Cryptic photosynthesis-extrasolar planetary oxygen without a surface biological signature

Astrobiology

Volumn 9, Issue 7, 2009, Pages 623-636

  Cockell, Charles S ^a   Kaltenegger, Lisa ^b   Raven, John A ^c  

^a OPEN UNIVERSITY   (United Kingdom)

^b HARVARD SMITHSONIAN CENTER FOR ASTROPHYSICS   (United States)

^c UNIVERSITY OF DUNDEE   (United Kingdom)

Author keywords

Atmospheric gases; Bioastronomy; Extrasolar terrestrial planets; Photosynthesis; Planetary atmospheres

Indexed keywords

OXYGEN; WATER;

ARTICLE; ASTRONOMY; BIODIVERSITY; BIOLOGICAL MODEL; BIOLOGY; CHEMISTRY; MICROCLIMATE; PHOTOSYNTHESIS; PHYSIOLOGY; SPECTROSCOPY; SURFACE PROPERTY;

BIODIVERSITY; EARTH (PLANET); EXOBIOLOGY; EXTRATERRESTRIAL ENVIRONMENT; MODELS, BIOLOGICAL; OXYGEN; PHOTOSYNTHESIS; PLANETS; SOLAR SYSTEM; SPECTRUM ANALYSIS; SURFACE PROPERTIES; WATER;

EID: 70349605822     PISSN: 15311074     EISSN: None     Source Type: Journal    
DOI: 10.1089/ast.2008.0273     Document Type: Article

References (133)

