Halogenated hydrocarbon formation in a moderately acidic salt lake in Western Australia – role of abiotic and biotic processes
A. Ruecker A , P. Weigold A , S. Behrens A , M. Jochmann B , X. L. Osorio Barajas B and A. Kappler A C
+ Author Affiliations
- Author Affiliations
A Geomicrobiology, Centre for Applied Geosciences, University of Tuebingen, Sigwartstraße 10, D-72076 Tuebingen, Germany.
B Instrumental Analytical Chemistry, Faculty of Chemistry, University of Duisburg-Essen, Universitätsstraße 5, D-45141 Essen, Germany.
C Corresponding author. Email: andreas.kappler@uni-tuebingen.de
Environmental Chemistry 12(4) 406-414 https://doi.org/10.1071/EN14202
Submitted: 27 September 2014 Accepted: 23 December 2014 Published: 2 June 2015
Environmental context. Volatile halogenated organic compounds (VOX) contribute to ozone depletion and global warming. Here we demonstrate that acidic salt lake sediments in Western Australia contribute to the global natural emission of these compounds and that the emissions are primarily of biotic origin. Elucidating major sources and sinks of VOX is a key task in environmental chemistry because their formation and degradation have major effects on atmospheric chemistry and thus earth climate.
Abstract. Volatile organohalogen compounds (VOX) are known environmental pollutants and contribute to stratospheric ozone depletion. Natural formation of VOX has been shown for many environments from the deep sea to forest soils and Antarctica. Recently, we showed that VOX are emitted from pH-neutral salt lakes in Western Australia and that they are mainly of biotic origin. To which extent this biotic organohalogen formation in salt lakes is pH-dependent and whether VOX are also formed under acidic conditions are unknown. Therefore, we quantified VOX emissions from an acidic salt lake in Western Australia (Lake Orr) in biotic and abiotic (γ ray-irradiated) microcosm experiments under controlled laboratory conditions. The experiments revealed that biotic halogenation processes also occurred under acidic conditions (pH range 3.8–4.8), though the emissions were approximately one order of magnitude lower (nanogram per kilogram dry sediment range) than from pH-neutral lake sediments. Among the detected substances were brominated, e.g. tribromomethane, as well as chlorinated compounds (e.g. trichloromethane). The addition of lactate and acetate, and ferrihydrite showed no stimulation of VOX formation in our microcosms. Hence, the stimulation of Fe-metabolising microorganisms and their potential effect on the formation of reactive Fe species did not promote VOX emissions, suggesting a direct enzymatic formation of the emitted compounds.
References
[1] R. J. Cicerone, R. S. Stolarski, S. Walters, Stratospheric ozone destruction by man-made chlorofluoromethanes. Science 1974, 185, 1165.| Stratospheric ozone destruction by man-made chlorofluoromethanes.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaE2cXlslGntrs%3D&md5=e644397d76220439cbb4182ad954c8b7CAS | 17835469PubMed |
[2] J. E. Lovelock, Natural halocarbons in the air and in the sea. Nature 1975, 256, 193.
| Natural halocarbons in the air and in the sea.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaE28Xnslahsg%3D%3D&md5=bda8c3c8bb9c9946bef93cca7cc9e230CAS | 1152986PubMed |
[3] G. W. Gribble, Naturally Occurring Organohalogen Compounds – A Comprehensive Update (Eds A. D. Kinghorn, H. Falk, J. Koboyashi) 2010 (Springer Vienna: Vienna).
[4] S. G. Huber, K. Kotte, H. F. Schöler, J. Williams, Natural abiotic formation of trihalomethanes in soil: results from laboratory studies and field samples. Environ. Sci. Technol. 2009, 43, 4934.
| Natural abiotic formation of trihalomethanes in soil: results from laboratory studies and field samples.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXmtVGnsbY%3D&md5=878e371b694f0cd74e15b81156df73f5CAS | 19673288PubMed |
[5] C. Aeppli, D. Bastviken, P. Andersson, Ö. Gustafsoon, Chlorine isotope effects and composition of naturally produced organochlorines from chloroperoxidases, flavin-dependent halogenases, and in forest soil. Environ. Sci. Technol. 2013, 47, 6864.
| 1:CAS:528:DC%2BC3sXns1egsQ%3D%3D&md5=e23c5b8f31ca5b7044527e72a61d1d0aCAS | 23320408PubMed |
[6] C. S. Neumann, D. G. Fujimori, C. T. Walsh, Halogenation strategies in natural product biosynthesis. Chem. Biol. 2008, 15, 99.
