Drift algae reduce foraging efficiency of juvenile flatfish

Nordström, Marie C.; Booth, Dale M.

doi:10.1016/j.seares.2007.08.001

Cited by 23 publications

(14 citation statements)

References 32 publications

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“…In addition, because the presence of Ulva mats induced a decrease in D. trunculus (Table 4) and because interspecific competition for space exists between the 2 Donacidae species (Guillou 1982), D. vittatus could find an available niche at SBs where macroalgae get stranded. Also, macroalgal mats induce a decrease of the foraging success of juvenile flatfish (Nordström & Booth 2007) and of the biomass of polychaete predators (Table 4; results in line with Weston 1990); consequently, predation pressure on D. vittatus recruits decreases, which may explain the high abundance of the bivalve where green tides occurred.…”

Section: Discussionmentioning

confidence: 55%

Effects of macroalgal accumulations on the variability in zoobenthos of high-energy macrotidal sandy beaches

Quillien¹,

Nordström²,

Gauthier³

et al. 2015

Mar. Ecol. Prog. Ser.

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Section: Discussionmentioning

confidence: 55%

Effects of macroalgal accumulations on the variability in zoobenthos of high-energy macrotidal sandy beaches

Quillien¹,

Nordström²,

Gauthier³

et al. 2015

Mar. Ecol. Prog. Ser.

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“…The higher occurrence of P. lethostigma in or near bare substrata within Christmas Bay may be because the sand substratum enhances crypsis (e.g. burial and camouflage), which is known to decrease predation rates (Fairchild & Howell, 2004;Ryer et al ., 2008) and increase foraging efficiency (Gronkjaer et al ., 2007;Nordstrom & Booth, 2007). Other habitat types may still be important for prey production, as invertebrate densities are often highest in seagrass beds (Beck et al ., 2001).…”

Section: Discussionmentioning

confidence: 99%

Fine‐scale movements and habitat use of juvenile southern flounder Paralichthys lethostigma in an estuarine seascape

Furey

Dance

Rooker

2013

Journal of Fish Biology

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Habitat use of juvenile southern flounder Paralichthys lethostigma was examined within a shallow estuarine seascape during June and July 2011 using acoustic telemetry. Fine-scale movement and habitat use of P. lethostigma was investigated with an acoustic positioning system placed in a seascape that varied in habitat type, physicochemical conditions and bathymetry. The use of different habitat types was examined with Euclidean distance-based analyses, and generalized additive models were used to determine the relative importance of habitat type relative to physicochemical conditions and bathymetry. Tracks of P. lethostigma ranged in distance between 1477 and 8582 m and speed was 4·2 ± 1·1 m min⁻¹ (mean ± s.e.) for all P. lethostigma combined. Depth, slope and habitat type had the most influence on P. lethostigma occurrence and deep sandy areas with shallow slopes were used most frequently. In addition, depth use by P. lethostigma was influenced by tidal cycles, indicating habitat use varies temporally and is dynamic. Finally, temperatures <30·5° C were used more than warmer waters within the study area. The results successfully identify movements by juvenile P. lethostigma, and indicate that definitions of essential habitats need to account for dynamics in habitat use.

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“…However, speciesspecific attributes with respect to the phenology, morphology and biology of different species can influence the structure of associated communities through a number of mechanisms (Wernberg et al 2000, Bégin et al 2004, York et al 2006. Increased cover or density can limit movement and foraging activities of mobile species (Nordström & Booth 2007) and provide hiding opportunities for potential prey. Species morphology can directly influence habitat properties by providing microhabitats needed for different taxa or indirectly influence recruitment through passive (e.g.…”

Section: Introductionmentioning

confidence: 99%

Higher abundance and diversity in faunal assemblages with the invasion of Codium fragile ssp. fragile in eelgrass meadows

Drouin

McKindsey²,

Johnson³

2011

Mar. Ecol. Prog. Ser.

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The present study examined how species-specific attributes of the invasive alga Codium fragile ssp. fragile (hereafter Codium) and eelgrass Zostera marina influenced faunal assemblages associated with eelgrass ecosystems in îles de la Madeleine, eastern Canada. Direct association of species with Codium (<1 m) was evaluated and compared to eelgrass faunal assemblages from invaded beds. Potential neighborhood effects (ca. 10 m) were assessed by comparing invertebrates associated with eelgrass in invaded and non-invaded beds. The influence of Codium on more mobile species was evaluated by comparing fish assemblages associated with macrophytes in invaded and non-invaded beds. In addition, species-area relationships for low mobility species associated with Codium were contrasted between beds where Codium or eelgrass was the dominant structuring macrophyte. Codium had distinct invertebrate species assemblages, as there was a greater abundance and diversity of invertebrates associated with Codium than with eelgrass, and multivariate assemblage structure differed between macrophyte types. In contrast, no neighborhood patterns were observed as invertebrate assemblages associated with eelgrass did not differ between invaded and non-invaded beds, suggesting that the mechanisms that account for differences between the invertebrate assemblages are a function of the macrophyte's nature and operate at small spatial scales. Fish community structure differed between invaded and non-invaded beds, largely due to a greater abundance of 2 fishes, Apeltes quadracus and Tautogolabrus adspersus, in invaded beds. Epifaunal abundance and species richness were positively correlated with Codium thallus biomass, and the abundance relative to biomass correlation was greatest where Codium was the dominant macrophyte. Experimental manipulation of thallus structure to create straight or branched Codium fronds with similar surface area showed that associated invertebrate and gastropod abundance was not influenced by this factor and indicated that factors other than macrostructure complexity influenced the presence of epifauna on the introduced alga. Overall, the present study suggests that the invasion of eelgrass beds by Codium increases faunal density and diversity. However, longer-term effects of Codium invasion in this and other eelgrass ecosystems require further assessment, as the severity of the invasion effects on faunal communities likely depends on the interaction between Codium and eelgrass.

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Drift algae reduce foraging efficiency of juvenile flatfish

Cited by 23 publications

References 32 publications

Effects of macroalgal accumulations on the variability in zoobenthos of high-energy macrotidal sandy beaches

Effects of macroalgal accumulations on the variability in zoobenthos of high-energy macrotidal sandy beaches

Fine‐scale movements and habitat use of juvenile southern flounder Paralichthys lethostigma in an estuarine seascape

Higher abundance and diversity in faunal assemblages with the invasion of Codium fragile ssp. fragile in eelgrass meadows

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