1. Arnold, L., Gillet, S., Lardière, O., Riaud, P., and Schneider, J. (2002) A test for the search for life on extrasolar planets. Looking for the terrestrial vegetation signature in the Earthshine spectrum. Astron. Astrophys. 392:231-237.
2. Arnold, L., Bréon, F-M., and Brewer, S. (2009) The Earth as an extrasolar planet: the vegetation spectral signature today and during the last Quaternary climatic extrema. Int. J. Astrobiology 8:81-94.
3. Arrigo, K.R., Robinson, D.H., and Sullivan, C.W. (1993) A high resolution study of the platelet ice ecosystem in McMurdo Sound, Antarctica: photosynthesis and bio-optical characteristics of a dense microalgal bloom. Mar. Ecol. Prog. Ser. 98:173-185.
4. Arrigo, K.R., Dieckmann, G., Gosselin, M., Robinson, D.H., Fritsen, C.H., and Sullivan, C.W. (1995) High resolution study of the platelet ice ecosystem in McMurdo Sound, Antarctica: biomass, nutrient and production profiles within a dense microalgal bloom. Mar. Ecol. Prog. Ser. 127:255-268.
5. Arrigo, K.R., Worthen, D.L., Lizotte, M.P., Dixon, P., and Dieckmann, G. (1997) Primary production in Antarctic sea ice. Science 276:394-397.
6. Beckmann, A. and Hense, I. (2007) Beneath the surface: characteristics of oceanic ecosystems under weak mixing conditions- a theoretical investigation. Prog. Oceanogr. 75:771-796.
7. Bell, R.A. (1993) Cryptoendolithic algae of hot semiarid lands and deserts. J. Phycol. 29:133-139.
8. Bell, R.A. and Sommerfield, M.R. (1987) Algal biomass and primary production within a temperate zone sandstone. Am. J. Bot. 74:294-297.
9. Belnap, J. and Lange, O. (2001) Biological Soil Crusts: Structure, Function, and Management, Springer, New York.
10. Berner, T. and Evenari, M. (1978) The influence of temperature and light penetration on the abundance of the hypolithic algae in the Negev Desert of Israel. Oecologia 33:255-260.
11. Boison, G., Mergel, A., Jolker, H., and Bothe, H. (2004) Bacterial life and dinitrogen fixation at a gypsum rock. Appl. Environ. Microbiol. 70:7070-7077.
12. Broady, P.A. (1981) The ecology of chasmolithic algae at coastal locations of Antarctica. Phycologia 20:259-272.
13. Brostoff, W.N., Sharifi, M.R., and Rundel, P.W. (2002) Photosynthesis of cryptobiotic crusts in a seasonally inundated system of pans and dunes at Edwards Air Force Base, western Mojave desert, California: laboratory studies. Flora 197:143-151.
14. Büdel, B. and Wessels, D.C.J. (1991) Rock inhabiting blue-green algae=cyanobacteria from hot arid regions. Algological Studies 64:385-398.
15. Büdel, B., Weber, B., Kühl, M., Pfanz, H., Sültemeyer, D., and Wessels, D. (2004) Reshaping of sandstone surfaces by cryptoendolithic cyanobacteria-bioalkalinisation causes chemical weathering in arid landscapes. Geobiology 2:261-268.
16. Bungartz, F. and Wirth, V. (2007) Buellia peregrina sp. nov., a new, euendolithic calcicolous lichen species from the Namib Desert. Lichenologist 39:41-45.
17. Campbell, S.E. (1979) Soil stabilization by a prokaryotic desert crust: implications for Precambrian land biota. Orig. Life Evol. Biosph. 9:335-348.
18. Catling, D.C., Glein, C.R., Zahnle, K.J., and McKay, C.P. (2005) Why O2 is required by complex life on habitable planets and the concept of planetary "oxygenation time." Astrobiology 5:415-438.
19. Chen, Y.N., Wang, Q., Li, W.H., and Ruan, X. (2007) Microbiotic crusts and their interrelations with environmental factors in the Gurbantonggut desert, western China. Environ. Geol. 52:691-700.
