Mapping soil organic carbon on a national scale: Towards an improved and updated map of Madagascar

Ramifehiarivo, Nandrianina; Brossard, Michel; Grinand, Clovis; Andriamananjara, Andry; Razafimbelo, Tantely; Rasolohery, Andriambolantsoa; Razafimahatratra, Hery; Seyler, Frédérique; Ranaivoson, Ntsoa; Rabenarivo, Michel; Albrecht, Alain; Razafindrabe, Franck; Razakamanarivo, Herintsitohaina

doi:10.1016/j.geodrs.2016.12.002

Cited by 57 publications

(37 citation statements)

References 42 publications

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“…There are no systematic differences in the soil type within the study area. Most of it is covered with ferralitic soils (Delenne & Pelletier, ; Ramifehiarivo et al, ).…”

Section: Methodsmentioning

confidence: 99%

Unexpectedly diverse forest dung beetle communities in degraded rain forest landscapes in Madagascar

2020

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Tropical forests, which harbor high levels of biodiversity, are being lost at an alarming speed. Madagascar, a biodiversity hotspot, has lost more than half of its original forest cover. Most of the remaining forests are small fragments of primary and secondary forest with differing degrees of human impact. These forests, as well as coffee and fruit plantations, may be important in supporting the forest‐dependent biodiversity in Madagascar but this has been little studied. In Madagascar, dung beetles, which offer important ecosystem services, are largely restricted to forests. We examined the ability of fragmented and degraded forests to support dung beetle diversity, compared to the large areas of primary forest in eastern Madagascar. We found a general trend of a reduction of species with a loss of forest connectivity. In contrast, a higher level of forest disturbance was associated with higher species diversity. In several sites of low‐quality forest as many or more species were found as in less disturbed and primary forests. The average size of dung beetles was smaller in the lower quality localities than in the primary forests. These findings suggest that many forest dung beetles in Madagascar are better adapted to forest disturbance than earlier expected, although they require some level of connectivity to surrounding forest. Abstract in Malagasy is available with online material.

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“…There are no systematic differences in the soil type within the study area. Most of it is covered with ferralitic soils (Delenne & Pelletier, ; Ramifehiarivo et al, ).…”

Section: Methodsmentioning

confidence: 99%

Unexpectedly diverse forest dung beetle communities in degraded rain forest landscapes in Madagascar

2020

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“…Soil organic carbon maintains soil health and productivity of plant resources [5]. At least there are two advantages of the existence of soil organic matter in the soil that are: increasing the water absorbance and the soil aggregate stability.…”

Section: Soil Organic Contentmentioning

confidence: 99%

Soil chemical and physical characteristics as a base for achieving sustainable forest land use in RPH Watugudel, KPH Ngawi, Jawa Timur

Kusumandari

Kusumawardani

Subroto

et al. 2018

Digital Press Life Sciences

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This study area was used to be covered by teak forest. However, because of the human influences, the land use was changed to rice field, shrubs, dry field, settlement and remaining teak forest. The aimed of this research is to study the soil chemical and physical characteristics as a base in improving its quality. The soil samples were taken from the field at 5 land use types with 4 repetitions. Then, they were analyzed in the laboratory. This research resulted that all areas have the soil acidity of more than 8 and the soil organic content of 2.72 % to 3.69 %, whereas the Nitrogen content varies from 0.2 % to 0.29 %. Furthermore, the Phosphorus content varies from 4.61 mg · L -1 to 21.07 mg ⋅ L -1 . The available potassium ranges from 0.78 cmol ⋅ kg -1 to 1.99 cmol ⋅ kg -1 . The soil physical characteristics of the study area showed that the bulk density varies around 1 Mg ⋅ m -3 and the particle density of 2.13 Mg ⋅ m -3 to 2.27 Mg ⋅ m -3 . The porosity also varies from 46.30 % to 60.80 %, whereas the soil permeability ranges widely from 1.4 cm ⋅ h -1 to 25.9 cm ⋅ h -1 . In conclusion, the study area has the high soil acidity, relatively high soil organic matter content, low nitrogen, phosphor and potassium, good porosity and relatively bad permeability. To achieve sustainable forest land use, the use of fertilizer is required, also the implementation of soil tillage is recommended to improve the soil physical characteristics.

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“…However, there is still a need for standard guidance documents to estimate stocks at various spatial scales (Stolbovoy et al, 2007;Morvan et al, 2008;Saby et al, 2008;Schrumpf et al, 2011;The Earth Partners LLC, 2012;Chappell et al, 2013;de Gruijter et al, 2016;Miller et al, 2016;Maillard et al, 2017). Rapid, accurate and cost effective procedures (e.g., remote sensing, infrared spectroscopic measurements in the field) are needed to enable frequent monitoring of SOC data on a large scale (Vaudour et al, 2013;Gras et al, 2014;Cambou et al, 2016;Lobsey and Viscarra Rossel, 2016;Ramifehiarivo et al, 2017). Moreover, from a climate change point of view it is also important to provide standard guidance on the detection of SOC stock changes, as these changes can either have a negative (emissions) or beneficial effect on climate change (mitigation).…”

Section: Needed Standards According To Policy Requirementsmentioning

confidence: 99%

Accounting for Carbon Stocks in Soils and Measuring GHGs Emission Fluxes from Soils: Do We Have the Necessary Standards?

Bispo

Andersen

Angers

et al. 2017

Front. Environ. Sci.

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Soil is a key compartment for climate regulation as a source of greenhouse gases (GHGs) emissions and as a sink of carbon. Thus, soil carbon sequestration strategies should be considered alongside reduction strategies for other greenhouse gas emissions. Taking this into account, several international and European policies on climate change are now acknowledging the importance of soils, which means that proper, comparable and reliable information is needed to report on carbon stocks and GHGs emissions from soil. It also implies a need for consensus on the adoption and verification of mitigation options that soil can provide. Where consensus is a key aspect, formal standards and guidelines come into play. This paper describes the existing ISO soil quality standards that can be used in this context, and calls for new ones to be developed through (international) collaboration. Available standards cover the relevant basic soil parameters including carbon and nitrogen content but do not yet consider the dynamics of those elements. Such methods have to be developed together with guidelines consistent with the scale to be investigated and the specific use of the collected data. We argue that this standardization strategy will improve the reliability of the reporting procedures and results of the different climate models that rely on soil quality data.

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Mapping soil organic carbon on a national scale: Towards an improved and updated map of Madagascar

Cited by 57 publications

References 42 publications

Unexpectedly diverse forest dung beetle communities in degraded rain forest landscapes in Madagascar

Unexpectedly diverse forest dung beetle communities in degraded rain forest landscapes in Madagascar

Soil chemical and physical characteristics as a base for achieving sustainable forest land use in RPH Watugudel, KPH Ngawi, Jawa Timur

Accounting for Carbon Stocks in Soils and Measuring GHGs Emission Fluxes from Soils: Do We Have the Necessary Standards?

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