The Invasive Kelp Undaria Pinnatifida (Phaeophyceae, Laminariales) Reduces Native Seaweed Diversity in Nuevo Gulf (Patagonia, Argentina)

Casas, Graciela Noemi; Scrosati, Ricardo A.; Piriz, María Luz

doi:10.1023/b:binv.0000041555.29305.41

Cited by 197 publications

(123 citation statements)

References 27 publications

Supporting

Mentioning

113

Contrasting

Unclassified

Order By: Relevance

“…Colonization of natural habitats may have been facilitated by disturbance to native canopies, through storm events or anthropogenic stressors for example, as has been shown elsewhere (Valentine and Johnson, 2003;Schiel and Thompson, 2012) It is not yet known whether the presence of U. pinnatifida in the UK has detrimental effects on native flora and fauna, through increased competition for resources for example, as has been suggested in other temperate regions invaded by U. pinnatifida (Curiel et al, 1998;Casas et al, 2004). Alternatively, U. pinnatifida may have negligible effects on native macroalgae as it may occupy a different niche than native canopy formers, with minimal spatial or temporal overlap in demand for resources.…”

Section: Discussionmentioning

confidence: 94%

“…Research into the effects of U. pinnatifida invasions on recipient macroalgae-dominated systems has shown varying impacts on local biodiversity. Studies have shown both an increase (Irigoyen et al, 2011) and a decrease (Curiel et al, 1998;Casas et al, 2004) in local diversity as a result of U. pinnatifida introductions, as well as subtle and inconsistent effects on native species and associated assemblages (Raffo et al, 2009;South et al, 2015). It is likely that U. pinnatifida impacts are context-dependent, but it does have the potential to affect the performance and/or abundance of native kelp species within Plymouth Sound because it is an opportunistic fast-growing species that occupies a substantial area of seabed by early summer (Heiser et al, 2014), and can shade co-existing native species (Smale, pers obs.).…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

The structure of biogenic habitat and epibiotic assemblages associated with the global invasive kelp Undaria pinnatifida in comparison to native macroalgae

et al. 2015

View full text Add to dashboard Cite

Kelp forests dominate temperate and polar rocky coastlines and represent critical marine habitats because they support elevated rates of primary and secondary production and high biodiversity. A major threat to the stability of these ecosystems is the proliferation of nonnative species, such as the Japanese kelp Undaria pinnatifida ('Wakame'), which has recently colonised natural habitats in the UK. We quantified the abundance and biomass of U. pinnatifida on a natural rocky reef habitat over 10 months to make comparisons with three native canopy-forming brown algae (Laminaria ochroleuca, Saccharina latissima, and Saccorhiza polyschides). We also examined the biogenic habitat structure provided by, and epibiotic assemblages associated with, U. pinnatifida in comparison to native macroalgae. Surveys conducted within the Plymouth Sound Special Area of Conservation indicated that U. pinnatifida is now a dominant and conspicuous member of kelp-dominated communities on natural substrata. Crucially, U. pinnatifida supported a structurally dissimilar and less diverse epibiotic assemblage than the native perennial kelp species. However, U. pinnatifidaassociated assemblages were similar to those associated with Saccorhiza polyschides, which has a similar life history and growth strategy. Our results suggest that a shift towards U. pinnatifida dominated reefs could result in impoverished epibiotic assemblages and lower local biodiversity, although this could be offset, to some extent, by the climate-driven proliferation of L. ochroleuca at the poleward range edge, which provides complex biogenic habitat and harbours relatively high biodiversity. Clearly, greater understanding of the long-term dynamics and competitive interactions between these habitat-forming species is needed to accurately predict future biodiversity patterns.

show abstract

Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 98%

The structure of biogenic habitat and epibiotic assemblages associated with the global invasive kelp Undaria pinnatifida in comparison to native macroalgae

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Así lo indican los estudios de Walker & Kendrick (1998) en Australia, Sanderson & Barret (1989) en Tasmania y Casas & al. (2004) en Argentina.…”

Section: Impacto Ambiental Y Perspectivas De Futurounclassified

Untitled

Cremades¹,

Gago²,

Peteiro³

2006

Anal. Jard. Bot. Madr.

