Frontiers in páramo water resources research: A multidisciplinary assessment

Mosquera, Giovanny M.; Hofstede, Robert; Bremer, Leah L.; Asbjornsen, Heidi; Carabajo-Hidalgo, Aldemar; Célleri, Rolando; Crespo, Patricio; Esquivel‐Hernández, Germain; Feyen, Jan; Manosalvas, Rossana; Marín, Franklin; Mena-Vásconez, Patricio; Montenegro-Díaz, Paola; Ochoa‐Sánchez, Ana; Pesántez, Juan; Riveros-Iregui, D. A.; Suárez, Esteban

doi:10.1016/j.scitotenv.2023.164373

Cited by 4 publications

(2 citation statements)

References 153 publications

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“…Moreover, although temperature has not been a relevant factor in simulating DOC production due to its current relative stability throughout the year (Córdova et al, 2016), it is generally reported that an uniform increase in temperature could also lead to a notable rise in carbon release (Wen et al, 2020). Consequently, a release of other elements such as metals that are strongly associated to DOC in the humid páramo could be expected in a warmer climate, posing serious concerns for future water quality (Arízaga‐Idrovo et al, 2022; Mosquera et al, 2023; Peña et al, 2023; Sánchez‐Murillo et al, 2019; Wu et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

“…Watersheds within the high Andes Mountains, for example, have steep slopes, particular climate conditions (e.g., cold temperatures, high solar radiation, and significant diurnal variations of temperature), and are vulnerable to climate change (Coltorti & Ollier, 2000; Poveda et al, 2020; Vuille et al, 2003). These wetland‐dominant watersheds provide water for millions of people living in the surrounding regions and downstream areas, including major cities such as Quito in Ecuador, Lima in Peru and La Paz in Bolivia (Celleri & Feyen, 2009; Mosquera et al, 2023; Viviroli et al, 2007). As climate change continues to impact mountain regions at a rate exceeding other ecosystems (Bradley et al, 2006), it is increasingly important to understand their complex hydro‐biogeochemical interactions that directly influence the management of water quality and security.…”

Section: Introductionmentioning

confidence: 99%

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Spatially distributed tracer‐aided modelling to explore DOC dynamics, hot spots and hot moments in a tropical mountain catchment

Pesántez,

Birkel,

Gaona

et al. 2023

Hydrological Processes

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Tracer‐aided rainfall‐runoff modelling is a promising tool for understanding catchment hydrology, particularly when tracers provide information about coupled hydrological‐biogeochemical processes. Such models allow for predicting the quality and quantity of water under changing climatic and anthropogenic conditions. Here, we present the Spatially‐distributed Tracer‐Aided Rainfall‐Runoff model with a coupled biogeochemical reactive tracer module (STARR‐DOC) to simulate dissolved organic carbon (DOC) dynamics and sources. The STARR‐DOC model was developed and tested for a humid high Andean ecosystem (páramo) using high‐resolution hourly DOC and hydrometeorological data to simulate hourly discharge and DOC at a fine spatial (10 × 10 m) resolution. Overall, the model was able to acceptably reproduce discharge (KGE ~ 0.45) and stream DOC (KGE ~ 0.69) dynamics. Spatially distributed DOC simulations were independently compared using point DOC measurements for different soil types across the catchment, which allowed for identifying DOC production hot spots and hot moments. Results showed higher hydrological connectivity between slopes and valleys with increasing precipitation. Wetter conditions also favoured DOC production (wet month = 82 mg L−1, dry month = 5 mg L−1) and transport to the stream network (DOC concentrations: during events ~15 mg L−1, during baseflows ~4 mg L−1). Our results also suggest that minor changes in meteorological conditions directly affect páramo soil water dynamics and biogeochemistry. Knowledge of when and where DOC production in mountain catchments is greatest is important for water managers to understand when they make decisions about water security, especially considering climate change predictions for the Andean region.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spatially distributed tracer‐aided modelling to explore DOC dynamics, hot spots and hot moments in a tropical mountain catchment

Pesántez,

Birkel,

Gaona

et al. 2023

Hydrological Processes

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Unearthing Earth's secrets: Exploring the environmental legacy of contaminants in soil, water, and sediments

Devendrapandi,

Balu,

Ayyappan

et al. 2024

Environmental Research

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Assessing Microbial Diversity in Páramo Soils (Multistrategy Analysis): Effects of Potato Farming and Livestock Grazing in Nevados National Natural Park, Colombia

Avellaneda-Torres,

León Sicard,

Guerra Castro

et al. 2024

Applied and Environmental Soil Science

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High Andean Páramos are very fragile neotropical ecosystems. Moreover, biodiversity in these areas is threatened by the anthropic activities of agriculture, cattle raising, and mining and has been little studied. Changes associated with potato farming and livestock grazing on microorganisms of Páramo soil of the Nevados National Natural Park (Nevados NNP) were assessed by (1) determination of physical and chemical properties (physicochemical matrix) and enzymatic activities associated (enzymatic activity matrix) with different biogeochemical cycles (C, N, and P); (2) microbial community functional diversity via evaluation of functional groups associated with carbon, nitrogen, and phosphorus cycles using cultivation-dependent techniques (arable functional group matrix and most probable number matrix); and (3) microbial diversity using cultivation-independent techniques that employ the hypervariable V5–V6 region of the 16S rRNA gene and pyrosequencing (16S-454 genus matrix and 16S-454 OTU matrix). Four of the six evaluated matrices (physicochemical, enzymatic activities, most probable number, and arable functional groups) revealed significant differences according to land use. The strategy adopted by the arable functional group matrix, in which the diversity of nitrogen fixation, phosphate solubilization, and cellulolytic compounds was evaluated, showed the most significant impacts of the different factors (land use, season, and elevation), especially those caused by potato cultivation and livestock. These results indicate that the initial impacts of potato farming and livestock grazing on the microbial community in El Bosque Village are better detected by functional diversity analysis than by molecular analysis of the 16S rRNA gene V5–V6 variable region. The results may have been caused by the type of molecular marker used in the analyses and the type of agricultural practices used by peasant farmers, which affect the functional diversity of the soil community. Among these practices are the maintenance of fallow periods greater than 7 years between each potato crop and the small proportion of cattle in relation to the total land area of the village. As the findings can be interpreted as an indicator of the early impacts of potato cultivation and livestock on microbial diversity, the effects of implementing community management plans, applying agroecological models, retaining biocultural memory, and changing agrarian structure are relevant for mitigating future changes.

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Frontiers in páramo water resources research: A multidisciplinary assessment

Cited by 4 publications

References 153 publications

Spatially distributed tracer‐aided modelling to explore DOC dynamics, hot spots and hot moments in a tropical mountain catchment

Spatially distributed tracer‐aided modelling to explore DOC dynamics, hot spots and hot moments in a tropical mountain catchment

Unearthing Earth's secrets: Exploring the environmental legacy of contaminants in soil, water, and sediments

Assessing Microbial Diversity in Páramo Soils (Multistrategy Analysis): Effects of Potato Farming and Livestock Grazing in Nevados National Natural Park, Colombia

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