| Halogenation strategies in natural product biosynthesis.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXitlKhsrg%3D&md5=07c0f3522eece895813260763b8ca6ffCAS | 18291314PubMed |
[7] C. Wagner, M. El Omari, G. M. Ko, Biohalogenation: Nature’s way to synthesize halogenated metabolites. J. Nat. Prod. 2009, 72, 540.
| Biohalogenation: Nature’s way to synthesize halogenated metabolites.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXisVKkurg%3D&md5=dca249ca5f56cb3c1bed5925aad494b6CAS | 19245259PubMed |
[8] F. Breider, D. Hunkeler, Investigating chloroperoxidase-catalyzed formation of chloroform from humic substances using stable chlorine isotope analysis. Environ. Sci. Technol. 2014, 48, 1592.
| Investigating chloroperoxidase-catalyzed formation of chloroform from humic substances using stable chlorine isotope analysis.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXitVWmtL3M&md5=24f20d44b72b06197ace9a13cf6a65b1CAS | 24377317PubMed |
[9] F. Keppler, R. Borchers, J. Pracht, S. Rheinberger, H. F. Schöler, Natural formation of vinyl chloride in the terrestrial environment. Environ. Sci. Technol. 2002, 36, 2479.
| Natural formation of vinyl chloride in the terrestrial environment.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38XivVGgtLo%3D&md5=810e268850daecade50562ef616034a3CAS | 12075808PubMed |
[10] R. Wever, M. A. van der Horst, The role of vanadium haloperoxidases in the formation of volatile brominated compounds and their impact on the environment. Dalton Trans. 2013, 42, 11 778.
| The role of vanadium haloperoxidases in the formation of volatile brominated compounds and their impact on the environment.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXhtF2isLbI&md5=18f4e6b4812f7c334909bb89e13730faCAS |
[11] E. J. Hoekstra, E. W. B. de Leer, U. A. T. Brinkman, Natural formation of chloroform and brominated trihalomethanes in soil. Environ. Sci. Technol. 1998, 32, 3724.
| Natural formation of chloroform and brominated trihalomethanes in soil.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1cXmsFWksL8%3D&md5=bc59f0cb00d48c535e2d9bcb6b9e28f2CAS |
[12] F. Keppler, R. Eiden, V. Niedan, J. Pracht, H. F. Schöler, Halocarbons produced by natural oxidation processes during degradation of organic matter. Nature 2000, 403, 298.
| Halocarbons produced by natural oxidation processes during degradation of organic matter.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3cXns1ChsA%3D%3D&md5=c99967dc51e17d29c8d517dfdab9200dCAS | 10659846PubMed |
[13] N. Clarke, K. Fuksová, M. Gryndler, Z. Lachmanová, H.-H. Liste, J. Rohlenová, S. Schroll, P. Schroeder, M. Matucha, The formation and fate of chlorinated organic substances in temperate and boreal forest soils. Environ. Sci. Pollut. Res. Int. 2009, 16, 127.
| The formation and fate of chlorinated organic substances in temperate and boreal forest soils.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXitlGmtrY%3D&md5=6dcbede8d376072935b8fe9987fd7120CAS | 19104865PubMed |
[14] D. Bastviken, T. Svensson, S. Karlsson, P. Sandén, G. Oberg, Temperature sensitivity indicates that chlorination of organic matter in forest soil is primarily biotic. Environ. Sci. Technol. 2009, 43, 3569.
| Temperature sensitivity indicates that chlorination of organic matter in forest soil is primarily biotic.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXjvFKksb0%3D&md5=4957016aff66af1fb629c95e715d380cCAS | 19544856PubMed |
[15] C. N. Albers, O. S. Jacobsen, É. M. M. Flores, J. S. F. Pereira, T. Laier, Spatial variation in natural formation of chloroform in the soils of four coniferous forests. Biogeochemistry 2011, 103, 317.
| Spatial variation in natural formation of chloroform in the soils of four coniferous forests.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXisVKiurc%3D&md5=60346cbbfc889b0fdcf363e677388960CAS |
[16] P. M. Gschwend, J. K. MacFarlane, K. A. Newman, Volatile halogenated organic compounds released to seawater from temperate marine macroalgae. Science 1985, 227, 1033.
