Showing results for: Deforestation
This paper presents maps of global land use change from 1992 to 2015, showing net increases in the area of agriculture, grassland and settlement, and net losses in the area of forest, wetland, shrubland, sparse land, bare land and water.
6.5–15.4 million hectares of private land in Brazil could become legally available for deforestation, because expansion in the land area designated as conservation units or indigenous reserves could trigger a legal mechanism whereby the area of legal reserves for native vegetation may be decreased.
WWF’s 2018 Living Planet Report finds that population sizes of thousands of vertebrate species have declined by 60%, on average, between 1970 and 2014, land degradation seriously impacts 75% of terrestrial ecosystems, and current species extinction rates are 100 to 1000 times higher than the background rate. The report attributes these impacts to rising demand for land, water and energy, and explores the impacts of agriculture, fisheries and deforestation.
The current front-runner for Brazil’s presidency, Jair Bolsonaro, member of the right-wing Social Liberal Party, proposes to abolish Brazil’s ministry of environment, hand control of agricultural policies to politicians who advocate reducing land conservation and expanding agricultural lands, withdraw Brazil from the Paris Agreement on climate change, and open indigenous lands to mining.
27% of global deforestation since 2001 has been caused by permanent land use change for producing commodities (such as beef, soy and palm oil), according to a recent paper. The researchers used satellite imagery to assess 10 km by 10 km grid cells across the globe and categorised each cell by likely forest disturbance type: commodity production, shifting agriculture, managed forestry, wildfire, or urbanisation.
The University of East Anglia’s Global Environmental Justice Group is running a five-week online course on “Environmental Justice”, hosted on the Future Learn website. Several food-relevant topics will be covered, including water justice, forest governance, biodiversity conservation, and climate justice.
The Global Partnership on Forest and Landscape Restoration’s report “Restoring forests and landscapes: the key to a sustainable future” presents case studies of the successful restoration of landscapes that have been affected by deforestation and land degradation.
Managing tropical forest conservation on the basis of maximising carbon storage might not protect the most biodiverse regions of forest, according to a recent paper. Using datasets from Brazil, the authors found that the correlation between biodiversity and levels of carbon stored in forests depended on whether and how the forest had been disturbed by human activity.
A recent paper assesses the carbon implications of converting Indonesian rainforests to oil palm monocultures, rubber monocultures or rubber agroforestry systems (known as “jungle rubber”). It finds that carbon losses are greatest from oil palm plantations and lowest from jungle rubber systems, in all cases being mainly from loss of aboveground carbon stocks. The paper points out that, “Thorough assessments of land-use impacts on resources such as biodiversity, nutrients, and water must complement this synthesis on C but are still not available.”
Trase - a partnership between the Stockholm Environment Institute and Global Canopy - has released the Trase Yearbook 2018, which presents the latest insights on the sustainability of global agricultural commodity supply chains associated with tropical deforestation: the focus this year is on soy. The Trase Yearbook highlights how just six companies account for 57% of Brazilian soy exports. Taken together, the supply chains of these six traders are associated with two-thirds of the total deforestation risk directly linked to soy expansion, the majority of it in the Cerrado, one of the world’s most biodiverse savannahs.
Tropical deforestation is nearing a critical point, beyond which the rate of forest fragmentation could increase much more rapidly than the rate of forest area loss, according to a study. Fragmentation can have negative effects on biodiversity and also increases carbon emissions beyond those from just the deforested areas, since trees are at greater risk of dying on the edges between forest and cleared land. The researchers predict that reforestation and a reduction in the rate of deforestation are both needed if fragmentation is to be reversed.
Frozen food supermarket Iceland has pledged to remove palm oil from all of its own-brand lines by the end of 2018, citing concerns over collapsing orangutan populations and deforestation. The initiative - the first of its kind among major UK supermarkets - should reduce demand for palm oil by over 500 tonnes a year.
A study shows that 100,000 orangutans in Borneo have been lost between 1999 and 2015 - around half of the population. The results show that this precipitous decrease is not just due to deforestation, since numbers of orangutans also declined in selectively logged and intact forests.
A report from the European Commission Directorate-General for the Environment reviews environmental, social and economic aspects of palm oil production and consumption, and evaluates existing palm oil sustainability initiatives.
This article presents the results from a new global soil erosion model, based on a combination of remote sensing, GIS modelling and census data. It finds that accelerated soil erosion due to land use change between 2001 and 2012 is a major threat to soil and future agriculture but that previous commonly used estimates of annual global soil erosion were twice too high. In comparison with previous studies which had a mapping resolution of around 10–60 km cell size, this model with its high-resolution 250m cell size has far greater predictive power than any previous model.
In this information note from the CGIAR programme on Climate change, Agriculture and Food security (CCAFS), researchers present a rough estimate of the proportion of global agricultural emissions that can be attributed to smallholder farmers in developing countries.