scholarly journals Seasonal and bathymetric effects on macrofouling invertebrates’ primary succession in a mediterraenan non-indigenous species hotspot area

2018 ◽  
Vol 19 (3) ◽  
pp. 572 ◽  
Author(s):  
MARCO LEZZI ◽  
ADRIANA GIANGRANDE
Keyword(s):  
Community Development ◽  
Species Interactions ◽  
Primary Succession ◽  
Mytilus Galloprovincialis ◽  
Abundant Species ◽  
Artificial Substrates ◽  
Indigenous Species ◽  
Central Mediterranean ◽  
Almost All ◽  
Non Indigenous Species

The present study investigates macrofouling development in the Mar Grande of Taranto (Central Mediterranean Sea), a wide confined area that has attracted considerable attention in recent years due to the establishment of numerous non-indigenous species (NIS). Different starting times of a yearly primary succession on artificial substrates were tracked so as to investigate the matching of the development pattern with contingency and/or convergence models, identifying NIS’s structural role in the community endpoint. Our results show that during the experiment all assemblages tended to converge towards multiple contingent communities according to starting times and depths. The differences are due to propagule availability which influence further species interactions. Thus the endpoint patterns are defined by a contingent community development determined by the seasonal species pool, their phenologies, pre- and post-settlement events, and species interactions. The most important structuring species was Mytilus galloprovincialis, which was present in almost all the endpoint assemblages, in particular when it recruits at early stages of the community development. Another abundant species at the endpoint was the alien Branchiomma boholense; which was a persistent structural component contributing to an alternative state in which Mytilus galloprovincialis loses its structural importance and where B. boholense becomes dominant, leading to an increase in fouling biodiversity of the endpoint assemblage.

scholarly journals Stationary substrates facilitate bioinvasion in Paranaguá Bay in southern Brazil

2010 ◽  
Vol 58 (spe3) ◽  
pp. 23-28 ◽  
Author(s):  
Rosana M. Rocha ◽  
Leonardo C. Cangussu ◽  
Mariana P. Braga
Keyword(s):  
Introduced Species ◽  
Artificial Substrates ◽  
Management Tool ◽  
Specific Substrate ◽  
Indigenous Species ◽  
Constant Depth ◽  
Fouling Communities ◽  
Paranaguá Bay ◽  
Non Indigenous Species ◽  
Stationary Plate

Artificial substrates in and near ports and marinas commonly have many non-indigenous species and are the first stepping stone for the establishment of bioinvasors. Substrate movement influences fouling communities and so understanding of how species assemblages are related to specific substrate conditions is crucial as a management tool. Here we describe the species assemblage of the community after six months of development on granite plates in Paranaguá Bay. Species richness was similar in the two treatments, with 12 species on floating (constant depth) plates and 15 on stationary (variable depth) plates. However, species composition differed, with the community on floating plates being dominated by the native bivalve Mytella charruana (66.1 ± 5.5% cover) and that on stationary plates dominated by the barnacles Fistulobalanus citerosum (49.8 ± 3.5% cover) and the introduced Amphibalanus reticulatus (33.9 ± 3.7% cover). Other introduced species were Garveia franciscana, on one stationary plate, and Megabalanus coccopoma also on one stationary plate and not very abundant on half of the floating plates (< 2%). Thus, stationary plates were more susceptible to introduced species that may become very abundant, suggesting that this type of substrate should be a priority in management for bioinvasion control. We also hypothesize that the native bivalve M. charruana is the dominant competitor for space on floating substrates, thereby reducing the invasiveness of that type of substrate.

scholarly journals First Record of Colonial Ascidian, Botrylloides diegensis Ritter and Forsyth, 1917 (Ascidiacea, Stolidobranchia, Styelidae), in South Korea

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2164
Author(s):  
Taekjun Lee ◽  
Sook Shin
Keyword(s):  
South Korea ◽  
First Record ◽  
Artificial Substrates ◽  
Indigenous Species ◽  
Colonial Ascidian ◽  
Mitochondrial Coi ◽  
Intraspecific Variations ◽  
Single Clade ◽  
Non Indigenous Species ◽  
Botrylloides Diegensis

