| 51. |
- Jonsell, Mats
(författare)
-
Fyra dåligt kända skalbaggar i vedsvamp: våra rödlistade tickgnagare (sl. Dorcatoma, Ptinidae)
- 2013
-
Ingår i: Entomologisk tidskrift. - 0013-886X. ; 134, s. 173-180
-
Tidskriftsartikel (refereegranskat)abstract
- In the series of papers about poorly known beetles in Sweden, the turn has come to the four red-listed species of Dorcatoma. Three of them have been recorded from only one or a few sites: Dorcatoma janssoni Büche & Lundberg, 2002 is found on two areas in the province of Uppland, reared from wood decayed by the fungus Fomitopsis pinicola; D. minor Zahradnik, 1993 has been recorded from two sites at river Dalälven and from Småland (however only females which means that the identification is not 100% confirmed), having its larval development in fruiting bodies of Fomes fomentarius; D. ambjoerni Baranowski, 1985 is still only known from the type locality Hallands Väderö (Skåne, southernmost Sweden) in fruiting bodies of Inonotus. The fourth red-listed species D. substriata Hummel, 1829 is more frequent (127 records on the website ”Artportalen”) and is mainly reared from fungi of the genus Inonotus. Additional records of all four species can probably be made through directed search. The beetles are easily reared from dead or dying fruiting bodies of the host fungi collected during the cold season. Revision of material in collections could also reveal records of the recently described species. In addition to the mentioned species there are also three species known from neighbouring countries might be found in Sweden.
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| 52. |
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| 53. |
- Jonsell, Mats, et al.
(författare)
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Första fynden av barkborren Xyleborus dryographus (Ratzeburg, 1837) (Coleoptera: Curculionidae) i Sverige
- 2023
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 144, s. 21-28
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Tidskriftsartikel (refereegranskat)abstract
- In 2020 and 2021, the first findings in Sweden of Xyleborus dryographus (Ratzeburg, 1837) were made in the province of Blekinge in South-Eastern Sweden. In 2020, two specimens were caught in interception traps baited with pheromone, primarily placed out to catch Platypus cylindrus in oak stands. In 2021, two specimens were caught in a pitfall trap near oak logs placed out to support populations of Lucanus cervus. The distance between the most distant localities is 2,4 km. The findings indicate that X. dryographus is now establishedin Sweden. The number of known bark beetle species (Scolytinae) in Sweden is now 94.
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| 54. |
- Jonsell, Mats
(författare)
-
Gotska Sandöns skogshistoria med brandplan för framtiden
- 2015
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 136, s. 85-85
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Annan publikation (populärvet., debatt m.m.)abstract
- Recension av Niklasson, M. 2015. Skogshistoria och bränder på Gotska Sandön. – Rapporter om natur och miljö nr 2015:1. Länsstyrelsen Gotlands län.
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| 55. |
- Jonsell, Mats
(författare)
-
Knäppare och praktbaggar m.fl. - på finska
- 2015
-
Ingår i: Entomologisk tidskrift. - 0013-886X. ; 136, s. 120-120
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Annan publikation (populärvet., debatt m.m.)abstract
- Detta är en bokrecension av "Heliövaara, K., Mannerkoski, I., Muona, J., Siitonen, J. & Silfverberg, H. 2014. Hyppivät ja hohtavat. – Metsäkustannus." ISBN: 9789526612386.
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| 56. |
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| 57. |
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| 58. |
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| 59. |
- Jonsell, Mats
(författare)
-
Stubbrytning - ett hot mot vedskalbaggar?
- 2016
-
Ingår i: Entomologisk tidskrift. - 0013-886X. ; 137, s. 151-161
-
Tidskriftsartikel (refereegranskat)abstract
- Stump harvest after clear felling is a new method to extract bioenergy from the forest. However, removing coarse dead wood from the forest landscape might be in conflict with preserving the saproxylic (wood-living) biodiversity. This paper summarizes results from research investigating what effect we can expect on wood-living beetles. Species lists from 10 studies comprising a total of 549 beetle species were compiled. Of these species, 320 were classified as saproxylic. In spruce stumps the studies detected 44% of the Swedish saproxylic beetle fauna that has been categorized as ”living in spruce wood”. However, deciduous stumps seem richer in red-listed species. Some species associated with sun-exposed wood have a large proportion of their populations in clear-felling stumps. This indicates that a large-scale removal of the stumps will potentially threaten many species. The present focus to target spruce at stumps harvest, is well motivated from the saproxylic beetles’ view.
