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N/C 20 40 60 80 100 120 140 160 180 Days FIGURE 5. Evolution du rapport Nematodes /Copepodes dans les quatre premiers centimetres du sediment pendant les six mois d' experience. Temoin : 0; Module faiblement pollue : o o; Module fortement : pollue • •. La figure 5 montre l'evolution de ce rapport dans les trois mo- le bac dules experimentaux. Les valeurs sont d'autant plus fortes que est plus pollue par les hydrocarbures . Ainsi le temoin presente tou- jours des valeurs faibles comprises entre 1.07 et 12.40 (moyenne : 5.04 ±0.50 par 33 mesures en six mois). Le bac faiblement pollue presente des valeurs legerement plus fortes et plus variables comprises entre 1.64 et 20.07 : (moyenne 7.81 ± 0.78 par 32 mesures). Enfin le module fortement pollue presente des valeurs nettement plus elevees mais fluctuantes. Deux periodes correspondant a des fortes valeurs peuvent etre distinguees entre 22 et 50 jours (N/C = 37 a 51) et entre 124 et 188 jours (N/C = 16 a 71) separees par une periode de faible valeur a 71 jours (N/C = 5 a 14). 236
La sensibilite de cet indice semble done se confirmer puisqu'un accroissement sensible est discernable apres 25 jours d'experience dans le bac fortement pollue du fait de la quasi disparition des Copepodes, alliee a une proliferation des Nematodes. La generalisation de son utilisation demande cependant de preciser les modalites de ces fluctuations dans differentes conditions experimentales en tenant compte des changements de la composition specifique aussi bien des Nematodes que des Copepodes et de leur niveau de competition pour la nourriture par exemple (Warwick 1981). II est probable que le retour de ce rapport a des valeurs faibles dans le bac le plus pollue corres- pond a un changement de la composition faunistique des Copepodes. Evolution des parametres Abondance, Biomasse et Diversite. La plupart des etudes utilisant les modifications de la macro- faune pour mettre en evidence 1' impact des pollutions preconisent l'emploi de parametres simples tels le nombre d'especes, 1' abondance et la biomasse (Pearson et al. 1978; Glemarec et al.1981 entre autres) Cette approche pose pour 1' instant de serieux problemes methodologiques en ce qui concerne la Meiofaune. Les progres realises dans la systematique des groupes dominants des Nematodes et des Copepodes permettent d'envisager raisonnablement la determination de routine du nombre d'especes dans un echantillon representatif de la population (100 a 300 individus) malgre la grande diversite de ces groupes. II n'en est pas de meme en ce qui concerne 1' evolution de la biomasse du meiobenthos dans un echantillon donne. En effet, les methodes actuellement utilisees posent generalement l'hypothese que la biomasse moyenne ne varie pas au cours du temps, ce qui n'est bien sur pas le cas. Elles consistent par consequent soit a evaluer les biovolumes a la chambre claire d'un microscope en utilisant des formules d'equivalence (Andrassy 1956; Wieser 1960; Juario 1975), soit a peser a la microbalance de precision un unique lot de quelques centaines a quelques milliers d' individus (De Bovee 1981; Guille et al. 1968). red Les comme resultats presentes dans cet article doivent etre conside- la mise au point d'une methode d' evaluation des indices volumiques sur la meiofaune qui permet d'analyser rapidement chaque prelevement et evite les incertitudes des methodes de pesee. Chacun des lots de 100 specimens montes entre lame et lamelle pour la determination a ete grossi cent fois grace a un projecteur de profil. Les contours de chaque individu identifie ont ete traces puis analyses a la table digitalisante d'un analyseur d' images. Le volume a ete calcule et exprime en poids sec en utilisant une valeur de densite de 1,13 (Wieser 1960) et un rapport Poids sec/Poids frais = 0,25. Les autres parametres classiquement utilises tels que nombre d'especes (S) , Indice de diversite de Fisher et al. (a), Indice de diversite de Shannon (H) et Equitabilite de Pielou (J) ont ete aussi calcules au temps zero, 36 jours (avant la chute de densite) et 93 jours (apres la chute de densite) de l'experience dans chacun des trois modules sur des echantillons de 100 individus (Tableau I). Dans le bac temoin, 1 'evolution du poids sec individuel n'indique pas de fluctuations signif icatives puisque les limites des intervalles de confiance de la moyenne se recoupent (0.088 a 0.207 ug PS/individu) . 237
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Na/JA/CNfiXO 0
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ECOLOGICAL STUDY OF THE AMOCO CADIZ
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Preface TABLE OF CONTENTS I. Physic
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PREFACE At approximately 11:30 p.m.
