Estimation of gross primary production of irrigated maize using Landsat-8 imagery and Eddy Covariance data

Madugundu, Rangaswamy; Al‐Gaadi, Khalid A.; Tola, ElKamil; Kayad, Ahmed; Jha, C. S.

doi:10.1016/j.sjbs.2016.10.003

Cited by 30 publications

(24 citation statements)

References 51 publications

(90 reference statements)

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“…The VPM is a light-use efficiency model that utilizes remote sensing imagery to estimate GPP based on the impacts of temperature, water stress, and phenology [40]. GPP from Landsat data based on VPM estimates has been validated by several studies that indicate good agreement with CO 2 eddy flux towers [41,42]. The potential of using the VPM model to scale up GPP estimation in Indonesia has also been evaluated for CO 2 flux tower sites that use MODIS data [43].…”

Section: Introductionmentioning

confidence: 99%

Changes in Gross Primary Production (GPP) over the Past Two Decades Due to Land Use Conversion in a Tourism City

Nuarsa

As-syakur

Gunadi

et al. 2018

IJGI

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Understanding the changes in gross primary production (GPP), which is the total carbon fixation by terrestrial ecosystems through vegetation photosynthesis, due to land use conversion in a tourism city is important for carbon cycle studies. Satellite data from Landsat 5, Landsat 7 and Landsat 8 and meteorological data are used to calculate annual GPP for 1995, 2003 and 2014, respectively, using the vegetation production model (VPM) in the tourism city Denpasar, Bali, Indonesia. Five land use types generated from topographic maps in three different years over the past two decades are used to quantify the impacts of land use changes on GPP estimation values. Analysis was performed for two periods to determine changes in land use and GPP value as well as their speed. The results demonstrated that urban land development, namely, the increase of settlement areas due to tourism activity, had overall negative effects on terrestrial GPP. The total GPP of the whole area decreased by 7793.96 tC year −1 (12.65%) during the study period. The decline is due to the conversion of agriculture and grassland area into settlements, which caused the city to lose half of its ability to uptake carbon through vegetation. However, although forest area is declining, forest maintenance and restoration by making them protection areas has been helpful in preventing a drastic decline in GPP value over the past two decades. This study provides information that is useful for carbon resource management, tourism, policy making and scholars concerned about carbon reduction in a tourism city.

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Section: Introductionmentioning

confidence: 99%

Changes in Gross Primary Production (GPP) over the Past Two Decades Due to Land Use Conversion in a Tourism City

Nuarsa

As-syakur

Gunadi

et al. 2018

IJGI

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“…Liu et al (2014) demonstrate that, in Hawai'i, most varieties produced fruit 4 yr after planting, with an average of 47 ± 8 fruit produced by the young trees, increasing to 130 ± 22 fruit per tree after 7 yr and continuing to increase throughout the study. Measurements indicate differences in net primary productivity potential, such as SPAD and leaf intersection, which has been shown to correlate to productivity in other crop species (e.g., Charbonnier et al, 2017; Madugundu et al, 2017) and in breadfruit (Lincoln et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Early Growth of Breadfruit in a Variety × Environment Trial

et al. 2019

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Breadfruit [Artocarpus altilis (Parkinson) Fosberg] is growing in agronomic importance throughout the global tropics as a result of its potentially high yield and nutritious, carbohydrate‐rich fruit. A bottleneck to expanded production of breadfruit is the lack of agronomic performance metrics and growth parameters, including an understanding of variety × environment interactions among commonly grown varieties. To address this knowledge gap, four varieties of breadfruit (‘Otea, Fiti, Pua‘a, Ma‘afala) available at the commercial scale were established in a randomized complete block design at five diverse sites in Hawai'i. Soil, architectural, physiological, and climate data were collected on 18‐mo‐old trees in 2018. Growth rates varied considerably for height (0.44–2.78 m yr−1), diameter at breast height (0.85–5.19 cm yr−1), and canopy width (0.14–1.35 m yr−1). Diameter was significantly correlated to tree height (r2 = 0.88), canopy width (r2 = 0.83), and canopy volume (r2 = 0.94). Growth was significantly different between sites, and some variety × site interactions were significant. Univariate and multivariate linear regressions were used to explore relationships between growth and climate, soils, and architecture. Future work will focus on the continued evaluation of variety × environmental influence on fruit production and fruit quality and on promoting this network of sites as a valuable resource for the study of an underutilized crop species with substantial potential to be a major crop in the tropics. Core Ideas Breadfruit, while rapidly growing in importance globally, suffers from a lack of agronomic study. To our knowledge, the first variety × environment trial network of breadfruit was established in Hawai'i. Examination of initial growth rates show considerably higher rates than represented in the literature. Multiple climate and soil parameters significantly correlate to early growth.

