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1
Liang, Chun Xia, Floris F. van Ogtrop, and R. Willem Vervoort. "Detecting the impact of land cover change on observed rainfall." PeerJ 7 (August 26, 2019): e7523. http://dx.doi.org/10.7717/peerj.7523.
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Analysis of observational data to pinpoint impact of land cover change on local rainfall is difficult due to multiple environmental factors that cannot be strictly controlled. In this study we use a statistical approach to identify the relationship between removal of tree cover and rainfall with data from best available sources for two large areas in Australia. Gridded rainfall data between 1979 and 2015 was used for the areas, while large scale (exogenous) effects were represented by mean rainfall across a much larger area and climatic indicators, such as Southern Oscillation Index and Indian Ocean Dipole. Both generalised additive modelling and step trend tests were used for the analysis. For a region in south central Queensland, the reported change in tree clearing between 2002–2005 did not result in strong statistically significant precipitation changes. On the other hand, results from a bushfire affected region on the border of New South Wales and Victoria suggest significant changes in the rainfall due to changes in tree cover. This indicates the method works better when an abrupt change in the data can be clearly identified. The results from the step trend test also mainly identified a positive relationship between the tree cover and the rainfall at p < 0.1 at the NSW/Victoria region. High rainfall variability and possible regrowth could have impacted the results in the Queensland region.
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Makinde, E. O., and E. I. Oyebanji. "Remote Sensing and GIS Application to Erosion Risk Mapping in Lagos." Nigerian Journal of Environmental Sciences and Technology 4, no. 1 (March 2020): 40–53. http://dx.doi.org/10.36263/nijest.2020.01.0081.
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Increased population, unhealthy agricultural practices, indiscriminate land clearing and illegal structures have led to an increase of erosion in Nigeria and Lagos State in particular. This research focused on identifying land use/land cover changes in Eti-Osa LGA of Lagos State and estimating the actual erosion risk using Remote Sensing and Geography Information System. In addition, this research evaluated the perception of communities within the study area with the view to understanding the risk involved in erosion. Maximum Likelihood Algorithm was the classification method applied on the Landsat imageries (1986-2016) to identify the changes on the land use/land cover types. Analysis of Variance (ANOVA) was used to evaluate the perception of communities within the study area and Revised Universal Soil Loss equation (RUSLE) model was used to estimate the actual erosion risk. The result showed that the sediment yield of the study area was estimated to be between 0 to 48ton/ha/yr. The estimated soil losses were higher in Eti-Osa West compared to other parts of Iru/Victoria Island, and Ikoyi/Obalende areas which recorded low losses. Land uses mostly affected by very high and severe erosion are the bare soils and the crop lands having about 3% to 4% respectively. It can be concluded that rainfall, lack of cover for the surface soil were the major causes of soil loss in the study area.
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Mansergh, Ian. "North central Victoria – climate change and land-use: potentials for third century in a timeless land." Proceedings of the Royal Society of Victoria 122, no. 2 (2010): 161. http://dx.doi.org/10.1071/rs10024.
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For the 21st century, scenarios of future climate under global warming suggest that Bassian-Eyrean bioclimatic region of northern Victoria, centred on the North Central Catchment Management Authority (NCCMA), will become markedly warmer and drier. Significant climate change is a real possibility midcentury and some basic bio-physical attributes underpinning the current ecology, land-use and management will be altered. Societal adaptation to climate change will include enhancing landscape resilience and changes to the mix of inter-related ecosystem services. The increasing understanding of these inter-relationships will allow for the creation of a more holistic quantification and production of landscape services. In combination, these challenge the past land-use paradigm on the driest, inhabited continent. Following the mid-19th century gold rushes, land-use in the NCCMA represented the epitome of the colonial land-use paradigm through clearing for agriculture and pastoralism. Victoria has long had the highest percentage private land of any Australian state. The NCCMA catchment is the most denuded of native vegetation, with the smallest percentage of public land and conservation reserves, and is now the centre of a continental concentration of bioregions under high environmental stress. The original primacy of agriculture was fulfilled, sometimes under adverse circumstances, but resultant landscape legacies persist within the relative economic decline of Australian agriculture. The amelioration of these within a future land stewardship that is water-stressed, carbon constrained and prone to extreme weather events is a major challenge. Exploring landscape adaptation, the simple questions arise: From what? To what? This contribution examines broad land-use in the NCCMA in the long term context of climate change and adaptation, land-use and the perceived valuation of ecosystem services from the landscape. The increasing realisation of the interconnectedness of these phenomena and the necessity for ecologically sustainable agriculture provide enhanced drivers for the evolution of new landscape meanings in the context of an inter-generational equity and climate change response.
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Bennett, Andrew F., Greg J. Holland, Anna Flanagan, Sarah Kelly, and Michael F. Clarke. "Fire and its interaction with ecological processes in box-ironbark forests." Proceedings of the Royal Society of Victoria 124, no. 1 (2012): 72. http://dx.doi.org/10.1071/rs12072.
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Box-Ironbark forests extend across a swathe of northern Victoria on the inland side of the Great Dividing Range. Although extensively cleared and modified, they support a distinctive suite of plants and animals. Historical fire regimes in this ecosystem are largely unknown, as are the effects of fire on most of the biota. However, knowledge of the ecological attributes of plant species has been used to determine minimum and maximum tolerable fire intervals for this ecosystem to guide current fire management. Here, we consider the potential effects of planned fire in the context of major ecological drivers of the current box-ironbark forests: namely, the climate and physical environment; historical land clearing and fragmentation; and extractive land uses. We outline an experimental management and research project based on application of planned burns in different seasons (autumn, spring) and at different levels of burn cover (patchy, extensive). A range of ecological attributes will be monitored before and after burns to provide better understanding of the landscape-scale effects of fire in box-ironbark forests. Such integration of management and research is essential to address the many knowledge gaps in fire ecology, particularly in the context of massively increased levels of planned burning currently being implemented in Victoria.
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Campbell, Lachlan. "Wimmera River (Victoria, Australia) – Increasing Use of a Diminishing Resource." Water Science and Technology 21, no. 2 (February 1, 1989): 245–49. http://dx.doi.org/10.2166/wst.1989.0058.
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The Wimmera River is central western Victoria's most important river, rising in the Grampians National Park, filling storages that supply the major water supply to the vast Wimmera and Mallee regions. It passes through the Little Desert National Park, an area of significant scenic, recreation, historical and conservation value and terminates in Victoria's largest inland freshwater lakes (Lakes Hindmarsh and Albacutya). The brittleness of the whole closed Wimmera River system, and the over committal of the water resources was brought to the public's attention when appeals were lodged against the proposal to licence a discharge of high standard secondary effluent from an extended aeration oxidation ditch and lagoon treatment facility at Horsham. Residents, user and community groups, Municipal Councils and Government Departments, aware of the deterioration of the Wimmera River had somewhere to focus their attention. Victoria's and possibly Australia's longest environmental appeal, lasting twenty-five days, and a State Environment Protection Policy, determined that all major point sources of nutrients should be removed from the River. More resources for clearing of unwanted emergent weeds, more facilities for protection of Crown Land and catchments generally, and the implementation of environmental summer flows as piping of the Wimmera-Mallee Stock and Domestic System proceeds, are all required. A River Management Board with strength, wealth, good public relations and a dedication to the task could make the Wimmera River an example for all Australia and a tourist attraction of immense value to the region.
