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| 2. |
- Elmarsdóttir, Ásrún, et al.
(author)
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Effects of afforestation on biodiversity
- 2008
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In: Affornord. Effects of afforestation on ecosystems, landscape and rural development. - 9789289317184 ; 562, s. 37-47
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Book chapter (other academic/artistic)
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| 3. |
- Fjellberg, Arne, et al.
(author)
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2.8. Structural changes in Collembola populations following replanting of birch forest with spruce in North Norway.
- 2007
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In: Proceedings from the AFFORNORD conference, Reykholt, Iceland June 18-22, 2005.. - 9789289314435 ; , s. 119-125
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Book chapter (other academic/artistic)abstract
- The purpose of the present study was to demonstrate possible effects on Collembola populations by changes in tree composition in natural birch forest in coastal North Norway. In the study area (Dønnes, Nordland County) parts of the natural mixed birch forest has been replanted with Norway spruce and Sitka spruce. Soil samples were collected in June and October 2004. A total of 52 species of Collembola were found (36 in birch, 32 Sitka, 34 Norway spruce). Eighteen species were common to all three sites, while birch had 12 unique species. Nine species from the coniferous plantations were not seen in birch, while Norway spruce and Sitka had only minor differences. The most abundant species were Mesaphorura macrochaeta, Isotomiella minor, Parisotoma notabilis and Megalothorax miniumus which made up 55% of all individuals found. Total abundance averaged on 91,000 (Sitka), 53,000 (Norway spruce) and 32,000 (birch) inds./m², with spring densities 40-80% higher than in autumn. The planting of Sitka/Norway spruce changed species composition but gave no significant reduction in species number, while population densities increased considerably.
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| 7. |
- Fjellberg, Arne
(author)
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Hoppstjärtar i Norden.
- 2006
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In: Fauna och Flora: populär tidskrift för biologi. - 0014-8903. ; 101:3, s. 16-19
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Journal article (peer-reviewed)
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| 8. |
- Fjellberg, Arne
(author)
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Icelandic Collembola. Revised checklist and general comments.
- 2007
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In: Entomologica Scandinavica. Supplementum. - 0105-3574. ; 64, s. 45-60
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Journal article (peer-reviewed)abstract
- The last survey of Icelandic Collembola is that of Olafsson (1991) reporting 77 species and 26 taxa of infraspecific level (forms, varieties and aberrations of which some are good species, others not). The Study of Icelandic soil fauna has intensified over the last decades, mainly in the fields of applied sciences (agriculture, forestry). However, few works report Collembola down to species level (Sigurdardottir 1991, Davidsson 1996, Gudleifsson & Bjarnadottir-2002). The present author visited Iceland five times during 2003-2005 and collected a large number of soil samples resulting in a considerable increase in the number of known species, now amounting to 149. The highest number of species (81) were found in seashore habitats, which also had the highest proportion of habitat specialists (30%). Young and degraded habitats (lava fields, grassland) had considerably lower species numbers and were more dominated by generalists. Old stands of coniferous forest (planted) were impoverished compared to mature indigenous birch forest.
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| 10. |
- Fjellberg, Arne
(author)
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The Collembola of Fennoscandia and Denmark. Part II: Entomobryomorpha and Symphypleona.
- 2007
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Book (other academic/artistic)abstract
- This volume completes the survey of the ca. 400 species of springtails, which can be found in Finland, Sweden, Norway, Denmark, Iceland, the Faroes and the Arctic Islands and includes the sections Entomobryomorpha and Symphypleona. The first volume, published in 1998, covered Poduromorpha. Identification keys and full descriptions of the species are richly illustrated by line drawings. Photos are provided for some species displaying characteristic patterns of pigmentation. New diagnostic characters, including sensillary chaetotaxy and details of the mouth apparatus, are introduced. With the appearence of this book soil scientists and the interested amateur have now a modern tool to identify all species of Nordic springtails. In addition the habitat preferences and geographical distribuition are summarised. The book will be of general interest to everyone working on springtail identification.
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| 11. |
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| 12. |
- Potapov, Mikhail, et al.
