1 of 16 Published by Polish Botanical Society Acta Agrobotanica ORIGINAL RESEARCH PAPER Spergulo-Chrysanthemetum segeti (Br.-Bl. et de Leeuw 1936) R. Tx. 1937 in the Drawsko Lakeland (Western Pomerania) Zbigniew Sobisz 1 *, Zbigniew Osadowski 1 , Jadwiga Anioł- Kwiatkowska 2 , Zygmunt Kącki 2 1 Department of Botany and Nature Protection, Pomeranian University, Arciszewskiego 22b, 76-200 Słupsk, Poland 2 Department of Botany, University of Wrocław, Kanonia 6/8, 50-328 Wrocław, Poland * Corresponding author. Email: sobisz@apsl.edu.pl Abstract Te species richness and structure of Spergulo-Chrysanthemetum segeti have been assessed on the basis of 25 phytosociological relevés made by the Braun-Blanquet method in the Drawsko Lakeland (Poland). Two variants have been distinguished, Spergulo-Chrysanthemetum segeti chamomilletosum typicum and Spergulo-Chry- santhemetum segeti chamomilletosum with Plantago intermedia. Te paper presents the distribution and analytical characteristics of this subatlantic association against the background of habitat conditions. Keywords segetal community; soil units; Pomerania region; Drawsko Lakeland Introduction Te paper constitutes a continuation of a chorological study of the Spergulo-Chry- santhemetum segeti association in the area of the eastern part of Western Pomerania. In the frst paper, the ecological and biotope characteristics of the Spergulo-Chrysan- themetum segeti association in the Słupsk Plain and the Damnica Upland were pre- sented, in the second one – in the Słowińskie Coast, and in the subsequent one in the Bytów Lakeland and the Białogard Plain [1–4]. Te Drawsko Lakeland is dominated by brown acidifed and leached soils. Te val- leys of the rivers Parsęta, Rega, Stara Rega, Brzeźniczka, and Dębnica are covered with boggy soils. In the Drawa River Valley, south of Drawsko, alluvial soils are found. In the vicinity of Czaplinek and Rydzewo, black (D) and degraded meadow black earth (Dz) occurs [5]. In terms of agricultural land suitability, the soils of rye complexes (which cover 78% of the arable land in total) dominate the Drawsko Lakeland. Worth mention- ing are the soils of wheat complexes (15% of arable land), which larger patches are found between Gudowo and Lubieszewo on Lake Lubie as well as between Karsino and Wełnica. Larger homogeneous areas of the good wheat complex (2) developed from particulate sediment material originating from marginal lakes. Tey occur on gentle clay slopes in the area of Dalewo, Darskowo, and Suliszewo. Te defective wheat complex (3) is represented by soils formed from clays and particulate material sediments. Te larger outlines of that complex cover the slopes of moraine mounds in Dziwogóra, Ogrodno and Ostropole. 56% of the area of the rye complexes comprise very good (4) and good rye (5) complexes. A smaller area is covered by cereal-fodder complexes – (6%) strong (8) and (5%) weak (9) [6]. DOI: 10.5586/aa.1653 Publication history Received: 2015-03-09 Accepted: 2016-02-08 Published: 2016-03-30 Handling editor Elżbieta Weryszko-Chmielewska, Faculty of Horticulture and Landscape Architecture, University of Life Sciences in Lublin, Poland Authors’ contributions ZS, JAK: idea the study; ZS, ZO, JAK, ZK: feld work, writing the manuscript Funding Research supported by the Polish Ministry of Science and Higher Education as part of the statutory activities of the Department of Botany and Nature Protection, Pomeranian University in Słupsk, and of the Department of Botany, University of Wrocław. Competing interests No competing interests have been declared. Copyright notice © The Author(s) 2016. This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits redistribution, commercial and non- commercial, provided that the article is properly cited. Citation Sobisz Z, Osadowski Z, Anioł-Kwiatkowska J, Kącki Z. Spergulo-Chrysanthemetum segeti (Br.-Bl. et de Leeuw 1936) R. Tx. 1937 in the Drawsko Lakeland (Western Pomerania). Acta Agrobot. 2016;69(1):1653. http://dx.doi.org/10.5586/ aa.1653 Digital signature This PDF has been certifed using digital signature with a trusted timestamp to assure its origin and integrity. A verifcation trust dialog appears on the PDF document when it is opened in a compatible PDF reader. Certifcate properties provide further details such as certifcation time and a signing reason in case any alterations made to the fnal content. If the certifcate is missing or invalid it is recommended to verify the article on the journal website.