Graphics Library >> Ecosystem

Tag: Ecosystem

Trends in vegetation biomass, Ellsmere Island 1995-2007
Data from many sources and at several scales suggest that recent climate change is already affecting terrestrial Arctic ecosystems. Comparisons of historical and contemporary aerial photographs provide evidence that Arct...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Arctic sea ice food web - schematic illustration
Sea ice represents a unique ecosystem in the Arctic, providing habitat to specialized iceassociated species that include microorganisms, fish, birds, and marine mammals. Individual species use sea ice in different ways d...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
How the comb-jelly (Mnemiopsis leidyi) is spreading through European seas (invasive species)
The most threatening event for the Caspian ecosystem was the arrival of the North American comb jelly (Mnemiopsis leidyi). It was brought accidentally to the Caspian in the ballast water of oil tankers. Invasive and alie...
21 May 2010 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Red king crab native and invasive distribution
The red king crab is native to the Okhotsk and Japan Seas, the Bering Sea, and the northern Pacific Ocean, where it is an important economic resource. In Alaskan waters, red king crabs have historically been the second m...
13 Oct 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Marine mammals in the Arctic
Seven species of marine mammals live in the Arctic year-round – the bowhead whale, beluga whale, narwhal, ringed seal, beaded seal, walrus, and polar bear - and many more migrate to the Arctic seasonally. Many marine mam...
13 Oct 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Index of biodiversity potential in Central America
Biodiversity is vitally important to human well-being as it provides ecosystem services on which humans depend. For many species that are sensitive to even small variations in climate, their primary threat is climate cha...
22 Nov 2010 - by Nieves López Izquierdo, Associate Consultant UNEP/GRID-Arendal
Expected impacts of climate change in 2050
It is expected that by 2050 there will be threats to ecosystem services in the Andes and Mexico, in the Central American and Caribbean sub-regions, and in southeastern Brazil, while there will be negative effects on fish...
22 Nov 2010 - by Nieves López Izquierdo, Associate Consultant UNEP/GRID-Arendal
Ecosystems in Northwest Russia
The map shows the range of fourteen different ecosystem types across Russia. The Barents region is in the Arctic and covers the area of Western Russia and the northern areas of Finland, Sweden and Norway. (Please note th...
04 Oct 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Harmful effects of ecosystem changes on human health
No data
28 Mar 2006 - by Bounford.com and UNEP/GRID-Arendal
Sea level rise and assessment of the state of the marine environment
A significant sea level rise is one of the major anticipated consequences of climate change. This will cause some low-lying coastal areas to become completely submerged, while others will increasingly face short-lived hi...
01 Oct 2009 - by Philippe Rekacewicz
Freshwater use by sector at the beginning of the 2000s
The agricultural sector is by far the biggest user of freshwater. Analysis indicates that: - In the United States, agriculture accounts for some 49% of total freshwater use, with 80% of this volume being used for irriga...
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique)
Tigris and Euphrates rivers fragmentation
It has been predicted that access to water will create conflict between countries. In Africa, central Asia, west Asia and the Americas, some countries are already arguing fiercely over access to rivers and inland seas, a...
26 Jan 2009 - by Philippe Rekacewicz
Cereal productivity in sub-Saharan Africa under a projected Intergovernamental Panel on Climate Change (IPCC) scenario
A majority of the population in sub-Saharan African lives in rural areas, where income and employment depend almost entirely on rain-fed agriculture. This population is today at high risk. Sub-Saharan Africa already has ...
26 Jan 2009 - by Philippe Rekacewicz
Human actions leading to coastal degradation
Physical alteration and the destruction of habitats are now considered one of the most significant threats to coastal areas. Half of the world’s wetlands, and even more of its mangrove forests, have been lost over the pa...
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique), February 2006
Coastal populations and shoreline degradation
Unsurprisingly, the coastal areas with the greatest population densities are also those with the most shoreline degradation. The areas surrounding the Black Sea, the Mediterranean and southern Asia have the highest prop...
01 Oct 2009 - by Phillippe Rekacewicz, February 2006
Lake Chad: almost gone
Straddling the borders of Chad, Niger and Cameroon in West Africa, Lake Chad has been a source of freshwater for irrigation projects in each of these countries. Maps drawn from a series of satellite images show a dramati...
06 Nov 2009 - by Philippe Rekacewicz (Le Monde diplomatique), February 2006
Global waterstress and scarcity
Water scarcity occurs when the amount of water withdrawn from lakes, rivers or groundwater is so great that water supplies are no longer adequate to satisfy all human or ecosystem requirements, resulting in increased com...
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique), February 2006
Species Turnover
Change in the initial species richness in 2005 relative to 2001-2005 average (high-range climate change scenario). Studies predict species invasion will be profound in the Arctic and Southern Oceans. Among others these c...
06 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
South Africa biomes
South Africa is blessed with a rich abundance of biodiversity and a wide range of ecosystems and biomes. Among them are the wetland ecosystems, which occupy approximately seven per cent of South Africa’s total land area....
21 Jun 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Pressures on the South African coast
Population growth puts pressure on coastal ecosystems. Increased population means growing demand for land for housing and infrastructure, increased use of living resources for food, and more use of available freshwater r...
21 Jun 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Previous | 1 2 3 4 5 | Next