scholarly journals First report of inventory and role of macroinvertebrates and fish in Cautín river (38° S, Araucania region Chile)

2020 ◽  
Vol 80 (1) ◽  
pp. 215-228 ◽  
Author(s):  
R. Vega ◽  
P. De los Ríos ◽  
F. Encina ◽  
J. A. Norambuena ◽  
J. Barile ◽  
...  
Keyword(s):  
Ecological Role ◽  
Snow Melting ◽  
Introduced Fish ◽  
Human Interference ◽  
Inland Water ◽  
Larval Stages ◽  
Freshwater Crabs ◽  
Mixed Regime ◽  
Native Fishes

Abstract The Cautin river is located in the 137 years old Araucania region, Chile (38°S), and is characterized by alterations through human interference due agriculture and towns in its surrounding basin, the presence of salmonids, and by its mixed regime, originated from snow melting in summer and rains in winter. The aim of the present study was to make a review of the inventory and ecological role of the benthic inland water macroinvertebrates of the River Cautin, in order to understand their importance in the ecosystem of the river. The fauna of this river includes a fauna composed of endemic and introduced fish, which has, however, been only poorly studied until now. The literature revealed the presence of abundant populations of Diptera, Trichoptera and Ephemeroptera larval stages, and few crustaceans specifically amphipods and freshwater crabs along the river’s course. Many of these macroinvertebrates are prey for both introduced salmonids and native fishes. Similar results have been reported for other southern Argentinean and Chilean Patagonian rivers.

Ecology of benthic crustaceans in the Cautin river (38°S, Araucania region, Chile)

Crustaceana ◽  
2017 ◽  
Vol 90 (6) ◽  
pp. 709-719 ◽  
Author(s):  
Rolando Vega ◽  
Patricio De los Ríos-Escalante ◽  
Francisco Encina ◽  
Alfonso Mardones
Keyword(s):  
Aquatic Insects ◽  
Ecological Role ◽  
Invertebrate Fauna ◽  
Widespread Species ◽  
Melting Snow ◽  
Human Interference ◽  
Freshwater Crabs ◽  
Mixed Regime ◽  
Native Fishes

The Cautin river is located in the Araucania region, Chile (38°S), and is characterized by alterations through human interference in its surrounding basin, by the presence of introduced salmonids, and by its mixed regime, which originates from melting snow in summer and rains in winter. The fauna of this river includes an invertebrate fauna composed of both endemic and widespread species, which has, however, been only poorly studied until now. The aim of the present study was to make a review of the ecological role of the benthic inland water crustaceans of the River Cautin, in order to understand their importance in the ecosystem of the river. The literature revealed the presence of abundant populations of amphipods and freshwater crabs as well as of aquatic insects along the river’s course. Many of these crustaceans are prey for both introduced salmonids and native fishes. Similar results have been reported for other southern Argentinean and Chilean Patagonian rivers.

First report the role of benthic macroinvertebrates as preys for native fish in Toltén river (38° S, Araucania region Chile)

2020 ◽  
Author(s):  
J. Barile ◽  
R. Vega ◽  
P. De los Ríos-Escalante
Keyword(s):  
Benthic Macroinvertebrates ◽  
Native Species ◽  
Native Fish ◽  
Ecological Role ◽  
Main Prey ◽  
Human Interference ◽  
Chilean Patagonia ◽  
Chironomidae Larvae ◽  
Native Fishes

Abstract The Toltén river is located in the 137 years old Araucania region, Chile (38° S), and is characterized by low alterations through human interference due agriculture and towns in its surrounding basin, the presence of native fishes and salmonids, and by its lake effluent regime originated from Villarrica lake. The aim of the present study was to make a review of ecological role of the benthic inland water macroinvertebrates as preys for native fishes of the River Toltén, in order to understand their importance in the ecosystem of the river. The literature revealed that the main prey for native fishes are Chironomidae larvae, nevertheless there are not specific reports for Tolten river. The exposed results are similar with similar native species for Patagonia, and these native species would have prey for introduced salmonids, or these species would have prey competition with introduced salmonids in according to the literature descriptions for Argentinean and Chilean Patagonia.

