Distribution of Macroinvertebrate assemblages along a saline wetland in harsh environmental conditions from Central-West Argentina

Scheibler, Érica Elizabeth; Ciocco, Néstor Fernando

doi:10.1016/j.limno.2010.03.001

Cited by 18 publications

(20 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nevertheless, chiro nomids have be come adapted to these kinds of habitats (Lencioni & Rossaro 2005) and are one of the macroinvertebrate families most capable of surviving in such extreme environments (Lods-Crozet et al 2001). In the Mendoza River basin, during the melting season (summer), stressful environmental conditions caused by increments in suspended solids (Scheibler 2007) and river discharge (present study) were associated with low chironomid density. Our results confirm a negative correlation between discharge and chironomid density in summer.…”

Section: Prevalence Of Chironomids and Environmental Variablesmentioning

confidence: 55%

“…Indeed, species richness in arid regions has been found to be notably low relative to areas with higher precipitation (Wright & Burgin 2010). Similar research on different aquatic environments in the Mendoza province has also reported low taxonomic richness (Scheibler 2007, Scheibler & Debandi 2008, Scheibler & Ciocco 2011.…”

Section: Prevalence Of Chironomids and Environmental Variablesmentioning

confidence: 75%

See 1 more Smart Citation

Chironomid (Insecta: Diptera) assemblages along an Andean altitudinal gradient

Scheibler¹,

Roig‐Juñent²,

Claps³

2014

Aquat. Biol.

View full text Add to dashboard Cite

Chironomidae are an abundant, diverse and ecologically important group common in mountain streams worldwide, but their patterns of distribution have been poorly described for the Andes region in western-central Argentina. Here we examine chironomid assemblages along an altitudinal gradient in the Mendoza River basin to study how spatial and seasonal variations affect the abundance patterns of genera across a gradient of elevation, assess the effects of environmental variables on the chironomid community and to describe its diversity using rarefaction and Shannon's indices. Three replicate samples and physicochemical parameters were measured seasonally at 11 sites in 2000 and 2001. Twelve genera of chironomid larvae were identified, which belonged to 5 subfamilies. Chironomid composition changed from the headwaters to the outlet and was associated with changes in altitude, water temperature, substrate size and conductivity. We found a pronounced seasonal and spatial variation in the macroinvertebrate community and in physicochemical parameters. Environmental conditions such as elevated conductivity levels and increased river discharge occurring during the summer produced low chironomid density values at the sampling sites. The rarefaction index revealed that the sampling sites with highest richness were LU (middle section of the river) and PO (lower section). However, Shannon's diversity index indicated that LU had the lowest diversity as a consequence of the dominance of Cricotopus over the other genera found. We attribute the low diversity found in our aquatic system to the aridity of the sampling area, as has been demonstrated in studies of other similar lotic systems in this mountain region.

show abstract

Section: Prevalence Of Chironomids and Environmental Variablesmentioning

confidence: 55%

Section: Prevalence Of Chironomids and Environmental Variablesmentioning

confidence: 75%

Chironomid (Insecta: Diptera) assemblages along an Andean altitudinal gradient

Scheibler¹,

Roig‐Juñent²,

Claps³

2014

Aquat. Biol.

View full text Add to dashboard Cite

show abstract

“…The influence of macrophytes on the composition and abundance of macroinvertebrate taxa is well known, since macrophytes contribute significantly to the habitat diversity (WIBERG-LARSEN et al, 2000;ROSI-MARSHALL and WALLACE, 2002). More specifically, macrophytes influence hydraulic roughness, water depth, flow velocity, and reduce predation, provide food and refuge and generate oxygenated environments (MILIŠA et al, 2006a;GOLUBIĆ et al, 2008;BAZZANTI et al, 2010;SCHEIBLER and CIOCCO, 2011). Water course size and slope gradient along streams have been shown to be good predictors of the distribution of caddis larvae and other macroinvertebrate assemblages (WIBERG-LARSEN et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Tufa Barriers from a Caddisfly's Point of View: Streams or Lake Outlets?

