Abstract Dry grassland vegetation on fluvial terraces along middle reaches of river Piave and river Brenta in Northeastern high Po plain were investigated through a phytosociological approach. Comparisons with ecologically analogous communities described from neighbouring territories lead to the description of a new association belonging to Centaureion dichroanthae alliance: Astragalo onobrychidis-Koelerietum pyramidatae. Residual fragments of Chrysopogon gryllus-dominated grassland on slighly deeper soils are refered to Chamaecytiso hirsuti-Chrysopogonetum grylli.
{"title":"Dry grasslands on fluvial terraces of the middle reaches of river Piave in the North East Italy","authors":"S. Tasinazzo, K. Zanatta, C. Lasen, R. Fiorentin","doi":"10.2478/hacq-2021-0017","DOIUrl":"https://doi.org/10.2478/hacq-2021-0017","url":null,"abstract":"Abstract Dry grassland vegetation on fluvial terraces along middle reaches of river Piave and river Brenta in Northeastern high Po plain were investigated through a phytosociological approach. Comparisons with ecologically analogous communities described from neighbouring territories lead to the description of a new association belonging to Centaureion dichroanthae alliance: Astragalo onobrychidis-Koelerietum pyramidatae. Residual fragments of Chrysopogon gryllus-dominated grassland on slighly deeper soils are refered to Chamaecytiso hirsuti-Chrysopogonetum grylli.","PeriodicalId":39239,"journal":{"name":"Hacquetia","volume":"21 1","pages":"15 - 40"},"PeriodicalIF":0.5,"publicationDate":"2022-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42884622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The very little-known Quercus ×numidica Trabut, recently typified and synonymised to Q. ×kabylica Trabut, was found within the Cynosuro peltierii-Quercetum afaredis Laribi ex El Mokni ass. nov. (Quercion suberis Loisel 1971). Both the taxon and the syntaxon are described here for the first time for the oak forests of Kroumiria in Tunisia. The distribution, ecology and field photographs of the new taxon are presented and IUCN Red List assessment is provided in this paper. Threats at the national level are assessed and conservation measures for the taxon are proposed.
摘要在Cynosuro peltierii-Quercetum afaredis Laribi ex El Mokni assa . 11 . (Quercion suberis Loisel 1971)中发现了鲜为人知的Quercus ×numidica Trabut，最近被归类为Q. ×kabylica Trabut。本文首次描述了突尼斯Kroumiria橡树林的分类群和句法群。本文介绍了该新分类群的分布、生态和野外照片，并对其红色名录进行了评价。对国家层面的威胁进行了评估，并提出了保护措施。
{"title":"Quercus ×numidica Trabut (Fagaceae, Quercoideae) and Cynosuro peltierii-Quercetum afaredis Laribi ex El Mokni ass. nov. new taxon and syntaxon to Kroumirian oak forests of Tunisia with remarks on their ecology and conservation","authors":"R. Mokni","doi":"10.2478/hacq-2021-0022","DOIUrl":"https://doi.org/10.2478/hacq-2021-0022","url":null,"abstract":"Abstract The very little-known Quercus ×numidica Trabut, recently typified and synonymised to Q. ×kabylica Trabut, was found within the Cynosuro peltierii-Quercetum afaredis Laribi ex El Mokni ass. nov. (Quercion suberis Loisel 1971). Both the taxon and the syntaxon are described here for the first time for the oak forests of Kroumiria in Tunisia. The distribution, ecology and field photographs of the new taxon are presented and IUCN Red List assessment is provided in this paper. Threats at the national level are assessed and conservation measures for the taxon are proposed.","PeriodicalId":39239,"journal":{"name":"Hacquetia","volume":"21 1","pages":"153 - 161"},"PeriodicalIF":0.5,"publicationDate":"2022-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41459000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Polygonum samsunicum is one of the endemic species from Turkey. Up to now, it has been only known from the type locality (Samsun /Ladik). This research intends to define the global conservation status and strategies of locally distributed endemic P. samsunicum which has been confronted with the danger of extinction due to anthropogenic effects in recent years. In this research, we did extensive field studies and collected all needed data for determining the precise conservation status of P. samsunicum. We reported nine additional populations from Upper Tersakan valley, where the Mediterranean climate is dominant, and the size of populations, altitude, coordinates, habitat types, and the threats it faces in each locality were given. GeoCAT analyses at global levels indicate the grade of occurrence 21.609 km2 and area of occupancy 10.094 km2 and there could be an inferred decline due to habitat loss and fragmentation of the original population, suggesting local endemic species might be classified as CR, based on criteria B1ab (i, ii, iii) + 2ab (i, ii, iii) in the Red List categorization. Its parts are also consumed by local people due to its medicinal features. For in-situ conservation, phenological life history and detailed ecological studies, as well as population monitoring and ex-situ conservation studies should be continued together. Establishing cooperation between universities, research institutes, and local management authorities is strongly needed for long-term monitoring of population size, distribution, overgrazing, and public awareness.
