Wyniki wyszukiwania

1

Enchytraeids [Oligochaeta] in the agricultural landscape

100%

Nowak E.

Polish Journal of Ecology

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2004

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tom 52

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nr 2

Enchytraeids are the most important detritophages in farmlang. Their density, species composition, and body lenght were assessed in four crop fields and adjacent shelterbelts in Turew area (Wielkopolska, West Poland). The density in crop fields varied between 3000 and 13000 ind. m⁻², whereas in woodlots from 7000 to 15000 ind. m⁻². In the absence of earthworms in cultivated fields, enchytraeids contributed to 2-5% of the total biomass of soil invertebrates. Enchytraeid species living in crop fields were not specific of this habitat. The community occurring in the ecotone (between the woodlot and field) was similar to that in the crop fields with respect to the species composition, and to the youngest woodlots with respect to the abundance and body size. Over the last 25-year period, numbers and diversity (H') of enchytraeids in investigated fields did not change but the size of an average individual decreased.

2

Enchytraeids [Enchytraeidae, Oligochaeta] in midfield shelterbelts of different age and in adjoining croplands

80%

Nowak E.

Polish Journal of Ecology

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2007

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tom 55

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nr 4

The objective of this paper was to recognize the influence of forest strips planted (as the shelterbelts) in agricultural area, on adjoining cereal fields basing on the distribution and composition of enchytraeid community. Species composition, density and individual size of enchytraeids were estimated in October and April 2003–2005 along two transects: 6 and 11 years old shelterbelts > ecotones > fields (at a distance of 15 and 50 m. from the wood strip) and in two reference sites: large (about 100 ha) forest stand and the field (“control” field) located in deforested area. The results have been compared with the published results of the previous studies made in the same area four years before (1999–2000). Samples were collected with soil corer 10 cm2 in area and 15 cm deep. Ten samples in each site were taken twice a year. Sixteen species were found in total. The range of density and biomass of enchytraeids for all study sites accounted for 1.6 to 15.3 ind.m⁻² and 55 to 956 mg f.wt. m⁻² (i.e.15– 308 mg d.w.) respectively. The lowest density was obserwed in the control field located in the deforested area. However, density and biomass of enchytraeids in the fields accounted for 67% and 47% respectively of those in shelterbelts. Species composition of enchytraeids in the young (2–11 yrs old) forest strips and in the adjacent fields was similar, however different from those in the forest stand and in old (150 yrs) shelterbelt. The response of enchytraeids to grass litter introduced on the soil surface was assessed in the experiment performed in a control field and in the transect of wood strip > field. The 7–10 portions of dried grass Dactylis glomerata (L.), (10 g each) were exposed in each plot for 12 and 18 months. More animals was found in the upper soil layer taken below the exposed litter as well as the density of all enchytraeids and percent share of the dominant genus Enchytraeus increased in the soil after 18 months of litter exposure.

3

The role of Lumbricus rubellus Hoffm. in determining biotic and abiotic properties of peat soils

80%

Makulec G.

Polish Journal of Ecology

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2002

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tom 50

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nr 3

4

Enchytraeid communities [Enchytraeidae, Oligochaeta] of the ash-alder carr [Circaeo-Alnetum] in two regions of Poland

80%

Pilipiuk I.

Fragmenta Faunistica

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2001

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tom 44

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nr 1

Ograniczanie wyników

3 Polish Journal of Ecology

1 Fragmenta Faunistica

2 Nowak E.

1 Makulec G.

1 Pilipiuk I.

1 2007

1 2004

1 2002

1 2001

Enchytraeids [Oligochaeta] in the agricultural landscape

Enchytraeids [Enchytraeidae, Oligochaeta] in midfield shelterbelts of different age and in adjoining croplands

The role of Lumbricus rubellus Hoffm. in determining biotic and abiotic properties of peat soils

Enchytraeid communities [Enchytraeidae, Oligochaeta] of the ash-alder carr [Circaeo-Alnetum] in two regions of Poland