scholarly journals Opuntia puberula Hort. Vindob. ex. Preiffer, un nuevo taxón para la flora alóctona española.

2008 ◽  
Vol 33 ◽  
pp. 332-334
Author(s):  
Daniel Guillot Ortiz
Keyword(s):  
Alien Species ◽  
Alien Flora

Opuntia puberula Hort. Vindob. ex Pfeiffer, a new alien species in SpainPalabras clave. Alóctono, flora, Opuntia puberula.Keywords. Alien, flora, Opuntia puberula.

scholarly journals The alien flora of Sudan and South Sudan: taxonomic and biogeographical composition

2021 ◽  
Author(s):  
Ali Omer ◽  
Maha Kordofani ◽  
Haytham H. Gibreel ◽  
Petr Pyšek ◽  
Mark van Kleunen
Keyword(s):  
Alien Species ◽  
South Sudan ◽  
Plant Invasions ◽  
Life Forms ◽  
Alien Plants ◽  
African Countries ◽  
Alien Flora ◽  
Result Show ◽  
Perennial Herbs ◽  
Disturbed Habitats

AbstractStudies on plant invasions depend on local and regional checklists of the alien flora. However, global overview studies have shown that some regions, including many African countries, remain understudied in this regard. To contribute to filling this gap, here we present the first checklist of alien plants of Sudan and South Sudan (the Sudans). We analysed the taxonomic and geographical composition of the species on this list. Our result show that of the 113 alien species in Sudans (99 in Sudan and 59 in South Sudan), 92 (81.4%) are naturalized and 21 (18.6%) are just casual aliens. The number of naturalized species represent 2.2% of the total flora of the Sudans (4096). The alien species belong to 44 families and 85 genera, and many of them are native to Southern America and Northern America (85.8%). Annual and perennial herbs are the prevailing life forms in the alien flora of the Sudans (68.1%), and, among the casual species, perennial herbs are underrepresented whereas woody tree species are over-represented. Alien plants of the Sudans are mostly used for medicinal and environmental purposes globally. The naturalized plants predominantly occur in man-made disturbed habitats, such as agricultural and ruderal habitats. This first overview of the alien flora of the Sudans should stimulate further research and recording of the alien flora to better understand the drivers and consequences of alien plants in the Sudans.

scholarly journals Improving Checklists of Alien Plants with Digitised Herbarium Collections: The Example of D.R. Congo (Africa)

2021 ◽  
Author(s):  
Farzaneh Bordbar ◽  
Pierre Meerts
Keyword(s):  
Alien Species ◽  
Plant Species ◽  
Field Work ◽  
Sampling Effort ◽  
Alien Plant Species ◽  
Alien Plant ◽  
Widespread Species ◽  
Native Flora ◽  
Alien Flora ◽  
Herbarium Collections

Abstract The Democratic Republic of the Congo (D.R. Congo) represents a striking gap of knowledge on alien plant species. In this paper, we use digitised herbarium collections to assemble a checklist of alien plant species in D.R. Congo and to examine patterns in the alien flora. The new checklist comprises 426 alien species i.e., 182 (42.5%) casuals, 244 (57.5%) naturalised of which 80 (19% of aliens) are invasive. Discrepancies with previous databases are discussed. For many species in previous databases, we failed to find evidence for occurrence outside cultivation. A total of 158 taxa were not included in previous lists, 44 of which are new to D.R. Congo. Considering the size of the country and its rich native flora, the alien flora of D.R. Congo does not appear to be species rich. The alien flora is particularly rich in Fabaceae (15%) and in annual species (36%). America is by far the most important source continent (65%) and the proportion of annuals of American origin is particularly large among the most widespread species. Invasive success is discussed in terms of residence time. The very low number of new species records after 1960 is most likely accounted for by decreasing sampling effort. The results illustrate how herbarium collections can be used to critically revise existing checklists of alien species in tropical Africa. Field work is urgently needed to improve coverage of recent introductions and to monitor the status of alien species, especially in protected areas and around botanic gardens.