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| 60. |
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| 61. |
- Jonsell, Mats
(författare)
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Svart vapenfluga, Hermetia illucens: invasiv mat?
- 2017
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 138, s. 231-232
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Tidskriftsartikel (refereegranskat)abstract
- The Black soldier fly Hermetia illucens (Linnaeus, 1758) has been caught outdoors in Sweden for the first time. This fly has been spread all over the world, much because it effectively can decay various organic matters and therefore used for composting. The Swedish record was done in Uppsala, close to such a mass breeding of the fly, which has the aim to provide material for research on the species. Studies on the tolerance of the species suggest that Swedish climate is too cold for the species. However, the future will tell if it can colonise outdoor habitats here and risk to become an invasive species.
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| 62. |
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| 63. |
- Jonsell, Mats
(författare)
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Vedlevande skalbaggar på lind
- 2011
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 132, s. 167-186
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Tidskriftsartikel (refereegranskat)
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| 64. |
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| 65. |
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| 66. |
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| 67. |
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| 68. |
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| 69. |
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| 70. |
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| 71. |
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| 72. |
- Karlsson, Malin, et al.
(författare)
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En inplanterad population av svartoxe (Ceruchus chrysomelinus) 17 år senare: etablering, vedval och framtid
- 2013
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 134, s. 207-220
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Tidskriftsartikel (refereegranskat)abstract
- In the Nordic countries, the wood-living lucanid beetle Ceruchus chrysomelinus is a rare species connected to natural forests. In Sweden, it is red-listed and classified as endangered (EN). In an action plan for its preservation done by the Swedish Environmental Protection Agency, it was suggested that the result of a translocation of C. chrysomelinus made in 1995 should be evaluated. The translocation was done by moving some logs containing high numbers of the beetle into an area devoid of the species but with expected suitable habitat. Our aim was thus to study this translocation, and specifically we asked if the establishment has been successful, how much the species have dispersed, which wood qualities the species use and how large supply of suitable wood there is on the site. The study was performed during 2012 in Pansaruddens nature reserve, a spruce dominated forest close to Uppsala in Sweden. Circular study plots were established with a radius of 75 m around the translocated logs in both sites. All lying dead wood trunks ≥10 cm in breast height within the study plots were investigated. Generalized linear models showed that the presence of C. chrysomelinus could be explained by high degree of decay, absence of white rot and by a large size of the log. The species had dispersed, but only very short distances were detected (<10 m from the translocated logs). On average the total amount of lying dead wood for the two study plots were 52 respectively 35 m3/hectare. Only 4 % of the total dead wood supply was suitable for C. chrysomelinus, when considering the wood qualities found important for the species in this study.
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| 73. |
- Klopfstein, Seraina, 1980-, et al.
(författare)
-
An interactive key to the European genera of Campopleginae (Hymenoptera, Ichneumonidae) and 20 new species for Sweden
- 2022
-
Ingår i: Entomologisk Tidskrift. - Björnlunda, Sweden. - 0013-886X. ; 143, s. 121-156
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Tidskriftsartikel (refereegranskat)abstract
- Darwin wasps of the subfamily Campopleginae are among the most poorly studied insect groups, which is to a large part due to inadequate identification tools. The currently 835 European species are classified into 42 genera, some of a somewhat unclear delimitation, and are very hard to identify using the incomplete, scattered and often poorly illustrated literature. We here assess different character systems for genus identification and provide an interactive, dynamic online key to the European genera. We apply this key to identify 3,500 specimens of the Swedish Malaise Trap Project to genus level. We then chose ten comparatively small genera for species-level identification, reporting a total of 37 species, 20 of which are new records for Sweden. The large number of species only found in a single trap location indicates that a lot remains to be discovered, even in an otherwise well-known fauna such as Sweden’s.
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| 74. |
- Källander, Clas, et al.
