Oil palm expansion increases the vectorial capacity of dengue vectors in Malaysian Borneo

Changes in land-use and the associated shifts in environmental conditions can have large effects on the transmission and emergence of disease. Mosquito-borne disease are particularly sensitive to these changes because mosquito growth, reproduction, survival and susceptibility to infection are all thermally sensitive traits, and land use change dramatically alters local microclimate. Predicting disease transmission under environmental change is increasingly critical for targeting mosquito-borne disease control and for identifying hotspots of disease emergence. Mechanistic models offer a powerful tool for improving these predications. However, these approaches are limited by the quality and scale of temperature data and the thermal response curves that underlie predictions. Here, we used fine-scale temperature monitoring and a combination of empirical, laboratory and temperature-dependent estimates to estimate the vectorial capacity of Aedes albopictus mosquitoes across a tropical forest – oil palm plantation conversion gradient in Malaysian Borneo. We found that fine-scale differences in temperature between logged forest and oil palm plantation sites were not sufficient to produce differences in temperature-dependent trait estimates using published thermal performance curves. However, when measured under field conditions a key parameter, adult abundance, differed significantly between land-use types, resulting in estimates of vectorial capacity that were 1.5 times higher in plantations than in forests. The prediction that oil palm plantations would support mosquito populations with higher vectorial capacity was robust to uncertainties in our adult survival estimates. These results provide a mechanistic basis for understanding the effects of forest conversion on mosquito-borne disease risk, and a framework for interpreting emergent relationships between land-use and disease transmission. As rising demand for palm oil products drives continued expansion of plantations, these findings have important implications for conservation, land management and public health policy at the global scale.

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Effects of long-term mixed land use of human settlement and oil palm plantation on the groundwater quality of ex-promontory land

IOSR Journal of Environmental Science Toxicology and Food Technology ◽

10.9790/2402-08730109 ◽

2014 ◽

Vol 8 (7) ◽

pp. 01-09

Author(s):

SitiZulaikha Othman ◽

◽

Roslan Hashim ◽

Mohamad FaizalTajulBaharuddin ◽

Sharifah Mohamad

Keyword(s):

Land Use ◽

Groundwater Quality ◽

Oil Palm ◽

Human Settlement ◽

Oil Palm Plantation ◽

Mixed Land Use

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Assessment of fertility status of soils under land use types in Egbema Area, Imo State, Nigeria

Journal of Agriculture and Food Sciences ◽

10.4314/jafs.v17i2.1 ◽

2020 ◽

Vol 17 (2) ◽

pp. 1-13

Author(s):

C. Chikere-Njoku

Keyword(s):

Land Use ◽

Bulk Density ◽

Soil Ph ◽

Oil Palm ◽

Fallow Land ◽

Cultivated Land ◽

Fertility Status ◽

Oil Palm Plantation ◽

Land Use Types ◽

Land Use System

The study was conducted to investigate fertility status under four different land use types (oil palm plantation, pineapple orchard, cassava cultivated land and fallow land use system) in Umuekem, Ohaji/Egbema of Imo State, Nigeria. Composite samples were collected from various depths (10-15cm, 15-30cm, 30-45cm) across these land use patterns and analyzed in the laboratory using the standard procedure. Data generated were subjected to statistical analysis. Results obtained showed significant differences (p ≥ 0.05) in silt-clay ratio, bulk density, total porosity, water holding capacity, soil pH, organic carbon, available phosphorus, TN and ECEC across the four land use types studied. The soils were predominantly loamy sand surface and sandy clay loam in the subsoil exception of pineapple orchard with sandy loam topsoil over sandy clay loam subsoil. The silt clay ratio (SCR) showed ranges of 0.10-0.30, 0.10-0.36, 0.07 – 0.30, and 0.06- 0.20 in land use types of oil palm plantation, pineapple orchard, cassava cultivated land and fallow land respectively. The bulk density ranged of (1.61 – 1.77 g/cm3) for oil palm, (1.34 – 1.58 g/cm3) for pineapple (1.42 – 1.49 g/cm3) cassava and (1.45 – 1.48 g/cm3) in forest land use system. The soils of the four land use types were generally acidic. The mean values of soil pH (H20) were oil palm plantation (5.11), pineapple orchard (5.03), cassava cultivated land (5.35) and fallow land (5.40). The soil pH recorded low variation in all the land use types. The organic carbon and total nitrogen recorded high variation (>52.57% < 85.67%, >79.19 < 95.77) in all the different land use types. Calcium-magnesium ratio (Ca: Mg) recorded high variation (37.36%) in forest land use system, low variation (18.77%) in pineapple orchard and moderate in cassava (27.51%) and oil palm plantation (28.23). The low Ca: Mg ratio inhibits uptake and causes Ca deficiency thereby resulting in low fertility status of the soil. C: P recorded high variation (≥ 53.77% ≤ 77.73%) in all the studied land use types. O.C correlated positively and highly significant with available phosphorus, ECEC and T.N. The findings also indicated that bulk density correlated positively with ECEC and percentage base saturation. It is recommended that land use approach should be adopted for effective and sustainable management of the soil fertility. Keywords: Fertility status, Soils, Land use types