{"title":"Conservation Assessment of a critically endangered endemic Polygonum samsunicum (Polygonaceae) with emended description from Turkey","authors":"Fergan Karaer, F. Celep, A. Celep, H. Kutbay","doi":"10.2478/hacq-2021-0027","DOIUrl":"https://doi.org/10.2478/hacq-2021-0027","url":null,"abstract":"Abstract Polygonum samsunicum is one of the endemic species from Turkey. Up to now, it has been only known from the type locality (Samsun /Ladik). This research intends to define the global conservation status and strategies of locally distributed endemic P. samsunicum which has been confronted with the danger of extinction due to anthropogenic effects in recent years. In this research, we did extensive field studies and collected all needed data for determining the precise conservation status of P. samsunicum. We reported nine additional populations from Upper Tersakan valley, where the Mediterranean climate is dominant, and the size of populations, altitude, coordinates, habitat types, and the threats it faces in each locality were given. GeoCAT analyses at global levels indicate the grade of occurrence 21.609 km2 and area of occupancy 10.094 km2 and there could be an inferred decline due to habitat loss and fragmentation of the original population, suggesting local endemic species might be classified as CR, based on criteria B1ab (i, ii, iii) + 2ab (i, ii, iii) in the Red List categorization. Its parts are also consumed by local people due to its medicinal features. For in-situ conservation, phenological life history and detailed ecological studies, as well as population monitoring and ex-situ conservation studies should be continued together. Establishing cooperation between universities, research institutes, and local management authorities is strongly needed for long-term monitoring of population size, distribution, overgrazing, and public awareness.","PeriodicalId":39239,"journal":{"name":"Hacquetia","volume":"21 1","pages":"197 - 209"},"PeriodicalIF":0.5,"publicationDate":"2022-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42266351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Lebeda, E. Křístková, C. Khoury, Daniel Carver, Chrystian C. Sosa
Abstract Wild lettuces (Lactuca L.) provide valuable genetic resources for crop breeding, but are also significant invasive weeds. We explored the distributions, habitats, and ecological characteristics of populations of wild Lactuca species in central Chile. We documented two species – Lactuca serriola L. (prickly lettuce) and Lactuca virosa L. (opium/bitter lettuce) in 204 localities. These observations indicate that: i) both allochthonous (Euroasian) Lactuca species occur and are able to regenerate in central Chile; ii) L. serriola forms dense populations in urbanized areas; iii) both species can expand along transport corridors to high elevations; iv) the spread of L. virosa and persistence of dense populations in elevations above 2,000 m a.s.l. prove the invasiveness of this species in extreme climates; v) both species may contain novel traits of interest for germplasm conservation.
{"title":"Distribution and ecology of wild lettuces Lactuca serriola L. and Lactuca virosa L. in central Chile","authors":"A. Lebeda, E. Křístková, C. Khoury, Daniel Carver, Chrystian C. Sosa","doi":"10.2478/HACQ-2021-00191","DOIUrl":"https://doi.org/10.2478/HACQ-2021-00191","url":null,"abstract":"Abstract Wild lettuces (Lactuca L.) provide valuable genetic resources for crop breeding, but are also significant invasive weeds. We explored the distributions, habitats, and ecological characteristics of populations of wild Lactuca species in central Chile. We documented two species – Lactuca serriola L. (prickly lettuce) and Lactuca virosa L. (opium/bitter lettuce) in 204 localities. These observations indicate that: i) both allochthonous (Euroasian) Lactuca species occur and are able to regenerate in central Chile; ii) L. serriola forms dense populations in urbanized areas; iii) both species can expand along transport corridors to high elevations; iv) the spread of L. virosa and persistence of dense populations in elevations above 2,000 m a.s.l. prove the invasiveness of this species in extreme climates; v) both species may contain novel traits of interest for germplasm conservation.","PeriodicalId":39239,"journal":{"name":"Hacquetia","volume":"21 1","pages":"173 - 186"},"PeriodicalIF":0.5,"publicationDate":"2021-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45550157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Proboscidea louisianica (Miller) Thell. (Martyniaceae) is newly reported for the flora of Tunisia and North Africa as a naturalised alien. Extensive field investigations in northern Tunisia allowed the discovery of three populations of P. louisianica (Miller) Thell. consisting of 18 individuals found at the edges of “Oued Béja” and at roadside within an irrigated land in Nabeul region, where plant specimens were in flowers and fruits. Moreover, further sites were recorded for another member of the family Martyniaceae (Ibicella lutea (Lindl.) Van Eselt.), already reported and known in Tunisia and Algeria within North Africa. Additional information for both species on their current distribution areas and their habits are provided. Details of their morphological and distinguishing features are illustrated.