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In November 1979, an international
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CNEXO-NOAA Joint Scientific Commiss
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MICROBIAL HYDROCARBON DEGRADATION W
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Chemical Hydrocarbon Analyses Perfo
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147, 156, 170, 178, 184, 192, 198,
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The microbial hydrocarbon biodegrad
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TABLE 7. Biodegradation of 9-methyl
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The detailed gas-chromatographic an
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TABLE 13. Hydrocarbon concentration
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TABLE 17. Hydrocarbon concentration
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TTTl n rrffl KMIIMCi WOU^I ! I .Dm.
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o z o 5- 3- UJ >4 UJ - cc 2- I ll F
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z o 4. 3_ 2- t- 1 _ < K o z o 1_ o
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CONCLUSIONS Microbial degradation a
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LIQUID 5AK?lE CCNTftit-'JGAriOH + F
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The saturated hydrocarbons were mos
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acteria of the genus Moraxella, ind
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2. CONTINUOUS CULTURES In continuou
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INTRODUCTION All fate and effects s
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2.1 Sediments and Sediment Cores (E
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TABLE 2. Focus of GC/MS analyses. S
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T.ssue Semoie S50 grams Wet) HI Dis
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ae = E3£\CE '.tC'-SSE S* -•* 3 S
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TABLE 3A. Weathering of AMOCO CADIZ
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fli-Liftim Mi.u".- i I 7 1 1 5 6 /
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3.2 Surface Sediments (Atlas, Unive
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_l I I I I I L_ a •BIOGENIC P •
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TABLE 6. Replication of hydrocarbon
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-I—i i i i i i i i—i—i—I t
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t i I hn I 94 n,, , i i I ABCOEFGHI
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C30BT:177ng g 1 * ? » I—I—I I
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marker compounds, the C3 dibenzothi
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TABLE 8. AMOCO CADIZ sediment sampl
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TABLE 11. St. Michel en Greve/Lanni
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TABLE 14. L'Aber Benoit GC/MS resul
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3.4 Sediment Cores (Ward, Montana S
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' TABLE 16. L'Aber Wrac h sediment
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!•[ 220 = f occEMeea 1979 AUGUST
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10 120 1000 no g 400 600 ALU ISO AL
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The AMC-4 cores appear dominated by
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3.5 Oysters and Plaice (Neff, Batte
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The GC traces for the impacted oyst
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m/e m/8 m/e Lja.i t: J b l| c I "II
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-* I I I I ABCDEFGH IJ K LMNOPQRSTU
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AROMA IK S SATURATES 4-1 FIGURE 3.7
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TABLE 20. AMOCO CADIZ chemistry pro
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TABLE 24. Results of ISTPM fish ana
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3.7 Seaweed and Sediments (Topinka,
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ma. w p FIGURE 3.81. HC-4-1 seaweed
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9) Oysters were initially heavily i
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STUDIES OF HYDROCARBON CONCENTRATIO
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sample 1 - extraction (toluene meth
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TABLE 1. Hydrocarbon content of lie
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TABLE 3. Chromatographic analysis o
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1A _jiU' IB •JlIw '3 L Pr i 2A 2B
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CD o 0. - f 2104 "*. vli . ! i » -
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A IB A HC. SATURES S M C C [HiLJJL
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The relative contents of saturated
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31-03-78 22-11-78 20-06-79 17-1-80
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PORTSALL 23-3-78 FPD AW 22-11- 78 F
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31-03-78 22-11-78 20 - 06 - 79 17-
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STATION 6 i—r 3400 3000 1600 31-0
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PORTSALL 23-3-78 FPD AW 22-11-78 FP
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Photometry Detection (FPD) as well.
