Seasonal and diel periodicity of the drift of pupal exuviae of chironomid (Diptera) in the Mundo River (S. E. Spain)

Ubero-Pascal, Nicolás; Torralva, Mar; Oliva‐Paterna, Francisco J.; Malo, J.

doi:10.1127/archiv-hydrobiol/147/1999/161

Cited by 5 publications

(3 citation statements)

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“…Flow conditions are normally associated with taxa more sensitive to organic contamination (Coimbra et al, 1996;Prenda & Gallardo-Mayenco, 1996;Prenda & Gallardo-Mayenco, 1999;Ubero-Pascal et al, 2000). In contrast, under lentic conditions, these taxa tend to decrease and tolerant taxa become dominant in the community (Coimbra et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…During the flow period, precipitation may originate floods which cause disturbances, varying from small movements of substrate, to large changes in the system structure and in the morphology of the stream channel, such as detritus exportation, sediment deposition and the dislodging of biological communities (Boulton & Suter, 1986;Resh et al, 1988;Townsend, 1989;Stanley et al, 1994;Lake et al, 1998;Meyer & Meyer, 2000). The effect of these hydrological events is one of the principal environmental factors influencing the structure and function of macroinvertebrate communities in Mediterranean streams (Langton & Casas, 1998;Prenda & Gallardo-Mayenco, 1996;Prenda & Gallardo-Mayenco, 1999;Puig et al, 1991;Ubero-Pascal et al, 2000). Another characteristic of these systems is the rapid capacity to recover following these natural disturbances (Boulton et al, 1988;Closs & Lake, 1994;Doeg et al, 1989;Grimm & Fisher, 1989).…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Temporary Streams: The Robustness of Metric and Multimetric Indices under Different Hydrological Conditions

Morais

Pinto

Guilherme

et al. 2004

Integrated Assessment of Running Waters in Europe

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The generalization of ecological results from temporary streams needs the study of those ecosystems across a broad scale of running waters, covering the geographical ecological constraints involved (e.g., precipitation, temperature and geology). For the particular situation of Mediterranean streams in Southern Europe, high changes in water level, with unpredicting flood events, represent an important factor determining the structure and function of Mediterranean streams. This variability, inducing accentuated changes in the macroinvertebrate community, tends to influence the assessment methodologies. A set of metrics commonly used in Europe to assess organic degradation (Shannon-Wiener index, evenness, richness, BBI, IBE, BMWP , ASPT , DSFI, EPT, number of Trichoptera families, percentage of Gasteropoda, Oligochaeta and Diptera) and a multimetric index (IM9) developed to assess organic degradation in southern siliceous Portuguese basins were tested to evaluate quality at two contrasting sites (one unimpaired and another impaired by an identified point source of pollution). The multimetric index (IM9) composed by: ASPT (average score per taxon); GOLD (one minus percentage of Gasteropoda, Oligochaeta and Diptera); and TRICF (number of Trichoptera families), was the most suitable assessment methodology. IM9 presented a quite stable temporal pattern from February in late winter until June in early summer, even under the effect of episodic floods. A stepwise regression showed that most of tested metrics were significantly related to environmental variables (soluble reactive phosphorous, dissolved inorganic nitrogen and dissolved oxygen). Only richness, IBE and BMWP were not significantly influenced by environmental variables. Future research must be done covering the complete gradient of organic degradation, including the extension of multimetric assessment methodologies to temporary streams located in other regions under different geological and climatic conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessment of Temporary Streams: The Robustness of Metric and Multimetric Indices under Different Hydrological Conditions

Morais

Pinto

Guilherme

et al. 2004

Integrated Assessment of Running Waters in Europe

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show abstract

“…High drift densities were observed in very contrasting ecosystems like kryal and rithral alpine streams, were maximum densities were at 153 individuals m −3 , of which up to 93% were chironomids (Hieber, Robinson, & Uehlinger, ) and 550 m −3 in the flood plain of the Sacramento river (Benigno & Sommer, ). Most commonly measured drift densities are lower than 1 m −3 and approach the mean observed density of the Sinos River with 0.3 m −3 (Anderwald, Konar, & Humpesch, , Danube River, Austria; Ubero‐Pascal, Torralva, Oliva, & Malo, , Mundo River, Spain). In many lotic environments, chironomids are the dominant taxa: in regulated New Zealand streams (Tonkin, Death, & Joy, ), Hieber et al () in alpine streams, Rincón and Lobón‐Cerviá () in the Rio Negro, Spain.…”