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Griffiths, Tom. "How many trees make a forest? Cultural debates about vegetation change in Australia." Australian Journal of Botany 50, no. 4 (2002): 375. http://dx.doi.org/10.1071/bt01046.
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Environmental history, as it has emerged in recent years, is most distinctive in the way it illustrates a serious engagement between the disciplines of ecology and history. This article begins with an exploration of the lineage and promise of environmental history, particularly in the Australian setting. It then analyses a number of the cultural debates about vegetation change in Australia—about clearing, open landscapes, scrub encroachment and burning practices—and draws attention to the way that morals, politics and aesthetics shaped environmental perception and still do. Clearing was the dominant discourse in the history of landscape change and a legislative requirement for secure settlement. At the same time, criticism of clearing and its effects represented an early conservationist sensibility, but the heroic pioneering labour of clearing, the political imperatives associated with it and the escalating ecological legacy it generated, have sometimes made us forget how open was much of the Australian landscape when Europeans first arrived. The morality of clearing—the arguments for and against—focused the minds of settlers on the trees and the loss of them, while the aesthetics of pastoralism attracted their eyes to the grasslands and made them rejoice in the curious legacy of 'open' landscapes. In the early nineteenth century, the most common usage of the word 'forest' was to describe land fit to graze: 'according to the local distinction, the grass is the discriminating character [of forest land] and not the Trees'. At the same time, pastoralists were unwilling to recognise the role of Aboriginal people in creating such open landscapes and this reticence to acknowledge the Aboriginality of the pastoral economy persists today. This in turn affected the way settlers perceived the new forests that appeared after European invasion. The fate of the vegetation Europeans found has understandably been so much the focus of science and history—its removal, replacement, utilisation, modification and conservation—that 'new forests' easily escape scholarly attention; and being new, they seem far less valuable and threatened. They have generally been perceived as a nuisance, as enclosing and encroaching, as 'scrub', as 'woody weeds'. The politics of understanding regrowth are related not only to the issues of clearing and density, but especially to the culture of burning in Aboriginal and settler society and its implications for management and biodiversity. If the coming together of ecology and history best defines the new 'environmental history', then the most illuminating confluences are those where each discipline helps the other to identify what constitutes a unique 'event', both ecologically and historically. The article therefore finishes with examples of events in two landscapes—the long drought of the 1890s in western New South Wales and the Black Friday bushfires of 1939 in the mountain ash forests of Victoria—to illustrate how each emerges as an intriguing artefact of nature and history, a cultural exaggeration of a natural rhythm. Even as we discover the ecological depth of each apparently 'natural' event, we are reminded of its historical specificity.
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Aouad, Andrew, Randall Taylor, Neil Millar, Robert Meagher, and Deidre Brooks. "Seismic on the edge—the Speculant 3D Transition Zone Seismic Survey." APPEA Journal 52, no. 1 (2012): 327. http://dx.doi.org/10.1071/aj11025.
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The Speculant 3D Transition Zone (TZ) Seismic Survey was acquired by Origin Energy in the Otway Basin, about 30 km east of Warrnambool, Victoria, during November and December 2010. The objective of the survey was to fill a data gap between existing marine and land 3D seismic surveys. Although the survey covered a small surface area, it included part of the Bay of Islands Coastal Park, dairy farms, southern rock lobster fishing grounds and the migration route for the Southern Right Whale. Numerous exclusion zones were required to address a variety of stakeholder concerns, avoid environmentally sensitive areas, combat a physical landscape dominated by 60 m sea cliffs and the large Southern Ocean surf. These access restrictions required the innovative use of modern seismic technology to enable a survey that could simultaneously record onshore and offshore without a physical connection between recording systems. On land a GSR cable-free recording system was used for the first time in Australia, eliminating the need for any line preparation or vegetation clearing. Offshore an ocean bottom cable system was used. The survey employed smaller sources than traditionally used in the region. A 900 in3 generator–injector airgun array was used offshore while a single Vibroseis unit was used on land. This paper shares the lessons learnt during the planning, approval and acquisition of the Speculant Seismic Survey with the steps taken to reduce the operation’s footprint while maintaining data quality.
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Hoppe, Kirk Arden. "Lords of the fly: colonial visions and revisions of African sleeping-sickness environments on Ugandan Lake Victoria, 1906–61." Africa 67, no. 1 (January 1997): 86–105. http://dx.doi.org/10.2307/1161271.
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Sleeping-sickness control in southern Uganda created ideological openings for the articulation of colonial visions of African environments. Competing colonial agendas, Ugandans' positions in their own environments, and Ugandans' resistance and responses to colonial schemes determined how such visions played themselves out in practice. The emerging power of colonial science played an important role in colonial attempts at constructing nature and defining Africans' relationship with their environments through disease control. The combination of forced depopulations, strategic clearings, and planned resettlement in British sleeping-sickness control schemes in southern Uganda set in motion a cycle of long-term land alienation from 1906 to 1962 that reflected the particular relations between British science, environmental intervention, and colonisation.
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Zimmer, Heidi C., Vivienne B. Turner, Jaimie Mavromihalis, Josh Dorrough, and Claire Moxham. "Forb responses to grazing and rest management in a critically endangered Australian native grassland ecosystem." Rangeland Journal 32, no. 2 (2010): 187. http://dx.doi.org/10.1071/rj09069.
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Worldwide, temperate grasslands have been extensively cleared for agriculture and urban expansion and the ‘Natural Temperate Grassland of the Victorian Volcanic Plain’ in south-eastern Australia has recently been listed as critically endangered. Because of land clearing, these grasslands now occupy <1% of their original distribution and much of the remaining grassland continues to be grazed by livestock. Although forbs (wildflowers) constitute most of the floristic richness in natural grasslands, few experimental studies have focused on their responses to strategic livestock grazing and rest. This paper reports on the outcomes of five grazing and rest management regimes imposed for 4 years at three sites on the Victorian Volcanic Plain. Seasonal grazing and rest management regimes resulted in significantly different native and exotic forb frequencies, but not richness. Native perennial and exotic annual forb frequency was higher when management incorporated grazing and rest periods (14 and 16% deviance explained), particularly with spring rest from grazing. However, the most important influence on native perennial and exotic annual and perennial forb frequency (46, 58 and 41% deviance explained) and native perennial and exotic annual species richness (62 and 35% deviance explained) was site. Differences among the three sites included soil, rainfall, size of remnant, presence of small burrowing mammals, management history and consequent species assemblages. Despite differences among sites, the results indicate that native perennial forb frequency may be increased using management regimes that incorporate both grazing and rest. However, targeted management may be necessary to reduce exotic annual forbs, also promoted by grazing with seasonal rest.
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Brown, Geoff W., Andrew F. Bennett, and Joanne M. Potts. "Regional faunal decline - reptile occurrence in fragmented rural landscapes of south-eastern Australia." Wildlife Research 35, no. 1 (2008): 8. http://dx.doi.org/10.1071/wr07010.