20. Christensen, P.R. and Pearl, J.C. (1997), Initial data from the Mars Global Surveyor thermal emission spectrometer experiment: observations of the Earth. J. Geophys. Res. 102:10875.
21. Cockell, C.S. and Herrera, A. (2008) Why are some microorganisms boring? Trends Microbiol. 16:101-106.
22. Cockell, C.S. and Raven, J.A. (2004) Zones of photosynthetic potential on Mars and the early Earth. Icarus 169:300-310.
23. Cockell, C.S. and Stokes, M.D. (2004) Widespread colonisation by polar hypoliths. Nature 431:414.
24. Cockell, C.S. and Stokes, M.D. (2006) Hypolithic colonization of opaque rocks in the Arctic and Antarctic polar desert. Arct. Antarct. Alp. Res. 38:335-342.
25. Cockell, C.S., Lee, P., Osinski, G., Horneck, H., and Broady, P. (2002) Impact-induced microbial endolithic habitats. Meteorit. Planet. Sci. 37:1287-1298.
26. Cockell, C.S., Lee, P., Broady, P., Lim, D.S.S., Osinski, G.R., Parnell, J., Koeberl, C., Pesonen, L., and Salminen, J. (2005) Effects of asteroid and comet impacts on habitats for lithophytic organisms-a synthesis. Meteorit. Planet. Sci. 40:1901-1914.
27. Cox, J.L., Wiebe, P.H., Ortner, P., and Boyd, S. (1982) Seasonal development of subsurface chlorophyll maxima in slope water and northern Sargasso Sea of the northwestern Atlantic Ocean. Biological Oceanography 1:271-286.
28. Danin, A., Dor, I., Sandler, A., and Amit, R. (1998) Desert crust morphology and its relations to microbiotic succession at Mt. Sedom, Israel. J. Arid Environ. 38:161-174.
29. Davilla, A.F., Gómez-Silva, B., de los Rios, A., Ascaso, C., Olivares, H., McKay, C.P., and Wierzchos, J. (2008) Facilitation of endolithic microbial survival in the hyperarid core of the Atacama Desert by mineral deliquescence. J. Geophys. Res. 113, doi:10.1029=2007JG000561.
30. del Giorgio, P.A. and Williams, P.J. le B. (2005) The global significance of respiration in aquatic ecosystems: from the single cell to the biosphere. In Respiration in Aquatic Systems, edited by P. del Giorgio and P. le B. Williams, Oxford University Press, Oxford, pp 36-46.
31. de los Rios, A., Sancho, L.G., Grube, M., Wierzchos, J., and Ascaso, C. (2005) Endolithic growth of two Lecidea lichens in granite from continental Antarctica detected by molecular and microscopy techniques. New Phytol. 165:181-189.
32. Des Marais, D.J., Harwit, M.O., Jucks, K.W., Kasting, J.F., Lin, D.N.C., Lunine, J.I., Schneider, J., Seager, S., Traub, W.A., and Woolf, N.J. (2002), Remote sensing of planetary properties and biosignatures on extrasolar terrestrial planets. Astrobiology 2:153-181.
33. Dickson, L.G. (2000) Constraints to nitrogen fixation by cryptogamic crusts in a polar desert ecosystem, Devon Island, NWT, Canada. Arct. Antarct. Alp. Res. 32:40-45.
34. Douglas, S. (2004) Microbial biosignatures in evaporite deposits: evidence from Death Valley, California. Planet. Space Sci. 52:223-227.
35. Douglas, S. and Yang, H.X. (2002) Mineral biosignatures in evaporites: presence of rosickyite in an endoevaporitic microbial community from Death Valley, California. Geology 30:1075-1078.
36. Eldridge, D.J. and Greene, R.S.B. (1994) Microbiotic soil crusts: a review of their roles in soil and ecological processes in the rangelands of Australia. Australian Journal of Soil Research 32:389-415.
37. Falkowski, P.G. and Raven, J.A. (2007). Aquatic Photosynthesis, 2nd ed., Princeton University Press, Princeton.
38. Fennel, K. and Boss, E. (2003) Subsurface maxima of phytoplankton and chlorophyll: steady-state solutions from a simple model. Limnol. Oceanogr. 48:1521-1534.
