Above- and belowground interactions drive habitat segregation between two cryptic species of tropical trees

dc.contributor.authorPizano, Camila
dc.contributor.authorMangan, Scott A.
dc.contributor.authorHerre, Edward Allen
dc.contributor.authorEom, Ahn-Heum
dc.contributor.authorDalling, James W.
dc.date.accessioned2011-05-17T20:13:18Z
dc.date.available2011-05-17T20:13:18Z
dc.date.issued2011
dc.description.abstractIn the lowlands of central Panama, the Neotropical pioneer tree Trema micrantha (sensu lato) exists as two cryptic species: "landslide'' Trema is restricted to landslides and road embankments, while "gap'' Trema occurs mostly in treefall gaps. In this study, we explored the relative contributions of biotic interactions and physical factors to habitat segregation in T. micrantha. Field surveys showed that soils from landslides were significantly richer in available phosphorus and harbored distinct arbuscular mycorrhizal fungal (AMF) communities compared to gap soils. Greenhouse experiments designed to determine the effect of these abiotic and biotic differences showed that: (1) both landslide and gap species performed better in sterilized soil from their own habitat, (2) the availability of phosphorus and nitrogen was limiting in gap and landslide soils, respectively, (3) a standardized AMF inoculum increased performance of both species, but primarily on gap soils, and (4) landslide and gap species performed better when sterilized soils were inoculated with the microbial inoculum from their own habitat. A field experiment confirmed that survival and growth of each species was highest in its corresponding habitat. This experiment also showed that browsing damage significantly decreased survival of gap Trema on landslides. We conclude that belowground interactions with soil microbes and aboveground interactions with herbivores contribute in fundamental ways to processes that may promote and reinforce adaptive speciation.
dc.format.extent47–56
dc.identifier0012-9658
dc.identifier.citationPizano, Camila, Mangan, Scott A., Herre, Edward Allen, Eom, Ahn-Heum, and Dalling, James W. 2011. "<a href="https://repository.si.edu/handle/10088/16218">Above- and belowground interactions drive habitat segregation between two cryptic species of tropical trees</a>." <em>Ecology</em>, 92, (1) 47–56. <a href="https://doi.org/10.1890/09-1715.1">https://doi.org/10.1890/09-1715.1</a>.
dc.identifier.issn0012-9658
dc.identifier.urihttp://hdl.handle.net/10088/16218
dc.publisherEcological Society of America
dc.relation.ispartofEcology 92 (1)
dc.titleAbove- and belowground interactions drive habitat segregation between two cryptic species of tropical trees
dc.typearticle
sro.description.unitSTRI
sro.identifier.doi10.1890/09-1715.1
sro.identifier.itemID100121
sro.identifier.refworksID70155
sro.identifier.urlhttps://repository.si.edu/handle/10088/16218
sro.publicationPlaceWashington; 1990 M Street NW, Ste 700, Washington, DC 20036 USA

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