One third of the world’s population lives in coastal areas and rapid development of these areas has meant increased construction of coastal infrastruc- ture (e.g. ports, navigation channels, coastal de- fence) and related activities (e.g. land reclamation, beach nourishment), which has inevitably led to conflicting priorities between coral reef conservation and economic growth. The key impacts of these ac- tivities, if not managed, include:
• Direct loss of coral reef caused by the removal or burial of reefs
• Lethal or sub-lethal stress to corals caused by elevated turbidity and sedimentation rates
Dredging and port construction activities potentially affect not only the site itself, but also surrounding ar- eas, through a large number of impact vectors (e.g. turbid plumes, sedimentation, release of contami- nants, bathymetric changes). Effects may be imme- diate or develop over a longer timeframe and may be temporary or permanent in nature, depending on a large number of factors.
Co‐benefits, often called multiple benefits, are the positive impacts of Reducing Emissions from Deforestation and Forest Degradation (REDD) that are additional to emissions reductions. These include ecosystem and social benefits such as biodiversity and non‐timber forest products. Potential co‐benefits from REDD are widely relevant in Tanzania, where forests and woodlands support the livelihoods of 87% of the rural poor (Milledge et al. 2007). Conserving biodiversity also promotes the continued provision of these benefits under environmental change (Campbell et al. 2009), thus increasing resilience to climate change. Depending on where REDD action is taken, the co‐benefits delivered will vary. Simple mapping tools can help identify how carbon, other services and pressures such as fire are distributed and relate to each other.
Here, we map the distribution of carbon stocks in relation to the possible co‐benefits of REDD, alongside other relevant factors. A new map of carbon in Tanzania’s ecosystems has been produced for this analysis.Resource Type: Reports
UNEP-WCMC, with support from the German Federal Agency for Nature Conservation (BfN), has launched a new website highlighting the potential for actions on reducing emissions from land use change to secure additional important benefits for biodiversity and ecosystem services (co-benefits). The website demonstrates the utility of spatial analyses to assist decision makers in identifying areas where high carbon, high biodiversity priority, and ecosystem service values overlap, which represent opportunities for securing co-benefits. It showcases UNEP-WCMC’s recent work with in-country partners on developing such analyses and includes an interactive mapping tool that allows users to explore the spatial relationships between carbon and co-benefits.Resource Type: Tools / Applications
Emissions from land use change mainly forest loss contribute 17 4% of total change, loss, 17.4% anthropogenic greenhouse gas emissions (IPCC 2007). The UN Framework Convention on Climate Change is currently discussing incentives for Reducing Emissions from Deforestation and forest Degradation in developing countries (REDD). In addition to securing carbon, REDD can deliver co‐benefits, including conservation of forest biodiversity and maintenance of ecosystem services. To help secure co‐benefits, it is useful to find out where high carbon, high biodiversity priority and ecosystem service values overlap.Resource Type: Posters
This tool provides interactive maps that allow users to explore the distribution of carbon density relative to areas high in biodiversity and areas which are nationally protected for different countries around the world. Users can view layers, show or hide layer content, as well as see how the distribution of carbon and biodiversity relates to other geographical features such as rivers, coastlines, and international boundaries.Resource Type: Spatial Data / Maps
This innovative tool provides users with initial estimates of embedded carbon within an identified spatial area such as a protected area or any user-defined polygon drawn on a global map.Resource Type: Tools / Applications
This poster series was created in 2004 to highlight the work of the UNEP Coral Reef Unit.Resource Type: Posters
International Coral Reef Action Unit postersResource Type: Posters
International Coral Reef Initiative postersResource Type: Posters
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