39. Field, C.B., Behrenfeld, M.J., Randerson, J.T., and Falkowski, P. (1998) Primary production in the biosphere: integrating terrestrial and oceanic components. Science 281:237-240.
40. Fisk, M.R., Giovannoni, S.J., and Thorseth, I.H. (1998) Alteration of oceanic volcanic glass: textural evidence of microbial activity. Science 281:978-980
41. Friedmann, E.I. (1980) Endolithic microbial life in hot and cold deserts. Orig. Life Evol. Biosph. 10:223-235.
42. Friedmann, E.I. (1982) Endolithic microorganisms in the Antarctic cold desert. Science 215:1045-1053.
43. Friedmann, E.I., Kappen, L., Meyer, M.A., and Nienow, J.A. (1993) Long-term productivity in the cryptoendolithic microbial community of the Ross Desert, Antarctica. Microb. Ecol. 25:51-69.
44. Garcia-Pichel, F. and Belnap, J. (1996) Microenvironments and microscale productivity of cyanobacterial desert crusts. J. Phycol. 32:774-782.
45. Garcia-Pichel, F., López-Cortés, A., and Nübel, U. (2001) Phylogenetic and morphological diversity of cyanobacteria in soil desert crusts from the Colorado plateau. Appl. Environ. Microbiol. 67:1902-1910.
46. Gates, D.M. (1980) Biophysical Ecology, Springer-Verlag, New York.
47. Golubic, S., Friedmann, E.I., and Schneider, J. (1981) The lithobiontic ecological niche, with special reference to microorganisms. Journal of Sedimentary Research 51:475-478.
48. Hanson, C.E, Pesant, S., Waite, A.M., and Pattiaratchi, C.B. (2007) Assessing the magnitude and significance of deep chlorophyll maxima in the coastal eastern Indian Ocean. Deep Sea Res. Part II Top. Stud. Oceanogr. 54:884-901.
49. Hawes, I. and Schwartz, A.M.J. (2001) Absorption and utilization of irradiance by cyanobacterial mats in two ice-covered Antarctic lakes with contrasting light climates. J. Phycol. 37:5-15.
50. Hedges, J.I. (1992) Global biogeochemical cycles: progress and problems. Mar. Chem. 39:67-93.
51. Herrera, A., Cockell, C.S., Self, S., Blaxter, M., Reitner, J., Thorsteinsson, T., Arp, G., Dröse, W., and Tindle, A.G. (2009) A cryptoendolithic community in volcanic glass. Astrobiology 9:369-381.
52. Hodges, B.A. and Rudnik, D.L. (2004) Simple models of steady deep chlorophyll maxima in chlorophyll and biomass. Deep Sea Res. Part I Oceanogr. Res. Pap. 51:999-1015.
53. Hoppert, M., Flies, C., Pohl, W., Günzl, B., and Schneider, J. (2004) Colonization strategies of lithobiontic microorganisms on carbonate rocks. Environ. Geol. 46:421-428.
54. Hu, C.X. and Liu, Y.D. (2003) Primary succession of algal community structure in desert soil. Acta Bot. Sin. 45:917-924.
55. Huisman, J., Thi, N.N.P., Karl, D.M., and Sommeijer, B. (2006) Reduced mixing generates oscillations and chaos in the oceanic deep chlorophyll maximum. Nature 439:322-325.
56. Johansen, J.R. (2004) Cryptogamic crusts or semiarid and arid lands of North America. J. Phycol. 29:140-147.
57. Johnston, C.G. and Vestal, J.R. (1991) Photosynthetic carbon incorporation and turnover in Antarctic cryptoendolithic microbial communities: are they the slowest growing communities on Earth? Appl. Environ. Microbiol. 57:2308-2311.
58. Jones. H.G. (1992) Plants and Microclimate. A Quantitative Approach to Environmental Plant Physiology, 2nd ed., Cambridge University Press, Cambridge.
59. Jucks, K.W., Johnson, D.G., Chance, K.V., Traub, W.A., Margitan, J.J., Osterman, G.B., Salawitch, R.J., and Sasano, Y. (1998) Observations of OH, HO2, H2O, and O3 in the upper stratosphere: implications for HOx photochemistry. Geophys. Res. Lett. 25:3935-3938.
