Mapping Human Impact on Net Primary Productivity Using MODIS Data for Better Policy Making

Razali, Sheriza Mohd; Atucha, Arnaldo Aitor Marín; Nuruddin, Ahmad Ainuddin; Shafri, Helmi Zulhaidi Mohd; Hamid, Hazandy Abdul

doi:10.1007/s12061-015-9156-0

Cited by 6 publications

(4 citation statements)

References 64 publications

(95 reference statements)

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“…The NPP model, which incorporated fAPAR, APAR, PAR and NDVI from satellite data, produced favourable outcomes for the NPP. In this study, the NPP evaluated for the plantation is 650 gCm -2 month -1 , higher than recorded by Razali et al (2015) in the tropical forest in Pasoh Forest Reserve in West Malaysia of 202.2 to 213.5 gCm -2 month -1 . The present model that utilizes NDVI data derived from WorldView-2 will be particularly valuable if applied to temporal NDVI data to assess the monthly NDVI for the study area.…”

Section: Npp Distributioncontrasting

confidence: 62%

Monitoring green biomass utilizing remote sensing techniques for agriculture and forest areas in East Malaysia

Razali

Samdin

Lion

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Forests and agricultural plantations are vegetated areas that play an important role in catering to human needs. The characteristics of the two lands can be recognized by utilizing remote sensing techniques of WorldView-2 satellite images as green biomass monitoring tools. The research was undertaken in Sabah Softwoods Berhad (SSB) forest plantation, East Malaysia, to analyze land use in the high functionality areas. Aside from the social benefits, there has been a lack of research conducted to estimate the areas’ Net Primary Productivity (NPP) using remote sensing of biophysical characteristics. The NPP quantifies the biomass generated by the green plants, which provides the chemical energy that drives most of the biotic processes on the Earth. The NPP calculated from the study for all land features in the study areas ranged from 39.33 gCm−2 month−1 to 1498.00 gCm-2 month-1. This work has established a new NPP assessment for all land features in the Brumas forest plantation in East Malaysia. Because NPP is an estimate of the earth’s living biomass, this type of approach should be used to develop biomass maps to meet human requirements on the planet.

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Section: Npp Distributioncontrasting

confidence: 62%

Monitoring green biomass utilizing remote sensing techniques for agriculture and forest areas in East Malaysia

Razali

Samdin

Lion

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…There are several methods to quantitatively calculate the impact of human activities on NPP. Different land cover types (Saikku et al, 2015) or the human activity index can be used to calculate the sum of land use changes to obtain the anthropogenic effects on the NPP (Razali et al, 2015). The dynamic vegetation model has been used to evaluate the influence of human activities on the parameters of vegetation growth, which could then be used to quantify the effects (Ren et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Human activities rather than climate dominated the grassland net primary production in the three basins of the Hexi Corridor, North‐Western China

Wang¹,

Dou

2023

River

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Actual net primary production (ANPP) is affected by both natural conditions and human activities in many areas, while the contributions of these factors to NPP remain unknown because it is difficult to isolate their effects. This knowledge gap hinders our implementation of environmental protection and restoration. In this study, we selected three basins of the Hexi Corridor, North‐western China, as the study area. Based on the monthly growth of grassland and field observations, we identified the undisturbed grids and then calculated the potential net primary productivity (PNPP) of these grids. Using the Carnegie‐Ames‐Stanford‐Approach (CASA) model, we calculated the ANPP in these areas. The influence of human activities on NPP (HNPP) was then calculated as the difference between ANPP and PNPP. The results showed that from 2001 to 2017, the mean grassland HNPP was −236.25 gC m−2 a−1. The area with a relative contribution index (RCI) of human activity greater than 0.5 accounted for more than 50% of the total, indicating that human activities were a dominant factor in the NPP change. After the implementation of ecological governance projects in the Hexi Corridor in 2006, HNPP exhibited a negative weakening rate of 2.79 gC m−2 a−1 (p < 0.05), and the RCI decreased from 0.708 at the beginning of the study period to 0.522 at the end (p < 0.01), indicating that reducing human interference with nature was an effective measure for ecological restoration. Based on these findings, we concluded that the changes in NPP in the three basins of the Hexi Corridor was dominated by human activities. Our results suggest that future studies pertaining to the response of NPP to climate change should consider the impact of human activities in semi‐arid regions.

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“…The terrestrial NPP is directly relevant to humankind since it not only satisfies our needs for shelter, food and fuel, but also provides the energy to sustain the lives of other organisms that we depend on and controls the functioning of many ecosystem services (Field 2001, Daily 2013). Many studies have shown strong positive correlations between human population density and NPP (Chown et al 2003, Luck 2007, Razali et al 2016, Zhou et al 2021. In addition, globally, humans tend to settle in areas of medium to high NPP (Milesi et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Possible future movement of the Hu line based on IPCC CMIP6 scenarios

Zheng

Liu

et al. 2022

Environ. Res. Commun.

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Whether the Hu line will move into west China is a serious issue that has implications for socioeconomic development, human geography and the environment. Based on the data related to four different levels of radiative forcing detailed in CMIP6, in this study, we analyzed the trends in precipitation and NPP (net primary productivity) on both sides of the Hu line and the ‘Central Spine of Beautiful China’ and calculated how far the 400mm iso-precipitation line and the equivalent NPP line will shift westward to explore the possibility of Hu line movement. The results show that, under all four scenarios, both the precipitation and NPP on the west side of the Hu line will increase significantly. The central spine could help to connect the eastern and western parts of the China and reduce the development imbalance between them. The 400mm iso-precipitation line and the equivalent NPP line will move westward significantly by 2100 (Average moving distance more than 150km for precipitation and 300km for NPP) and lie across the Qinghai–Tibet Plateau; the increases in precipitation and NPP within the ‘Central Spine of Beautiful China’ will be greater than those in the west of China. In addition, using population data under four SSPs, we also analyzed the population distribution changes based on Hu line under the influence of futural socioeconomic developments. All these results demonstrate that there will be a possibility of the Hu line moving into west China in the future.

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Mapping Human Impact on Net Primary Productivity Using MODIS Data for Better Policy Making

Cited by 6 publications

References 64 publications

Monitoring green biomass utilizing remote sensing techniques for agriculture and forest areas in East Malaysia

Monitoring green biomass utilizing remote sensing techniques for agriculture and forest areas in East Malaysia

Human activities rather than climate dominated the grassland net primary production in the three basins of the Hexi Corridor, North‐Western China

Possible future movement of the Hu line based on IPCC CMIP6 scenarios

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