The zoobenthic community of shallow salt pans in Austria – preliminary results on phenology and the impact of salinity on benthic invertebrates

Wolfram, Georg; Donabaum, Karl; Schagerl, Michael; Kowarc, Verena A.

doi:10.1023/a:1017014414599

Cited by 19 publications

(23 citation statements)

References 24 publications

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“…The emergence of chironomid larvae by the end of July may have led to seasonal differences in the relative abundances of several groups and subsequently, to changes in the CV values of the abundance based metrics. The potential influences of changes in the assemblages and phenology of plant communities related to the availability of substrate for epiphytes should also be acknowledge (Parsons & Matthews, 1995;Wolfram et al, 1999, de Szalay & Resh, 2000. In the present work, chironomid emergence along with the phenology of Myriophyllum stands (sparsely growing in August) may explain the observed differences between the quantitative and the sweep samples of the Myriophyllum associated fauna from August 2002 to May 2003.…”

Section: Temporal Variabilitymentioning

confidence: 69%

Among-habitat and Temporal Variability of Selected Macroinvertebrate Based Metrics in a Mediterranean Shallow Lake (NW Spain)

2006

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According to the European Water Framework Directive, waterbodies have to be classified on the basis of their ecological status using biological quality elements, such as macroinvertebrates. This needs to take into consideration the influence of natural variation (both spatial and temporal) of reference biological communities as this may obscure the effects caused by anthropogenic disturbance. We studied the influence of among-habitat and temporal (seasonal and interannual) changes on the macroinvertebrate communities of an Iberian shallow lake and the variability of 21 measures potentially useful for bioindication purposes. Two series of data were examined: (a) macroinvertebrate samples taken on four occasions over an annual cycle were used to assess the effects of seasonality and among-habitat variability; (b) macroinvertebrate samples collected in three consecutive summers were used to assess interannual variability. Coefficients of variation, expressed as percentage, were used to quantify the effect of among-habitat and temporal variability on the selected metrics. According to our results, % Insecta, Shannon-Wiener diversity index and the qualitative taxonomic metrics (measures based on number of taxa) were robust in terms of temporal (seasonal and interannual) and among-habitat variability. Abundance ratio and some metrics based on functional feeding groups were highly variable. Therefore, qualitative taxonomic metrics may be promising tools in biomonitoring programs of Mediterranean shallow lakes due to their comparatively low variability.

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Section: Temporal Variabilitymentioning

confidence: 69%

Among-habitat and Temporal Variability of Selected Macroinvertebrate Based Metrics in a Mediterranean Shallow Lake (NW Spain)

2006

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“…While single fish specimen may be introduced by birds from the close-by Lake Neusiedl, no fish population is expected to survive a full season in any of the investigated lakes due to the strong changes in salinity and occasional dry-out. On the other hand, Odonata larvae have been found in two consecutive years in Lake US [44]. Damselfly nymphs and salamander larvae may affect copepod pigmentation [22] and selective pressure on colored individuals in the ‘dark water’ lakes could additionally explain the almost complete lack of copepod pigmentation found in these ecosystems.…”

Section: Discussionmentioning

confidence: 99%

Copepods in Turbid Shallow Soda Lakes Accumulate Unexpected High Levels of Carotenoids

Schneider

Herzig²,

Koinig

et al. 2012

PLoS ONE

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Carotenoids are protective pigments present in many aquatic organisms that reduce the photooxidative stress induced by short-wavelenght solar radiation, yet increase their susceptibility to predators. Arctodiaptomus spinosus, a calanoid copepod typically found in many fishless shallow soda lakes, shows large between-lake differences in pigmentation. Here, we attribute these differences to the environmental state of these ecosystems, namely, ‘dark water’ lakes with submersed vegetation and turbid ‘white’ lakes lacking macrophytes. Copepod carotenoid concentration in the turbid ‘white’ lakes was significantly (about 20-fold) higher than in the ‘dark water’ ones, although the latter systems were characterized by higher transparency. In addition, males had on a dry weight basis around three times higher carotenoid concentrations than females. Mycosporine-like amino acids (direct UV screening substances) were found in all cases, but in low concentration. The environmental conditions in these ecosystems were largely shaped by the presence/absence of submersed macrophytes Thus, in the turbid lakes, the strong wind-driven mixis allows for copepods to be brought to the surface and being exposed to solar radiation, whereas in ‘dark water’ ones, macrophytes reduce water turbulence and additionally provide shelter. Our results explain the counter-intuitive notion of strong red pigmentation in copepods from a turbid ecosystem and suggest that factors other than high UV transparency favor carotenoid accumulation in zooplankton.

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“…4). Submerged macrophytes may be one reason why the invertebrate community in these ponds was more diverse, since they have a profound effect on community structure and provide a substrate for many macroinvertebrates (Wolfram et al 1999, Weatherhead & James 2001.…”

Section: Discussionmentioning

confidence: 99%

Temporal and spatial variation of an aquatic invertebrate community subjected to avian predation at the Odiel salt pans (SW Spain)

Sánchez¹,

Green²,

Castellanos³

2006

archiv_hydrobiologie

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We studied the temporal variation in abundance and distribution of invertebrates in the water column in both traditional and industrial salt pans in the Odiel marshes, south-west Spain, in 2001. We selected 12 ponds that were representative of different salinities and stages of salt production. Every two months, invertebrates were sampled within the 0 -20 cm depth range used by foraging waders. We identified 40 taxa, including 30 aquatic and eight terrestrial metazoan invertebrates. Aquatic invertebrate taxa richness and diversity decreased significantly with increasing pond salinity, whereas total biomass showed a non-significant increase. Overall, Artemia parthenogenetica constituted 67.6 % of invertebrates by number, and 95.5 % of the biomass. The copepod Cletocamptus retrogressus represented 31.1 % of invertebrates by number, and 0.6 % of the biomass. Invertebrate biomass and dominance of A. parthenogenetica was highest in September and lowest in November. There was significant spatial and temporal variation in abundance for all aquatic taxa, and for a given pond and month, the depth, distance to shoreline and fetch (wind effects) all had important partial effects on invertebrate distribution. Ordination methods showed a strong relationship between community structure and water chemistry (salinity, pH and redox potential), with the salinity gradient being the most important. There was a clear separation between low salinity ponds with fish and submerged macrophytes and other ponds. The more intensively managed industrial salines held lower densities and biomass of invertebrates than traditional salines, perhaps owing to greater protection from wind or greater inputs of detritus. The beetle Ochthebius corrugatus was abundant in the tradi-1  2006 E. Schweizerbart'sche Verlagsbuchhandlung, D-70176 Stuttgart 200 Marta I. Sánchez et al.tional ponds but absent from the industrial ones. The number of feeding waders using each pond was strongly correlated with the available biomass of invertebrates.

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The zoobenthic community of shallow salt pans in Austria – preliminary results on phenology and the impact of salinity on benthic invertebrates

Cited by 19 publications

References 24 publications

Among-habitat and Temporal Variability of Selected Macroinvertebrate Based Metrics in a Mediterranean Shallow Lake (NW Spain)

Among-habitat and Temporal Variability of Selected Macroinvertebrate Based Metrics in a Mediterranean Shallow Lake (NW Spain)

Copepods in Turbid Shallow Soda Lakes Accumulate Unexpected High Levels of Carotenoids

Temporal and spatial variation of an aquatic invertebrate community subjected to avian predation at the Odiel salt pans (SW Spain)

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