Biogeochemical processes involving dissolved CO2 and CH4 at Albano, Averno, and Monticchio meromictic volcanic lakes (Central-Southern Italy)

Bulletin of Volcanology

Volumn 75, Issue 1, 2013, Pages 1-19

  Cabassi, Jacopo ^a   Tassi, Franco ^a,b   Vaselli, Orlando ^a,b   Fiebig, Jens ^c   Nocentini, Matteo ^a,b   Capecchiacci, Francesco ^b   Rouwet, Dmitri ^d   Bicocchi, Gabriele ^a  

^a UNIVERSITY OF FLORENCE   (Italy)

^b SEZIONE DI FIRENZE   (Italy)

^c GOETHE UNIVERSITY   (Germany)

^d ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA   (Italy)

Author keywords

Dissolved gases; Italy; Lake stratification; Volcanic lakes

Indexed keywords

BIOGEOCHEMISTRY; CARBON DIOXIDE; CRATER LAKE; DISSOLVED GAS; ISOTOPIC COMPOSITION; MEROMICTIC LAKE; METHANE;

BASILICATA; CAMPANIA [ITALY]; ITALY; LAGO GRANDE DI MONTICCHIO; LAKE ALBANO; LAKE AVERNO; LAZIO; NAPOLI [CAMPANIA]; POTENZA; ROMA [LAZIO];

EID: 84871884847     PISSN: 02588900     EISSN: 14320819     Source Type: Journal    
DOI: 10.1007/s00445-012-0683-0     Document Type: Article

References (123)