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Many species of reptiles are sedentary and depend on ground-layer habitats, suggesting that they may be particularly vulnerable to landscape changes that result in isolation or degradation of native vegetation. We investigated patterns of reptile distribution and abundance in remnant woodland across the Victorian Riverina, south-eastern Australia, a bioregion highly modified (>90%) by clearing for agriculture. Reptiles were intensively surveyed by pitfall trapping and censuses at 60 sites, stratified to sample small (<30 ha) and large (>30 ha) remnants, and linear strips of roadside and streamside vegetation, across the regional environmental gradient. The recorded assemblage of 21 species was characterised by low abundance and patchy distribution of species. Reptiles were not recorded by either survey technique at 22% of sites and at a further 10% only a single individual was detected. More than half (53%) of all records were of two widespread, generalist skink species. Multivariate models showed that the distribution of reptiles is influenced by factors operating at several levels. The environmental gradient exerts a strong influence, with increasing species richness and numbers of individuals from east (moister, higher elevation) to west (drier, lower elevation). Differences existed between types of remnants, with roadside vegetation standing out as important; this probably reflects greater structural heterogeneity of ground and shrub strata than in remnants subject to grazing by stock. Although comparative historical data are lacking, we argue that there has been a region-wide decline in the status of reptiles in the Victorian Riverina involving: (1) overall population decline commensurate with loss of >90% of native vegetation; (2) disproportionate decline of grassy dry woodlands and their fauna (cf. floodplains); and (3) changes to populations and assemblages in surviving remnants due to effects of land-use on reptile habitats. Many species now occur as disjunct populations, vulnerable to changing land-use. The status of reptiles in rural Australia warrants greater attention than has been given to date. Effective conservation of this component of the biota requires better understanding of the population dynamics, habitat use and dispersal capacity of species; and a commitment to landscape restoration coupled with effective ecological monitoring.
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Umeghalu, ICE. "AGRICULTURAL LAND CLEARING IS IMPERATIVE FOR A SUCCESSFUL AGRICULTURAL MECHANIZATION PROGRAM IN NIGERIA." Agrobiological Records 10 (2022): 42–50. http://dx.doi.org/10.47278/journal.abr/2022.025.
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The rapid increase in population in Nigeria calls for an increase in agricultural production. Farming commences with land clearing. Traditionally, the manual land clearing method is still predominant in Nigeria, where the matchet, hoe and axe are the implement used for the operation. However, this land clearing method can no longer keep pace with the population explosion. The method is ideal for small areas of land with small trees and stumps when surplus labor is available; however, the manual method becomes tedious and costly for mechanized farming. Agricultural land clearing involves removal of natural vegetation from the land, stumping, mechanized tree knockdown, windrowing, wood-cutting and burning, removal of debris and pioneer plowing. The soil structures, crop nutrients, and soil moisturizing content crops need to grow are in the topsoil. Therefore, agricultural land clearing operations should aim at minimum topsoil disturbance-poorly cleared land results in poor yield and frequent damage to agricultural machines and equipment. To achieve adequate agricultural land clearing, special techniques, machines, tools, experienced machine operators, and adequate timing of land clearing operations are necessary. This review aims to offer information on adequate methods of agricultural land clearing, outlining the procedures to be followed, tools to employ and good timing for carrying out various stages of land clearing operations in different agricultural zones of Nigeria. Parameter for assessing good agricultural land clearing is also discussed.
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Finn, Hugh C., and Nahiid S. Stephens. "The invisible harm: land clearing is an issue of animal welfare." Wildlife Research 44, no. 5 (2017): 377. http://dx.doi.org/10.1071/wr17018.
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Land clearing is a significant environmental issue in Australia and an area of active legislative reform. Despite evidence of the harm that land clearing causes to individual animals, such harm is either ignored or considered only indirectly in environmental decision-making. We argue that the harm that land clearing causes to animals ought to be identified and evaluated in decision-making relating to land clearing and consider the following three propositions in support: (1) land clearing causes deaths that are physically painful and psychologically distressing because of their traumatic and debilitating nature; (2) land clearing causes physical injuries, other pathological conditions, pain and psychological distress over a prolonged period as animals attempt to survive in the cleared environment or in the environments they are displaced to; and (3) on the basis of current clearing rates, more than 50million mammals, birds and reptiles are likely to be killed annually because of land clearing in Queensland and New South Wales. The scientific consensus about the harm caused by land clearing means that decisions to allow land clearing are decisions to allow most of the animals present to be killed and, as such, frameworks for decision-making ought to include proper evaluation of the harm to be imposed.
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Levis, Larry. "The Clearing of the Land." Missouri Review 13, no. 3 (1991): 176–77. http://dx.doi.org/10.1353/mis.1991.0133.
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Reside, April E., Jutta Beher, Anita J. Cosgrove, Megan C. Evans, Leonie Seabrook, Jennifer L. Silcock, Amelia S. Wenger, and Martine Maron. "Ecological consequences of land clearing and policy reform in Queensland." Pacific Conservation Biology 23, no. 3 (2017): 219. http://dx.doi.org/10.1071/pc17001.
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Land clearing threatens biodiversity, impairs the functioning of terrestrial, freshwater, and marine ecosystems, and is a key contributor to human-induced climate change. The rates of land clearing in the State of Queensland, Australia, are at globally significant levels, and have been the subject of intense and polarised political debate. In 2016, a legislative bill that aimed to restore stronger controls over land clearing failed to pass in the Queensland Parliament, despite the clear scientific basis for policy reform. Here, we provide a short history of the recent policy debate over land clearing in Queensland, in the context of its global and national ecological significance. Land clearing affects regional climates, leading to hotter, drier climates that will impact on the Queensland economy and local communities. Loss of habitat from land clearing is a key threatening process for many endangered animals and plants. Runoff from land clearing results in sediment and nutrient enrichment, which threatens the health of the Great Barrier Reef. Australia has made national and international commitments to conserve biodiversity and reduce our greenhouse gas emissions, but current land clearing policies are not consistent with these commitments. Stronger regulation is needed to reduce vegetation loss, such as target-based regulation, which sets a cap on land clearing and could effectively halt vegetation loss over the long term. Lasting policy reform is required, and we recommend an effective policy mix that restricts clearing, provides economic opportunities for vegetation retention, and informs the Australian community about the value of native vegetation.
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Lawes, M. J., R. Greiner, I. A. Leiper, R. Ninnis, D. Pearson, and G. Boggs. "The effects of a moratorium on land-clearing in the Douglas-Daly region, Northern Territory, Australia." Rangeland Journal 37, no. 4 (2015): 399. http://dx.doi.org/10.1071/rj15014.
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Land-clearing represents the first step in agricultural development and signals a shift in landscape function towards provisioning ecosystem services, in particular food production. In the process, other types of ecosystem services are often unintentionally lost as illustrated by the associated decline in biodiversity, increased soil erosion and emission of greenhouse gases. In 2003, the Northern Territory state government in Australia promulgated a moratorium on the clearing of native vegetation on freehold land in the Douglas-Daly river catchment, an area experiencing increasing pressure from agricultural development. The moratorium was intended to limit the rate and extent of land-clearing for a period of time so that informed policy could be concurrently developed to guide future land-clearing and minimise negative impacts. Under the moratorium, land-clearing required a permit and had to conform to broad guidelines; clearing was confined to freehold land, was prohibited in close proximity to wetlands, rivers and rainforest to safeguard water quality, and there were prescribed limits on percentages cleared by property, vegetation type, sub-catchment, and the whole catchment. Remotely sensed data (1977–2011) were used to explore the effectiveness of the moratorium. The analysis shows that, during moratorium years (2002–2009), clearing rates accelerated rather than slowed in the moratorium area and was mostly (81%) conducted without the required permits. The extent of land cleared after the moratorium was declared, and the fallow nature of some of this land a decade later, suggests that much of the land-clearing may have been completed in anticipation of stricter future controls. The moratorium failed because it was not formally legislated and was too broadly defined. Consequently, the non-binding nature of the land-clearing guidelines, and the absence of systematic monitoring of land cover change or penalties for clearing land without a permit, led to uninformed and uncontrolled clearing. This paper demonstrates that effective policy is only as good as its level of implementation.