{"title":"Further records and new data on the occurrence of Martyniaceae in Tunisia and North Africa","authors":"R. Mokni","doi":"10.2478/hacq-2021-0016","DOIUrl":"https://doi.org/10.2478/hacq-2021-0016","url":null,"abstract":"Abstract Proboscidea louisianica (Miller) Thell. (Martyniaceae) is newly reported for the flora of Tunisia and North Africa as a naturalised alien. Extensive field investigations in northern Tunisia allowed the discovery of three populations of P. louisianica (Miller) Thell. consisting of 18 individuals found at the edges of “Oued Béja” and at roadside within an irrigated land in Nabeul region, where plant specimens were in flowers and fruits. Moreover, further sites were recorded for another member of the family Martyniaceae (Ibicella lutea (Lindl.) Van Eselt.), already reported and known in Tunisia and Algeria within North Africa. Additional information for both species on their current distribution areas and their habits are provided. Details of their morphological and distinguishing features are illustrated.","PeriodicalId":39239,"journal":{"name":"Hacquetia","volume":"20 1","pages":"273 - 280"},"PeriodicalIF":0.5,"publicationDate":"2021-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46727525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Cyperus esculentus (yellow nutsedge) is an alien species that started to spread in arable fields in Slovenia and has already become a noxious weed. In this study we present the spatio-temporal pattern of this invasion in Slovenia. Species was first recorded in 1980 and currently two hotspots are evident (Ljubljana Basin and Posočje). Habitat preferences of Cyperus esculentus and the floristic compostion of invaded plant communities were studied. These communites were compared to similar communities in Slovenia and to so far described vegetation types with dominating Cyperus esculentus in Europe. Based on these analyses we described new weed association, namely Digitario sanguinalis-Cyperetum esculenti.
{"title":"Invasion, distribution and habitat affiliation of Cyperus esculentus, a new weed in Slovenia","authors":"B. Vreš, U. Šilc","doi":"10.2478/hacq-2021-0012","DOIUrl":"https://doi.org/10.2478/hacq-2021-0012","url":null,"abstract":"Abstract Cyperus esculentus (yellow nutsedge) is an alien species that started to spread in arable fields in Slovenia and has already become a noxious weed. In this study we present the spatio-temporal pattern of this invasion in Slovenia. Species was first recorded in 1980 and currently two hotspots are evident (Ljubljana Basin and Posočje). Habitat preferences of Cyperus esculentus and the floristic compostion of invaded plant communities were studied. These communites were compared to similar communities in Slovenia and to so far described vegetation types with dominating Cyperus esculentus in Europe. Based on these analyses we described new weed association, namely Digitario sanguinalis-Cyperetum esculenti.","PeriodicalId":39239,"journal":{"name":"Hacquetia","volume":"20 1","pages":"291 - 302"},"PeriodicalIF":0.5,"publicationDate":"2021-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43767583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Lluga-Rizani, D. Šoljan, Naim Berisha, K. Kurteshi, K. Letaj
Abstract The subject of our research was Trifolium repens L. The aim was to assess the level of morphological and anatomical variability among populations from different habitats (meadows, roadsides, subalpine slopes) and different altitudes (891–1881 m) in Brezovica (Sharri Mountain, Kosovo). The investigation covered 26 morphological and anatomical traits in populations from 12 locations. From the results obtained during this research, it can be concluded that there is a significant difference among populations for most micro- and macro-morphological traits. There is also a tendency towards a reduction of most of the average values of the investigated parameters (total plant height, total leaf length, leaf petiole length, peduncle length, fruit weight, number of flowers in an inflorescence, stomata length on the upper leaf surface, and diameter of collateral bundle) in relation to altitude increase. However, trichome length showed consistency and was not affected by habitat and altitude changes. The results also lead to a proposal for taxonomic revision of this taxon.
