Evidence map›Paper›PMID 32839336›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2020

Animal body size distribution influences the ratios of nutrients supplied to plants.

Elizabeth le Roux, Laura S van Veenhuisen, Graham I H Kerley, Joris P G M Cromsigt

Erratum issuedAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

21 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Article
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  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Diverse impacts of large herbivores.Nature ecology & evolution · 2024
    Article
  12. Article
  13. Article
  14. Review
  15. Article
  16. Smaller is better in competition for space.Proceedings. Biological sciences · 2023
    Article
  17. Article
  18. Body size-fecal nutrient patterns of mammalian herbivores.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  19. Reply to Sitters and Olde Venterink: Untangling the relative importance of processes that influence fecal nutrient stoichiometry.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  20. Predators and rainfall control spatial biogeochemistry in a landscape of fear.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors.

Elizabeth le RouxCentre for African Conservation Ecology, Department of Zoology, Nelson Mandela University, Port Elizabeth 6031, South Africa; elizabeth.liza.le.roux@gmail.com.ORCID 0000-0001-8468-8284
Laura S van VeenhuisenDepartment of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden.
Graham I H KerleyCentre for African Conservation Ecology, Department of Zoology, Nelson Mandela University, Port Elizabeth 6031, South Africa.ORCID 0000-0003-2702-5200
Joris P G M CromsigtCentre for African Conservation Ecology, Department of Zoology, Nelson Mandela University, Port Elizabeth 6031, South Africa.ORCID 0000-0002-8632-9469

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Nutrients released through herbivore feces have the potential to influence plant-available nutrients and affect primary productivity. However, herbivore species use nutrients in set stoichiometric ratios that vary with body size. Such differences in the ratios at which nutrients are used leads to differences in the ratios at which nutrients are deposited through feces. Thus, local environmental factors that affect the average body size of an herbivore community (such as predation risk and food availability) influence the ratios at which fecal nutrients are supplied to plants. Here, we assess the relationship between herbivore body size and the nitrogen-to-phosphorus ratios of herbivore feces. We examine how shifts in the average body size of an herbivore community alter the ratios at which nitrogen and phosphorus are supplied to plants and test whether such differences in the stoichiometry of nutrient supply propagate through plants. We show that dung from larger-bodied herbivores contain lower quantities of phosphorus per unit mass and were higher in N:P ratio. We demonstrate that spatial heterogeneity in visibility (a proxy for predation risk and/or food availability) and rainfall (a proxy for food availability), did not affect the overall amount of feces deposited but led to changes in the average body size of the defecating community. Feces deposited in areas of higher rainfall and reduced visibility originated from larger herbivores and were higher in N:P ratios. This indicates that processes that change the size distribution of herbivore communities, such as predation or size-biased extinction, have the potential to alter the nutrient landscape for plants.

Indexed as

Body SizeAnimalsFecesGrasslandMammalsNitrogenPhosphorusSouth AfricaNitrogenPhosphorusconsumer-driven biogeochemical cyclingecosystem stoichiometrylandscape of fearmegaherbivores

Identifiers

PMID32839336
PMCPMC7486734

What OpenQuestion holds

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Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.