The parasitic Hymenoptera in a beech forest on limestone. 3, the role of leaf litter for the parasitoid species

• Autorzy: Ulrich W.
• Języki publikacji: EN

Abstrakty

EN

In a mixed beech forest growing on limestone, the effect of an enhanced and a reduced layer of leaf litter on the emergence of parasitic Hymenoptera (as well as their hosts) was studied. A long term increase (4 years with an initially 5-fold value) of the leaf layer and a short term experiment (1 year, factor 5) resulted in arise of the total density of soil living parasitoids. The abundance of parasitoids which attack hosts in the herb layer or canopy declined. However, in both groups diversity and evenness was lowered. A reduction of the layer of leaf litter resulted in lower densities of the parasitoids of soil living hosts, but higher abundances of the parasitoids of hosts in other strata. The lacking leaf layer caused a reduction in the number of species and lowered both diversity and evenness. The lacking leaf layer also caused changes in the species composition. Experiments with dead snails to attract necrophagous insects and their parasitoids covered by different amounts of leaf litter revealed a species specific reaction to the leaf cover. Total parasitism rates were not reduced under a thick layer of leaf litter. No protective function of the leaf cover could be detected.

Słowa kluczowe

EN

abundances; ground-photo-eclectors; Hymenoptera; leaf litter; parasitism rates; parasitoids

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 1998
• Tom: Vol. 46, no 3
• Strony: 311--326
• Opis fizyczny: Bibliogr. 14 poz., tab., wykr.

Twórcy

autor

Ulrich W.

• Nicholas Copernicus University in Toruń, Department of Animal Ecology, Gagarina 9, 87-100 Toruń: Poland

Bibliografia

• [1]. Dierschke H., Song J. 1982 - Die Vegetation der Untersuchungsflache des SFB 135 und ihrer Umgebung im Göttinger Wald - Kurzmitt. aus dem SFB 135 - Okosysteme auf Kalkgestein 1: 3-8.
• [2]. Haeselbarth E. 1979 - Zur Parasitierung der Puppen von Foreule (Panohsflammea (Schiff.)), Kiefemspanner (Bupalus piniarius (L.)) und Heidelbeerspanner (Boarmia bistortana (Goeze)) in bayerischen Kiefernwaldem - Z. Ang. Entomol. 87: 186-202; 311-322.
• [3]. Kajak A. 1978 - Analysis of consumption by spiders under laboratory and field conditions - Ekol. Pol. 26: 409-428.
• [4]. Hövemeyer K. 1985 - Die Zweiflugler (Diptera) eines Kalkbuchenwaldes: Lebenszyklen, Raum-Zeit-Muster und Nahrungsbiologie - Thesis Univ. Göttingen.
• [5]. Hövemeyer K. 1992 - Response of Diptera populations to experimentally modified leaf litter input in a beech forest on limestone - Pedobiologia 36: 35-49.
• [6]. Lawton J.H. 1984 - Herbivore community organization: generał models and specific tests with phytophagous insects - In: P.W. Price, C.N. Slobodchikoff and W.S. Gaud 1984: A New Ecology. Novel Approaches To Interactive Systems - New York (Wiley).
• [7]. Pielou E.C. 1977 - Mathematical Ecology - New York (Wiley).
• [8]. Poser G. 1991 - Die Hundertfüβer (Myriopoda: Chilopoda) eines Kalkbuchenwaldes: Populationsökologie, Nahrungsbiologie und Gemeinschaftsstrukturen - Berichte des Forschungszentrums Wald0kosysteme Göttingen A 71: 1-211.
• [9]. Schaefer M (1996) - Die Bodenfauna von Waldern: Biodiversitat in einem ökologischen System - Abh. Math.-Naturw. Klasse Akad. Wiss. Lit. Mainz 1996: 1-81.
• [10]. Stippich G. 1986 - Die Spinnenfauna (Arachnida: Araneida) eines Kalkbuchenwaldes: Bedeutung von Habitatstruktur und Nahrung - Thesis Univ. Göttingen.
• [11]. Ulrich W. 1987 - Wirtsbeziehungen der parasitoiden Hautflügler in einem Kalkbuchenwald (Hymenoptera) - Zool. Jb. Syst. 114: 303-342.
• [12]. Ulrich W. 1988 - Welche Faktoren beeinflussen die Populationen und die Strukturen der Gemeinschaften von bodenlebenden parasitoiden Hymenopteren in einem Buchenwald - Thesis Univ. Göittingen (FRG).
• [13]. Ulrich W. 1998a - The parasitic Hymenoptera in a beech forest on limestone I: Species composition, species turnover, abundance and biomass - Pol. J. Ecol. 46: 261-289.
• [14]. Ulrich W. 1998b - Species composition, coexistence and mortality factors in a carrion exploiting community composed of necrophagous Diptera and their parasitoids - Pol. J. Ecol. (in press).