appendix b final 2008 biological surveys of los angeles and long ...

More documents

Recommendations

Info

8.0 Eelgrass 8.2.2 Side-Scan Sonar The acoustic surveys involved integration of dGPS and side-scan sonar, with the surveys focused on areas that were less than -20 feet (ft) MLLW in depth and which had previously been documented as supporting eelgrass (MEC 2002). TDI analyzed digitally collected data using an Edge Tech 272-TD side-scan sonar deployed from a 13-ft Boston Whaler. Side-scan sonar data were collected at 500 kHz with approximately 60% overlap between transects (~20 m apart) to capture all notable features. Survey operations were performed as close to shore as possible. Navigation was maintained through an onboard sonar computer as well as a redundant navigation laptop on board the survey vessel. Edge Tech Discover 560 A/D software was used to log the raw data directly from the side-scan sonar to a lap top computer for postprocessing rectification and referencing. Concurrently, sonar signal imagery was collected and processed using Chesapeake SonarWiz Map software in conjunction with a Trimble AG 122 DGPS to provide a real-time, geo-referenced mosaic of the bathymetric topography. Differential correction was provided using the Coast Guard COORS DGPS signal. Relative densities (high or low) for eelgrass communities were determined from side scan sonar imagery in conjunction with diver observations (see below) made during turion density counts. Density classifications were determined based on similar side scan sonar imagery within individual areas. Since eelgrass communities are not distributed homogeneously throughout their range, diver transects and turion counts provided the most accurate evaluation of density. Diver transects and turion counts were performed three times more frequently during the 2008 evaluation than in the previous evaluation and provided in depth insight to eelgrass communities. 8.2.3 Diver Surveys Divers verified side-scan sonar acoustic data records of identified eelgrass beds at multiple locations. They made observations to characterize the health and vigor, epiphytic load, and associated invertebrate and fish species within individual eelgrass patches. Methods included the use of 1/16 m 2 quadrats to estimate eelgrass turion density at multiple locations and to determine the extent and consistency of various eelgrass beds. After reviewing the side-scan sonar acoustic data records from subsequent mapping efforts, divers selected several locations within the most prominent eelgrass beds as targets to collect density data using linear transects along specific bathymetric contours. They deployed a small weighted buoy at each selected location and recorded dGPS coordinates and then conducted the survey using a 50 m tape and 1/16 m 2 quadrats, collecting density data within unique quadrats every 2 meters along the tape. A total of twenty-five 1/16 m 2 quadrat density counts were performed along each transect at each location. During the spring surveys, divers completed 200 quadrats at eight separate locations. During the fall, they expanded surveys to 300 quadrats at twelve separate, adding four new locations to the eight from the spring surveys. Diver transects were increased during the spring survey effort to increase the sample size and ensure that observed turions densities were representative of identified eelgrass beds. Diver transects performed in the fall used the same methodology as during the spring, but expanded sampling along a bathymetric gradient in both directions from a single point rather than just one direction. Divers performed observations 2008 Biological Surveys of Los Angeles and Long Beach Harbors 8–3 April 2010
