Doctoral thesis
OA Policy
English

Determination of critical processes underlying the resilience of aquatic microbial communities under distinct resource availabilities

Number of pages204
Imprimatur date2022-05-30
Defense date2022-05-11
Abstract

The number of multi-stressors that freshwater systems will face in the future is predicted to increase. Stochastic pulse perturbations such as storms and floods are well known to temporarily disrupt ecosystem services like drinking water supply, irrigation, and food provision. Eutrophication, as a press perturbation, may alter long-term ecological stability, resulting in substantial ecological, social, and economic losses. Despite all our knowledge on the effects of stochastic events and eutrophication in isolation, we know little about how their interactions can shape resilience of aquatic ecosystems. The aim of this thesis was to identify general processes of recovery and response pathways taking place after mortality pulse perturbations and assess how eutrophication can modify them. Experiments showed that eutrophication affects the type of ecological interactions unfolded after a stochastic pulse perturbation, determining the recovery pathway. Although, resource availability did not change the capability of the systems to resist or recover from pulse perturbations.

Keywords
  • Resilience
  • Resistance
  • Recovery
  • Ecological Stability
  • Environmental Perturbation
  • Press Perturbation
  • Pulse Perturbation
  • Freshwater Systems
Research groups
Funding
  • European Commission - Management of Climatic Extreme Events in Lakes Reservoirs for the Protection of Ecosystem Services [722518]
Citation (ISO format)
ALEGRE STELZER, Julio Alberto. Determination of critical processes underlying the resilience of aquatic microbial communities under distinct resource availabilities. Doctoral Thesis, 2022. doi: 10.13097/archive-ouverte/unige:161884
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Technical informations

Creation04/07/2022 17:45:00
First validation04/07/2022 17:45:00
Update04/04/2025 13:12:54
Status update17/04/2023 12:52:47
Last indexation13/05/2025 19:00:42
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