Šemnički¹,

Previšić

Ivković

et al. 2012

International Review of Hydrobiology

View full text Add to dashboard Cite

The caddisfly community composition in different microhabitats at tufa barriers was studied in the Plitvice Lakes NP, Croatia. Three tufa barriers were investigated and six emergence traps were installed at each site covering various microhabitats. Sampling was conducted monthly during the year 2008. Tufa barriers are lake outlet habitats, but they feature a variety of microhabitats similar to streams, which is reflected in the composition of caddisfly communities regarding longitudinal distribution preferences. The caddisfly communities at all three sites were dominated by species typical for the rhithral zone, but there was a shift in species composition along a longitudinal gradient, from the epirhithral to the metarhithral zone. Analysis of functional feeding guilds showed considerable differences between the caddisfly community at the Labudovac barrier and both downstream barriers, shifting from one with a quite diverse composition, to one completely dominated by passive filter-feeders. Passive filter feeders were not represented by the same taxa at up-and downstream barriers (i.e., by Hydropsyche species and Wormaldia species, at the Labudovac barrier and at both downstream barriers, respectively). Due to high complexity and habitat diversity, the highest diversity and equitability of caddisfly communities were recorded at microhabitats with particulate tufa and medium current velocity (10-20 cm/s). The lowest diversity and species richness were recorded for silt with low current velocity (0-10 cm/s). Abundance of caddisflies was positively correlated with current velocity due to a very high proportion of rheophilic passive filter feeders in the communities. However, community composition and structure is only to some degree influenced by microhabitat characteristics, but rather by their general position within the barrage-lake system, i.e., longitudinal distribution and thereby availability of different food resources. www.revhydro.comwith water from the Matica stream formed by merging of the streams Crna Rijeka and Bijela Rijeka in the upper section (Fig. 1). According to the Koppens climate classification, this area is influenced by temperate and continental climates. Most of the area is covered by forest consisting of Fagus sylvatica and Abies alba.The chosen study sites were located on three tufa barriers: Labudovac barrier (BL), Kozjak-Milanovac barrier (BKM) and Novakovića Brod barrier (BNB) (Fig. 1). Regarding general habitat characteristics, the uppermost Labudovac barrier differs from the two downstream barriers, mainly in its size (it covers a considerably larger area), substrate composition (there is no silt at BL, Table 1), annual water temperature and oxygen saturation range (the minimum and maximum water temperatures are slightly lower at BL than at BKM and BNB, and oxygen saturation values have a higher range at BL than at the two downstream barriers; IVKOVIĆ et al., 2012). Sampling and Laboratory MethodsCaddisflies were collected monthly during 2008 (Jan-Dec 2008) using six pyramid-type eme...

show abstract

“…In the springs, the values of the diversity index were similar over the seasons, thus reflecting the more stable environmental conditions of these aquatic systems with respect to the saline lake during the year. A diminution in the number of species in those aquatic communities linked to high salinity had been noted by Peralta and Fuentes (2005) and Scheibler and Ciocco (2011) in their investigations performed exclusively at the Carilauquen spring. These last authors also included data on the hydrologic variability as a negative influence on the zoobenthic assemblages that they analyzed.…”

Section: The Zooplankton Communitymentioning

confidence: 58%

“…As stated above, the principal water source for the lake (and indeed for the entire basin) is from snowmelt during the spring, and mainly via the Malargüe River. The water of the springs and lake contains principally calcium sulfate and sodium chloride (Ostera and Dapeña 2003;Peralta and Fuentes 2005;Scheibler and Ciocco 2011). The high temperatures and scarce rainfall produce salt flats in the shallowest sections of the lake and on the southern and southeastern sides.…”

Section: Sampling Sitesmentioning

confidence: 99%

Zooplankton diversity of a protected and vulnerable wetland system in southern South America (Llancanelo area, Argentina)

2016

View full text Add to dashboard Cite

In arid regions, climatic conditions exert a great control on the aquatic systems present, but recent changes in climate have produced an enhanced salinization of the aquatic environments located there. Consequently, a major reduction in biodiversity would be expected in those wetlands that were originally fresh water. Salinity is a principal cause of reduced biodiversity particularly in zooplankton because few of those species can adapt to the salt pressure of saline environments. Therefore, the aim of this study was to gain essential information on the diversity of aquatic invertebrates in Llancanelo basin by focussing the analysis on the zooplankton community and exploring seasonal and spatial differences in the zooplankton assemblages of this vulnerable wetland system within an arid region of Argentina. Seasonal samples were taken at nine sites in the basin (a shallow lake, 4 springs, streams, and the Malargüe River). A total of 45 species were identified. The zooplankton abundance in the lake displayed a clear seasonal contrast and was higher than that recorded in the springs and lotic environments. Boeckella poopoensis, Fabrea salina, and Brachionus plicatilis predominated in the lake, indicating their halophilia. The presence of the crustaceans Alona sp., Macrocyclops albidus, and Paracyclops fimbriatus was restricted to the springs; whereas Notholca labis and Notholca squamula were found only in running water. The zooplankton species richness in the Llancanelo area is low because of both the salt content in the lake and the irregularity of freshwater entry in all locations during the annual cycle.

show abstract

Distribution of Macroinvertebrate assemblages along a saline wetland in harsh environmental conditions from Central-West Argentina

Cited by 18 publications

References 35 publications

Chironomid (Insecta: Diptera) assemblages along an Andean altitudinal gradient

Chironomid (Insecta: Diptera) assemblages along an Andean altitudinal gradient

Tufa Barriers from a Caddisfly's Point of View: Streams or Lake Outlets?

Zooplankton diversity of a protected and vulnerable wetland system in southern South America (Llancanelo area, Argentina)

Contact Info

Product

Resources

About