8.0 Eelgrass adjacent to most transects within the selected eelgrass beds to ensure that density transects were representative of the surrounding area and to acquire ancillary information used for sidescan sonar density interpretations. 8.2.4 Data Analysis Statistical analysis of eelgrass distribution and turion density was consistent with previous baseline studies (MEC 2002) to provide direct comparisons between survey efforts. Turion density (turions/m 2 ) means and standard deviations were calculated for each transect. The spatial extent of eelgrass beds was calculated as acres per location and compared to previous results. Some differences in turion density sampling methodologies, including differences in the level of effort (number of quadrats sampled), are discussed below. Patch analysis was considered, but the low number of transects representing most of the eelgrass beds, patchy distribution of the beds, variable turions densities, and high density standard deviations made this approach infeasible. 8.3 RESULTS 8.3.1 Eelgrass Distribution The distribution of eelgrass beds is limited primarily by physical factors such as depth, light, and substrate, such that only limited habitat is available within the generally deep water of the Ports of Los Angeles and Long Beach. Both Ports are spatially dominated by waters greater than -20 ft MLLW depth and are well protected (e.g., by breakwaters) to accommodate marine commerce and public recreation, thus reducing circulation and water quality compared to open coastal environments. The majority of the Ports’ bathymetry is comprised of well maintained dredged channels that limit the optimum habitat available to support extensive eelgrass beds. Two areas have previously been identified that support persistent and concentrated eelgrass beds within the Port of Los Angeles: (1) Cabrillo Beach near the far west end of the outer Los Angeles Harbor, including the Cabrillo Beach Youth Facility to the north and Inner Cabrillo Beach to the south; and (2) east of Pier 300 including the shallow water mitigation habitat and Seaplane Lagoon (Figure 8.3-1). Eelgrass was introduced to the Port of Los Angeles in 1985 as a result of plantings off the Cabrillo Beach Youth Camp as part of mitigation to offset eelgrass impacts from dock construction in Huntington Harbor, although a limited amount of eelgrass was already present in the general area (Hoffman pers. comm. 2009). No eelgrass beds were observed within the boundary limits of the Port of Long Beach, but potential habitat and adjacent eelgrass beds were observed, as discussed below. 8.3.2 Results by Eelgrass Area and Season 8.3.2.1 Cabrillo Beach Spring (April) 2008 A total of 36.0 acres of eelgrass was recorded in the Cabrillo Beach area adjacent to the swim beach (“Cabrillo South”) and Cabrillo Beach Youth Facility (“Cabrillo North”) during the April 2008 surveys (Figure 8.3-2). This was comprised of 26.7 acres at the north site, and 9.33 acres 8–4 2008 Biological Surveys of Los Angeles and Long Beach Harbors April 2010
Page 1 and 2:
APPENDIX B FINAL 2008 BIOLOGICAL SU
Page 4:
FINAL 2008 BIOLOGICAL SURVEYS OF LO
Page 7 and 8:
Table of Contents 3.4.3 Summary of
Page 9 and 10:
Table of Contents 8.2.1 Aerial Phot
Page 11 and 12:
Table of Contents Table 3.4-2. Tabl
Page 13 and 14:
Table of Contents Table 8.3-3. Tabl
Page 15 and 16:
Table of Contents Figure 6.2-1. Rip
Page 17 and 18:
Table of Contents This page intenti
Page 19 and 20:
Executive Summary otter trawls to s
Page 21 and 22:
Executive Summary Van Veen) and ana
Page 23 and 24:
Executive Summary which was collect
Page 26 and 27:
1.0 Introduction 1.0 INTRODUCTION T
Page 28 and 29:
1.0 Introduction 1.4 STUDY OBJECTIV
Page 30 and 31:
1.0 Introduction Historical compari
Page 32 and 33:
1.0 Introduction Figure 1.1-2. Map
Page 34:
CHAPTER 2 WATER QUALITY
Page 37 and 38:
2.0 Water Quality The CTD was deplo
Page 39 and 40:
2.0 Water Quality Outer Harbor area
Page 41 and 42:
2.0 Water Quality Table 2.2-1. Wate
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
2.0 Water Quality Figure 2.2-1. Wat
Page 49 and 50:
2.0 Water Quality This page intenti
Page 52 and 53:
3.0 Adult and Juvenile Fishes 3.0 A
Page 54 and 55:
3.0 Adult and Juvenile Fishes speci
Page 56 and 57:
3.0 Adult and Juvenile Fishes and b
