生態系と生態学のジャーナル

抽象的な

Perception-based Assessment of Ecosystem Services of Wetlands in Abijata-Shalla National Park in the Central Rift Valley of Ethiopia

Denbel Bedo, Abate Mekuriaw, Amare Bantider

Abijata-Shalla Park has been designated as one of Ethiopia’s national parks to protect wetlands and Ecosystem Services (ESs) within the park’s limits. Some of the ESs that are offered by the wetlands are currently depleting and disappearing rather than being protected. Understanding the drivers behind these changes can help individuals and policymakers design mitigation measures. The objective of this case was to assess ESs and the drivers of change with highlighting on the Abijata wetland. Qualitative and quantitative data were collected using household surveys, focus group discussions and field observations. Using these data, the various ESs were assessed and ranked from 1-10 according to local perception. Analyses of the study revealed that some of the ESs, including fish, papyrus, water reeds, hunting and spiritual services, existed before 1991, but have since disappeared from the site. Twenty ESs are available; 11 services pertain to provisioning, followed by 4 regulating, 3 cultural and 2 supporting services. Wetland for cultivation ranked highest, followed by domestic water supply and pasture. All services, with the exception of arable land and pasture, are on the decline. Water abstraction is the primary driver of ESs change, followed by population growth and deforestation. Water withdrawals from the Ziway-Shalla sub-basin should be restricted. Instead, focus on water conservation strategies to make better use of abstracted water.