The first year in the life history and the survival of the juvenile marine macrophyte, Ecklonia radiata (Turn.) J. Agardh

Kirkman, Hugh

doi:10.1016/0022-0981(81)90115-5

Cited by 99 publications

(83 citation statements)

References 10 publications

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“…(Kirkman, 1981;McComb et al, 1981). Huge amounts of these macrophytes are detached by storms and heavy swells and accumulate along the shore forming large patches of plant material in the surf-zone and wrack banks on beaches and rocks.…”

Section: Introductionmentioning

confidence: 99%

Nearshore Accumulations of Detached Macrophytes as Nursery Areas for Fish

Lenanton¹,

Robertson²,

Hansen³

1982

Mar. Ecol. Prog. Ser.

123

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The feeding ecology and seasonal pattern of occurrence of the 0 + year classes of the fish Aldrichetta forsteri, Cnidoglanis macrocephalus, Sillago bassensis, and Arripis georgianus were investigated to determine relationships between these economically important species and surf-zone accumulations of detached macrophytes along the coast of Western Australia. The main prey of A. forsteri, C. macrocephalus and A. georgjanus and the second most important prey of S. bassensis was the arnphipod Allorchestes cornpressa; the distribution of A. compressa was restricted to detached plants in the surf-zone. The arrival in winter, of 3 of the fish species on the open coast corresponded with the period of greatest deposition of detached plants in the nearshore zone, and there appeared to b e sufficient plant material, and associated amphipods, to support fish during summer. The large patches of vegatation in the surf-zone of sandy beaches support densities of A. compressa up to a mean of 110 g-' dry wt vegetation and provide an alternative feeding habitat for these benthic feeders, one of which is restricted to estuaries in other regions of Australia. It is also likely that this vegetation provides shelter from potential predators such a s diving birds and larger fish.

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Section: Introductionmentioning

confidence: 99%

Nearshore Accumulations of Detached Macrophytes as Nursery Areas for Fish

Lenanton¹,

Robertson²,

Hansen³

1982

Mar. Ecol. Prog. Ser.

123

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“…E. radiata forms dense monocultures that contain few other algae species, owing to competition for light and space. [14] E. radiata is a laminarian alga with a single erect stipe, one primary blade and numerous secondary blades. [15] The meristem is located at the tip of the stipe; hence, elongation of the primary blade occurs from the base, whereas erosion occurs at the tips.…”

Section: Introductionmentioning

confidence: 99%

“…[16] E. radiata is present in various stages of growth (the growth stages have been described as juvenile (stage 1), intermediate (stage 2), and mature plants (stage 3)). [14] E. radiata can remain in the juvenile state for long periods, waiting for a break in the canopy allowing further growth. [14] In E. radiata forests, animals have a diet of live E. radiata or detritus derived from E. radiata.…”

Section: Introductionmentioning

confidence: 99%

“…[14] E. radiata can remain in the juvenile state for long periods, waiting for a break in the canopy allowing further growth. [14] In E. radiata forests, animals have a diet of live E. radiata or detritus derived from E. radiata. [17] The dominant animal species inhabiting E. radiata ecosystems on the south-east coast of New South Wales, Australia, are the gastropods Haliotis rubra and Turbo torquatus, the sea urchins Heliocidaris erythrogramma and Centrostephanus rodgersii, and the fish Odax cyanomelas.…”

Section: Introductionmentioning

confidence: 99%

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Changes in proportions of arsenic species within an Ecklonia radiata food chain

2008

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Environmental context. The present study examines arsenic species in kelp and associated grazing animals of an Ecklonia radiata food chain. The study focusses on the changes in proportions of arsenoribosides obtained from E. radiata and mechanisms are proposed to explain the transformations of arsenoribosides observed in the organisms that graze on it.Abstract. Total arsenic and arsenic species in the tissues of three growth stages of the macroalgae Ecklonia radiata and within organisms that feed on it are reported. Arsenic concentrations in E. radiata tissues varied from 40 to 153 µg g −1 . Growth stage did not influence arsenic concentrations or arsenic species. E. radiata contained glycerol arsenoriboside (1-8.5%), phosphate arsenoriboside (10-22%) and sulfonate arsenoriboside (73-91%). Arsenic concentrations varied significantly among animal species and between tissues (5-123 µg g −1 ). Animals contained variable quantities of arsenobetaine (14-83%). Haliotis rubra tissues contained high concentrations of glycerol trimethylarsonioriboside (0.7-22%) and the fish Odax cyanomelas contained large quantities of phosphate arsenoriboside (25-64%) with little arsenobetaine (1.5-15%).Arsenoribosides consumed from macroalgae are substantially converted or differentially accumulated as glycerol and phosphate arsenoribosides in animal tissues. In all animals, phosphate arsenoriboside would appear to be conserved or synthesised de novo. In gastropods, glycerol trimethylarsonioriboside and thio arsenic species are formed in the digestive system. Thus, the intermediate arsenic species that form a plausible pathway for the formation of arsenobetaine from dimethylarsenoribosides are present.

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“…These six locations span 4° north-south and 5° east-west, and they cover ~700 km of coastline including the geographic range of E. cava from its northern limit in Korea to Jeju Island. Within each location, twenty mature thalli, differentiated into branching laterals ('stage 3' as defined by Kirkman 1981) were randomly chosen from E. cava habitats at 5-25 m depth subtidal (except Dokdo where only 16 individuals were sampled) and harvested as close as possible to the hold- …”

Section: Samplingmentioning

confidence: 99%

Morphological and genetic variability among Ecklonia cava (Laminariales, Phaeophyceae) populations in Korea

Choi¹,

Ko²,

Kang³

et al. 2015

ALGAE

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Ecklonia cava Kjellman is a common kelp found in shallow subtidal in warm-temperate waters in the northwest Pacific Ocean. This species has shown substantial morphological variation along with subsistence in different locations and local environments. We quantified the magnitude of morphological variation of E. cava from six populations along ~700 km of coastline from Jeju Island to Dokdo in Korea. In addition, we examined genetic distance among the populations using random amplified polymorphic DNA (RAPD) analysis. Most morphological characteristics investigated were significantly different among locations. Multivariate analyses indicated two phenetically distinct groups (nearshore, sheltered vs. offshore, exposed), indicating wave exposure with turbidity are presumably major factors for the separation. With RAPD data, results of Nei's diversity (H) and AMOVA showed considerable variations in within-and between-populations. Pairwise Φ ST and N m values indicated moderate gene flow between the six locations. Results of Nei's analysis revealed three genetically distinct groups, not consistent with the morphological groupings, indicating that a time gap may exist between morphological and genetic variations. This study also suggests dispersal distance of this kelp may be longer than what is commonly thought and genetic similarity in the populations was largely reflected by the direction of ocean current rather than just geographical distance.

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The first year in the life history and the survival of the juvenile marine macrophyte, Ecklonia radiata (Turn.) J. Agardh

Cited by 99 publications

References 10 publications

Nearshore Accumulations of Detached Macrophytes as Nursery Areas for Fish

Nearshore Accumulations of Detached Macrophytes as Nursery Areas for Fish

Changes in proportions of arsenic species within an Ecklonia radiata food chain

Morphological and genetic variability among Ecklonia cava (Laminariales, Phaeophyceae) populations in Korea

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