Page 58 and 59:
3.0 Adult and Juvenile Fishes sampl
Page 60 and 61:
3.0 Adult and Juvenile Fishes No si
Page 62 and 63:
3.0 Adult and Juvenile Fishes croak
Page 64 and 65:
3.0 Adult and Juvenile Fishes gobie
Page 66 and 67:
3.0 Adult and Juvenile Fishes Table
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
3.0 Adult and Juvenile Fishes Figur
Page 88 and 89:
Page 90 and 91:
Page 92:
CHAPTER 4 ICHTHYOPLANKTON
Page 95 and 96:
4.0 Ichthyoplankton studies (Horn a
Page 97 and 98:
4.0 Ichthyoplankton more likely to
Page 99 and 100:
4.0 Ichthyoplankton The results of
Page 101 and 102:
4.0 Ichthyoplankton Table 4.3-1. To
Page 103 and 104:
4.0 Ichthyoplankton Table 4.3-2. To
Page 105 and 106:
4.0 Ichthyoplankton Table 4.3-4. We
Page 107 and 108:
4.0 Ichthyoplankton Table 4.3-5. We
Page 109 and 110:
4.0 Ichthyoplankton Table 4.3-6. Se
Page 111 and 112:
4.0 Ichthyoplankton Table 4.5-1. Ar
Page 113 and 114:
4.0 Ichthyoplankton LA05 LA14 2D St
Page 116 and 117:
5.0 Benthic and Epibenthic Inverteb
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 136 and 137: 5.0 Benthic and Epibenthic Inverteb
Page 144: CHAPTER 6 RIPRAP BIOTA
Page 147 and 148: 6.0 Riprap Biota diver collection m
Page 149 and 150: 6.0 Riprap Biota relatively small b
Page 151 and 152: 6.0 Riprap Biota sea cucumber (Para
Page 153 and 154: 6.0 Riprap Biota polychaete worms.
Page 155 and 156: 6.0 Riprap Biota Table 6.3-1. Mean
Page 163 and 164: 6.0 Riprap Biota Figure 6.2-1. Ripr
Page 166 and 167: 7.0 Kelp and Macroalgae 7.0 KELP AN
Page 168 and 169: 7.0 Kelp and Macroalgae the laborat
Page 170 and 171: 7.0 Kelp and Macroalgae sediment us
Page 172 and 173: 7.0 Kelp and Macroalgae Overall, ou
Page 174 and 175: 7.0 Kelp and Macroalgae pose a sign
Page 176 and 177: 7.0 Kelp and Macroalgae Figure 7.2-
Page 182: CHAPTER 8 EELGRASS
Page 185: 8.0 Eelgrass distribution of eelgra
Page 189 and 190: 8.0 Eelgrass load on the plants was
Page 191 and 192: 8.0 Eelgrass (Table 8.3-5), based o
Page 193 and 194: 8.0 Eelgrass surveys. No eelgrass b
Page 195 and 196: 8.0 Eelgrass Areas containing eelgr
Page 197 and 198: 8.0 Eelgrass Seasonal patterns amon
Page 199 and 200: 8.0 Eelgrass 2002) inferred that th
Page 201 and 202: 8.0 Eelgrass Table 8.3-2. Spring 20
Page 203 and 204: 8.0 Eelgrass Table 8.3-4. Fall 2008
Page 209 and 210: 8.0 Eelgrass Table 8.3-12. Oceanic
Page 211 and 212: 8.0 Eelgrass Figure 8.3-2. Eelgrass
Page 215 and 216: 8.0 Eelgrass Figure 8.3-6. Spatial
Page 220 and 221: 9.0 Birds 9.0 BIRDS 9.1 INTRODUCTIO
Page 222 and 223: 9.0 Birds changes in species number
Page 224 and 225: 9.0 Birds the Brown Pelican populat
Page 226 and 227: 9.0 Birds 9.4.2.10 9.4.2.11 9.4.2.1
Page 228 and 229: 9.0 Birds 9.5.1 Distribution and Ab
Page 230 and 231: 9.0 Birds discussed in Section 9.4.
Page 232 and 233: 9.0 Birds Angeles Harbor. The relat
Page 234 and 235: 9.0 Birds Table 9.4-1. Percent Comp
Page 236 and 237:
9.0 Birds Table 9.4-3. Nest Numbers
Page 238 and 239:
9.0 Birds Table 9.5-2. Species Comp
Page 240 and 241:
9.0 Birds Table 9.5-4. Percent Comp
Page 242 and 243:
9.0 Birds Table 9.6-1. Historical C
Page 244 and 245:
9.0 Birds 70 12000 60 10000 50 40 3
Page 246 and 247:
9.0 Birds 3500 shallow water sandy
Page 248 and 249:
9.0 Birds 40 35 30 riprap aerial Nu
Page 250 and 251:
9.0 Birds Number Observed 3500 3000
Page 252 and 253:
9.0 Birds Figure 9.5-1. Total numbe
Page 254 and 255:
9.0 Birds Number of Individuals 400
Page 256 and 257:
9.0 Birds 7000 Mean Number of Indiv
Page 258:
CHAPTER 10 MARINE MAMMALS
Page 261 and 262:
10.0 Marine Mammals Gray whales dif
Page 263 and 264:
10.0 Marine Mammals This page inten
Page 266 and 267:
11.0 References 11.0 REFERENCES Abb
Page 268 and 269:
11.0 References Dennison, W.C. and
Page 270 and 271:
11.0 References Jacques, D.L., C.S.
Page 272 and 273:
11.0 References North, W.J. 1983. S
Page 274:
APPENDIX A STATION LOCATIONS
Page 277 and 278:
Appendix A Station Coordinates (NAD
Page 280 and 281:
Appendix B (A) Temperature (°C), S
Page 282 and 283:
Page 284 and 285:
