Temperature responses of tropical to warm-temperate Atlantic seaweeds. I. Absence of ecotypic differentiation in amphi-Atlantic tropical-Canary Islands species

Pakker, Hans; Breeman, Anneke M.; Reine, Wfp Prud'homme van; vanOppen, Mjh; Vandenhoek, C

doi:10.1080/09670269600651291

Cited by 27 publications

(22 citation statements)

References 33 publications

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“…Tolerance to high or low temperatures is a derived character that can be lost or retained because of local temperature conditions (Pakker 1994). For example, the acquisition of cold adaptation and the potential for temperature acclimation has enabled the expansion of Valonia utricularis (a species with a tropical origin) into warm-temperate regions (Eggert et al 2003).…”

Section: Discussionmentioning

confidence: 99%

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Seasonal acclimatization of Asparagopsis taxiformis (Rhodophyta) from different biogeographic regions

Padilla‐Gamiño

Carpenter

2007

Limnology & Oceanography

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We studied the photosynthetic acclimatization of two populations of Asparagopsis taxiformis from two biogeographic regions (Santa Catalina Island, California, and Kaneohe Bay, Hawaii) in two seasons. We compared thermal variability between locations and estimated the environmental optima and tolerance limits of photosynthesis to understand the relationship between phenotypic plasticity and thermal variability at each location. Photosynthetic performance was assessed using oxygen evolution and pulsed amplitude modulated fluorometry to quantify responses to thermal variation. A. taxiformis from both locations had similar high temperature tolerances for maximum net photosynthesis (Pnet max ) and maximum relative electron transport rate rETR max (,30uC), but different cold temperature tolerances. Respiration rates from both locations (summer and winter) always increased above 25uC. Chlorophyll fluorescence yield from dark-adapted samples from both locations decreased at warmer temperatures in the winter and at colder temperatures during the summer. Populations exposed to greater thermal variability (across both short and long time scales) displayed greater capacity for photosynthetic acclimatization. A. taxiformis from California showed seasonal changes in photosynthetic performance within the environmental temperature range (14-21uC), whereas individuals from Hawaii did not. The narrower temperature tolerance (short-term response) of subtropical Asparagopsis may make it more susceptible than temperate populations to the predicted increases in global sea surface temperatures. Acclimatization of photosynthesis may play an important role in enabling A. taxiformis to respond to a variable environment and to persist in different biogeographic regions.

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Section: Discussionmentioning

confidence: 99%

“…Temperature variations can influence marine algae at different spatial and temporal scales, including across latitudinal gradients (Pakker et al 1996), between seasons (Cote 1983), El Niñ o events (Zimmerman and Robertson 1985), tidal immersion/emersion cycles (Helmuth 2002), upwelling events (Menge et al 2003), and internal waves (Zimmerman and Kremer 1984).…”

mentioning

confidence: 99%

Seasonal acclimatization of Asparagopsis taxiformis (Rhodophyta) from different biogeographic regions

Padilla‐Gamiño

Carpenter

2007

Limnology & Oceanography

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“…Low floristic similarity between the two continents and the fact that many of the common species have seeds readily dispersed by birds, such as Pitcairnia, or are salt-water plants whose propagules may be borne by ocean currents, led Thorne (1973) to conclude that long-distance dispersal was the more likely cause of these plant disjunctions. Recent work on tropical and warm-temperate seaweeds (Pakker et al, 1996), having an amphi-Atlantic distribution, has revealed very little genetic differentiation. However, not all organisms may be equally capable of migrating over long distances.…”