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Marpaung, David Septian Sumanto, Nova Anika, and Yazid Bindar. "Effect of Land Clearing Activity on Environmental and Arthropods Diversity (Case Study: Jati Agung, Lampung)." Jurnal Ilmu Lingkungan 19, no. 2 (July 10, 2021): 444–49. http://dx.doi.org/10.14710/jil.19.2.444-449.
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Agricultural activity relies on soil as their growth media. Besides agricultural activity, other living species also needs soil as their ecosystem. However, the biodiversity and environmental factor are often neglected in agricultural activity. Therefore, the investigation of environmental and biodiversity changes is important. In this study, the environmental parameter and biodiversity changes was investigated in area after land clearing activity. The pH was increased from in 3 times measurement. Besides, the soil temperature and air temperature was also increased in 3 times measurement between pre- and post-treatment. The soil temperature ranges from 26.2 oC to 33.2 oC in pre-treatment and 27.6 oC to 31.8 oC in post-treatment. The air temperature was observed ranges from 27.96 oC to 34.3 oC in pre-treatment and 28.36 oC to 34.56 oC in post-treatment. Measurement of RH was resulted ranges from 61.2% to 75.4% in pre-treatment and 61.4% to 74.8% in pre-treatment. The land is proposed become paddy field for next step land processing. As result, the diversity index was decreased in pre- and post-treatment. The Shannon diversity index was decreased from 0.81 to 0.72. Similarly, the Simpson diversity index was also decreased from 1.94 to 1.77. Meanwhile, the evenness index was increased from 0.58 to 0.65. These results suggested for farmer to process the land as soon as possible after land clearing process, if they want to form paddy field from pasture land.AbstrakKegiatan pertanian bergantung pada tanah sebagai media tumbuh suatu tanaman. Selain kegiatan pertanian, organisme hidup lain juga bergantung terhadap tanah sebagai ekosistem. Namun, seringkali biodiversitas dan faktor lingkungan diabaikan dalam kegiatan pertanian. Oleh karenanya, indentifikasi perubahan lingkungan dan biodiversitas sanget perlu dilakukan. Dalam penelitian ini, perubahan parameter lingkungan dan biodiversitas diamati sebelum dan sesudah aktivitas land clearing. Hasil pengamatan menunjukkan, pH tanah, suhu tanah dan suhu lingkungan meningkat dalam 3 kali pengukuran dari sebelum ke sesudah aktivitas land clearing. Suhu tanah berkisar 26.2 oC-33.2 oC pada sebelum kegiatan land clearing dan 27.6 oC-31.8 oC setelah aktivitas land clearing. Suhu lingkungan ditemukan berkisar 27.96 oC-34.3 oC pada kegiatan sebelum land clearing dan 28.36 oC-34.56 oC setelah kegiatan land clearing. Hasil pengukuran RH lingkungan ditemukan berkisar 61.2%-75.4% pada kegiatan sebelum land clearing dan 61.4%-74.8% setelah kegiatan land clearing. Sementara itu, index diversitas ditemukan menurun setelah aktivitas land clearing. Nilai Shannon diversity index ditemukan menurun setelah aktivitas land clearing dari 0.81-0.72. Pola serupa ditemukan pada nilai Simpson diversity index, dimana terjadi penurunan dari 1.94 menjadi 1.77. Nilai evenness index meningkat dari 0.58 menjadi 0.65. Berdasarkan hasil tersebut dapat disarankan ke petani untuk segera mengolah lahan tersebut setelah kegiatan land clearing untuk menghindari terjadinya pertumbuhan kembali vegetasi, serta perubahan parameter lingkungan dan biodiversitas.
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Ayunda, D., D. A. Hutajulu, D. Cahyana, I. Ma’ruf, Habibi, M. Faisal, M. P. Wiranatha, et al. "Land clearing area prioritization using GLAD alert data to prevent peat fires in South Sumatera, Indonesia." IOP Conference Series: Earth and Environmental Science 1025, no. 1 (May 1, 2022): 012009. http://dx.doi.org/10.1088/1755-1315/1025/1/012009.
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Abstract Peatland clearing and draining are associated with many peat fires in South Sumatera. In 2020 we developed prioritization of peat land clearing areas using GLAD alert data to prevent catastrophic peat fires. GLAD alert data is near real-time alerting system that detects loss of trees, produced by University of Maryland and Global Forest Watch. This research aims to get prioritized area indicating land clearing and to test its reliability to prevent peat fires in South Sumatra. A total of 634 cluster areas indicating peatland clearing were found in between July and September 2020, which 20 of those cluster areas are selected for validation (ground truth). Validation was conducted by field survey and flying Unmanned Aerial Vehicle (UAV) in 3 districts, namely Musi Rawas Utara, Banyuasin, and Ogan Komering Ilir. The survey confirmed that 19 clusters experienced forest fires, land clearing, and rejuvenation of plantation. Meanwhile, the others became savanna from previous forest fires and former land clearing by burning. Prioritization areas using GLAD alert data was capable to detect land clearing, but further study is needed to predict peat fires due to peatland clearing.
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Widarti, Sri, Donna Youlla, and Icuk Setiawan. "PERSEPSI PETANI TERHADAP PEMBUKAAN LAHAN TANPA PEMBAKARAN (PLTB) DI KELURAHAN SAGATANI KECAMATAN SINGKAWANG SELATAN." ZIRAA'AH MAJALAH ILMIAH PERTANIAN 47, no. 1 (January 24, 2022): 63. http://dx.doi.org/10.31602/zmip.v47i1.5862.
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People's perceptions of land clearing by burning are still diverse, there are pros and cons about it. As we all know, the land clearing system by slashing and burning is a heritage and culture of farming communities in almost all parts of Indonesia, one of them is the people of the island of Kalimantan. Several solutions have been proposed by the government, including land clearing without burning (PLTB). This program aims to change the behavior of Indonesian farmers who still do land clearing by burning to switch to more environmentally friendly land clearing methods, including converting slashes into compost and wood vinegar. However, until now several programs launched by the government in order to minimize the forest and land fires have not been successful. Increasing the production of hybrid corn commodities is one of the targets for increasing agricultural productivity in West Kalimantan, especially in Singkawang in meeting the demand for hybrid corn which is currently supplied from outside the city. The increase in production cannot be separated from the need for expansion of hybrid corn farming land, which currently the number and focus of increasing hybrid corn farming businesses are in Sagatani Village, South Singkawang District. Problems arise when in their business, hybrid corn farmers in Sagatani Village still use conventional methods in cleaning and clearing land, namely by burning.