Botrylloides species are important members of the fouling community colonizing artificial substrates in harbors and marinas. During monitoring in 2017–2020 of non-indigenous species in Korea, one colonial ascidian species was distinctly different from other native colonial ascidians, such as B. violaceus and Botryllus schlosseri, in South Korea. This species was identified as B. diegensis. DNA barcodes with mitochondrial COI were used to identify one-toned and two-toned colonies of B. diegensis. Intraspecific variations between Korean and other regions of B. diegensis from the NCBI ranged from 0.0% to 1.3%. The Korean B. diegensis was clearly distinct from other species of Botrylloides at 15.8–24.2%. In phylogenetic analysis results, Korean B. diegensis was established as a single clade with other regions of B. diegensis and was clearly distinct from Korean B. violaceus. After reviewing previous monitoring data, it was found that two-toned B. diegensis was already found in six harbors by July 2017. It has now spread into 14 harbors along the coastal line of South Korea. This means that B. diegensis might have been introduced to South Korea between 1999 and 2016.

scholarly journals An additional record of the non-indigenous species (NIS) Seriola fasciata from the southern coast of Sicily (Central Mediterranean Sea)

2020 ◽  
Vol 61 (2) ◽  
pp. 223-230
Author(s):  
Michele Luca Geraci ◽  
Fabio Falsone ◽  
Danilo Scannella ◽  
Sergio Vitale
Keyword(s):  
Spatial Distribution ◽  
Mediterranean Sea ◽  
Indigenous Species ◽  
Southern Coast ◽  
Central Mediterranean ◽  
Seriola Dumerili ◽  
Central Mediterranean Sea ◽  
Greater Amberjack ◽  
Non Indigenous Species

An additional record of the non-indigenous species (NIS) Seriola fasciata from the southern coast of Sicily (Central Mediterranean Sea) is here described in this note. The catch record is the first in the area and confirms the key role of the area for NIS spreading. In addition, an updated map of its spatial distribution is provided as well as a discussion on the possible misidentification and competition with the native greater amberjack Seriola dumerili.

scholarly journals Substrate type as a selective tool against colonization by non-native sessile invertebrates

2010 ◽  
Vol 58 (3) ◽  
pp. 219-231 ◽  
Author(s):  
Leonardo C Cangussu ◽  
Luciana Altvater ◽  
Maria Angélica Haddad ◽  
Ana Caroline Cabral ◽  
Halina Linzmeier Heyse ◽  
...  
Keyword(s):  
Concrete Columns ◽  
Artificial Substrates ◽  
Indigenous Species ◽  
Southern Brazil ◽  
Substrate Type ◽  
Fiber Glass ◽  
Sessile Invertebrates ◽  
Cryptogenic Species ◽  
Non Indigenous Species ◽  
Rough Cut

Different substrates of varying composition, color, texture and orientation may selectively influence recruitment of sessile invertebrates and thereby influence the resultant community. Thus substrates may act as a barrier to the establishment of non-indigenous species (NIS). In southern Brazil, granite is the main rock forming natural rocky walls that are available for encrusting organisms. In this study we tested whether granite selectively influences recruitment and impedes colonization by introduced and cryptogenic species that are already established on artificial substrates within the region. Plates of rough cut granite and of polyethylene were made available each month under a pier at a yacht club in Paranaguá Bay. A community is already established on concrete columns and fiber glass floats on the piers. After one, two and twelve months, the faunal composition of the plates was compared between the two treatments and other artificial substrates. Granite was recruited by all the seven introduced species found in the Bay and by 18 of 26 cryptogenic species and therefore is ineffective as a barrier to NIS colonization.