1. Ahlgren I, Sörensson F, Waara T, Vrede K (1994) Nitrogen budgets in relation to microbial transformations in lakes. Ambio 23(6): 367-377.
2. Anzidei M, Esposito A, De Giosa F (2006) The dark side of the Albano crater lake. Ann Geophys 49: 1275-1287.
3. 2 budget (Colli Albani volcano, Italy): constrains to hazard evaluation. J Volcanol Geotherm Res 171: 258-268.
4. Aragno M, Schlegel HG (1981) The hydrogen-oxidizing bacteria. In: Starr MP, Stolp H, Trüper HG, Ballows A, Schlegel HG (eds) The prokaryotes. a handbook of habitats, isolation and identification of bacteria, vol 1. Springer, Berlin.
5. DIC in lakes: geochemistry, lake metabolism and morphometry. Limnol Oceanogr 49: 1160-1172.
6. Badrudin M (1994) Kelut volcano monitoring: hazards, mitigation and changes in water chemistry prior to the 1990 eruption. Geochem J 28: 233-241.
7. Balistrieri LS, Murray JW, Paul B (1992) The cycling of iron and manganese in the water column of Lake Sammamish, Washington. Limnol Oceanogr 37: 510-528.
8. Barker JF, Fritz P (1981) Carbon isotope fractionation during microbial methane oxidation. Nature 293: 289-291.
9. Beccaluva L, Coltorti M, Di Girolamo P, Melluso L, Milani L, Morra V, Siena F (2002) Petrogenesis and evolution of Mt Vulture alkaline volcanism (Southern Italy). Miner Petrol 74: 277-297.
10. Berner EK, Berner RA (1987) Global water cycle: geochemistry and environment Prentice-Hall, Englewood Cliffs, 397 pp.
11. Bianchi L, Mannelli F, Viti C, Adessi A, De Philippis R (2010) Hydrogen-producing purple non-sulfur bacteria isolated from the trophic lake Averno. Int J Hydr En 35: 12213-12223.
12. Blong RJ (1984) Volcanic hazard: a sourcebook of the effects of eruptions. Academic, Orlando, p 424.
13. Bowien B, Schlegel HG (1981) Physiology and biochemistry of aerobic hydrogen-oxidizing bacteria. Ann Rev Microbiol 35: 405-452.
14. Brantley SL, Agustsdottir AM, Rowe GL (1993) Crater lakes reveal volcanic heat and volatile fluxes. Geol Soc Am 3: 175-178.
15. Brown G, Rymer H, Dowden J, Kapadia P, Stevenson D, Barquero J, Morales LD (1989) Energy budget analysis for Poás crater lake: implications for predicting volcanic activity. Nature 339: 370-373.
16. Brune A, Frenzel P, Cypionka H (2000) Life at the oxic-anoxic interface: microbial activities and adaptation. FEMS Microbiol Rev 24(5): 691-710.
17. Buresh RJ, Patrick WH (1981) Nitrate reduction to ammonium and organic nitrogen in an estuarine sediment. Soil Biol Biochem 13: 279-283.
18. Calcagnile G, Panza GF (1981) The main characteristics of the lithosphere-asthenosphere system in Italy and surrounding regions. Pure Appl Geophys 19: 865-879.
19. Caliro S, Chiodini G, Moretti R, Avino R, Granieri D, Russo M, Fiebig J (2007) The origin of the fumaroles of La Solfatara (Campi Flegrei, South Italy). Geochim Cosmochim Acta 71: 3040-3055.
20. Caliro S, Chiodini G, Izzo G, Minopoli C, Signorini A, Avino R, Granieri D (2008) Geochemical and biochemical evidence of lake overturn and fish kill at Lake Averno, Italy. J Volcanol Geotherm Res 178: 305-316.
21. Caracausi A, Nuccio PM, Favara R, Nicolosi M, Paternoster M (2009) Gas hazard assessment at the Monticchio crater lakes of Mt Vulture, a volcano in Southern Italy. Terra Nova 21: 83-87.
22. Carapezza ML, Tarchini L (2007) Accidental gas emission from shallow pressurized aquifers at Alban Hills volcano (Rome, Italy): geochemical evidence of magmatic degassing? J Volcanol Geotherm Res 165: 5-16.
23. Carapezza ML, Lelli M, Tarchini L (2008) Geochemistry of the Albano and Nemi crater lakes in the volcanic district of Alban Hills (Rome, Italy). J Volcanol Geotherm Res 178: 297-304.
24. Carapezza ML, Lelli M, Tarchini L (2010) Geochemistry of the Albano crater lake. In: Funiciello R, Giordano G (eds) The Colli Albani volcano. Special Publications of IAVCEI, 3. Geological Society of London, London, pp 107-139.
25. Carapezza ML, Barberi F, Ranaldi M, Ricci T, Tarchini L, Barrancos J, Fischer C, Granieri D, Lucchetti C, Melian G, Perez N, Tuccimei P, Vogel A, Weber K (2012) Hazardous gas emissions from the flanks of the quiescent Colli Albani volcano (Rome, Italy). Appl Geochem 27(9): 1767-1782.
