Rola wskaźnikowa wszystkożernej grupy nicieni glebowych

Wasilewska, Lucyna

doi:ISSN 0013-2969

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Title: Rola wskaźnikowa wszystkożernej grupy nicieni glebowych

Abstract:

The following trophic groups can be distinguished among soil nematodes:bacteriophages, mycophages, parasites of higher plants, omnivores and predators.Representatives of all the above groups can be found in all habitats, although thequantitative relations between them differ. The group of omnivores proved to besusceptible to cultivation operations. The author includes in this group representativesof the superfamily Dorylaimoidea (De Man 1876) Thorne 1934, with theexception of the genera Longidorus, Xiphinema and Trichodorus. The numbers ofdorylaimids were greatest in grassland, lower in forests and lowest in cultivatedfields. The author’s own studies show that natural habitats contain greater numbersof this group than is the case with cultivated fields (Tab. I), and also that thehighest percentage in relation to the whole nematode community is formed by theomnivorous group in meadows and pastures, fewer in a forest habitat and by farthe least in cultivated fields (Fig. 1). It may be concluded from comparison of theannual metabolism of this trophic group in several habitats that its significanc e issmall in cultivated fields and far greater in a more natural habitat (Fig. 2). Theauthor also found that the numbers of the omnivorous group were inversel y correlatedwith intensity of fertilization by sheep manure (Fig. 3). It can be assumed that the cause of the reduction in the group of omnivores in cultivated fields incontrary to natural habitats, lies in the cultivatio n operations carried out there.

References:

Ebert, M. 1966 —Vergleichende Faunistik und Okologie der Dorylaimiden derUmgebung Erlangens (Nematoda, Dorylaimida) — Z. Morph. Okol. Tiere, 58:109—143.
Johnson, S.R., Ferris,J.M. 1971 — Nematode community structure of selecteddeciduous woodlots — J. Nematol. 3: 315—316.
Norton, D.C., Frederick, L.R., Ponchillia, P.E. and Nyhan, J.W.1971 —Correlation of nematodes and soil properties in soybean fields — J. Nematol. 3:154—163.
Sandner, H., Wasilewska, L. 1970 — The role of the habit at in formingcommunities of soil nematodes — Proc. IX int. nem. Symp. (Warsaw, 1967), 92:391—408.
Wasilewska, L. 1967 — Analysis of the occurrence of nematodes in alfalfa crops.II. Abundance and quantitative relations between species and ecologica lgroupsof species — Ekol. Pol. A, 15: 347—371.
Wasilewska, L. 1971a — Nematodes of the dunes in the Kampions Forest. II. Community structure based on numbers of individuals, state of biomass andrespiratory metabolism — Ekol. Pol. 19 : 651—688.
Wasilewska, L. 1971b — Klasyfikacja troficzna nicieni glebowych i roślinnych —Wiad, Ekol. 17: 379—388.
Wasilewska, L. 1971c — Nicienie młodnika sosnowego w Nadleśnictwie Laski,Puszcza Kampinoska — Zeszyty probl. Post .Nauk roln. 121: 159—167.
Wasilewska, L.1974a — Number, biomass and metabolic activity of nematodesof two cultivated fields in Turew — Zesz. probl. Pest. Nauk roln. 154: 419—442.
Wasilewska, L. 1974b —Analysis of the sheep pasture ecosystem in Pieniny Mountains (Carpathians). XIII. Quantitative distribution and respiratory metabolism of nematodes on mountain pasture — Ekol. Pol. 22.
Wasilewska, L. 1974c — Evaluation of quantitative distribution of soil nematodes of a pasture in the vicinity of Sofia — Zesz. probl. Post. Nauk roln. 154: 213—225.
Wasilewska, L. (inpress) — Number, biomass and metabolism of nematodes of moist temperate coniferous forest in Vancouver B.C. Canada.
Wasilewska, L., Papirnska, E. (inpress) — Energy transfer through the soil nematode group on the rye field at Rogaczewo near Turew — Pol. ecol. Stud. 1.
Yeates, G. W. 1970 —The diversity of soil nematode faunas — Pedobiologia, 10: 104—107.