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Ford, GW, JJ Martin, P. Rengasamy, SC Boucher, and A. Ellington. "Soil sodicity in Victoria." Soil Research 31, no. 6 (1993): 869. http://dx.doi.org/10.1071/sr9930869.
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This paper gives a broad overview of the distribution and agricultural importance of sodic soils in Victoria. Sodic soils are estimated to occupy at least 13.4 Mha, representing at least 73% of Victoria's agricultural land. Most of this land is used for dryland farming; about 85% of the cropped land and 66% of the land sown to dryland pastures occurs on sodic soils. The largest sodicity class is 'alkaline sodic', dominated by a diverse range of soils (red duplex, yellow duplex, calcareous earths and self-mulching cracking clays). Alkaline sodic soils comprise half of the total agricultural land area, or about 24% of the area of land currently used for dryland cropping and 21% of the land under sown pasture. Land degradation problems are recognized as affecting most agricultural land in Victoria, and to be substantially limiting its productivity. The nature, extent and severity of the various forms of land degradation are a consequence of both intrinsic soil properties and of management practices. There is an urgent need to improve current farming practices to prevent further deterioration of the soil resource. Existing knowledge of the behaviour of sodic soils under both dryland and irrigated agriculture is reviewed. It is concluded that substantial gains in productivity are possible, but will require effective collaboration between soil scientists, agronomists, and land managers. Collation and integration of current knowledge on the properties and management of sodic soils in Victoria, and the acquisition of additional relevant information by targeted long-term research is required. Key issues for future research are identified.
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Untari, Edy H. P. Melmambessy, and David Oscar Simatupang. "Carbon Emissions And Mitigation Actions In Merauke." E3S Web of Conferences 73 (2018): 02009. http://dx.doi.org/10.1051/e3sconf/20187302009.
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Merauke district is one of the areas developing still need clearing land required for the expansion of farming land, Plantations and land clearing to a new settlement.Using forward looking method, Clearing land for the benefit of development produce carbon emissions. Carbon emissions 2014 to 2025 of 40.4 million tons CO2-eq with a total emission clean 20.7 tons CO2-eq. While carbon emissions Merauke in 2030 decreased to 37.3 million tons CO2-eq with a total emission clean of 15.4 million tons CO2-eq. To reduce carbon emissions, Merauke do 6 action plan mitigation in unit agricultural planning wetlands and agriculture dry land, production forest, natural heritage land, an absorbing area, mangrove forests and plantation.The carbon emissions reduction in 2030 namely 15.41 % equivalent to 51.5 million tons CO2-eq decline emissions from 6 mitigation action.
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Bogne, Allan G. "Clearing Land: Legacies of the American Farm." Agricultural History 80, no. 1 (January 1, 2006): 120–21. http://dx.doi.org/10.1215/00021482-80.1.120.
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Luizão, Flávio, Pamela Matson, Gerald Livingston, Regina Luizão, and Peter Vitousek. "Nitrous oxide flux following tropical land clearing." Global Biogeochemical Cycles 3, no. 3 (September 1989): 281–85. http://dx.doi.org/10.1029/gb003i003p00281.
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&NA;. "Land Clearing and Development in the Tropics." Soil Science 147, no. 5 (May 1989): 385. http://dx.doi.org/10.1097/00010694-198905000-00011.
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Hahn, S. K. "Land clearing and development in the tropics." Agriculture, Ecosystems & Environment 18, no. 4 (April 1987): 382–83. http://dx.doi.org/10.1016/0167-8809(87)90102-2.
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Myers, Norman. "Land clearing and development in the tropics." Forest Ecology and Management 20, no. 3-4 (August 1987): 321. http://dx.doi.org/10.1016/0378-1127(87)90088-0.
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Fargione, J., J. Hill, D. Tilman, S. Polasky, and P. Hawthorne. "Land Clearing and the Biofuel Carbon Debt." Science 319, no. 5867 (February 29, 2008): 1235–38. http://dx.doi.org/10.1126/science.1152747.
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Helviani, H., and H. Husnaeni. "The Role of Customary Leaders on the Decision Making Process in the Ethics of Land Clearing and Harvesting Process in Rice Farmers in Puday Village, Wonggeduku Barat Sub-District, Konawe District." Agrotech Journal 3, no. 2 (December 28, 2018): 87–92. http://dx.doi.org/10.31327/atj.v3i2.817.
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Customary leaders have dominant roles and influences, these facts are shown in the land clearing process (monahundau) and the harvesting process (meolu) of paddy rice crop. These processes begin with the opening ceremony or in the form of a small ritual carried out by customary leader numbering one person called Puusaraormandaranosara. The purpose of this study is to find out how the role of customary leaders in decision-making in the ethics of land clearing and harvesting processes in paddy rice farmers. Analysis of the data used in the form of qualitative descriptive analysis, where the data obtained is then described qualitatively using the Miles and Huberman model which consists of three stages, namely (1) Data Reduction, (2) Data Presentation, (3) Conclusion Drawing / Verification. The results of this study indicated that land clearing (monahundau) and the harvesting process (meolu) were influenced by hereditary customs in Puday Village, Wonggeduku Barat Sub-District, Konawe District. Monahundau is a land clearing process which is the first step to open a new planting season every year. Meoluis a harvesting process that is carried out in the same steps as the process of land clearing (observation, reciting intentions and praying silently for the best wishes desired in the harvesting process), and the final step is done by investigating at the rice fields who first turned yellow (ripe), then the rice fields that will be harvested first, the rice begins to be harvested when there is already a statement then the other farmers' land that has yellowed (ripe) may be harvested by themselves (meoludowo). Customary leaders are people chosen by the people of Puday village (puusaraormandaranosara) and have an influnce on decision making in the process of land clearing (monahundau) andharvesting (meolu)
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Rocchi, S., and J. L. Smellie. "Chapter 5.1b Northern Victoria Land: petrology." Geological Society, London, Memoirs 55, no. 1 (2021): 383–413. http://dx.doi.org/10.1144/m55-2019-19.
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AbstractCenozoic magmatic rocks related to the West Antarctic Rift System crop out right across Antarctica, in Victoria Land, Marie Byrd Land and into Ellsworth Land. Northern Victoria Land, located at the northwestern tip of the western rift shoulder, is unique in hosting the longest record of the rift-related igneous activity: plutonic rocks and cogenetic dyke swarms cover the time span fromc.50 to 20 Ma, and volcanic rocks are recorded from 15 Ma to the present. The origin of the entire igneous suite is debated; nevertheless, the combination of geochemical and isotopic data with the regional tectonic history supports a model with no role for a mantle plume. Amagmatic extension during the Cretaceous generated an autometasomatized mantle source that, during Eocene–present activity, produced magma by small degrees of melting induced by the transtensional activity of translithospheric fault systems. The emplacement of Eocene–Oligocene plutons and dyke swarms was focused along these fault systems. Conversely, the location of the mid-Miocene–present volcanoes is governed by lithospheric necking along the Ross Sea coast for the largest volcanic edifices; while inland, smaller central volcanoes and scoria cones are related to the establishment of magma chambers in thicker crust.
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Smellie, John L., and Sergio Rocchi. "Chapter 5.1a Northern Victoria Land: volcanology." Geological Society, London, Memoirs 55, no. 1 (2021): 347–81. http://dx.doi.org/10.1144/m55-2018-60.