26. Carpenter SR (1983) Lake geometry: implications for production and sediment accretion rates. J Theor Biol 105: 273-286.
27. Casper P (1992) Methane production in lakes of different trophic state. Arch Hydrobiol Beih Ergebn Limnol 37: 149-154.
28. Chiodini G (1996) Gases dissolved in groundwaters: analytical methods and examples of applications in central Italy. In: Marini L, Ottonello G (eds) Proc. Symp. Environmental Geochemistry, Castelnuovo di Porto, Rome, 22-26 May, pp 135-148.
29. Chiodini G, Cioni R, Guidi M, Marini L, Principe C, Raco B (1997) Water and gas chemistry of the Lake Piccolo of Monticchio (Mt Vulture, Italy). Current Research on Volcanic Lakes 10: 3-8.
30. Chiodini G, Cioni R, Guidi M, Magro G, Marini L, Raco B (2000) Gas chemistry of the Lake Piccolo of Monticchio, Mt Vulture, in December 1996. Acta Vulcanol 12: 139-142.
31. 2 variations in Lake Albano associated with seismic activity. Bull Volcanol 74: 861-871.
32. Chondrogianni C, Ariztegui D, Guilizzoni P, Lami A (1996) Lakes Albano and Nemi (central Italy): an overview. In: Guilizzoni G, Oldfield F (eds) Paleoenvironmental analysis of Italian Crater Lake and Adriatic sediments. Mem Ist Ital Idrobiol 55: 17-22.
33. Cioni R, Guidi M, Raco B, Marini L, Gambardella B (2003) Water chemistry of Lake Albano (Italy). J Volcanol Geotherm Res 120: 179-195.
34. Cioni R, Marini L, Raco B (2006) The Lake Piccolo di Monticchio: fluid geochemistry and evaluation of the limnic eruption hazard. In: Principe C (ed) The geology of Mount Vulture. CNR, Regione Basilicata, pp 171-177.
35. Coleman ML, Shepherd TJ, Rouse JE, Moore GR (1982) Reduction of water with zinc for hydrogen isotope analysis. Anal Chem 54: 993-995.
36. Conrad R, Aragno M, Seiler W (1983) Production and consumption of hydrogen in a eutrophic lake. Appl Environ Microbiol 45: 502-510.
37. Conticelli S, Peccerillo A (1992) Petrology and geochemistry of potassic and ultrapotassic volcanism in central Italy-petrogenesis and inferences on the evolution of the mantle source. Lithos 28(3-6): 221-240.
38. Conticelli S, Carlson RW, Widom E, Serri G (2007) Chemical and isotopic composition (Os, Pb, Nd, and Sr) of Neogene to Quaternary calc-alkalic, shoshonitic, and ultrapotassic mafic rocks from the Italian peninsula: inferences on the nature of their mantle sources. In: Beccaluva L, Bianchini G, Wilson M (eds) Cenozoic volcanism in the Mediterranean area. Geol Soc Am Special Paper 418: 171-202.
39. Craig H, Lupton JE (1976) Primordial neon, helium and hydrogen in oceanic basalts. Earth Planet Sci Lett 31: 369-385.
40. Davison W, Heaney SI, Talling JF, Rigg E (1980) Seasonal transformations and movements of iron in a productive English lake with deep water anoxia. Schweiz Z Hydrol 42: 196-224.
41. De Benedetti AA, Funiciello R, Giordano G, Diano G, Caprilli E, Paterne M (2008) Volcanology, history and myths of the Lake Albano maar (Colli Albani volcano, Italy). J Volcanol Geotherm Res 176: 387-406.
42. Doglioni C, Harabaglia P, Merlini S, Mongelli F, Peccerillo A, Piromallo C (1999) Orogens and slabs vs. their direction of subduction. Earth Sci Rev 45: 167-208.
43. 16O ratio in natural waters. Geochim Cosmochim Acta 4: 213-224.
44. Evans WC, Kling GW, Tuttle ML, Tanyileke G, White LD (1993) Gas buildup in Lake Nyos, Cameroon: the recharge process and its consequences. Appl Geochem 8: 207-221.
45. Evans WC, White LD, Tuttle ML, Kling GW, Tanyileke G, Michel RL (1994) Six years of changes at Lake Nyos, Cameroon yield clues to the past and cautions for the future. Geochem J 28: 139-162.
46. Evans WC, White LD, Rapp JB (1998) Geochemistry of some gases in hydrothermal fluids from the southern Juan de Fuca ridge. J Geophys Res 15: 305-313.
47. Faccenna C, Piromallo C, Crespo-Blanc A, Jolivet L, Rossetti F (2004) Lateral slab deformation and the origin of the western Mediterranean arcs. Tectonics 23, TC1012, 21 pp. doi: 10. 1029/2002TC001488.