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“…NDVI is mostly sensitive to photosynthetic activity, i.e., the amount of chloroplasts in the canopy (Xiao et al, 2004a). In this study, the Enhanced Vegetation Index (EVI) (Heute et al, 2002) was preferred to NDVI because it is much less sensitive to aerosol and soil background effects, and less subject to signal saturation (Huete et al, 2002;Xiao et al, 2003;Xiao et al, 2004a;Xiao et al, 2004b;Li et al, 2007;Bajgain et al, 2015;Madugundu et al, 2017).…”

Section: Evi Is Calculated As Followsmentioning

confidence: 99%

“…Indices are transformations of two or more spectral bands of satellite images designed to enhance vegetation properties and allow robust spatial and temporal comparison of terrestrial photosynthetic activity and canopy structural variations (Huete et al, 2002) and shifts in temporal dynamics of PP (Huete et al, 2002;Xiao et al, 2003;Xiao et al, 2004a;Xiao et al, 2004b;Jackson et al, 2004;Li, et al, 2007;Petrosillo et al, 2013a;Bajgain et al, 2015;Madugundu et al, 2017), especially following disturbances such as fire, drought, flood, frost, or other human-driven events (Pettorelli et al, 2005;Caccamo et al, 2014;Zurlini et al, 2014 Despite its limited size, the site has its own management authority to take planning and management decisions (Petrosillo et al, 2010). The authority also maintains a wildfire prevention and mitigation plan; however, in August 2007 an anthropogenic fire originating in the surrounding agricultural area and driven by wind severely burned 170 ha of the wetland, putting the conservation of the wetland habitat at risk.…”

Section: Evi Is Calculated As Followsmentioning

confidence: 99%

Application of vegetation index time series to value fire effect on primary production in a Southern European rare wetland

Semeraro

Vacchiano

Aretano³

et al. 2019

Ecological Engineering

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Fire disturbance is an intrinsic component of the Mediterranean biome playing an important role in ecosystem dynamics and processes. However, frequent and severe wildfires can be detrimental to natural ecosystems, particularly in small natural protected areas, where they may hamper the flow of ecosystem services (ES). While post-fire dynamics of individual ES are heavily context-dependent, the primary productivity of the ecosystem can be regarded as a generic driver of several provisioning and regulating ES, as it represents the amount of energy available to plants for storage, growth, and reproduction, which drives future ecosystem structure and functions. The aim of this study is to evaluate the effect of anthropogenic wildfire on the primary productivity of a rare wetland ecosystem in the Natura 2000 site "Torre Guaceto". Productivity was estimated by calculating a 15-year time series of vegetation indices (EVI and NDWI) from remotely sensed MODIS imagery. Our results in terms of PP trends may be relevant to assess the change in ecosystems services provided by wetlands. Interactions between wildfire, ecosystem productivity and climate were then analyzed. During the selected period, climate did not play a significant effect on primary productivity, which was mainly driven by post-fire vegetation recovery. Findings of the present study demonstrate that the wildfire affecting the Natural Protected Area of Torre Guaceto in summer 2007 had a major effect on primary productivity, inducing the regeneration of Phragmites and the replacement of old individuals by structurally and functionally better ones.

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Estimation of gross primary production of irrigated maize using Landsat-8 imagery and Eddy Covariance data

Cited by 30 publications

References 51 publications

Changes in Gross Primary Production (GPP) over the Past Two Decades Due to Land Use Conversion in a Tourism City

Changes in Gross Primary Production (GPP) over the Past Two Decades Due to Land Use Conversion in a Tourism City

Early Growth of Breadfruit in a Variety × Environment Trial

Application of vegetation index time series to value fire effect on primary production in a Southern European rare wetland

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