Rhizoclonium riparium (Roth) Harvey: a cryptogenic species with an invasive behaviour in Reyðarfjörður, Iceland

2020 ◽  
Vol 38 (12) ◽  
Author(s):  
Joana Micael ◽  
Pedro Rodrigues ◽  
Sindri Gíslason
Keyword(s):  
Cryptogenic Species

scholarly journals Introduced and cryptogenic species and their management in Paranaguá Bay, Brazil

2008 ◽  
Vol 51 (3) ◽  
pp. 623-633 ◽  
Author(s):  
Carolina Somaio Neves ◽  
Rosana Moreira da Rocha
Keyword(s):  
Management Practices ◽  
Local Community ◽  
Management Strategies ◽  
Population Monitoring ◽  
Negative Effects ◽  
Paranaguá Bay ◽  
Cryptogenic Species ◽  
Information Database ◽  
Hard Substrates ◽  
Underwater Structures

The aim of this work was to identify the introduced and cryptogenic species in encrusting and associated communities of hard substrates in Paranaguá Bay, Brazil, and to attempt to determine which of these species could negatively affect the local community to suggest management strategies for these species. At least four introduced species were found - a large number in comparison with other port surveys. These were the hydrozoan Garveia franciscana Torrey, 1902, the polychaete Polydora cornuta Bosc, 1902, the barnacles Amphibalanus reticulatus (Utinoni, 1967) and Striatobalanus amaryllis Darwin, 1854, all with potentially harmful impacts. Of the 33 cryptogenic species, four were also listed in the literature as causing negative effects. We propose the following management practices: periodic cleaning of all underwater structures, population monitoring of invasive species and potential substrates, an information database of potential sources of introduction.

Alien True Bugs of Europe (Insecta: Hemiptera: Heteroptera)

Zootaxa ◽  
2008 ◽  
Vol 1827 (1) ◽  
pp. 1 ◽  
Author(s):  
WOLFGANG RABITSCH
Keyword(s):  
North America ◽  
Ornamental Plants ◽  
Unknown Origin ◽  
Arrival Rate ◽  
Taxonomic Composition ◽  
Invasion Success ◽  
Trophic Specialization ◽  
North West ◽  
Unintentional Introduction ◽  
Cryptogenic Species

This paper reviews the alien (non-native, non-indigenous, exotic) true bug (Heteroptera) species in Europe. Forty-two established alien Heteroptera are recognized, of which 12 species are alien to Europe (originating outside Europe: eight from North America, three from the Eastern Palaearctic, one from New Zealand), 24 species are alien within Europe (translocated within Europe), and six cryptogenic species are of unknown origin. Since 1990 an approximate arrival rate of 7 species per decade has been observed. A recent trend of increased introductions from North America to Europe is suggested. The most important pathway of alien Heteroptera is translocation as contaminants (49 %), usually with ornamental plants, followed by unintentional introduction through natural dispersal (unaided) across political borders within Europe (28 %), and translocation as stowaways within a transport vector (21 %). The taxonomic composition of the alien Heteroptera of Europe is dominated by Miridae (17 species, 40 %), Tingidae (8 species, 19 %), and Anthocoridae (5 species, 12 %), all of which are overrepresented compared to the native European Heteroptera fauna. More than half of the species are phytophagous (24 species, 57 %) and the advantage of trophic specialization in invasion success is discussed. Most species are currently known to occur in the Czech Republic (19 species) and Germany (17 species), followed by Western European countries (Belgium 15 sp., France and United Kingdom 14 sp. each, and Netherlands 13 sp.), resulting in an apparent (north)west–(south)east gradient probably reflecting horticultural tradition in Europe. No unambiguousevidence exists so far for negative ecological or economical impacts, but more research is needed to investigate possible effects. Introductions of alien Heteroptera to and within Europe will increase, and deserve further consideration.

