Methane

Physical disturbance to ecological niches created by soil structure alters community composition of methanotrophs

by deepak kumaresan

Variations in free-phase gases in peat landforms determined by ground-penetrating radar

by Andrew Parsekian

Evaluation of methane production and macronutrient degradation in the anaerobic co-digestion of algae biomass residue and lipid waste

by Stephen Park

Co-authored with Yebo Li
Published in Bioresource Technology. 2012.111: 42-48.

Algae biomass residue was co-digested with lipid-rich fat, oil, and grease waste (FOG) to evaluate the effect on... more Algae biomass residue was co-digested with lipid-rich fat, oil, and grease waste (FOG) to evaluate the effect on methane yield and macronutrient degradation. Co-digestion of algae biomass residue and FOG, each at 50% of the organic loading, allowed for an increased loading rate up to 3 g VS/L•d, resulting in a specific methane yield of 0.54 L CH4/g VS•d and a volumetric reactor productivity of 1.62 L CH4/L•d. Lipids were the key contributor to methane yields, accounting for 68-83% of the total methane potential. Co-digestion with algae biomass residue fractions of 33%, 50%, and 67% all maintained lipid degradations of at least 60% when the organic loading rate was increased to 3 g VS/L•d, while synergetic effects on carbohydrate and protein degradation were less evident with increased loading.

Emissões: Os impactos mais renegados das hidrelétricas.

by Philip Fearnside

Fearnside, P.M. 2011. Emissões: Os impactos mais renegados das hidrelétricas. Contra Corrente, No. 3: 27-30.

Hidrelétricas amazônicas e a política energética

by Philip Fearnside

Fearnside, P.M. 2011. Hidrelétricas amazônicas e a política energética –. Globoamazonia. http://g1.globo.com/platb/natureza-philipfearnside

Greenhouse gas emissions from hydroelectric dams: controversies provide a springboard for rethinking a supposedly 'clean'energy source. An editorial comment

by Philip Fearnside

Belo Monte: Globo Amazônia série completa

by Philip Fearnside

Fearnside, P.M. 2009-2010. Belo Monte: Globo Amazônia série completa. http://colunas.globoamazonia.com/philipfearnside/

Hydroelectric dams in Brazilian Amazonia: Response to Rosa, Schaeffer & dos Santos.

by Philip Fearnside

Fearnside, P.M. 1996. Hydroelectric dams in Brazilian Amazonia: Response to Rosa, Schaeffer & dos Santos. Environmental Conservation 23(2): 105-108. doi:10.1017/S0376892900038467

See Amazon Controversies:
http://philip.inpa.gov.br/publ_livres/AMAZONIAN CONTROVERSIES.htm

Comments by Philip M. Fearnside.18 Oct.1999. [on World Commission on Dams Thematic Review II.2 on greenhouse gas emissions from hydroelectric dams].

by Philip Fearnside

Fearnside, P.M. 2000. Comments by Philip M. Fearnside.18 Oct.1999. [on World Commission on Dams Thematic Review II.2 on greenhouse gas emissions from hydroelectric dams]. World Commission on Dams, Capetown, South Africa. pp. 85-88. (www.dams.org/docs/kbase/thematic/ drafts/tr22_part2_finaldraft.pdf)

Gases estufa e radiação [Response to W. Alexandre].

by Philip Fearnside

Fearnside, P.M. 2005. Gases estufa e radiação [Response to W. Alexandre]. Ciência Hoje 36(213): 80.

Metano em hidrelétricas [Response to N. de Ávila].

by Philip Fearnside

Fearnside, P.M. 2005. Metano em hidrelétricas [Response to N. de Ávila]. Ciência Hoje 36(213): 80.

Dirty hydros [Response to Graham Faichney]

by Philip Fearnside

Fearnside, P.M. 2005. Dirty hydros [Response to Graham Faichney] New Scientist 186(2494): 24 (9 April 2005).

Pareceres dos consultores sobre o Estudo de Impacto Ambiental do Projeto para aproveitamento hidrelétrica de Santo Antônio e Jirau, Rio Madeira-RO. Parecer Técnico sobre ecossistemas. Parte B, Volume 1, Parecer 8

by Philip Fearnside

Fearnside, P.M. 2006. Pareceres dos consultores sobre o Estudo de Impacto Ambiental do Projeto para aproveitamento hidrelétrica de Santo Antônio e Jirau, Rio Madeira-RO. Parecer Técnico sobre ecossistemas. Parte B, Volume 1, Parecer 8, pp. 1-15 In: Pareceres Técnicos dos Especialistas Setoriais—Aspectos Físicos/Bióticos. Relatório de Análise do Conteúdo dos Estudos de Impacto Ambiental (EIA) e do Relatório de Impacto Ambiental (RIMA) dos Aproveitamentos Hidrelétricos de Santo Antônio e Jirau no, Rio Madeira, Estado de Rondônia. Ministério Público do Estado de Rondônia, Porto Velho, Rondônia. 2 Vols. http://www.mp.ro.gov.br/web/guest/Interesse-Publico/Hidreletrica-Madeira

Dirty hydros [Response to Graham Faichney]

by Philip Fearnside

Fearnside, P.M. 2005. Dirty hydros [Response to Graham Faichney] New Scientist 186(2494): 24 (9 April 2005).

