Food Web Complexity of High Mountain Lakes is Largely Affected by Glacial Retreat

Ecosystems ◽  
2019 ◽  
Vol 23 (5) ◽  
pp. 1093-1106 ◽  
Author(s):  
Rocco Tiberti ◽  
Francesco Buscaglia ◽  
Cristiana Callieri ◽  
Michela Rogora ◽  
Gabriele Tartari ◽  
...  
Keyword(s):  
Food Web ◽  
Mountain Lakes ◽  
High Mountain ◽  
High Mountain Lakes ◽  
Glacial Retreat ◽  
Food Web Complexity

Food web reliance on allochthonous carbon in two high mountain lakes with contrasting catchments: a stable isotope approach

2005 ◽  
Vol 62 (11) ◽  
pp. 2640-2648 ◽  
Author(s):  
Elvira Pulido-Villena ◽  
Isabel Reche ◽  
Rafael Morales-Baquero
Keyword(s):  
Organic Matter ◽  
Food Web ◽  
Particulate Organic Matter ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Isotopic Signature ◽  
Mountain Lakes ◽  
High Mountain ◽  
Terrestrial Carbon ◽  
High Mountain Lakes

The carbon isotopic signature (δ13C) of dissolved inorganic carbon and food web components was examined in two high mountain lakes. Río Seco Lake is partially surrounded by alpine meadows and has temporal inlets, whereas La Caldera Lake is located on rocky terrain and does not receive inputs from runoff. We assessed whether these contrasting catchments involve differences in the isotopic signature of the food web components and then in the reliance on terrestrial carbon. The δ13C of dissolved inorganic carbon was not significantly different between lakes and reflected an atmospheric gas exchange origin. Unexpectedly, bulk particulate organic matter showed enriched δ13C values in both lakes, suggesting a terrestrial vegetation influence. Bulk particulate organic matter was exploited mostly by the cladoceran Daphnia pulicaria, whereas the copepod Mixodiaptomus laciniatus was 13C depleted relative to particulate organic matter, indicating a selective feeding on an isotopically lighter source, likely phytoplankton. The results obtained show that, despite contrasting catchments, the food web of both lakes might be partially supported by terrestrial carbon for which utilization is species specific.

scholarly journals Food Web Topology in High Mountain Lakes

PLoS ONE ◽  
2015 ◽  
Vol 10 (11) ◽  
pp. e0143016 ◽  
Author(s):  
Javier Sánchez-Hernández ◽  
Fernando Cobo ◽  
Per-Arne Amundsen
Keyword(s):  
Food Web ◽  
Mountain Lakes ◽  
High Mountain ◽  
High Mountain Lakes

scholarly journals Nitrogen stable isotopes of ammonium and nitrate in high mountain lakes of the Pyrenees

2009 ◽  
Vol 6 (6) ◽  
pp. 11479-11499
Author(s):  
M. Bartrons ◽  
L. Camarero ◽  
J. Catalan
Keyword(s):  
Stable Isotopes ◽  
Food Web ◽  
Primary Energy ◽  
Mountain Lakes ◽  
High Mountain ◽  
Nitrogen Stable Isotopes ◽  
Deep Lakes ◽  
Primary Producers ◽  
High Mountain Lakes ◽  
Maximum Water

Abstract. Nitrogen stable isotopes (δ15N) are increasingly used to trace food web relationships and the flow of matter in lakes. However, there is high variability in δ15N among primary producers and other primary energy resources that can eventually propagate throughout the lake food web. To increase our understanding of the origin of this variability, we measured ammonium and nitrate δ15N in atmospheric deposition (AD), epilimnetic water (EW), deep chlorophyll maximum water (DCMW), and sediment porewater (SPW) in eight mountain lakes. A general δ15N (−3.4‰) for AD was estimated as the signature for AD ammonium and nitrate did not differ. All lakes showed similar high δ15N-NH4+ values for SPW (ca. 2.2‰). In contrast, the variability among lakes in water column values was high, although differences between EW and DCMW within a lake were low. δ15N-NO3- correlated with the altitude of the lakes, and its variability was interpreted as the influence of catchment nitrification, which is higher in talus landscapes. δ15N-NH4+ distribution had two modes, positive values (ca. 3‰) were associated to DCMW of shallow lakes, and probably reflect the SPW influence. Lower values (ca. −3‰) occur in EW and DCMW of deep lakes, and its variability was related to the degree that NO3- was up taken by primary producers and recycled within the food-web when NH4+ availability was low compared to demand. Overall, altitude, lake depth and seasonal cumulative primary production largely explain the patterns of δ15N variability observed in nitrogen dissolved compounds.