| Volatile halogenated organic compounds released to seawater from temperate marine macroalgae.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL2MXhsFCnsrc%3D&md5=18174824e00a0911a3e756c90e0b947eCAS | 17794227PubMed |
[17] K. Ballschmiter, Pattern and sources of naturally produced organohalogens in the marine environment: biogenic formation of organohalogens. Chemosphere 2003, 52, 313.
| Pattern and sources of naturally produced organohalogens in the marine environment: biogenic formation of organohalogens.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3sXjsVGnsLg%3D&md5=61e3cf9aaf5aa9aa8ec0b25ff4eefa02CAS | 12738255PubMed |
[18] C. Paul, G. Pohnert, Production and role of volatile halogenated compounds from marine algae. Nat. Prod. Rep. 2011, 28, 186.
| Production and role of volatile halogenated compounds from marine algae.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXhtVWisrg%3D&md5=aeb551123c725a3be66345aea7eb1be0CAS | 21125112PubMed |
[19] R. C. Rhew, B. R. Miller, R. F. Weiss, Natural methyl bromide and methyl chloride emissions from coastal salt marshes. Nature 2000, 403, 292.
| Natural methyl bromide and methyl chloride emissions from coastal salt marshes.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3cXns1Chsg%3D%3D&md5=71a507101c661b0ddf5b379fb1d47bf0CAS | 10659844PubMed |
[20] L. Weissflog, C. A. Lange, A. Pfennigsdorff, K. Kotte, N. Elansky, L. Lisitzyna, E. Putz, G. Krueger, Sediments of salt lakes as a new source of volatile highly chlorinated C1/C2 hydrocarbons. Geophys. Res. Lett. 2005, 32, L01401.
| Sediments of salt lakes as a new source of volatile highly chlorinated C1/C2 hydrocarbons.Crossref | GoogleScholarGoogle Scholar |
[21] B. V. Timms, Study of the saline lakes of the Esperance hinterland, Western Australia, with special reference to the roles of acidity and episodicity. Nat. Resour. Env. Iss. 2009, 15, 1.
[22] M. Emmerich, A. Bhansali, T. Lösekann-Behrens, C. Schröder, A. Kappler, S. Behrens, Abundance, distribution, and activity of Fe(II)-oxidizing and Fe(III)-reducing microorganisms in hypersaline sediments of Lake Kasin, southern Russia. Appl. Environ. Microbiol. 2012, 78, 4386.
| Abundance, distribution, and activity of Fe(II)-oxidizing and Fe(III)-reducing microorganisms in hypersaline sediments of Lake Kasin, southern Russia.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XpvFKgt78%3D&md5=062428e74387b1e18baf098fe8dc8537CAS | 22504804PubMed |
[23] A. M. Wuosmaa, L. P. Hager, Methyl chloride transferase: a carbocation route for biosynthesis of halometabolites. Science 1990, 249, 160.
| Methyl chloride transferase: a carbocation route for biosynthesis of halometabolites.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK3cXls1Oktbc%3D&md5=96e30f3bd640a13fca0e651ae62bd880CAS | 2371563PubMed |
[24] R. Rhew, O. Mazéas, Gross production exceeds gross consumption of methyl halides in northern California salt marshes. Geophys. Res. Lett. 2010, 37, L18813.
| Gross production exceeds gross consumption of methyl halides in northern California salt marshes.Crossref | GoogleScholarGoogle Scholar |
[25] R. C. Rhew, M. E. Whelan, D. H. Min, Large methyl halide emissions from south Texas salt marshes. Biogeosciences Discuss. 2014, 11, 9451.
| Large methyl halide emissions from south Texas salt marshes.Crossref | GoogleScholarGoogle Scholar |
[26] E. Blei, M. R. Heal, K. V. Heal, Long-term CH3Br and CH3Cl flux measurements in temperate salt marshes. Biogeosciences 2010, 7, 3657.
| Long-term CH3Br and CH3Cl flux measurements in temperate salt marshes.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXntlKkt7w%3D&md5=a67ce21335ecee343367b354fc7c22b0CAS |
[27] J. Drewer, M. R. Heal, K. V. Heal, K. A. Smith, Temporal and spatial variation in methyl bromide flux from a salt marsh. Geophys. Res. Lett. 2006, 33, L16808.
| Temporal and spatial variation in methyl bromide flux from a salt marsh.Crossref | GoogleScholarGoogle Scholar |
[28] K. Kotte, F. Löw, S. G. Huber, T. Krause, I. Mulder, H. F. Schöler, Organohalogen emissions from saline environments – spatial extrapolation using remote sensing as most promising tool. Biogeosciences 2012, 9, 1225.