{"title":"Morphological variability of Trifolium repens L. (Fabaceae)","authors":"K. Lluga-Rizani, D. Šoljan, Naim Berisha, K. Kurteshi, K. Letaj","doi":"10.2478/hacq-2021-0009","DOIUrl":"https://doi.org/10.2478/hacq-2021-0009","url":null,"abstract":"Abstract The subject of our research was Trifolium repens L. The aim was to assess the level of morphological and anatomical variability among populations from different habitats (meadows, roadsides, subalpine slopes) and different altitudes (891–1881 m) in Brezovica (Sharri Mountain, Kosovo). The investigation covered 26 morphological and anatomical traits in populations from 12 locations. From the results obtained during this research, it can be concluded that there is a significant difference among populations for most micro- and macro-morphological traits. There is also a tendency towards a reduction of most of the average values of the investigated parameters (total plant height, total leaf length, leaf petiole length, peduncle length, fruit weight, number of flowers in an inflorescence, stomata length on the upper leaf surface, and diameter of collateral bundle) in relation to altitude increase. However, trichome length showed consistency and was not affected by habitat and altitude changes. The results also lead to a proposal for taxonomic revision of this taxon.","PeriodicalId":39239,"journal":{"name":"Hacquetia","volume":"20 1","pages":"281 - 290"},"PeriodicalIF":0.5,"publicationDate":"2021-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43830494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sindhu Arya, D. Iamonico, Venugopalan Nair Saradamma Anil Kumar
Abstract Three populations of Amaranthus powellii were discovered in Kerala region (SE-India), representing the first record of this species for the national flora. A morphological description based on the Indian plants, as well as ecological data are given. A preliminary list of all the Amaranthus species occurring in India, which was never published during the last 136 years, is also provided.
{"title":"Amaranthus powellii (Amaranthaceae), a new addition for the flora of India and a preliminary list of the Indian Amaranthus species","authors":"Sindhu Arya, D. Iamonico, Venugopalan Nair Saradamma Anil Kumar","doi":"10.2478/hacq-2021-0005","DOIUrl":"https://doi.org/10.2478/hacq-2021-0005","url":null,"abstract":"Abstract Three populations of Amaranthus powellii were discovered in Kerala region (SE-India), representing the first record of this species for the national flora. A morphological description based on the Indian plants, as well as ecological data are given. A preliminary list of all the Amaranthus species occurring in India, which was never published during the last 136 years, is also provided.","PeriodicalId":39239,"journal":{"name":"Hacquetia","volume":"20 1","pages":"257 - 262"},"PeriodicalIF":0.5,"publicationDate":"2021-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46432294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Using hierarchical clustering with unweighted pair-group method with arithmetic mean (UPGMA) we arranged 603 phytosociological relevés of beech forests on the present upper forest line, mainly from the Julian Alps and the Trnovo Forest Plateau (we also included the relevés from the Karawanks and the Kamnik Alps), into 32 clusters. Based on their analysis and comparison with previously described similar (alti)montane-subalpine beech communities we classified most of the relevés into the association Polysticho lonchitis-Fagetum and its new subassociations ericetosum carneae, cardaminetosum trifoliae, luzuletosum niveae, luzuletosum luzuloidis, calamagrostietosum variae, allietosum victorialis, adoxetosum moschatellinae, stellarietosum nemorum and several new variants. The altitude of the studied stands is predominantly 1400 to 1550 m (the upper line is at 1660 m); they occur at all aspects, frequently on steep and very steep slopes, mainly on limestone and dolomite limestone, the predominant soil type is rendzina. These stands are species rich (on average 61 species per relevé, altogether more than 500 vascular plants) and have many species in common with the stands of associations Rhododendro hirsuti-Fagetum and Rhodothamno-Laricetum.
