Eco-physiological and biochemical study of two of the most contrasting forms of Chondrus crispus (Rhodophyta, Gigartinales)

Chopin, Thierry; Floc′h, Jean-Yves

doi:10.3354/meps081185

Cited by 28 publications

(14 citation statements)

References 36 publications

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“…Addition of high concentrations of nutrients produced a decline in productivity in the first weeks, but also reduced contamination by epiphytes, which appeared to be more affected than C. canaliculatus. Manipulation of nutrient concentrations may be a useful method for controlling epiphytism in these tank cultures in the future, although both photosynthesis and carrageenan content could decline under these conditions (Chopin and Floc'h 1992). This supposition was not apparent in the present study, however, as the carrageenan yield from C. canaliculatus remained unchanged in spite of the different nutrient treatments.…”

Section: Discussioncontrasting

confidence: 44%

Cultivation of Chondrus canaliculatus (C. Agardh) Greville (Gigartinales, Rhodophyta) in controlled environments

et al. 2007

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Increased market demand for algal raw materials has stimulated research and development into new cultivation technologies, particularly in countries with economically important seaweed industries. Chondrus canaliculatus is a red alga endemic to the temperate Pacific coast of South America and produces a complex carrageenan. In Chile, this potential marine resource has been underutilized since the early 1990s, after it was replaced mainly by imports of Kappaphycus and Eucheum from Asia. The study of the cultivation of C. canaliculatus in outdoor tanks demonstrates the potential to produce large quantities of algal material due to the high productivity observed. The material produced may be important in Chile as feed for cultured algal herbivores such as Haliotis spp. Data were obtained on the key factors affecting the growth of this alga, including light, temperature, and nutrient concentrations. The results showed that, on a dry weight basis, productivity varied seasonally between 40 g m -3 wk -1 in autumn and 200 g m -3 wk -1 in spring, and the optimal stocking density in our experiments was 8 kg m -3 . Effects of selfshading were among the most important limiting factors in the culture. Discussion is presented on the interactions between temperature, pH, salinity, enrichment with N and P, and water exchange on the maximal growth of C. canaliculatus in this culture.

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Section: Discussioncontrasting

confidence: 44%

Cultivation of Chondrus canaliculatus (C. Agardh) Greville (Gigartinales, Rhodophyta) in controlled environments

et al. 2007

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“…The intertidal population at our study site, Chamberlain, Maine, was consistent with this pattern, being comprised of >80 % gametophytic fronds (Kubler 1992 (Mathieson & Norall 1975, Chopin & Floch 1992, and for this reason we did not distinguish between the 2 phases in our study. In this paper we present evidence that the physiological differences between the heteromorphic stages of Mastocarpus stellatus are consistent with the hypothesis that their respective upper distributional limits in the intertidal zone are determined by physical factors.…”

Section: Introductionmentioning

confidence: 51%

Physiological responses to environmental variation in intertidal red algae: does thallus morphology matter?

Dudgeon¹,

Kübler

Vadas³

et al. 1995

Mar. Ecol. Prog. Ser.

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Morphological variation within and among many species of algae show correlated life history traits. The trade-offs of life history traits among different morphs are presumed to be determined by morphology Form-function hypotheses also predict that algae of different morphological groups exhibit different tolerances to physiological stress, whereas algae within a morphological group respond similarly to stress. We tested this hypothesis by comparing photosynthetic and respiratory responses to variation in season, light, temperature, desiccation and freezing among the morphologically similar fronds of Chondrus crispus and Mastocarpus stellatus and the alternate stage crust of M stellatus. Physiological differences between fronds of the 2 species and crusts and fronds were consistent with their patterns of distribution and abundance in the intertidal zone. However, there was no clear relationship between algal morphology and physiological response to environmental variation These results suggest that among macroalgae the correlation between life history traits and morphology is not always causal. Rather, the link between life history traits and morphology is constrained by the extent to which physiological characteristics codetermme these features.

