Figure 1:
Locations of the investigated plots in Kharkiv city: 1 – Kharkiv city area; 2 – The Lopan River; 3 – The Udy River; 4 – The Kharkiv River.
Slika 1: Lokacije raziskanih ploskev v mestu Harkov: 1 – območje mesta Harkov; 2 – reka Lopan; 3 – reka Udy; 4 – reka Harkov.
Table 1:
Studied locations of water bodies in Kharkiv.
Tabela 2: Preuèevane lokacije vodnih teles v Harkovu.
| Number of location | Type of water body | Date | Water temperature, °C | The presence of alien species | Geographical coordinates | |
|---|---|---|---|---|---|---|
| Longitude | Latitude | |||||
| 1 | Udy river | 19.09.2014 | 24 | Pistia stratiotes (projective cover 25%) | 36°09′59.8″E | 49°57′25.1″N |
| 2 | Udy river | 19.09.2014 | 24 | Pistia stratiotes (projective cover 15%) | 36°10′07.4″E | 49°57′23.2″N |
| 3 | Zhovtneve Reservoir | 19.09.2014 | 23 | Pistia stratiotes (projective cover 25 %) | 36°09′57.1″E | 49°57′26.9″N |
| 4 | Kharkiv river | 20.08.2016 | 22 | Pistia stratiotes (projective cover 40%) | 36°14′36.6″E | 49°59′32.9″N |
| 5 | Kharkiv river | 30.09.2020 | 14 | Pistia stratiotes (projective cover 35%) | 36°14′40.0″E | 49°59′33.4″N |
| 6 | Lopan river | 6.09.2021 | 18 | Pistia stratiotes (projective cover 30%), Pontederia crassipes (projective cover 5%) | 36°12′26.6″E | 50°00′40.6″N |
| 7 | Lopan river | 6.09.2021 | 18 | Pistia stratiotes (projective cover 5%), Pontederia crassipes (projective cover 5%) | 36°12′19.9″E | 50°00′47.0″N |
| 8 | Lopan river | 6.09.2021 | 18 | Pistia stratiotes (projective cover 5%), Pontederia crassipes (projective cover 10%) | 36°12′02.0″E | 50°01′03.5″N |
| 9 | Lopan river | 6.09.2021 | 19 | Pistia stratiotes (projective cover 5%), Pontederia crassipes (projective cover 15%) | 36°12′02.9″E | 50°01′01.8″N |
| 10 | Lopan river | 6.09.2021 | 18 | Pistia stratiotes (projective cover 45%), Pontederia crassipes (projective cover 15%) | 36°11′45.2″E | 50°01′19.1″N |
Figure 2:
Aquatic plant communities with present alien species Pistia stratiotes L. and Pontederia crassipes Mart.: A) the Udy River (19. 9. 2014); B) the Kharkiv River (20. 8. 2016); C) the Lopan River (6. 9. 2021); D) the Lopan River (6. 9. 2021).
Slika 2: Vodne rastlinske združbe s prisotnima tujerodnima vrstama Pistia stratiotes L. in Pontederia crassipes Mart.: A) reka Udy (19. 9. 2014); B) reka Harkov (20. 8. 2016); C) reka Lopan (6. 9. 2021); D) reka Lopan (9. 6. 2021).
Figure 3:
Zone of tolerance of plant communities in the hyperspace of Didukh's ecological indicator values: A) with Pistia stratiotes; B) with Pistia stratiotes and Pontederia crassipes
Legend: Hd – soil humidity, fH – variability of soil humidity, Rc – acidity, Sl – total salt regime, Ca – carbonate content, Nt – nitrogen content, Ae – soil aeration, Tm – the radiation balance (thermal climate), Om – the aridity or humidity of climate (ombroregime), Kn – continentality of climate, Cr – the rigours of winter (cryoclimate), Lc – light.
Slika 3: Cona tolerance rastlinskih združb v hiperprostoru vrednosti Didukhovih ekoloških indikatorskih vrednosti: A) z vrsto Pistia stratiotes; B) z vrstama Pistia stratiotes in Pontederia crassipes
Legenda: Hd – vlažnost tal, fH – variabilnost vlažnosti tal, Rc – kislost, Sl – skupni režim soli, Ca – vsebnost karbonatov, Nt – vsebnost dušika, Ae – zračnost tal, Tm – sevalna bilanca (toplota podnebja), Om – suhost ali vlažnost podnebja (ombrorežim), Kn – celinskost podnebja, Cr – ostrina zime (krioklima), Lc – svetloba.
Table 2:
Ecological indicator values of studied plant communities according to twelve indicators.
Tabela 2: Vrednosti dvanajstih ekoloških indikatorskih vrednosti raziskovanih rastlinskih združb.
| Environmental factors | Plant communities with participation | Plant communities with participation | ||||||
|---|---|---|---|---|---|---|---|---|
| Pistia stratiotes | Pistia stratiotes and Pontederia crassipes | |||||||
| Mean | Minimum | Maximum | Std. Dev. | Mean | Minimum | Maximum | Std. Dev. | |
| Hd | 20,13 | 20,00 | 20,30 | 0,15 | 17,48 | 14,50 | 19,30 | 1,86 |
| fH | 2,90 | 2,60 | 3,30 | 0,36 | 5,68 | 4,80 | 8,00 | 1,33 |
| Rc | 8,43 | 8,00 | 9,10 | 0,59 | 8,10 | 7,60 | 8,70 | 0,51 |
| Sl | 8,83 | 8,60 | 9,00 | 0,21 | 7,94 | 7,20 | 8,60 | 0,60 |
| Ca | 6,17 | 5,70 | 6,60 | 0,45 | 5,34 | 4,40 | 6,10 | 0,67 |
| Nt | 7,30 | 6,70 | 8,00 | 0,66 | 7,44 | 6,70 | 8,00 | 0,57 |
| Ae | 11,90 | 10,50 | 13,30 | 1,40 | 11,34 | 10,00 | 13,00 | 1,09 |
| Tm | 7,97 | 6,70 | 9,60 | 1,48 | 8,46 | 7,70 | 9,40 | 0,66 |
| Om | 8,83 | 7,90 | 10,20 | 1,21 | 10,48 | 9,50 | 11,20 | 0,90 |
| Kn | 7,90 | 7,10 | 8,80 | 0,85 | 8,64 | 7,90 | 9,20 | 0,47 |
| Cr | 6,97 | 6,30 | 7,50 | 0,61 | 7,92 | 7,30 | 8,70 | 0,61 |
| Lc | 7,20 | 6,90 | 7,40 | 0,26 | 7,54 | 7,10 | 8,00 | 0,38 |