Mapping and analysis land-use and land-cover changes during 1996-2016 in Lubuk Kertang mangrove forest, North Sumatra, Indonesia

Basyuni, Mohammad; Fitri, Annisa; Harahap, Zulham Apandy

doi:10.1088/1755-1315/126/1/012110

Cited by 10 publications

(2 citation statements)

References 6 publications

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“…On the other hand, in North Sumatra province, Indonesia, oil palm plantation became the fourth proportion of deforested secondary mangrove forest converted to other land uses during the period of 1990-2015 (Basyuni et al 2018b). In Lubuk Kertang site, Langkat, North Sumatra, oil palm plantation was a driver of 44% of mangrove loss from 2006-2016 (Basyuni et al 2018c). The present study, therefore, may answer the question why Indonesian palm oil productivity is lower than Malaysia.…”

Section: Implication To Yield Gap Causes From Planting Materialsmentioning

confidence: 99%

Cluster analysis of polyisoprenoid in oil palm (Elaeis guineensis) leaves in different land-uses to find the possible cause of yield gap from planting materials

et al. 2018

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Basyuni M, Wati R, Deni I, Tia AR, Slamet B, Siregar ES, Syahputra I. 2018. Cluster analysis of polyisoprenoid in oil palm(Elaeis guineensis) leaves in different land-uses to find the possible cause of yield gap from planting materials. Biodiversitas 19: 1492-1501. The distribution and occurrence of polyprenols and dolichols in the leaves of oil palm (Elaeis guineensis Jacq.) plantations indifferent land-uses in North Sumatra, Indonesia were analyzed using two-dimensional thin layer chromatography (2D-TLC). Eighty-oneof oil palm leaves were sampled to represent twenty-seven sites of land-uses, namely paddy field (four locations), mangrove (threelocations) in Lubuk Kertang, Langkat, North Sumatra. In addition, samples from four groups of smallholders in Stabat, Langkat, sixsites in Bangun Bandar, Serdang Bedagai, and ten sites on the campus of Universitas Sumatera Utara (USU), North Sumatra werecollected. In the leaves, only one type (type II) with respect to the distribution of polyisoprenoids was detected: having the presence ofboth polyprenols and dolichols. Either type I, having predominance of dolichols over polyprenols or type III, displaying dominatingpolyprenols over dolichols were not observed. Results also showed that chain-length distribution of ficaprenols (C50-C60) without longerpolyprenols (C85-C100) and dolichols of C85-C100 was detected in the paddy field, mangroves, and one site in USU campus. Thispolyisoprenoid profile was close to dura type of Elaeis guineensis. By contrast, the remaining land-uses had ficaprenols and longerpolyprenols, and dolichols (C85-C100), which belong to tenera or pisifera type. To confirm this finding, a dendrogram was constructed.Cluster analysis demonstrated that twenty-seven sites of E. guineensis were grouped into appropriate types of dura, pifiera, and teneraaccordingly, indicating that the existence of polyisoprenoids in E. guineensis was a chemotaxonomic marker. The finding ofpolyisoprenoid pattern of E. guineensis as dura type in mangrove and paddy field sites may reveal significant causes of yield gap in oilpalm plantation from planting materials.

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Section: Implication To Yield Gap Causes From Planting Materialsmentioning

confidence: 99%

Cluster analysis of polyisoprenoid in oil palm (Elaeis guineensis) leaves in different land-uses to find the possible cause of yield gap from planting materials

et al. 2018

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“…This conversion, including the utilization of forest lands for the development of shrimp ponds in the 1980s, has been going on for many years, according to various historical records. The results of the research conducted by Basyuni et al (2018) show that during the 1990-2006 period, 51.5 ha of mangrove forest lands were converted into shrimp ponds. However, over time, the ponds managed by communities did not yield much profits; therefore, they went bankrupt.…”

Section: General Social-political Contextmentioning

confidence: 99%

Coastal Forest Re-Grabbing: A Case from Langkat, North Sumatra, Indonesia

Adhuri¹,

Syafi’i²,

Rahmayanti³

et al. 2023

Environment &Amp; Policy

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Grabbing in its various forms, such as land and maritime grabbing, has been a global concern. This is not only because it happened in many places but also the negative impacts on local people and the environment were often severe. Studies found that millions of local people were excluded from their access to resources they depended upon for decades or even generations. In some places, environmental impact occurred beyond the ability of the ecosystem to recover. This paper will also deal with the above issues. Nonetheless, while most studies focus on grabbing and their socio-environmental impacts, this paper will demonstrate the process of “re-grabbing.” This is how local community supported by NGOs and other agencies took back the control over the coastal mangrove forest taken and converted by a private company for palm oil plantation. This paper will explain the process and strategies employed by coastal communities in Langkat, North Sumatra, in resisting the palm oil plantation’s presence that has impacted their fishing and coastal livelihoods seriously. Interestingly, one of the strategies was “destroy and rehabilitate.” This is the destruction of coastal dikes and palm oil trees and the reestablishment of the mangrove forest. This strategy bears two results. The first is the recovery of the ecosystem, which supports the redevelopment of coastal livelihoods, the old and new. Second is the acknowledgment from the government on the fact that communities have rehabilitated the coastal mangrove well. This, in turn, has stimulated government to grand the communities the Hak Perhutanan Sosial (Social Forestry Right) to manage the designated forest. In conclusion, this paper will argue despite the fact that in most cases grabbing left the community and environment as the lost parties, with certain strategies the reality can be turned back for the favor of the communities and the environment.

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