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“…Similar differences may exist within populations of C. crispus, which have been extensively studied in Canadian populations (Harvey andMcLachlan 1973, Chopin 1986) and to a lesser 448 STACY A. KRUEGER-HADFIELD ET AL. extent in European populations (Chopin and Floc'h 1992, Lindgren and Å berg 1996, Plumb 1999. Few studies of the underlying factors of the haploid bias, such as differences in fitness, have been conclusive, in large part due to the lack of information about the size of genets in the field.…”

Section: Discussionmentioning

confidence: 99%

“…2000, Wang et al. 2008) and instead focused on the conspicuous range of morphological variation (Mathieson and Prince 1973, Craigie and Pringle 1978, Chopin and Floc’h 1992, Gutierrez and Fernández 1992) and the patterns of gametophyte phase dominance (Fierst et al. 2005 and citations therein).…”

mentioning

confidence: 99%

“…Owing to its extractive carrageenan and use in the phycocolloid industry, numerous studies have been undertaken to understand more about the biology and ecology of C. crispus (Bhattacharya 1985, Lazo et al 1989, Correa and McLachlan 1991, Scrosati and Mudge 2004. Yet, much of the early work did not address the evolutionary potential of this species (genetic diversity and local adaptation; Cheney and Mathieson 1979, Donaldson et al 2000, Wang et al 2008) and instead focused on the conspicuous range of morphological variation (Mathieson and , Craigie and Pringle 1978, Chopin and Floc'h 1992, Gutierrez and Fernández 1992 and the patterns of gametophyte phase dominance (Fierst et al 2005 and citations therein). Comparisons between previous studies are somewhat limited due to discrepancies as to whether the genet (holdfast including all upright fronds; Kautsky and Ehn 1993) or the ramet (frond; e.g., Bhattacharya 1985) was studied.…”

mentioning

confidence: 99%

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Genetic Population Structure and Mating System in Chondrus Crispus (Rhodophyta)1

Krueger‐Hadfield

Collén

Daguin‐Thiébaut

et al. 2011

Journal of Phycology

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Chondrus crispus Stackh. has been intensely studied, yet no study to date has elucidated its population structure or mating system despite many populations in which there was a haploid bias and lack of male gametophytes. Therefore, 12 nuclear microsatellite loci were identified in this red alga. Microsatellite markers were developed and tested against a panel of specimens collected from two shore levels at two sites in Brittany, France: Pointe de Primel and Pointe de la Jument, Concarneau. Single locus genetic determinism was verified at eight polymorphic loci, as only one band was observed for haploid genotypes, whereas one or two bands were observed for diploids. These markers enabled the detection of unique genotypes within sampled populations, indicating that very few fronds shared the same multilocus genotype. This finding suggests that asexual reproduction was not the prevailing mode of reproduction. In addition, we explored the hierarchical population structure showing that gene flow is restricted at small spatial scales (<50 m) between upper and lower Chondrus-range populations within a shore. Sexual reproduction predominated in the populations of C. crispus studied, but probably due to fine-scale spatial substructuring, inbreeding was also significant. In conclusion, this study reveals that fine-scale genetic variation is of major importance in C. crispus, suggesting that differences between microhabitats should be essential in understanding evolutionary processes in this species.

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Eco-physiological and biochemical study of two of the most contrasting forms of Chondrus crispus (Rhodophyta, Gigartinales)

Cited by 28 publications

References 36 publications

Cultivation of Chondrus canaliculatus (C. Agardh) Greville (Gigartinales, Rhodophyta) in controlled environments

Cultivation of Chondrus canaliculatus (C. Agardh) Greville (Gigartinales, Rhodophyta) in controlled environments

Physiological responses to environmental variation in intertidal red algae: does thallus morphology matter?

Genetic Population Structure and Mating System in Chondrus Crispus (Rhodophyta)1

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