Quantifying and understanding carbon storage and sequestration within the Eastern Arc mountains of Tanzania, a tropical biodiversity hotspot

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dc.contributor.authorWillcock, S.
dc.contributor.authorPhillips, O. L.
dc.contributor.authorPlatts, P. J.
dc.contributor.authorBalmford, A.
dc.contributor.authorBurgess, N. D.
dc.contributor.authorLovett, J .C.
dc.contributor.authorAhrends, A.
dc.contributor.authorBayliss, J.
dc.contributor.authorDoggart, N.
dc.contributor.authorDoody, K.
dc.contributor.authorFanning, E.
dc.contributor.authorGreen, J. M. H.
dc.contributor.authorHall, J.
dc.contributor.authorHowell, K. L.
dc.contributor.authorMarchant, R.
dc.contributor.authorMarshall, A. R.
dc.contributor.authorMbilinyi, B.
dc.contributor.authorMunishi, P. K .T.
dc.contributor.authorOwen, N.
dc.contributor.authorSwetnam, R. D.
dc.contributor.authorJorgensen, E. J. T.
dc.contributor.authorLewis, S. L.
dc.date.accessioned2018-06-18T15:14:49Z
dc.date.available2018-06-18T15:14:49Z
dc.date.issued2014
dc.descriptionCarbon Balance and Management, 2014.en_US
dc.description.abstractBackground: The carbon stored in vegetation varies across tropical landscapes due to a complex mix of climatic and edaphic variables, as well as direct human interventions such as deforestation and forest degradation. Mapping and monitoring this variation is essential if policy developments such as REDD+ (Reducing Emissions from Deforestation and Forest Degradation) are to be known to have succeeded or failed. Results: We produce a map of carbon storage across the watershed of the Tanzanian Eastern Arc Mountains (33.9 million ha) using 1,611 forest inventory plots, and correlations with associated climate, soil and disturbance data. As expected, tropical forest stores more carbon per hectare (182 Mg C ha-1) than woody savanna (51 Mg C ha-1). However, woody savanna is the largest aggregate carbon store, with 0.49 Pg C over 9.6 million ha. We estimate the whole landscape stores 1.3 Pg C, significantly higher than most previous estimates for the region. The 95% Confidence Interval for this method (0.9 to 3.2 Pg C) is larger than simpler look-up table methods (1.5 to 1.6 Pg C), suggesting simpler methods may underestimate uncertainty. Using a small number of inventory plots with two censuses (n = 43) to assess changes in carbon storage, and applying the same mapping procedures, we found that carbon storage in the tree-dominated ecosystems has decreased, though not significantly, at a mean rate of 1.47 Mg C ha-1 yr-1 (c. 2% of the stocks of carbon per year). Conclusions: The most influential variables on carbon storage in the region are anthropogenic, particularly historical logging, as noted by the largest coefficient of explanatory variable on the response variable. Of the non-anthropogenic factors, a negative correlation with air temperature and a positive correlation with water availability dominate, having smaller p-values than historical logging but also smaller influence. High carbon storage is typically found far from the commercial capital, in locations with a low monthly temperature range, without a strong dry season, and in areas that have not suffered from historical logging. The results imply that policy interventions could retain carbon stored in vegetation and likely successfully slow or reverse carbon emissions.en_US
dc.identifier.issn1750-0680
dc.identifier.urihttps://www.suaire.sua.ac.tz/handle/123456789/2394
dc.language.isoenen_US
dc.publisherCarbon Balance and Management.en_US
dc.subjectIPCC Tier 3en_US
dc.subjectEastern Arc Mountainsen_US
dc.subjectTanzaniaen_US
dc.subjectREDD+en_US
dc.subjectForesten_US
dc.subjectDisturbanceen_US
dc.subjectDegradationen_US
dc.subjectEcosystem serviceen_US
dc.titleQuantifying and understanding carbon storage and sequestration within the Eastern Arc mountains of Tanzania, a tropical biodiversity hotspoten_US
dc.typeArticleen_US
dc.urlhttps://doi.org/10.1186/1750-0680-9-2en_US

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