Species-specific effects of passive warming in an Antarctic moss system

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dc.contributor.authorPrather, Hannah M.
dc.contributor.authorCasanova Katny, Angelica
dc.contributor.authorClements, Andrew F.
dc.contributor.authorChmielewski, Matthew W.
dc.contributor.authorBalkan, Mehmet A.
dc.contributor.authorShortlidge, Erin E.
dc.contributor.authorRosenstiel, Todd N.
dc.contributor.authorEppley, Sarah M.
dc.date2019
dc.date.accessioned2021-04-30T16:47:51Z
dc.date.available2021-04-30T16:47:51Z
dc.description.abstractPolar systems are experiencing rapid climate change and the high sensitivity of these Arctic and Antarctic ecosystems make them especially vulnerable to accelerated ecological transformation. In Antarctica, warming results in a mosaic of ice-free terrestrial habitats dominated by a diverse assemblage of cryptogamic plants (i.e. mosses and lichens). Although these plants provide key habitat for a wide array of microorganisms and invertebrates, we have little understanding of the interaction between trophic levels in this terrestrial ecosystem and whether there are functional effects of plant species on higher trophic levels that may alter with warming. Here, we used open top chambers on Fildes Peninsula, King George Island, Antarctica, to examine the effects of passive warming and moss species on the abiotic environment and ultimately on higher trophic levels. For the dominant mosses, Polytrichastrum alpinum and Sanionia georgicouncinata, we found species-specific effects on the abiotic environment, including moss canopy temperature and soil moisture. In addition, we found distinct shifts in sexual expression in P. alpinum plants under warming compared to mosses without warming, and invertebrate communities in this moss species were strongly correlated with plant reproduction. Mosses under warming had substantially larger total invertebrate communities, and some invertebrate taxa were influenced differentially by moss species. However, warmed moss plants showed lower fungal biomass than control moss plants, and fungal biomass differed between moss species. Our results indicate that continued warming may impact the reproductive output of Antarctic moss species, potentially altering terrestrial ecosystems dynamics from the bottom up. Understanding these effects requires clarifying the foundational, mechanistic role that individual plant species play in mediating complex interactions in Antarctica's terrestrial food webs.
dc.identifier.citationROYAL SOCIETY OPEN SCIENCE,Vol.6,,2019
dc.identifier.doi10.1098/rsos.190744
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/3593
dc.language.isoen
dc.publisherROYAL SOC
dc.sourceROYAL SOCIETY OPEN SCIENCE
dc.subject.englishbryophytes
dc.subject.englishclimate change
dc.subject.englishfungi
dc.subject.englishinvertebrates
dc.subject.englishmosses
dc.subject.englishopen top chamber
dc.titleSpecies-specific effects of passive warming in an Antarctic moss system
dc.typeArticle
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uct.indizacionSCI
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