(författare)
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Noctua tertia Mentzer, Moberg & Fibiger, 1991 funnen i Sverige (Lepidoptera, Noctuidae)
- 2020
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Ingår i: Entomologisk Tidskrift. - : Sveriges Entomologiska Förening. - 0013-886X. ; 141:1-2, s. 51-59
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- Noctu tertia was introduced as a new species for Northern Europe in the annual review of Macrolepidoptera records from Sweden 2017 (Palmqvist 2018). The current article describes the observations and studies underlying this report. An immigration of presumed Noctua janthina females with non-typical characteristics reaching Gotland during late September 2015 aroused our interest and triggered a more thorough investigation. Examination of their genitalia revealed that several of the captured specimens exhibited characteristics that were identical to those of Noctua tertia. We then extended our studies to a larger material including females with a wide range of variations in wing pattern and coloration and of males with typical janthina/tertia appearance. In total we have identified eleven Noctua tertia four males and seven females, most of them from Gotland but also three from Skåne. The oldest specimen was from 1988 and the newest from 2017. Available information of the geographical distribution of N. tertia is reviewed and the characteristics and biological information of the species in the Noctua janthe/janthina/tertia complex is further developed and discussed.
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| 75. |
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| 76. |
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| 77. |
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| 78. |
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| 79. |
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| 80. |
- Lindelöw, Åke
(författare)
-
Näst sista skalbaggskatalogen
- 2011
-
Ingår i: Entomologisk tidskrift. - 0013-886X. ; 132, s. 124-124
-
Annan publikation (övrigt vetenskapligt/konstnärligt)
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| 81. |
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| 82. |
- Lindelöw, Åke, et al.
(författare)
-
Tetropium gabrieli and Ips cembrae (Coleoptera; Cerambycidae and Curculionidae) - invasion of two potential pest species on larch in Sweden.
- 2015
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 136, s. 103-112
-
Tidskriftsartikel (refereegranskat)abstract
- ample of this is when non-native tree species are planted and some of their associated insect species also manage to establish in the new area. In Sweden, different species of larch (Larix spp.) are non-native tree species which has been planted over increasing areas during the last 50 years. The aim of the present study was to investigate if non-native bark- and wood-boring insects on larch have established in Sweden and, if so, their area of distribution. We used felled larch trees in 17 larch stands as a survey method for a broad spectrum of bark- and wood-boring species and pheromone-baited traps in seven ports and 47 larch stands for the bark beetle Ips cembrae during the years 2009-2014. Two non-native species were recorded: the cerambycid Tetropium gabrieli and the bark beetle I. cembrae. Tetropium gabrieli dominated in the felled larch trees and is distributed in the south-eastern part of Sweden. Within its range of distribution it seems to be present in most larch stands with suitable breeding material. Prior to our study this species was only recorded in dead larch trees close to a port. Ips cembrae was caught in traps in nine larch stands in the most southern part of Sweden demonstrating for the first time that the species have established in Sweden. The first individuals were caught in two nearby stands in 2011 and inspections of the stands revealed that the species had reproduced already in 2007 or 2008 in standing killed trees. The trapping demonstrated that the population level of I. cembrae increased more than four times from 2012 to 2014. Both T. gabrieli and I. cembrae are potential pest species and should be considered in the management of larch stands.
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| 83. |
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| 84. |
- Lindelöw, Åke
(författare)
-
Vivlar på tyska - en guldgruva!
- 2011
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 132, s. 120-120
-
Annan publikation (övrigt vetenskapligt/konstnärligt)
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| 85. |
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| 86. |
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| 87. |
- Liston, Andrew, et al.
(författare)
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New and poorly-known sawflies (Hymenoptera, Tenthredinoidea) from Sweden, with taxonomic notes on Palaearctic Heptamelus species described by Swedish authors.
- 2018
-
Ingår i: Entomologisk Tidskrift. - Uppsala, Sweden. - 0013-886X. ; 139, s. 119-131
-
Tidskriftsartikel (refereegranskat)abstract
- First records from Sweden of eight sawfly taxa are presented: Arge annulata Konow, 1891(Argidae), Allantus cingillipes (Kontuniemi, 1947), Allantus melanarius (Klug, 1818),Apethymus cereus (Klug, 1818), Dolerus liogaster schneideri Kiaer, 1898, Fenusella hortulana(Klug, 1818), Monophadnus spinolae (Klug, 1816), and Tenthredo mandibularisFabricius, 1804 (Tenthredinidae). The problematic taxonomic status of Arge annulata isdiscussed, and it is recorded for the first time from Germany and Estonia. For Heptamelusdahlbomi (Thomson, 1870) (Heptamelidae): a lectotype is designated for Caenoneuradahlbomi, H. ussuriensis Malaise, 1931 is placed as its junior synonym, Athyrium distentifoliumrecorded as a new host, and additional distribution data are presented, including thefirst records from Austria. A lectotype is designated for Heptamelus magnocularis Malaise,1931, and this species briefly compared with H. dahlbomi.
