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On peut estimer que les especes qui avaient bien survecues initialement accusent une mortalite addi ti onnel 1 e raisonnable proche de : (0,o9 + 0,65 + 0,32 + 0,72 + 0,33) /5 soit 0,4 La mortalite totale ultime etant 1,4 fois plus elevee que celle calculee pour la fin du printemps 1978 . 2- PlfERSITE VES C0MP0RTEMENTS SPECIFIQUES Le comportement relatif des diverses especes est tres variable et assez imprevisi ble . En ce qui concerne les effets immediats pour une meme station certaines especes resistent parfai tement (T zllina te.nu.iA , Ouiznia fau.Aifaon.miA) d'autres sont presque i ntegral ement detruites {Vonax vittatuA , Can.dium zdulz, Ba.tkypon.zia, Eckinocan.diu.rn co fidatam , ?ha.nu.& Izgum&n, Eni>li> znAi.6, Eni>ii> Alliqua, Mact>ia coAall-ina, Lu.tia.tA.CL lu.tna.tiia.. Seules les trois premieres especes de cette liste sont timidement reparues aujourd'hui. A plus long terme, les comportemen ts sont aussi disparates : Te.llA.na te.nu.i6 non affecte a prospere jusqu'en 1980 et amorce une diminution de meme pour Ue.phtyi> homben.Qll. Tzllina &abula, 0we.nla fau.Aihon.mi6, kn.znic.ola. mafiina peu affectes initialement ont consi derabl ement regresses en 1979, quelquefois tres tardivement bien que certains signes d'un retabl i ssement certain apparaissent {An.znic.ola maxina) en 1981. Un.oth.oz zt Bath.ypon.zia qui avaient initialement disparus sont reapparus mais seulement dans la partie la plus occidentale et sans encore atteindre les densites initiales. Depuis 1980 on assiste a la reapparition de certaines especes qui avaient completement disparu apres la maree noire, Vonax vittatui se consolide alors que Nzninz cin.n.atu.lu.6 , EnAiA znbiA zt Can.dium zdalz ont du mal a se reimplanter. Des especes nouvelles pour la localite apparues en 1980 dont certaines seraient si gni f i cati ves d'une pollution residuelle, commencent a diminuer en 1981. On doit done considerer que les peuplements presentent encore en fin 1981 surtout dans la partie Est de la plage un desequilibre ecologique profond alors qu'a l'Ouest des signes d'une recouvrance avancee apparaissent. . co H JO
3- EVOLUTION GLOBALE II semble s'amorcer une derive qualitative generale des peuplements de sables fins bien calibres tres typiques a Vonax v-ittatu-i, , Ttlllna fcabula, Ec.klyioca.fidlu.rn co nda.tu.m et grands Solznldaz vers des peuplements plus banalises de sables fins plus eutrophises qu'envases a Kfie.yilc.ola matiina. La maree noire n'est sans doute pas seule en cause ("irarees vertes") mais elle a accelere cette evolution regressive des peuplements originels. Les parties hautes et surtout basses de 1 ' estran, pi us que les niveaux medians, sont les plus touchees. Ceci coTncide avec une plus forte accumulation des echouages des nappes dans le haut de la plage et dans la moitie Est, suivie d'une persistance des hydrocarbures dans l'epaisseur du sediment. Ceci est conforme a ce qui d ' a ete observe sur tout le littoral en matiere d hydrocarbures sous l'influence des vents d'Ouest dominants. ' accumul ation La forte regression constatee dans le basde l&pl age , confirmee par la nature essentiel 1 ement infratidale de la grande masse des cadavres retrouves dans les echouages, souligne un autre fait majeur en dehors des hauts de plage directement atteints par les nappes, 1'essentiel de la mortalite est a imputer au petrole disperse ou dissout au sein de la masse d'eau. Au niveau biomasse totale, on constate une chute importante en 1978 et 1979 par rapport a 1964-1968. Des af f ai bl i ssements des noyaux de peuplements de la partie Est par rapport a ceux de la partie Ouest, et du bas par rapport au haut, sont tres notables. Cette distribution se maintient en 1980 puis 1981 en s ' appauvri ssant encore. Notons que la progression des Atiznico la, se fait au depend d'especes de petite tail 1 e plus productives. II en resulte done une baisse generale de la fertilite de l'ensemble de la baie par rapport a 1968 de 1'ordre de pres des deux tiers. Le retabl i ssement encore tres incomplet des peuplements demanderaib des etudes ulterieures. 459
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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.
