Acta Scientiarum Polonorum
Silvarum Colendarum Ratio et Industria Lignaria

ISSN:1644-0722, e-ISSN:2450-7997

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original articleIssue 18 (1) 2019 pp. 23–30

Paweł Grochalski, Bartłomiej Bednarz

Zakład Ochrony lasu, Entomologii i Klimatologii Leśnej Instytutu Ochrony Ekosystemów Leśnych, Uniwersytet Rolniczy w Krakowie.

The impact of breeding cormorants’ colonies (Phalacrocorax carbo L.) on radial increments of Scotch pine (Pinus sylvestris L.) in Kąty Rybackie nature reserve

Abstract

On the basis of the dendrochronological analysis it was found that from the beginning of 2003, when the black cormorant breeding colony appeared on the pines of the Baltic dune Scots pine woods in the Kąty Rybackie reserve, the yearly growth of the annual tree-rings decreased markedly from year to year. The average reduction in radial growth in 30 trees, compared to the same number of pines of similar age growing outside of the breeding colony, reached 57.3% in the period 2003-2013. The tree-ring widths decreases were caused by direct impact of birds nesting on tree crowns and by indirect influence, through the impact of cormorant droppings fertilized the soil on the processes of pine growth and development. Using the non-parametric Mann-Whitney U test, it was shown that compared to the control trees, the decrease in the increment of pines settled by cormorants was highly significant, at p = 0.0002.

Keywords: dendrochronology, cormorants, tree-ring widths, Scots pine
pub/.pdf Full text available in english in Adobe Acrobat format:
https://www.forestry.actapol.net/issue1/volume/3_1_2019.pdf

https://doi.org/10.17306/J.AFW.2019.1.3

For citation:

MLA Grochalski, Paweł, and Bartłomiej Bednarz. "Wpływ kolonii lęgowej kormorana czarnego (Phalacrocorax carbo L.) na przyrost radialny sosny zwyczajnej (Pinus sylvestris L.) w rezerwacie przyrody Kąty Rybackie [The impact of breeding cormorants’ colonies (Phalacrocorax carbo L.) on radial increments of Scotch pine (Pinus sylvestris L.) in Kąty Rybackie nature reserve]." Acta Sci.Pol. Silv. 18.1 (2019): . https://doi.org/10.17306/J.AFW.2019.1.3
APA (2019). Wpływ kolonii lęgowej kormorana czarnego (Phalacrocorax carbo L.) na przyrost radialny sosny zwyczajnej (Pinus sylvestris L.) w rezerwacie przyrody Kąty Rybackie [The impact of breeding cormorants’ colonies (Phalacrocorax carbo L.) on radial increments of Scotch pine (Pinus sylvestris L.) in Kąty Rybackie nature reserve]. Acta Sci.Pol. Silv. 18 (1), https://doi.org/10.17306/J.AFW.2019.1.3
ISO 690 GROCHALSKI, Paweł, BEDNARZ, Bartłomiej. Wpływ kolonii lęgowej kormorana czarnego (Phalacrocorax carbo L.) na przyrost radialny sosny zwyczajnej (Pinus sylvestris L.) w rezerwacie przyrody Kąty Rybackie [The impact of breeding cormorants’ colonies (Phalacrocorax carbo L.) on radial increments of Scotch pine (Pinus sylvestris L.) in Kąty Rybackie nature reserve]. Acta Sci.Pol. Silv., 2019, 18.1: . https://doi.org/10.17306/J.AFW.2019.1.3
Streszczenie w języku polskim:
https://www.forestry.actapol.net/tom18/zeszyt1/streszczenie-3.html