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| 88. |
- Ljungberg, Håkan
(författare)
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Springers rörbock (Donacia springeri) – hur utbredd kan den vara i Sverige?
- 2013
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 134, s. 130-134
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Tidskriftsartikel (refereegranskat)abstract
- The leaf beetle Donacia springeri Müller 1916, was long known from Sweden through 19-th century records from Scania in addition to several records from the 1970s onwards at a single locality near Stockholm. A targeted search in 26 lakes around Stockholm in 2013 resulted in the discovery of a new locality situated ca. 11 km from the existing. The species seems to be associated with small oligotrophic lakes surrounded by Sphagnum-fens and with growth of sedges (mainly Carex elata) along the shores; a lake-type which is rather common in Sweden. In the light of this information, the possible distribution of the species is discussed, along with the implications for an upcoming red list evaluation.
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| 89. |
- Lundkvist, Håkan, et al.
(författare)
-
Svenska skalbaggar 1. En blev två - några artsplittar bland svenska skalbaggar
- 2021
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 142:1-2, s. 71-89
-
Tidskriftsartikel (refereegranskat)abstract
- Recent studies of beetle specimens deposited in collections have revealed five species new to the Swedish fauna to be hiding amongst their closely related species. In some cases, the species known to the Swedish fauna are widespread and considered common, making it easy to overlook the slight differences that separate them from the similar and less common species. Some of these species are restricted to a specific host plant or habitat, making ecological notes valuable for identification. The following species are presented: Sericus brunneus (Linnaeus, 1758) and S. sulcipennis Buysson, 1893 (Elateridae); Tetrops praeustus (Linnaeus, 1758) and T. gilvipes (Faldermann, 1837) (Cerambycidae); Trachys troglodytes Gyllenhal, 1817 and T. compressus Abeille, 1891 (Buprestidae); Meligethes subaeneus Sturm, 1845 and M. cardaminicola Audisio & Cline, 2015 (Nitidulidae); and Stenichnus collaris (Müller & Kunze, 1822) (Staphylinidae; Scydmaeninae), which has been shown to consist of two very similar species. Each species pair is described including the information on known distribution in Sweden and a key to species.
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| 90. |
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| 91. |
- Mugerwa Pettersson, Roger
(författare)
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Till minne av Stig Lundberg (1928–2020)
- 2020
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 141, s. 129-148
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- Jägmästare Stig Lundberg föddes den 12:e augusti 1928 och växte upp i Luleå. Som son till jägmästare Hjalmar Lundberg berättade Stig för oss om hur han som en liten gosse på realskolan i Luleå 1939 skickades ut med en burk för att samla skalbaggar åt läraren. När Stig återvände med en skalbagge i burken hände det att läraren, efter att exemplaret studerats med lupp, stoppade burken i egen ficka med orden: “Den behåller jag!”. Stig bestämde sig redan då att han som vuxen skulle göra detsamma som läraren, den legendariske jordlöparspecialisten Carl H. Lindroth, gå omkring med en lupp runt halsen och samla in intressanta skalbaggar. Och så kom det också att bli under mer än sextio år.
