Contribution of agroforests to landscape carbon storage

Schroth, Götz; Bedê, Lúcio Cadaval; Paiva, Artur Orelli; Cassano, Camila Righetto; Amorim, André M.; Faria, Deborah; Mariano‐Neto, Eduardo; Martini, Adriana Maria Zanforlin; Sambuichi, Regina Helena Rosa; Lôbo, Renato N.

doi:10.1007/s11027-013-9530-7

Cited by 47 publications

(34 citation statements)

References 24 publications

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“…Our study demonstrated a similar comparison between CAF and fallow systems for C sequestration potentials. Moreover, the benefits of using CAF systems as climate-smart production strategies have been reported in other recent publications (Georges et al 2012;Saj et al 2013;Schroth et al 2013). Both crop yields and C sequestration have the potential to be increased through better design and management (Magne et al 2014;Somarriba et al 2013).…”

Section: Growth Accumulation Rate Of C Stocksmentioning

confidence: 79%

“…In the Centre Region of Cameroon, the CAF system is the most important source of cash income for more than 70 % of farmers (Sunderlin et al 2000). Contributing significantly to local well-being, CAF systems are also being promoted for their ability to provide climate change mitigation services, specifically with regard to C sequestration (Georges et al 2012;Guo and Zhou 2007;Hergoualc'h et al 2012;Jose 2009;Kumar and Nair 2011;Mbow et al 2014;Minang et al 2014;Saj et al 2013;Schroth et al 2013;Silatsa et al 2015;Thangata and Hildebrand 2012) Within this context of climate change mitigation, the question remains whether these two systems (CAF and fallows) are comparable in their capability to sequester new C. Total (tree and soil) C stocks of CAF and fallow systems have been quantified in several studies (Kotto-Same et al 1997;Njomgang et al 2011;Saj et al 2013;Silatsa et al 2015). These studies tended to focus on C stock estimates rather than on long-term C change over time.…”

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confidence: 99%

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Modeling carbon stock dynamics under fallow and cocoa agroforest systems in the shifting agricultural landscape of Central Cameroon

et al. 2016

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With increasing concerns raised by climate change, understanding biological processes within cocoa (Theobroma cacao L.) agroforest (CAF) and fallow systems is a prerequisite for developing actions related to emission reduction in the shifting agricultural landscape of Cameroon. Carbon (C) stocks and accretion were assessed and modeled in various C components (large trees, small trees, dead wood, litter, roots, soil, and total C) of fallow and CAF systems along a 50-year chronosequence. Several functions were empirically fitted to a time series of C stocks. Large tree, soil, and total C stocks were best described by a logistic growth function while that for small trees by a rational quadratic function. The best-fitted functions explained 72-96 % of C stock accumulation over time. Two metrics describing C stock accretion were derived from these functions: the point of maximum C growth and the C growth coefficient (GC). The rate of maximum growth of total C stock was reached after 12-13 years in both fallow and CAF, with maximum GCs of 6.9 and 6.3 Mg C ha -1 year -1 , respectively. Over the 50-year period, the GCs of total C stocks varied between 0.2 and 6.9 Mg C ha -1 year -1 , with quick accumulation within the first decade that then slowed until it levelled off after 45 years. Over a period of about 30 years, both systems sequestered a total of *200 Mg C ha -1 . This indicates that cocoa agroforests, a main source of income for local populations, can also provide significant climate change mitigation services.

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Section: Growth Accumulation Rate Of C Stocksmentioning

confidence: 79%

mentioning

confidence: 99%

Modeling carbon stock dynamics under fallow and cocoa agroforest systems in the shifting agricultural landscape of Central Cameroon

et al. 2016

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“…Our samples were carried out in nine cacao agroforests, with shade tree density ranging from 40 up to 300 trees/ha with diameter at breast height (DBH) >10 cm. These values represent extremes of cacao plantations intensely managed (low tree density) and highly shaded (high tree density; Schroth et al, ). The value of 40 native trees/ha corresponds to the minimum authorized in the Bahia State law that regulates native tree logging in traditional cacao agroforests (Bahia, ).…”

Section: Methodsmentioning

confidence: 99%

“…Management intensification in cacao and coffee agroforests mainly occurs by (a) reducing native tree density for greater insolation and increasing crop density; (b) replacement of native by exotic trees; (c) more frequent mechanical removal of the herbaceous stratum or use of herbicide; and (d) more frequent use of pesticides and fertilizers (Clough et al, ; Perfecto & Vandermeer, ; Schroth et al, ). In addition, increased presence of humans in agroforests, in both frequency and abundance, due to intensification may result in a higher rate of encounter with native species, possibly leading to additional disturbance through hunting or predation by introduced carnivores (Frigeri, Cassano & Pardini, ; Santos et al, ).…”

