Dynamics of photosynthetic pigments in an Andean lake in Colombia

Zapata, Angela María; Rivera, Carlos; Donato‐Rondón, Jhon Ch.

doi:10.1111/j.1440-1770.2006.00288.x

Cited by 6 publications

(5 citation statements)

References 38 publications

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“…The physicochemical variables of the five tropical mountain lakes studied here presented similar characteristics to those reported by Zapata-Anzola et al, (2006) and Roldán & Ramírez (2008). The low conductivity and pH values tending towards acidity observed in this study were probably due to geomorphology and basin substrate, because the lakes located in the northeast Colombian Andes are of glacial origin and present crystalline rocks of slow chemical weathering (Flórez, 2003;Buytaert et al 2006;Bare & Ashton, 2015;Borsdorf & Stadel, 2015;Catalan & Donato, 2016).…”

Section: Physical and Chemical Variablessupporting

confidence: 85%

Expanding the knowledge of plankton diversity of tropical lakes from the Northeast Colombian Andes

Criales-Hernández

Sanchez-Lobo

Almeyda-Osorio

2020

RBT

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Introduction: A large number of planktonic communities found in tropical lakes have not yet been recorded, limiting understanding of how these ecosystems function and of the role that organisms play within them. Objective: Add new records of previously described species and to contribute to the knowledge of the planktonic communities present in tropical mountain and lowland lakes of the northeast Colombian Andes. Methods: Planktonic samples were collected and physicochemical variables measured in nine tropical lakes. Organisms were identified and a bibliographic search was carried out in databases and research articles to the identification of the new records to Colombia. Results: We present the data corresponding to six physicochemical variables measured in tropical lakes of this region and expand the existing information on organisms present in tropical lakes with a list of 391 taxa (299 phytoplankton and 92 zooplankton). The proportion of planktonic species unique to tropical lakes and the low similarity between lake types found with a Jaccard analysis indicated high heterogeneity of ecological conditions in the studied lakes. Conclusions: The 391 taxa found and 15 new records contribute to the list of planktonic organisms present in tropical lakes located in high and low areas of the Colombian northeast Andes.

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Section: Physical and Chemical Variablessupporting

confidence: 85%

Expanding the knowledge of plankton diversity of tropical lakes from the Northeast Colombian Andes

Criales-Hernández

Sanchez-Lobo

Almeyda-Osorio

2020

RBT

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“…In systems with a low tension due to exogenous conditions, factors intrinsic to the system such as seasonal variations in climate and hydrology (Martínez-Almeida & Tavera, 2005;Rivera et al, 2005;Reyes et al, 2008) and daily variations in radiation and thermal stability (Lewis, 1978;Esteves, 1998;Souza et al, 2008) may regulate the temporal dynamics of plankton. Chuza is the only reservoir where the mixing periods were caused by the combined effects of wind and rain, as has been reported for tropical mountain lakes (Gunkel, 2000;Zapata-Anzola et al, 2006;Donato, 2010); therefore, physical and chemical variables associated with climate seasonality explain an important fraction of the variability of phytoplankton in this system.…”

Section: Discussionsupporting

confidence: 53%

Factors controlling phytoplankton in tropical high-mountain drinking-water reservoirs

López¹,

Rondón²,

Zapata³

et al. 2012

Limnetica

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Factors controlling phytoplankton in tropical high-mountain drinking-water reservoirsHydraulic dynamics is one of the primary factors determining the structural and temporal changes in phytoplankton communities in reservoirs. There is little information on the factors that explain the temporal changes in biotic communities in the high-mountain reservoirs that provide water to the city of Bogotá (Colombia). Our objective was to identify the environmental factors controlling the biomass and composition of algal communities in four tropical high-mountain reservoirs. We hypothesised that hydraulic dynamics is the major determining factor in temporal changes in phytoplankton communities in tropical mountain reservoirs regardless of the nutrient concentration in the system. We studied the temporal changes in phytoplankton over five years in four reservoirs that exhibit different nutrient concentrations and hydraulic management regimes. The phytoplankton in all of the reservoirs were characterised by the dominance of Dinophyceae. Canonical correspondence analyses and Pearson's correlations showed that the water renewal rate primarily explains the phytoplankton composition, followed by total nitrogen, total phosphorous and silicates. The effect of the water renewal rate was different depending on the particular conditions in each system; thus, in reservoirs with greater hydraulic dynamics, the water renewal rate explained the selection of secondary species and dominant species adapted to a broad range of environmental conditions. In the reservoir with a higher physical stability, eventual changes in the water renewal rate shifted the dominant species, reduced diversity and altered phytoplankton succession. In the reservoir with the largest volume and lowest nutrient concentration, phytoplankton species were selected primarily based on chemical and physical variables related to climatic seasonality. Our results suggest that the model for hydraulic management of the reservoirs plays an important role: in highly dynamic reservoirs, there is a direct causal relationship between phytoplankton and physical variables such as stability and water renewal rate; in less dynamic environments, phytoplankton species growth responds primarily to water chemistry.

