The emergence of &lt;i&gt;Halocladius variabilis&lt;/i&gt; (Staeger) (Diptera: Chironomidae) in the surroundings of the Tvärminne Biological Station in the northern Baltic Sea

Hirvenoja, Mauri; Palmén, Ernst; Hirvenoja, Elina

doi:10.33338/ef.84292

Cited by 4 publications

(5 citation statements)

References 2 publications

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“…were actually living in these sediments, but it is not the focus of this study as they cannot explain the link between the marine habitat and terrestrial birds. Another potential explanation for the lack of chironomids in the sediments would be that larval growth occurs later in the season, however, chironomids are known to have extended growing seasons with overlapping generation and are thus expected to be detected throughout the year 36 , and the emergence of adults in the Baltic Sea occurs in May and June 37 which means that larvae, if present in the habitat, would be detected in April.…”

Section: Discussionmentioning

confidence: 99%

Fueling of a marine-terrestrial ecosystem by a major seabird colony

Hentati‐Sundberg

Raymond

Sköld

et al. 2020

Sci Rep

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Seabirds redistribute nutrients between different ecosystem compartments and over vast geographical areas. This nutrient transfer may impact both local ecosystems on seabird breeding islands and regional biogeochemical cycling, but these processes are seldom considered in local conservation plans or biogeochemical models. The island of Stora Karlsö in the Baltic Sea hosts the largest concentration of piscivorous seabirds in the region, and also hosts a large colony of insectivorous House martins Delichon urbicum adjacent to the breeding seabirds. We show that a previously reported unusually high insectivore abundance was explained by large amounts of chironomids—highly enriched in δ15N—that feed on seabird residues as larvae along rocky shores to eventually emerge as flying adults. Benthic ammonium and phosphate fluxes were up to 163% and 153% higher close to the colony (1,300 m distance) than further away (2,700 m) and the estimated nutrient release from the seabirds at were in the same order of magnitude as the loads from the largest waste-water treatment plants in the region. The trophic cascade impacting insectivorous passerines and the substantial redistribution of nutrients suggest that seabird nutrient transfer should be increasingly considered in local conservation plans and regional nutrient cycling models.

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Section: Discussionmentioning

confidence: 99%

Fueling of a marine-terrestrial ecosystem by a major seabird colony

Hentati‐Sundberg

Raymond

Sköld

et al. 2020

Sci Rep

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“…The occurrence of H. variabilis larvae in the subtidal zone of the White Sea is unusual considering that the adult stage of the insect flies (e.g. Hirvenoja et al , 2006), and cannot survive immersion in seawater. The occurrence of subtidal larvae presents two difficulties.…”

Section: Discussionmentioning

confidence: 99%

“…Adults of H. variabilis have been found on sites other than the rocky intertidal zone. These include salt marshes (Giberson et al , 2001) and terrestrial habitats some distance from the seashore (Hirvenoja et al , 2006). There are also occasional findings of the larvae of H. variabilis in fresh water habitats in northern Europe (Kuz'mina, 2001).…”

Section: Discussionmentioning

confidence: 99%

“…This species has been extensively reported from the Holarctic of eastern and northern Canada to northern Europe and the Mediterranean and Black Seas (e.g. Hirvenoja, 1973Hirvenoja, , 1975Santhakumaran et al, 1984;Colbo, 1996;Garbary et al, 2005b;Hirvenoja et al, 2006). The species may be best known as a larval stage from eastern Canada where numerous collections of larvae suggest a commensal and possibly mutualistic symbiosis with marine intertidal algae, in particular Elachista fucicola (Velley) Areschoug (Garbary et al, 2005a(Garbary et al, , 2008.…”

Section: Introductionmentioning

confidence: 97%

“…In the northern Baltic Sea the adult phase is best known and numerous adults have been observed (e.g. Hirvenoja et al , 2006). These observations, along with Santhakumaran et al (1984) suggested much wider habitat utilization by Halocladius than was assumed by Neumann et al (1997) who placed larval habitat in the mid to high intertidal zones on rocky shores.…”

Section: Introductionmentioning

confidence: 99%

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Halocladius variabilis(Diptera: Chironomidae): a marine insect symbiotic with seaweeds from the White Sea, Russia

Tarakhovskaya

Garbary

2009

J. Mar. Biol. Ass.

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The commensal (and possibly mutualistic) symbiosis between the marine chironomid,Halocladius variabilis, and brown algal epiphytes ofFucus vesiculosusandAscophyllum nodosumis described for the first time from Europe, based on field studies from the White Sea, Russia. While the primary host,Elachista fucicola, and the secondary host,A. nodosum, are the same as in eastern Canada where the symbiosis was first described, White Sea populations have a wider range of primary hosts that includePylaiella littoralisandDictyosiphon foeniculaceus. About 64% ofE. fucicolathalli onA. nodosumin the low intertidal zone were colonized. Significantly lower frequencies were found onE. fucicolawhen the latter was epiphytic onF. vesiculosusat the same tidal height or on either secondary host when they were in the subtidal zone. For a given tidal height, or secondary host, frequency ofH. variabiliswas reduced onP. littoralisand further reduced onD. foeniculaceus. We suggest that subtidal populations are colonized by dispersal of larvae from the intertidal zone on to suitable substrata, and that there is limited potential for these individuals to reach the intertidal zone as adults for reproduction.

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The Arthropod Fauna of Oak (Quercus spp., Fagaceae) Canopies in Norway

Thunes

Søli

Thuróczy³

et al. 2021

Diversity

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(1) We document the invertebrate fauna collected from 24 oak canopies in east and west Norway as a contribution to the Norwegian Biodiversity Information Centre’s ‘The Norwegian Taxonomy Initiative’. (2) A snap-shot inventory of the canopies was recorded by means of emitting a mist of natural pyrethrum into the canopies at night using a petrol-driven fogger and collecting the specimens in butterfly nets spread on the ground under the canopy. (3) Almost the entire catch of more than 6800 specimens was identified to 722 species. Out of 92 species new to the Norwegian fauna, 21 were new to science and, additionally, 15 were new to the Nordic fauna. Diptera alone constituted nearly half of the species represented, with 61 new records (18 new species). Additionally, 24 Hymenoptera (one new species), six oribatid mites (two new species) and one Thysanoptera were new to the Norwegian fauna. (4) Our study emphasizes the importance of the oak tree as a habitat both for a specific fauna and occasional visitors, and it demonstrates that the canopy fogging technique is an efficient way to find the ‘hidden fauna’ of Norwegian forests. The low number of red listed species found reflects how poor the Norwegian insect fauna is still studied. Moreover, the implication of the IUCN red list criteria for newly described or newly observed species is discussed.

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The emergence of <i>Halocladius variabilis</i> (Staeger) (Diptera: Chironomidae) in the surroundings of the Tvärminne Biological Station in the northern Baltic Sea

Cited by 4 publications

References 2 publications

Fueling of a marine-terrestrial ecosystem by a major seabird colony

Fueling of a marine-terrestrial ecosystem by a major seabird colony

Halocladius variabilis(Diptera: Chironomidae): a marine insect symbiotic with seaweeds from the White Sea, Russia

The Arthropod Fauna of Oak (Quercus spp., Fagaceae) Canopies in Norway

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