The seaweed resources of Portugal

2019 ◽  
Vol 62 (5) ◽  
pp. 499-525 ◽  
Author(s):  
Rui Gaspar ◽  
Leonel Pereira ◽  
Isabel Sousa-Pinto
Keyword(s):  
18Th Century ◽  
Latitudinal Gradients ◽  
Indigenous Species ◽  
Valuable Resource ◽  
Research Groups ◽  
The Past ◽  
Role Players ◽  
Portuguese Higher Education ◽  
Almost All ◽  
Non Indigenous Species

Abstract Continental Portugal and its two archipelagos (Azores Islands and Madeira Islands) present a very interesting and diverse seaweed community. Its great diversity results for example from different environmental conditions such as the latitudinal gradients that affect the continental Portugal coastal shoreline in unique ways. The first Portuguese phycological studies published date from the end of the 18th century and seaweeds have been harvested to be used as fertilizer since at least the 14th century. However, Portuguese seaweeds are still a natural and valuable resource that is relatively under explored or studied, particularly regarding its economic potential. Although Portugal was one of the world’s main agar producers in the past, the sustainability of its seaweed exploitation was overlooked. Contemporary awareness of this valuable resource might bring together role players such as researchers and industries towards innovative and sustainable practices (such as to make use of non-indigenous species that have been registered in the country). Nowadays, almost all Portuguese higher education institutions currently have research groups dedicated to studies related to seaweeds (ranging from ecological and environmental assessment studies to seaweed aquaculture, uses and applications). This work addresses the diversity of Portuguese seaweeds and its main economic aspects.

scholarly journals Ecological and environmental context shape the differential effects of a facilitator in its native and invaded ranges

2020 ◽  
Author(s):  
Amelia Hesketh ◽  
Evangelina Schwindt ◽  
Christopher Harley
Keyword(s):  
Species Interactions ◽  
Evolutionary History ◽  
Indigenous Species ◽  
Native Range ◽  
Negative Effects ◽  
Algal Cover ◽  
Positive Effects ◽  
Introduced Range ◽  
Non Indigenous Species ◽  
Associated Species

Non-indigenous species often exhibit disproportionately strong negative effects in their introduced range compared to their native range, and much research has been devoted to understanding the role of shared evolutionary history, or lack thereof, in driving these differences. Less studied is whether non-indigenous species, particularly those that are important as facilitators in their native range, have persistent positive effects in their invaded range despite a lack of a shared evolutionary history with the invaded community. Here, we manipulated the density of a habitat-forming facilitator, the high intertidal acorn barnacle Balanus glandula, factorially with herbivore density in its native range (Bluestone Point, British Columbia, Canada) and invaded range (Punta Ameghino, Chubut Province, Argentina) to determine how this facilitator differentially affects associated species at these two locations. Given that high intertidal species at Punta Ameghino (PA) are evolutionarily naïve to barnacles, we predicted that the positive effects of B. glandula at PA would absent or weak compared to those at Bluestone Point (BP). However, we found that B. glandula had an equally positive effect on herbivore biomass at PA compared to BP, possibly because the moisture-retaining properties of barnacle bed habitats are particularly important in seasonally dry Patagonia. Barnacle presence indirectly decreased ephemeral algal cover at BP by increasing grazer pressure, but barnacles instead facilitated ephemeral algae at PA. In contrast, B. glandula increased perennial algal cover at BP, but generally decreased perennial algal cover at PA, likely due to differences in dominant algal morphology. These results suggest that shared evolutionary history is not a prerequisite for strong facilitation to occur, but rather that the nature and strength of novel species interactions are determined by the traits of associated species and the environment in which they occur.

Spatial distribution and substrate preferences of the non-indigenous amphipod Gammarus roeselii Gervais, 1835

2020 ◽  
Vol 71 (7) ◽  
pp. 723
Author(s):  
Daniele Paganelli ◽  
Alessandra Pandolfi ◽  
Renato Sconfietti ◽  
Agnese Marchini
Keyword(s):  
Spatial Distribution ◽  
River Basin ◽  
Laboratory Experiments ◽  
Northern Italy ◽  
Indigenous Species ◽  
Swimming Ability ◽  
Substrate Preferences ◽  
Inorganic Substrates ◽  
Almost All ◽  
Non Indigenous Species

