Influence of land use on hydro-physical soil properties of Andean páramos and its effect on streamflow buffering
Influence of land use on hydro-physical soil properties of Andean páramos and its effect on streamflow buffering
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土地利用对安第斯帕拉莫斯水物理土壤性质的影响及其对径流缓冲的影响
DOI：
10.1016/j.catena.2021.105227
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发表时间：
2021
期刊：
影响因子：
6.2
通讯作者：
Patiño S
中科院分区：
文献类型：
--
作者：
Patiño S
北安第斯山脉的Thepáramosbiome是一个高山热带草原湿地生态系统的集合，提供重要的生态系统服务，包括水文缓冲和供水。这些生态系统中的人类活动改变了植被覆盖和土壤水物理性质，影响了其水文性能以及水质和水量。本文系统回顾了土地利用（农业、畜牧业和造林）对páramo土壤水物理性质的影响，并分析了其对河流缓冲的影响。我们的审查方案确定了32篇相关论文，从中可以获得与水流变异性相关的关键水物理特性：土壤有机质（SOM）、土壤有机碳（SOC）、孔隙度、容重、饱和水力电导率和保水能力（WRC）。分析表明，具有天然覆盖层的土壤具有多孔结构，具有较高的WRC和SOM含量。农业增加了宏观孔隙度，但它导致光秃秃的休耕地块，促进养分和土壤有机质的流失。燃烧产生疏水聚集体，影响WRC。牲畜放牧造成土壤压实，增加容重，减少入渗和WRC。外来树种造林（如松树、桉树）通过改变土壤结构降低土壤有机质和水资源储量。总体而言，分析的土地利用活动产生疏水聚集体，增加容重，促进侵蚀和径流，损害水文缓冲能力。这种来自多种经验研究的综合证据可用于有效地交流不同土地利用做法对páramo土壤的影响，为数据稀缺情况下的建模提供信息，并有助于土地利用规划和保护的决策过程。
Thepáramosbiome of the northern Andes is a collection of high-mountain tropical grassland wetland ecosystems that provides important ecosystem services including hydrological buffering and water supply. Human activities in these ecosystems transform vegetation cover and soil hydro-physical properties, affecting their hydrological performance and water quality and quantity. Here, we conducted a systematic review on the influence of land use (agriculture, livestock grazing, and afforestation) on the hydro-physical properties of páramo soils and analyzed its implications for streamflow buffering. Our review protocol identified 32 relevant papers, from which key hydro-physical properties linked to streamflow variability were available: soil organic matter (SOM), soil organic carbon (SOC), porosity, bulk density, saturated hydraulic conductivity, and water retention capacity (WRC). The analysis shows that soils with native cover are characterized by a porous structure that allows a high WRC and SOM content. Agriculture increases macroporosity but it leads to bare fallow plots that promote loss of nutrients and SOM. Burning generates hydrophobic aggregates that affect WRC. Livestock grazing produces soil compaction and increases bulk density, reducing infiltration and WRC. Lastly, afforestation with exotic species (e.g. pines, eucalyptus) decreases SOM and WRC by changing soil structure. In general, the analyzed land-use activities generate hydrophobic aggregates, increase bulk density, promote erosion and runoff, and impair hydrological buffering capacity. This integrated evidence from multiple empirical studies can be used to effectively communicate the effects of different land use practices on páramo soils, provide information for modelling in data-scarce situations, and contribute to decision making processes for land use planning and conservation.
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DOI：
--
发表时间：
2015
期刊：
影响因子：
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作者：
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