| Organohalogen emissions from saline environments – spatial extrapolation using remote sensing as most promising tool.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38Xhs1Gks7rO&md5=c6e4c3c07f3491cdc925585d2719331fCAS |
[29] A. Ruecker, P. Weigold, S. Behrens, M. Jochmann, J. Laaks, A. Kappler, Predominance of biotic over abiotic formation of halogenated hydrocarbons in hypersaline sediments in Western Australia. Environ. Sci. Technol. 2014, 48, 9170.
| Predominance of biotic over abiotic formation of halogenated hydrocarbons in hypersaline sediments in Western Australia.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC2cXhtFyns7jN&md5=acef6f91cff86cf6dd527ba4a3a988a0CAS | 25073729PubMed |
[30] I. J. Fahimi, F. Keppler, H. F. Schöler, Formation of chloroacetic acids from soil, humic acid and phenolic moieties. Chemosphere 2003, 52, 513.
| Formation of chloroacetic acids from soil, humic acid and phenolic moieties.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3sXjsVGntrk%3D&md5=ca850a8b72d3eb0a3fc45390cf1e8d8dCAS | 12738276PubMed |
[31] T. Krause, C. Tubbesing, K. Benzing, H. F. Schöler, Model reactions and natural occurrence of furans from hypersaline environments. Biogeosciences Discuss. 2013, 10, 17 439.
| Model reactions and natural occurrence of furans from hypersaline environments.Crossref | GoogleScholarGoogle Scholar |
[32] T. Krause, Natural Occurrence of Volatile Mono-/Polyhalogenated and Aromatic/Heteroaromatic Hydrocarbons from Hypersaline Environments 2014, Ph.D. thesis, University of Heidelberg, Germany.
[33] J. Laaks, M. A. Jochmann, B. Schilling, T. C. Schmidt, In-tube extraction of volatile organic compounds from aqueous samples: an economical alternative to purge-and-trap enrichment. Anal. Chem. 2010, 82, 7641.
| In-tube extraction of volatile organic compounds from aqueous samples: an economical alternative to purge-and-trap enrichment.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXhtVCksL7O&md5=32a2e82ca608f6e215ff5b4cb0b192f1CAS | 20722393PubMed |
[34] U. Schwertmann, R. M. Cornell, Ferrihydrite, in Iron Oxides in the Laboratory 2007, pp. 103–112 (Wiley-VCH Verlag GmbH: Weinheim, Germany).
[35] K. Amstaetter, T. Borch, A. Kappler, Influence of humic substance-imposed changes of ferrihydrite aggregation on microbial Fe(III) reduction. Geochim. Cosmochim. Acta 2012, 85, 326.
| Influence of humic substance-imposed changes of ferrihydrite aggregation on microbial Fe(III) reduction.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XlvVGgs78%3D&md5=c9a6207b582a107c3810127eeb9958c7CAS |
[36] J. T. Trevors, Sterilization and inhibition of microbial activity in soil. J. Microbiol. Methods 1996, 26, 53.
| Sterilization and inhibition of microbial activity in soil.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK28XltFOnt7Y%3D&md5=a6d6cbd7437fc5b6f179dabec137cf4cCAS |
[37] A. E. Berns, H. Philipp, H.-D. Narres, P. Burauel, H. Vereecken, W. Tappe, Effect of gamma-sterilization and autoclaving on soil organic matter structure as studied by solid-state NMR, UV and fluorescence spectroscopy. Eur. J. Soil Sci. 2008, 59, 540.
| Effect of gamma-sterilization and autoclaving on soil organic matter structure as studied by solid-state NMR, UV and fluorescence spectroscopy.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXnvVOisrs%3D&md5=d64c989c910ad7a5006bb3ca302e6617CAS |
[38] N. Fierer, R. B. Jackson, The diversity and biogeography of soil bacterial communities. Proc. Natl. Acad. Sci. USA 2006, 103, 626.
| The diversity and biogeography of soil bacterial communities.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD28XhtVOiurY%3D&md5=20692fe32ac6827e9a21e45a1b5d0686CAS | 16407148PubMed |
[39] R. J. Cicerone, L. E. Heidt, W. H. Pollock, Measurements of atmospheric methyl bromide and bromoform. J. Geophys. Res. Atmos. 1988, 93, 3745.