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Centre Nationale pour ' 1 Exploitat
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S^rensen, J., D. Christensen, and B
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REPONSES DES PEUPLEMENTS SUBTIDAUX
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Les nouvelles populations caracteri
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TABLEAU I. L' evolution des peuplem
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B Dui © ® Du 2 © Sf FIGURE 4. Ev
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populations initiales durant la pre
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vs w DU w VS/ FV W DU,B SHV W ' \ /
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Connell, J.H. et R.O. Slatyer, 1977
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Les unites cenotigues correspondant
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les peuplements de la baie de Morla
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R, E c a ~ a H CO 3 -> E ;j cu R. a
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-
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leurs du meme ordre qu'avant la pol
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N/m 10 10 10 10 • -* Cycle normal
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3.2.3.2) Peuplement des sables tres
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Richesse specifique (fig. 10) D'avr
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N.m-2 300^ 250 200- 150 100 50 -•
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propor tionnels aux quantities d'hy
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Den HARTOG, C. 8 R.E.W.H. JACOBS, 1
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ETUDE EXPERIMENTALE D'UNE POLLUTION
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I. Pump2 Pumpl HL_Q I § i I ,1 1 I
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3000 1500 1000 - FIGURE 2. Evolutio
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L'evolution des Copepodes harpactic
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La sensibilite de cet indice semble
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La biomasse est sensiblement plus f
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BIBLIOGRAPHIE Andrassy, I., 1956, D
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Pearson & Rosenberg, 1978, Macroben
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INTRODUCTION Dans le cadre du suivi
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Pigments chlorophylliens RESULTATS
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apparente en decembre 1978 et aout
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Pheo (vg/q ) Ca (pg/g) 5 5 to 15 \
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Les conditions meteorologiques (fac
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TABLEAU 2. Evolution temporelle des
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On peut aussi expliquer , du moins
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A Brouennou, quatre groupes ecologi
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un groupe de sabulicoles epi- et en
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schema des mecanismes regulateurs d
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Gargas , E., 1970, Measurement of p
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LONG-TERM IMPACT OF THE AMOCO CADIZ
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The first type is due to the direct
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RESULTS Tissues from 134 specimens
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Table I. Distribution of patholocie
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a. B o r— IT) —
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antenai, and longitudinal spiral ro
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epresented an inflammatory response
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lateral nuclei were present. The ci
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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
Page 424 and 425: Transplant Time Requirement It is d
Page 426 and 427: is about 540 cm^ or over 20 times t
Page 428 and 429: FIGURE 53. Plant shown in Figure 51
Page 430 and 431: FIGURE 56. Experimental planting of
Page 432 and 433: ACKNOWLEDGEMENTS Cooperation with o
Page 434 and 435: LITERATURE CITED Baker, J. M. , 197
Page 437 and 438: ETUDES MICROBIOLOGIQUES ET MICROPHY
Page 439 and 440: HMMME NTHWL SWIRLING SITES Referenc
Page 441 and 442: dans les chenaux (carottes de 30 a
Page 443 and 444: degres d'une part, et entre les sta
Page 445 and 446: Schorres peu polities, CI et Bl CI
Page 447 and 448: L'activite enzymatique dans cette s
Page 449 and 450: chenaux : Conclusions sur le biotop
Page 451 and 452: Les schorres Les schorres, par cont
Page 453 and 454: stations TABLEAU 2 IIYDROfARUUKES D
Page 455 and 456: Ci 1 12-14 )uiH 79 2-7 oct 79 23-25
Page 457: E •" * — lissMs .-*. K V- v..
Page 460 and 461: FIGURE 8 Evolution temporelle des c
Page 462 and 463: 150- 100 50- 150- 100- 50 446 *o
Page 464 and 465: REFERENCES BIBLIOGRAPHIQUES Atlas,
Page 467 and 468: 1964-1982, COMPARAISON QUANTITATIVE
Page 469 and 470: 453
Page 471 and 472: EFFETS DE LA MAREE NOIRE SUR LES PE
Page 473: ESPECES En 1980, on a pu cartograph
Page 478 and 479: COUREE DE L EVOLUTION DES BIOMASSES
Page 480 and 481: 464
Page 482 and 483: CO 00 466
Page 484 and 485: 468
Page 486 and 487: 470
Page 488 and 489: 472
Page 490 and 491: I s
Page 492 and 493: 476
Page 495: Q) 1
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