Ecological role of benthic crustaceans in Chilean north Patagonian lakes and rivers (Araucania region, 39°S)

Crustaceana ◽  
2017 ◽  
Vol 90 (4) ◽  
pp. 437-447 ◽  
Author(s):  
Francisco Encina ◽  
Rolando Vega ◽  
Gladys Lara ◽  
Patricio De Los Ríos-Escalante
Keyword(s):  
Native Vegetation ◽  
Ecological Role ◽  
Aquatic Communities ◽  
Drainage Basins ◽  
Freshwater Crabs ◽  
Patagonian Lakes ◽  
Habitat Damage ◽  
Industrial Zones ◽  
Mineral Concentrations

The Chilean north Patagonian inland waters are characterized by their low mineral concentrations. In their original status, many of these ecosystems have native vegetation in their surrounding drainage basins, but in the last decades the native vegetation was replaced by agricultural, urban, and industrial zones, with as a result of these human alterations that those aquatic communities changed. The aim of the present study was to make a literature review about the ecological role of crustaceans in Chilean north Patagonian lakes and rivers. The literature mentioned the presence of amphipods (Hyalella), crayfishes (Samastacus spinifrons), and freshwater crabs (genusAegla), and many of these species hold a conservation risk due to the consequences of habitat damage and/or their high endemism. These crustaceans are important for the degradation of particulate organic matter originating from the surrounding vegetation, and are prey for native and introduced salmonid fishes. Similar patterns had already been observed for Argentinean Patagonian rivers.

Ecological Role of Exopolysaccharides of Bacillariophyta: A Review

2017 ◽  
Vol 19 (1) ◽  
pp. 5-24 ◽  
Author(s):  
E. I. Shnyukova ◽  
E. K. Zolotareva
Keyword(s):  
Ecological Role

An inter-dependence of flood and drought: disentangling amphibian beta diversity in seasonal floodplains

2017 ◽  
Vol 68 (11) ◽  
pp. 2115 ◽  
Author(s):  
Leonardo F. B. Moreira ◽  
Tainá F. Dorado-Rodrigues ◽  
Vanda L. Ferreira ◽  
Christine Strüssmann
Keyword(s):  
Community Structure ◽  
Environmental Factors ◽  
Quantitative Data ◽  
Explanatory Variable ◽  
Biotic Interactions ◽  
Ecological Role ◽  
Β Diversity ◽  
Amphibian Community ◽  
Dry Seasons

Species composition in floodplains is often affected by different structuring factors. Although floods play a key ecological role, habitat selection in the dry periods may blur patterns of biodiversity distribution. Here, we employed a partitioning framework to investigate the contribution of turnover and nestedness to β-diversity patterns in non-arboreal amphibians from southern Pantanal ecoregion. We investigated whether components of β-diversity change by spatial and environmental factors. We sampled grasslands and dense arboreal savannas distributed in 12 sampling sites across rainy and dry seasons, and analysed species dissimilarities using quantitative data. In the savannas, both turnover and nestedness contributed similarly to β diversity. However, we found that β diversity is driven essentially by turnover, in the grasslands. In the rainy season, balanced variation in abundance was more related to altitude and factors that induce spatial patterns, whereas dissimilarities were not related to any explanatory variable during dry season. In the Pantanal ecoregion, amphibian assemblages are influenced by a variety of seasonal constraints on terrestrial movements and biotic interactions. Our findings highlighted the role of guild-specific patterns and indicated that mass effects are important mechanisms creating amphibian community structure in the Pantanal.

Erratum: FeAs2 biomineralization on encrusted bacteria in hot springs: an ecological role of symbiotic bacteria

2004 ◽  
Vol 41 (4) ◽  
pp. 481
Author(s):  
Kazue Tazaki ◽  
Islam ABM Rafiqul ◽  
Kaori Nagai ◽  
Takayuki Kurihara
Keyword(s):  
Hot Springs ◽  
Symbiotic Bacteria ◽  
Ecological Role
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