12th International Conference on Harmful Algae

More documents

Recommendations

Info

INTERNATIONAL SOCIETY FOR THE STUDY OF HARMFUL ALGAE12 th <strong>International</strong> <strong>Conference</strong> on Harmful Algae, Copenhagen, Denmark, 4-8 September 2006PO.07-14Paralytic shellfish poisoning inthe North Sea – a secularperspectiveSession: PO.07 - Ecology andoceanographyT Wyatt 1 , F Jordan 21 Instituto de Investigaciones Marinas,VIGO, Spain2 Collegium Budapest, BUDAPEST,HungaryParalytic shellfish poisoning (PSP)has been a recognized medicalsyndrome since the late eighteenthcentury, despite the rarity ofdiagnoses. European records from1827 to 1967 (140 years) in whichthe clinical symptoms areunequivocal number only about 100cases distributed between nineoutbreaks, mostly in the UnitedKingdom (UK). Since 1968,following a major episode in the UKthat year, monitoring programmesindicate that the risk of poisoninghas been high most years, and thatin the absence of public healthinitiatives would almost certainlyhave led to many more cases. Thuson the basis of its clinical incidenceprior to 1968, and monitoring sincethen, an abrupt ‘regime shift’ hasapparently occurred which hasprobably led to increasedabundance of the toxic agent,Alexandrium tamarense, since the1960s. Some recent studiesindicate that there may have beensignificant phenological trends inNorth Sea dinoflagellates, but theclinical evidence does notunambiguously support a climaticinterpretation in this case. Thispaper uses network analysis, inwhich fishing plays a major role, toexplore the question.PO.15-07Moving towards an operationalharmful algal bloom forecastingsystem in Texas (USA)Session: PO.15 - MonitoringTT Wynne 1 , RP Stumpf 1 , MCTomlinson 1 , TA Villareal 2 , K Wiles 3 , GHeideman 3 , M Byrd 4 , D Buzan 4 , LCampbell 51 NOAA/NOS, SILVER SPRING, UnitedStates of America2 University of Texas at Austin, PORTARANSAS, United States of America3 Texas Department of State Health Service,AUSTIN, United States of America4 Texas Parks and Wildlife Department,AUSTIN, United States of America5 Texas A&M University, COLLEGESTATION, United States of AmericaBlooms of the toxic harmful algae,Karenia brevis, have beenpersistent and problematic in theGulf of Mexico (USA) for decades.A heuristic ecological model basedon satellite imagery has beenshown to be effective in identifyinglikely Karenia blooms in the easternGulf of Mexico (Florida). 'New'blooms are identified by satellite,and those blooms that meet certaincriteria are identified as likelyKarenia. The method is core to thedetection component of theoperational Harmful Algal Bloom(HAB) forecast deployed by theNational Oceanic and AtmosphericAdministration (NOAA), in October2004. The Texas coast commonlyhas false positives resulting fromfrequent resuspension events. Themethod was modified tocompensate for these events.However, because of theinfrequency of Karenia HABs alongthe Texas coast, only one majorbloom event coincided withavailable SeaWiFS imagery. Thisevent was used to validate themethods presented by Wynne et al.305
INTERNATIONAL SOCIETY FOR THE STUDY OF HARMFUL ALGAE12 th <strong>International</strong> <strong>Conference</strong> on Harmful Algae, Copenhagen, Denmark, 4-8 September 2006(2005). Since the publication of thispaper the Texas coastlineexperienced a major bloom in 2005.This presentation will demonstratethe efficacy of the algorithm using insitu cell count data collected fromthis event. This algorithm will thenbe used to expand NOAA’s HABforecast system to include Texas.PO.10-48Intracellular phosphorusregulates alkaline phosphataseactivity of Karenia mikimotoi(Dinophyceae) and Skeletonemacostatum (Bacillariophyceae)Session: PO.10 – Ecophysiology andautecologyH Yamaguchi 1 , S. Ukita 2 , M Adachi 3 , MYamaguchi 41 Kochi University, KOCHI, Japan2 Hiroshima University, HIROSHIMA, Japan3 Kochi University, KOCHI, Japan4 FEIS, Fisheries Research Agency,HIROSHIMA, JapanAlkaline phosphatase (AP) plays animportant role in utilization oforganic phosphorus by unicellularalgae. AP activity has beenrecognized to be regulated by theexternal phosphate concentration.In the present study, however, weclearly showed that AP activity ofharmful algae Karenia mikimotoiand Skeletonema costatum wasdirectly regulated by the intracellularphosphorus content, not by theexternal phosphate. Underphosphorus-limited steady stateconditions in semi-continuousculture, relationships among APactivity, external phosphate andintracellular phosphorus content (Q)were examined. A significantnegative correlation was foundbetween AP activity and Q of K.mikimotoi. In the case of S.costatum, AP activity increased withincreasing Q and reached amaximum of ca. 4 fmol/cell, then theactivity decreased with increasingthe Q. The threshold values of Q forinducing AP activities in bothspecies were much higher than theminimum cell quota for their growth.The results indicate that theintracellular phosphorusconcentration is fundamentallyimportant to understand APregulation and organic phosphorusutilization of harmful algae.PO.11-09Allelopathic interactions betweenthe bacillariophyte Skeletonemacostatum (Greville) Cleve and theraphidophyte Heterosigmaakashiwo (Hada) Hada ex Hara etChiharaSession: PO.11 - AllelopathyY Yamasaki, S Nagasoe, T Matsubara,T Shikata, Y Shimasaki, Y Oshima, THonjoGraduate School, Kyushu University,FUKUOKA, JapanGrowth interactions betweenSkeletonema costatum andHeterosigma akashiwo wereinvestigated by bi-algal culturesunder axenic conditions. Whenthese species were inoculated athigh cell densities, growth of bothspecies was coincidentallysuppressed. In other combinationsof inoculation density, the speciesthat first reached the stationaryphase seemed to be responsible fora remarkable decrease of the otherspecies’ density. When bothspecies were cultured without cellcontact, growth of S. costatum andH. akashiwo were both suppressed.Furthermore, regardless of nutrientre-enrichment, filtrates from S.costatum and H. akashiwo thickcultures mutually decreased themaximum cell densities. Therefore,306
Page 1 and 2:
INTERNATIONAL SOCIETYFOR THE STUDY
Page 3 and 4:
Dear participantWelcome to Denmark
Page 5 and 6:
INTERNATIONAL SOCIETY FOR THE STUDY
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
Page 195 and 196:
Page 197 and 198:
Page 199 and 200:
Page 201 and 202:
Page 203 and 204:
Page 205 and 206:
Page 207 and 208:
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
Page 221 and 222:
Page 223 and 224:
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
Page 231 and 232:
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
Page 243 and 244:
Page 245 and 246:
Page 247 and 248:
Page 249 and 250:
Page 251 and 252:
Page 253 and 254:
Page 255 and 256: INTERNATIONAL SOCIETY FOR THE STUDY
Page 305: INTERNATIONAL SOCIETY FOR THE STUDY
Page 357 and 358:
Page 359 and 360:
Page 361 and 362:
Page 363 and 364:
Page 365 and 366:
Page 367 and 368:
Page 369 and 370:
Page 371 and 372:
Page 373 and 374:
Page 375 and 376:
Page 377 and 378:
Page 379 and 380:
Page 381 and 382:
Page 383 and 384:
Page 385 and 386:
Page 387 and 388:
Page 389 and 390:
Page 391 and 392:
Page 393 and 394:
Page 395 and 396:
Page 397 and 398:
Page 399 and 400:
Page 401 and 402:
Page 403 and 404:
show all

12th International Conference on Harmful Algae

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?