48. Frenzel P, Thebrath B, Conrad R (1990) Oxidation of methane in the oxic surface layer of a deep lake sediment (Lake Constance). FEMS Microbiol Ecol 73: 149-158.
49. Funiciello R, Giordano G, De Rita D, Carapezza ML, Barberi F (2002) L'attività recente del cratere del Lago Albano di Castelgandolfo. Rend Fis Acc Lincei 9-13: 113-143.
50. Funiciello R, Giordano G, De Rita D (2003) The Albano maar lake (Colli Albani Volcano, Italy): recent volcanic activity and evidence of pre-Roman Age catastrophic lahar events. J Volcanol Geotherm Res 123: 43-61.
51. Gächter R, Bloesch J (1985) Seasonal and vertical variation in the C: P ratio of suspended and settling seston of lakes. Hydrobiologia 128(3): 193-200. doi: 10. 1007/BF00006814.
52. Gächter R, Mares A (1985) Does settling seston release soluble reactive phosphorus in the hypolimnion of lakes? Limnol Oceanogr 30(2): 364-371.
53. Gambardella B, Giosa P, Marini L (2006) Il ruolo della interazione acqua-roccia nella genesi delle acque minerali del Monte Vulture. In: Principe C (ed) The geology of Mount Vulture. CNR, Regione Basilicata, pp 113-148.
54. Giordano G, De Benedetti AA, Diana A, Diano G, Gaudioso F, Marasco F, Miceli M, Mollo S, Cas RAF, Funiciello R (2006) The Colli Albani mafic caldera (Roma, Italy): stratigraphy, structure and petrology. J Volcanol Geotherm Res 155: 49-80.
55. Hoefs J (2009) Stable isotope geochemistry, 6th edn. Springer, Berlin, p 288.
56. Hongve D (1997) Cycling of iron, manganese, and phosphate in a meromictic lake. Limnol Oceanogr 42: 635-647.
57. Hunt JM (1984) Generation and migration of light hydrocarbons. Science 226: 1265-1270.
58. Hurst T, Christenson B, Cole-Baker J (2012) Use of a weather buoy to derive improved heat and mass balance parameters for Ruapehu Crater Lake. J Volcanol Geotherm Res 235: 23-28.
59. Improta C, Andini S, Ferrara L (2004) Chemical and ecotoxicological characterization of Averno Lake. Bull Environ Contam Toxicol 72: 472-481.
60. Jetten MS, Strous M, van de Pas-Schoonen KT, Schalk J, van Dongen UG, van de Graaf AA, Logemann S, Muyzer G, van Loosdrecht MC, Kuenen JG (1998) The anaerobic oxidation of ammonium. FEMS Microbiol Rev 22(5): 421-437.
61. Kusakabe M (1996) Hazardous crater lakes. In: Scarpa R, Tilling RI (eds) Monitoring and mitigation of volcano hazards. Springer, Berlin, pp 573-598.
62. 2 in lakes Monoun and Nyos, Cameroon, before and during controlled degassing. Geochem J 42: 93-118.
63. Loeb SL, Reuter JE (1981) The epilithic periphyton community: a five-lake comparative study of community productivity, nitrogen metabolism and depth-distribution of standing crop. Verh Internat Verein Limnol 21: 346-352.
64. Longinelli A, Selmo E (2003) Isotopic composition of precipitation in Italy: a first overall map. J Hydrol 270: 75-88.
65. Lopes F, Viollier E, Thiam A, Michard G, Abril G, Groleau A, Prévot F, Carrias JF, Albéric P, Jézéquel D (2011) Biogeochemical modeling of anaerobic vs. aerobic methane oxidation in a meromictic crater lake (Lake Pavin, France). Appl Geochem 26: 1919-1932.
66. Mah RA, Ward DM, Baresi L, Glass TL (1977) Biogenesis of methane. Annu Rev Microbiol 31: 309-341.
67. Mamyrin BA, Tolstikhin IN (1984) Helium isotopes in nature. Elsevier, Amsterdam.
68. Mango FD (1997) The light hydrocarbons in petroleum: a critical review. Org Geochem 26: 417-440.
69. Mango FD (2000) The origin of light hydrocarbons. Geochim Cosmochim Acta 64: 1265-1277.
70. Martini M, Giannini L, Prati F, Tassi F, Capaccioni B, Iozzelli P (1994) Chemical characters of crater lakes in the Azores and Italy: the anomaly of the Lake Albano. Geochem J 28: 173-184.
71. 2 reservoir? Current Research on Volcanic Lakes 8: 11-17.
72. 16O fractionation factors in evaporation of water at 60 and 80 °C. Geochem J 12: 121-126.
73. Mattei M, Conticelli S, Giordano G (2010) The Tyrrhenian margin geological setting: from the Apennine orogeny to the K-rich volcanism. In: Funiciello R, Giordano G (ed) The Colli Albani volcano. Special Publications of IAVCEI, 3. Geological Society of London, London, pp 7-27.
