| 1. |
- Kurina, Olavi, et al.
(author)
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Fungus gnats (Diptera: Sciaroidea excl. Sciaridae) in the Swedish boreonemoral forests
- 2004
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In: Studia dipterologica. ; 11:2, s. 471-488
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Journal article (peer-reviewed)abstract
- Fungus gnats in boreonemoral forests of south Sweden are studied using material collected with Malaise and window traps from 17 localities in the years 2001 and 2002. 250 species are recorded including 76 species new to Sweden. 14 of these are found in Fennoscandia for the first time: Docosia setosa Landrock, D. spec. (indet. sensu Hutson et al. 1980), Brevicornu cognatum Ostroverkhova, Mycetophila eppingensis Chandler, M. lobulata A. Zaitzev, M. pyrenaica Matile, M. subsigillata A. Zaitzev, Sceptonia cryptocauda Chandler, S. flavipuncta Edwards, S. longisetosa Ševcik, S. pilosa Bukowski, S. pughi Chandler, Sciophila interrupta (Winnertz) and S. plurisetosa Edwards. One new synonym is proposed: Dynatosoma dihaeta Polevoi, 1995 = Dynatosoma schachti Plassmann, 1999 syn. nov.
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| 2. |
- Nilsson, R. Henrik, 1976, et al.
(author)
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Phylogeography of Hyphoderma setigerum (Basidiomycota) in the Northern Hemisphere
- 2003
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In: Mycological Research. ; 107:6, s. 645-652
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Journal article (peer-reviewed)abstract
- Previous studies of morphological variation in the homobasidiomycete Hyphoderma setigerum have lead to suspicions of a species complex. This study explores variation in DNA sequences from the nuclear ribosomal ITS region of 45 specimens from America, Asia, and Europe in a phylogeographic context. Based on molecular analysis, morphological studies, and crossing tests, nine preliminary taxa are shown to exist inside the species complex, and the two previously described segregate species H. subsetigerum and H. nudicephalum are confirmed. The molecular analysis shows evidence of allopatric differentiation over intercontinental distances. Only one of the nine well-supported clades has a geographic distribution spanning more than one continent, probably indicating the importance of vicariance in the evolution of this species complex. The basionym of H. setigerum, Thelephora setigera, is neotypified to fix the application of that name.
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| 3. |
- Nordén, Björn, 1965, et al.
(author)
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Dead wood in semi-natural temperate broadleaved woodland: contribution of coarse and fine dead wood, attached dead wood and stumps
- 2004
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In: Forest Ecology and Management. - : Elsevier BV. - 0378-1127. ; 194:1-3, s. 235-248
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Journal article (peer-reviewed)abstract
- Dead wood is essential for biodiversity in forests and is therefore often surveyed in conservation inventories. Usually only coarse downed trees (logs) and standing dead trees (snags) are surveyed, but dead wood also occurs on living trees, in stumps, and in fallen branches. Attached, standing (including stumps) and downed dead wood with a diameter of more than I cm was surveyed in 25 semi-natural stands of temperate broadleaved woodland dominated by oak in southern Sweden (most trees younger than 70 years but with an older generation of Quercus, and often Corylus scrub). This study is primarily motivated by the rising interest in biofuel harvesting by thinning which will affect dead wood structure in forests, especially the finer dead wood fractions. The sites in this study contained on average 14.3 m(3)/ha coarse dead wood (defined as wood with a diameter >10 cm), which is more than twice as much as in production woodland. Fine dead wood (diameter 1-10 cm) made up another 12.2 m(3)/ha (45% of the total dead wood volume). Of the fine dead wood, on average 20% was oak wood and 71 % was wood from other broadleaved trees. The coarse dead wood fraction consisted equally of oak wood (46%) and wood from other broadleaved species (47%). Coniferous wood amounted to 7% (coarse dead wood) or 8% (fine dead wood). The total dead wood volume was dominated by downed (66%) and standing dead wood (22%), while attached dead wood and stumps amounted to smaller fractions (6% each). The total volume of fine dead wood did not correlate with the total volume of coarse dead wood. These results therefore suggest that fine dead wood cannot be predicted from conservation surveys of coarse dead wood. The value for biodiversity of fine dead wood is discussed, and should not be overlooked in conservation work due to the fact that for example, many fungi and insects are associated with it. (C) 2004 Elsevier B.V. All rights reserved.
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| 4. |
- Nordén, Björn, 1965, et al.
(author)
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Relative importance of coarse and fine woody debris for the diversity of wood-inhabiting fungi in temperate broadleaf forests
- 2004
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In: Biological Conservation. - 0006-3207. ; 117:1, s. 1-10
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Journal article (peer-reviewed)abstract
- Dead wood is considered important in forest conservation, but patterns of fungal diversity on dead wood have rarely been quantified. We investigated the relative importance of coarse (diameter > 10 cm) and fine woody debris (1-10 cm) for fungi in broadleaf forests in southern Sweden. The numbers of species per unit wood volume and per forest area were significantly higher for fine than for coarse woody debris for both ascomycetes and basidiomycetes. When the number of species was plotted against the number of records, coarse woody debris was more species rich than fine woody debris for a given number of basidiomycete records. Of the ascomycetes. 75% were found exclusively on fine woody debris (the corresponding proportion for basidiomycetes is 30%), 2% Were found exclusively on coarse woody debris (basidiomycetes 26%, and 23%,) of the species were found on both diameter classes (basidiomycetes 44%). We conclude that fine woody debris is important for diversity of wood-inhabiting fungi, especially ascomycctes. in this forest type. However, coarse woody debris must also be provided to insure the occurrence of many species of basidiomycetes. (C) 2003 Elsevier Ltd. All rights reserved.
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