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AbstractNeogene volcanism is widespread in northern Victoria Land, and is part of the McMurdo Volcanic Group. It is characterized by multiple coalesced shield volcanoes but includes a few relatively small stratovolcanoes. Two volcanic provinces are defined (Hallett and Melbourne), with nine constituent volcanic fields. Multitudes of tiny monogenetic volcanic centres (mainly scoria cones) are also scattered across the region and are called the Northern Local Suite. The volcanism extends in age between middle Miocene (c.15 Ma) and present but most is <10 Ma. Two centres may still be active (Mount Melbourne and Mount Rittmann). It is alkaline, varying between basalt (basanite) and trachyte/rhyolite. There are also associated, geographically restricted, alkaline gabbro to granite plutons and dykes (Meander Intrusive Group) with mainly Eocene–Oligocene ages (52–18 Ma). The isotopic compositions of the plutons have been used to infer overall cooling of climate during the Eocene–Oligocene. The volcanic sequences are overwhelmingly glaciovolcanic and are dominated by ‘a‘ā lava-fed deltas, the first to be described anywhere. They have been a major source of information on Mio-Pliocene glacial conditions and were used to establish that the thermal regime during glacial periods was polythermal, thus necessitating a change in the prevailing paradigm for ice-sheet evolution.
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Folco, L., P. Rochette, N. Perchiazzi, M. D'Orazio, M. A. Laurenzi, and M. Tiepolo. "Microtektites from Victoria Land Transantarctic Mountains." Geology 36, no. 4 (2008): 291. http://dx.doi.org/10.1130/g24528a.1.
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Smykla, Jerzy, Beata Krzewicka, Karina Wilk, Steven Emslie, and Lucyna Śliwa. "Additions to the lichen flora of Victoria Land, Antarctica." Polish Polar Research 32, no. 2 (January 1, 2011): 123–38. http://dx.doi.org/10.2478/v10183-011-0009-5.
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Additions to the lichen flora of Victoria Land, Antarctica Lichens of relict penguin colonies and sites affected by active penguin colonies were investigated in Victoria Land, Ross Sea sector, continental Antarctica. A total of 17 coastal sites, seven in northern and ten in southern Victoria Land, have been investigated across 7° of latitude from 71° to 78°S. Altogether 40 taxa of lichens have been identified. Four of the recorded species are new to the Antarctic - Caloplaca erecta, C. soropelta, C. tominii and Physcia tenella; two species are new to the Victoria Land area - Lecania nylanderiana and Lecanora polytropa. The first lichen records from Beaufort Island are also provided. Data presented here expand the knowledge on the occurrence, diversity and distribution of Victoria Land lichens.
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Rafki, Jon, Sukanda Husin, and Elwi Danil. "Eradication of Forest Fire and Land through the Application of Criminal Sanctions in Law No. 32 of 2009." International Journal of Multicultural and Multireligious Understanding 6, no. 4 (August 10, 2019): 42. http://dx.doi.org/10.18415/ijmmu.v6i4.963.
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Forest and land damage in Indonesia has reached 43 million hectares per year. In general, this is due to unsustainable large-scale exploitation and ecological insufficiency of forest resources for the purpose of harvesting forest products, clearing plantation land and for other purposes such as mining. The problem of forest and land damage as described above is exacerbated by forest and land burning activities as a result of land clearing through burning. The burning of this forest and land has caused smoke pollution, which contributes to global warming and climate change, which in turn has placed its own burden and disturbance on the forest ecosystem.
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Kaur, K., R. K. Jalota, D. J. Midmore, and J. Rolfe. "Pasture production in cleared and uncleared grazing systems of central Queensland, Australia." Rangeland Journal 27, no. 2 (2005): 143. http://dx.doi.org/10.1071/rj05012.
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Clearing land of trees and introducing exotic pastures to enhance pasture and cattle production and hence enterprise financial performance are widely practised in Queensland. The results from many previous studies on tree clearing have emphasised the gains in pasture production, but over periods of less than 10–15 years after clearing. The present study questioned the sustainability of pasture production in cleared systems over a longer time-frame (>10 years of clearing). For this, three different age groups of clearing i.e. 5 year, 11–13 year and 33 year were selected in each of 3 major types of tree communities i.e. Eucalyptus populnea, E. melanophloia and Acacia harpophylla in central Queensland. Paired comparisons of cleared and uncleared (intact) pasture systems were selected for each age group of clearing. The results suggest that the initial gains in pasture production upon clearing were compatible with published studies. However, for longer periods of time since clearing, the gains in pasture production were not sustained and were accompanied by risks of land degradation and loss of pasture plant diversity. For E. populnea and A. harpophylla, the maximum benefits from clearing were achieved at 13–15 years whereas for E. melanophloia, any benefits existed only over a short period of 5–6 years. The study emphasises that each tree community exhibits a specific response with regard to the duration of increased pasture production following clearing. To estimate the total benefits from tree clearing in pasture development, it is important to consider both monetary benefits and non-monetary losses from clearing for different types of tree communities.
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McAlpine, C., J. Syktus, and J. Ryan. "Climate change and land clearing: a short note." Australian Zoologist 35, no. 2 (January 2010): 431. http://dx.doi.org/10.7882/az.2010.028.
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Schons, Stella Z., Eirivelton Lima, Gregory S. Amacher, and Frank Merry. "Smallholder land clearing and the Forest Code in the Brazilian Amazon." Environment and Development Economics 24, no. 2 (January 30, 2019): 157–79. http://dx.doi.org/10.1017/s1355770x18000505.
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AbstractSmall landholders’ contribution to Amazon deforestation in Brazil has been persistent even after government actions have allowed a steep reduction in the overall annual deforestation area since 2004. We investigate land clearing and the incentives to comply versus not to comply with environmental legislation, allowing for selection into compliance or noncompliance due to unobserved perceptions of Forest Code enforcement. Our dynamic land clearing model is empirically tested through an endogenous switching regression method applied to data collected from households in the Transamazon-BR163 region between 2003 and 2014, when Forest Code enforcement supposedly increased. We show that smallholder compliance and noncompliance preferences lead to a selection problem that must be addressed in any land clearing behavior examination. We find that greater marginalization, longer land tenure and transitions to cattle grazing, but not agricultural rents, are major contributors to forest clearance and incentives not to comply with the Forest Code.
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van der Ree, Rodney, Todd R. Soderquist, and Andrew F. Bennett. "Home-range use by the brush-tailed phascogale (Phascogale tapoatafa) (Marsupialia) in high-quality, spatially limited habitat." Wildlife Research 28, no. 5 (2001): 517. http://dx.doi.org/10.1071/wr00051.
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Nine phascogales (7 females, 2 males) were radio-tracked between March and July 1999 to investigate the spatial organisation of this species in spatially limited habitat near Euroa, Victoria. In this area, approximately 3.6% of the original woodland vegetation remains after 150 years of agricultural clearing. Most wooded habitat is confined to narrow linear strips along roads and streams. However, these remnants are on fertile soils and, because they have not experienced intensive harvesting, the density of large old trees is over 10 times that found in nearby State Forests and Parks. Female phascogales were monitored for 13–38 days over periods of 5–15 weeks. The size of home ranges of females was 2.3–8.0 ha, and averaged 5.0 ha. This value is one-eighth the mean home-range size previously recorded for the species in contiguous forest in Victoria. All individuals used multiple nest trees, with nests generally located in trees >80 cm diameter at breast height. Although fragmented and spatially limited, the stands of large old trees on productive soils near Euroa provide a network of well connected, high-quality habitat for phascogales. The relatively dense population of phascogales in these remnants suggests that prior to agricultural clearing and timber harvesting, phascogales may have been much more common in Victoria than at present.