Three new cryptogenic species in the tribes Polysiphonieae and Streblocladieae (Rhodomelaceae, Rhodophyta)

Phycologia ◽  
2017 ◽  
Vol 56 (6) ◽  
pp. 605-623 ◽  
Author(s):  
Pilar Díaz-Tapia ◽  
Ignacio Bárbara ◽  
Javier Cremades ◽  
Heroen Verbruggen ◽  
Christine A. Maggs
Keyword(s):  
Cryptogenic Species

scholarly journals Biodiversity changes along the Algerian coast (Southwest Mediterranean basin): from 1834 to 2017: A first assessment of introduced species

2018 ◽  
Vol 19 (1) ◽  
pp. 156
Author(s):  
SAMIR GRIMES ◽  
MOULOUD BENABDI ◽  
NADHERA BABALI ◽  
WAHID REFES ◽  
NAWAL BOUDJELLAL-KAIDI ◽  
...  
Keyword(s):  
Introduced Species ◽  
Mediterranean Basin ◽  
Marine Species ◽  
Southwestern Part ◽  
The Status ◽  
Algerian Coast ◽  
The Mediterranean ◽  
Cryptogenic Species ◽  
Biodiversity Changes ◽  
Asparagopsis Armata

“Introduced” species of the Algerian coast remains the most undocumented issue in the Mediterranean Sea. Only few studies were dedicated to Introduced species due to the lack of taxonomists. In-depth research on Introduced species along the Algerian coast should provide new data that could explain the spreading mechanisms in the southwestern part of the Mediterranean basin particularly near the Alboran Sea. Introduced species among other related research; of which the outcome is expected in the next few years, is in progress in the southwest Mediterranean basin. The aim of this work is to provide an inventory of available data pertaining to marine species “introduced” in Algerian waters, whether these species were introduced intentionally or accidentally. This large number of Introduced species records covers the period from 1834 to December 2017. Seventy “Introduced” species have been recorded along the Algerian coast, composed by 55.7% true aliens25.7 %  range expanding species, 15.7% cryptogenic species and 2,9% vagrant species, with a clear domination of fish (38.57%) and macroalgae (30%). Approximately 348 introduction events have been reported; 64,9 % of them belong to macroalgae and one sighting out of two is done in the central region. The distribution and the status of introduced species in Algeria were evaluated. In total, 20% of the Introduced species can be considered as established along the Algerian coast, in particular the macrophyta, Codium fragile and Ulva lactuca as well as the cryptogenic species, Oculina patagonica, while Asparagopsis armata, A. taxiformis and Caulerpa cylindracea are considered as invasive. 

Atlantic fishes in the Mediterranean: using biological traits to assess the origin of newcomer fishes

2020 ◽  
Vol 643 ◽  
pp. 133-143
Author(s):  
J Evans ◽  
E Arndt ◽  
PJ Schembri
Keyword(s):  
Fish Species ◽  
Global Environmental Change ◽  
The Body ◽  
Individual Species ◽  
Biological Traits ◽  
Depth Range ◽  
Long Distance ◽  
Biological Trait ◽  
The Mediterranean ◽  
Cryptogenic Species

Two important facets of global environmental change are alteration of climatic regimes and the introduction of alien species. From a biogeographical perspective, these 2 processes lead to very similar results: a change in the distribution of species. Here, we considered Atlantic fish species that are recent newcomers in the Mediterranean Sea, using biological traits to assess their origin. For this purpose, we first re-evaluated all records of Atlantic fish species in the Mediterranean (n = 103) to exclude those not considered recent newcomers (n = 33). Based on faunistic data, we classified the true newcomers into 4 origin categories: alien, vagrant, range-expansion or cryptogenic. Then, we compared biological traits of species we characterised as aliens (n = 7), vagrants (n = 14) or range-expanders (n = 23). Finally, we re-assessed the origin of cryptogenic species (n = 26) using multivariate discriminant analysis, measuring the distance of individual species to the centroids of aliens, vagrants or range-expanders, allowing us to infer their probable ‘mode of origin’. The body size, depth range, temperature range, habitat and ability to undertake long-distance migration were the most important traits that could be related to alien, vagrant or range-expanding fishes. It was possible to assign 10 cryptogenic species a specific origin category with reasonable confidence, while the remaining cryptogenic species combined trait values of different origin categories. These results indicate that biological trait analysis can be coupled with faunistic data to help assess the most likely origin of a newcomer species, thus informing management decisions.

An updated overview of the marine alien and cryptogenic species from the Egadi Islands Marine Protected Area (Italy)

2016 ◽  
Vol 47 (2) ◽  
pp. 469-480 ◽  
Author(s):  
Anna Maria Mannino ◽  
Manfredi Parasporo ◽  
Fabio Crocetta ◽  
Paolo Balistreri
Keyword(s):  
Protected Area ◽  
Marine Protected Area ◽  
Cryptogenic Species
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