scholarly journals Sabella spallanzanii and Seafloor Biodiversity Enhancement in a Marine Soft-Sediment System

Diversity ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 228
Author(s):  
Emily J. Douglas ◽  
Michael Townsend ◽  
Leigh W. Tait ◽  
Barry L. Greenfield ◽  
Graeme J. Inglis ◽  
...  
Keyword(s):  
Ecological Impacts ◽  
Indigenous Species ◽  
Soft Sediment ◽  
Species Accumulation Curves ◽  
Feeding Mode ◽  
Size Diversity ◽  
Epifaunal Assemblages ◽  
Benthic Ecosystems ◽  
Clump Size ◽  
Non Indigenous Species

Predicting and managing the potential economic, social, and ecological impacts of bioinvasions is a key goal of non-indigenous species (NIS) research worldwide. The marine fan worm, Sabella spallanzanii, is an ecosystem engineering NIS that forms dense filter-feeding canopies on hard substrata and large clumps of individuals in soft sediment habitats. In this study, we investigated the epifaunal assemblages associated with Sabella clumps of increasing size and complexity from soft-sediment benthic ecosystems in Auckland Harbour, New Zealand. The diversity and abundance of epifaunal taxa increased with clump size. Species accumulation curves suggest that with further increases in Sabella clump size, diversity will continue to increase. There were no differential effects on taxa related to feeding mode or motility despite the potential for Sabella to reduce food to suspension feeders (through competition) and increase food supply to deposit feeders (through biodeposition). Our results provide an example of local biodiversity enhancement by an NIS, though some of the species benefitting from Sabella were themselves non-indigenous or of uncertain origin (cryptogenic/indeterminate). Longer term studies of the impacts of Sabella on native biodiversity and ecosystem functioning, including on food webs, are important next steps.

Meta-analysis on the ecological impacts of widely spread non-indigenous species in the Baltic Sea

2021 ◽  
pp. 147375
Author(s):  
Henn Ojaveer ◽  
Jonne Kotta ◽  
Okko Outinen ◽  
Heli Einberg ◽  
Anastasija Zaiko ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Meta Analysis ◽  
Ecological Impacts ◽  
Indigenous Species ◽  
The Baltic Sea ◽  
The Baltic ◽  
Non Indigenous Species

scholarly journals Comparative feeding behaviour of native and introduced terrestrial snails tracks their ecological impacts

NeoBiota ◽  
2019 ◽  
Vol 47 ◽  
pp. 81-94 ◽  
Author(s):  
Tedi Hoxha ◽  
Steve Crookes ◽  
Ian MacIsaac ◽  
Xuexiu Chang ◽  
Mattias Johansson ◽  
...  
Keyword(s):  
Functional Response ◽  
Feeding Behaviour ◽  
Native Species ◽  
Ecological Impact ◽  
Land Snails ◽  
Ecological Impacts ◽  
Food Type ◽  
Indigenous Species ◽  
Competitive Abilities ◽  
Non Indigenous Species

A developing body of theory and empirical evidence suggest that feeding behaviour as measured by the functional response (FR) can assist researchers in assessing the relative potential, ecological impacts and competitive abilities of native and introduced species. Here, we explored the FRs of two land snails that occur in south-western Ontario, one native (Mesodonthyroidus) and one non-indigenous (Cepaeanemoralis) to Canada. The non-indigenous species appears to have low ecological impact and inferior competitive abilities. Consistent with theory, while both species conformed to Type II functional responses, the native species had a significantly higher attack rate (5.30 vs 0.41, respectively) and slightly lower handling time (0.020 vs 0.023), and hence a higher maximum feeding rate (50.0 vs 43.5). The non-indigenous species exhibited a significantly longer time to contact for a variety of food types, and appeared less discriminating of paper that was offered as a non-food type. The non-indigenous species also ate significantly less food when in mixed species trials with the native snail. These feeding patterns match the known low ecological impact of the introduced snail and are consistent with the view that it is an inferior competitor relative to the native species. However, field experimentation is required to clarify whether the largely microallopatric distributions of the two species in south-western Ontario reflect competitive dominance by the native species or other factors such as habitat preference, feeding preferences or predator avoidance. The relative patterns of feeding behaviour and ecological impact are, however, fully in line with recent functional response theory and application.

scholarly journals First Record of the Alien Species Procambarus virginalis Lyko, 2017 in Fresh Waters of Sardinia and Insight into Its Genetic Variability

Life ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 606
Author(s):  
Daria Sanna ◽  
Ilenia Azzena ◽  
Fabio Scarpa ◽  
Piero Cossu ◽  
Angela Pira ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Alien Species ◽  
Procambarus Clarkii ◽  
Mitochondrial Gene ◽  
First Record ◽  
Indigenous Species ◽  
Fresh Waters ◽  
Mediterranean Island ◽  
Marbled Crayfish ◽  
Non Indigenous Species

