Diversity effects on invasion vary with life history stage in marine macroalgae

White, Laura F.; Shurin, Jonathan B.

doi:10.1111/j.0030-1299.2007.15767.x

Cited by 32 publications

(17 citation statements)

References 38 publications

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“…As pointed out by others, less is known about how native communities influence invasion success in aquatic ecosystems and/or at higher trophic levels of mobile animals (Duffy, 2002;Giller et al, 2004;France & Duffy, 2006;White & Shurin, 2007;Davis, 2009). The purpose of this research, therefore, was to determine how native zooplankton richness and species identity influenced the invasion success of the exotic freshwater cladoceran Daphnia lumholtzi (DL).…”

Section: Introductionmentioning

confidence: 99%

Experimental effect of consumer identity on the invasion success of a non-native cladoceran

Dzialowski

2010

Hydrobiologia

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An important goal of ecologists is to identify the characteristics of native communities that help to either promote or resist the invasion of nonnative taxa. In this study, experimental mesocosms were used to determine how the richness and species identity of freshwater consumers influenced the invasion success of Daphnia lumholtzi (DL), a cladoceran that has successfully invaded aquatic habitats throughout the United States. Three species of native zooplankton were used to create a gradient of richness in replicated mesocosms that included all species in monoculture, all two species combinations, and all three species together. DL was then added to each mesocosm and its biomass was monitored over time. While additional research is needed to better determine how richness affects the invasion success of DL, the presence of native zooplankton resulted in reduced levels of DL biomass in all treatments relative to the zooplankton free controls. One species (Daphnia magna, DM) was able to reduce the biomass of DL to lower levels than the other two species. DL also appeared to be unable to establish or persist over time in mesocosms with DM, unlike in mesocosms with the two other species. These species-specific effects on invasion success appeared to be related to DM's ability to reduce algal biomass to lower levels than the other two species. Therefore, while the presence of native zooplankton helps to reduce the biomass of DL once it is introduced into novel systems, the degree to which DL is able to establish and maintain populations over time within individual systems will likely depend on the presence or absence of particular species that can have particularly strong impacts on invasibility. Using such data, we may be able to predict which habitats are most likely to be invaded based on the presence or absence of individual native species.

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Section: Introductionmentioning

confidence: 99%

Experimental effect of consumer identity on the invasion success of a non-native cladoceran

Dzialowski

2010

Hydrobiologia

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“…This suggests that S. muticum individuals colonizing the siphons of T. capax must have attached as germlings, remained attached, and developed into adults on a frequently retracting clam siphon. That the S. muticum individuals attached to T. capax were adults also suggests that the occurrence of S. muticum in the eelgrass bed is not ephemeral, as S. muticum germlings recruit in July in British Columbia (White & Shurin 2007), meaning that S. muticum individuals sampled during the present study were all at least 1 yr old, having persisted over the fall. …”

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confidence: 55%

“…The main competitive effects of S. muticum are shading and the preemption of space (Britton-Simmons 2006, White & Shurin 2007. S. muticum has perennial basal axes that persist in a vegetative state over winter and thus is poised to preempt space from eelgrass following any disturbance that results in eelgrass declines or loss, such as habitat fragmentation, eutrophication, disease, or impacts of non-native species.…”

Section: Possible Impacts Of Sargassum Muticum On Eelgrassmentioning

confidence: 99%

Native clams facilitate invasive species in an eelgrass bed

White

Orr²

2011

Mar. Ecol. Prog. Ser.

