@article{fdi:010084756, title = {{A} whole-ecosystem experiment reveals flow-induced shifts in a stream community}, author = {{R}osero-{L}opez, {D}. and {W}alter, {M}. {T}. and {F}lecker, {A}. {S}. and {D}e {B}ievre, {B}. and {O}sorio, {R}. and {G}onzalez-{Z}eas, {D}. and {C}auvy-{F}raunie, {S}. and {D}angles, {O}livier}, editor = {}, language = {{ENG}}, abstract = {{T}he growing threat of abrupt and irreversible changes to the functioning of freshwater ecosystems compels robust measures of tipping point thresholds. {T}o determine benthic cyanobacteria regime shifts in a potable water supply system in the tropical {A}ndes, we conducted a whole ecosystem-scale experiment in which we systematically diverted 20 to 90% of streamflow and measured ecological responses. {B}enthic cyanobacteria greatly increased with a 60% flow reduction and this tipping point was related to water temperature and nitrate concentration increases, both known to boost algal productivity. {W}e supplemented our experiment with a regional survey collecting > 1450 flow-benthic algal measurements at streams varying in water abstraction levels. {W}e confirmed the tipping point flow value, albeit at a slightly lower threshold (40-50%). {A} global literature review broadly confirmed our results with a mean tipping point at 58% of flow reduction. {O}ur study provides robust in situ demonstrations of regime shift thresholds in running waters with potentially strong implications for environmental flows management. {E}xperimental stream manipulation in a mountain river system in the tropical {A}ndes initiates a regime shift of benthic cyanobacteria. {T}his whole-ecosystem experiment in conjunction with a global synthesis reveal regime shift tipping points dependent upon freshwater streamflow.}, keywords = {{EQUATEUR} ; {ANDES} ; {ZONE} {TROPICALE} ; {MONDE} ; {CAYAMBE} {COCA} {PARC} {NATIONAL} ; {CHALPI} {GRANDE} {BASSIN} {VERSANT}}, booktitle = {}, journal = {{C}ommunications {B}iology}, volume = {5}, numero = {1}, pages = {420 [8 p.]}, year = {2022}, DOI = {10.1038/s42003-022-03345-5}, URL = {https://www.documentation.ird.fr/hor/fdi:010084756}, }