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The thrips fauna near Kongsvoll in the Dovrefjellmountains (Sor-Trondelag County, South Norway);distribution and habitat/host plant. (Thys., Insecta)*ANDERS OLSENOlsen, A. 1987. The thrips fauna near Kongsvoll in the Dovrefjell mountains (SorTrondelag County, South Norway); distribution and habitat/host plant. (Thys., Insecta).Fauna norv. Ser. B, 34, 80--91.A total of 27 thrips species were recorded near Kongsvoll in the Dovrefjell mountains(840-1684 m a.s.!.). Ten species were recorded above the tree border (abt 1100 ma.s.!.). Only Apterothrips secticornis (Trybom), Aptinothrips stylifer Trybom andThrips vulgatissimus Haliday were found in the middle alpine (>1430 m a.s.!.). Severalspecies had low population densities in the area, probably due to climatic conditions orto lack of food plants near their elevation limit. Other species were present in highnumbers. The most abundant thrips species was T. vulgatissimus, whose larval developmentis largely dependent on the extensive SaUx vegetation in the area.Scolothrips uzeli ScilIe is reported from Norway for the first time.Anders Olsen, University of Trondheim, Department of Zoology, N-70SS Dragvoll,Norway.INTRODUCTIONKjellsen (1975) studied life history and populationdynamics of Aptinothrips styli/er Trybornand Apterothrips secticornis (Tryborn)on Hardangervidda (Hordaland County,West Norway). More recently Olsen & Solem(1982) listed some thrips records fromNorwegian highlands, and Olsen (1984) reportedsex ratios of three species of thripsliving near Kongsvoll in the Dovrefjell mountains(Sor-Trondelag County, Central Norway).Informations on the Norwegian alpinethrips fauna from other sources are fragmentary.The main objective of the present studywas an inventory of the thrips fauna at Dovrefjell. Collecting started in 1976, but themain field work was done during the summers1977, 1978, and 1984.Nomenclature and systematic arrangementof thrips species follow Jacot-Guillarmod(1970-78), apart from T. atratus Haliday,T. pini Uzel, and T. vulgatissimus Halidaywhich in accordance with Mound et al.(1976) are transferred from TaeniothripsAmyot & Serville to Thrips L. In addition,• Printing grant given by Kongsvoll biologicalstation.80the catalogue of Jacot-Guillarmod does atpresent not comprise subfam. Phlaeothripinae(fam. Phlaeothripidae, suborder Tubulifera),and nomenclature and systematic arrangement here follow Priesner (1964). Foridentifications the keys in Ahlberg (1926),Maltbrek (1932), Priesner (1964), Mound etal. (1976), and Schliephake & Klint (1979)were used. Plant nomenclature is in agreement with Lid (1974).SAMPLING LOCALITIESSampling was carried out near Kongsvoll inthe Dovrefjell mountains. The sampling areaincludes the upper part of the Drivdalen valley,H0gsnyta, Kongsvoll, Gr0nbakken, theGAvAlia areas, and the western parts of theKnutsho mountains. For detailed accountson geology, climate and vegetation in thearea, see e.g. Gjrerevoll (1975), Nordhagen(1943), Strand (1975).Because of conspicuous differences in vegetationand of course altitude, an individualspecies list is presented from each of the followingparts of the area sampled:1) The mixed vegetation along the Drivariver (840 to 940 m a.s.l.). Near Kongsvollbiological station small fields alternateFauna norv. SeT. B. 34: 80-91. Oslo 1987.
with heather moor, willow thickets, birchshrubs, and former fields and/or meadows indifferent regrowing stages. Agricultural impacton vegetation decreases to the north andthe south. In the north the birch forest stretchesdown to the valley bottom before shrubor heather moor take over. To the south theriver mainly flow through shrub or heathervegetation.2) The terrain against GAvAlia (abt 940 to1000 m a.s.l.). In the south and south-easternparts of the sampling area, against GAvAlia,there is a rather large poorly-wooded terrain,in which bogs and tarns alternate with heathersand ridges. The drier parts are largelycovered by shrubs dominated by Salix glaucaL., Salix lapponum L., and Betula nana L.,and, more scattered, Juniperus communis L.3) The subalpine birch forest (840 to 1100m a.s.l.). Both blueberry and meadow birchforests are present. In some localities, especiallyon the western side of the Drivdalenvalley, a luxuriant understory vegetation ispresent, often dominated by Aconitum septentrionaleKoelle and Geranium sylvaticumL.4) The lowalpine region (abt 1100 to1300-1450 m a.s.l.). Due to different propertiesof the rocky ground, a more diversealpine flora is present in the Knutsh6s areacompared to alpine areas on the western sideof the Drivdalen valley. However, on bothsides of the Drivdalen valley, there is a zonecharacterized by willow species just abovethe tree border. In particular, this kind ofvegetation is well developed in the slopes upto Midtre Kmitsh6 mountain, and the dominatingwillow species are Salix phylicijoliaL., S. glauca, S. lapponum, Salix lanata L.,and Salix myrsinites L.5) The middle-alpine region (1300-1450to 1684 m a.s.l.), is characterized by grassesand Cyperaceae species. No part of the samplingarea reach up to the high-alpine.MATERIAL AND METHODSCollecting methods included net-sweepingand beating vegetation over a plastic tray.Specimens were removed from