Old park trees as habitat for saproxylic beetle species
Tóm tắt
Very old trees harbour a diverse fauna of saproxylic insects, many of which are classified as threatened due to the scarcity of this kind of habitat. Parks, which often contain many old trees, are therefore considered to be important sites for this fauna. However parks are intensively managed and dead wood is often removed. Therefore this study compares if the saproxylic beetle fauna in parks is as diverse as it is in more natural stands. Eight ‘Park’ sites at manor houses around lake Mälaren, Sweden were compared with trees in wooded meadows: eight grazed sites, here termed ‘Open’, and 11 sites regrown with younger trees, termed ‘Re-grown’. The comparison was made on lime trees (Tilia spp.): one of the most frequent tree species in old parks which host a diverse beetle fauna. Beetles were sampled with window traps, which in total caught 14,460 saproxylic beetles belonging to 323 species, of which 50 were red-listed. When comparing all saproxylic species, ‘Park’ sites had significantly fewer species than ‘Open’ sites. However, for beetles in hollow trees and for red-listed species there was no significant difference, the number in ‘Park’ being intermediate between ‘Open’ and ‘Re-grown’. Species composition differed between sites, but only marginally so. Therefore, the conclusion is that old park trees on average are as valuable for faunal diversity as trees in more natural sites. Large conservation benefits can be obtained by combining cultural and conservational values in the management of park habitats.
Tài liệu tham khảo
Ahti T, Hämet-Ahti L, Jalas J (1968) Vegetation zones and their sections in north–western Europe. Annales Botanici Fennici 5:169–211
Andersson H (2010) Inventering av insekter i fem linddominerade lokaler i Västmanlands län 2006. Länsstyrelsens rapportserie. Rapport 2010:7, Västerås
Aulén G, Franc N (2008) Hänsynsyta på hygge, förstärkt med mer död ved, blev “nyckelbiotop” med 39 rödlistade skalbaggsarter (A consideration area on a felling site enhanced with dead wood, became a woodland key habitat with 39 redlisted beetle species (Coleoptera) species). Entomologisk Tidskrift 129:53–68
Bengtsson R (2005) Variation in common lime (Tilia × europaea) in Swedish gardens of the 17th and 18th centuries. PhD thesis, Swedish University of Agricultural Sciences, Alnarp
Braak CJFt, Smilauer P (1998) Reference manual and user’s guide to CANOCO for Windows: software for canonical community ordination (version 4). Microcomputer Power, Ithaca
Carpaneto GM, Mazziotta A, Coletti G, Luiselli L, Audisio P (2010) Conflict between insect conservation and public safety: the case study of a saproxylic beetle (Osmoderma eremita) in urban parks. J Insect Conserv 14:555–565
Dufrene M, Legendre P (1997) Species assemblages and indicator species: the need for a flexible asymmetrical approach. Ecol Monogr 67:345–366
Ehnström B (2006) Åtgärdsprogram för skalbaggar på skogslind. Rapport 5552, Naturvårdsverket, Stockholm
Ehnström B, Waldén HW (1986) Faunavård i skogsbruket–den lägre faunan. (The protection and management of endangered and declining invertebrate species in Swedish woodlands). Skogsstyrelsen, Jönköping
Eliasson P, Nilsson SG (2002) ‘You should hate young oaks and young noblemen’. The environmental history of oaks in eighteenth- and nineteenth-century Sweden. Environ Hist 7:659–677
Emanuelsson U (2009) The rural landscapes of Europe. How man has shaped European nature. Formas, Stockholm
Gärdenfors U (2010) The 2010 red list of Swedish species. ArtDatabanken, SLU, Uppsala
Gärdenfors U, Baranowski R (1992) Skalbaggar anpassade till öppna respektive slutna ädellövskogar föredrar olika trädslag (Beetles living in open deciduous forests prefer different tree species than those living in dense forests). Entomologisk Tidskrift 113:1–11
