Chaoborus flavicans (Díptera) is an oxy-regulator

Jäger, Ines; Walz, Norbert

doi:10.1127/archiv-hydrobiol/155/2002/401

Cited by 21 publications

(14 citation statements)

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“…Subfossil Chaoborus remains have been used in palaeolimnological research as indicators of predator-prey interactions, e.g., changes in fish (Johnson et al, 1990;Uutala, 1990;Uutala & Smol, 1996;Sweetman & Smol, 2006) or zooplankton (Sarmaja-Korjonen, 2002;Nevalainen, 2004) populations. They have also been used as indicators of climate change (Ilyashuk et al, 2005) and eutrophication due to their ability to tolerate reduced hypolimnetic oxygen conditions (Hongve, 1975;Scholz & ZerbstBoroffka, 1998;Jager & Walz, 2002;Hynynen et al, 2004). The examination of Chaoborus mandibles has often been included in subfossil chironomid and cladoceran studies (e.g., Sarmaja-Korjonen, 2002;Heiri & Lotter, 2003;Heiri, 2004;Ilyashuk et al, 2005;Sarmaja-Korjonen et al, 2006) because they can be identified and counted using both analyses.…”

Section: Introductionmentioning

confidence: 98%

Larval chaoborid mandibles in surface sediments of small shallow lakes in Finland: implications for palaeolimnology

Luoto

Nevalainen

2009

Hydrobiologia

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The aim of this study was to assess the value of phantom midge Chaoborus (Diptera: Chaoboridae) larvae as a palaeoenvironmental proxy in northern Europe. The presence of Chaoborus was examined in 80 small shallow lakes across Finland (60-70°N), based on their subfossil mandibles preserved in lake sediments. Chaoborus flavicans was present in 33 lakes, but was the most abundant midge taxon in only one of the lakes. Chaoborus crystallinus/obscurripes mandibles were present in two lakes. Statistical analyses showed that the distribution of Chaoborus was significantly correlated with lake depth and mean July air temperature. Chaoborus was absent in the northern study lakes, whereas the results indicated that C. flavicans was frequently found in small shallow lakes in southern Finland. Chaoborus flavicans was particularly abundant in fish-free, macrophyte-rich, dystrophic lakes, but absent in oligotrophic clear-water lakes having fish. The results of this study indicate that the subfossil mandibles of Chaoborus can provide valuable information in multiproxy palaeolimnological studies, especially when investigating past changes in water level and temperature in small shallow lakes in northern Europe.

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Section: Introductionmentioning

confidence: 98%

Larval chaoborid mandibles in surface sediments of small shallow lakes in Finland: implications for palaeolimnology

Luoto

Nevalainen

2009

Hydrobiologia

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“…They are voracious predators of other benthic invertebrates, especially zooplankton, and can be found in sediment during the day and in the column of water at night (Hare and Carter, 1986;Hare, 1995). The preference of these organisms for environments with low oxygen concentration and deeper zones of lakes and reservoirs is well documented (Larow, 1970;Strixino, 1973;Strixino and Strixino, 1980;Rahel and Nutzman, 1994;Rabette and Lair, 1998;Corbi and Trivinho-Strixino, 2002;Jager and Walz, 2002).…”

Section: Discussionmentioning

confidence: 99%

Does water level affect benthic macro-invertebrates of a marginal lake in a tropical river-reservoir transition zone?

Zerlin¹,

Henry²

2014

Braz. J. Biol.