Controvérsias sobre o efeito estufa. Por que a energia hidrelétrica não é limpa.

by Philip Fearnside

Fearnside, P.M. 2008. Controvérsias sobre o efeito estufa. Por que a energia hidrelétrica não é limpa. pp. 270-271 In: I. S. Gorayeb (ed.). Amazônia. Jornal "O Liberal"/VALE, Belém, Pará. 384 pp. ISBN 978-85-61628-00-0 [também publicado no jornal O Liberal 30 Jan. 2008].

See Amazon Controversies:
http://philip.inpa.gov.br/publ_livres/AMAZONIAN CONTROVERSIES.htm

English version:
Fearnside, P.M. 2007. Why hydropower is not clean energy. Scitizen, Paris, France (peer-reviewed website). http://www.scitizen.com/screens/blogPage/viewBlog/sw_viewBlog.php?idTheme=14&idContribution=298
http://philip.inpa.gov.br/publ_livres/2007/Why hydro not clean energy-Article as posted.pdf

Methane emissions from hydroelectric dams

by Philip Fearnside

Fearnside, P.M. 2011. Methane emissions from hydroelectric dams. Science (E-Letter 28 July 2011), http://www.sciencemag.org/content/331/6013/50.short/reply#sci_el_14254

Characterization of methane flux and oxidation at a solid waste landfill

by Jennifer Stern

Isotopic variation complicates analysis of trophic relations within the fish community of Plußsee: a small, deep, stratifying lake

by Chris Harrod

Harrod, C. & Grey, J. (2006). Isotopic variation complicates analysis of trophic relations within the fish community of Plußsee: a small, deep, stratifying lake. Archiv für Hydrobiologie 167, 281-299.

Analysis of carbon and nitrogen stable isotopes has allowed freshwater ecologists to examine lake food webs in... more Analysis of carbon and nitrogen stable isotopes has allowed freshwater ecologists to examine lake food webs in increasing detail. Many such studies have highlighted the existence of separate within-lake pelagic and benthic-littoral food webs but are typically conducted on large (> 10 km2) lakes, whereas the majority of lakes are actually relatively small. We used stable isotope analysis (δ13C & δ15N) to examine trophic interactions between fish and their prey in Plußsee, as an example of a small, stratifying lake, and to determine whether separate pelagic/benthic-littoral food webs could be distinguished in such systems. Our results indicate that the Plußsee food web was complicated, and due to extensive intra-annual isotopic variation in zooplankton (e.g. cladoceran δ13C annual range = 25.6‰), it may be impossible to definitively assign consumers from small, eutrophic stratified lakes to pelagic or benthic-littoral food webs. We present evidence that some components of the Plußsee food web (large bream) may be subsidised by carbon of methanogenic origin.

Letts, M.G. 1998. Modelling Peatland Soil Climate and Methane Flux using the Canadian Land Surface Scheme. M.Sc. thesis. McGill University. 86 p.

by Matthew G Letts

A soil climate parameterization is designed for peatland environments in the Canadian Land Surface Scheme (CLASS).... more A soil climate parameterization is designed for peatland environments in the Canadian Land Surface Scheme (CLASS). Three wetland soil classes account for the variation in the hydraulic characteristics of organic soils. Saturated hydraulic conductivity varies from a median of 1.0 x 10-7 m/s in deeply humidified sapric peat to 2.8 x 10-4 m/s in relatively undecomposed fibric peat. Average pore volume fraction ranges from 0.83 to 0.93. Parameters are derived for the soil moisture characteristic curves of fibric, hemic and sapric peat, using the Campbell (1974) equation employed in CLASS, and the van Genuchten (1980) formulation. Validation of modelled water table depth and peat temperature is performed for a fen in northern Quebec and a bog in north-central Minnesota. The new parameterization results in more realistic simulation than the previous version of CLASS, which was constrained to using mineral soil properties to approximate those of organic soils.
Two approaches are used to model methane emissions from northern peatlands using the new soil climate parameterization in CLASS. In the first module, the multiple regression equation of Dise et al. (1993) is used to simulate daily methane emissions from water table depth and peat temperature. In the process-based module, methane flux is divided into its component parts: plant transport, diffusion and ebullition. Each of these transport mechanisms is determined by methane concentrations, which are calculated from a series of processes related to peat temperature, water table level and rooting depth. The daily methane emissions predicted by the two models are similar and correlate reasonably with observations from a bog in north-central Minnesota.