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1 r PIODUI7S F.ECUPEF.ES BRUT DECAN
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The chromatogram of the saturated h
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etween the end of March and early A
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certain chemical species which are
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It should be noted that a sample ta
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REFERENCES CITED Aminot, A., 1981,
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affected a very large section of th
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OIL POLLUTION IN THE WESTERN ENGLIS
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atio of more than 100 is an index o
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TABLE 4. Comparison between hydroca
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FIGURE 7. Sampling stations in the
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IBB 000,- HC CPPM] ib me. lass. 100
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ACKNOWLEDGMENTS We would particular
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METHANE-PRODUCING BACTERIA POLYMERI
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AMOCO CAQiZ ® BE" 'LOUT U A8ER .^"
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and methanolic (f~) fractions for o
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14 99%) from New England Nuclear; n
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concentrations were extremely low (
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(A) Oiled Estuary Mudtiat cms " i l
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TABLE 3. Aromatic Hydrocarbons in B
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TABLE 4. 11 *C0 2 + 1
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IGO 3-6 cm slurry IGO 3-6cm slurry
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FRESH OIL hk UjlAdU-uJM^vA. i^w*XaA
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TABLE 7. Effect of AMOCO CADIZ Mous
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14 TABLE 10. Effect of Hydrocarbons
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pounds were, however, noted at dept
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effects of additional heavy oiling.
Page 202 and 203: Centre Nationale pour ' 1 Exploitat
Page 204 and 205: S^rensen, J., D. Christensen, and B
Page 207 and 208: REPONSES DES PEUPLEMENTS SUBTIDAUX
Page 209 and 210: Les nouvelles populations caracteri
Page 211 and 212: TABLEAU I. L' evolution des peuplem
Page 213 and 214: B Dui © ® Du 2 © Sf FIGURE 4. Ev
Page 215 and 216: populations initiales durant la pre
Page 217 and 218: vs w DU w VS/ FV W DU,B SHV W ' \ /
Page 219: Connell, J.H. et R.O. Slatyer, 1977
Page 222 and 223: Les unites cenotigues correspondant
Page 224 and 225: les peuplements de la baie de Morla
Page 226 and 227: R, E c a ~ a H CO 3 -> E ;j cu R. a
Page 229 and 230: -
Page 231 and 232: leurs du meme ordre qu'avant la pol
Page 233 and 234: N/m 10 10 10 10 • -* Cycle normal
Page 235 and 236: 3.2.3.2) Peuplement des sables tres
Page 237 and 238: Richesse specifique (fig. 10) D'avr
Page 239 and 240: N.m-2 300^ 250 200- 150 100 50 -•
Page 241 and 242: propor tionnels aux quantities d'hy
Page 243 and 244: Den HARTOG, C. 8 R.E.W.H. JACOBS, 1
Page 245 and 246: ETUDE EXPERIMENTALE D'UNE POLLUTION
Page 247 and 248: I. Pump2 Pumpl HL_Q I § i I ,1 1 I
Page 249 and 250: 3000 1500 1000 - FIGURE 2. Evolutio
Page 251: L'evolution des Copepodes harpactic
Page 255 and 256: La biomasse est sensiblement plus f
Page 257 and 258: BIBLIOGRAPHIE Andrassy, I., 1956, D
Page 259: Pearson & Rosenberg, 1978, Macroben
Page 262 and 263: INTRODUCTION Dans le cadre du suivi
Page 264 and 265: Pigments chlorophylliens RESULTATS
Page 266 and 267: apparente en decembre 1978 et aout
Page 268 and 269: Pheo (vg/q ) Ca (pg/g) 5 5 to 15 \
Page 270 and 271: Les conditions meteorologiques (fac
Page 272 and 273: TABLEAU 2. Evolution temporelle des
Page 274 and 275: On peut aussi expliquer , du moins
Page 276 and 277: A Brouennou, quatre groupes ecologi
Page 278 and 279: un groupe de sabulicoles epi- et en
Page 280 and 281: schema des mecanismes regulateurs d
Page 282 and 283: Gargas , E., 1970, Measurement of p
Page 285 and 286: LONG-TERM IMPACT OF THE AMOCO CADIZ
Page 287 and 288: The first type is due to the direct
Page 289 and 290: RESULTS Tissues from 134 specimens
Page 291 and 292: Table I. Distribution of patholocie
Page 293 and 294: a. B o r— IT) —
Page 295 and 296: antenai, and longitudinal spiral ro
Page 297 and 298: epresented an inflammatory response
Page 299 and 300: lateral nuclei were present. The ci
Page 301 and 302: There was also some indication, bas
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This method, based on the glucose o
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Table 4 . Concentrations of total a
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Table 6 . Concentration of aliphati
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sediments which is dominated by hig
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Table 9 . Concentration of aromatic
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COn,pOUnd Table 11 . Concentration
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Table 12. Concentrations of total a
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. Table 14. Concentration of alipha
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Date/Sample April 1979 (13) Whole F
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Table 17 . Concentration of total l
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laboratory (Wardle, 1972). In the l
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Table 23. Concentration of ascorbic
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Table 25 • Concentration of free
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ange. Dominant tissue-free amino ac
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Table 28 Concentration of free amin
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Table 30. Concentration of free ami
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Table 32 . Concentration of free am
