@article{fdi:010095513, title = {{A} unified model explaining the unimodal relationship between productivity and species richness in fish communities}, author = {{F}eng, {K}. and {D}u, {X}. and {T}ao, {K}. and {Z}hang, {Y}. {H}. and {W}ang, {Y}. {D}. and {Y}uan, {J}. and {E}ros, {T}. and {W}ang, {Q}. {D}. and {H}ugueny, {B}ernard}, editor = {}, language = {{ENG}}, abstract = {{U}nderstanding the productivity-diversity relationship is central in ecology. {W}hile hypotheses exist for explaining positive and negative monotonic trends, they have never been combined into one model to account for hump-shaped patterns. {H}ere, we propose a unified model integrating the more-individuals, biomass-driven competition and environmental filtering hypotheses. {A}nalyzing fish communities along a eutrophication gradient, we reconstructed the observed hump-shaped curve between productivity and species richness. {T}wo productivity-related variables explained richness: community size (positive effect) and zooplanktivorous fish biomass (negative effect). {Z}ooplanktivores, overly favored by high productivity, likely competed with juvenile stages of other species for zooplankton, leading to species exclusions. {T}his offers rare evidence for intensified species interactions along a productivity gradient in animal communities. {C}ompetition-driven loss thus precedes stress-induced losses (e.g., hypoxia), offering potential for early-warning protocols to monitor eutrophication.}, keywords = {biomass-driven competition hypothesis ; environmental filtering ; eutrophication ; functional traits ; juvenile bottleneck ; lakes ; more individuals hypothesis ; negative species associations ; species evenness ; {Y}angtze {R}iver ; {CINE}: {YANGTSE} {COURS} {D}'{EAU}}, booktitle = {}, journal = {{E}cology {L}etters}, volume = {28}, numero = {11}, pages = {e70256 [11 p.]}, ISSN = {1461-023{X}}, year = {2025}, DOI = {10.1111/ele.70256}, URL = {https://www.documentation.ird.fr/hor/fdi:010095513}, }