| Measurements of atmospheric methyl bromide and bromoform.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL1cXkt1Krurg%3D&md5=16643e810f495e7f39d2d000b0c7163fCAS |
[40] K. D. Goodwin, R. K. Varner, P. M. Crill, R. S. Oremland, Consumption of tropospheric levels of methyl bromide by C1 compound-utilizing bacteria and comparison to saturation kinetics. Appl. Environ. Microbiol. 2001, 67, 5437.
| Consumption of tropospheric levels of methyl bromide by C1 compound-utilizing bacteria and comparison to saturation kinetics.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3MXovFehsLg%3D&md5=a87a2be26677ef17bca86efef45a0ca0CAS | 11722890PubMed |
[41] R. C. Rhew, B. R. Miller, R. F. Weiss, Chloroform, carbon tetrachloride and methyl chloroform fluxes in southern California ecosystems. Atmos. Environ. 2008, 42, 7135.
| Chloroform, carbon tetrachloride and methyl chloroform fluxes in southern California ecosystems.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXhtFSqsr7F&md5=2d516153b7c151df49dcb037a2f4ebacCAS |
[42] N. Yassaa, A. Wishkerman, F. Keppler, J. Williams, Fast determination of methyl chloride and methyl bromide emissions from dried plant matter and soil samples using HS-SPME and GC-MS: method and first results. Environ. Chem. 2009, 6, 311.
| Fast determination of methyl chloride and methyl bromide emissions from dried plant matter and soil samples using HS-SPME and GC-MS: method and first results.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXhsVSlu77N&md5=0d8a6fe2197e80f29b84df382f119413CAS |
[43] B. Kuyper, C. Labuschagne, R. Philibert, N. Moyo, H. Waldron, C. Reason, C. Palmer, Development of a simplified, cost effective GC-ECD methodology for the sensitive detection of bromoform in the troposphere. Sensors 2012, 12, 13583.
| Development of a simplified, cost effective GC-ECD methodology for the sensitive detection of bromoform in the troposphere.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38Xhs1OisLjP&md5=422427e102c07259b7f8955acc21142fCAS | 23202011PubMed |
[44] E. D. Melton, E. D. Swanner, S. Behrens, C. Schmidt, A. Kappler, The interplay of microbially mediated and abiotic reactions in the biogeochemical Fe cycle. Nat. Rev. Microbiol. 2014, 12, 797.
| The interplay of microbially mediated and abiotic reactions in the biogeochemical Fe cycle.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC2cXhslOktL%2FF&md5=33faef1de8cde934836b470a0b15c6a4CAS | 25329406PubMed |
[45] R. G. Zepp, B. C. Faust, J. Hoigne, Hydroxyl radical formation in aqueous reactions (pH 3–8) of iron(II) with hydrogen peroxide: the photo-Fenton reaction. Environ. Sci. Technol. 1992, 26, 313.
| Hydroxyl radical formation in aqueous reactions (pH 3–8) of iron(II) with hydrogen peroxide: the photo-Fenton reaction.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK38XksFyjsw%3D%3D&md5=a5a61719bafa3c18bed93ddc86a1f20cCAS |
[46] S. E. Page, M. Sander, W. A. Arnold, K. McNeill, Hydroxyl radical formation upon oxidation of reduced humic acids by oxygen in the dark. Environ. Sci. Technol. 2012, 46, 1590.
| Hydroxyl radical formation upon oxidation of reduced humic acids by oxygen in the dark.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXhs1OjtLjL&md5=4534c335e90767bb6c3cad370cbb8e98CAS | 22201224PubMed |
[47] K. Pecher, S. B. Haderlein, R. P. Schwarzenbach, Reduction of polyhalogenated methanes by surface-bound Fe(II) in aqueous suspensions of iron oxides. Environ. Sci. Technol. 2002, 36, 1734.
| Reduction of polyhalogenated methanes by surface-bound Fe(II) in aqueous suspensions of iron oxides.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38XhslOgtL4%3D&md5=b4a4eb8eeff40364a23f0e8e8347fd07CAS | 11993871PubMed |
[48] A. Kappler, S. B. Haderlein, Natural organic matter as reductant for chlorinated aliphatic pollutants. Environ. Sci. Technol. 2003, 37, 2714.
| Natural organic matter as reductant for chlorinated aliphatic pollutants.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3sXjs1Gltrc%3D&md5=2de347b8595093bbc16058908c9979c8CAS | 12854710PubMed |
[49] B. Kjellerup, C. Naff, S. J. Edwards, U. Ghosh, J. E. Baker, K. R. Sowers, Effects of activated carbon on reductive dechlorination of PCBs by organohalide respiring bacteria indigenous to sediments. Water Res. 2014, 52, 1.
