UTC 2022
dc.subject.disciplines Terrestrial and Aquatic Ecology
dc.title Effects of Nitrogen Addition Timing and Herbivory on Plant Diversity
dc.type event
dc.type.genre event
dspace.entity.type Publication
relation.isOrgUnitOfPublication fb57c4c9-fba7-493f-a416-7091a6ecedf1
relation.isSeriesOfPublication 6730f354-97b8-4408-bad3-7e5c3b2fca9d
thesis.degree.discipline Biology and Animal Ecology
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