Section: Introductionmentioning

confidence: 99%

Is shadier better? The effect of agroforestry management on small mammal diversity

et al. 2020

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Agroforestry systems play fundamental roles for wildlife conservation, but are prone to disturbances from management practices aiming at increasing local productivity.This work investigates the small mammal assemblages present in cacao agroforests, which differ in shade tree density. We tested the prediction that higher tree density increases shade level, analyzed how some environmental variables important for small mammals (vegetation complexity, tree basal area, and invertebrate biomass) vary across the shade level gradient, and how the assemblages respond to these variations. We also tested the effect of the environmental variables on the abundance of the three most common species: Rhipidomys mastacalis, Hylaeamys seuanezi, and Marmosa murina. We captured 651 individuals belonging to 18 species. A positive relationship was observed between an abundance of non-forest specialists and tree basal area, while species diversity within this group showed positive association with vegetation complexity. Assemblage structure (described by a matrix of species abundance per site) was not affected by our environmental variables, but R. mastacalis was more abundant in sites with lower vegetation complexity. Higher shade levels in cacao agroforest tended to occur in sites with greater tree basal area, which was not a good predictor of small mammal diversity. This suggests that environmental management to reduce shade with the purpose of increasing cacao productivity is not necessarily negative for small mammal conservation. Species diversity was favored by structurally complex systems, a possible response to greater niche diversity.Abstract in Portuguese is available with online material. K E Y W O R D Sagroforestry system, Atlantic forest, Brazil, community ecology, Didelphimorphia, Mammalia, Rodentia

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“…Therefore, factors such as crop management, some species are being incorporated, as well as the OW characteristics, affect the SOC storage capacity (Jandl et al, 2007). According to Schroth et al (2015), CAS can accumulate a significant amount of tree biomass (which means: storage of soil organic carbon in high amounts, sometimes even higher than some natural forests).…”

Section: Introductionmentioning

confidence: 99%

Evolution of soil organic carbon during a chronosequence of transformation from cacao (Theobroma cacao l.) plantation to grassland

Luque

Hernandez²,

Gómez³

et al. 2017

Acta Agron.

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The aim of this research was to evaluate the impact of the soil use change of the Cocoa Agroforestry System (CAS) on soil organic carbon (SOC) levels and other indicating soil chemical fertility properties (edaphic density ρ b , cation exchange capacity CEC, soil total nitrogen STN), when a soil use change occurs from CAS to grassland (GL). For this, in order to be selected was recorded, considering different time intervals (1-5, 6-10 y 11-20 years). However, a CAS of 20-35 years was considered as a reference. In addition, soil samples were taken at -30 cm depth to determine the contents of SOC, STN, CEC, ρb, soil organic matter (SOM) and the soil C/N ratio. Consequently, the soil penetration resistance was evaluated in situ. The results indicated the change in soil use from CAS to GL, did not cause a significant decrease in the amount of stored SOC (0-30 cm) during the considered time with respect to CAS. However, if only the first -10 cm of soil is sampled, a significant soil compaction is observed throughout a decrease in the CEC value in the long term (20 years).Key words: Soil use change, edaphic apparent density, soil fertility, soil organic matter, edaphic C/N relationship. ResumenEl objetivo de esta investigación fue evaluar el impacto del cambio de uso de suelo del Sistema Agroforestal de Cacao (SAFC) sobre los niveles de Carbono Orgánico del Suelo (COS) y otras propiedades indicadoras de la fertilidad edáfica (densidad aparente ρ b , capacidad de intercambio catiónico CIC, N total del suelo NTS), cuando se produce un cambio de uso de suelo de SAFC a pastizal (PZ). Para ello, se seleccionaron sitios donde se registró este cambio de uso del suelo, considerando diferentes intervalos de tiempo (1-5, 6-10 y 11-20 años). Como referencia se consideró un SAFC de 20-35 años. Adicionalmente, se tomaron muestras de suelo a -30 cm de profundidad para determinar los contenidos de COS, NTS, CIC, ρ b , materia orgánica del suelo (MOS) y la relación C/N edáfica. Consecuentemente, se evaluó la resistencia a la penetración del suelo in situ. Los resultados indicaron que el cambio de uso de suelo SAFC a PZ, no ocasionó una disminución significativa de la cantidad de COS almacenado (0-30 cm) durante el tiempo considerado respecto al SAFC. Sin embargo, si sólo se muestrean los -10 cm primeros del suelo, se observa una significativa compactación edáfica, junto con una caída del valor de la CIC a largo plazo (20 años).Palabras clave: Cambio de uso de suelo, densidad aparente edáfica, fertilidad del suelo, materia orgánica del suelo, relación C/N edáfica.

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Contribution of agroforests to landscape carbon storage

Cited by 47 publications

References 24 publications

Modeling carbon stock dynamics under fallow and cocoa agroforest systems in the shifting agricultural landscape of Central Cameroon

Modeling carbon stock dynamics under fallow and cocoa agroforest systems in the shifting agricultural landscape of Central Cameroon

Is shadier better? The effect of agroforestry management on small mammal diversity

Evolution of soil organic carbon during a chronosequence of transformation from cacao (Theobroma cacao l.) plantation to grassland

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