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Costs and Carbon Sequestration Assessment for REDD+ in Indonesia

Forests ◽

10.3390/f11070770 ◽

2020 ◽

Vol 11 (7) ◽

pp. 770

Author(s):

Guifang Liu ◽

Qing Liu ◽

Mengxiao Song ◽

Junsheng Chen ◽

Chuanrong Zhang ◽

...

Keyword(s):

Land Use ◽

Carbon Sequestration ◽

Carbon Emissions ◽

Oil Palm ◽

Forest Degradation ◽

Opportunity Costs ◽

Forest Conversion ◽

Tropical Regions ◽

Sensitivity Assessment ◽

Gain Loss

Research Highlights: Our findings highlight that the contribution of carbon sequestration from plantations to REDD+ will remain limited, and that opportunity costs in Southeast Asia will likely increase, due to future oil palm expansion. Background and Objectives: Land use, land-use change, and forestry (LULUCF) are significant sources of carbon emissions. The United Nations Framework Convention on Climate Change (UNFCCC) agreed that the Reducing Emissions from Deforestation and Forest Degradation Plus program, also known as REDD+, could contribute to carbon sinks in tropical regions. These reductions could serve as carbon credits that offset emissions from other sources. Materials and Methods: This study uses the cellular automaton technique to simulate the business-as-usual (BAU) scenario and the gain-loss method, to measure carbon emissions resulting from forest conversion. The output of the integration of the models makes it possible to evaluate one of the most important financial costs: opportunity costs. Two scenarios (with and without consideration of carbon sequestration) in rubber and oil palm plantations are examined. Results: A sensitivity assessment in Kalimantan, Indonesia, shows that carbon sequestration from plantations affects value of opportunity costs less than social discount rates. Further analysis suggests that oil palm plantations have a greater impact than rubber plantations. Conclusions: Our study provides a case that can be applied to other regions for evaluating the impacts of plantation carbon sequestration, and insights that can help local policymakers design a financially attractive REDD+ program in other forest areas of the world.

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Evapotranspiration assessments from drone-based thermography - a method comparison in an oil palm plantation and a look ahead

10.5194/egusphere-egu2020-20725 ◽

2020 ◽

Author(s):

Alexander Röll ◽

Florian Ellsäßer ◽

Christian Stiegler ◽

Tania June ◽

Hendrayanto Hendrayanto ◽

...

Keyword(s):

Land Use ◽

Energy Balance ◽

Eddy Covariance ◽

Spatial Resolution ◽

Oil Palm ◽

Reference Method ◽

Net Radiation ◽

Near Surface ◽

Oil Palm Plantation ◽

Deming Regression

<p>Evapotranspiration (ET) is a key flux in hydrological cycles; it is affected by both climate and land-use change. A recent study across 42 study sites in four land-use types in lowland Sumatra (Indonesia) reported that local and regional transpiration are on the rebound due to the high water use and continuing expansion of oil palm plantations. Conventional ET assessment methods such as satellite-based thermography or the eddy covariance (EC) technique lack the high spatial resolution and spatial replicability, respectively, that are required for ET assessments in dynamic and heterogeneous, mosaic-like landscapes. For such assessments of ET, near-surface airborne thermography offers new opportunities for studies with high numbers of spatial replicates and in a fine spatial resolution. In our study, we tested drone-based thermography and the subsequent application of three energy balance models (DATTUTDUT, TSEB-PT, DTD) using the widely accepted EC technique as a reference method. The study site was a mature oil palm plantation in lowland Sumatra. For 61 flight missions, latent heat flux estimates of the DATTUTDUT model with measured net radiation agreed well with eddy covariance measurements (r&#178;=0.85; MAE=47; RMSE=60) across variable weather conditions and daytimes. Confidence intervals for slope and intercept of a Deming regression suggest no difference between drone-based and eddy covariance method, thus indicating interchangeability. TSEB-PT and DTD yielded agreeable results, but all three models are highly sensitive to the configuration in which net radiation is assessed. Overall, we conclude that drone-based thermography with energy-balance modeling is a reliable method complementing available methods for ET studies. It offers promising, additional opportunities for fine grain and spatially explicit studies. Further steps in the near future will include the testing and if necessary calibrating of the method across different biomes as well as ecological applications.</p>

