Herbivory and stoichiometric feedbacks to primary production

Jennifer Krumins, Valdis Krumins, Eric Forgoston, Lora Billings, Wim H. Van Der Putten

Research output: Contribution to journalArticleResearchpeer-review

7 Citations (Scopus)

Abstract

Established theory addresses the idea that herbivory can have positive feedbacks on nutrient flow to plants. Positive feedbacks likely emerge from a greater availability of organic carbon that primes the soil by supporting nutrient turnover through consumer and especially microbially-mediated metabolism in the detrital pool. We developed an entirely novel stoichiometric model that demonstrates the mechanism of a positive feedback. In particular, we show that sloppy or partial feeding by herbivores increases detrital carbon and nitrogen allowing for greater nitrogen mineralization and nutritive feedback to plants. The model consists of differential equations coupling flows among pools of: plants, herbivores, detrital carbon and nitrogen, and inorganic nitrogen.We test the effects of different levels of herbivore grazing completion and of the stoichiometric quality (carbon to nitrogen ratio, C:N) of the host plant. Our model analyses show that partial feeding and plant C:N interact because when herbivores are sloppy and plant biomass is diverted to the detrital pool, more mineral nitrogen is available to plants because of the stoichiometric difference between the organisms in the detrital pool and the herbivore. This model helps to identify how herbivory may feedback positively on primary production, and it mechanistically connects direct and indirect feedbacks from soil to plant production.

Original languageEnglish
Article numbere0129775
JournalPLoS ONE
Volume10
Issue number6
DOIs
StatePublished - 22 Jun 2015

Fingerprint

Herbivory
primary productivity
Nitrogen
herbivores
Feedback
nitrogen
Carbon
Nutrients
carbon
Soils
Soil
Organic carbon
Metabolism
Food
nutrients
Minerals
soil organic carbon
Biomass
carbon nitrogen ratio
Differential equations

Cite this

@article{fa52deaca3404137b459958c57e3e439,
title = "Herbivory and stoichiometric feedbacks to primary production",
abstract = "Established theory addresses the idea that herbivory can have positive feedbacks on nutrient flow to plants. Positive feedbacks likely emerge from a greater availability of organic carbon that primes the soil by supporting nutrient turnover through consumer and especially microbially-mediated metabolism in the detrital pool. We developed an entirely novel stoichiometric model that demonstrates the mechanism of a positive feedback. In particular, we show that sloppy or partial feeding by herbivores increases detrital carbon and nitrogen allowing for greater nitrogen mineralization and nutritive feedback to plants. The model consists of differential equations coupling flows among pools of: plants, herbivores, detrital carbon and nitrogen, and inorganic nitrogen.We test the effects of different levels of herbivore grazing completion and of the stoichiometric quality (carbon to nitrogen ratio, C:N) of the host plant. Our model analyses show that partial feeding and plant C:N interact because when herbivores are sloppy and plant biomass is diverted to the detrital pool, more mineral nitrogen is available to plants because of the stoichiometric difference between the organisms in the detrital pool and the herbivore. This model helps to identify how herbivory may feedback positively on primary production, and it mechanistically connects direct and indirect feedbacks from soil to plant production.",
author = "Jennifer Krumins and Valdis Krumins and Eric Forgoston and Lora Billings and {Van Der Putten}, {Wim H.}",
year = "2015",
month = "6",
day = "22",
doi = "10.1371/journal.pone.0129775",
language = "English",
volume = "10",
journal = "PloS one",
issn = "1932-6203",
publisher = "Public Library of Science",
number = "6",

}

Herbivory and stoichiometric feedbacks to primary production. / Krumins, Jennifer; Krumins, Valdis; Forgoston, Eric; Billings, Lora; Van Der Putten, Wim H.

In: PLoS ONE, Vol. 10, No. 6, e0129775, 22.06.2015.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Herbivory and stoichiometric feedbacks to primary production

AU - Krumins, Jennifer

AU - Krumins, Valdis

AU - Forgoston, Eric

AU - Billings, Lora

AU - Van Der Putten, Wim H.

PY - 2015/6/22

Y1 - 2015/6/22

N2 - Established theory addresses the idea that herbivory can have positive feedbacks on nutrient flow to plants. Positive feedbacks likely emerge from a greater availability of organic carbon that primes the soil by supporting nutrient turnover through consumer and especially microbially-mediated metabolism in the detrital pool. We developed an entirely novel stoichiometric model that demonstrates the mechanism of a positive feedback. In particular, we show that sloppy or partial feeding by herbivores increases detrital carbon and nitrogen allowing for greater nitrogen mineralization and nutritive feedback to plants. The model consists of differential equations coupling flows among pools of: plants, herbivores, detrital carbon and nitrogen, and inorganic nitrogen.We test the effects of different levels of herbivore grazing completion and of the stoichiometric quality (carbon to nitrogen ratio, C:N) of the host plant. Our model analyses show that partial feeding and plant C:N interact because when herbivores are sloppy and plant biomass is diverted to the detrital pool, more mineral nitrogen is available to plants because of the stoichiometric difference between the organisms in the detrital pool and the herbivore. This model helps to identify how herbivory may feedback positively on primary production, and it mechanistically connects direct and indirect feedbacks from soil to plant production.

AB - Established theory addresses the idea that herbivory can have positive feedbacks on nutrient flow to plants. Positive feedbacks likely emerge from a greater availability of organic carbon that primes the soil by supporting nutrient turnover through consumer and especially microbially-mediated metabolism in the detrital pool. We developed an entirely novel stoichiometric model that demonstrates the mechanism of a positive feedback. In particular, we show that sloppy or partial feeding by herbivores increases detrital carbon and nitrogen allowing for greater nitrogen mineralization and nutritive feedback to plants. The model consists of differential equations coupling flows among pools of: plants, herbivores, detrital carbon and nitrogen, and inorganic nitrogen.We test the effects of different levels of herbivore grazing completion and of the stoichiometric quality (carbon to nitrogen ratio, C:N) of the host plant. Our model analyses show that partial feeding and plant C:N interact because when herbivores are sloppy and plant biomass is diverted to the detrital pool, more mineral nitrogen is available to plants because of the stoichiometric difference between the organisms in the detrital pool and the herbivore. This model helps to identify how herbivory may feedback positively on primary production, and it mechanistically connects direct and indirect feedbacks from soil to plant production.

UR - http://www.scopus.com/inward/record.url?scp=84939222603&partnerID=8YFLogxK

U2 - 10.1371/journal.pone.0129775

DO - 10.1371/journal.pone.0129775

M3 - Article

VL - 10

JO - PloS one

JF - PloS one

SN - 1932-6203

IS - 6

M1 - e0129775

ER -