Changing water, phosphorus and nitrogen budgets for Valle de Bravo reservoir, water supply for Mexico City Metropolitan Area

Ramírez-Zierold, Jorge A.; Merino–Ibarra, Martín; Monroy-Ríos, Emiliano; Olson, Monica; Castillo, Fermín S.; Gallegos, Margarita E.; Vilaclara, Gloria

doi:10.1080/07438140903539790

Cited by 38 publications

(96 citation statements)

References 26 publications

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“…The interconnection of seven reservoirs in the Cutzamala water supply system would also help using water level as a management tool in VB, since managers can decide from which reservoir water is withdrawn on a daily basis, and pumping back is also possible (Ramírez-Zierold et al 2010). Since the rest of the reservoirs are not used as intensively as VB for tourism and recreation, subordinating their water level to the management needs for VB would be feasible.…”

Section: Discussionmentioning

confidence: 99%

Community metabolism in a deep (stratified) tropical reservoir during a period of high water-level fluctuations

Valdespino-Castillo

Merino–Ibarra

Jiménez-Contreras

et al. 2014

Environ Monit Assess

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As long as lakes and reservoirs are an important component of the global carbon cycle, monitoring of their metabolism is required, especially in the tropics. In particular, the response of deep reservoirs to water-level fluctuations (WLF) is an understudied field. Here, we study community metabolism through oxygen dynamics in a deep monomictic reservoir where high WLF (~10 m) have recently occurred. Simultaneous monitoring of environmental variables and zooplankton dynamics was used to assess the effects of WLF on the metabolism of the eutrophic Valle de Bravo (VB) reservoir, where cyanobacteria blooms are frequent. Mean gross primary production (Pg) was high (2.2 g C m−2 day−1), but temporal variation of Pg was low except for a drastic reduction during circulation attributed to zooplankton grazing. The trophogenic layer showed net autotrophy on an annual basis, but turned to net heterotrophy during mixing, and furthermore when the whole water-column oxygen balance was calculated, considering the aphotic respiration (Raphotic). The high total respiration resulting (3.1 g C m−2 day−1) is considered to be partly due to mixing enhanced by WLF. Net ecosystem production was equivalent to a net export of 3.4 mg CO2 m−2 day−1 to the atmosphere. Low water levels are posed to intensify boundary-mixing events driven by the wind during the stratification in VB. Long-term monitoring showed changes in the planktonic community and a strong silicon decrease that matched with low water-level periods. The effects of low water-level on metabolism and planktonic community in VB suggest that water-level manipulation could be a useful management tool to promote phytoplankton groups other than cyanobacteria.

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Section: Discussionmentioning

confidence: 99%

Community metabolism in a deep (stratified) tropical reservoir during a period of high water-level fluctuations

Valdespino-Castillo

Merino–Ibarra

Jiménez-Contreras

et al. 2014

Environ Monit Assess

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“…Data for the estimation of the phosphorus mass balance included primary and secondary data. Phosphorus balance is defined by the equation provided below as the difference between P in-puts and outputs in a time basis to estimate the difference in magnitude between in-and outflows [57].…”

Section: Phosphorus Mass Balancementioning

confidence: 99%

Phylotype Dynamics of Bacterial P Utilization Genes in Microbialites and Bacterioplankton of a Monomictic Endorheic Lake

et al. 2016

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Microbes can modulate ecosystem function since they harbor a vast genetic potential for biogeochemical cycling. The spatial and temporal dynamics of this genetic diversity should be acknowledged to establish a link between ecosystem function and community structure. In this study, we analyzed the genetic diversity of bacterial phosphorus utilization genes in two microbial assemblages, microbialites and bacterioplankton of Lake Alchichica, a semiclosed (i.e., endorheic) system with marked seasonality that varies in nutrient conditions, temperature, dissolved oxygen, and water column stability. We focused on dissolved organic phosphorus (DOP) utilization gene dynamics during contrasting mixing and stratification periods. Bacterial alkaline phosphatases (phoX and phoD) and alkaline beta-propeller phytases (bpp) were surveyed. DOP utilization genes showed different dynamics evidenced by a marked change within an intra-annual period and a differential circadian pattern of expression. Although Lake Alchichica is a semiclosed system, this dynamic turnover of phylotypes (from lake circulation to stratification) points to a different potential of DOP utilization by the microbial communities within periods. DOP utilization gene dynamics was different among genetic markers and among assemblages (microbialite vs. bacterioplankton). As estimated by the system's P mass balance, P inputs and outputs were similar in magnitude (difference was <10 %). A theoretical estimation of water column P monoesters was used to calculate the potential P fraction that can be remineralized on an annual basis. Overall, bacterial groups including Proteobacteria (Alpha and Gamma) and Bacteroidetes seem to be key participants in DOP utilization responses.

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“…However, little is known about DON in lakes and reservoirs of this region, as well as the tropical zone in general. In the few available studies, low contributions (DON:DIN [Dissolved inorganic N] ≤1) have been reported for tropical Chinese lakes (Zhang, Huo, Zan, Xi, & Zhang, ), moderate contributions (DON:DIN ≈1) for a Japanese lake (Mitamura & Saijo, ) and a Mexican reservoir (Ramírez‐Zierold et al, ), and high contributions for a tropical lake in Florida (Gu, Havens, Schelske, & Rosen, ), and equatorial lakes in Ecuador (Van Colen et al, ).…”

Section: Introductionmentioning

confidence: 99%

Dissolved organic N in shallow tropical lakes and reservoirs: Contribution to total dissolved N and relationships with eutrophication

Boëchat

Paiva-Magela

Reis

et al. 2019

Internat Rev Hydrobiol

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Dissolved organic nitrogen (DON) plays important biogeochemical and ecological roles in aquatic systems. However, little is known about its importance in small tropical lakes and reservoirs. We hypothesized that (a) DON is higher in these systems than dissolved inorganic N (DIN), and that (b) relative contributions of DON and DIN to the total dissolved nitrogen (TDN) pool decrease and increase, respectively, with trophic status. To test these hypotheses, we measured DON and DIN in six lakes and two reservoirs at the Atlantic forest‐Cerrado savanna transition in Southeast Brazil, in the rainy and the dry season. With one exception in each season, all oligo‐ and mesotrophic systems had DON:DIN ratios >1. DON:DIN ratios were negatively correlated with total phosphorus (TP). This pattern was due to high DIN, mainly ammonium, in eutrophic and hypertrophic systems. DON:DIN ratios <1 occurred at TP higher than 103 and 104 µg L−1 in the rainy and dry season, respectively. We found a general dominance of DON in near‐natural lentic systems at the Atlantic forest‐Cerrado savanna transition, which was more pronounced than that reported for other regions. Human alterations to the TDN pool may affect biological communities and ecosystem functioning of these systems.

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Changing water, phosphorus and nitrogen budgets for Valle de Bravo reservoir, water supply for Mexico City Metropolitan Area

Cited by 38 publications

References 26 publications

Community metabolism in a deep (stratified) tropical reservoir during a period of high water-level fluctuations

Community metabolism in a deep (stratified) tropical reservoir during a period of high water-level fluctuations

Phylotype Dynamics of Bacterial P Utilization Genes in Microbialites and Bacterioplankton of a Monomictic Endorheic Lake

Dissolved organic N in shallow tropical lakes and reservoirs: Contribution to total dissolved N and relationships with eutrophication

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