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oil-polluted Abers and from nearby
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REFERENCES CITED Anderson, J.W. , 1
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McCain, B.B., H.O. Hodgins, W.D. Gr
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RETABLISSEMENT NATUREL D'UNE VEGETA
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INTRODUCTION Le retablissement d'un
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Nous distinguerons alors les phases
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Situation 3) Territoires fortement
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Plus precisiment le codage correspo
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Figure 3. Marais 6-Etat en 1979 (le
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Figure 5. Marais 6-Etat en 1981 (le
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Commentaires Mis a. part un petit n
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- Marais 3. Ce transect, situe en m
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TRANSECT 'VVATS 5 Figure 8. Transec
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05 (11 O ; cd 00 i I i I i I I I I
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'igure 9 Transect permanent-Marais
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Commentaires - Estuaire de Kerlavos
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1 - appel a la notion de compositio
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Figure 12. T'orphologie comparee d'
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- les plantes survivantes -initiale
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General RESTORATION OF MARSH VEGETA
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FIGURE 1. Marsh west of the bridge
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1979 Plantings Based on our prelimi
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FIGURE 6. Digging Puccinellia along
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FIGURE 10. A 6.5-cm diameter soil a
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In September, we made 9 additional
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FIGURE 16. Creek bank without veget
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FIGURE 19. Eroding creek bank at He
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'^^Wr ./".#" -•: rst^ s8H.*r FIGU
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FIGURE 26. Experimental planting es
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Elevation All elevations are given
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FIGURE 27. Map of study area on nor
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Keri&vos FIGURE 30. Map of study ar
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^~~ -
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TABLE 4. Survival of two types of t
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area (12 m 2 ) , and was an excepti
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TABLE 8. Aboveground dry weight of
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,^-^ FIGURE 37. Several 2-year old
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FIGURE 38. Experimental planting at
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fr J1MI FIGURE 40. Experimental pla
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Puccinellia were planted at one of
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FIGURE 44. Preliminary planting of
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Transplant Time Requirement It is d
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is about 540 cm^ or over 20 times t
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FIGURE 53. Plant shown in Figure 51
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FIGURE 56. Experimental planting of
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ACKNOWLEDGEMENTS Cooperation with o
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LITERATURE CITED Baker, J. M. , 197
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ETUDES MICROBIOLOGIQUES ET MICROPHY
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HMMME NTHWL SWIRLING SITES Referenc
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dans les chenaux (carottes de 30 a
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degres d'une part, et entre les sta
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Schorres peu polities, CI et Bl CI
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L'activite enzymatique dans cette s
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chenaux : Conclusions sur le biotop
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Les schorres Les schorres, par cont
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stations TABLEAU 2 IIYDROfARUUKES D
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Ci 1 12-14 )uiH 79 2-7 oct 79 23-25
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E •" * — lissMs .-*. K V- v..
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FIGURE 8 Evolution temporelle des c
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150- 100 50- 150- 100- 50 446 *o
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REFERENCES BIBLIOGRAPHIQUES Atlas,
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1964-1982, COMPARAISON QUANTITATIVE
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453
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EFFETS DE LA MAREE NOIRE SUR LES PE
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ESPECES En 1980, on a pu cartograph
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3- EVOLUTION GLOBALE II semble s'am
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COUREE DE L EVOLUTION DES BIOMASSES
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464
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CO 00 466
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468
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470
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472
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I s
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476
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Q) 1
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