scholarly journals ANALYSIS OF THE ALIEN FLORA OF DNIPROPETROVSK PROVINCE

2016 ◽  
Vol 6 (3) ◽  
pp. 419-429 ◽  
Author(s):  
B. Baranoski ◽  
N. Khromykh ◽  
L. Karmyzova ◽  
I. Ivanko ◽  
Y. Lykholat
Keyword(s):  
Life History ◽  
Alien Species ◽  
Plant Invasion ◽  
Species Number ◽  
Positive Trend ◽  
Species Status ◽  
Anthropogenic Transformation ◽  
Alien Flora ◽  
Invasive Status ◽  
Total Species

<p>Plant invasion in the Northern Steppe Dnieper has a long history complicated by excessive anthropogenic transformation of territory. Alien species status, origin areas, life history, and invasive tendency of alien species in Dnipropetrovsk region were investigated. The presence of 286 alien species of 61 families was registered. Some 7 families had the greatest species diversity (156 alien species that was 55% of total species number); 30 families were represented by 2–9 alien species, and 24 families contained only 1 alien species. So, the current proportion of the alien species was almost 17% in the regional flora. Archaeophytes consist of 40% of the total alien species, while neophytes had more than 60%. The proportion of naturalized species amounted 58% from alien species, whereas the share of casual species was 42%. The greatest abundance of alien species was typical for <em>Brassicaceae</em>, <em>Asterasea</em>, and <em>Poaceae </em>(14, 13, and 9% of the total species number). We proved invasive status of 28 species and positive trend regard alien species ratio for last years. </p>

scholarly journals Patterns in the alien flora of the Democratic Republic of the Congo: a comparison of Asteraceae and Fabaceae

2020 ◽  
Vol 153 (3) ◽  
pp. 373-389
Author(s):  
Farzaneh Bordbar ◽  
Pierre Meerts
Keyword(s):  
Alien Species ◽  
Native Species ◽  
Life Form ◽  
Democratic Republic ◽  
Geographic Origin ◽  
Life Forms ◽  
Trait Divergence ◽  
Native Flora ◽  
Alien Flora ◽  
Republic Of The Congo

Background and aims – This work provides the first pattern analysis of the alien flora of the Democratic Republic of the Congo (D.R. Congo), using Asteraceae and Fabaceae as a case study. Methods – Based on herbarium collections, existing databases, and literature data, a database of 38 alien species of Asteraceae and 79 alien species of Fabaceae has been assembled. Patterns in the introduction pathway, phylogeny, life form, morpho-functional traits, geographic origin, and occurrence in D.R. Congo are explored. Key results – America is the main source continent in both families, but Asia is also an important donor of Fabaceae. Taxonomic spectrum discrepancies between the alien and the native flora reflect the continent of origin. Sixty-six percent of alien Asteraceae have been accidentally introduced, most of which being annual weeds of disturbed soil. In contrast, 90% of alien Fabaceae have been deliberately introduced for forestry, agriculture, or environmental purposes, most of which being phanerophytes. Traits were compared between pairs of congeneric alien and native species. For Asteraceae, a sharp discrepancy was found in the life form spectrum (aliens: mostly therophytes; natives: phanerophytes). For Fabaceae, alien species had larger leaves and larger pods compared to their native congeners. The number of specimens in collections was positively correlated with the time since the date of first collection for both families. The Guineo-Congolian region has the highest number of alien Fabaceae, while alien Asteraceae are overrepresented in the Zambezian region.Conclusions – Contrasting patterns between alien Asteraceae and Fabaceae in the flora of D.R. Congo in terms of life forms, trait divergence compared to the native flora, and occurrence, reflect the divergent biological attributes and relations to humans of the two families. The striking discrepancies between the two families call for analyses of patterns of alien flora at family level and warn against global generalisations.

Checklist of alien plant species in a natural protected area: Anaga Rural Park (Tenerife, Canary Islands); effect of human infrastructures on their abundance

2018 ◽  
Vol 151 (1) ◽  
pp. 142-152
Author(s):  
Ana B. Expósito ◽  
Antonio Siverio ◽  
Luis A. Bermejo ◽  
Eduardo Sobrino-Vesperinas
Keyword(s):  
Alien Species ◽  
Exotic Species ◽  
Plant Species ◽  
Canary Islands ◽  
Protected Area ◽  
Hot Spot ◽  
Alien Plant Species ◽  
Alien Plant ◽  
Laurel Forest ◽  
Alien Flora