(author)
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Taxonomy of the Proisotoma complex. Redefinition of genera and description of new species of Scutisotoma and Weberacantha (Collembola, Isotomidae)
- 2006
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In: Zootaxa. - 1175-5334. ; :1382, s. 3-74
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Journal article (peer-reviewed)abstract
- The paper provides new information on morphological characters which are useful in generic diagnostics of the Proisotoma complex of Isotomidae. Based on this information, a number of known species are excluded from the redefined Proisotoma s. str. and moved to the genus Scutisotoma Bagnall, 1949, which is again given generic status. The following genera are given more precise definitions: Subisotoma Stach, 1947, Ballistura Borner, 1906, Proisotoma Borner, 1901 and Weberacantha Christiansen, 1951. A new genus, Strenzketoma, is erected for the species "Proisotoma" buddenbrocki Strenzke. Scutisotoma titusi (Folsom), S. muriphila (Grinbergs), and S. ladaki (Denis) are redescribed. Fourteen new species of the genus Scutisotoma (S. acorrelata sp. n., S. baica sp. n., S. dodecocellata sp. n., S. indigirka sp. n., S. karadagi sp. n., S. kolymica sp. n., S. longisensilla sp. n., S. matalini sp. n., S. millimetrica sp. n., S. montana sp. n., S. nicksmeti sp. n., S. schisti sp. n., S. stachanoremi sp. n., S. tenuidentifera sp. n.) and two new species of Weberacantha (W. echinodermata sp. n., W. magnomucrella sp. n.) are described. Types of S. ananevae ( Babenko & Bulavintsev), S. armeriae (Fjellberg), S. christianseni (Stach), S. oirota (Vilkamaa), S. stepposa (Martynova), S. tianshanica (Martynova), and S. tolerans (Babenko) have been studied. Keys to genera and to the known Holarctic species of Scutisotoma Bagnall and Weberacantha Christiansen are given.
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| 13. |
- Ronquist, Fredrik, et al.
(author)
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Completing Linnaeus’s inventory of the Swedish insect fauna: only 5,000 species left?
- 2020
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In: PLOS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 15:3
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Journal article (peer-reviewed)abstract
- Despite more than 250 years of taxonomic research, we still have only a vague idea about the true size and composition of the faunas and floras of the planet. Many biodiversity inventories provide limited insight because they focus on a small taxonomic subsample or a tiny geographic area. Here, we report on the size and composition of the Swedish insect fauna, thought to represent roughly half of the diversity of multicellular life in one of the largest European countries. Our results are based on more than a decade of data from the Swedish Taxonomy Initiative and its massive inventory of the country’s insect fauna, the Swedish Malaise Trap Project The fauna is considered one of the best known in the world, but the initiative has nevertheless revealed a surprising amount of hidden diversity: more than 3,000 new species (301 new to science) have been documented so far. Here, we use three independent methods to analyze the true size and composition of the fauna at the family or subfamily level: (1) assessments by experts who have been working on the most poorly known groups in the fauna; (2) estimates based on the proportion of new species discovered in the Malaise trap inventory; and (3) extrapolations based on species abundance and incidence data from the inventory. For the last method, we develop a new estimator, the combined non-parametric estimator, which we show is less sensitive to poor coverage of the species pool than other popular estimators. The three methods converge on similar estimates of the size and composition of the fauna, suggesting that it comprises around 33,000 species. Of those, 8,600 (26%) were unknown at the start of the inventory and 5,000 (15%) still await discovery. We analyze the taxonomic and ecological composition of the estimated fauna, and show that most of the new species belong to Hymenoptera and Diptera groups that are decomposers or parasitoids. Thus, current knowledge of the Swedish insect fauna is strongly biased taxonomically and ecologically, and we show that similar but even stronger biases have distorted our understanding of the fauna in the past. We analyze latitudinal gradients in the size and composition of known European insect faunas and show that several of the patterns contradict the Swedish data, presumably due to similar knowledge biases. Addressing these biases is critical in understanding insect biomes and the ecosystem services they provide. Our results emphasize the need to broaden the taxonomic scope of current insect monitoring efforts, a task that is all the more urgent as recent studies indicate a possible worldwide decline in insect faunas.
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| 14. |
- Stevens, Mark I., et al.
(author)
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Redescription of the Antarctic springtail Desoria klovstadi using morphological and molecular evidence
- 2006
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In: Polar Biology. - : Springer Science and Business Media LLC. - 1432-2056 .- 0722-4060. ; 29:10, s. 820-830
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Journal article (peer-reviewed)abstract
- Isotoma klovstadi Carpenter, 1902 was one of the first Collembola described from the Antarctic continent. It was first collected in November 1899 during the British Antarctic Expedition on the north coast of Victoria Land in the Ross Sea region. It is now known to occur in an extensive area of northern Victoria Land, including the offshore Possession, Coulman, and Foyn Islands. More recently, L klovstadi was moved to the genus Gnathisotoma Cassagnau, 1957 and has been included in this genus in an unpublished checklist (online) of all described Collembola. Here, we redescribe the species and use morphological and molecular (COI and 18S genes) evidence to investigate its affinities within the Isotominae. We show that it does not belong to Gnathisotoma, or Isotoma s. str. (the viridis group) as currently conceived, but is likely to be part of the species complex of Isotoma s. lat. We discuss reasons for placing it in the genus Desoria Nicolet, 1841. Our results reinforce the already high level of endemicity in the Antarctic fauna and emphasise the value of both morphological and molecular studies in examining relict Gondwanan taxa and their evolutionary relationships with those of other Southern Hemisphere continents.
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