Non-indigenous macroalga hosts different epiphytic assemblages to conspecific natives in southeast Australia

Lutz, Maiko L.; Davis, Andrew R.; Minchinton, Todd E.

doi:10.1007/s00227-010-1391-y

Cited by 13 publications

(10 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Live and attached Codium fragile supports a more diverse community of epifauna and epiphytes than native kelps (Schmidt & Scheibling 2006 and other species of brown, red, and green algae (Jones & Thornber 2010, Lutz et al 2010). This has been attributed to the highly branched morphology of C. fragile, which may provide more shelter from predators, greater surface area for attachment (Schmidt & Scheibling 2006, Drouin et al 2011, and higher sedimentation rates (Schmidt & Scheibling 2007) compared to native species.…”

Section: Discussionmentioning

confidence: 99%

“…Large mats of drifting thalli and branched fragments of C. fragile have been observed in shallow sedimentary areas adjacent to dense stands of the alga; these mats can persist for months before they are transported offshore during storms (Watanabe et al 2009). The effects of C. fragile on community dynamics have been well documented both within kelp beds (Scheibling & Gagnon 2006, Schmidt & Scheibling 2006 and in intertidal habitats (Jones & Thornber 2010, Lutz et al 2010, but the fate of detrital fragments of C. fragile is unknown.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Detrital subsidy from subtidal kelp beds is altered by the invasive green alga Codium fragile ssp. fragile

Krumhansl¹,

Scheibling²

2012

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Invasive species have the potential to alter the dynamics of detrital subsidy from high to low productivity areas through changes in quantity and nutritional quality of detrital material. We examined the effect of the invasive alga Codium fragile ssp. fragile on the nature of detrital export from subtidal algal beds off Nova Scotia, Canada, by comparing changes in mass, nutritional quality (%C, %N, C/N ratio), concentration of dimethylsulfoniopropionate (DMSP, a secondary metabolite that deters grazers), and isotopic composition (δ C. We also compared macrofaunal communities associated with degrading thalli of each algal species and found significantly higher abundances of invertebrates (mainly capitellid polychaetes) on S. latissima after 8 wk of degradation, resulting in lower evenness (J') and diversity (H ') on S. latissima compared to C. fragile. Macrofaunal community composition became similar between algal species at 12 and 16 wk in concordance with decreases in C/N ratio in S. latissima and DMSP concentration in C. fragile. Our results indicate that differences in biochemical composition and the rate of degradation between C. fragile and native kelps result in community-level effects in areas linked to shallow algal beds via the transfer of detritus.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Detrital subsidy from subtidal kelp beds is altered by the invasive green alga Codium fragile ssp. fragile

Krumhansl¹,

Scheibling²

2012

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…This study adds to the body of work indicating that C. fragile can support a similar richness of associated fauna to native macroalgae and macrophytes (Schmidt & Scheibling, 2006;Jones & Thornber, 2010;Lutz et al, 2010;Drouin et al, 2011), and suggests that an increase in abundance of C. fragile would be unlikely to lead to major biodiversity losses in associated fauna. This fits with the general trend of non-native macroalgae tending to have neutral or positive effects on fauna communities (Thomsen et al, 2016).…”

Section: Resultsmentioning

confidence: 69%

“…The impacts of non-native macroalgae on fauna have been difficult to generalise as they vary in direction and magnitude depending on a number of factors, e.g. the species in question, where it is growing, and the time of year (Wernberg et al, 2004;Buschbaum et al, 2006;Lutz et al, 2010;Gestoso et al, 2012;Engelen et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Epiphytic macroalgae mediate the impact of a non-native alga on associated fauna

Armitage

Sjøtun

2016

Hydrobiologia

View full text Add to dashboard Cite

The introduction of a non-native, habitatforming macroalga may have impacts on the seaweedassociated faunal community. Codium fragile subsp. fragile is a well-known and widespread algal invader that may compete with native habitat-forming macroalgae and affect ecosystem services. This alga can be abundant at semi-exposed/sheltered sites on the south-west coast of Norway, where its vertical distribution range overlaps with another canopy-forming alga, the native Fucus serratus. Whether these seaweeds support similar or dissimilar associated communities will influence the ecological impact of C. fragile subsp. fragile. Therefore, the richness and composition of fauna associated with these species was assessed by sampling at three localities. While the majority of taxa occurred on both F. serratus and C. fragile subsp. fragile, there were clear differences in community composition between them. Fauna taxa richness and community composition were also related to macroalgal epiphyte abundance, and there were a number of taxa associated to high epiphyte samples.The results suggest that shared macroalgal epiphytes lead to higher similarity between the invertebrate communities associated with C. fragile subsp. fragile and F. serratus, providing correlative evidence that epiphytic macroalgae play a role in shaping the impact of this macroalga on associated fauna.