Background and aims – Invasive alien (exotic) species are one of the most serious threats to the conservation of biodiversity on the planet. This is especially true on islands, given the fragility of their ecosystems and high levels of endemicity in both species and ecosystems. The problem is particularly acute in the Canary Islands, a biodiversity `hot spot´, where there is widespread high endemicity and unique biodiversity. This paper presents the first comprehensive inventory of alien plant species in Anaga Rural Park (ARP) (Tenerife, Canary Islands, Spain) a Natural Protected Area, currently proposed as a UNESCO Biosphere Reserve. Anaga is also outstanding for including a relict Tertiary era laurel-forest ecosystem that hosts a large number of palaeoendemics.Methods – Surveys were conducted along itineraries through the different ecosystems of ARP to determine the alien plant species in areas with different levels of human impact.Key results – Two hundred and sixteen alien species were identified, belonging to 53 families and 141 genera, especially concentrated in the most anthropic areas, noting the possibly competitive coexistence of aliens and local endemics of importance in the ecosystem. This is the first overall comprehensive study on the importance of alien species in ARP. Surveys confirmed how human infrastructure and activities significantly favour the presence and diversity of exotic species. Using multivariate statistical analysis, significant differences were found between the species diversity of alien flora and the proximity of anthropic areas. The presence of Cuscuta campestris Yunck was detected, being a second record for the Canaries and the first for ARP.Conclusions – A large number of alien plant species inhabit ARP, affecting all its ecosystems. This is largely the result of the human activities within it, and poses a risk to its conservation and the survival of numerous endemic taxa s. str.

Preliminary Data on Alien Flora from Oltenia – Romania

2013 ◽  
Vol 40 (1) ◽  
pp. 33-42
Author(s):  
Daniel Răduţoiu ◽  
Ion Stan
Keyword(s):  
Alien Species ◽  
Plant Species ◽  
Residence Time ◽  
Preliminary Data ◽  
Life Form ◽  
Alien Plant Species ◽  
Alien Plant ◽  
Vascular Flora ◽  
Alien Flora ◽  
Invasive Status

Abstract This paper presents the list of alien plant species from Oltenia (Romania). For each taxon we mentioned and analysed the life form, the invasive status and the residence time. The collected and presented data highlight the expansion of the area of some alien species not mentioned previously in this part of the country and also the presence of a new subspontaneous species in the vascular flora of Romania, namely Lagurus ovatus.

scholarly journals An Updated Checklist of The Alien Flora In a Mediterranean Region of Europe: The Case of Calabria (Southern Italy)

2021 ◽  
Author(s):  
Giovanni Spampinato ◽  
Valentina Lucia Astrid Laface ◽  
Giandomenico Posillipo ◽  
Ana Cano Ortiz ◽  
Ricardo Quinto Canas ◽  
...  
Keyword(s):  
Invasive Species ◽  
Alien Species ◽  
Mediterranean Region ◽  
Southern Italy ◽  
Invasive Alien Species ◽  
The Other ◽  
Vascular Flora ◽  
Calabria Region ◽  
Alien Flora ◽  
The One

Abstract An updated checklist of the Calabrian alien vascular flora is presented. The alien flora of the Calabria region (Southern Italy) representing almost 12% of the regional flora and comprises 381 alien taxa, among which there are 370 angiosperms, 9 gymnosperms and 2 ferns. In relation to the state of spread, 35 invasive alien species (IAS) have been identified (4 of these are included in the list of Union Concern, sensu Regulation (EU) no. 1143/2014) which represent 9% of the Calabrian alien flora.In the last years the alien flora in Calabria has increased: in particular, alien species have increased over a decade from 190 to the current 381 taxa. If on the one hand this is due to new introductions, resulting from the globalization that relentlessly affects the whole planet, on the other hand it is to be linked to awareness of the problem of alien species and the increasing intensity of research in recent decades. This study would provide a baseline for further advanced studies on the management of invasive species and on the invasion ecology.

scholarly journals Five new alien species in the flora of Montenegro: Coreopsis tinctoria Nutt., Ipomoea indica (Burm.) Merr., Lupinus × regalis Bergmans, Physalis angulata L., and Solidago canadensis L. and new possible threats to the biodiversity

