@article{fdi:010072851,
  title = {{S}imulated drought regimes reveal community resilience and hydrological thresholds for altered decomposition},
  author = {{P}erez, {H}. {R}. and {B}orrel, {G}. and {L}eroy, {C}{\'e}line and {C}arrias, {J}. {F}. and {C}orbara, {B}. and {S}rivastava, {D}. {S}. and {C}ereghino, {R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{F}uture climate scenarios forecast a 10-50% decline in rainfall in {E}astern {A}mazonia. {A}ltered precipitation patterns may change important ecosystem functions like decomposition through either changes in physical and chemical processes or shifts in the activity and/or composition of species. {W}e experimentally manipulated hydroperiods (length of wet:dry cycles) in a tank bromeliad ecosystem to examine impacts on leaf litter decomposition. {G}ross loss of litter mass over 112 days was greatest in continuously submersed litter, lowest in continuously dry litter, and intermediate over a range of hydroperiods ranging from eight cycles of 7 wet:7 dry days to one cycle of 56 wet:56 dry days. {T}he resilience of litter mass loss to hydroperiod length is due to a shift from biologically assisted decomposition (mostly microbial) at short wet:dry hydroperiods to physicochemical release of dissolved organic matter at longer wet:dry hydroperiods. {B}iologically assisted decomposition was maximized at wet:dry hydroperiods falling within the range of ambient conditions (12-22 consecutive dry days) but then declined under prolonged wet:dry hydroperiods (28 and 56 dry days. {F}ungal:bacterial ratios showed a similar pattern as biologically assisted decomposition to hydroperiod length. {O}ur results suggest that microbial communities confer functional resilience to altered hydroperiod in tank bromeliad ecosystems. {W}e predict a substantial decrease in biological activity relevant to decomposition under climate scenarios that increase consecutive dry days by 1.6- to 3.2-fold in our study area, whereas decreased frequency of dry periods will tend to increase the physicochemical component of decomposition.},
  keywords = {{C}limate change ; {L}eaf litter decomposition ; {R}esilience ; {D}ry:wet cycles ; {T}ank-bromeliad ecosystem ; {GUYANE} {FRANCAISE}},
  booktitle = {},
  journal = {{O}ecologia},
  volume = {187},
  numero = {1},
  pages = {267--279},
  ISSN = {0029-8549},
  year = {2018},
  DOI = {10.1007/s00442-018-4123-5},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072851},
}