| Effects of activated carbon on reductive dechlorination of PCBs by organohalide respiring bacteria indigenous to sediments.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC2cXjtVGgt7c%3D&md5=857f5cc657673a77ef2368eac1f3426dCAS | 24440760PubMed |
[50] W. D. Williams, Anthropogenic salinisation of inland waters. Hydrobiologia 2001, 466, 329.
| Anthropogenic salinisation of inland waters.Crossref | GoogleScholarGoogle Scholar |
[51] C. J. Clarke, R. J. George, R. W. Bell, T. J. Hatton, Dryland salinity in south-western Australia: its origins, remedies, and future research directions. Soil Res. 2002, 40, 93.
| Dryland salinity in south-western Australia: its origins, remedies, and future research directions.Crossref | GoogleScholarGoogle Scholar |
[52] S. A. Halse, J. K. Ruprecht, A. M. Pinder, Salinisation and prospects for biodiversity in rivers and wetlands of south-west Western Australia. Aust. J. Bot. 2003, 51, 673.
| Salinisation and prospects for biodiversity in rivers and wetlands of south-west Western Australia.Crossref | GoogleScholarGoogle Scholar |
[53] W. Huang, X. Bu, L. Nguyen, R. H. Gammon, Production and consumption of methyl halides in a freshwater lake. Limnol. Oceanogr. 2000, 45, 1537.
| Production and consumption of methyl halides in a freshwater lake.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3cXosFymt70%3D&md5=635de5b5b9b55a5b26ba063fadd66b4dCAS |
[54] B. V. Timms, Salt lakes in Australia: present problems and prognosis for the future. Hydrobiologia 2005, 552, 1.
| Salt lakes in Australia: present problems and prognosis for the future.Crossref | GoogleScholarGoogle Scholar |
[55] S. A. Halse, M. N. Lyons, A. M. Pinder, R. J. Shiel, Biodiversity patterns and their conservation in wetlands of the Western Australian wheat-belt. Rec. West. Aust. Museum 2004, 67, 337.
[56] R. V. Schofield, M. J. Kirkby, Application of salinization indicators and initial development of potential global soil salinization scenario under climatic change. Global Biogeochem. Cycles 2003, 17, 1078.
| Application of salinization indicators and initial development of potential global soil salinization scenario under climatic change.Crossref | GoogleScholarGoogle Scholar |
[57] R. J. Short, C. McConnell, Extent and impacts of dryland salinity. Resource Management Technical Report 202 2001 (Department of Agriculture and Food: Perth, WA).
[58] S. L. Manley, N.-Y. Wang, M. L. Walser, R. J. Cicerone, Coastal salt marshes as global methyl halide sources from determinations of intrinsic production by marsh plants. Global Biogeochem. Cycles 2006, 20, GB3015.
| Coastal salt marshes as global methyl halide sources from determinations of intrinsic production by marsh plants.Crossref | GoogleScholarGoogle Scholar |
[59] H. Hepach, B. Quack, F. Ziska, S. Fuhlbruegge, E. L. Atlas, K. Krüger, I. Peeken, D. W. R. Wallace, Drivers of diel and regional variations of halocarbon emissions from the tropical north-east Atlantic. Atmos. Chem. Phys. 2014, 14, 1255.
| Drivers of diel and regional variations of halocarbon emissions from the tropical north-east Atlantic.Crossref | GoogleScholarGoogle Scholar |
[60] I. Weinberg, E. Bahlmann, W. Michaelis, R. Seifert, Determination of fluxes and isotopic composition of halocarbons from seagrass meadows using a dynamic flux chamber. Atmos. Environ. 2013, 73, 34.
| Determination of fluxes and isotopic composition of halocarbons from seagrass meadows using a dynamic flux chamber.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXnsVyktr4%3D&md5=c72566fc4073bec8916d38258f26ff00CAS |
[61] I. Weinberg, E. Bahlmann, T. Eckhardt, W. Michaelis, R. Seifert, A halocarbon survey from a seagrass-dominated subtropical lagoon, Ria Formosa (Portugal): flux pattern and isotopic composition. Biogeosciences Discuss. 2014, 11, 10 605.
| A halocarbon survey from a seagrass-dominated subtropical lagoon, Ria Formosa (Portugal): flux pattern and isotopic composition.Crossref | GoogleScholarGoogle Scholar |
