Cenchrus longispinus (Hack.) Fernald on anthropogenicly transformed areas of the Dniester district
Вантажиться...
Дата
2022
Науковий керівник
Укладач
Редактор
Назва журналу
ISSN
E-ISSN
Назва тому
Видавець
Одеський національний університет імені І. І. Мечникова
Анотація
Problem. The adventive species Cenchrus longispinus (Hack.) Fernald in Ukraine
is at the expansion stage. It poses significant potential threat to the environment
due to stress tolerance, wide ecological amplitude, high degree of naturalization,
significant coenotic activity and so on. Much attention is now being paid to the study
of the conditions for the emergence and naturalization of new adventitious species,
especially quarantine ones.
Cenchrus longispinus originates from North America and is distributed with grain
bulks. The species has spread to many countries – it has been found in South Africa,
India, Moldova, Russia, in a number of European countries. Навести яких.
In Ukraine, the species was first detected in the southern regions. It is a kenophyte,
agrio-epecophyte
and belongs to the quarantine organisms that are partially
distributed in Ukraine (A‑2). In the ecological sense, the species prefers arid soil
conditions. It is a heliophyte, in ecological and coenotic terms – a psammophyte.
Most of its populations are concentrated in anthropogenic ecotopes.
Methods. In the summer of 2021, anthropogenically transformed areas of the
Dniester embankment were surveyed by a route method. The flora of the railway
tracks between the railway stations Karolinа-Bugas
and Sonyachna was studied.
Results. 14 localities of Cenchrus longispinus were identified. Their coordinates
are given in the publication. Plants are mostly localized in areas of unauthorized or
organised pedestrian crossings over railway tracks. The substrate is crushed stone of
railway tracks or adjacent sandy soil.
Conclusions. On sand plants, by sight, are better developed, have more lateral
shoots, are higher. On the crushed stone substrate of railway tracks, especially in
the interrail space, the plants are low – 7 (10) cm high. Specimens on both types
of substrate, even those that undergo moderate and severe mechanical damage by
pedestrians, possess a significant number of grown additional shoots. Almost all
shoots have developed fruit.
Cenchrus longispinus on the Dniester embankment is represented not only in areas
with strong anthropogenic impact, but also where human influence is moderate or
apparently nonexistent. However, all surveyed areas are visited by pedestrians or
vacationers.
Опис
Ключові слова
Cenchrus longispinus, railway tracks, Dniester embankment, Cenchrus longispinus, залізничні колії, Дністровський пересип
Бібліографічний опис
Вісник Одеського національного університету = Odesa National University Herald