DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 9-10/2011 str. 58 <-- 58 --> PDF |
T. Kirin, J. Kralj, D. Ćiković, Z. Dolenec: HABITAT SELECTIONAND SIMILARITYOF THE FOREST ...Šumarski list br. 9–10, CXXXV (2011), 467-475 Goldcrest and coniferous forests was very strong: Gold-that studied beech standswere older on Žumberak, crest was one of the four the most abundant species inwhile other forest stands were older in Medvednica. that forest type.Forests in Medvednica generally had higher shrub layer density (Table 2). Significant differences among Similarity of songbird communities of particular ecological groups of birds breeding in particular forest forest types between two study areas was high(0.872 ± types was found only in beech, mixed deciduous and 0.070),while floristic similarity of tree species was relmixed coniferous stands, for ground and hole nesters atively low(0.475 ± 0.120) (Fig 3). Contrary to florisand birds feeding on the ground, on the bark and in the tic structure, structural characteristics of forests scrub layer (Table3).Densities of almost all ecological showed much higher differences between two study groups were higher on Medvednica, with the exception areas. Only oak stands didn’t show any significant difof those in beech stands. ference in measured structural characteristics.The average tree basal area and ratio of small trees showed Table 2 Structural differences of forest types between two studied areas. Differences were tested by Kruskal – Walllis test. p:* < 0.05, **< 0.01, ***< 0.005.There were no significant differences for any structural characteristic in the oak stands. Tablica 2.Razlike u strukturi pojedinih tipova šuma između dva istraživana područja. Razlike su testirane Kruskal – Wallisovim testom. p: * < 0.05, **< 0.01, ***< 0.005. U hrastovim sastojinama nije bilo statistički značajnih razlika između istraživanih područja. Beech stands (N=39) /bukove sastojine Coniferous stands (N=11) /crnogorične sastojine Mixed deciduous stands(N=27) /mješovite listopadne sastojine Mixed coniferous stands (N=12) /mješovite crnogorične sastojine MedZSGHMedZSGHMedZSGHMedZSGH Number of trees/ha /broj stabala/ha6784668.444***48810717.097**9059680.92937214257.385** Scrub density (stems /ha) /gustoća grmlja (stabljika/ha)4883.31244.88.796***1750.0928.61.310835.93227.36.502**1531.31218.80.117 Ground cover (%) /pokrovnost tla (%)45293.33561194.422*36380.13859256.173** Tree cover (%) /pokrovnost (sklop)krošnji(%)86943.953*65823.04583914.768*78913.684 Ratio of small trees (%) /udio tankih stabala (%)66478.613***41695.166*66751.65037736.490** Average tree basal area (m 2 /ha) /prosječna temeljnica(m2/ha)0.0630.0996.601**0.1100.0415.143*0.0500.0363.3340.1400.0387.385* 2 Table 3 Differences among densities (in pairs/km) of ecological group of birds between two study areas. Differences were tested by Kruskal –Wallis test. p: * < 0.05, **< 0.01. Tablica 3.Razlike u gustoćama (parovi/km2) pojedinih ekoloških grupa ptica između istraživanih područja. Razlike su testirane Kruskal – Wallisovim testom. p: * < 0.05, **< 0.01. Beech stands (N=39) /bukove sastojine Mixed deciduous stands (N=27) /mješovite listopadne sastojine Mixed coniferous stands (N=12) /mješovite crnogorične sastojine MedZSGHMedZSGHMedZSGH ground nesters/gnjezdarice tla3.313.340.0152.553.595.161 *4.142.556.417 ** hole nesters/dupljašice2.724.777.425 **5.252.894.535 *4.142.233.113 feeding on the ground/hranjenje na tlu4.926.534.225 *7.405.903.3928.446.054.071 * feeding in scrub layer/hranjenje u grmlju1.360.854.446 **1.111.390.6141.591.271.100 bark gleaning/hranjenje na deblu0.511.062.3221.510.584.213 *1.430.003.618 The total songbird density was positively correlated with the average tree basal area (Table 4). Hole nesters and bark gleaning species preferred the same forest characteristics and both had the densest populations in oak stands.They were both negatively correlated with the number of small trees and number of trees on the plot and positively correlated with average tree basal area. Canopy-feeders showed positive and ground-feeders negative correlation with shrub layer density. Birds nesting in the canopy showed positive correlation with the number of the large trees, and average tree basal area and had the highest density of population in mixed coniferous stands. |