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dc.contributor.author
Perrotti, Angelina G.
dc.contributor.author
Ramiadantsoa, Tanjona
dc.contributor.author
OKeefe, Jennifer
dc.contributor.author
Nuñez Otaño, Noelia Betiana
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dc.date.available
2023-06-29T17:47:28Z
dc.date.issued
2022-12
dc.identifier.citation
Perrotti, Angelina G.; Ramiadantsoa, Tanjona; OKeefe, Jennifer; Nuñez Otaño, Noelia Betiana; Uncertainty in coprophilous fungal spore concentration estimates; Frontiers Media; Frontiers in Ecology and Evolution; 10; 12-2022; 1-10
dc.identifier.issn
2296-701X
dc.identifier.uri
http://hdl.handle.net/11336/201817
dc.description.abstract
The abundance of coprophilous (dung-inhabiting) fungal spores (CFS) in sedimentary records is an increasingly popular proxy for past megaherbivore abundance that is used to study megaherbivore-vegetation interactions, timing of megaherbivore population declines and extinctions, and the introduction of domesticated herbivores. This method often relies on counting CFS alongside pollen and tracers of known concentration such as exotic pollen or synthetic microspherules. Prior work has encouraged reporting CFS abundances as accumulation rates (spores/unit2/year) or concentration (spores/unit3) instead of percentages relative to the total pollen abundance, because CFS percentages can be sensitive to fluctuations in pollen influx. In this work, we quantify the uncertainty associated with estimating concentration values at different total counts and find that high uncertainty is associated with concentration estimates using low to moderate total counts (n = 20 to 200) of individual fungal spore types and tracers. We also demonstrate the effect of varying tracer proportions, and find that larger tracer proportions result in narrower confidence intervals. Finally, the probability of encountering a CFS spore from a specific taxon occurring in moderate concentrations (1,000 spores/unit2) dramatically decreases after a low tracer count (∼50). The uncertainties in concentration estimates caused by calculating tracer proportion are a likely cause of the high observed variance in many CFS time series, especially when CFS or tracer concentrations are low. Thus, we recommend future CFS studies increase counts and report the uncertainty surrounding concentration values. For some records, reporting spore data as presence/absence rather than concentrations or counts is preferable, such as when performing high counts is not feasible.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Frontiers Media
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
COPROPHILOUS FUNGAL SPORES
dc.subject
MEGAHERBIVORE DECLINE
dc.subject
PALYNOLOGY
dc.subject
PRESENCE/ABSENCE ANALYSIS
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QUANTIFICATION METHODS
dc.subject.classification
Geociencias multidisciplinaria
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Uncertainty in coprophilous fungal spore concentration estimates
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-06-29T13:21:16Z
dc.journal.volume
10
dc.journal.pagination
1-10
dc.journal.pais
Suiza
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dc.description.fil
Fil: Perrotti, Angelina G.. University Brown; Estados Unidos
dc.description.fil
Fil: Ramiadantsoa, Tanjona. University of Wisconsin; Estados Unidos
dc.description.fil
Fil: OKeefe, Jennifer. Morehead State University; Estados Unidos
dc.description.fil
Fil: Nuñez Otaño, Noelia Betiana. Universidad Autónoma de Entre Ríos. Facultad de Ciencia y Tecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Frontiers in Ecology and Evolution
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3389/fevo.2022.1086109
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