60. Kaltenegger, L. and Selsis, F. (2007) Biomarkers set in context. In Extrasolar Planets, edited by Rudolf Dvorak, Wiley-VCH, Hoboken, NJ, pp 79-97.
61. Kaltenegger, L., Jucks, K., and Traub, W. (2007) Spectral evolution of an Earth-like planet. Astrophys. J. 658:598-616.
62. Kiang, N.Y., Siefert, J, Govindjee, and Blankenship, R.E. (2007a) Spectral signatures of photosynthesis. I. Review of Earth organisms. Astrobiology 7:222-251.
63. Kiang, N.Y., Segura, A., Tinetti, G., Govindjee, Blankenship, R.E., Cohen, M., Siefert, J., Crisp, D., and Meadows, V.S. (2007b) Spectral signatures of photosynthesis. II. Coevolution with other stars and the atmosphere on extrasolar worlds. Astrobiology 7:252-274.
64. Klausmeier, C.A. and Litchman, E. (2001) Algal games: the vertical distribution of phytoplankton in poorly mixed water columns. Limnol. Oceanogr. 46:1998-2007.
65. Kurtz, H.D. and Netoff, D.I. (2001) Stabilization of friable sandstone surfaces in a desiccating, wind-abraded environment of south-central Utah by rock surface microorganisms. J. Arid Environ. 48:89-100.
66. Lange, O.L., Kidron, G.J., Büdel, B., Meyer, A., Kilian, E., and Abeliovich, A. (1992) Taxonomic composition and photosynthetic characteristics of the "biological soil crusts" covering sand dunes in the western Negev Desert. Funct. Ecol. 6:519-527.
67. Lange, O.L., Meyer, A., Zellner, H., and Heber, U. (1994) Photosynthesis and water relations of lichen soil crusts- field-measurements in the coastal fog zone of the Namib desert. Funct. Ecol. 8:253-264.
68. Lange, O.L., Green, T.A.G., and Heber, U. (2001) Hydrationdependent photosynthetic production of lichens: what do laboratory studies tell us about field performance? J. Exp. Bot. 52:2033-2042.
69. Lee, S.H. and Whitledge, T.E. (2005) Primary and new production in the deep Canada Basin during summer 2002. Polar Biol. 28:190-197.
70. Léger, A., Pirre, M., and Marceau, F.J. (1993) Search for primitive life on a distant planet: relevance of O2 and O3 detections. Astron. Astrophys. 277:309-313.
71. Léger, A., Selsis, F., Sotin, C., Guillot, T., Despois, D., Mawet, D., Ollivier, M., Labeque, A., Valette, C., Brachet, F., Chazelas, B., and Lammer, H. (2004) A new family of planets? "Ocean- Planets." Icarus 169:499-504.
72. Letelier, R.M., Karl, D.M., Abbott, M.R., and Bidigare, R.R. (2004) Light driven seasonal patterns of chlorophyll and nitrate in the lower euphotic zone of the North Pacific Subtropical Gyre. Limnol. Oceanogr. 49:508-519.
73. Littler, M.M., Littler, D.S., Blair, S.M., and Norris, J.N. (1986) Deep-water plant communities from an uncharted seamount off San Salvador Island, Bahamas: distribution, abundance and primary production. Deep-Sea Research 33:881-892.
74. Lizotte, M.P. (2001) The contributions of sea ice algae to Antarctic primary production. Am. Zool. 41:57-73.
75. MacKey, D.J., Parslow, J., Higgins, H.W., Griffiths, F.B., and O'Sullivan, J.E. (1997) Plankton productivity and biomass in the western equatorial Pacific: biological and physical controls. Deep Sea Res. Part II Top. Stud. Oceanogr. 42:499-533.
76. Matthes-Sears, U., Gerrath, J.A., and Larson, D.W. (1997) Abundance, biomass, and productivity of endolithic and epilithic lower plants on the temperate-zone cliffs of the Niagara Escarpment, Canada. Int. J. Plant. Sci. 158:451-460.
