. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MAAs IN .\\IHOI'li:i'K,\ 323 Linkage Distance Figure 7. Similarity phenogram for three individual specimens of each Anthopleura species collected in Santa Cruz County. California, based on the proportional concentrations (molar fraction) of the four mycospo- rine-like amino acids (MAAs) shown in Figure 6. Similarity was determined by cluster analysis and is expressed as linked Euclidean distance. A. a. = A. artemisia; A. e. = A. elegantissima; Apo A. e. = aposymbiotic A. elegantissima; A. s. = A
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MAAs IN .\\IHOI'li:i'K,\ 323 Linkage Distance Figure 7. Similarity phenogram for three individual specimens of each Anthopleura species collected in Santa Cruz County. California, based on the proportional concentrations (molar fraction) of the four mycospo- rine-like amino acids (MAAs) shown in Figure 6. Similarity was determined by cluster analysis and is expressed as linked Euclidean distance. A. a. = A. artemisia; A. e. = A. elegantissima; Apo A. e. = aposymbiotic A. elegantissima; A. s. = A. so/a: Lg A. .\. = large A. xanthogrammica; Sm A. .\. = small A. xanthogrammica. in the anemone extracts, the significant elevation of this MAA at 4 days after feeding was apparently 20% greater than the amount available in the meal. Discussion Our data show clearly, and for the first time, that the complement of MAAs in the four North American species of Anthopleura broadly reflects the taxonomic and phylo- genetic differences among these species. This conclusion is supported by our other findings: that the profiles and con- centrations of the major MAAs are independent of the presence or absence of algal endosymbionts, the taxon of the symbionts that are present, and of several environmental factors. Nevertheless, our evidence does suggest that A. elegantissima can accumulate MAAs from its food, which may explain the temporal and local variations seen in the MAA profile, and the occurrence of minor MAAs in some individuals. These findings and others (Shick and Duiilap. 2002) lead us. finally, to consider the possibility that MAAs are synthesized de nova by the sea anemones. Phylogeny of Anthopleura spp. as deduced from their complements of MAAs In the phenogram (Fig. 7) based on the proportional complements of the four major MAAs in Anthopleura spp. from California, specimens of A. artemisia and A. xantho- grammica form distinct clades. However, unlike the phylo- genetic tre
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
