Economics Evaluation of Ecological Services of Some Aquatic Ecosystems in Badagry Division, Lagos, Nigeria

Abstract

Aquatic ecosystem has vast resources and ecological functions, however the economic worth of its services are often ignored. This study appraised the value of ecological services offered by some aquatic ecosystem (Gbaji, Agboju, Topo and Ajegunle) in Badagry Division, Lagos, Nigeria in relation to the current physical and chemical status of these habitats. Data were collected via random administration of structured questionnaires to 168 households across the stations. Methods employed for collection of information include stated preference, divulged preference and market value approaches. Data collected were tested by one-way Analysis of Variance while differences in mean were separated using Least Significant Difference (p=0.05). Results showed that the highest mean annual income from irrigation for farming (#55,730 ±9,156.6), wage/salary for Boat builder/Net maker (#182, 265.4 ±11,655), water for domestic purpose (#64,256 ±16,426.5), water for washing body or clothes (#54,119.2 ±9,642.4), and industrial/domestic waste (#500,658 ±25,600) were obtained from Ajegunle station. On the other hand, highest mean annual income gotten from ecological services at Gbaji station includes fishing (#351,440 ±15,680), fish for sale (#312, 618 ±26,465.5), Wood and wood product (#59,387±10,792), medicinal plants (#18,116 ±7,680), firewood for sale (#56, 456.9 ±14,316.5), firewood for cooking (#24,145 ±6,425), livestock watering (#235,385 ±35,617) and religion rites (#70,528 ±16,178). Agboju station had highest income in sand for sales (#135,126 ±34,124), transportation (#728,358 ±48,526), sand for construction (#67,426.8 ±5,392.9), and research purpose (#30,200 ±3,390). Topo station had peak (#45, 828.2± 12,654.6) estimated values on fish for household feeding. In comparison of estimated income with hectares of the water bodies, the productivity was in the order of Agboju > Topo > Gbaji> Ajegunle. In conclusion, the water bodies contributed significantly to the household economy of the local people and hence, it is important to protect and improve its management for livelihood enhancement, and secure their long-term ecological functions.