Changes in carbon storage under alternative land uses in biodiverse Andean grasslands: implications for payment for ecosystem services

Farley, Kathleen A.; Bremer, Leah L.; Harden, Carol P.; Hartsig, James

doi:10.1111/j.1755-263x.2012.00267.x

Cited by 70 publications

(70 citation statements)

References 31 publications

(82 reference statements)

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“…This agricultural NAMA for the Andes will be oriented to protect the SOC stocks affected by land-use change from natural grasslands into exploitative maca fields. Soil carbon sequestration may be as or even more effective than aboveground carbon sequestration, and provides an opportunity for grassland conservation or restoration plans amenable to payment for ES and climate change mitigation schemes (Farley et al, 2013).…”

Section: Climate Change Mitigation Schemes and Payment For Ecosystem mentioning

confidence: 99%

Key ecosystem services and ecological intensification of agriculture in the tropical high-Andean Puna as affected by land-use and climate changes

Rolando

Turin

Ramírez

et al. 2017

Agriculture, Ecosystems & Environment

106

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Section: Climate Change Mitigation Schemes and Payment For Ecosystem mentioning

confidence: 99%

Key ecosystem services and ecological intensification of agriculture in the tropical high-Andean Puna as affected by land-use and climate changes

Rolando

Turin

Ramírez

et al. 2017

Agriculture, Ecosystems & Environment

106

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“…These dramatic changes in native vegetation in the high Andes in the late 20th and early 21st Centuries have been attributed to changes in land-use practices after the 1954 land reform [31]. These changes have increased soil erosion rates and negatively impacted on the hydrological and carbon cycles [8,9,14,[31][32][33][34][35][36][37][38][39]. It has been argued that land-use policies, deforestation, urbanization, and the movement of people are the root causes of degradation in this ecoregion [40].…”

Section: Introductionmentioning

confidence: 99%

Land‐Use and Land‐Cover Change in the Páramo of South‐Central Ecuador, 1979–2014

Ross

Fildes

Millington

2017

Land

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Land use and land cover were mapped between 3500 and 5000 meters above sea level m.a.s.l. in the Río Chambo basin in south-central Ecuador from Landsat MSS, TM, ETM and OLI imagery acquired between 1979 and 2014. The area mapped has been dominated by páramo and a variety of agricultural land uses since 1979. The main land-use transitions have been from páramo to agriculture, native forest to páramo and agriculture, and agriculture back to páramo. Significant areas of páramo have remained unchanged over the 35-year period analyzed, while the area of native forest has declined and that of bare soil increased. Plantations of non-native timber species increased from 1979 to 1999, but their area has now declined. Most land-use transformations have occurred at lower elevations in the 3500-5000 m.a.s.l. range. This is particularly the case for the loss of native forest and the degradation of páramo and agriculture to areas of bare (eroded) soils. A drivers-based approach revealed that these land-use transformations were related to import substitution and afforestation policies geared toward internal markets, exports and environmental conservation.

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“…For example, in the Qinghai-Tibet Plateau grasslands and páramo grasslands of the Colombian, Ecuadorian and Peruvian Andes, total SOC stocks can range between 80 and 250 Mg C ha −1 (Hofstede, 1995;Zimmermann et al, 2010;Farley et al, 2012;Li et al, 2013;Muñoz et al, 2013;Oliveras et al, 2014b).…”

Section: Belowground C Stocksmentioning

confidence: 99%

The effects of burning and grazing on soil carbon dynamics in managed Peruvian tropical montane grasslands

et al. 2017

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Abstract. Montane tropical soils are a large carbon (C) reservoir, acting as both a source and a sink of CO 2 . Enhanced CO 2 emissions originate, in large part, from the decomposition and losses of soil organic matter (SOM) following anthropogenic disturbances. Therefore, quantitative knowledge of the stabilization and decomposition of SOM is necessary in order to understand, assess and predict the impact of land management in the tropics. In particular, labile SOM is an early and sensitive indicator of how SOM responds to changes in land use and management practices, which could have major implications for long-term carbon storage and rising atmospheric CO 2 concentrations. The aim of this study was to investigate the impacts of grazing and fire history on soil C dynamics in the Peruvian montane grasslands, an understudied ecosystem, which covers approximately a quarter of the land area in Peru. A density fractionation method was used to quantify the labile and stable organic matter pools, along with soil CO 2 flux and decomposition measurements. Grazing and burning together significantly increased soil CO 2 fluxes and decomposition rates and reduced temperature as a driver. Although there was no significant effect of land use on total soil C stocks, the combination of burning and grazing decreased the proportion of C in the free light fraction (LF), especially at the lower depths (10-20 and 20-30 cm). In the control soils, 20 % of the material recovered was in the free LF, which contained 30 % of the soil C content. In comparison, the burnt-grazed soil had the smallest recovery of the free LF (10 %) and a significantly lower C content (14 %). The burnt soils had a much higher proportion of C in the occluded LF (12 %) compared to the not-burnt soils (7 %) and there was no significant difference among the treatments in the heavy fraction (F) (∼ 70 %). The synergistic effect of burning and grazing caused changes to the soil C dynamics. CO 2 fluxes were increased and the dominant temperature driver was obscured by some other process, such as changes in plant C and N allocation. In addition, the free LF was reduced when these two anthropogenic activities took place on the same site -most likely a result of reduced detritus being incorporated into the soil. A positive finding from this study is that the total soil C stocks were not significantly affected and the long-term (+10 years) C storage in the occluded LF and heavy F were not negatively impacted. Possibly this is because of low-intensity fire, fire-resilient grasses and because the grazing pressure is below the threshold necessary to cause severe degradation.

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Changes in carbon storage under alternative land uses in biodiverse Andean grasslands: implications for payment for ecosystem services

Cited by 70 publications

References 31 publications

Key ecosystem services and ecological intensification of agriculture in the tropical high-Andean Puna as affected by land-use and climate changes

Key ecosystem services and ecological intensification of agriculture in the tropical high-Andean Puna as affected by land-use and climate changes

Land‐Use and Land‐Cover Change in the Páramo of South‐Central Ecuador, 1979–2014

The effects of burning and grazing on soil carbon dynamics in managed Peruvian tropical montane grasslands

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