74. 2 in central Italy. Earth Sci Rev 66: 89-141.
75. Moeller RE, Roskoski JP (1978) Nitrogen-fixation in the littoral benthos of an oligotrophic lake. Hydrobiologia 60(1): 13-16.
76. Molongoski JJ, Klug MJ (1980) Anaerobic metabolism of particulate organic matter in the sediments of a hypereutrophic lake. Freshwater Biol 10: 507-518.
77. Mook WG, Bommerson JC, Staverman WH (1974) Carbon isotope fractionation between dissolved bicarbonate and gaseous carbon dioxide. Earth Planet Sci Lett 22: 169-176.
78. Mulder A, van de Graaf AA, Robertson LA, Kuenen JG (1995) Anaerobic ammonium oxidation discovered in a denitrifying fluidized bed reactor. FEMS Microbiol Ecol 16(3): 177-184. doi: 10. 1111/j. 1574-6941. 1995. tb00281. x.
79. Nairn IA, Wood CP, Hewson CAY, Otway PM (1979) Phreatic eruptions of Ruapheu: April 1975. N Z J Geol Geophys 22: 155-173.
80. O'Leary MH (1988) Carbon isotopes in photosynthesis. BioScience 38: 328-336.
81. Orsi G, Di Vito MA, Isaia R (2004) Volcanic hazard assessment at the restless Campi Flegrei caldera. Bull Volcanol 66: 514-530.
82. Panza GF, Peccerillo A, Aoudia A, Farina B (2007) Geophysical and petrological modelling of the structure and composition of the crust and upper mantle in complex geodynamic setting: the Tyrrhenian Sea and surroundings. Earth Sci Rev 80: 1-46.
83. Pasternack GB, Varekamp JC (1997) Volcanic lake systematics I. Physical constraints. Bull Volcanol 58(7): 528-538. doi: 10. 1007/s004450050160.
84. Paternoster M, Liotta M, Favara R (2008) Stable isotope ratios in meteoric recharge and groundwater at Mt Vulture volcano, southern Italy. J Hydrol 348: 87-97.
85. Peccerillo A (2005) Plio-Quaternary volcanism in Italy. Petrology, geochemistry, geodynamics. Springer, Berlin, p 365.
86. Rice A (2000) Rollover in volcanic crater lakes: a possible cause for Lake Nyos type disasters. J Volcanol Geotherm Res 97: 233-239.
87. Rich PH (1975) Benthic metabolism of a soft-water lake. Verh Internat Verein Limnol 19: 1023-1028.
88. Rich PH (1980) Hypolimnetic metabolism in three Cape Cod lakes. Amer Midland Natur 104: 102-109.
89. Rollison H (1993) Using geochemical data: evaluation, presentation, interpretation. Longman Scientific and Technical, New York, p 352.
90. Rowe GL Jr (1994) Oxygen, hydrogen and sulfur isotope systematics of the crater lake system of Poas volcano, Costa Rica. Geochem J 28: 263-287.
91. Rudd JWM, Taylor CD (1980) Methane cycling in aquatic environments. Adv Aquat Microbiol 2: 77-150.
92. Rudd JWM, Hamilton RD, Campbell NER (1974) Measurement of microbial oxidation of methane in lake water. Limnol Oceanogr 19: 519-524.
93. Salata GG, Roelke LA, Cifuentes LA (2000) A rapid and precise method for measuring stable carbon isotope ratios of dissolved inorganic carbon. Mar Chem 69: 153-161.
94. Scarascia S, Lozej A, Cassinis R (1994) Crustal structures of the Ligurian, Tyrrhenian and Ionian seas and adjacent onshore areas interpreted from wide-angle seismic profiles. Boll Geofis Teor Appl 36: 5-19.
95. Schettler G, Alberic P (2008) Laghi di Monticchio (Southern Italy, Region Basilicata): genesis of sediments-a geochemical study. J Paleolimnol 40: 529-556.
96. Schmid M, Halbwachs M, Wehrli B, Wüest A (2005) Weak mixing in Lake Kivu: new insights indicate increasing risk of uncontrolled gas eruption. Geochem Geophys Geosyst 6: 1-11.
97. Schoell M (1980) The hydrogen and carbon isotopic composition of methane from natural gases of various origins. Geochim Cosmochim Acta 44: 649-661.
98. Schoell M (1988) Multiple origins of methane in the Earth. Chem Geol 71: 1-10.
99. Scrocca D, Carminati E, Doglioni C (2005) Deep structure of the southern Apennines, Italy: thin-skinned or thick-skinned? Tectonics 24, TC3005, 20 pp. doi: 10. 1029/2004TC001634.
100. Sigurdsson H, Devince JD, Tchoua FM, Presser TS, Pringle MKW, Evans WC (1987) Origin of the lethal gas burst from Lake Monoun, Cameroon. J Volcanol Geotherm Res 31: 1-16.
