Ábrahám Levente (szerk.): Válogatott tanulmányok VII. - Natura Somogyiensis 22. (Kaposvár, 2012)

Winkler D. - Erdő Á.: A comparative study of breeding bird communities in representative habitats of the Sárosfő Nature Reserve area

Winkler D. & Erdő Á.: Breeding bird communities 215 reedbeds (RB): reedbeds around the lakes composed dominantly by Common Reed (Phragmites australis) and dispersedly also by Narrow-leaf Cattail (Typha angustifolia) and Broadleaf Cattail (Typha latifolia). meadow (ME): Pastinaco-Arrhenatheretum, a layered meadow association with an average hight of 120 cm. Apart from the dominant Tall Oatgrass (Arrhenatherum elatius) further characteristic species are the Wild Carrot (Daucus carota), the Cocksfoot (Dactylis glomerata), the Field Wood-rush (Luzula campestris), the Tall Buttercup (Ranunculus acris) and the German Catchfly (Viscaria vulgaris). young pedunculate oak afforestation (OA): afforestation in an early successional stage. Average tree height is about 1.7 m. The cover of young trees is 30-35%. The main tree species is the Pedunculate Oak (Quercus robur), scattered trees of European Elombeam (Carpinus betulus) and Small-leaved Lime (Tilia cordata) can be found too. Additional species in this 'shrub layer' include the Hawthorn (Crataegus monogyna), the European Privet (Ligustrum vulgare) and the Blackberry (Rubus fruticosus). The cover of herb layer is high (80-85%) with typical species like the Giant Goldenrod (Solidago gigantea), the Chee Reed Grass (Calamagrostis epigeios) and the Cocksfoot (Dactylis glomerata). low-pole turkey oak-pedunculate oak stands (OF): height of the trees 10-14 m. The coverage of the tree layer is rather high (~80%). Apart from the main tree species, the Turkey Oak (Quercus cerris) and the Pedunculate Oak (Quercus robur), scattered trees of European Ash (Fraxinus excelsior), Silver Birch (Betula pendula) and European Alder (Alnus glutinosa) are also present. The shrub layer is developed moderately with a coverage of about 20-25%. Common species in this layer are the Common Dogwood (Cornus sanguined), the Hawthorn (Crataegus monogyna) and the European Spindle (Euonymus europaeus). The cover of the herbaceous layer is considerably high (~60%) including species like the Wood Bluegrass (Poa nemoralis), the Wood Melick (Melica uniflora) and the Sweet Woodruff (Galium odoratum). riverine ash-alder forest (AF): stands along the Kígyós stream and northwards from Lake 2. Average tree height is 20 m, the cover of the tree layer is 85-90%. Apart from the main tree, the European Alder (Alnus glutinosa), the European Ash (Fraxinus excel­sior) and the (Salix alba) is also present with proportion of 5% each. The shrub layer has moderate cover (30-35%) and includes species like the Common Dogwood (Cornus sanguined), the Alder Buckthorn (Frangula alnus) and the Old Man's Beard (Clematis vitaiba). Typical species in the moderately developed herb layer are the Stinging Nettle (Urtica dioica), the Goutweed (Aegopodium podagraria), the Hollowroot (Corydalis cava) and the Spinulose Woodfem (Dryopteris carthusiana). allochthonous Scots pine forest (PF): almost pure Scots Pine (Pinus sylvestris) stands with scattered trees of Pedunculate Oak (Quercus robur). In the moderately developed shrub layer we can find the Elder (Sambucus nigra), the Hawthorn (Crataegus monogy­na) and the Blackberry (Rubus fruticosus). The herbaceous layer is poor, mostly com­posed by Cocksfoot (Dactylis glomerata) and Greater Celandine (Chelidonium május). Survey methods Bird community composition data were obtained by conducting standard transect counts using the data of the belts of 25 m on both sides of the observer (Báldi et al. 1997). For the bird survey nearly same-sized sample areas (~6 ha) were selected from each habitat type. Bird censi were carried out twice during the breeding season (once in April and once in late May 2010). Observations took place in early mornings (about 5.00-9.00 am). The method used was suitable for recording pigeon- (Columbiformes), woodpecker- (Piciformes) and passerine bird (Passeriformes) species only.

Next

/
Oldalképek
Tartalom