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Adams, Byron J., Richard D. Bardgett, Edward Ayres, Diana H. Wall, Jackie Aislabie, Stuart Bamforth, Roberto Bargagli, et al. "Diversity and distribution of Victoria Land biota." Soil Biology and Biochemistry 38, no. 10 (October 2006): 3003–18. http://dx.doi.org/10.1016/j.soilbio.2006.04.030.
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Barrett, J. E., R. A. Virginia, D. W. Hopkins, J. Aislabie, R. Bargagli, J. G. Bockheim, I. B. Campbell, et al. "Terrestrial ecosystem processes of Victoria Land, Antarctica." Soil Biology and Biochemistry 38, no. 10 (October 2006): 3019–34. http://dx.doi.org/10.1016/j.soilbio.2006.04.041.
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Pondrelli, S., and R. Azzara. "Upper Mantle Anisotropy in Victoria Land (Antarctica)." Pure and Applied Geophysics 151, no. 2-4 (March 1, 1998): 433–42. http://dx.doi.org/10.1007/s000240050121.
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Pratiwi, D. I., B. Saktiawan, T. Risfandy, and M. J. S. Toro. "Illegal land clearing and green economy campaign in Indonesia." IOP Conference Series: Earth and Environmental Science 905, no. 1 (November 1, 2021): 012141. http://dx.doi.org/10.1088/1755-1315/905/1/012141.
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Abstract Indonesia’s total area of forest and waters is around 130.68 million hectares, but it consistently decreases yearly. The illegal land clearing for agricultural activity is considered as the main cause of the forest reduction, as around 5.6 million hectares of land burned between 2015 and 201 and it costs of hundreds of trillions to the country. In order to lessen the negative impacts of land clearing, Indonesian government indeed has started to promote a green economy campaign, known as sustainable development with an environmental perspective. This study aims to examine the relationship between illegal land clearing and its effect on the Indonesian economy and its relationship with the green economy campaign initiated by the Indonesian government. We use the data from the Indonesian Ministry of Environment and Forestry, Central Bureau of Statistics, Greenpeace Indonesia, and World Bank to analyze this issue. We find that the governments’ poor regulation and monitoring have caused forest and land fires almost every year and it has huge economic and environmental costs that should be paid by the government. Therefore, a strong law enforcement is needed so that the green economy campaign in Indonesia can be executed properly.
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De Domenico, Francesca, Mariachiara Chiantore, Sabrina Buongiovanni, Maria Paola Ferranti, Serena Ghione, Simon Thrush, Vonda Cummings, Judi Hewitt, Kerstin Kroeger, and Riccardo Cattaneo-Vietti. "Latitude versus local effects on echinoderm assemblages along the Victoria Land coast, Ross Sea, Antarctica." Antarctic Science 18, no. 4 (November 14, 2006): 655–62. http://dx.doi.org/10.1017/s095410200600068x.
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Data from two new cruises is used to assess whether latitude plays any role in influencing broad-scale spatial patterns in echinoderm assemblage composition along the Victoria Land coast and the Balleny Islands as a contribution to the Latitudinal Gradient Project. Our results indicate that a latitudinal gradient is influencing assemblage structure in subtle and non-linear ways. The Balleny Islands system is different from the Victoria Land coast, probably because of a different biogeographic origin and current oceanographic conditions. Along the Victoria Land coast, latitude related differences arise when taking into account benthic biodiversity at different spatial scales. Alpha diversity increases from north to south, but beta diversity shows the opposite trend, although not linearly, suggesting the different importance of the iceberg disturbance along the northern Victoria Land coast.
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GOLDIN, ALAN, and L. M. LAVKULICH. "EFFECTS OF HISTORICAL LAND CLEARING ON ORGANIC MATTER AND NITROGEN LEVELS IN SOILS OF THE FRASER LOWLAND OF BRITISH COLUMBIA, CANADA AND WASHINGTON, U.S.A." Canadian Journal of Soil Science 70, no. 4 (November 1, 1990): 583–92. http://dx.doi.org/10.4141/cjss90-061.
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Two soils derived from glacial deposits and one from alluvium were examined for changes in organic matter (OM) and nitrogen levels between 1943 and 1983 across the international boundary in the Fraser Lowland of western North America. Duplicate samples were collected from the upper 0.2 m from 60 randomly selected sites on the five land clearing periods (1943–1955, 1955–1966, 1966–1976, 1976–1983, uncleared) on each of three parent materials: glacial outwash, alluvium, and glacialmarine deposits in the United States and Canada. The land clearing periods were determined from medium scale aerial photographs taken in 1943, 1955, 1966, 1976, and 1983. Cultivation results in a 20% loss of OM after 35 yr on all soils. The largest loss is in the first 15 yr on all soils. Changes in N levels on the three parent materials is irregular. C:N narrows on all soils from about 15:1 to about 12:1. Key words: Organic matter, nitrogen, Fraser Lowland, land clearing, air photo interpretation, parent material
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Wulandari, Eka, and Ersa Tri Fitriasari. "Meta-Analisis Faktor Pendorong Aktivitas Antropogenik Terhadap Karakteristik Kebakaran Hutan dan Lahan Gambut di Indonesia." Kaganga:Jurnal Pendidikan Sejarah dan Riset Sosial Humaniora 5, no. 1 (June 14, 2022): 50–67. http://dx.doi.org/10.31539/kaganga.v5i1.3569.
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The purpose of this research is the use of land in managing the land and doing environmentally friendly treatment in clearing the land. The method that was carried out by meta-analysis with 175 journal articles related to forest and land fires in Indonesia was then identified to produce an inventory of data for meta-analysis. The results of the research through an independence test between the factors driving fires from anthropogenic activities and the characteristics of fires indicate that the factor of weak law enforcement and protection in land tenure is significantly related to the characteristics of fires. The conclusions from this research are that land use rights must be clear and fair, concession holders have managed their land well and provide sanctions for those who violate the applicable regulations and the importance of developing innovations in clearing and managing peatlands without burning according to needs and providing benefits. economy, especially for small farmers, thereby reducing vertical and horizontal conflicts.
Keywords: Land, Fire, Forest.
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Brunetti, Claudia, Henk Siepel, Peter Convey, Pietro Paolo Fanciulli, Francesco Nardi, and Antonio Carapelli. "Overlooked Species Diversity and Distribution in the Antarctic Mite Genus Stereotydeus." Diversity 13, no. 10 (October 19, 2021): 506. http://dx.doi.org/10.3390/d13100506.
