Understanding the effect of three decades of land use change on soil quality and biomass productivity in a Mediterranean landscape in Chile

Hernández, Ángela; Arellano, Eduardo C.; Morales-Moraga, David; Miranda, Marcelo D.

doi:10.1016/j.catena.2016.01.029

Cited by 26 publications

(9 citation statements)

References 65 publications

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“…The main cause of these differences was due to the difference in the parent material forming the delta soils, the formation conditions and the formation time. However, it was reported that delta soils predominantly had a higher sand content than silt and clay content (Elbasiouny et al, 2014;Li et al, 2015;He et al, 2017), which is similar to our study results. Although sampling areas had the same topography and the same climatic conditions, differences in land management and formation times resulted in high coefficient of variation of the studied properties.…”

Section: Discussionsupporting

confidence: 92%

Factors of soil diversity in the Batumi delta (Georgia)

Turgut¹,

Ateş²

2017

Solid Earth

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Abstract. The aim of this study was to determine certain basic properties of soils in the Batumi delta (southwestern Georgia) to determine the relationships of studied properties and to identify differences with regards to these properties between different sampling sites in the delta that were selected based on the delta morphology. In this context, a total of 125 soil samples were collected from five different sampling sites, and the clay, silt and sand content of the samples were determined along with their mean weight diameter (MWD) values, aggregate stability (AS) values, amount of water retained under −33 (FC) and −1500 kPa (WP) pressure and organic matter (OM) content. Correlation analysis indicated that clay content and OM were positively correlated with MWD, and OM was positively correlated with AS. However, the sand content was found to be negatively correlated with MWD. In addition, clay, silt and OM content were positive correlated with FC and WP. Variance analysis results determined statistically significant differences between the sampling sites with respect to all of the evaluated properties. The active delta section of the study area was characterized by high sand content, while the lower delta plain was characterized by high OM and AS values, and the upper delta plain was characterized by high MWD values, high FC and WP moisture content levels and high clay and silt content. In conclusion, it was demonstrated that the examined properties were significantly affected by the different morphological positions and usages of these different areas. These results may help with the management of agricultural lands in the Batumi delta, which has never been studied before.

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Section: Discussionsupporting

confidence: 92%

Factors of soil diversity in the Batumi delta (Georgia)

Turgut¹,

Ateş²

2017

Solid Earth

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“…Land use change is regarded as one of the most important consequences of unprecedented human alterations of the earth's land surface [1]. These changes significantly impact ecosystems, climate, and human vulnerability, and are also related to land degradation, soil erosion, biodiversity loss, and environment pollution [2][3][4][5][6]. Land use change has been selected as a core research project of the International Geosphere Biosphere Programme (IGBP), the International Human Dimensions Programme on Global Environmental Change (IHDP), and the World Climate Research Programme (WCRP) [7].…”

Section: Introductionmentioning

confidence: 99%

Land Use Change in Coastal Cities during the Rapid Urbanization Period from 1990 to 2016: A Case Study in Ningbo City, China

et al. 2019

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Coastal cities have been experiencing tremendous land use changes worldwide. Studies on the consequences of land use change in coastal cities have provided helpful information for spatial regulations and have attracted increased attention. Changes in forests and water bodies, however, have rarely been investigated, challenging the formation of a holistic pattern of land use change. In this study, we selected Ningbo, China, as a case study area and analyzed its land use change from 1990 to 2016. Random forest (RF) classification was employed to derive land use information from Landsat images. Transition matrices and a distribution index (DI) were applied to identify the major types of land use transitions and their spatial variations by site-specific attributes. The results showed that the entire time period could be divided into two stages, based on the manifestations of land use change in Ningbo: 1990–2005 and 2005–2016. During 1990–2005, construction land expanded rapidly, mainly through the occupation of agricultural land and forest, while during 2005–2016, the main change trajectory turned out to be a small net change in construction land and a net increase in agricultural land sourced from construction land, forests, and water bodies. In terms of land use change by site-specific attributes, the rapid expansion of construction land around the municipal city center during 1990–2005 was restrained, and similar amounts of land conversion between construction and agricultural use occurred during 2005–2016. During the study period, areas undergoing land use change also showed trends of moving outward from the municipal city center and the county centers located adjacent to roads and the coastline and of moving up to hilly areas with steeper slopes and higher elevations. Protecting reclaimed agricultural land, improving the efficiency of construction land, and controlling forest conversion in hilly areas are suggested as spatial regulations in Ningbo city.

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“…A field survey and model simulations were also combined to reveal the statistical relationships between land use and vegetation growth [8]. Furthermore, although landscape pattern indices have been widely applied to calculate land use structure [9], a quantitative investigation on the effects of land use changes on vegetation activity by embedding landscape indices has not attracted sufficient attention [10].…”

Section: Introductionmentioning

confidence: 99%

Spatially Variable Relationships between Karst Landscape Pattern and Vegetation Activities

Hou

Gao

2020

Remote Sensing

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Based on the theories of structure–function correlation in Geography, and landscape pattern-ecological function correlation in Landscape Ecology, the correlation between land use fragmentation and vegetation activity was quantified. Effective mesh size (meff) was calculated to represent landscape fragmentation for land use, and the normalized difference vegetation index (NDVI) was used to reflect vegetation activity. The geographically weighted regression (GWR) model was applied to explore the spatial non-stationary relationship between meff and NDVI in a karst basin of the southwestern China, where environmental factors (i.e., climate, topography, and vegetation) are spatially heterogeneous. The spatial variation and scale dependence of landscape fragmentation and its relationship with vegetation activity, as well as the influence of lithology types and landforms relief, were considered. Firstly, the optimal ‘slide window’ size for landscape fragmentation was determined to be 500 m, and spatial pattern of meff displayed clear heterogeneity with a serious degree of fragmentation. Landscape fragmentation was more severe in carbonate areas than non-carbonate areas, reflecting the influence of landforms relief. More serious fragmentation in dolomite areas meant that the impact of human activities on the landscape morphological characteristics was much more significant than that in the limestone areas with steeper slope. Multi-scale analysis was used to verify a neighborhood size of 7 km for GWR in the study area. Negative effects on vegetation activity from landscape structural changes were more significant in limestone areas, which may be due to the more vulnerable ecosystems there. This research can provide scientific guidance for landscape management in karst regions as it considers the multi-scaled and spatially heterogeneous effects of lithology, geomorphology, and human factors on landscape structure and its correlation with vegetation activity.

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Understanding the effect of three decades of land use change on soil quality and biomass productivity in a Mediterranean landscape in Chile

Cited by 26 publications

References 65 publications

Factors of soil diversity in the Batumi delta (Georgia)

Factors of soil diversity in the Batumi delta (Georgia)

Land Use Change in Coastal Cities during the Rapid Urbanization Period from 1990 to 2016: A Case Study in Ningbo City, China

Spatially Variable Relationships between Karst Landscape Pattern and Vegetation Activities

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