@article{fdi:010080239,
  title = {{A}ltitudinal distribution limits of aquatic macroinvertebrates : an experimental test in a tropical alpine stream},
  author = {{M}adsen, {P}. {B}. and {M}orabowen, {A}. and {A}ndino, {P}. and {E}spinosa, {R}. and {C}auvy {F}rauni{\'e}, {S}. and {D}angles, {O}livier and {J}acobsen, {D}.},
  editor = {},
  language = {{ENG}},
  abstract = {1. {T}emperature and oxygen are recognised as the main drivers of altitudinal limits of species distributions. {H}owever, the two factors are linked, and both decrease with altitude, why their effects are difficult to disentangle. 2. {T}his was experimentally addressed using aquatic macroinvertebrates; larvae of {A}ndesiops ({E}phemeroptera), {C}laudioperla, ({P}lecoptera), {S}cirtes ({C}oleoptera) and {A}nomalocosmoecus ({T}richoptera), and the amphipod {H}yalella in an {E}cuadorian glacier-fed stream (4100-4500ma.s.l.). {T}he 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 (14days) effect on survival, and (iii) in situ experiments of locomotory activity as a proxy for animal response to relatively small differences in temperature (5 degrees {C} vs. 10 degrees {C}) and oxygen saturation (55% vs. 62%). 3. {T}he transplant experiment reduced survival to a varying degree among taxa, but {C}laudioperla survived well at a site where it did not naturally occur. {I}n the in situ experiment, {S}cirtes and {H}yalella decreased their activity at lower oxygen saturation, whereas {A}ndesiops and {A}nomalocosmoecus did so at a low temperature. {T}he 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. 4. {T}ogether 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.},
  keywords = {{B}enthic macroinvertebrates ; {E}cuadorian {H}igh {A}ndes ; glacier-fed stream ; locomotory activity ; oxygen saturation ; survival ; temperature ; transplantation ; {EQUATEUR} ; {ANDES}},
  booktitle = {},
  journal = {{E}cological {E}ntomology},
  volume = {40},
  numero = {5},
  pages = {629--638},
  ISSN = {0307-6946},
  year = {2015},
  DOI = {10.1111/een.12232},
  URL = {https://www.documentation.ird.fr/hor/fdi:010080239},
}