{"title":"Vegetation analysis of the subalpine beech forest on the upper forest line in the Julian Alps (NW Slovenia and NW Italy) and in the northern Dinaric Alps","authors":"I. Dakskobler, A. Rozman","doi":"10.2478/hacq-2021-0013","DOIUrl":"https://doi.org/10.2478/hacq-2021-0013","url":null,"abstract":"Abstract Using hierarchical clustering with unweighted pair-group method with arithmetic mean (UPGMA) we arranged 603 phytosociological relevés of beech forests on the present upper forest line, mainly from the Julian Alps and the Trnovo Forest Plateau (we also included the relevés from the Karawanks and the Kamnik Alps), into 32 clusters. Based on their analysis and comparison with previously described similar (alti)montane-subalpine beech communities we classified most of the relevés into the association Polysticho lonchitis-Fagetum and its new subassociations ericetosum carneae, cardaminetosum trifoliae, luzuletosum niveae, luzuletosum luzuloidis, calamagrostietosum variae, allietosum victorialis, adoxetosum moschatellinae, stellarietosum nemorum and several new variants. The altitude of the studied stands is predominantly 1400 to 1550 m (the upper line is at 1660 m); they occur at all aspects, frequently on steep and very steep slopes, mainly on limestone and dolomite limestone, the predominant soil type is rendzina. These stands are species rich (on average 61 species per relevé, altogether more than 500 vascular plants) and have many species in common with the stands of associations Rhododendro hirsuti-Fagetum and Rhodothamno-Laricetum.","PeriodicalId":39239,"journal":{"name":"Hacquetia","volume":"20 1","pages":"373 - 564"},"PeriodicalIF":0.5,"publicationDate":"2021-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45449208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Protopopova, Y. Didukh, V. Tkachenko, M. Shevera, O. Kucher, L. Zavialova, A. P. Biatov
Abstract Grindelia squarrosa (Pursh) Dunal. (Asteraceae) is a species with high invasiveness capacity in Ukraine, especially in the Steppe zone. The first data on the finding of escaped plants in Europe were recorded in the 40’s of the last century. There were three naturalization centres in Ukraine, from where the species began to spread. In the secondary range in Ukraine, G. squarrosa is characterized by high levels of seed productivity and germination, variable modes of dispersal, wide ecological and coenotic amplitudes and CSR-strategy. The trend continues with the spread of the species in western, north-western and northern directions, and today more than 300 localities confirming this trend are already known. In the past 20 years, 92 new localities have been recorded. G. squarrosa is a transformer, widespread in the southern regions of the Steppe zone. As a result, new plant communities are formed. In general, this species is recorded in communities of five vegetation classes. In terms of ecological indicators, the optimum of the species is in the Steppe zone. It can be predicted that, due to the potential ability of the species to adapt and under the influence of climatic change, there is a higher probability that the species will spread in the future in northern and western directions. The condition for such an expansion is disturbance of meadow-steppe fringe xeromesic communities, with decreased coenotic competition.
{"title":"Grindelia squarrosa in Ukraine: current distribution and ecological and coenotic peculiarities","authors":"V. Protopopova, Y. Didukh, V. Tkachenko, M. Shevera, O. Kucher, L. Zavialova, A. P. Biatov","doi":"10.2478/hacq-2021-0014","DOIUrl":"https://doi.org/10.2478/hacq-2021-0014","url":null,"abstract":"Abstract Grindelia squarrosa (Pursh) Dunal. (Asteraceae) is a species with high invasiveness capacity in Ukraine, especially in the Steppe zone. The first data on the finding of escaped plants in Europe were recorded in the 40’s of the last century. There were three naturalization centres in Ukraine, from where the species began to spread. In the secondary range in Ukraine, G. squarrosa is characterized by high levels of seed productivity and germination, variable modes of dispersal, wide ecological and coenotic amplitudes and CSR-strategy. The trend continues with the spread of the species in western, north-western and northern directions, and today more than 300 localities confirming this trend are already known. In the past 20 years, 92 new localities have been recorded. G. squarrosa is a transformer, widespread in the southern regions of the Steppe zone. As a result, new plant communities are formed. In general, this species is recorded in communities of five vegetation classes. In terms of ecological indicators, the optimum of the species is in the Steppe zone. It can be predicted that, due to the potential ability of the species to adapt and under the influence of climatic change, there is a higher probability that the species will spread in the future in northern and western directions. The condition for such an expansion is disturbance of meadow-steppe fringe xeromesic communities, with decreased coenotic competition.","PeriodicalId":39239,"journal":{"name":"Hacquetia","volume":"20 1","pages":"263 - 272"},"PeriodicalIF":0.5,"publicationDate":"2021-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43907428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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