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| 92. |
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| 93. |
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| 94. |
- Nilsson, L Anders
(författare)
-
The type material of Swedish bees (Hymenoptera, Apoidea) IV. Bees from Thomson’s collection
- 2010
-
Ingår i: Entomologisk Tidskrift. - 0013-886X. ; 131:1, s. 73-94
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Tidskriftsartikel (refereegranskat)abstract
- This report presents the fourth part of the results of a taxonomic revision and examination of the actual, reputed or potential type material of bees of Swedish origin. Focus is on the status, depository, type locality, condition and history of name-bearing specimens. Here, 35 bee taxa based on material in the collection of the leading Swedish entomologist Carl Gustaf Thomson (1824 – 1899) have been examined. After a biographical sketch of Thomson and a summary of his contribution on bees and his legacy, lectotypes are designated for the specific taxa (bold= valid epithet) Colletes picistigma Thomson, 1872, Hylaeus clathratus Thomson, 1870, H. genalis Thomson, 1872, H. marginatus Thomson, 1870, Andrena curvungula Thomson, 1870, A. integra Thomson, 1870, A. morawitzi Thomson, 1872, A. nasalis Thomson, 1870, A. nigrospina Thomson, 1872, A. violascens Thomson, 1870, Sphecodes crassus Thomson, 1870, Megachile curvicrus Thomson, 1872 (now subspecies of M. nigriventris Schenck), M. lapponica Thomson, 1872 and Epeolus glacialis Alfken, 1913 (here identified as a distinct subspecies, stat. nov., of E. alpinus Friese). Already labelled but unpublished lectotypes of Hylaeus submarginatus Thomson, 1872, Andrena albo-fasciata Thomson, 1870, Epeolus productus Thomson, 1870 and E. rufipes Thomson, 1870 are validated. Further taxa examined (including more syntypes designated whenever located) are Andrena intermedia Thomson, 1870, Sphecodes pilifrons Thomson, 1870, S. puncticeps Thomson, 1870, S. reticulatus Thomson, 1870, Coelioxys obtusispina Thomson, 1872, Osmia claviventris Thomson, 1872 (now Hoplitis c.), O. truncatula Thomson, 1872 (now subspecies of O. leaiana (Kirby)), Nomada bifida Thomson, 1872, N. glabella Thomson, 1870, N. laeta Thomson, 1870, N. punctiscuta Thomson, 1870, N. 5-spinosa Thomson, 1870, N. rufilabris Thomson, 1870, N. villosa Thomson, 1870, Apathus lissonurus Thomson, 1872, Bombus arenicola Thomson, 1872 and B. brevigena Thomson, 1870 (now subspecies of B. wurflenii Radoszkowski). The typifications and validations define authentic material, type localities and establish correct synonymies, e.g., Andrena violascens Thomson is a synonym of A. fulvida Schenck, 1853.
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| 95. |
- Nilsson, Sven
(författare)
-
A method for population studies of butterflies at the landscape scale.
- 2002
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 123:4, s. 193-201
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Tidskriftsartikel (refereegranskat)abstract
- I here propose a modification of the English butterfly census method (Pollard 1977) for studies of large areas with a relatively low density of butterflies. The transect line should not be more than 10 m from any point in open terrain and open forests, but only 5 m from sunny edges and patches with a high density of flowers. The transect line is adjusted between visits to most intensively cover sites with the highest density of flowers. However, between years the transect lines should be the same at a given locality and season to make statistical tests possible. Visits should only be made in suitable weather (English rules). A binocular with a short near limit facilitates species identification. The method was applied in 2001-2002 to a farm at Stenbrohult, southern Sweden. If visits are spaced about 14 days apart from the middle of May to the middle of August a high proportion of the resident species can be covered. Rare species may be missed even at weekly visits. However, from a statistically point of view it is better to cover two areas every 14th day than one area every 7th day. More spaced out visits minimize double counts of a given individual (statistical advantage) and also double the area that can be covered with a given effort.
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| 96. |
- Nilsson, Sven, et al.
(författare)
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Biodiversity at Linnaeus birthplace in the parish of Stenbrohult, southern Sweden. 3. Red-listed wood-beetles
- 2003
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 124:3, s. 137-157
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Tidskriftsartikel (refereegranskat)abstract
- Wooded pasture and older forest with dead trees, about 10% of an area of 3000 ha in the central part of the parish of Stenbrohult, was inventoried for wood-living beetles in 1985-2002. In the study areas Carl Linnaeus was born in 1707, and he spent his summers there until 1728. All standard methods for finding wood-beetles were used, including many window traps and 170 wood mould samples. As a new method, from 1992 and later, fragments in wood mould in hollow trees were collected and determined to species in the laboratory. We found 74 red-listed wood-beetles, including 13 threatened species (categories EN and VU). The highest numbers of threatened wood-beetles were found on properties owned by the church or by the largest landowners. This was because old (>150 years), southern deciduous trees were largely absent on small farm properties. Recorded habitats in the study area for the red-listed species are given. Old hollow oaks Quercus robur, beeches Fagus sylvatica, small-leaved limes Tilia cordata, elms Ulmus glabra and big dead birches Betula spp. were the most important substrates for threatened species in the study area. These substrates, mainly old living trees but also standing dead trees, are also crucial habitats for species listed as possibly globally threatened and found in the study area: Corticeus fasciatus, Ptenidium gressneri, Plectophloeus nitidus, Oxypoda arborea, Gnorimus nobilis, Ampedus hjorti, Athous mutilatus, Procraerus tibialis, Xylophilus corticalis, Grynocharis oblonga, Cryptophagus fuscicornis, C. labilis, Latridius brevicollis, Mycetophagus populi, Hypulus quercinus. Mycetochara axillaris. Phloeophagus lignarius and P. thomsoni. Threats to the long-term survival of the red-listed species are discussed. The need for rapid habitat restoration to lower the "extinction debt" is stressed. This is especially urgent for features that have declined most since Linnaeus time, e.g. old sun-exposed oaks and other southern deciduous trees. The number of big dead spruces has probably increased in recent decades, and therefore species dependent on spruce are unlikely to be part of the extinction debt.