77. Merzlyak, M.N., Chivkunova, O.B., Melø, T.B., and Naqvi, K.R. (2002) Does a leaf absorb radiation in the near infrared (780- 900 nm) region? A new approach to quantifying optical reflection, absorption and transmission of leaves. Photosyn. Res. 72:263-270.
78. Moll. R.A. and Stoermer, E.F. (1982) A hypothesis relating trophic status and subsurface chlorophyll maxima of lakes. Archives of Hydrobiology 94:425-440.
79. Montañés-Rodríguez, P., Pallé, E., and Goode, P.R. (2007) Measurements of the surface brightness of the Earthshine with applications to calibrate lunar flashes. Astron. J. 134:1145-1149.
80. Nienow, J.A. and Friedmann, E.I. (1993) Terrestrial lithophytic (rock) communities. In Antarctic Microbiology, Wiley-Liss, New York, pp 343-412.
81. Nienow, J.A., McKay, C.P., and Friedmann, E.I. (1988) The cryptoendolithic microbial environment in the Ross Desert, Antarctica: light in the photosynthetically active region. Microb. Ecol. 16:271-289.
82. Oren, A., Kühl, M., and Karsten, U. (1995) An endoevaporitic microbial mat within a gypsum crust: zonation of phototrophs, photopigments and light penetration. Marine Ecol. Prog. Ser. 128:151-159.
83. Owen, T. (1980) The search for early forms of life in other planetary systems: future prospects afforded by spectroscopic techniques. In Strategies for the Search for Life in the Universe, edited by M. Papagiannis, D. Riedel, Dordrecht, the Netherlands 83:177-185.
84. Parkinson, C.L. and Gloerson, P. (1993) Global sea ice coverage. In Atlas of Satellite Observations Related to Global Change, edited by R.J. Gurney, J.L. Foster, and C.L. Parkinson, Cambridge University Press, Cambridge, pp 371-383.
85. Pilati, A. and Wurtsbaugh, W.A. (2003) Importance of zooplankton for the persistence of a deep chlorophyll layer: a limnocorral experiment. Limnol. Oceanogr. 48:249-260.
86. Platt, T. and Sathyendranath, S. (1988) Oceanic primary production: estimation by remote sensing at local and regional scales. Science 241:1613-1620.
87. Pollehne, F., Klein, B., and Bernt, Z. (1993) Low light adaptation and export production in the deep chlorophyll maximum layer in the northern Indian Ocean. Deep Sea Res. Part II Top. Stud. Oceanogr. 40:737-752.
88. Priscu, J.C., Fritsen, C.H., Adams, E.E., Giovannoni, S.J., Paerl, H.W., McKay, C.P., Doran, P.T., Gordon, D.A., Lanoil, B.D., and Pinckney, J.L. (1998) Perennial Antarctic lake ice: an oasis for life in a polar desert. Science 280:2095-2098.
89. Rahmonov, O. and Piatek, J. (2007) Sand colonization and initiation of soil development by cyanobacteria and algae. Ekológia 26:52-63.
90. Raven, J.A. (1989) Fight or flight: the economics of repair and avoidance of photoinhibition of photosynthesis. Funct. Ecol. 3:5-19.
91. Raven, J.A. (1995) The early evolution of land plants: aquatic ancestors and atmospheric interactions. Bot. J. Scotl. 47:151-175.
92. Raven, J.A. and Cockell, C.S. (2006) Influence on photosynthesis of starlight, moonlight, planetlight, and light pollution (reflections on photosynthetically active radiation in the universe). Astrobiology 6:668-675.
93. Raven, J.A. and Waite, A.M. (2004) The evolution of silicification in diatoms: inescapable sinking and sinking as escape. New Phytol. 162:45-61.
94. Raven, J.A. and Wolstencroft, R.D. (2004) Constraints on photosynthesis on Earth and Earth-like planets. In Bioastronomy 2002: Life Among the Stars, Proceedings of IAU Symposium #213, edited by R. Norris, and F. Stootman, Astronomical Society of the Pacific, San Francisco, pp 305-308.
95. Raven, J.A., Kübler, J.E., and Beardall, J. (2000) Put out the light, and then put out the light. J. Mar. Biolog. Assoc. U.K. 80: 1-25.
