RT Conference Proceedings
T1 Layered in Time: Exploring the Impact of Nearly 8 Months of Stratification on Carbon Dynamics in a Mediterranean Reservoir.
A1 Rodríguez-Gómez, Sofía
A1 Montes-Pérez, Jorge
A1 Ruiz Nieto, Miriam
A1 Ledesma-Hernández, Guillermo
A1 Warren-Jiménez, Paula
A1 Conejo-Orosa, Teresa
A1 Escot, Carmelo
A1 Moreno-Ostos, Enrique
K1 Ecosistemas mediterráneos
K1 Salud de los ecosistemas
K1 Carbono - Almacenamiento geológico
AB Ecosystem metabolism determines its role as a CO2 source or sink. In lakes and reservoirs,metabolism is conditioned by the phytoplankton community. This relationship was studiedthroughout a hydrological year in El Gergal, a Mediterranean mesotrophic and warmmonomictic reservoir used for water supply to the city of Seville, Spain. Aerobic metabolicrates (respiration and primary production) were modeled using high-resolution data, includingtemperature, PAR, oxygen, salinity, and meteorological variables. The size structure of thephytoplankton community was examined using flow cytometry. Thermal stratificationpersisted for 7.7 months. During this period the aerobic ecosystem metabolism wasautotrophic, with a net O2 production of 0.06 ± 0.03 mg l–1 day–1, and ultraphytoplankton (anintermediate size group between pico- and nanophytoplankton) dominated the community.Notably, the epilimnion was the only layer exhibiting net O2 production, while themetalimnion remained almost neutral and the hypolimnion was heterotrophic. During themixing period, El Gergal was heterotrophic (net O2 consumption: 0.12 ± 0.03 mg l–1 day–1)with picophytoplankton (the smallest size group) dominating the community. On an annualscale, El Gergal reservoir was slightly heterotrophic, raising concerns about its role as a CO2sink
YR 2024
FD 2024
LK https://hdl.handle.net/10630/32088
UL https://hdl.handle.net/10630/32088
LA eng
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 28 feb 2026