Gammarus roeselii is one of the successful non-indigenous species recently established in the Ticino River basin (Northern Italy). G. roeselii is not usually considered to be a real threat to native gammarids because no evidence has been reported so far on its effects on biodiversity and habitats. In this study, we assessed the spatial distribution of G. roeselii in the secondary hydrographic system of the southern part of the sub-lacustrine Ticino River basin and examined substrate preferences on the basis of laboratory experiments. We found that G. roeselii is well established in this area, occurring in almost all the seminatural streams, reaching high densities. Furthermore, we found that this species has a preference for two distinct types of substrate: empty shells of the bivalve Corbicula fluminea, which provide a suitable shelter for the introduced amphipod, and aquatic plants, which provide food resources. Conversely, preference for inorganic substrates, such as stones, was lower. In addition, the results indicate that G. roeselii easily inhabits the water column. The high adaptability of G. roeselii, combined with its capacity to exploit different niches and its swimming ability, are ecological characteristics that can favour its colonisation of new areas.

scholarly journals A massive update of non-indigenous species records in Mediterranean marinas

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3954 ◽  
Author(s):  
Aylin Ulman ◽  
Jasmine Ferrario ◽  
Anna Occhpinti-Ambrogi ◽  
Christos Arvanitidis ◽  
Ada Bandi ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Eastern Mediterranean ◽  
Western Mediterranean ◽  
Indigenous Species ◽  
Central Mediterranean ◽  
Indigenous Status ◽  
Mediterranean Countries ◽  
Saccostrea Glomerata ◽  
The Mediterranean ◽  
Non Indigenous Species

The Mediterranean Sea is home to over 2/3 of the world’s charter boat traffic and hosts an estimated 1.5 million recreational boats. Studies elsewhere have demonstrated marinas as important hubs for the stepping-stone transfer of non-indigenous species (NIS), but these unique anthropogenic, and typically artificial habitats have largely gone overlooked in the Mediterranean as sources of NIS hot-spots. From April 2015 to November 2016, 34 marinas were sampled across the following Mediterranean countries: Spain, France, Italy, Malta, Greece, Turkey and Cyprus to investigate the NIS presence and richness in the specialized hard substrate material of these marina habitats. All macroinvertebrate taxa were collected and identified. Additionally, fouling samples were collected from approximately 600 boat-hulls from 25 of these marinas to determine if boats host diverse NIS not present in the marina. Here, we present data revealing that Mediterranean marinas indeed act as major hubs for the transfer of marine NIS, and we also provide evidence that recreational boats act as effective vectors of spread. From this wide-ranging geographical study, we report here numerous new NIS records at the basin, subregional, country and locality level. At the basin level, we report three NIS new to the Mediterranean Sea (Achelia sawayai sensu lato,Aorides longimerus,Cymodoceaff.fuscina), and the re-appearance of two NIS previously known but currently considered extinct in the Mediterranean (Bemlos leptocheirus, Saccostrea glomerata). We also compellingly update the distributions of many NIS in the Mediterranean Sea showing some recent spreading; we provide details for 11 new subregional records for NIS (Watersipora arcuata,Hydroides brachyacantha sensu latoandSaccostrea glomeratanow present in the Western Mediterranean;Symplegma brakenhielmi,Stenothoe georgiana,Spirobranchus tertaceros sensu lato,Dendostrea folium sensu latoandParasmittina egyptiacanow present in the Central Mediterranean, andW. arcuata,Bemlos leptocheirusandDyspanopeus sayiin the Eastern Mediterranean). We also report 51 new NIS country records from recreational marinas: 12 for Malta, 10 for Cyprus, nine for Greece, six for Spain and France, five for Turkey and three for Italy, representing 32 species. Finally, we report 20 new NIS records (representing 17 species) found on recreational boat-hulls (mobile habitats), not yet found in the same marina, or in most cases, even the country. For each new NIS record, their native origin and global and Mediterranean distributions are provided, along with details of the new record. Additionally, taxonomic characters used for identification and photos of the specimens are also provided. These new NIS records should now be added to the relevant NIS databases compiled by several entities. Records of uncertain identity are also discussed, to assess the probability of valid non-indigenous status.

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