2017 ◽  
Vol 76 (1) ◽  
pp. 98-102 ◽  
Author(s):  
Danijela Stešević ◽  
Nada Bubanja
Keyword(s):  
New Species ◽  
Alien Species ◽  
Environmental Protection ◽  
Solidago Canadensis ◽  
Coreopsis Tinctoria ◽  
Alien Flora ◽  
Physalis Angulata

Abstract The alien flora of Montenegro is enlarged by 5 new species: Coreopsis tinctoria, Ipomoea indica, Lupinus × regalis, Physalis angulata, and Solidago canadensis. All species are grown as ornamentals, and thus horticulture is considered the most possible pathway for their introduction. Nevertheless, in the case of Physalis angulata, the occurrence might have originated in the remains of picnic meals. In order to define the alien status of these species, monitoring is needed, and thus we propose including the species on the National List of Indicators in environmental protection. Special attention should be paid to the species with invasive potentials: Solidago canadensis, Ipomoea indica and Physalis angulata.

Biogeography of island floras in the Great Lakes. II. Plant dispersal

1989 ◽  
Vol 67 (6) ◽  
pp. 1803-1820 ◽  
Author(s):  
J. K. Morton ◽  
E. H. Hogg
Keyword(s):  
Great Lakes ◽  
Alien Species ◽  
Plant Species ◽  
Native Species ◽  
Vascular Plant ◽  
Species Dispersal ◽  
Alien Plant ◽  
Plant Dispersal ◽  
Alien Flora ◽  
Nesting Sites

Experimental and observational data were used to determine the adaptations for dispersal in each of the 335 vascular plant species in the flora of Barrier Island, a typical limestone island in the Great Lakes. Most have adaptations for more than one mode of dispersal. Adaptations for dispersal by water were found in 211 species (63% of the flora), and by birds in 205 species (61% of the flora); only 22 species (6.5% of the flora) do not appear to have effective adaptations for dispersal by either of these means. The other three modes of dispersal to these islands are by wind (14% of plant species), dispersal across snow and ice (10%), and by man (6%). Alien species (23% of the flora) show greater dependence on birds (85% of the alien species) and man (12% of the alien species) for dispersal than do native species (54 and 5%, respectively). Sea gulls, particularly the Herring Gull (Larus delawarensis Ord.), are the major factor in the introduction of the alien flora. The heavily disturbed habitats created in the nesting sites of both Herring and Ring-billed (Larus argentatus Pontoppidan) gulls favour the persistence of many alien plant species on these islands.

scholarly journals Alien flora of Oman: invasion status, taxonomic composition, habitats, origin, and pathways of introduction

2022 ◽  
Author(s):  
Annette Patzelt ◽  
Petr Pyšek ◽  
Jan Pergl ◽  
Mark van Kleunen
Keyword(s):  
Alien Species ◽  
Plant Species ◽  
Vascular Plant ◽  
Plant Invasions ◽  
Taxonomic Composition ◽  
Alien Plant Species ◽  
Alien Plant ◽  
Alien Flora ◽  
In The Wild ◽  
Status Assessment

AbstractWe present the first inventory and status assessment of the alien flora of Oman, mainly based on field data collected from 1998 to 2021. The study provides (i) a comprehensive account of alien vascular plant species occurring in the wild in Oman, with information on their taxonomic composition. For each species information is given on (ii) invasion status (casual, naturalized or invasive), biogeography, habitat and life-form characteristics, and pathways of introduction. Further, we (iii) explain the differences in the alien species composition in different parts of the country, and (iv) analyse the drivers of plant invasions in Oman. Out of the 111 alien species reported (7.7% of the total Oman vascular flora), 34 species are casuals and 77 naturalized; of the latter seven are considered invasive. The moderate number of alien plant species is likely a result of the country’s arid climate, with extremely high summer temperatures and low annual precipitation in most of its area, and the relatively long isolation of the country. The families richest in alien plant species are Fabaceae (17 species), Asteraceae (14 species) and Poaceae (12 species). More alien plants were found in northern Oman (82 species) than in southern Oman (60 species), and very few species are recorded from the central desert (7 species). The main habitats colonized were man-made habitats, either ruderal or agricultural. Most species alien to Oman are native to South America (49 species) or North America (43 species). This inventory provides a knowledge base for developing a national management strategy for alien vascular plants in Oman.

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