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| 97. |
- Nilsson, Sven, et al.
(författare)
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Biodiversity at Linnaeus' birthplace in the parish of Stenbrohult, southern Sweden. 5. Butterflies and burnet moths.
- 2006
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 127:1-2, s. 39-55
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Tidskriftsartikel (refereegranskat)abstract
- We counted butterflies in almost all open grasslands in an area of 8000 hectare over five years (2001-2005) in the central part of the parish of Stenbrohult, southern Sweden (Fig. 1; 56 degrees 37' N, 14 degrees 11' O). This area is currently dominated by forests. Grasslands, mainly grazed by cattle and horses, only cover about 6 % of the area. The study area consisted of 18 farms, most ot them are surrounded by coniferous forests and some bordering lakes. Three farms are protected as nature reserves and more reserves are planned for at least four more farms. Habitat types were mapped on each farm (Table 1). Standardized transects counts, with 6 - 8 annual visits evenly spread over the period from the middle of May to the middle of August, were performed in all 18 farms. The annual maximal counts of butterflies and burnet moths at one occasion in each subarea and year are presented (Appendix). The sum of these were 56 682 individuals of 46 species of butterflies and 2 791 individuals of 4 species of burnet moths. One individual each of two additional species, Limenitis populi in 2000 and Issoria lathonia in 2003, was found outside the standardized counts. Many species were recorded in low numbers in 2001 and high in 2003, some increasing by an order of magnitude. There were also a very high variation of species richness and numbers of individual species between the different farms. The highest number of species were found on farms in the central part of the study-area and on farms with traditionally managed and unfertilized hay-meadows. We discuss the possible causes of these variations. Our results show that monitoring schemes must include many plots and years to reveal population trends due to land management changes. Many species occurred in low numbers and since suitable habitats have decreased they may constitute an extinction debt, e.g. Pyrgus malvae, Leptidea sinapis, Aporia crataegi, Coenonympha pamphilus, Lasiommata maera, Polyommatus semiargus and Zygeana.filipendulae. We propose measures to prevent this debt to be realised.
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| 98. |
- Nilsson, Sven, et al.
(författare)
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Biologisk mångfald i Linnés hembygd i Småland. 7. Blomflugor (Diptera, Syrphidae).
- 2012
-
Ingår i: Entomologisk tidskrift. - 0013-886X. ; 133, s. 137-166
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Tidskriftsartikel (refereegranskat)abstract
- Hoverflies are important pollinators, but constitute a less studied group of insects. In this study we collected hoverflies in most open grasslands and woodlands in an area of 5000 hectares over six years (2004-2009) in the central part of the parish of Stenbrohult, southern Sweden (Fig. 1; 56o 37´ N, 14o 11´ E). The studied area is dominated by spruce forests, but deciduous forests are relatively abundant. Grasslands, mainly grazed by cattle and horses, cover about 6 % of the area. We sampled 20 subareas/farms dominated by grasslands, surrounded by forests and/or lakes. Mires and unpolluted wetlands are common in the study area, and the large Lake Möckeln in the west is unregulated. Parts of four farms are protected as nature reserves and more reserves are planned for other farms in the area. Hoverflies were surveyed by 6-8 annual visits to each subarea. The visits were evenly spread over the period from the middle of May to the middle of August, covering the open grasslands. On most farms additional visits were made, also in April and September, and one farm(Djäknabygd) was visited almost weekly from May to August each year from 2004 to 2012. In total we found 225 hoverfly species (Appendix). On the most thoroughly surveyed farm Djäknabygd 198 species were recorded on an area of about 17 hectares, as far as we know the highest species richness documented in Europe in such a small area. There was a high variation of species richness between the other farms, varying from 74 to 140. The highest number of species was found on farms in the central and western parts of the study-area, where old deciduous trees are most common and traditionally managed (harvest in late summer) and unfertilized hay-meadows still exists. Remarkable findings were among others; Brachyopa bicolor, Brachyopa panzeri, Callicera aenea, Callicera aurata, Chalcosyrphus piger, Chalcosyrphus valgus, Ferdinandea ruficornis, Hammerschmidtia ferruginea,Pocota personata, Temnostoma apiforme and Xylota meigeniana which all are of European conservation concern. We discuss the hoverfly fauna from a nature conservation point of view, and give details about habitat, phenology and flower use for the less common species.