scholarly journals Food web bioaccumulation of organohalogenated compounds in high mountain lakes

Limnetica ◽  
2012 ◽  
pp. 155-164
Author(s):  
Bartrons, Mireia ◽  
Grimalt, Joan O. ◽  
Catalan, Jordi
Keyword(s):  
Food Web ◽  
Mountain Lakes ◽  
High Mountain ◽  
High Mountain Lakes

scholarly journals Responses of Benthic Macroinvertebrate Communities of Two Tropical, High-Mountain Lakes to Climate Change and Deacidification

Diversity ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 243
Author(s):  
Javier Alcocer ◽  
Luis A. Oseguera ◽  
Diana Ibarra-Morales ◽  
Elva Escobar ◽  
Lucero García-Cid
Keyword(s):  
Climate Change ◽  
Species Richness ◽  
Water Temperature ◽  
Water Level ◽  
Environmental Changes ◽  
Mountain Lakes ◽  
High Mountain ◽  
Macroinvertebrate Communities ◽  
High Mountain Lakes ◽  
La Luna

High-mountain lakes are among the most comparable ecosystems globally and recognized sentinels of global change. The present study pursued to identify how the benthic macroinvertebrates (BMI) communities of two tropical, high mountain lakes, El Sol and La Luna, Central Mexico, have been affected by global/regional environmental pressures. We compared the environmental characteristics and the BMI communities between 2000–2001 and 2017–2018. We identified three principal environmental changes (the air and water temperature increased, the lakes’ water level declined, and the pH augmented and became more variable), and four principal ecological changes in the BMI communities [a species richness reduction (7 to 4), a composition change, and a dominant species replacement all of them in Lake El Sol, a species richness increase (2 to 4) in Lake La Luna, and a drastic reduction in density (38% and 90%) and biomass (92%) in both lakes]. The air and water temperature increased 0.5 °C, and lakes water level declined 1.5 m, all suggesting an outcome of climate change. Contrarily to the expected acidification associated with acid precipitation, both lakes deacidified, and the annual pH fluctuation augmented. The causes of the deacidification and the deleterious impacts on the BMI communities remained to be identified.

scholarly journals Using a morpho-functional approach to assess phytoplankton dynamics in two adjacent high-mountain lakes: a 10-year survey

2014 ◽  
Vol 73 (3) ◽  
Author(s):  
Renata Trevisan ◽  
Marco Picarella ◽  
Frank B. Dazzo ◽  
Stefano Bona ◽  
Giuseppe Morabito ◽  
...  
Keyword(s):  
Functional Approach ◽  
Mountain Lakes ◽  
High Mountain ◽  
Phytoplankton Dynamics ◽  
High Mountain Lakes

scholarly journals Trapping of Organochlorine Compounds in High Mountain Lakes

2001 ◽  
Vol 1 ◽  
pp. 609-611 ◽  
Author(s):  
Joan O. Grimalt ◽  
Pilar Fernandez ◽  
Rosa M. Vilanova
Keyword(s):  
Atmospheric Transport ◽  
Mountain Lakes ◽  
Organochlorine Compounds ◽  
High Mountain ◽  
High Latitudes ◽  
High Mountain Lakes ◽  
Mountain Areas ◽  
Persistent Pollutants

High mountain areas have recently been observed to be polluted by organochlorine compounds (OC) despite their isolation. These persistent pollutants arrive at these remote regions through atmospheric transport. However, the mechanisms involving the accumulation of these compounds from the atmospheric pool to the lacustrine systems still need to be elucidated. These mechanisms must be related to the processes involving the transfer of these pollutant from low to high latitudes[1] as described in the global distillation effect[2].

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