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In the harsh Antarctic terrestrial ecosystems, invertebrates are currently confined to sparse and restricted ice free areas, where they have survived on multi-million-year timescales in refugia. The limited dispersal abilities of these invertebrate species, their specific habitat requirements, and the presence of geographical barriers can drastically reduce gene flow between populations, resulting in high genetic differentiation. On continental Antarctica, mites are one of the most diverse invertebrate groups. Recently, two new species of the free living prostigmatid mite genus Stereotydeus Berlese, 1901 were discovered, bringing the number of Antarctic and sub-Antarctic species of this genus up to 15, of which 7 occur along the coast of Victoria Land and in the Transantarctic Mountains. To examine the biodiversity of Stereotydeus spp., the present study combines phylogenetic, morphological and population genetic data of specimens collected from nine localities in Victoria Land. Genetically distinct intraspecific groups are spatially isolated in northern Victoria Land, while, for other species, the genetic haplogroups more often occur sympatrically in southern Victoria Land. We provide a new distribution map for the Stereotydeus species of Victoria Land, which will assist future decisions in matters of the protection and conservation of the unique Antarctic terrestrial fauna.
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Alegre, J. C., D. K. Cassel, and D. E. Bandy. "Reclamation of an Ultisol Damaged by Mechanical Land Clearing." Soil Science Society of America Journal 50, no. 4 (July 1986): 1026–31. http://dx.doi.org/10.2136/sssaj1986.03615995005000040038x.
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Bogue, Allan G. "Book Review: Clearing Land: Legacies of the American Farm." Agricultural History 80, no. 1 (January 2006): 120–21. http://dx.doi.org/10.1525/ah.2006.80.1.120.
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Etter, Andres, Clive McAlpine, Stuart Phinn, David Pullar, and Hugh Possingham. "Unplanned land clearing of Colombian rainforests: Spreading like disease?" Landscape and Urban Planning 77, no. 3 (August 2006): 240–54. http://dx.doi.org/10.1016/j.landurbplan.2005.03.002.
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Melville, Jane. "Conservation genetics of eastern Australian herpetofauna in a rapidly changing landscape: a perspective on conservation management and policy implementation." Pacific Conservation Biology 24, no. 3 (2018): 310. http://dx.doi.org/10.1071/pc18017.
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Over the last 200 years Australia has seen wide-scale habitat losses and land-clearing but in the last two decades the rate of loss has been accelerating dramatically, with intensification of land clearing and unprecedented urban growth around most of our major cities. It is within this framework of such rapid change that I have been undertaking conservation genetic research of lizards and frogs over the last 15 years. Here I reflect on the impacts of two rapidly changing landscapes that I have documented through my research. First, the profound impact of land clearing and shifting agricultural practices from mixed-cropping farms to vast broadacre monocultures on the grassland earless dragons of the Condamine River floodplains in south-eastern Queensland. Second, the rapid expansion of the Melbourne urban growth boundaries and how planning processes can impact the future survival of lizard and frog species within an urban environment. Both these cases highlight the impacts of rapid landscape change and emphasise the need for appropriate regulation and planning. Recommendations to slow the detrimental decline and potential extinction of these species include tighter land-clearing regulations and compliance monitoring, plus funding and integration of high-quality research into planning policy at early strategic stages. However, it is also vital that as conservation researchers we effectively communicate to the wider community our knowledge of the impacts that these landscape changes are having on our native flora and fauna.
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Brandão Jr., Amintas, Lisa Rausch, América Paz Durán, Ciniro Costa Jr., Seth A. Spawn, and Holly K. Gibbs. "Estimating the Potential for Conservation and Farming in the Amazon and Cerrado under Four Policy Scenarios." Sustainability 12, no. 3 (February 10, 2020): 1277. http://dx.doi.org/10.3390/su12031277.
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Since 2013, clearing rates have rapidly increased in the Amazon and Cerrado biomes. This acceleration has raised questions about the efficacy of current regional public and private conservation policies that seek to promote agricultural production while conserving remnants of natural vegetation. In this study, we assessed conservation and agricultural outcomes of four potential policy scenarios that represent perfect adherence to private sector, zero-deforestation commitments (i.e., the Amazon soy moratorium—ASM and the Amazon cattle agreements—CA) and to varying levels of implementation of the Brazilian Forest Code (FC). Under a zero-clearing scenario, we find that the extent of croplands as of 2017 within the two biomes (31 MHa) could double without further clearing if agriculture were to expand on all previously cleared land that is suitable for crops. Moreover, at least 47 MHa of land that is already cleared but unsuitable for crops would remain available for pasture. Under scenarios in which only legal clearing under the FC could occur, 51 MHa of additional natural vegetation could be cleared. This includes as many as 1 MHa of nonforest vegetation that could be cleared in the Amazon biome without triggering the ASM and CA monitoring systems. Two-thirds of the total vegetation vulnerable to legal clearing is located within the Cerrado biome, and 19 MHa of this land is suitable for cropland expansion. Legal clearing of all of these areas could reduce biodiversity persistence by 4% within the two biomes, when compared with the zero-clearing scenario, and release up to 9 PgCO2e, with the majority (75%) coming from the Cerrado biome. However, when we considered the potential outcomes of full implementation of the FC, we found that 22% (11 MHa) of the 51 MHa of vegetation subject to legal clearing could be protected through the environmental quotas market, while an additional 1 MHa should be replanted across the two biomes, predominantly in the Amazon biome (73% of the area subject to replanting). Together, quotas and replanting could prevent the release of 2 PgCO2e that would otherwise be emitted if all legal clearing occurred. Based on our results, we conclude that ongoing legal clearing could create additional space for cropland and cattle production beyond the substantial existing stocks of cleared areas but would significantly impair local carbon and biodiversity stocks.
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Barua, Shovon, Ian Cartwright, P. Evan Dresel, and Edoardo Daly. "Using multiple methods to investigate the effects of land-use changes on groundwater recharge in a semi-arid area." Hydrology and Earth System Sciences 25, no. 1 (January 5, 2021): 89–104. http://dx.doi.org/10.5194/hess-25-89-2021.
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Abstract. Understanding the applicability and uncertainties of methods for documenting recharge rates in semi-arid areas is important for assessing the successive effects of land-use changes and understanding groundwater systems. This study focuses on estimating groundwater recharge rates and understanding the impacts of land-use changes on recharge rates in a semi-arid area in southeast Australia. Two adjacent catchments were cleared ∼180 years ago following European settlement, and a eucalypt plantation forest was subsequently established ∼15 years ago in one of the catchments. Chloride mass balance analysis yields recharge rates of 0.2 to 61.6 mm yr−1 (typically up to 11.2 mm yr−1). The lower of these values probably represents recharge rates prior to land clearing, whereas the higher likely reflects recharge rates following the initial land clearing. The low pre-land-clearing recharge rates are consistent with the presence of old groundwater (residence times up to 24 700 years) and the moderate-to-low hydraulic conductivities (0.31 to 0.002 m d−1) of the aquifers. Recharge rates estimated from tritium activities and water table fluctuations reflect those following the initial land clearing. Recharge rates estimated using water table fluctuations (15 to 500 mm yr−1) are significantly higher than those estimated using tritium renewal rates (0.01 to 89 mm yr−1; typically <14.0 mm yr−1) and approach the long-term average annual rainfall (∼640 mm yr−1). These recharge rates are unrealistic given the estimated evapotranspiration rates of 500 to 600 mm yr−1 and the preservation of old groundwater in the catchments. It is likely that uncertainties in the specific yield results in the water table fluctuation method significantly overestimating recharge rates, and despite the land-use changes, the present-day recharge rates are relatively modest. These results are ultimately important for assessing the impacts of land-use changes and management of groundwater resources in semi-arid regions in Australia and elsewhere.