Wyniki wyszukiwania

1

Abandoned cropland as a habitat of the Whinchat Saxicola rubetra in SW Poland

100%

Orlowski G.

Acta Ornithologica

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2004

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tom 39

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nr 1

The study was carried out on 94 abandoned arable fields (0.1-83.5 ha) comprising a total area of 400 ha in the intensively farmed region of the Wrocław plain (54.8 km², SW Poland). A total of 101 Whinchat territories were found in the study area, all of them in abandoned crop fields with a well-developed layer of dried perennials from the previous year (Tanacetum vulgare, Artemisia vulgaris, Solidago sp.). Whinchats occupied 56 (60%) of the 94 fields surveyed. The probability of a Whinchat occupying a particular field was closely related to its size: the probability of occupation was 50% in fields of about 1.8 ha, and rose to 100% in fields larger than 13 ha. Single males occupied thirty-eight territories (37.6%). The number of Whinchat territories per occupied abandoned field lay between 1 and 14. Thirty-three fields held only a single Whinchat territory. The density of Whinchat territories was negatively correlated with the size of an abandoned field. Single males inhabited the smallest fields.

2

Breeding biology and ecology of Whinchat Saxicola rubetra on abandoned farmland of Opole Province (SW Poland)

80%

Frankiewicz J.

Acta Zoologica Cracoviensia. Ser.A Vertebrata

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2008

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tom 51A

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nr 1-2

3

Changes in breeding populations of six farmland bird species in Western Poland between 1987 and 2007

70%

Krajewska A., Mizera T.

Polish Journal of Ecology

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2010

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tom 58

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nr 3

The breeding populations of the Skylark Alauda arvensis, Yellowhammer Emberiza citrinella, Corn Bunting Miliaria calandra, Yellow Wagtail Motacilla flava, Whinchat Saxicola rubetra, and Red-backed Shrike Lanius collurio were censused by the mapping method on 315 ha of intensive farmland in W Poland. Results obtained in 2006 and 2007 were compared with previously published data from 1987 to 1997. Changes in habitat structure, mainly the decline of margin habitats, and the intensification of agricultural production, which both occurred between the two study periods, affected breeding bird populations; M. flava showed drastic long-term decreasing trends, and M. calandra increased significantly in number. The other four species showed year-to-year variation rather than directional trends. Numbers of A. arvensis declined from 1987 to the late 1990s and subsequently increased. Generally, population trends of the studied species were similar to those in other long-term study plots in Poland but differed from trends in Western Europe.

4

Importance of young shelterbelts for breeding avifauna in agricultural landscape [Turew area, West Poland]

61%

Kujawa K.

Polish Journal of Ecology

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2004

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tom 52

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nr 4

Protection of high biodiversity in an intensively farmed areas is strongly related to managing the diverse structure of a landscape, for example by planting shelterbelts. The study was aimed at recognition of avifauna dynamics in young (with the age of 1–4 years at the beginning of the study) shelterbelts (N=9) and at estimation of their importance for farmland birds. Bird density was estimated by mapping method in successive years 1996–2001 and the data were combined and analysed in respect to age of shelterbelts. Eighteen breeding species were found (5–8 pairs km⁻¹), among them most abundant were Corn Bunting (Miliaria calandra) (with dominance of 33%), Yellow Wagtail (Motacilla flava) (19%) and Whitethroat (Sylvia communis) (12%). No trend in the changes of species richness and total density was recorded. The density of species preferring building nests and/or feeding in herb layer (like Yellow Wagtail, Skylark Alauda arvensis and Whinchat Saxicola rubetra) decreased during study period while the density of species associated to higher layers of vegetation like Yellowhammer (Emberiza citrinella), Red-backed Shrike (Lanius collurio) increased. According to earlier study, bird species richness and abundance in studied young shelterbelts were lower than in several dozens years old ones. However, in relation to species colonization both classes of shelterbelts (species building their nests on the ground or in low shrubs), young shelterbelts were as important as old ones.

Ograniczanie wyników

2 Polish Journal of Ecology

1 Acta Ornithologica

1 Acta Zoologica Cracoviensia. Ser.A Vertebrata

1 Frankiewicz J.

1 Krajewska A.

1 Kujawa K.

1 Mizera T.

1 Orlowski G.

1 2010

1 2008

2 2004

Abandoned cropland as a habitat of the Whinchat Saxicola rubetra in SW Poland

Breeding biology and ecology of Whinchat Saxicola rubetra on abandoned farmland of Opole Province (SW Poland)

Changes in breeding populations of six farmland bird species in Western Poland between 1987 and 2007

Importance of young shelterbelts for breeding avifauna in agricultural landscape [Turew area, West Poland]