期刊
WATER
卷 10, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/w10091136
关键词
ecosystem metabolism; shallow lakes; Pampas; land use; water management
资金
- network project PAMPA2 (CONICET)
- ANPCyT
- Universidad Nacional del Sur [PGI 24/G059]
- Inter American Institute for Global Change Research (IAI) [CRN3038]
- US NSF [GEO 1128040]
Understanding the drivers and how they affect ecosystem metabolism is essential for developing effective management policy and plans. In this study, net ecosystem production (NEP), ecosystem respiration (R), and gross primary production (GPP) rates were estimated in relation to physicochemical, hydrological, and meteorological variables in La Salada (LS) and Sauce Grande (SG), two shallow lakes located in an important agricultural region with water management. LS is a mesosaline, mesotrophic-eutrophic lake, whereas SG is a hyposaline and eutrophic lake. GPP and R showed daily and seasonal variations, with R exceeding GPP during most of the study period in both lakes. Net heterotrophic conditions prevailed during the study period (NEP LS: -1.1 mmol O-2 m(-2) day(-1) and NEP SG: -1.25 mmol O-2 m(-2) day(-1)). From data analysis, the temperature, wind speed, and lake volume are the main drivers of ecosystem metabolism for both lakes. Despite the significant differences between the two lakes, the NEP values were similar. The different hydrological characteristics (endorheic vs. flushing lake) were crucial in explaining why the two different systems presented similar ecosystem metabolic rates, emphasizing the importance of water management.
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