In the fresh waters of Sardinia (Italy), the non-indigenous crayfish species Procambarus clarkii has been reported from 2005, but, starting from 2019, there have been several reports of a new non-indigenous crayfish in southern and central areas of this Mediterranean island, and its morphology suggests that this species may be the marbled crayfish Procambarus virginalis. Forty-seven individuals of this putative species were analyzed, using the mitochondrial gene Cytochrome c Oxidase subunit I as molecular marker to identify this crayfish and investigate the level of genetic variability within the recently established population. Phylogenetic and phylogeographic analyses were carried out on a dataset including sequences from the Sardinian individuals and from all congenerics available in GenBank. Results showed that the new Sardinian crayfish belong to the species P. virginalis. All the sequences belonging to P. virginalis from European countries are identical, with only few exceptions found among Sardinian individuals. In conclusion, this paper highlights the occurrence of a new further alien species in the Sardinian fresh waters, which are already characterized by the high presence of non-indigenous species.

scholarly journals Economic and Environmental Impacts of Harmful Non-Indigenous Species in Southeast Asia

PLoS ONE ◽  
2013 ◽  
Vol 8 (8) ◽  
pp. e71255 ◽  
Author(s):  
Le T. P. Nghiem ◽  
Tarek Soliman ◽  
Darren C. J. Yeo ◽  
Hugh T. W. Tan ◽  
Theodore A. Evans ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Environmental Impacts ◽  
Indigenous Species ◽  
Non Indigenous Species

scholarly journals Non indigenous species settle down in the Taranto Seas

2004 ◽  
Vol 25 ◽  
Author(s):  
Francesco Mastrototaro ◽  
Antonella Petrocelli ◽  
Ester Cecere ◽  
Alfonso Matarrese
Keyword(s):  
Indigenous Species ◽  
Non Indigenous Species

scholarly journals Variability in the settlement of non-indigenous species in benthic communities from an oceanic island

2018 ◽  
Vol 72 (1) ◽  
Author(s):  
Léa Riera ◽  
Patrício Ramalhosa ◽  
João Canning-Clode ◽  
Ignacio Gestoso
Keyword(s):  
Benthic Communities ◽  
Oceanic Island ◽  
Indigenous Species ◽  
Non Indigenous Species

scholarly journals A review on the animal xenodiversity in Sicilian inland waters (Italy)

2015 ◽  
Vol 6 (1/2) ◽  
Author(s):  
Federico Marrone ◽  
Luigi Naselli-Flores
Keyword(s):  
Biological Diversity ◽  
Grey Literature ◽  
Inland Waters ◽  
Extensive Literature ◽  
Indigenous Species ◽  
Native Structure ◽  
African Clawed Frog ◽  
Extensive Literature Search ◽  
Non Indigenous Species ◽  
Clawed Frog

This paper reviews the available knowledge about faunal xenodiversity in Sicilian inland waters (Italy). The aim is to provide an updated checklist and bibliography of those non-indigenous species (NIS) which occur in the island, and to identify possible threats to its native biological diversity. Data were collected through an extensive literature search which encompassed also local journals, books, congress abstracts, and other grey literature. All the collected data were critically revised and, when possible, verified by consulting available collections or through dedicated sampling surveys. Only those data contained in reports indicating precise occurrence localities, which were confirmed by our own observations and\or by at least two independent sources including at least a peer-reviewed publication, were considered as certain. Data in literature that did not meet these criteria were considered doubtful and reported separately as unverified. The information provided by websites has been excluded as it often contains unfounded and\or erroneous data. The fauna of Sicilian inland waters host at present 31 confirmed NIS. In addition, the presence of further 11 taxa is dubious. Among the v<em>erified data</em>, invertebrate and vertebrate taxa are nearly equally represented, with 15 and 16 taxa, respectively. With 16 species, the phylum Chordata is by far the most represented, followed by Mollusca (8 species) and Arthropoda (6 species). Most of these species were detected in the last 30 years due to the lack of previous regular studies on Sicilian freshwaters. With few exceptions (<em>e.g</em>., the recent introduction of <em>Xenopus laevis</em>, the African clawed frog), NIS’ effects on native biota have not extensively studied in the island yet. Although the top-down effects caused by introduced vertebrate taxa are known to deeply modify the native structure of the biota, little information is available on the impacts caused by invertebrate taxa, especially the microscopic ones. The presence in Sicily of 11 nonnative species of bony fish is probably the most impacting threat to autochthonous fauna through predation, competition and hybridisation. The results shown in the paper highlight the importance and the urgency of more exhaustive investigations on NIS in Sicilian freshwaters with special regard to less charismatic taxa whose effects on the native biota have never been evaluated yet.

scholarly journals Non-indigenous species contribute equally to biofouling communities in international vs local ports in the Biobío region, Chile

Biofouling ◽  
2018 ◽  
Vol 34 (7) ◽  
pp. 784-799 ◽  
Author(s):  
Jean-Charles Leclerc ◽  
Frédérique Viard ◽  
Elizabeth González Sepúlveda ◽  
Christian Díaz ◽  
José Neira Hinojosa ◽  
...  
Keyword(s):  
Indigenous Species ◽  
Non Indigenous Species
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