Novel tropical forests: response to global change. Organized Oral Session at the Ecological Society of America 2016, Fort Lauderdale, Florida, USA, August 2016 Warming climates in the twenty-first century are expected to push tropical ecosystems, which currently reside at the warm and wet edge of bioclimatic life zones, into novel states that have no analog on Earth today (Fig. 1).
Shifting precipitation patterns will expose some tropical forest regions to more frequent drought conditions that may reduce carbon (C) assimilation and lead to vegetation dieback, and all regions will experience higher temperatures never encountered by extant taxa. Degradation Surveys Completed – Tanzania's Coastal Forests.
Tanzanian botanists, William Kindeketa, Canisius Kayombo and Shaaban Shao have completed fieldwork to survey the extent of degradation in the coastal forests.
The team visited ten forests, collecting data from over 20 hectares. The forests included Chitoa, Litipo, Rondo, Mitarure, Ngarama North, Tong’omba, Kiwengoma, Ngumburuni, Mchungu, and Ruvu South. Living and cut trees were counted and measured to assess the level of timber extraction. Species and the amount of standing carbon was also recorded. The data will be analysed over the coming months to see if current levels of timber extraction are sustainable, or whether extraction has led to negative impacts on the forests’ natural capital. Croton sylvaticus Hochst. Combretum apiculatum Sond Arriving at Chitoa forest reserve. The Where and When and How of forest cover change in 5 infographics. Written by Nancy Harris, Rachael Petersen, Crystal Davis and Octavia Payne for Global Forest Watch Today, we have more data about forests than ever before, but we still can’t seem to agree on where, when and why forests are changing around the world.
Even two prominent global data sources appear to disagree, at least on the surface. “World deforestation slows down” was the headline of the 2015 Global Forest Resources Assessment (FRA) published by the United Nations Food and Agriculture Organization (FAO). In the same year, Global Forest Watch reported that “global annual tree cover loss remains high.” What gives? Tropical Dry Forest (english version) Imagining a Forest of the Future. British forest blights. Mapping the World’s Forests in Three Dimensions. By Michael Carlowicz Design by Robert Simmon January 9, 2012 Trees cool and moisten our air and fill it with oxygen.
They calm the winds and shade the land from sunlight. They shelter countless species, anchor the soil, and slow the movement of water. They provide food, fuel, medicines, and building materials for human activity. They also help balance Earth’s carbon budget. Can we grow our way out of carbon imbalance by making the landscape greener? Scientists estimate that humans release about nine billion tons of carbon (mostly carbon dioxide) each year by burning fossil fuels and by changing the landscape. Forests are considered one of the world’s largest banks for all of the carbon emitted into the atmosphere through natural processes and human activities. Forests cover 30 percent of the Earth’s land.
Did forests hold more or less carbon in the past? Eighty years after it was first cut, this forest in British Columbia still has not regained its former grandeur. History of American Forests: Tree maps made for 1884 census. The Vault is Slate's history blog.
Like us on Facebook, follow us on Twitter @slatevault, and find us on Tumblr. Find out more about what this space is all about here. These tree maps, commissioned by the United States Census and published in 1884, were compiled at the direction of dendrologist and horticulturist Charles Sprague Sargent. The complete set of sixteen maps, digitized by the David Rumsey Map Collection, represents American forests by genus of tree, density, and position. The USDA estimates that while the total area of forested land in the United States has diminished by 30 percent since the date of European settlement in 1630, “75 percent of net conversion to other uses occurred in the nineteenth century.” Sargent, a Bostonian and officer in the Union Army, was a professor of horticulture and the first director of the Arnold Arboretum at Harvard. Historian Gordon G. David Rumsey Map Collection. Global Forest Change.
Global Forest Watch. Deforestation: Our Disappearing Woodlands. Global Forest Resources.