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“…One of the consequences is a large potential for denitrification around the oxycline; therefore, in many tropical mountain lakes, nitrate concentration is below detection limit. On the other hand, the anoxic layer is a reservoir of ammonium (Degefu and Schagerl, 2015a;Donato-Rondón, 2010;Zapata-Anzola et al, 2006) and source to the upper layers, which may show episodically high concentrations (>2-8 µmol L -1 ). Similar high values are only found in some temperate lakes during the thaw period, with ammonium entering with snow melting water (Catalan, 1992).…”

Section: Biogeochemical Pathwaysmentioning

confidence: 99%

“…Productivity temporal fluctuations in tropical lakes show higher frequency than in temperate ones due to the episodic partial (or complete) mixing of the water column. Occasionally, mixing of the whole column may increase phosphorus supply to the photic depth (Zapata-Anzola et al, 2006). However, response to this internal load may be hampered by the lack of nitrogen availability in some lakes (Donato-Rondón, 2010) (Casallas and Gunkel, 2001).…”

Section: Biogeochemical Pathwaysmentioning

confidence: 99%

Perspectives for an integrated understanding of tropical and temperate high-mountain lakes

Catalan

Rondón

2016

J Limnol

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<p>High mountain lakes are extreme freshwater ecosystems and excellent sentinels of current global change. They are likely among the most comparable ecosystems across the world. The largest contrast occurs between lakes in temperate and tropical areas. The main difference arises from the seasonal patterns of heat exchange and the external loadings (carbon, phosphorus, metals). The consequence is a water column structure based on temperature, in temperate lakes, and oxygen, in tropical lakes. This essential difference implies that, in tropical lakes, one can expect a more sustained productivity throughout the year; a higher nutrient internal loading based on the mineralization of external organic matter; higher nitrification-denitrification potential related to the oxyclines; and a higher metal mobilization due to the permanently reduced bottom layer. Quantifying and linking these and other biogeochemical pathways to particular groups of organisms is in the current agenda of high-mountain limnology. The intrinsic difficulties of the taxonomic study of many of the organisms inhabiting these systems can be now overcome with the use of molecular techniques. These techniques will not only provide a much less ambiguous taxonomic knowledge of the microscopic world, but also will unveil new biogeochemical pathways that are difficult to measure chemically and will solve biogeographical puzzles of the distribution of some macroscopic organism, tracing the relationship with other areas. Daily variability and vertical gradients in the tropics are the main factors of phytoplankton species turnover in tropical lakes; whereas seasonality is the main driver in temperate communities. The study of phytoplankton in high-mountain lakes only makes sense in an integrated view of the microscopic ecosystem. A large part of the plankton biomass is in heterotrophic, and mixotrophic organisms and prokaryotes compete for dissolved resources with eukaryotic autotrophs. In fact, high-mountain lake systems are excellent model ecosystems for applying an investigation linking airshed to sediments functional views. Additionally, the study of the mountain lakes districts as functional metacommunity units may reveal key differences in the distribution of organisms of limited (slow) dispersal. We propose that limnological studies at tropical and temperate high mountain lakes should adhere to a common general paradigm. In which biogeochemical processes are framed by the airshed-to-sediment continuum concept and the biogeographical processes in the functional lake district concept. The solid understanding of the fundamental limnological processes will facilitate stronger contributions to the assessment of the impacts of the on-going global change in remote areas.</p>

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Dynamics of photosynthetic pigments in an Andean lake in Colombia

Cited by 6 publications

References 38 publications

Expanding the knowledge of plankton diversity of tropical lakes from the Northeast Colombian Andes

Expanding the knowledge of plankton diversity of tropical lakes from the Northeast Colombian Andes

Factors controlling phytoplankton in tropical high-mountain drinking-water reservoirs

Perspectives for an integrated understanding of tropical and temperate high-mountain lakes

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