Page 286 and 287:
Page 288 and 289:
Page 290 and 291:
Page 292 and 293:
Page 294 and 295:
Page 296 and 297:
Page 298 and 299:
Page 300 and 301:
Page 302 and 303:
Page 304 and 305:
Page 306 and 307:
Page 308 and 309:
Page 310:
APPENDIX C FISHES
Page 313 and 314:
Appendix C Table C-1. Combined Fish
Page 315 and 316:
Appendix C LA01 LA02 LA03 LA04 LA05
Page 317 and 318:
Appendix C Table C-3. Otter Trawl C
Page 319 and 320:
Page 321 and 322:
Page 323 and 324:
Appendix C Table C-5. Otter Trawl B
Page 325 and 326:
Page 327 and 328:
Page 329 and 330:
Appendix C Table C-7. Otter Trawl B
Page 331 and 332:
Appendix C Table C-8. Lampara Catch
Page 333 and 334:
Appendix C Table C-10. Lampara Catc
Page 335 and 336:
Appendix C Scientific Name Table C-
Page 337 and 338:
Appendix C Table C-14. Beach Seine
Page 340 and 341:
Appendix D Table D-1. Ichthyoplankt
Page 342 and 343:
Appendix D fish eggs (undeveloped)
Page 344 and 345:
Appendix D fish eggs unid. unidenti
Page 346 and 347:
fish eggs unid. unidentified fish e
Page 348 and 349:
Appendix D Eggs Oligocottus / Clino
Page 350 and 351:
Appendix D Eggs Rhinogobiops nichol
Page 352 and 353:
Appendix D Juvenile Eggs Heterostic
Page 354 and 355:
Appendix D Eggs Liparis spp. snailf
Page 356 and 357:
Appendix D Juvenile Eggs Heterostic
Page 358 and 359:
Appendix D Table D-11. Ichthyoplank
Page 360:
APPENDIX E INFAUNA
Page 363 and 364:
Appendix E Taxon LA-1 LA-10 LA-11 L
Page 365 and 366:
Page 367 and 368:
Page 369 and 370:
Page 371 and 372:
Page 373 and 374:
Appendix E Protothaca laciniata Tax
Page 375 and 376:
Page 377 and 378:
Page 379 and 380:
Appendix E Taxon LA1 LA2 LA3 LA4 LA
Page 381 and 382:
Appendix E Table E-4. Otter Trawl,
Page 383 and 384:
Appendix E Taxon LA1 LA2 LA3 LA4 LA
Page 385 and 386:
Appendix E Octopus sp. 1 Philine sp
Page 387 and 388:
Appendix E This page intentionally
Page 390 and 391:
Appendix F Table F-1. Total Abundan
Page 392 and 393:
Appendix F LARR-1 LARR-2 LARR-3 LAR
Page 394 and 395:
Page 396 and 397:
Page 398 and 399:
Page 400 and 401:
Page 402 and 403:
Page 404 and 405:
Page 406 and 407:
Page 408 and 409:
Page 410:
APPENDIX G KELP AND MACROALGAE
Page 413 and 414:
Appendix G Date Survey Site Observe
Page 415 and 416:
Page 417 and 418:
Page 419 and 420:
Page 421 and 422:
Page 423 and 424:
Page 425 and 426:
Page 427 and 428:
Page 429 and 430:
Page 431 and 432:
Appendix G Species T1 T2 T3 T4 T5 T
Page 434 and 435:
Appendix H APPENDIX H-1 AVIAN ECOLO
Page 436 and 437:
Appendix H Table H-1. Avian Ecologi
Page 438 and 439:
Appendix H GUILD 8 - UPLAND BIRDS G
Page 440 and 441:
Appendix H APPENDIX H-2 NUMBER OF I
Page 442 and 443:
Appendix H Table H-2. December A 20
Page 444 and 445:
Appendix H Table H-3. December B 20
Page 446 and 447:
Appendix H Table H-4. January A 200
Page 448 and 449:
Appendix H Table H-5. January B 200
Page 450 and 451:
Appendix H Table H-6. February A 20
Page 452 and 453:
Appendix H Table H-7. February B 20
Page 454 and 455:
Appendix H Table H-8. March A 2008
Page 456 and 457:
Appendix H Table H-9. March B 2008
Page 458 and 459:
Appendix H Table H-10. April A 2008
Page 460 and 461:
Appendix H Table H-11. May A 2008 S
Page 462 and 463:
Appendix H Table H-13. July A 2008
Page 464 and 465:
Appendix H Table H-15. August B 200
Page 466 and 467:
Appendix H Table H-16. September A
Page 468 and 469:
Appendix H Table H-17. September B
Page 470 and 471:
Appendix H Species Totals Zones 1 2
Page 472 and 473:
Appendix H Species Totals Zones 1 2
Page 474 and 475:
Appendix H Zones Species Totals 1 2
Page 476 and 477:
Appendix H Zones Species Totals 1 2
Page 478 and 479:
Appendix H Date ELEGANT TERN — OB
Page 480:
APPENDIX I MARINE MAMMALS
Page 483 and 484:
Appendix I Common Survey Station/ N
Page 485 and 486:
Appendix I Common Name Survey Type
Page 487 and 488:
Page 489 and 490:
Page 491 and 492:
Page 493:
Appendix I This page intentionally
show all

appendix b final 2008 biological surveys of los angeles and long ...

Create successful ePaper yourself

Delete template?

Save as template?