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Benthic macro-invertebrates are important components of freshwater ecosystems which are involved in ecological processes such as energy transfer between detritus and consumers and organic matter recycling. The aim of this work was to investigate the variation in organism richness, diversity and density of benthic fauna during the annual cycle in Camargo Lake, a lake marginal to Paranapanema River, southeast Brazil. The correlation of environmental factors with community attributes of the macro-benthic fauna was assessed. Since Camargo Lake is connected to the river, we tested the hypothesis that water level variation is the main regulating factor of environmental variables and of the composition and abundance of benthic macro-invertebrates. The results indicated that lake depth varied with rainfall, being the highest at the end of the rising water period and the lowest at the beginning of this period. The sediment granulometry was more heterogeneous at the bottom of the lake by the end of the high water period. The benthic macro-invertebrate fauna was composed by 15 taxa. The Diptera order was represented by seven taxa and had greater richness in relation to other taxa. This group was responsible for 60% of the total abundance of organisms, followed by Ephemeroptera (22%) and Anellida (16%). Significant differences were observed over time in total richness and, in density of Narapa bonettoi, Chaoborus, Ablabesmyia gr. annulata, Chironomus gigas, Larsia fittkau, and Procladius sp. 2. Total taxa richness correlated negatively with water pH, transparency, conductivity, and bottom water oxygen. Higher positive correlations were found between the densities of some taxa and bottom water oxygen, conductivity and very fine sand, silt + clay of sediment, while negative correlations were recorded with organic matter, and fine, medium and coarse sand, bottom water temperature, mean temperature and rainfall. The significant temporal difference in water level was associated with changes in abiotic factors and macro-invertebrate community attributes.Keywords: marginal lake, connectivity, water level, benthic fauna.O nível de água afeta os macro-invertebrados bentônicos de uma lagoa marginal na região de transição rio -represa de zona tropical? ResumoOs macro-invertebrados são componentes importantes de ecossistemas aquáticas continentais, envolvidos em processos ecológicos como transferência de energia entre detritos e consumidores e, reciclagem de matéria orgânica. O objetivo deste trabalho foi investigar a variação na riqueza de organismos, diversidade e densidade da fauna bentônica durante um ciclo anual na Lagoa do Camargo, marginal ao Rio Paranapanema, sudeste do Brasil. Eventuais relações de fatores ambientais com atributos da comunidade macro-bentônica foram verificadas. Visto que a Lagoa do Camargo é conectada com o rio, nós testamos a hipótese de que a variação do nível de água é o principal fator regulador das variáveis ambientais e da composição e abundância dos macro-invertebrados bênticos. Os resultados i...

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“…Phantom midge (Chaoboridae) larvae are insensitive to oxygen deficits in water and sediments, and are present in the profundal zone of this lake despite the oxygen depletion in summer (DiGiovanni 1996, Jäger andWalz 2002). The sporadic presence of chironomid instars and snails during spring and fall was closely connected with water mixing in these seasons and well-oxygenated water and sediments in the lake including those in the deepest part.…”

Section: Discussionmentioning

confidence: 99%

Functioning of the Lake Rusałka ecosystem in Poznań (western Poland)

Gołdyn

Podsiadłowski²,

Kowalczewska‐Madura

et al. 2010

Oceanological and Hydrobiological Studies

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Lake Rusałka is a shallow, artificial, strongly eutrophic reservoir. Thermal stratification is weak and comprises only about 8% of the bottom surface. In summer, the epilimnion is oversaturated with oxygen due to intensive phytoplankton growth (chlorophyll a up to 80.2 µg l -1 ), while conditions in the hypolimnion are anaerobic. The high concentration of ammonium nitrogen and low N:P ratio stimulated intense growth of cyanobacteria in the period from June to November. The domination of rotifers in the metazooplankton and low diversity and biomass of benthic macroinvertebrates was the cause of low top-down pressure of these Copyright© by Institute of Oceanography, University of Gdańsk, Poland 66organisms on the phytoplankton. The most advantageous restoration measures were identified to improve water quality and make the recreational use of the lake possible.

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Chaoborus flavicans (Díptera) is an oxy-regulator

Cited by 21 publications

References 0 publications

Larval chaoborid mandibles in surface sediments of small shallow lakes in Finland: implications for palaeolimnology

Larval chaoborid mandibles in surface sediments of small shallow lakes in Finland: implications for palaeolimnology

Does water level affect benthic macro-invertebrates of a marginal lake in a tropical river-reservoir transition zone?

Functioning of the Lake Rusałka ecosystem in Poznań (western Poland)

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