Contribution to the knowledge of class Sisymbrietea Gutte et Hilbig 1975 in Bulgaria through newly established synanthropic associations

Momchil Nazarov1, Josef Šibik6, Beloslava Genova1, Nikolay Velev1, Gana Gecheva2, Stoyan Georgiev3, Borislav Grigorov4, Constantin Mardari5 and Kiril Vassilev1
1 Bulgarian Academy of Sciences, Institute of Biodiversity and Ecosystem Research, Sofia, Bulgaria
2 Plovdiv University “Paisii Hilendarski”, Faculty of Biology, Plovdiv, Bulgaria
3 Agricultural Academy, Field Crops Institute, Chirpan, Bulgaria
4 Sofia University “St. Kliment Ohridski”, Faculty of Geology and Geography, Sofia, Bulgaria
5 Anastasie Fătu Botanic Garden Alexandru Ioan Cuza University, Iași, Romania
6 Institute of Botany, Plant Science and Biodiversity Center, Slovak Academy of Sciences, Bratislava, Slovakia

Abstract

Nazarov, M., Šibik, J., Genova, B., Velev, N., Gecheva, G., Georgiev, S., Grigorov, B., Msrdari, C. & Vassilev, K. (2024). Contribution to the knowledge of class Sisymbrietea Gutte et Hilbig 1975 in Bulgaria through newly established synanthropic associations. Bulg. J. Agric. Sci., 30 (Supplement 1), 3–10

This research aimed to contribute the knowledge on the syntaxonomy and ecology of class Sisymbrietea Gutte et Hilbig 1975 on the territory of Bulgaria. During the period 2018–2023, 297 phytocoenological relevés with a plot size of 10–16 m2 following the Braun-Blanquet approach were collected. All relevés were contributed to the Balkan Vegetation Database (EU-00-013) and nomenclature of species was standardized according to the Euro+Med PlantBase. The hierarchical clustering was performed using the PC-ORD software package using Bray-Curtis dissimilarity and flexible beta clustering algorithm. The diagnostic species were determined by calculating the Phi-coefficient and only the statistically significant values, evaluated by Fisher’s exact test (P < 0.05), were considered.
As a result of investigation were found four new ruderal associations (Descurainietum sophiae, Hordeo murini-Brometum sterilis, Linario-Brometum tectorum and Aegilopsietum cylindricae) for Bulgarian vegetation. Descurainietum sophiae association is typical for areas with nitrophilization, while the other three associations occur within agrocoenoses, other anthropogenic territories or in altered grasslands.

Keywords: ecology; new associations; syntaxonomy; ruderal vegetation

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