Section: Discussionmentioning

confidence: 90%

Drift and emergence patterns of nonbiting midges (Chironomidae, Diptera, Insecta) in a subtropical river

Schulz

Rosa

Klein‐Stolz³

2019

Ecological Research

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The passive dispersal of macroinvertebrates suspended in the water column is known as drift. In tropical and subtropical rivers, which show a distinct hydrological cycle with defined flood and dry periods, chironomids may use flood periods for effective downstream dispersal, particularly if drift coincides with emergence, due to lower fish predator efficiency because of increased turbidity and turbulence. If this is true, chironomids should display a seasonal drift and emergence pattern. The abundances in drift of pupae, their exuviae and imagines (PEI) should be higher during the flood periods. Additionally, in response to predator pressure, it should be advantageous to drift, emerge, or both, to take place at night. We investigated drift and emergence patterns of chironomids in the subtropical Sinos River in southern Brazil during two annual cycles in monthly collections with sampling intervals of 3 hr during 24 hr. About 70% percent of all drifting macroinvertebrates were chironomids. Larvae showed a tendency to increase drift with higher stream flow. No relation of larval drift with the day or night period was detected. However, PEI drifted and emerged at significantly higher abundances during increased discharges. This pattern was not related to the period. During high flow, turbidity and turbulence increase. Hence, emergence efficiency may increase by higher survival rates under these conditions, due to reduced predation by visually oriented fish.

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Responses of Chironomid larvae (insecta, Diptera) to ecological quality in Mediterranean river mesohabitats (South Italy)

Marziali

Armanini

Cazzola

et al. 2009

River Research & Apps

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Chironomid larvae and pupae were studied in selected Mediterranean rivers with the aim of identifying pool and riffle taxa assemblages and of analysing their response to ecological quality gradients. Macroinvertebrate samples were collected in six Italian rivers along a pool-riffle sequence in three seasons following a multihabitat sampling technique. Chironomids were identified as genus/species, other macroinvertebrates as family/genus. The main physico-chemical, hydromorphological and geographical data were collected. Samples were ascribed to five quality classes according to the STAR_ICM index. Based on Chironomid taxa, principal component analysis (PCA) axis 1 represented an organic pollution gradient, axis 2 represented seasonality. Pool and riffle samples were significantly different according to taxa assemblages. Similar results were obtained with PCA based on the whole macrobenthic community. Indicator value (IndVal) analysis facilitated the detection of the Chironomid indicators of high/good quality pools (e.g. Conchapelopia pallidula, Rheopelopia ornata, Epoicocladius ephemerae) and riffles (Tvetenia calvescens, Eukiefferiella gracei). The Berger-Parker dominance index based on Chironomid assemblages in pools was correlated to PCA axis 1 and performed well in discriminating between quality classes. In riffles, no correlations to PCA axes were detected and a wide overlap between quality classes was present. Thus, assessment in the analysed river type may focus on pool mesohabitat as this seems to represent best the ecological gradient of sites.

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Seasonal and diel periodicity of the drift of pupal exuviae of chironomid (Diptera) in the Mundo River (S. E. Spain)

Cited by 5 publications

References 0 publications

Assessment of Temporary Streams: The Robustness of Metric and Multimetric Indices under Different Hydrological Conditions

Assessment of Temporary Streams: The Robustness of Metric and Multimetric Indices under Different Hydrological Conditions

Drift and emergence patterns of nonbiting midges (Chironomidae, Diptera, Insecta) in a subtropical river

Responses of Chironomid larvae (insecta, Diptera) to ecological quality in Mediterranean river mesohabitats (South Italy)

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