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CHAPTER 6. INITIAL COLONISATION OF DISTURBED SEDIMENTS: THE . 131 EFFECTS OF A BIOGENIC SPECIES ON COMMUNITY ESTABLISHMENT Introduction . . 131 Methods . 134 Experimental design . 134 Data analyses . . 138 Results. . 141 Univariate analysis of species abundances . 141 Size-frequency analysis . 144 Multivariate analysis of community structure. . 149 Sediment water, organic and silt/clay contents . 162 Redox potentials . 162 Discussion . . 164 CHAPTER 7. THE MICRO-SCALE SPATIAL PATTERNS OF PYGOSPIO . . 172 ELEGANS WITHIN SMALL-SCALE PATCHES AND THE ROLES OF INTRA- AND INTERSPECIF1C INTERACTIONS AND ABIOT1C EFFECTS. Introduction . . 172 Methods . 175 Experimental design . 175 Data analyses . . 177 Results. . 179 Pilot survey . . 179 Transect survey - Micro-scale patterns of P. elegans . . 181 Sediment water, organic and silt/clay contents . 190 Discussion . . 195 CHAPTER 8. THE FAUNAL COMMUNITIES OF PYGOSPIO ELEGANS . . 201 PATCHES. Introduction . 201 Methods . 204 Results. . 205 Univariate analysis of species abundances . 205 Size-frequency analysis . 208 Multivariate analysis of community structure. . 213 Sediment water, organic and silt/clay contents . 223 Redox potentials . 223 Discussion . . 226 viii
CHAPTER 9. GENERAL DISCUSSION . . 234 REFERENCES . . 244 APPENDICES . . 275 Appendix 1.1 : Species abundances from lm survey, plots 1-64 . . 275 Appendix 1.2 : Species abundances from 8m survey, plots 1-64 . . 278 Appendix 1.3 : Species abundances from 40m survey, plots 1-63 . . 281 Appendix 2 : Species abundances from micro-scale survey . . 284 ix
- Page 1 and 2: AN INVESTIGATION INTO THE PROCESSES
- Page 3 and 4: ABSTRACT The spionid polychaete Pyg
- Page 5 and 6: ACKNOWLEDGEMENTS I am indebted to m
- Page 7: Results. . 65 Size distribution of
- Page 11 and 12: Figure 5.4 Figure 5.5 Figure 6.1 Fi
- Page 13 and 14: LIST OF TABLES Table 2.1 Statistica
- Page 15 and 16: BACKGROUND CHAPTER 1 INTRODUCTION A
- Page 17 and 18: The scales of observation, or the s
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- Page 21 and 22: aised sediment within an otherwise
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- Page 28 and 29: E 7— E 6-ac. MHWS MHWN t co 4 —
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- Page 34 and 35: Holme and McIntyre (1984). Percenta
- Page 36 and 37: Pattern Analysis - Grid Surveys Sur
- Page 38 and 39: 57 64 1=1 0 0 0 0 0 0 0 O 0 0 0 0 0
- Page 40 and 41: Maps produced by kriging and other
- Page 42 and 43: 200 180 1160 140 100 1-3 80 g 60 c.
- Page 44 and 45: 2.5 1.5 0.5 0 3 T (i) % Silt/clay%
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- Page 56 and 57: 8m survey - spatial patterns Figure
CHAPTER 9. GENERAL DISCUSSION . . 234<br />
REFERENCES . . 244<br />
APPENDICES . . 275<br />
Appendix 1.1 : Species abundances from lm survey, plots 1-64 . . 275<br />
Appendix 1.2 : Species abundances from 8m survey, plots 1-64 . . 278<br />
Appendix 1.3 : Species abundances from 40m survey, plots 1-63 . . 281<br />
Appendix 2 : Species abundances from micro-scale survey . . 284<br />
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