View full text Add to dashboard Cite

ResumenUndaria pinnatifida es una especie asiática de gran interés económico como alga alimentaria que en la década de los ochenta apareció por primera vez en España en las costas de Galicia, donde actualmente se encuentra ampliamente distribuida y naturalizada. Las poblaciones intermareales de los esporófitos de esta especie en la costa gallega son propias de localidades moderadamente expuestas a la acción del oleaje, siendo muy notorias a principios de primavera; aunque pueden encontrarse casi todo el año, al existir al menos dos períodos anuales de reclutamiento. La morfología de los ejemplares que las forman es muy variable y está fuertemente relacionada con las variaciones espaciotemporales de las condiciones ambientales. Analizando la cronología de su introducción en Galicia y los hábitats y tipos de comunidades en las que se integra, se observa claramente la influencia de las actividades humanas en todo ello, sobre todo las derivadas de la acuicultura de moluscos y el tráfico marítimo. U. pinnatifida es una especie de lenta expansión natural, poco agresiva y que ocupa temporalmente nichos ecológicos vacíos, siendo solo abundante sobre sustratos artificiales o en aquellos naturales cuya vegetación ha sido en alguna medida previamente degradada.Palabras clave: Atlántico noroeste, algas marinas, especies alóctonas, Undaria pinnatifida, morfología, fenología, ecología, impacto ambiental. AbstractUndaria pinnatifida is an Asian seaweed that is valuable as an edible species. This kelp was first reported for Spain in the 1980s on Galician coasts, where it is now widely distributed and incorporated into the native community. In Galicia, intertidal populations of the sporophytic phase typically inhabit sites under moderate wave-exposure in the early spring, albeit they can be found throughout the year as the species displays at least two recruitment periods per year. The morphology varies between individuals and depends strongly on the spatiotemporal pattern of environmental conditions. The chronology of the introduction of this species and the types of habitat where it is currently integrated on Galician coasts clearly reveal that the presence and local expansion of this kelp is influenced largely by human activities, mainly shellfish aquaculture and maritime traffic. U. pinnatifida has a slow natural expansion, limited aggressiveness and it temporarily fills empty niches; this kelp displays luxuriant growth only on artificial substrates or in otherwise disturbed communities.

show abstract

“…Its unique mechanism of settlement on the outer lip of the shell aperture altered calcium deposition and often severely retarded the growth of infested individuals and economic losses to the industry were considerable (CULVER & KURIS 2000). The kelp Undaria pinnatifida (Phaeophyceae), native to northeast Asia, was first detected in late 1992 offshore in central Patagonia (Argentina) and is progressively spreading, along with a dramatic decrease in species richness and diversity of native seaweeds in Nuevo Gulf (CASAS et al 2004). These are only a few recent examples.…”

Section: Resumo Ascídiasmentioning

confidence: 99%

Introduced ascidians in Paranaguá Bay, Paraná, southern Brazil

Rocha

Kremer

2005

Rev. Bras. Zool.

View full text Add to dashboard Cite

Exotic (introduced) species are a growing problem in ports worldwide and comprise the most important impacts in marine ecosystems. Periodic monitoring to detect introduced species is extremely important for effective population control. Here we sampled ascidian species near the port of Paranaguá for a taxonomic study of this fauna to attempt to detect introduced species. Larval stages in ascidians are short-lived, and dispersal is restricted to small distances, and so ascidians are very good bioindicators for exotic introductions due to ship transport. Four locations were sampled within Paranaguá Bay (Ilha das Cobras, Pier Tenenge, Ilha do Mel and Ilha da Galheta) and one location outside of the bay (Parque dos Meros). Information for the nearby fauna and for geographic distributions of the species involved was obtained from the literature. Eighteen species were found: Perophora multiclathrata (Sluiter, 1904), Ascidia curvata (Traustedt,1882), A. sydneiensis Stimpson, 1855, Clavelina oblonga Herdman, 1880, Cystodytes dellechiajei (Della Valle, 1877), Eudistoma carolinense van Name, 1945, Distaplia bermudensis van Name, 1902, Didemnum granulatum Tokioka, 1954, Diplosoma listerianum (Milne-Edwards, 1841), Lissoclinum fragile (van Name, 1902), Botryllus planus (van Name, 1902), B. tuberatus Ritter & Forsyth 1917, Botrylloides nigrum Herdman, 1886, Symplegma rubra Monniot, 1972, Styela canopus (Savigny, 1816), S. plicata (Lesueur, 1823), Microcosmus exasperatus Heller, 1878 and Molgula phytophila Monniot, 1970. The known geographic distributions based on the literature and collections suggest that three species are native, one is a inter-regional introduction, two are introduced from the Pacific and the remaining 12 are cryptogenic.

show abstract

The Invasive Kelp Undaria Pinnatifida (Phaeophyceae, Laminariales) Reduces Native Seaweed Diversity in Nuevo Gulf (Patagonia, Argentina)

Cited by 197 publications

References 27 publications

The structure of biogenic habitat and epibiotic assemblages associated with the global invasive kelp Undaria pinnatifida in comparison to native macroalgae

The structure of biogenic habitat and epibiotic assemblages associated with the global invasive kelp Undaria pinnatifida in comparison to native macroalgae

Untitled

Introduced ascidians in Paranaguá Bay, Paraná, southern Brazil

Contact Info

Product

Resources

About