the tray or thenet by a moistend tiny martenhair brush, oran aspirator. Also, specimens were washedoff infested vegetation in soap-containingwater in a special apparatus (e.g. Tayler &Smith 1955, Ota 1968). For separating thripsspecimens from vegetation and litter a batteryof ten Berlese-Tullgren funnels, modifiedaccording to Macfadyens (1955) smallfunnel extractor with air conditioning wasemployed. Flying specimens were caught inthree suction traps of the «exposed conetype» (Johnson 1950, Taylor 1951, 1962)without any segregation mechanism. In additionwater traps of different colours wereused.The material was collected into AGA(Mound et Pitkin 1972, Mound et al. 1976),and afterwards transferred to 60% alcohol. ALeitz binocular, ordinary with 10X oculars,and a standard plankton counting chamber (aplate of plexiglas, 129 x 68 x 8 mm, with fourgrooves, each 120 x 5 x 5 mm, the bredthmeasured at the bottom) were used for countingspecimens. For identification and structuralinvestigations a number of specimenswere mounted on microscope slides in CanadaBalsam or Hoyers mountat. The microscopeused was a Standard WL Zeiss researchmicroscope, with 12.5X oculars, 2.4X, 10X,25X, 40X, and 60X objectives, phase contrast,ocular and optovar (0.8X-l.6X).All the material is deposited in the collectionsof The University of Trondheim, TheMuseum, Zoological department.DISTRIBUTION AND HABITAT/HOSTPLANT OF THE THRIPS SPECIESWiTHIN THE SAMPLING AREA INTHE DOVREFJELL MOUNTAINSIn Tab. 1 the available data on guest/hostrelationships and habitat preference of thethrips species at Dovrefjell are summarized.However, we should bear in mind that thripsare small insects easily spread by wind, andsome of the records may refer to animalsaccidently settled on unrelated vegetation.It is very difficult to judge how far theobserved distribution (Tab. 2) agrees withthe real species distribution in the area, becausethe collection effort varied from placeto place. In addition, several of the recordedspecies apparently have extremely low populationdensities at Dovrefjell and may therefore,by chance, have been missing in some ofthe collections. Nevertheless, it seems reasonablethat the observed distribution patternreflects differences in the climate and vegetationalcover between the localities. Thus, therelativly high number of thrips species recordedin the mixed vegetation along the Driva81
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No. 11987SER. B VOL. 34NO. 1Norwegi
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Professor Ole A. Srether 50 yearsFo
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senting and systemising these chara
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Raddum, G. & O. A. Sa:ther 1981. Ch
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Contribution to the knowledge of th
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dia is the type locality, Livonia,
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Sverre Kobro, Carl Fredrik Liihr, R
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-.Occurrence and life cycle of Dino
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width of 1 2 3 4pronotum n: 19 13 I
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LITTERAT.UREAubert, J. 1946. Les Pl
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Fig. 1. Brachycaudus (Acaudus) popu
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Nymphal development and food consum
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espectively. At 20°C, mean number
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than P. mali. Upon examination of t
Page 31 and 32: The first record of Thaumalea ve"al
Page 33 and 34: Bibio nigriventris Haliday, 1833 (D
Page 35 and 36: ker 1 ~ 27 June 1873 (ZMO 11293). P
Page 37 and 38: Megamerina dolium (Fabricius, 1805)
Page 39 and 40: New Norwegian Empididae (s.str.) (D
Page 41 and 42: A,H. obscura MeigenRY, Rennes0Y: F0
Page 43 and 44: Influence of temperature on the egg
Page 45 and 46: · soo8 12 16 20 24Fig. 2. Day-degr
Page 47: Distribution and seasonal abundance
Page 50 and 51: Table 2. Percentage composition of
Page 52 and 53: ut from a zoogeographical point of
Page 55 and 56: Table I. Tipulidae species recorded
Page 57 and 58: area, Torne Lappmark (Tjeder 1978).
Page 59 and 60: Twelve species of Neuropteroidea an
Page 61 and 62: Table I. Number of specimens (males
Page 63 and 64: etween summer and autumn. H. stigma
Page 65: Distribution and seasonal abundance
Page 68 and 69: Table I. Number of individuals of v
Page 70 and 71: ,[Table 3. Relative abundance of th
Page 72 and 73: ,(Table 6. Number ofspecies collect
Page 74 and 75: there. This is a northern species,
Page 76 and 77: denticulata, Onychiurus armatus (Tu
Page 78 and 79: Kallvellsj0enStroplsj0enKongsvoll B
Page 80 and 81: Faro. PsilidaeMaterial of Psilidae
Page 84 and 85: Table 1. Habitat/host plants for th
Page 86 and 87: Table 1, continuesAltitude StageThr
Page 88 and 89: Sericothrips abnormis (Karny, 1909)
Page 90: collected from birch in Oslo, in Tr
Page 93 and 94: Maltbrek, J. 1932. Frynsevinger. Da
Page 95 and 96: --_..- ---~---'Aug. 1977, a male Ap
Page 97 and 98: zur Kenntnis der Thermopilie bei Sp
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