96. Raven, J.A., Cockell, C.S., and de la Rocha, C. (2008) The evolution of inorganic carbon concentrating mechanisms in photosynthesis. Philos. Trans. R. Soc. Lond. B Biol. Sci. 363: 2641-2650.
97. Rothschild, L.J. (1995) A "cryptic" microbial mat: a new model ecosystem for extant life on Mars. Adv. Space Res. 15:223-228.
98. Rothschild, L.J. and Giver, L. (2003) Photosynthesis below the surface in a cryptic microbial mat. Int. J. Astrobiology 1:295-304.
99. Rothschild, L.J., Giver, L.J., White, M.R., and Mancinelli, R.L. (1994) Metabolic activity of microorganisms in evaporites. J. Phycol. 30:431-438.
100. Ruiz, J., Marcías, D., and Peters, F. (2004) Turbulence increases the average settling velocity of phytoplankton cells. Proc. Natl. Acad. Sci. U.S.A. 101:17720-17724.
101. Saiz-Jimenez, C., Garcia-Rowe, J., Garcia del Cura, M.A., Ortega- Calvo, J.J., Roekens, E., and Van Grieken, R. (1990) Endolithic cyanobacteria in Maastricht Limestone. Sci. Total Environ. 94:209-220.
102. Sañudo-Wilhelmy, S., Kustka, A.B., Gobler, C.J., Hutchins, D.A., Yang, M., Lwiza, K., Burns, J., Capone, D.G., Raven, J.A., and Carpenter, E.J. (2001) Phosphorus limitation of nitrogen fixation by Trichodesmium in the Central Atlantic Ocean. Nature 411:66-69.
103. Schlesinger, W.H., Pippen, J.S., Wallenstein, M.D., Hofmockel, K.S., Klepeis, D.M., and Mahall, B.E. (2003) Community composition and photosynthesis by photoautotrophs under quartz pebbles, Southern Mohave Desert. Ecology 84:3222-3231.
104. Schneider, J. and Le Campion-Alsumard, T. (1999) Construction and destruction of carbonates by marine and freshwater cyanobacteria. Eur. J. Phycol. 34:417-426.
105. Seager, S., Turner, E.L., Schafer, J., and Ford, E.B. (2005) Vegetation's red edge-possible spectroscopic biosignature of extraterrestrial plants. Astrobiology 5:372-390.
106. Segura, A., Meadows, V.S., Kasting, J.F., Crisp, D., and Cohen, M. (2007) Abiotic formation of O2 and O3 in high-CO2 terrestrial atmospheres. Astron Astrophys. 472:665-679.
107. Selsis, F., Despois, D., and Parisot, J.-P. (2002), Signature of life on exoplanets: can Darwin produce false positive detections? Astron. Astrophys. 388:985-1003.
108. Selsis, F., Chazelas, B., Bordé, P., Ollivier, M., Brachet, F., Decaudin, M., Bouchy, F., Ehrenreich, D., Grießmeier, J.-M., Lammer, H., Sotin, C., Grasset, O., Moutou, C., Barge, P., Deleuil, M., Mawet, D., Despois, D., Kasting, J.F., and Léger, A. (2007) Could we identify hot ocean-planets with CoRoT, Kepler and Doppler velocimetry? Icarus 191:453-468.
109. Smith, M.C., Bowman, J.P., Scott, F.J., and Line, M.A. (2000) Sublithic bacteria associated with Antarctic quartz stones. Antarct. Sci. 12:177-184.
110. Smits, M. (2006) Mineral tunnelling by fungi. In Fungi in Biogeochemical Cycles, edited by G.M. Gadd, Cambridge University Press, Cambridge, pp 311-327.
111. Spear, J.R., Ley, R.E., Berger, A.B., and Pace, N.R. (2003) Complexity in natural microbial ecosystems: the Guerrero Negro experience. Biol. Bull. 204:168-173.
112. Squyres, S.W., Andersen, D.W., Nedell, S.S., and Wharton, R.A. (1991) Lake Hoare, Antarctica-sedimentation through a thick perennial ice cover. Sedimentology 38:363-379.
113. Stier, M.T. and Traub, W.A. (1978) Far-infrared observations of Uranus, Neptune, and Ceres. Astrophys. J. 226:347-349.
114. Stomp, M., Huisman, J., Stal, L.J., and Matthijs, H.C.P. (2007) Colorful niches of phototrophic microorganisms shaped by vibrations of the water molecule. ISME J. 1:271-282.
