Research Article

Ecological Conditions and Ecosystem Services of Artificial Wetlands in Semiarid Ethiopian Highlands

Table 7

The ESs delivered by the artificial wetland ecosystems and their explanations, indicators, and roles.

Categories and ESsExplanation of ESs provided by the wetlandsIndicators for rating the relative importanceRole

Provisioning services
a) Food (vegetables, crops, and fish)Provision of cultivated food: vegetables (carrots, cabbage, garlic), crops (bean, barley, shalom lentils) from irrigated land, and fish from both reservoirsAmount and number of speciesWell-being, socioeconomic
b) Water supply (for irrigating, drinking, and bathing)Provision of fresh water for irrigation, livestock, and domestic uses from both sitesQuality and volume of waterSocioeconomic, well-being
c) Animal fodder and grazingFodder and grazing provision from grasses including Typha sp., by-products of cultivated cropsAmount and number of speciesSocioeconomic
d) Thatching and crafting materialsProvision of thatch grasses for house roofs and Typha sp., Eleusine sp. and Pennisetum sp. for making house utensils, decoration and mattressesAmount and quality of grass typesSocio-economic, well-being
e) Construction materials and firewoodProvision of firewood and house construction materials from Eucalyptus globules, Cupressus lusitanica and Buddleja sp. growing in catchments
Amount and quality of wood and its productsSocioeconomic,
Well-being
f) Medicinal plantsMedicinal plants such as E. globules, Rumex nepalensis, Inula sp., Verbascum sinaiticum, Echinops kebeircho for pharmaceutical and drug productionSpecies types and amount of medicinal partsHealth well-being

Cultural services
a) Recreation and ecotourismWetlands’ green sites, water, towers, and birds used for recreational activities and ecotourism opportunitiesNumber of visitors and visual quality of sitesSocioeconomic
b) Research servicesServing as being study area for graduate students and scholarsResearchable issues (water quality, flora fauna, ecological status)Socioeconomic
c) Educational servicesInformal and formal education/training opportunitiesNumber of students/trainees visitedSocioeconomic

Regulating services
a) Water regulationThe vegetation of wetlands and reservoirs regulate the water flow, runoff, and flooding, thereby recharging ground and surface water, discharging water throughout the year (for drinking and irrigation)Continuous water flow, low runoff/flooding downstream, water quality and quantityEnvironmental conservation, well-being
b) Soil erosion regulationVegetation cover prevents sheet, gully, and wind erosionVegetation coverageEnvironmental management
c) Microclimate regulation and carbon sequestrationVegetation and water surface regulate the microclimate (rainfall and temperature) via evapotranspiration and sequestrate carbon being sunkLess temperature fluctuation and pollutionWell-being
d) Water purification and disease controlWetland vegetation and macro-& microorganisms use to purify waste and polluted water via digesting and absorbing them as food, thereby regulating diseasesClean water discharging from wetlandsWell-being, environmental management
e) Sediment regulationThe vegetation and reservoirs facilitate the deposition of silts in wetlands, thereby preventing sedimentation and flooding of downstreamSilt accumulationEnvironmental management

Supporting services
a) Habitat serviceHabitat for phytoplankton and zooplanktons, wild animals, mainly birds, and vascular plantsNumber and volume of wild fauna and floraBiodiversity conservation
b) Nursery serviceReproduction and growth place for wild animals, including birds, fish, and zooplanktons, and wild floraNumber and cover of young animals, seedlingsRegeneration management