. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ADAPTIVE BLEACHING HYPOTHESIS 70 55. Temperature (C°) Figure 1. Growth rates of zooxanthellae isolated from 7 hosts at three temperatures. Points represent means: error bars represent ±1 SD (n = 4). Data were obtained as increase in fluorescence over the 13-day growth period. Growth was logarithmic during this time. Fluorescence units were converted to cell density at the end of the growth period. Host: zs— /tuinihiis sociatus. mv—Montipora verrucosa, ex—Cassiopea \am- achana, KB8—Cassiopea KB8, pd—Pocillopora damicomis, ap—
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ADAPTIVE BLEACHING HYPOTHESIS 70 55. Temperature (C°) Figure 1. Growth rates of zooxanthellae isolated from 7 hosts at three temperatures. Points represent means: error bars represent ±1 SD (n = 4). Data were obtained as increase in fluorescence over the 13-day growth period. Growth was logarithmic during this time. Fluorescence units were converted to cell density at the end of the growth period. Host: zs— /tuinihiis sociatus. mv—Montipora verrucosa, ex—Cassiopea \am- achana, KB8—Cassiopea KB8, pd—Pocillopora damicomis, ap—Aipta- sia pulchella, tg—Tridacna gigas. The dotted lines represent algae in clade A, the solid lines algae in clade B. and the dashed line the alga in strain C. that the contamination was introduced at the termination of the experiments when samples were being processed for chlorophyll a measurements, cell counts, and photosyn- thetic rate studies, which was also when samples were taken for cladal identification of the experimental cultures. Ahilit\ of bleached hosts to acquire new symbionts at low zooxanthellae concentrations Symbiosis was successfully established at concentrations as low as 10 cells ml"1 (Fig. 2). Anemones exposed to higher concentrations became visibly infected sooner than those exposed to lower concentrations, suggesting that re- population was due to multiple infection events during the 48-h exposure period and that the time to visible infection is dose-dependent. Although it is not known whether recovery following natural bleaching events comes from a residual population within the host or from free-living populations in Table 3 Analysis of variance of growth rates by temperature for the seven Zooxanthella isolates Source DF SS MS Isolate 6 < Temperature 2 Isolate x Temperature 12 (A £ Q 30 Zooxanthella concentration vs Time until visibly infected. Please not
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