show abstract

“…Macroalgae provide an ideal primary substratum for the growth of epiphytic algae (Lutz et al 2010), which significantly contribute to primary pro-ductivity (Belegratis et al 1999) and, in turn, provide habitat for other organisms (Karez et al 2000). Epiphytism entails both benefits and disadvantages for the host plant (Wahl 1989).…”

Section: Introductionmentioning

confidence: 99%

Epiphytic flora on <em>Gelidium corneum</em> (Rhodophyta: Gelidiales) in relation to wave exposure and depth

Quintano¹,

Díez²,

Muguerza³

et al. 2015

Sci. Mar.

View full text Add to dashboard Cite

Summary:The canopy-forming macroalga Gelidium corneum (Hudson) J.V. Lamouroux plays a major role in the functioning of the subtidal ecosystem of the Cantabrian Sea (northern Spain). Despite its importance, little is known about the factors that may potentially affect the distribution pattern of its epiphytic flora. Here we examine two indirect factors: coastal orientation (N and NW) and depth (3 and 7 m), as proxies for wave exposure and light availability, respectively. We test their effects on the total epiphytic load, alpha diversity (species richness, Shannon, Simpson and evenness measures) and multivariate structure of the epiphytic flora growing on G. corneum in subtidal waters off the Basque coast. Plocamium cartilagineum, Dictyota dichotoma and Acrosorium ciliolatum were found to be the most common epiphytes. Significant interactive effect of coastal orientation and depth were observed for species composition and abundance of epiphytic flora. Increased wave exposure resulted in a lower epiphyte load and a less diverse community, suggesting that under high hydrodynamic conditions epiphytes were more likely to become dislodged from hosts. However, light availability only had a significant effect on the distribution of epiphytes below a certain threshold of wave action, with the epiphytic load being 30-40% greater on shallow bottoms.Keywords: epibionts; host frond; light availability; spatial variability; macroalgae; wave action. Flora epífita deGelidium corneum (Rhodophyta: Gelidiales) en relación a la exposición al oleaje y la profundidad Resumen: El alga formadora de copa Gelidium corneum (Hudson) J.V. Lamouroux tiene un papel fundamental en el funcionamiento de los ecosistemas submareales del mar Cantábrico (norte de España). A pesar de su importancia, se sabe poco sobre los factores que afectan a la distribución de su flora epífita. En este estudio, examinamos dos factores indirectos: la orientación de la costa (N y NO) y la profundidad (3 y 7 m), como factores representativos de la exposición al oleaje y la disponibilidad de luz, respectivamente. Este estudio testa sus efectos sobre la carga total de epífitos, la alfa-diversidad (riqueza de especies, Shannon, Simpson y equitatividad) y la estructura multivariable de la flora epífita que crece sobre G. corneum en las aguas submareales de la costa vasca. Los epífitos más comunes fueron Plocamium cartilagineum, Dictyota dichotoma y Acrosorium ciliolatum. Se observó un efecto interactivo de la orientación de la costa y la profundidad para la composición de especies y la abundancia de la flora epífita. En las localidades con mayor exposición al oleaje la carga epífita era menor y la comunidad menos diversa, sugiriendo que bajo condiciones de un elevado hidrodinamismo los epífitos eran más susceptibles de ser desprendidos de su hospedador. Sin embargo, la disponibilidad de luz solo tuvo un efecto significativo en la distribución de los epífitos por debajo de ciertos umbrales de la acción del oleaje, siendo la carga de epifitos un 30-40% mayor en los fondos ...

show abstract

Non-indigenous macroalga hosts different epiphytic assemblages to conspecific natives in southeast Australia

Cited by 13 publications

References 38 publications

Detrital subsidy from subtidal kelp beds is altered by the invasive green alga Codium fragile ssp. fragile

Detrital subsidy from subtidal kelp beds is altered by the invasive green alga Codium fragile ssp. fragile

Epiphytic macroalgae mediate the impact of a non-native alga on associated fauna

Epiphytic flora on <em>Gelidium corneum</em> (Rhodophyta: Gelidiales) in relation to wave exposure and depth

Contact Info

Product

Resources

About