@article{fdi:010076090, title = {{S}treamlined eco-engineering approach helps define environmental flows for tropical {A}ndean headwaters}, author = {{R}osero-{L}opez, {D}. and {W}alter, {M}. {T}. and {F}lecker, {A}. {S}. and {L}loret, {P}. and {D}e {B}ievre, {B}. and {G}onzalez-{Z}eas, {D}. and {C}alvez, {R}oger and {D}angles, {O}livier}, editor = {}, language = {{ENG}}, abstract = {{A}pplying the environmental flows concept to human-altered lotic ecosystems continues to face many practical challenges and barriers. {H}ere, we modify a previously proposed framework, the {E}co-{E}ngineering {D}ecision {S}caling, for application to part of the water supply system of {Q}uito, {E}cuador. {S}pecifically, we used feedback from engineers and water managers to develop a common set of metrics for defining flow-ecology relationships and assess managed-flow impacts on stream ecology. {A}t 12 sites over 3 years, we collected flow and benthic invertebrate data (taxonomic richness, taxa important for fish, functional feeding groups, and water quality-sensitive taxa) during wet and dry seasons. {W}e then used these data to identify flow thresholds (relative to unmanaged flows) where flow withdrawal caused visible ecological impacts. {F}or this system, reduction of flow to 20% of the annual median was detrimental to benthic communities, while reductions to 40% of the annual median flow caused a variety of responses in the system. {A} trade-off analysis of weighted metrics showed that a 50% benthic fauna richness could be sustained if dry season flows were maintained between 28% and 40% of the unmanaged median annual flow. {T}his study provides a roadmap for bridging between eco-engineering theoretical frameworks and the adoption of the environmental flows concept as actionable management thresholds.}, keywords = {invertebrates ; thresholds ; trade-offs ; water supply ; {EQUATEUR} ; {QUITO} ; {ANDES}}, booktitle = {}, journal = {{F}reshwater {B}iology}, volume = {64}, numero = {7}, pages = {1315--1325}, ISSN = {0046-5070}, year = {2019}, DOI = {10.1111/fwb.13307}, URL = {https://www.documentation.ird.fr/hor/fdi:010076090}, }