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Impact of Logging and Forest Conversion to Oil Palm Plantations on Soil Bacterial Communities in Borneo

Applied and Environmental Microbiology ◽

10.1128/aem.02541-13 ◽

2013 ◽

Vol 79 (23) ◽

pp. 7290-7297 ◽

Cited By ~ 72

Author(s):

Larisa Lee-Cruz ◽

David P. Edwards ◽

Binu M. Tripathi ◽

Jonathan M. Adams

Keyword(s):

Forest Soil ◽

Oil Palm ◽

Bacterial Communities ◽

Soil Bacteria ◽

Forest Conversion ◽

Soil Bacterial Communities ◽

Oil Palm Plantation ◽

Β Diversity ◽

Logged Forest ◽

Soil Bacterial

ABSTRACTTropical forests are being rapidly altered by logging and cleared for agriculture. Understanding the effects of these land use changes on soil bacteria, which constitute a large proportion of total biodiversity and perform important ecosystem functions, is a major conservation frontier. Here we studied the effects of logging history and forest conversion to oil palm plantations in Sabah, Borneo, on the soil bacterial community. We used paired-end Illumina sequencing of the 16S rRNA gene, V3 region, to compare the bacterial communities in primary, once-logged, and twice-logged forest and land converted to oil palm plantations. Bacteria were grouped into operational taxonomic units (OTUs) at the 97% similarity level, and OTU richness and local-scale α-diversity showed no difference between the various forest types and oil palm plantations. Focusing on the turnover of bacteria across space, true β-diversity was higher in oil palm plantation soil than in forest soil, whereas community dissimilarity-based metrics of β-diversity were only marginally different between habitats, suggesting that at large scales, oil palm plantation soil could have higher overall γ-diversity than forest soil, driven by a slightly more heterogeneous community across space. Clearance of primary and logged forest for oil palm plantations did, however, significantly impact the composition of soil bacterial communities, reflecting in part the loss of some forest bacteria, whereas primary and logged forests did not differ in composition. Overall, our results suggest that the soil bacteria of tropical forest are to some extent resilient or resistant to logging but that the impacts of forest conversion to oil palm plantations are more severe.

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Faktor Penentu Produksi pada Perkebunan Rakyat Kelapa Sawit di Kabupaten Mamuju Utara

Jurnal Teknosains ◽

10.22146/teknosains.38914 ◽

2019 ◽

Vol 9 (1) ◽

pp. 58

Author(s):

Dimas Deworo Puruhito ◽

Jamhari Jamhari ◽

Slamet Hartono ◽

Irham Irham

Keyword(s):

Land Use ◽

Data Analysis ◽

Oil Palm ◽

Land Area ◽

Function Model ◽

Family Labor ◽

Oil Palm Plantation ◽

Average Production ◽

Npk Fertilizer

There are three patterns of smallholder oil palm plantation in North Mamuju regency, ie plasma, IGA (Income Generating Activity), and mandiri (independent). Independent smallholder plantations are plantations managed by the community themselves without the involvement of others. While the partnership patterns can be divided into plasma and IGA. The partnership is a form of fostering of smallholders plantations by large private plantation in this area. This study aims to determine the amount of oil palm production on smallholder plantations and the factors that affect. The research was conducted in North Mamuju Regency, West Sulawesi Province which has the widest smallholder oil palm plantation in Sulawesi Island with various pattern. Four villages in two sub-districts were chosen purposively consideration with having three patterns of smallholder plantations. The sampling of farmers using snowball method after stratification in each pattern. Selected 35 plasma farmers, 70 IGA farmers, and 55 independent farmers. Data analysis was performed with Cobb-Doulas function model in the normalized logarithm, using Eviews 6 software. The findings are the average production of 56,840 kg, with productivity of 20,300 kg/ha. Input of land area, NPK fertilizer, age of oil palm crops, outside family labor, frequency of estate sanitation and distance of estate to river is the determinant input to production. Input land area is found as the most elastic input. However, land use for oil palm plantations should still refer to existing legislation.

