land use conversion
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Geoderma ◽  
2022 ◽  
Vol 407 ◽  
pp. 115568
Author(s):  
Zhijun Wei ◽  
Jun Shan ◽  
Reinhard Well ◽  
Xiaoyuan Yan ◽  
Mehmet Senbayram

Author(s):  
Yijie Shi ◽  
Meiyan Wang ◽  
Tongyan Yao ◽  
Lingying Xu ◽  
Xuezheng Shi

Objective of investigation: Land use conversion strongly alters soil structure and substantially affects soil organic carbon (SOC) sequestration. Changing from an anaerobic paddy field (PF) to a dry land easily causes SOC loss due to stimulation of C decomposition. However, no evidence of SOC loss from PF to intensive vegetable cultivation has been certainly presented. Experimental material: This study was conducted on the long-term cultivated open-field vegetable (OFV) and greenhouse vegetable (GHV) planting area converted from old PF in China. Undisturbed soil cores, natural structured soil, and disturbed soil from top soil layers were using for further analyses. Methods of investigation: To comprehensively investigate SOC and soil structure change in the land use conversion of PF to OFV and PF to GHV, we used 13C-CPMAS NMR spectroscopy to classify the SOC fractions. The soil macropores (> 50 μm) was valued by X-ray computed tomography, and soil aggregates distribution was determined by wet sieving method. Data collection: Data were obtained from the above-mentioned measurements and statistically analyzed in R. Results: The result showed that the SOC stock increased 1-fold from PF to GHV. SOC stability increased with recalcitrant C (aromatic-C and carbonyl-C) raised by 21 %–27 % in GHV bulk soil. Both macropores and macroaggregates (> 250 μm) increased in GHV, accompanied by an accumulation of recalcitrant C in large macroaggregates. Conclusions: we confirmed the expanded GHV cultivation sequestered more belowground SOC than PF, associated with the amplified physical protection by enhancing soil aggregation and by redistributing of soil macropores.


Wetlands ◽  
2021 ◽  
Vol 42 (1) ◽  
Author(s):  
Syrus Cesar P. Decena ◽  
Sarah Villacorta-Parilla ◽  
Arwin O. Arribado ◽  
Dionesio R. Macasait ◽  
Michael S. Arguelles ◽  
...  

2021 ◽  
Vol 19 ◽  
Author(s):  
Liyana Zainudin ◽  
Zaharah Mohd Yusoff ◽  
Saiful Aman Sulaiman ◽  
Jaiya Abu

Land use planning is part and parcel of both land development and town planning. In Malaysia, these two areas are steered independently, the former by a state or district’s land office and the latter by the state’s local authority. This study looks at the aspects of land development where land use conversion plays a crucial part, where it brings significance to land revenue. As the leading district in Malaysia, the district of Petaling is undeniably the busiest land office in the nation, working hand-in-hand with three city councils. Land premium that is imposed on approved applications for land use conversion has been one of the main contributors to the district and state’s revenue as a whole. Given the hefty charges that have been imposed by the consultants for land use conversions, it is found that the application charges that are imposed by the land office are minimal. An assessment study on land conversion has been conducted and the result shows that the local community assessment score on familiarity, collectively stands at only 40%. It is recommended that an awareness on land use as basic knowledge should be given priority as it may contribute to more efficient land development and town planning, as a whole.


Author(s):  
Monica L. Noon ◽  
Allie Goldstein ◽  
Juan Carlos Ledezma ◽  
Patrick R. Roehrdanz ◽  
Susan C. Cook-Patton ◽  
...  

AbstractAvoiding catastrophic climate change requires rapid decarbonization and improved ecosystem stewardship at a planetary scale. The carbon released through the burning of fossil fuels would take millennia to regenerate on Earth. Though the timeframe of carbon recovery for ecosystems such as peatlands, mangroves and old-growth forests is shorter (centuries), this timeframe still exceeds the time we have remaining to avoid the worst impacts of global warming. There are some natural places that we cannot afford to lose due to their irreplaceable carbon reserves. Here we map ‘irrecoverable carbon’ globally to identify ecosystem carbon that remains within human purview to manage and, if lost, could not be recovered by mid-century, by when we need to reach net-zero emissions to avoid the worst climate impacts. Since 2010, agriculture, logging and wildfire have caused emissions of at least 4.0 Gt of irrecoverable carbon. The world’s remaining 139.1 ± 443.6 Gt of irrecoverable carbon faces risks from land-use conversion and climate change. These risks can be reduced through proactive protection and adaptive management. Currently, 23.0% of irrecoverable carbon is within protected areas and 33.6% is managed by Indigenous peoples and local communities. Half of Earth’s irrecoverable carbon is concentrated on just 3.3% of its land, highlighting opportunities for targeted efforts to increase global climate security.


Forests ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1579
Author(s):  
Amel Balla ◽  
Allaoua Silini ◽  
Hafsa Cherif-Silini ◽  
Ali Chenari Bouket ◽  
Warren Keith Moser ◽  
...  

Forests are an essential component of the natural environment, as they support biodiversity, sequester carbon, and play a crucial role in biogeochemical cycles—in addition to producing organic matter that is necessary for the function of terrestrial organisms. Forests today are subject to threats ranging from natural occurrences, such as lightning-ignited fires, storms, and some forms of pollution, to those caused by human beings, such as land-use conversion (deforestation or intensive agriculture). In recent years, threats from pests and pathogens, particularly non-native species, have intensified in forests. The damage, decline, and mortality caused by insects, fungi, pathogens, and combinations of pests can lead to sizable ecological, economic, and social losses. To combat forest pests and pathogens, biocontrol may be an effective alternative to chemical pesticides and fertilizers. This review of forest pests and potential adversaries in the natural world highlights microbial inoculants, as well as research efforts to further develop biological control agents against forest pests and pathogens. Recent studies have shown promising results for the application of microbial inoculants as preventive measures. Other studies suggest that these species have potential as fertilizers.


2021 ◽  
Vol 22 (11) ◽  
Author(s):  
Sri Heriza ◽  
DAMAYANTI BUCHORI ◽  
IDHAM SAKTI HARAHAP ◽  
NINA MARYANA

Abstract. Heriza S, Buchori D, Harahap IS, Maryana N. 2021. Response of termite communities to natural forest conversion. Biodiversitas 22: 5092-5096. Natural forest conversion can affect termite communities resulting from the various types of land use conversion. This study aims to examine the impacts of natural forest conversion on termite communities based on species richness, feeding groups, and termite species composition. Four land use types were evaluated on a gradient from the least to the most disturbing: natural forest, plantation forest, oil palm plantations and settlements. The method used to observe termites in this study is a plot measured 50 m x 10 m and was divided into sub-plots of 5 m x 5 m. The termites were collected from leaf litter and soil, dead wood, trunks, and nests. The response of the termite community to the conversion of natural forest functions into other forms of land use types, where for termite species richness, there was no significant differences between land uses, but for abundance and based on feeding groups there were difference between them.


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