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Indirect effects of habitat disturbance on invasion : nutritious litter from a grazing resistant plant favors alien over native Collembola

dc.contributor.authorLeinaas, Hans Petteren_ZA
dc.contributor.authorBengtsson, Janen_ZA
dc.contributor.authorJanion-Scheepers, Charleneen_ZA
dc.contributor.authorChown, Steven L.en_ZA
dc.date.accessioned2017-04-05T07:28:47Z
dc.date.available2017-04-05T07:28:47Z
dc.date.issued2015
dc.identifier.citationLeinaas, H. P., Bengtsson, J., Janion-Scheepers, C. & Chown, S. L. 2015. Indirect effects of habitat disturbance on invasion : nutritious litter from a grazing resistant plant favors alien over native Collembola. Ecology and Evolution, 5(16):3462–3471, doi:10.1002/ece3.1483.
dc.identifier.issn2045-7758 (online)
dc.identifier.otherdoi:10.1002/ece3.1483
dc.identifier.urihttp://hdl.handle.net/10019.1/101483
dc.descriptionCITATION: Leinaas, H. P., Bengtsson, J., Janion-Scheepers, C. & Chown, S. L. 2015. Indirect effects of habitat disturbance on invasion : nutritious litter from a grazing resistant plant favors alien over native Collembola. Ecology and Evolution, 5(16):3462–3471, doi:10.1002/ece3.1483.
dc.descriptionThe original publication is available at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2045-7758
dc.description.abstractBiological invasions are major threats to biodiversity, with impacts that may be compounded by other forms of environmental change. Observations of high density of the invasive springtail (Collembola), Hypogastrura manubrialis in heavily grazed renosterveld vegetation in the Western Cape, South Africa, raised the question of whether the invasion was favored by changes in plant litter quality associated with habitat disturbance in this vegetation type. To examine the likely mechanisms underlying the high abundance of H. manubrialis, cages with three types of naturally occurring litter with different nutrient content were placed out in the area and collected after different periods of time. Hypogastrura manubrialis was mainly found in the nutrient-rich litter of the yellowbush (Galenia africana), which responds positively to disturbance in the form of overgrazing. This suggests that invasion may have been facilitated by a positive interaction with this grazing resistant plant. By contrast, indigenous Collembola were least abundant in yellowbush litter. Negative correlations between high abundance of H. manubrialis and the abundance and diversity of other species suggest that competitive interactions might underlie low abundance of these other species at the patch level. Group behavior enables H. manubrialis to utilize efficiently this ephemeral, high quality resource, and might improve its competitive ability. The results suggest that interactions among environmental change drivers may lead to unforeseen invasion effects. H. manubrialis is not likely to be very successful in un-grazed renosterveld, but in combination with grazing, favoring the nutrient-rich yellowbush, it may become highly invasive. Field manipulations are required to fully verify these conclusions.en_ZA
dc.description.urihttp://onlinelibrary.wiley.com/doi/10.1002/ece3.1483/full
dc.format.extent10 pages
dc.language.isoen_ZAen_ZA
dc.publisherJohn Wiley & Sons Ltd.
dc.subjectCollembolaen_ZA
dc.subjectCollembola -- South Africa -- Western Capeen_ZA
dc.subjectBiological invasionsen_ZA
dc.subjectPlants -- Effect of grazing on -- South Africa -- Western Capeen_ZA
dc.subjectRenostervelden_ZA
dc.subjectSpringtail (Collembola)en_ZA
dc.titleIndirect effects of habitat disturbance on invasion : nutritious litter from a grazing resistant plant favors alien over native Collembolaen_ZA
dc.typeArticleen_ZA
dc.description.versionPublisher's version
dc.rights.holderAuthors retain copyright


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