Altitudinal distribution limits of aquatic macroinvertebrates: an experimental test in a tropical alpine stream.

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dc.careerCiencias Biológicases
dc.category.authorvisitoren_US
dc.contributor.authorDangles, Olivier Jacques
dc.contributor.correspondingJacobsen, Dean
dc.countryEcuadores
dc.date.accessioned2023-11-04T21:45:47Z
dc.date.available2023-11-04T21:45:47Z
dc.date.issued2015-07-03
dc.dedication.authorTPes
dc.description.abstractTemperature and oxygen are recognised as the main drivers of altitudinal limits of species distributions. However, the two factors are linked, and both decrease with altitude, why their effects are difficult to disentangle. This was experimentally addressed using aquatic macroinvertebrates; larvae of Andesiops (Ephemeroptera), Claudioperla, (Plecoptera), Scirtes (Coleoptera) and Anomalocosmoecus (Trichoptera), and the amphipod Hyalella in an Ecuadorian glacier-fed stream (4100–4500 m a.s.l.). The following were performed: (i) quantitative benthic sampling at three sites to determine altitudinal patterns in population densities, (ii) transplants of the five taxa upstream of their natural altitudinal limit to test the short-term (14 days) effect on survival, and (iii) in situ experiments of locomotory activity as a proxy for animal response to relatively small differences in temperature (5 °C vs. 10 °C) and oxygen saturation (55% vs. 62%). The transplant experiment reduced survival to a varying degree among taxa, but Claudioperla survived well at a site where it did not naturally occur. In the in situ experiment, Scirtes and Hyalella decreased their activity at lower oxygen saturation, whereas Andesiops and Anomalocosmoecus did so at a low temperature. The decrease in activity from a high to a low temperature and oxygen for the five taxa was significantly correlated with their mortality in the transplant experiment. Together the present experiments indicate that even relatively small differences in temperature and oxygen may produce effects explaining ecological patterns, and depending on the taxon, either water temperature or oxygen saturation, without clear interacting effects, are important drivers of altitudinal limits.en_US
dc.facultyCiencias Exactas y Naturaleses
dc.id.author05-H164551
dc.id.type2
dc.identifier.doi10.1111/een.12232
dc.identifier.issn1365-2311
dc.identifier.urihttps://repositorio.puce.edu.ec/handle/123456789/6102
dc.identifier.urihttp://onlinelibrary.wiley.com/doi/10.1111/een.12232/abstract?userIsAuthenticated=false&deniedAccessCustomisedMessage=
dc.indexed.databaseScimago Journal Rankes
dc.language.isoen
dc.list.authorsMadsen, P.B., Morabowen, A., Andino, P., Espinosa, R., Cauvy, S., Dangles, O., Jacobsen, D.
dc.magazine.pageRange629-638
dc.magazine.titleEcological Entomologyen_US
dc.magazine.volumeChapter40 (5)
dc.rightsClosedAccessen
dc.statepublisheden_US
dc.subjectBenthic macroinvertebrateses
dc.subjectEcuadorianes
dc.subjectHighes
dc.subjectAndeses
dc.subjectGlacier-fed-streames
dc.subjectBenthic macroinvertebrates
dc.subjectEcuadorian
dc.subjectHigh
dc.subjectAndes
dc.subjectGlacier-fed-stream
dc.titleAltitudinal distribution limits of aquatic macroinvertebrates: an experimental test in a tropical alpine stream.en_US
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