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Entomologmötet på Gotland 2017: temaexkursion med fokus på vattenlevande skalbaggar, skinnbaggar och trollsländor i Äskåkersvät.
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- Bergsten, Johannes, 1975- (author)
- Naturhistoriska riksmuseet,Enheten för zoologi,Bergsten Systematic Entomology Lab
- Göthberg, Anders (author)
- Johansson, Karolina (author)
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- Pettersson, Arne (author)
- Burkart, Werner (author)
- Burkart, Gudrun (author)
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- (creator_code:org_t)
- 2017
- 2017
- Swedish.
- In: Entomologisk Tidskrift. - 0013-886X. ; 139:1, s. 39-49
- Journal article (peer-reviewed)
Abstract
Subject headings
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- The yearly Swedish entomology meeting 2017 was organized by the local entomologysociety of Gotland, on the northern part of the Baltic island Gotland near Bunge, 4-6 August.One thematic excursion was focused on aquatic insects, especiallly aquatic beetles,bugs and dragonflies. A shallow pond, Äskåkersvät, with Characeae in an open grazedlandscape with high natural values was studied. Äskåkersvät lies just adjacent to the largerarea around lake Bästeträsk which is the focus of a pilot study evaluating its potential asa future national park. The pilot study is undertaken by Gotland County AdministrativeBoard, the Swedish Environmental Protection Agency, Region Gotland and the SwedishAgency for Marine and Water Management. Here we give an annotated report of the 103species found: 69 species of water beetles (out of which 34 were Dytiscidae), 20 speciesof aquatic or semiaquatic bugs (out of which 10 were Corixidae), and 14 species of dragonflies.These include Hydrophilus piceus and H. aterrimus redlisted in Sweden (both asNT), and Dytiscus latissimus, globally redlisted (VU). We also noted the noble crayfish,Astacus astacus (redlisted as CR in Sweden) and the European medicinal leech Hirudomedicinalis (redlisted as NT globally). The blue emperor dragonfly (Anax imperator) wasnoted, a species first recorded from Gotland in 2002 and we present a graph on its increaseand spreading on the island since. The number of species found in spite of a relativelymodest collecting effort at a suboptimal time when many species may be in pupal stage outof water as witnessed by many teneral individuals, indicates a species rich locality withhigh natural value. The stoneworts (Characeae) vegetation certainly contributes to this, forinstance vouched for by the occurrence of specialists as Haliplus confinis and H. obliquuswhose larvae feed on stoneworts.
Subject headings
- NATURVETENSKAP -- Biologi -- Biologisk systematik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biological Systematics (hsv//eng)
- NATURVETENSKAP -- Biologi -- Zoologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Zoology (hsv//eng)
Keyword
- Diversity of life
- Livets mångfald
Publication and Content Type
- ref (subject category)
- art (subject category)
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