2026-10-07T18:33:12Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34007724 2026-09-28T03:51:13Z category_24223 item_type_3 month_year_09_2026

Future intensified heatwaves shift microbiomes in shallow eutrophic lakes from recoverable disturbance to persistent reorganization Changqing Liu (22889075) Freshwater ecology lake heatwaves planktonic microbiomes <p dir="ltr">Climate change is intensifying lake heatwaves, yet whether increasingly intense heatwaves can constrain microbiome recovery in shallow eutrophic lakes and generate lasting ecological consequences remains unresolved. Here, we conducted a full factorial microcosm experiment using water from Lake Taihu to examine how increasing heatwave intensity, in combination with phosphorus pulses, reshapes planktonic microbiomes and ecosystem carbon metabolism across the exposure and recovery phases. Heatwaves induced pronounced but asymmetric responses across microbial domains, with an increase in prokaryotic diversity and a decrease in microeukaryotic diversity during exposure. Although alpha diversity partially recovered after the heatwave ended, compositional recovery was strongly dependent on heatwave intensity. Under the moderate heatwave, microbial communities largely converged toward the control trajectory, whereas the severe heatwave resulted in greater and more persistent compositional displacement. This persistent reorganization was associated with stronger deterministic assembly, enhanced lineage-specific environmental filtering, contraction of the stabilizing microbial core, recovery biased toward cyanobacteria, and persistent changes in cross-domain microbial association structure. Importantly, these structural legacies were accompanied by persistent metabolic decoupling. The moderate heatwave temporarily enhanced net carbon fixation, whereas the severe heatwave suppressed gross primary production while elevating respiration, resulting in a persistent carbon deficit during recovery. Collectively, our findings show that future intensified heatwaves can shift microbiomes in shallow eutrophic lakes from recoverable disturbance toward persistent reorganization while weakening carbon sink function, with broader implications for ecosystem resilience and inland water carbon cycling.</p> 2026-09-28T03:51:13Z Dataset Dataset 10.6084/m9.figshare.34007724.v1 https://figshare.com/articles/dataset/Future_intensified_heatwaves_shift_microbiomes_in_shallow_eutrophic_lakes_from_recoverable_disturbance_to_persistent_reorganization/34007724 CC BY 4.0