Evidence map›Paper›PMID 28973927›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2017

Soilborne fungi have host affinity and host-specific effects on seed germination and survival in a lowland tropical forest.

Carolina Sarmiento, Paul-Camilo Zalamea, James W Dalling, Adam S Davis, Simon M Stump, Jana M U'Ren, A Elizabeth Arnold

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
–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

35 citing papers in PubMed.

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  15. Metapopulations with habitat modification.Proceedings of the National Academy of Sciences of the United States of America · 2021
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Carolina SarmientoSmithsonian Tropical Research Institute, Apartado 0843-03092, Balboa, Ancon, Republic of Panama; carolinasar@gmail.com.ORCID 0000-0002-8575-7170
Paul-Camilo ZalameaSmithsonian Tropical Research Institute, Apartado 0843-03092, Balboa, Ancon, Republic of Panama.ORCID 0000-0002-0987-4164
James W DallingSmithsonian Tropical Research Institute, Apartado 0843-03092, Balboa, Ancon, Republic of Panama.
Adam S DavisGlobal Change and Photosynthesis Research Unit, Agricultural Research Service, United States Department of Agriculture, Urbana, IL 61801.ORCID 0000-0002-7196-1197
Simon M StumpDepartment of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721.
Jana M U'RenDepartment of Agricultural and Biosystems Engineering, University of Arizona, Tucson, AZ 85721.
A Elizabeth ArnoldDepartment of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The Janzen-Connell (JC) hypothesis provides a conceptual framework for explaining the maintenance of tree diversity in tropical forests. Its central tenet-that recruits experience high mortality near conspecifics and at high densities-assumes a degree of host specialization in interactions between plants and natural enemies. Studies confirming JC effects have focused primarily on spatial distributions of seedlings and saplings, leaving major knowledge gaps regarding the fate of seeds in soil and the specificity of the soilborne fungi that are their most important antagonists. Here we use a common garden experiment in a lowland tropical forest in Panama to show that communities of seed-infecting fungi are structured predominantly by plant species, with only minor influences of factors such as local soil type, forest characteristics, or time in soil (1-12 months). Inoculation experiments confirmed that fungi affected seed viability and germination in a host-specific manner and that effects on seed viability preceded seedling emergence. Seeds are critical components of reproduction for tropical trees, and the factors influencing their persistence, survival, and germination shape the populations of seedlings and saplings on which current perspectives regarding forest dynamics are based. Together these findings bring seed dynamics to light in the context of the JC hypothesis, implicating them directly in the processes that have emerged as critical for diversity maintenance in species-rich tropical forests.

Indexed as

ForestsTropical ClimateFungiGerminationHost SpecificityPlantsSeedsSoil MicrobiologydiversityJanzen–Connellpathogenpioneer speciessoil seed bank

Identifiers

PMID28973927
PMCPMC5664508

What OpenQuestion holds

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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.