Section: mentioning

confidence: 99%

Evolutionary divergence in the pan‐Atlantic mangrove Avicennia germinans

Dodd¹,

Rafii²,

Bousquet-Mélou³

2000

New Phytologist

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Cuticular hydrocarbon composition was determined for 18 populations of Avicennia germinans (Avicenniaceae) collected from West Africa, Florida, the Pacific coast of Mexico and French Guyana. Variation in covariance structure among the hydrocarbons was evaluated from correlations among the traits for each of the populations and from a hierarchical common principal components analysis. Principal components ordinations of populations based on the 171 z* transformed correlation coefficients, onto which a minimal spanning tree was superimposed, suggested a network in which French Guyanan populations formed a nexus from which African populations differentiated biochemically from Floridan and Mexican groups. Common principal components analysis provided further support for the differentiation in covariance structure among these biochemical traits of African populations. Pacific coast Mexican populations appeared to have diverged less in covariation among traits from Atlantic American sources than did the northern (Floridan) and southern (French Guyanan) Atlantic American populations from one another. The complete isolation of Pacific coast sources after emergence of the Central American isthmus during the Pliocene provides a reference for comparison of levels of differentiation among regions that suggests an underlying pattern of divergence in this species. Partial Mantel matrix tests revealed significant geographic effects, with no significant climatic effects. Our results provide support for recognition of a major differentiation between Old and New World sources within the taxon and indicate the need for a full revision of this species.

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“…In general, when ecotypic differentiation occurs, gene flow is reduced or absent. In a previous paper we found no evidence for ecotypic differentiation in tropical to subtropical seaweed species with disjunct eastern and western Atlantic populations, despite the geographic distance (Pakker et al, 1996a). It was suggested that (trans-Atlantic) dispersal events are responsible for the lack of ecotypic differentiation.…”

Section: Introductionmentioning

confidence: 95%

“…The eastern Atlantic endemic Table 1. Distribution data based on papers cited in Pakker et al (1996a, fig. 1) with the following additions: western Atlantic, Mathieson & Dawes (1975); eastern Atlantic, SetchelI (1929), Schmidt (I93I), Gayral (1958), Seoane-Camba (1965), Ardr6 (i970), Cabioch (1974);Mediterranean, Feldmann (1937), Aleem (1951), Funk (1955), Rayss (1955), Edelstein (1964), Gfven & Oztig (1971), Lipkin & Safriel (197i) Mayhoub (1976), Boudouresque & Perret (1977), Coppejans (1977), Giaccone (1978), Nizamuddin eta[.…”

Section: Introductionmentioning

confidence: 99%

Temperature responses of tropical to warm-temperate Atlantic seaweeds. II. Evidence for ecotypic differentiation in amphi-Atlantic tropical-Mediterranean species

Pakker¹,

Breeman²

1996

European Journal of Phycology

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Nineteen isolates of four amphi-Atlantic seaweed species with a tropical to warm-temperate/Mediterranean distribution (Microdictyon boergesenii, M. tenuis, Wurdemannia miniata and Valonia utricularis) and one eastern Atlantic endemic (Mr. calodictyon) have been investigated for their temperature responses (tolerance limits and growth response curves). In all species, isolates survived undamaged at 30°C but died at 33 or 35°C. Growth occurred up to 30°C in most isolates but no growth was observed at higher (33°C) temperatures. Tolerance to low temperatures showed marked differences between and within species. In tropical isolates, damage generally occurred between I5 and 18°C and plants grew at temperatures down to 18-20°C. Isolates from warm-temperate localities (Canary Islands and Mediterranean) tolerated much lower temperatures (0-12°C), and showed substantial growth at temperatures as low as I5-18°C, which indicates ecotypic differentiation. It is hypothesized that these cold-adapted populations are descendants of populations which were isolated in the eastern Mediterranean during the last glacial episode and recolonized the western Mediterranean and Canary Islands at the onset of the interglacial.

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Temperature responses of tropical to warm-temperate Atlantic seaweeds. I. Absence of ecotypic differentiation in amphi-Atlantic tropical-Canary Islands species

Cited by 27 publications

References 33 publications

Seasonal acclimatization of Asparagopsis taxiformis (Rhodophyta) from different biogeographic regions

Seasonal acclimatization of Asparagopsis taxiformis (Rhodophyta) from different biogeographic regions

Evolutionary divergence in the pan‐Atlantic mangrove Avicennia germinans

Temperature responses of tropical to warm-temperate Atlantic seaweeds. II. Evidence for ecotypic differentiation in amphi-Atlantic tropical-Mediterranean species

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