Gerell R (2000) Alléernas betydelse för rödlistade vedlevande skalbaggar (The importance of avenues for threatened saproxylic beetles). Entomologisk Tidskrift 121:59–66
Grove SJ (2002) Saproxylic insect ecology and the sustainable management of forests. Annu Rev Ecol Syst 33:1–23
Hansen V (1964) Fortegnelse over Danmarks biller 1.og 2.del. (Catalogue of the Coleoptera of Denmark 1 and 2nd part). Entomologiske Meddelelser 33:1–507
Hanski I (1994) A practical model of metapopulation dynamics. J Anim Ecol 63:151–162
Jonsell M (2004) Old park trees: a highly desirable resource for both history and beetle biodiversity. J Arboric 30:238–244
Jonsell M (2008) Vedlevande skalbaggar i Drottningholms slottspark. Entomologisk Tidskrift 129:103–119
Jonsell M, Sahlin E (2010) Inventering av vedlevande skalbaggar på lindar Södermanlands, Uppsala och Västmanlands län. Rapport, länsstyreslen i Västmanlands län, Västerås
Koch K (1989–1992) Die Käfer Mitteleuropas. Ökologie. Band 1–3. Goecke & Evers, Krefeld
Leps J, Smilauer P (2003) Multivariate analysis of ecological data using CANOCO. Cambridge University Press, Cambridge
Lundberg S, Gustafsson B (1995) Catalogus Coleopterorum Sueciae. Naturhistoriska riksmuseet, Stockholm
Oleksa A, Ulrich W, Gawronski R (2006) Occurrence of the marbled rose-chafer (Protaetia lugubris Herbst, Coleoptera, Cetoniidae) in rural avenues in northern Poland. J Insect Conserv 10:241–247
Palm T (1959) Die Holz-und Rindenkäfer der süd-und mittelschwedischen Laubbäume. Opuscula Entomologica Supplementum 16:1–374
Raab B, Vedin H (1995) Climate, lakes and rivers. National atlas of Sweden, Bra Böcker, Höganäs
Ranius T (2007) Extinction risks in metapopulations of a beetle inhabiting hollow trees predicted from time series. Ecography 30:716–726
Ranius T, Jansson N (2000) The influence of forest regrowth, original canopy cover and tree size on saproxylic beetles associated with old oaks. Biol Conserv 95:85–94
Ranius T, Niklasson M, Berg N (2009) Development of tree hollows in penduculate oak (Quercus robur). For Ecol Manag 257:303–310
Ranius T, Johansson V, Fahrig L (2010) A comparison of patch connectivity measures using data on invertebrates in hollow oaks. Ecography 33:971–978
Sernander R (1926) Stockholms natur. Almqvist & Wiksells förlag, Uppsala
Slotte H (1997) Hamling–historisk tillbakablick och råd för naturvårdare (Pollarding - a look back on its history, and advice to nature conservationists). Svensk Botanisk Tidskrift 91:1–21
Sörensson M (2008) AHA–en enkel metod for prioritering av vedentomologiska naturvärden hos träd i sydsvenska park-och kulturmiljöer (AHA – a simple method for evaluating conservation priorities of trees in South Swedish parks and urban areas from an entomo-saproxylic viewpoint). Entomologisk Tidskrift 129:81–90
Speight MCD (1989) Saproxylic invertebrates and their conservation. Council of Europe, Strasbourg
Sverdrup-Thygeson A, Skarpaas O, Ødegaard F (2010) Hollow oaks and beetle conservation: the significance of the surroundings. Biodivers Conserv 19:837–852
Warren MS, Key RS (1991) Woodlands: past, present and potentials for insects. In: Collins NM, Thomas JA (eds) The conservation of insects and their habitats, 15th Symp. of R. Entomol. Soc. London. Academic Press, London, pp 155–211
Wikars L-O, Sahlin E, Ranius T (2005) A comparison of three methods to estimate species richness of saproxylic beetles (Coleoptera) in logs and high stumps of Norway spruce. Can Entomol 137:304–324
Wisenfield J (1995) Experience at Hatfield Forest, Essex, with restoration of old pollards and establishment of new ones. Biol J Linn Soc 56(Suppl):181–183