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1

Impact of Agriculture Intensification on the Floristic Diversity of the Forest-Field Ecotone

100%

Skrajna T.

Polish Journal of Ecology

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2020

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tom Vol. 68, nr 1

47--66

EN

The aim of the research was to study 20-year changes in the floristic richness of the vegetation and soil diaspore bank of agroceonoses and adjacent midfield woodlots, as a result of the intensification of agricultural production, and the role of the ecotone in the preservation of field weeds. The studies were conducted in two periods, the first between 1996 and 1998 and the second between 2016 and 2018, on 12 permanent plots located in a transition zone between agroceonoses and woodlots. The width of the ecotone zone was determined with a linear transect that crossed both communities. The study of vegetation was conducted using the Braun-Blanquet method. During each period, soil diaspore reserves were determined. A large decrease of approximately 30% in the number of species was noted in the agroceonoses, while there were minor changes in the wood communities. With only slight variation during the research, floristic diversity of the soil diaspore bank in those habitats was poorer than vegetation diversity. The ecotone phytoceonoses had the highest species richness. They showed greater floristic similarity to the wood phytoceonoses than to agroceonoses. In the transition zone a clear boundary was observed, dividing those two communities. The ecotone was a refuge for field species, including rare and endangered ones. The species composition of the ecotone soil diaspore bank was poorer than the composition of the flora and showed greater similarity to the species diversity of the agroceonoses. Additionally, a significant relationship between species richness and habitat conditions was noted.

2

Ustępujące chwasty polne w uprawach zbóż ozimych gminy Kotuń

63%

Skrzyczyńska J. , Skrajna T. , Zakład Ekologii Rolniczej W. S. R.-P. w. S.

Acta Universitatis Lodziensis. Folia Botanica

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1998

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tom 13

PL

Wydano przy pomocy finansowej Uniwersytetu Łódzkiego oraz Komitetu Badań Naukowych

EN

This study compares results of observations of winter cereal cultures in the area of the Kotuń parish in two investigated periods (1979-1980 and 1989-1990). In cultures of rye, triticale and winter wheat, 124 species were recorded and investigated during the investigated period. Over 10 years the stability of occurrence and covering decreased in 34 species o f winter cultures. The species included very rare weeds, such as Agroslemma githago and Neslia paniculata, and many acid soil species, such as Scleranthus annuus, Anthemis arvensis, or Rumex acetosella. Plantago maior subsp. intermedia, Juncus hufonius and Filaginella uliginosa were species that have disappeared.

3

Floral diversity of plant communities in field balks

63%

Skrajna T. , Bogusz A.

Studia Quaternaria

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2020

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tom Vol. 37, Nr 1

45--50

EN

The aim of the research was to study the floristic richness of balks, i.e. uncultivated strips separating fields, and to research the dependence of plant communities there on habitat conditions and adjacent crops. The share of segetal species in those communities was also analysed. In the western part of the Siedlce Plateau 70 balks among intensively cultivated fields were examined in 2016–2018. The balks divided fields with corn, winter cereals and spring cereal mixtures. The research was conducted with the Braun-Blanquet method, with 110 phytosociological relevés results used as study material. The flora specified this way was analysed in terms of biological structure, forms of life, persistence, historical and geographical spectrum, species rarity and presence of invasive species. In addition, the interdependence between the species richness of balks and habitat conditions as well as the type of neighbouring crops was studied. Habitat conditions were established with the Ellenberg indicator values, based on indicative species and taking into account light, temperature, moisture, soil reaction and nitrogen content. The development and floristic diversity of balk plant communities as ecotone areas were largely influenced by a proximity of arable fields and habitat conditions, especially by soil moisture and the amount of nitrogen. Balk flora consisted of vascular plants with 161 species, mainly apophytes. Those were mostly perennial species, hemikryptophytes. Among the most common field weeds from the class of Stellarietea mediae, 25 species were identified in balks. There were 26 rare and endangered species and 14 species having the status of invasive taxa.