Biological Invasions of Cold-Water Coastal Ecosystems - Aquatic ...

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Chapt 9C1. Marine Plants, page 9C1- 15 The Total Number of Species and Species Composition of the Individual Sites. The overall number of species was 155 for all sites, but the numbers of species per site ranged from only 10 to 71 species, indicating that there is considerable variation in species composition among habitats (Table 9C1.7, Fig. 9C1.1, 9C1.2). The 21 new records across all areas ranged from 1 to 9 at the individual sites and was highest on floats. The highest species count (71 species) occurred at Green Island, the most exposed and highly saline site. At this site, the proportion of red algal species was nearly 2 times that of the brown algae and 4 times that of the greens. The lowest species count (10 species) occurred at Cloudman Bay, a sheltered, estuarine mud bay. At this site there were almost no red algae, and the brown algae were more abundant than the greens. Table 9C1.7. Total Species Numbers and Composition at Each Site, June 1998 Taxonomic Group Val Cor Whit CB SMB Gro RP Bus Green NW Floats Total* V-Total** Rhodophyceae 18 12 23 1 15 26 27 27 40 37 5 69 84 Phaeophyceae 13 11 14 5 20 24 23 21 21 22 16 49 52 Chlorophyceae 14 16 17 3 9 12 9 8 10 9 4 30 36 Xanthophyceae 1 1 0 0 0 0 0 0 0 0 0 1 1 Seagrasses 1 1 1 1 1 1 1 3 0 0 0 3 3 Lichens 0 0 1 0 0 0 1 0 0 1 0 1 2 Cyanophyceae 0 0 0 0 0 0 0 0 0 0 2 2 2 TOTALS 47 41 56 10 45 63 61 59 71 69 27 155 180 NEW RECORDS 5 5 2 2 5 4 2 2 6 1 9 21 23 Abbreviations: Sites as in Table 1; Val=the Port Valdez collections combined; Floats=the float collections combined; Total*=with overlap and earlier collections excluded; V-Total**=Total* with the Port Valdez Checklist species included. Figure 9C1.2. Total Species Numbers and Composition at each Site, June 1998 80 70 60 Total Species 50 40 30 20 10 0 Val Cor Whit CB SMB Gro RP Bus Green NW Floats Collecting Sites Rhodophyceae Phaeophyceae Chlorophyceae Xanthophyceae Seagrasses Lichens Cyanophyceae Total Species Numbers and Composition in each Habitat Type. Since several sampling sites had mixed habitats, categorizing the sites into distinct habitat types had some weaknesses. However, it increased the number of species sampled for each category of habitat, providing more power to the data analysis (Table 9C1.8, Fig. 9C1.3a, b).
Chapt 9C1. Marine Plants, page 9C1- 16 TABLE 9C1.8. Habitat Type and Species Composition Taxonomic Group Valdez Harbors Mud Bays Rk Bays Headlands Floats Total Rhodophyceae 18 37 31 37 48 5 69 Phaeophyceae 13 22 31 22 30 16 49 Chlorophyceae 14 25 15 9 14 4 30 Xanthophyceae 1 1 0 0 0 0 1 Seagrasses 1 1 1 0 3 0 3 Lichens 0 1 0 1 1 0 1 Cyanophyceae 0 0 0 0 0 2 2 Total 47 87 78 69 96 27 155 Fig 3a. Habitat Type and Species Composition 120 100 Total Species 80 60 40 20 0 Valdez Harbors Mud Bays Rk Bays Headlands Floats Habitat Type Rhodophyceae Phaeophyceae Chlorophyceae Xanthophyceae Seagrasses Lichens Cyanophyceae Fig. 3b. Habitat Type and Percentage Composition 100% 80% Percentage Composition 60% 40% 20% 0% Valdez Harbors Mud Bays Rk Bays Headlands Floats Habitat Type Rhodophyceae Phaeophyceae Chlorophyceae Xanthophyceae Seagrasses Lichens Cyanophyceae
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page i BIOLOGICAL INVASIONS OF COLD
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page iii • Stephan Benda, Valdez
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page v • From an industry and man
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page vii • The magnitude of seaso
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page ix • The voyage duration of
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page xi microscopes for the study.
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page xiii 9C9. Echinoderms 9C9-1 9C
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Chapt 1. Introduction, page 1- 2 pa
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Chapt 3. Biological Characteristics
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Appendix Table 9C4.5. Continued Cha
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Chapt 9C6 Decapod Crustaceans, page
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Chapt 9C9. Echinoderms, page 9C9- 2
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Chapt 9C10. Ascidians, page 9C10- 2
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Chapt 9D. Fouling Community Surveys
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Chapt 10. Biodiversity, page 10- 2
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