Saheed Adekunle RAJİ, Shakirudeen ODUNUGA, Mayowa FASONA

Spatiotemporal modeling of nutrient retention in a tropical semi-arid basin

The Sokoto-Rima basin defines the natural and socioeconomic lifeblood of northwestern Nigeria. Its agrarian nature is an indication of significant dependence on the supply of ecosystem services from its various rivers, streams, and wetlands. However, nitrogen (N) and phosphorus (P) constitute a great portion of chemical fertilizers used to enhance crop yields and poor management of these portend great threats for water quality. The overarching objective of this study was to examine the extent of spatial variation of nutrient dynamics in the Sokoto-Rima basin between 1992 and 2015 using the nutrient delivery ratio (NDR) model of InVEST (Integrated Valuation of Ecosystem Service and Tradeoffs) software. Land use/landcover, precipitation, digital elevation, and biophysical variables were the principal datasets employed as model input. The result of the study showed that the surficial N load is almost 15-fold of P in the Sokoto-Rima basin. Over the period of study, cultivated areas and rivers were spatially detected as nutrient sources and sinks respectively. The subsurface nutrient load is dominated by P while the amount of N load is insignificant. The trend of nutrient export is linearly defined: with 0.87% and 1.7% increase in N and P export respectively during 1992-2015. N and P exports vary spatially with a north-south increase-decrease index. Critical length and threshold are highly sensitive to changes in the parameterization of the NDR model. Thus, synergistic cultivation practices such as agroforestry should be extended to existing crop cultivation complexes to curtail nutrient enrichment in the Sokoto-Rima basin and ensure environmental sustainability.

Keywords:

Ecosystem services, InVEST, nutrient modeling semi-arid, Sokoto-Rima basin, spatial variation,