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Analysis of Forest Function Transfer to Oil Palm Plantation in Parenggean District with the Remote Sensing Approach and Geographic Information System

Journal of Applied Geospatial Information ◽

10.30871/jagi.v3i2.1265 ◽

2019 ◽

Vol 3 (2) ◽

pp. 217-223

Author(s):

Marboles Kundrat ◽

Frederik Samuel Papilaya

Keyword(s):

Remote Sensing ◽

Oil Palm ◽

Systems Approach ◽

Research Area ◽

Geographic Information ◽

Forest Conversion ◽

Oil Palm Plantation ◽

Forest Land Cover ◽

Forest Function ◽

Function Transfer

The island of Kalimantan is one of the islands that has a vast forest. Kalimantan Island is also the most important island for Indonesia, even the world. Parenggean is one of the sub-districts located in Kotawaringin Timur Regency, Central Kalimantan Province. Parenggean sub-district with an area of 493.15 km² is one of the sub-districts in East Kotawaringin Regency which has a very large oil palm plantation. This study will present data on the amount of forest land cover that has been converted. To get extensive forest conversion, this research uses the Remote Sensing and Geographic Information Systems approach. The result of research this proves there have been over the function forests became oil palm plantation in Parenggean District. The area of forest that was converted into oil palm plantation in the research area is 5,143.15 hectares in 1990-2000 and 17,560.45 hectares in 2000-2010.

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Konflik Tata Ruang Kehutanan Dengan Tata Ruang Wilayah (Studi Kasus Penggunaan Kawasan Hutan Tidak Prosedural Untuk Perkebunan Sawit Provinsi Kalimantan Tengah)

BHUMI Jurnal Agraria dan Pertanahan ◽

10.31292/jb.v3i1.226 ◽

2017 ◽

Vol 3 (1) ◽

Author(s):

Eko N Setiawan ◽

Ahmad Maryudi ◽

Ris H Purwanto ◽

Gabriel Lele

Keyword(s):

Land Use ◽

Oil Palm ◽

Spatial Planning ◽

Forest Area ◽

Forest Conversion ◽

Spatial Integration ◽

Central Kalimantan ◽

Government Administration ◽

The Government ◽

Spatial Plan

AbstractLaw No. 26 Year 2007 on Spatial Planning (UUPR) mandated that all levels of government administration, ranging from the national, provincial, district/ city are obligated to prepare Spatial Plan (RTR). Until 2012, Central Kalimantan is one of the provinces which have not completed its Spatial Plan; one of the reasons was the lack of spatial integration of forestry spatial planning and provincial spatial planning of Central Kalimantan.The absence of spatial integration of forestry and provincial spatial planning of Central Kalimantan has the implication in triggering conflicts of land use. Forest areas were converted into oil palm plantations without any official procedures. There are 282 units of oil palm companies, occupying 3.9 millions hectares of forest area, with non-procedural procedures to convert forest area into oil palm plantation.To resolve this problem, the Government has revised the regulation of forest conversion by issuing PP No. 60/2012, provides opportunities for oil palm plantations, which under the Law of Forestry located in forest area but based on RTRWP of Central Kalimantan lies on APL or cultivation area, given the opportunity to re-apply the permit/license. IntisariUndang- Undang No. 26 Tahun 2007 tentang Penataan Ruang (UUPR) mengamanatkan bahwa semua tingkatan administrasi pemerintahan, mulai dari nasional, provinsi, kabupaten/kota diwajibkan menyusun Rencana Tata Ruang (RTR). Kalimantan Tengah sampai dengan tahun 2012 merupakan salah satu Provinsi yang belum menyelesaikan Tata Ruang, salah satu penyebabnya karena belum adanya padu serasi antara tata ruang kehutanan dengan tata ruang Provinsi Kalimantan Tengah.Implikasi dari tidak adanya padu serasi antara tata ruang kehutanan dengan tata ruang provinsi Kalimantan Tengah adalah terjadinya konflik dalam penggunaan ruang, dimana terjadi penggunaan kawasan hutan tidak prosedural untuk perkebunan sawit di dalam kawasan hutan di Provinsi Kalimantan Tengah sebanyak 282 unit perusahaan sawit seluas 3,9 juta hektar.Upaya penyelesaian permasalahan penggunaan kawasan hutan untuk perkebunan sawit di Provinsi Kalimantan Tengah diakukan dengan revisi kebijakan tentang alih fungsi hutan PP nomor 60 tahun 2012 yang memberikan kesempatan bagi perkebunan sawit yang berdasarkan Undang-Undang Kehutanan berada di dalam kawasan hutan namun berdasarkan RTRWP Provinsi Kalimantan Tengah berada di kawasan APL maupun budidaya, diberikan kesempatan untuk mengurus perijinannya.

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