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| 99. |
- Nilsson, Sven, et al.
(författare)
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Biology and distribution of chafers (Coleoptera, Scarabaeidae) living in hollow trees in Sweden.
- 2002
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 123:3, s. 81-97
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Tidskriftsartikel (refereegranskat)abstract
- We review the ecology and distributions of the chafers Liocola marmorata (F.), Gnorimus nobilis (L.) and Gnorimus variabilis (L.) in Sweden based on museum and several large private collections. These species live in hollow deciduous trees, in Sweden especially in oaks. The former and recently documented localities are shown on maps. More than 100 years ago, all the species as well as their habitats were more common in Sweden than today. One problem when interpreting old finds is that hollow trees do not seem to have been examined by entomologists, except during the last 50 years. However, Gnorimus nobilis, which often visits flowers, was frequently found in former times. In the province of Skane, which has been most intensively studied among Swedish provinces, the number of known localities for Gnorimus nobilis has decreased from 13 before 1975 to 6 after that year, despite more intensive studies during the last 25 years. Of the studied species, Liocola marmorata has had the largest contraction of its range in Sweden. It has disappeared from the southwestern part, but occurs still in many localities in the provinces of Ostergotland and Uppland. In Uppland, the absence of Osmoderma eremita, which has a similar niche, may decrease the competition in tree hollows and favour L. marmorata. Gnorimus varibilis has a preference for sun-exposed oaks, and can live in downed dead trees long after the trunk has fallen. It has been found at about 30 localities in Sweden during the last 25 years. We suggest that Gnorimus variabilis is a globally threatened species and that Sweden has a strong responsibility to preserve this species. There are still seven localities in southeastern Sweden where all three species as well as Osmoderma eremita occur. All these localities harbour a high number of threatened saproxylic beetles. We discuss the chafers living in hollow trees as indicator species and propose conservation measures for them. The highest priority should be given to increase the survival rate and number of very old trees, especially oaks, in and near stands which inhabit the species and contains a large number of suitable hollow trees.
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| 100. |
- Nilsson, Sven, et al.
(författare)
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Ceruchus chrysomelinus (Coleoptera, Lucanidae), a disappearing virgin forest relict species?
- 2000
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 121:4, s. 137-146
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Tidskriftsartikel (refereegranskat)abstract
- The lucanid beetle Ceruchus chrysomelinus Hochenwarth inhabits forests with a high density of moist red-rotten logs of both coniferous and deciduous trees. This habitat is very rare in Swedish forests of today and so is the species in itself. There are no recent records from the Swedish provinces of Skane, Halland, Vastergotland, Ostergotland and Halsingland, but new localities have recently been found on the island of Oland and in the provinces Sodermanland and Vastmanland. Palaeoentomological studies in southern Smaland indicate that the species was significantly more common 1 000 - 2 000 years ago than at present. In the few remaining large old-growth forests in northern and central Europe the species seems to be one of the most numerous wood beetle species, but it is probably dependent on a continuous supply of suitable logs at the landscape scale. At the majority of the present Swedish localities the number of suitable logs is low and the surrounding environments are unsuitable. Several sites with suitable habitat in the province of Uppland seem to be lacking the species, although populations exist only 1-2 km away. This could be explained by a low dispersal propensity. The largest populations now occur in Uppland at the lower part of River Dalalven and around Lake Vallen. During the last 25 years (1975-1999) Ceruchus chrysomelinus has been found on 10 localities outside of Uppland. We propose that the species can be used as an indicator species of forests with high conservation value.
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