Table 1 Databases searched and search strategy developed for each database

US Department of Agriculture Forest Service Treesearch http://www.treesearch.fs.fed.us/

Google search for: carbon OR biomass OR decomposition OR respiration OR "woody debris".

Australian Government Department of Climate Change website http://www.climatechange.gov.au/index.

html

Full-text articles in the "Agriculture", "Biodiversity", "Forestry","International","Land use" and "Science" sections to be uploaded and hand-searched.

EDIS (Electronic Data Information Source) http://edis.ifas.ufl.edu/

Advanced search option for "any of the words": carbon orbiomass; and"none of the words": monoxide, poultry, fish, drinking, gardener.

Forests in flux http://www.unep-wcmc.org/forest/flux/index.htm; http://www.citeulike.org/user/ForestsInFlux

The full library of full-text articles will be uploaded to Endnote and searched there.

NRCAN Library Catalogue http://catalogue.nrcan.gc.ca

Keyword combinations of: "carbon store"; "carbon stock"; "carbon pool";"carbon biomass"; "carbon sequestration"; "allometric"; "allometry"; "biomass estimation"; "biomass determination"; "woody debris".

World Environment Library http://www.nzdl.org/fast-cgi-bin/library?a=p&p=about&c=envl

Boolean searches using words in title: carbon, biomass, decomposition, respiration,allometric, allometry, "woody debris”.

CGVlibrary http://vlibrary.cgiar.org

Advanced search option for "Any word = (carbonOR biomass OR decomposition OR respiration OR woody debris) And Any word =(measure Or measurement Or method Or estimate Or calculation Or equation Or inventory Or survey)"

UN-REDD Web Platform http://unfccc.int/methods_science/redd/items/

4531.php

Search the title/abstract in advanced search using "carbon OR biomass".

FAO Online Catalogues http://www4.fao.org/faobib

Advanced search option in whole record for: measure,measurement,method, estimate, estimation, calculation,calculate, assessment, survey, inventory, technique, allometric, sequest, stock, store, flux, sink; and in the title: carbon, biomass, decomposition, respiration, debris.

CIFOR Publications http://www.cifor.cgiar.org/Publications

Search the publications section in the advanced search option, 'subject search', with the search string: "carbon OR biomass OR decomposition OR respiration OR woody debris"

ISRIC http://www.isric.org/

Access via the 'staff publications' section and upload full-text after hand-searching

UNEP Publications http://www.unep.org/publications

Search with single terms: carbon, biomass, debris, decomposition, respiration, climate

World Agroforestry Centre Publications http://www.worldagroforestry.org

Search publication using single terms: carbon, biomass, woody debris, decomposition, respiration

Columbia Earth Institute – International Research Institute for Climate and Society -http://portal.iri.columbia.edu/portal/server.pt

Upload full-text for assessment

European Space Agency Earth Observation Projects Department –http://www.esa.int

Upload list of publications in the Monographs, Conference proceedings and Reports and Memoranda accessed via the product databasein the publications section.

Tropical Soil Biology and Fertility Institute ofCIAT (TSBF-CIAT): Conservation and Sustainable Management of _k;Below-_k;_Ground_k; Biomass project http://www.bgbd.net

Upload full publications list

Global Forest Resources Assessment (FRA) 2005 of FAO and its country reports http://www.fao.org/forestry/fr

Search (without the use of search keywords orsearch box) for the main FRA 2005 report and all country reports in the FRA 2005 section of the main website: http://www.fao.org/forestry/fra/fra2005/en/

National Forest Monitoring and Assessment(NFMA) of FAO and its reports http://www.fao.org/forestry/nfms/en/

Browse publications and Country via the Country Projects Pages, for those countries withcompleted projects.

ISI Web of Knowledge (including Web of Knowledge with Conference Proceedings, BIOSIS Previews http://apps.isiknowledge.com

See Appendix A

Scirus

Search in the advanced search option for “All the words = (carbon method* measure*)” in the"complete document", and “Any word = (stock* store* pool* flux* sink* balance* budget* sequest*)” in the "article title". Subject areas restricted to agricultural and biological sciences and environmental sciences.

Google Scholar

Search in the advanced search option for "All the words = (carbon methodmeasure) And Any of the words = (stock store pool flux sink balancebudget)". File type restricted to the subject areas: Biology, Life Sciences,and Environmental Science; Engineering, Computer Science, andMathematics; and Physics, Astronomy, and Planetary Science

Science Direct

See Appendix A

Georef

FIND ("Title"/"Index Terms"/"Abstract"/"Author Affil"/"Source"/"Notes"/"Publication Type"/"Record ID" ct (carbon flux*/carbon stock*/carbonpool*/carbon stor*/carbon sink*/carbon sequest*/carbon biomass/carbon source*/carbon balance*/carbon budget*) & (peat*/wetland*/forest*/wood*/tree*/soil*/crop*/grass*/pasture*/meadow*/harvest*/agricultur*/land/timber/terrestrial) & (method*/approach*/technique*/model*/equation*/satellite*/remote sens*/estimat*/calculat*/assess*/predict*/tool*/measure*/simulat*/monitor*/function*))

Scopus

See Appendix A

Agricola

See Appendix A

CAB Abstracts

See Appendix A

ATROFI-UK; Archive of Tropical Forestry Inventory http://www.rdg.ac.uk/ssc/atrofi/

Search directly for articles documenting inventory methods.