Population fluctuations of chironomid and simuliid Diptera at Myvatn in 1977–1996
Aquatic dipterans dominate the macrozoobenthos of Lake Myvatn and the River Laxá and are important in the food web. As benthic sampling is time-consuming and expensive, a window trap was developed in order to facilitate the monitoring of the zoobenthos resource. Four window traps were operated at My...
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| Veröffentlicht in: | Aquatic ecology 2004-01, Vol.38 (2), p.209-217 |
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| creator | Gardarsson, Arnthor Einarsson, Árni Gíslason, Gísli Már Hrafnsdóttir, Thóora R. Ingvason, Haraldur Jónsson, Erlendur Ólafsson, Jón S. |
| description | Aquatic dipterans dominate the macrozoobenthos of Lake Myvatn and the River Laxá and are important in the food web. As benthic sampling is time-consuming and expensive, a window trap was developed in order to facilitate the monitoring of the zoobenthos resource. Four window traps were operated at Myvatn and Laxá during 1977-1996. The results yielded population indices for about 20 species of chironomids and one simuliid. Numbers of the most abundant midge species showed close correlations between 2 trap sites on the lake shore, 5 km apart; Cricotopus tibialis did not show such synchrony. At the River Laxá, the dominant blackfly (Simulium vittatum) showed correlation between 2 trap sites, at the outlet and 3 km downstream; while the chironomids, apart from Micropsectra atrofasciata, did not. The dominant midge of Lake Myvatn, Tanytarsus gracilentus showed 3 cyclic oscillations during the 20-year period. The fluctuations were tracked by Micropsectra lindrothi, Procladius islandicus, Orthocladius consobrinus, Psectrocladius barbimanus and Chironomus islandicus. A group of non-cyclic species included Cricotopus sylvestris and Orthocladius oblidens. [PUBLICATION ABSTRACT] |
| doi_str_mv | 10.1023/B:AECO.0000032051.14118.e1 |
| format | Article |
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Ingvason, Haraldur ; Jónsson, Erlendur ; Ólafsson, Jón S.</creator><creatorcontrib>Gardarsson, Arnthor ; Einarsson, Árni ; Gíslason, Gísli Már ; Hrafnsdóttir, Thóora ; R. Ingvason, Haraldur ; Jónsson, Erlendur ; Ólafsson, Jón S.</creatorcontrib><description>Aquatic dipterans dominate the macrozoobenthos of Lake Myvatn and the River Laxá and are important in the food web. As benthic sampling is time-consuming and expensive, a window trap was developed in order to facilitate the monitoring of the zoobenthos resource. Four window traps were operated at Myvatn and Laxá during 1977-1996. The results yielded population indices for about 20 species of chironomids and one simuliid. Numbers of the most abundant midge species showed close correlations between 2 trap sites on the lake shore, 5 km apart; Cricotopus tibialis did not show such synchrony. At the River Laxá, the dominant blackfly (Simulium vittatum) showed correlation between 2 trap sites, at the outlet and 3 km downstream; while the chironomids, apart from Micropsectra atrofasciata, did not. The dominant midge of Lake Myvatn, Tanytarsus gracilentus showed 3 cyclic oscillations during the 20-year period. The fluctuations were tracked by Micropsectra lindrothi, Procladius islandicus, Orthocladius consobrinus, Psectrocladius barbimanus and Chironomus islandicus. A group of non-cyclic species included Cricotopus sylvestris and Orthocladius oblidens. 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Ingvason, Haraldur</creatorcontrib><creatorcontrib>Jónsson, Erlendur</creatorcontrib><creatorcontrib>Ólafsson, Jón S.</creatorcontrib><title>Population fluctuations of chironomid and simuliid Diptera at Myvatn in 1977–1996</title><title>Aquatic ecology</title><description>Aquatic dipterans dominate the macrozoobenthos of Lake Myvatn and the River Laxá and are important in the food web. As benthic sampling is time-consuming and expensive, a window trap was developed in order to facilitate the monitoring of the zoobenthos resource. Four window traps were operated at Myvatn and Laxá during 1977-1996. The results yielded population indices for about 20 species of chironomids and one simuliid. Numbers of the most abundant midge species showed close correlations between 2 trap sites on the lake shore, 5 km apart; Cricotopus tibialis did not show such synchrony. At the River Laxá, the dominant blackfly (Simulium vittatum) showed correlation between 2 trap sites, at the outlet and 3 km downstream; while the chironomids, apart from Micropsectra atrofasciata, did not. The dominant midge of Lake Myvatn, Tanytarsus gracilentus showed 3 cyclic oscillations during the 20-year period. The fluctuations were tracked by Micropsectra lindrothi, Procladius islandicus, Orthocladius consobrinus, Psectrocladius barbimanus and Chironomus islandicus. A group of non-cyclic species included Cricotopus sylvestris and Orthocladius oblidens. 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Numbers of the most abundant midge species showed close correlations between 2 trap sites on the lake shore, 5 km apart; Cricotopus tibialis did not show such synchrony. At the River Laxá, the dominant blackfly (Simulium vittatum) showed correlation between 2 trap sites, at the outlet and 3 km downstream; while the chironomids, apart from Micropsectra atrofasciata, did not. The dominant midge of Lake Myvatn, Tanytarsus gracilentus showed 3 cyclic oscillations during the 20-year period. The fluctuations were tracked by Micropsectra lindrothi, Procladius islandicus, Orthocladius consobrinus, Psectrocladius barbimanus and Chironomus islandicus. A group of non-cyclic species included Cricotopus sylvestris and Orthocladius oblidens. [PUBLICATION ABSTRACT]</abstract><cop>Dordrecht</cop><pub>Springer Nature B.V</pub><doi>10.1023/B:AECO.0000032051.14118.e1</doi><tpages>9</tpages></addata></record> |
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| identifier | ISSN: 1386-2588 |
| ispartof | Aquatic ecology, 2004-01, Vol.38 (2), p.209-217 |
| issn | 1386-2588 1573-5125 |
| language | eng |
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| source | SpringerLink Journals - AutoHoldings |
| subjects | Animal populations Chironomus Cricotopus sylvestris Cricotopus tibialis Diptera Fluctuations Freshwater Lake shores Lakes Micropsectra Orthocladius consobrinus Orthocladius oblidens Outlets Psectrocladius barbimanus Rivers Tanytarsus gracilentus Zoobenthos |
| title | Population fluctuations of chironomid and simuliid Diptera at Myvatn in 1977–1996 |
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