101. Stewart WDP, Preston T, Peterson HG, Christofi N (1982) Nitrogen cycling in eutrophic freshwaters. Philosoph Transact Royal Soc B296: 491-509.
102. Stoppa F, Creati N, Rosatelli G, Rozzi B (1999) From mantle to vent, anatomy of a volcano, Mt Vulture (Southern Italy). Plinius 22: 352-353.
103. Tassi F, Montegrossi G, Vaselli O (2004a) Metodologie di campionamento ed analisi di fasi gassose. Internal Report CNR-IGG, Florence, no. 1/2003, pp 16.
104. Tassi F, Vaselli O, Giannini L, Tedesco D, Nencetti A, Montegrossi G, Yalire MM (2004b) A low-cost and effective method to collect water and gas samples from stratified crater lakes: the 485 m deep lake Kivu (DRC). In: Proceedings of the IAVCEI General Assembly, Puchon, Chile, 14-19 November.
105. Tassi F, Vaselli O, Luchetti G, Montegrossi G, Minissale A (2008) Metodo per la determinazione dei gas disciolti in acque naturali. Int Rep CNR-IGG, Florence, n° 10450: 11.
106. Tassi F, Vaselli O, Tedesco D, Montegrossi G, Darrah T, Cuoco E, Mapendano MY, Poreda R, Delgado Huertas A (2009a) Water and gas chemistry at Lake Kivu (DRC): geochemical evidence of vertical and horizontal heterogeneities in a multi-basin structure. Geochem Geophys Geosyst 10. doi: 10. 1029/2008GC002191.
107. Tassi F, Vaselli O, Fernandez E, Duarte E, Martinez M, Delgado Huertas A, Bergamaschi F (2009b) Morphological and geochemical features of crater lakes in Costa Rica: an overview. J Limnol 68: 193-205.
108. Tassi F, Fiebig J, Vaselli O, Nocentini M (2012) Origins of methane discharging from volcanic-hydrothermal, geothermal and cold emissions in Italy. Chem Geol 310-311: 36-48.
109. 2) and isotopic (He, Ne, Ar, C) variations at the Solfatara crater (southern Italy): mixing of different sources in relation to seismic activity. Earth Planet Sci Lett 171: 465-480.
110. Thauer RK, Badziong W (1980) Respiration with sulfate as electron acceptor. In: Knowles CJ (ed) Diversity of bacterial respiratory systems. CRC, Boca Raton, pp 65-85.
111. Valiela I (1991) Ecology of coastal ecosystems. In: Barnes RSK, Mann KH (eds) Fundamentals of aquatic ecology. Blackwell Science, Oxford, pp 57-76.
112. Varekamp JC, Kreulen R (2000) The stable isotope geochemistry of volcanic lakes, with examples from Indonesia. J Volcanol Geotherm Res 97: 309-327.
113. Varekamp JC, Pasternack GB, Rowe GL Jr (2000) Volcanic lake systematics II. Chemical constraints. J Volcanol Geotherm Res 97: 161-179.
114. Vaselli O, Tassi F, Montegrossi G, Capaccioni B, Giannini L (2006) Sampling and analysis of fumarolic gases. Acta Vulcanol 1-2: 65-76.
115. Vaselli O, Tassi F, Tedesco D, Poreda JR, Caprai A (2011) Submarine and inland gas discharges from the Campi Flegrei (southern Italy) and the Pozzuoli Bay: geochemical clues for a common hydrothermal-magmatic source. Procedia Earth Planet Sci 4: 57-73.
116. Veronesi ML, Barbieri A, Hanselmann KW (2002) Phosphorus, carbon and nitrogen enrichment during sedimentation in a seasonally anoxic lake (Lake Lugano, Switzerland). J Limnol 61(2): 215-223.
117. Weiss R (1970) The solubility of nitrogen, oxygen and argon in water and seawater. Deep-Sea Res 17: 721-735.
118. Whitfield M (1978) Activity coefficients in natural waters. In: Pytkowicz RM (ed) Activity coefficients in electrolyte solutions. CRC, Boca Raton, pp 153-300.
119. Whiticar MJ (1999) Carbon and hydrogen isotope systematics of bacterial formation and oxidation of methane. Chem Geol 161: 291-314.
120. Woese CR, Kandler O, Wheelis ML (1990) Towards a natural system of organisms: proposal for the domains Archaea, Bacteria and Eucarya. Proc Natl Acad Sci 87: 44576-44579.
121. Zehnder AJB (1978) Ecology of methane formation. In: Michell R (ed) Water pollution microbiology. Wiley, New York, pp 349-376.
122. 2. Geochim Cosmochim Acta 59: 107-114.
123. Zolitschka B, Negendank JFW (1996) Sedimentology, dating and palaeoclimatic interpretation of a 763 ka record from Lago Grande di Monticchio, southern Italy. Quat Sci Rev 15: 101-112.