Land use effects on erosion and carbon storage of the Río Chimbo watershed, Ecuador

Henry, Amelia; Mabit, Lionel; Jaramillo, Raúl E.; Cartagena, Yamil; Lynch, Jonathan P.

doi:10.1007/s11104-012-1478-y

Cited by 42 publications

(28 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The role of pine plantations in the land-use mosaic of the Chambo basin has been a dominating factor since the 1970s. The post-1960s land reforms and changes in economic policy [17,22,28,61,62] led to the establishment of tree plantations while simultaneously declaring native forests and other natural vegetation, such a páramo, vacant land [31]. Initially this led to significant land-use transitions from páramo and native forest to pine plantations and then, as economic and forestry policies evolved, led to plantations being converted to other uses.…”

Section: Post-1979 Drivers Of Land-use and Land-cover Change: Forestrmentioning

confidence: 99%

“…Between 1975 and 2001, the extent of pasture increased at the expense of páramo and there was considerable forest fragmentation in southern Ecuador [30]. 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].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Ross

Fildes

Millington

2017

Land

View full text Add to dashboard Cite

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.

show abstract

Section: Post-1979 Drivers Of Land-use and Land-cover Change: Forestrmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Ross

Fildes

Millington

2017

Land

View full text Add to dashboard Cite

show abstract

“…The phenotyping of RCS is not possible at the seedling stage, since it takes several weeks of plant growth for the phenotype and genetic differences to be visible. The identification of genetic markers controlling RCS would greatly facilitate their use in breeding programs (Lynch 2011;Henry et al 2012;York et al 2013). Advances in laser ablation tomography may enable the phenotyping of root anatomical traits on targeted root segments in a high-throughput manner (Chimungu et al 2014a;Saengwilai et al 2014;Chimungu et al 2014b).…”

Section: Research Prospectsmentioning

confidence: 99%

Functional implications of root cortical senescence for soil resource capture

Schneider

Lynch

2017

Plant Soil

View full text Add to dashboard Cite

Background Root phenes play a primary role in plant adaptation to edaphic stress. Understanding the functional implications of root phenotypes will enable the development of crop varieties with improved soil resource acquisition. Root cortical senescence (RCS) is a type of programmed cell death in cortical cells of several Poaceae species. Until recently there has been very little attention to the functional implications of RCS for water and nutrient capture. Scope We explore the functional implications of RCS as an adaptive trait for water and nutrient acquisition. The present review summarizes evidence from our own studies and other published work, and provides novel insights into the fitness landscape of RCS. Progress has recently been achieved in understanding the development and physiological implications of RCS. We propose that RCS is a useful trait for water and nutrient acquisition, particularly in edaphic stress conditions. Conclusions Further research is needed to understand the utility and tradeoffs of RCS in the context of specific environments, management practices, and phenotypic backgrounds. The utility of RCS for improved plant performance under edaphic stress merits investigation in the field. RCS may be a useful breeding target for improved soil resource capture in several major crop species including wheat, barley, and triticale.

show abstract

“…Soil erosion measurements based on fallout radionuclides for the Chimbo catchment (central Ecuadorian Andes) by Henry et al (2013) clearly illustrate that soil erosion rates highly depend on land cover and management: erosion rates in páramo grasslands are estimated at 9 t ha −1 yr −1 , and are significantly higher in forest plantations, pastures, and croplands with erosion rates of, respectively, 21, 24, and 150 t ha −1 yr −1 . The latter values are similar to soil erosion estimates for highly degraded Andean environments in southern Ecuador (Molina et al, 2008;Vanacker et al, 2014).…”

Section: Soil Hydrology Following Land Cover Conversionsmentioning

confidence: 99%

Multidecadal change in streamflow associated with anthropogenic disturbances in the tropical Andes

Molina

Vanacker

Brisson

et al. 2015

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. Andean headwater catchments are an important source of freshwater for downstream water users. However, few long-term studies exist on the relative importance of climate change and direct anthropogenic perturbations on flow regimes in these catchments. In this paper, we assess change in streamflow based on long time series of hydrometeorological data and land cover reconstructions in the Pangor catchment (282 km 2 ) located in the tropical Andes. Three main land cover change trajectories can be distinguished during the period 1963-2009: (1) expansion of agricultural land by an area equal to 14% of the catchment area (or 39 km 2 ) in 46 years' time, (2) deforestation of native forests by 11 % (or −31 km 2 ) corresponding to a mean rate of 67 ha yr −1 , and (3) afforestation with exotic species in recent years by about 5 % (or 15 km 2 ). Over the time period 1963-2009, about 50 % of the 64 km 2 of native forests was cleared and converted to agricultural land. Given the strong temporal variability of precipitation and streamflow data related to El Niño-Southern Oscillation, we use empirical mode decomposition techniques to detrend the time series. The long-term increasing trend in rainfall is remarkably different from the observed changes in streamflow, which exhibit a decreasing trend. Hence, observed changes in streamflow are not the result of long-term change in precipitation but very likely result from anthropogenic disturbances associated with land cover change.

show abstract

Land use effects on erosion and carbon storage of the Río Chimbo watershed, Ecuador

Cited by 42 publications

References 33 publications

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

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

Functional implications of root cortical senescence for soil resource capture

Multidecadal change in streamflow associated with anthropogenic disturbances in the tropical Andes

Contact Info

Product

Resources

About