115. Strass, V.H. and Woods, J.D. (1991) New production in the summer revealed by the meridonal slope of the deep chlorophyll maximum. Deep Sea Res. A 38:35-56.
116. Tanabe, Y., Kudoh, S., Imura, S., and Fukuchi, M. (2008) Phytoplankton blooms under dim and cold conditions in freshwater lakes of East Antarctica. Polar Biol. 31:199-208.
117. Thomas, A.D. and Dougill, A.J. (2006) Distribution and characteristics of cyanobacterial soil crusts in the Molopo Basin, South Africa. J. Arid Environ. 64:270-283.
118. Thomas, D.N. and Dieckmann, G.S. (2002) Antarctic sea ice-a habitat for extremophiles. Science 295:641-644.
119. Tinetti, G., Meadows, V.S., Crisp, D., Fong, W., Fishbein, E., Turnbull, M., and Bibring, J-P. (2006). Detectability of planetary characteristics in disk-averaged spectra. I: The Earth model. Astrobiology 6:34-47.
120. Traub, W.A. and Jucks, K. (2002) A possible aeronomy of extrasolar planets. In Atmospheres in the Solar System: Comparative Aeronomy, Vol.130, edited by M. Mendillo, A. Nagy, and J.H. Waite, AGU Monograph Series, American Geophysical Union, Washington DC, pp 369-380.
121. Tretiach, M. and Pecchiari, M. (1995) Gas exchange rates and chlorophyll content of epi- and endolithic lichens from the Trieste Karts (NE Italy). New Phytol. 130:585-592.
122. Turnbull, M.C., Traub, W.A., Jucks, K.W., Woolf, N.J., Meyer, M.R., Gorlova, N., Skrutskie, M.F., and Wilson, J.C. (2006). Spectrum of a habitable world: Earthshine in the nearinfrared. Astrophys. J. 644:551-559.
123. Vestal, J.R. (1988) Primary production of the cryptoendolithic microbiota from the Antarctic desert. Polarforschung 58:193-198.
124. Warren-Rhodes, K.A., Rhodes, K.L., Pointing, S.B., Ewing, S.A., Lacap, D.C., Gomez-Silva, B., Amundson, R., Friedmann, E.I., and McKay, C.P. (2006) Hypolithic cyanobacteria, dry limit of photosynthesis, and microbial ecology in the hyperarid Atacama Desert. Microb. Ecol. 52:389-398.
125. Wessels, D.C.J. and Büdel, B. (1995) Epilithic and cryptoendolithic cyanobacteria of Clarens sandstone cliffs in the Golden Gate Highlands National Park, South Africa. Bot. Acta 108:220-226.
126. Weston, K., Fernand, L., Mills, D.K., Delahunty, R., and Brown, J. (2005) Primary production in the deep chlorophyll maximum of the central North Sea. J. Plankton Res. 27:909-922.
127. Weston, K., Fernad, L., Nicholls, J., Marca-Bell, A., Mills, D., Sivyer, D., and Trimmer, M. (2008) Sedimentary and water column processes in the Oyster Grounds: a potentially hypoxic region of the North Sea. Mar. Environ. Res. 65:235-249.
128. Whittacker, R.H. (1975) Communities and Ecosystems, Macmillian Publishing, New York.
129. Wierzchos, J., Ascaso, C., and McKay, C.P. (2006). Endolithic cyanobacteria in halite rocks from the hyperarid core of the Atacama Desert. Astrobiology 6:415-422.
130. Wolstencroft, R.D. and Raven, J.A. (2002) Photosynthesis- likelihood of occurrence and possibility of detection on Earthlike planets. Icarus 157:535-548.
131. Woolf, N.J., Smith, P.S., Traub, W.A., and Jucks, K.W. (2002) The spectrum of Earthshine: a pale blue dot observed from the ground. Astrophys. J. 574:430-433.
132. Xiu, P., Liu, Y.G., and Yin, X.B. (2007) Preliminary study on distribution of deep chlorophyll maximum and remote sensing model in the Bohai Sea of China. Int. J. Remote Sens. 28:2599-2612.
133. Zimov, S.A., Schuur, E.A.G., and Chapin, F.S. (2006) Permafrost and the global carbon sink. Science 312:1612-1613.