Analysis of Forest Landscape Fragmentation in Samosir Island, North Sumatra

Samsuri,; Zaitunah, Anita; Manurung, J.

doi:10.1088/1755-1315/166/1/012007

Cited by 2 publications

(4 citation statements)

References 9 publications

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“…To improve the visual quality (texture, colour, and form) of satellite imagery, radiometric correction is used to reduce atmospheric disturbances such as clouds and fog in satellite photography. The pixel value that does not match the actual reflectance value of an object can be increased using radiometric correction [10]- [11].…”

Section: Amentioning

confidence: 99%

“…Visual interpretation and on-screen digitalization were employed as categorization methods in this study. One of the advantages of this method is that it can distinguish land cover based on pixel appearances that seem to be difficult when using automatic classification [10]. A field survey (ground check) is conducted to determine the truth and fix any discrepancies between the type of land cover represented on the map and actual field conditions [1].…”

Section: Amentioning

confidence: 99%

“…Change detection works with the principle of overlaying each land cover map being studied (2010 and 2015). The end result of this process is a change in the shape and size of each land cover according to its newest function [10]. These changes will provide information on what processes have occurred during the period of observation.…”

Section: Bmentioning

confidence: 99%

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Assessment of Five-Year Vegetation Cover Changes to Support Green Open Spaces Monitoring in Surakarta, Central Java, Indonesia

Harahap¹,

Poedjirahajoe²,

Santosa³

et al. 2021

J. Sylva Indonesiana

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Surakarta City's population is growing every year, putting pressure on the land and vegetation. Surakarta City has a population of 500,173 people in 2010. The population of this city is growing every year, driving an increase in the demand for land and living facilities. This study aims to analyze the availability of vegetated land as urban green space, and calculate the 5-year (2010–2015) vegetation cover changes. The methods used visual interpretation and on-screen digitization of the image Landsat 7 ETM+ satellite in 2010 and Landsat 8 OLI satellite image in 2015. The results show that the availability of vegetated land as urban green space in Surakarta City is lower than that mandated in Law Number 26 of 2007 concerning Spatial Planning. Vegetation cover decreased from 2010 to 2015 in Surakarta City, covering an area of 117.7 ha (2.6% of the city area) or an average of 23.5 ha (0.5%) per year. Research on the availability of green open spaces on a regular basis is expected to be part of the process of monitoring and evaluating urban development and as input for local governments in the decision-making process.

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Section: Amentioning

confidence: 99%

Section: Amentioning

confidence: 99%

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Assessment of Five-Year Vegetation Cover Changes to Support Green Open Spaces Monitoring in Surakarta, Central Java, Indonesia

Harahap¹,

Poedjirahajoe²,

Santosa³

et al. 2021

J. Sylva Indonesiana

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“…Analysis of land cover change was carried out using GIS. The method used followed Samsuri et al (2018). The measured fragmentation indices were patch area and patch density.…”

Section: Fragmentation Analysismentioning

confidence: 99%

Possible environmental and meteorological factors underlying scaly-breasted munia Lonchura punctulata (L.) mass mortality events in Southeast Asia’s urban and rural areas in September 2021

Wibowo

2021

Preprint

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Mass bird mortality is a rare event. This event could be happened and could be a combination of numerous factors. It could be something that's still completely unknown to us. In September 2021 in SE Asia, there were 2 mass bird mortality events of Lonchura punctulata. The first event happens on 9 September in rural area at 08.00 AM and second happens on 14 September at 12.00 PM in urban area. The results show that precipitation combined with the wind gust might be correlated with mass mortality. The results showed precipitation factors have contributed 71.18% (R2 = 0.714, P = 0.008) to the mortality and followed by wind gust with 28.81% contribution (R2 = 0.41, P = 0.08). The meteorological parameter was not the only factors affecting the mortality events. The landscapes in urban and rural areas have experienced fragmentations. Urban areas have severe fragmentation of vegetation covers with remaining vegetation covers were only 17.4% and patch density indices of 0.29. In contrast rural areas still have higher vegetation cover remnants about 21.12% and patch density indices of 0.93. Then severe meteorological events combined with the fragmented habitats of L. punctulata may explain the mass mortality of this bird species.

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Analysis of Forest Landscape Fragmentation in Samosir Island, North Sumatra

Cited by 2 publications

References 9 publications

Assessment of Five-Year Vegetation Cover Changes to Support Green Open Spaces Monitoring in Surakarta, Central Java, Indonesia

Assessment of Five-Year Vegetation Cover Changes to Support Green Open Spaces Monitoring in Surakarta, Central Java, Indonesia

Possible environmental and meteorological factors underlying scaly-breasted munia Lonchura punctulata (L.) mass mortality events in Southeast Asia’s urban and rural areas in September 2021

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