PDF

___

[1]. J. W. Redhead, L. May, T. H. Oliver, P. Hamel, R. Sharp, and J. M. Bullock, “National scale evaluation of the InVEST nutrient retention model in the United Kingdom”, Science of the Total Environment, Vol. 610-611, pp. 666–677, 2018.
[2]. S. Salata, G. Garnero, C. A. Barbieri, and C. Giaimo, “The integration of ecosystem services in planning: An evaluation of the nutrient retention model using InVEST software”, Land, Vol 6, No. 48, 2017.
[3]. E. M. Bennett, W. Cramer, A. Begossi, G. Cundill, S. Díaz, B. N. Egoh, I. R. Geijzendorffer, I R., C. B. Crug, S. Lavorel, E. Lazos, L. Lebel, B. Martin-Lopez, P. Meyfroidt, H. A. Mooney, J. L. Nel, U. Pascual, K. Payet, N. P. Harguindeguy, … and G. Woodward, “Linking biodiversity, ecosystem services, and human well-being: three challenges for designing research for sustainability”, Current Opinion in Environmental Sustainability, Vol 14, pp 76 – 85, 2015.
[4]. A. G., Power, “Ecosystem services and agriculture: Tradeoffs and synergies”, Philosophical Transactions of the Royal Society B, Vol 365 No 1554, pp 2959–2971, 2010. https://doi.org/10.1098/rstb.2010.0143.
[5]. Millennium Ecosystem Assessment (MA), Ecosystem and Human Well-Being: Synthesis, Island Press, Washington DC. 2005a.
[6]. Millennium Ecosystem Assessment (MA). Ecosystem and Human Well-Being: Biodiversity Synthesis, Island Press, Washington DC. 2005b.
[7]. P. Hamel, R. Chaplin-Kramer, S. Sim, and C. Mueller, “A new approach to modeling the sediment retention service (InVEST 3.0): Case study of the Cape Fear catchment, North Carolina, USA”, Science of the Total Environment, Vol 524-525, pp 166–177, 2015.
[8]. Y Xue, J. Song, Y. Zhang, F. Kong, M. Wen, and G. Zhang, “Nitrate pollution and preliminary source identification of surface water in a semi-arid river basin, using isotopic and hydrochemical approaches”, Water Vol 8, No 8, pp 328, 2018.
[9]. B. L. Keeler, S. Polasky, K. A. Brauman, K. A. Johnson, J. C. Finlay, A. O. Neill, K. Kovacs, B. Dalzell “Linking water quality and well-being for improved assessment and valuation of ecosystem services” Proceedings of the National Academy of Sciences of the United States of America, Vol 109, No 45, pp 18619–18624, 2012.
[10]. N. Adimalla, S. Venkatayogi, “Geochemical characterization and evaluation of groundwater suitability for domestic and agricultural utility in semi-arid region of Basara, Telangana State, South India”, Applied Water Science, Vol 8, No 44, 2018.
[11]. R. Sharp, H. T. Tallis, T. Ricketts, A. D. Guerry, S. A. Wood, R. Chaplin-Kramer, E. Nelson, D. Ennaanay, … and J. Douglass, “InVEST 3.5.0. User’s Guide. The Natural Capital Project” Stanford University. 2018.
[12]. Z. Meng, Y. Yang, Z. Qin, and L. Huang, “Evaluating temporal and spatial variation in nitrogen sources along the lower reach of Fenhe River (Shanxi Province, China) using stable isotope and hydrochemical tracers”, Water, Vol 10 No 2, pp 231, 2018.
[13]. Z. Tang, W. Xu, G. Zhou, Y. Bai, J. Li, X. Tang, D. Chen, Q. Liu, W. Ma, G. Xiong, H. He, N. He, Y. Guo, Q. Guo, J. Zhu, W. Han, H. Hu, J. Fang, and Z. Xie, “Patterns of plant carbon, nitrogen, and phosphorus concentration in relation to productivity in China’s terrestrial ecosystems”, Proceedings of the National Academy of Sciences of the United States of America, Vol 115, No 16, pp 4033–4038, 2018.
[14]. I. M. Magami and I. Sani, “Spatiotemporal sediment nutrient dynamics of Kware Lake, Nigeria”, Path of Science, Vol. 5. No 4, pp 3001–3006, 2019.
[15]. W. J. Hahm, C. S. Riebe, C. E. Lukens, and S. Araki, “Bedrock composition regulates mountain ecosystems and landscape evolution”, Proceedings of the National Academy of Sciences of the United States of America, Vol 111, No 9, pp 3338–3343, 2014.
[16]. S. E. Hobbie, J. C. Finlay, B. D. Janke, D. A. Nidzgorski, D. B. Millet, and L. A. Baker, “Contrasting nitrogen and phosphorus budgets in urban watersheds and implications for managing urban water pollution”, Proceedings of the National Academy of Sciences of the United States of America, Vol 114, No 16, pp 4177 – 4182, 2016.
[17]. A. Galadima, Z. N. Garba, L. Leke, M. N. Almustapha, I. K. Adam, “Domestic water pollution among local communities in Nigeria ----Causes and consequences”, European Journal of Scientific Research, Vol 52, No 4, pp 592-603, 2011.
[18]. M. I. O. Raji, Y. K. E. Ibrahim, B. A. Tytler, J. O. Ehinmidu, “Physicochemical characteristics of water samples collected from River Sokoto, Northwestern Nigeria” Atmospheric and Climate Sciences, Vol 5, pp 194-199, 2015.
[19]. A. M. Taiwo, O. O. Olujimi, O. Bamgbose and T. A. Arowolo, “Surface Water Quality Monitoring in Nigeria: Situational Analysis and Future Management Strategy”. Water Quality Monitoring and Assessment, [D. Voudouris (ed.)], InTech, 2012.
[20]. S. M. A. Adelana, P. I. Olasehinde and P.Vrbka, “Isotope and geochemical characterization of surface and subsurface waters in the semi-arid Sokoto Basin, Nigeria”, African Journal of Science and Technology, Vol 4 No 2, pp 76–85, 2003.
[21]. M. Abubakar, and J. K. Ipinjolu, “Levels of some anıons ın Sokoto-Rıma Rıver system ın Northwestern Nigeria”, Journal of Research ın Forestry, Wıldlıfe and Envıronmental, Vol 7, No 1, pp 23-39, 2015.
[22]. Tarfa, B. D., Amapu, I. Y., Daudu, C. K., Arunah, U. L., Shero, I. A., Isah, A. S., Yakubu, A. A., Abdu, N., … & Ugbabe, O. O. (2017). Optimizing fertilizer use within the context of integrated soil fertility management in Nigeria. In C. S. Wortmann, & K. Sones (eds.), Fertilizer Use Optimization in Sub-Saharan Africa (pp. 148–163). Nairobi: CAB International.
[23]. X. Liu, H. Sheng, S. Jiang, Z. Yuan, C. Zhang, and J. J. Elser, “Intensification of phosphorus cycling in China since the 1600s”, Proceedings of the National Academy of Sciences of the United States of America, Vol 113, No 10, pp 2609–2614, 2015.
[24]. T. Maavara, C. T. Parsons, C. Ridenour, S. Stojanovic, H. H. Dürr, H. R. Powley, and P. Van Cappellen, “Global phosphorus retention by river damming”, Proceedings of the National Academy of Sciences of the United States of America, Vol 112, No 51, pp 15603–15608, 2015.
[25]. M. P. Perring, L O. Hedin, S. A. Levin, M. McGroddy, and C. de Mazancourt, “Increased plant growth from nitrogen addition should conserve phosphorus in terrestrial ecosystems”, Proceedings of the National Academy of Sciences of the United States of America, Vol 105, No 6, pp 1971–1976, 2008.
[26]. S. A. Raji, M. Fasona, and S. Odunuga, “Simulating future ecosystem services of the Sokoto-Rima basin as influenced by geo-environmental factors”, Turkish Journal of Remote Sensing and GIS, Vol 1, No 2, pp XX-XX, 2020.

Environmental Research and Technology-Cover

Yayın Aralığı: Yılda 4 Sayı
Başlangıç: 2018
Yayıncı: Yıldız Teknik Üniversitesi

Arşiv