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Whether the non-native seaweed Sargassum muticum can displace or impact native eelgrass Zostera marina has been debated in the literature, based on differing substrate requirements of the 2 species. Field observations in Bamfield, British Columbia, Canada, revealed that the non-native S. muticum successfully inhabits an eelgrass bed through colonizing siphons of the native clam Tresus capax. Numerical or physical facilitation of S. muticum into the eelgrass bed by T. capax may be tempered by seaweed quality or condition. We used field sampling to investigate whether seaweed condition differs between 2 attachment substrates (clam siphon and rock) as a proxy for habitat quality. Attachment substrate promoted different morphologies of S. muticum; individuals attached to clam siphons expressed morphologies consistent with sheltered areas compared to individuals attached to rock, which expressed wave-exposed morphologies. Habitat association with the different morphologies supported differences in the epibiont communities colonizing S. muticum. Further, S. muticum subsequently facilitated incursion of the non-native tunicates Styela clava and Botrylloides violaceous into the eelgrass bed through habitat provisioning. By facilitating 2 additional invaders, S. muticum enhances the level of invasion in the eelgrass bed. This non-native seaweed has the potential to disrupt the persistence of eelgrass in this system. KEY WORDS: Sargassum muticum · Zostera marina · Non-native species · Facilitation · Tresus capax Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 424: [87][88][89][90][91][92][93][94][95] 2011 Despite the ecological and environmental importance of eelgrass beds, their decline has been observed in many areas of the world, i.e. Florida Bay in North America (Fourqurean & Robblee 1999), Japan (Environment Agency of Japan 2000), the European Mediterranean (Marbà et al. 2005), and Australia (Walker et al. 2006). Over the last decade, 90 000 ha of eelgrass loss has been documented, although the actual area lost is certainly greater (Short & WyllieEcheverria 1996). Declines have been attributed to (1) disturbance of coastal and estuarine environments, including industrial, residential, and recreational development, where impacts are most notably manifested in the near-absence of eelgrasses in industrialized ports and areas of intense human coastal development (Short & Wyllie-Echeverria 1996, Orth et al. 2006, and (2) the incursion of non-native species (Orth et al. 2006, Martínez-Lüscher & Holmer 2010.We found the non-native seaweed Sargassum muticum (Yendo) Fensholt (Phaeophyceae: Fucales) colonizing an eelgrass bed at the head of Bamfield Inlet, Bamfield, British Columbia. A non-native seaweed from southeast Asia, Sargassum muticum was accidentally introduced to British Columbia around the 1940s with Japanese oysters Crassostrea gigas that were imported for aquaculture (Scagel 1956). Sargassum muticum is both a fouling species and an opportunist (Critchley...

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“…These assumptions may not be true over the full course of an invasion as competitive advantage may decrease with time and depend upon the frequency of the invasive species (Mooney and Cleland, 2001;Bøhn et al, 2004;Meiners, 2007;Morrison et al, 2007;SebertCuvillier et al, 2007;White and Shurin, 2007;Dlugosch and Parker, 2008;Hierro et al, 2009). …”

Section: Implications Of Model Assumptionsmentioning

confidence: 99%

Invasion and eradication of a competitively superior species in heterogeneous landscapes

Vuilleumier

Buttler

Perrin

et al. 2011

Ecological Modelling

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a b s t r a c tThe effect of heterogeneous environments upon the dynamics of invasion and the eradication or control of invasive species is poorly understood, although it is a major challenge for biodiversity conservation. Here, we first investigate how the probability and time for invasion are affected by spatial heterogeneity. Then, we study the effect of control program strategies (e.g. species specificity, spatial scale of action, detection and eradication efficiency) on the success and time of eradication. We find that heterogeneity increases both the invasion probability and the time to invasion. Heterogeneity also reduces the probability of eradication but does not change the time taken for successful eradication. We confirm that early detection of invasive species reduces the time until eradication, but we also demonstrate that this is true only if the local control action is sufficiently efficient. The criterion of removal efficiency is even more important for an eradication program than simply ensuring control effort when the invasive species is not abundant.

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Diversity effects on invasion vary with life history stage in marine macroalgae

Cited by 32 publications

References 38 publications

Experimental effect of consumer identity on the invasion success of a non-native cladoceran

Experimental effect of consumer identity on the invasion success of a non-native cladoceran

Native clams facilitate invasive species in an eelgrass bed

Invasion and eradication of a competitively superior species in heterogeneous landscapes

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