AMUSA Tajudeen Okekunle

@unilorin.edu.ng

Reader/Forest Resources Management/Agriculture/University of Ilorin

AMUSA Tajudeen Okekunle


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https://researchid.co/amusatajudeen

EDUCATION

BSc., MSc., PhD (Forest Resources Management)

RESEARCH, TEACHING, or OTHER INTERESTS

Forestry, Forestry, Forestry, Forestry
18

Scopus Publications

1056

Scholar Citations

17

Scholar h-index

24

Scholar i10-index

Scopus Publications

  • Management of Diabetes Mellitus and Hypertension by the Yorubas in Southwest Nigeria: An Inventory of Useful Ethnobotanicals
    Tajudeen O. Amusa, Sherif B. Adeyemi, Medinat O. Aiyelero, Olubunmi Atolani, Ngaitad S. Njinga, Bilqis A. Lawal, Moji T. Bakare-Odunola, Farhan J. Moshood, Kaothar K. Azeez
    Tropical Journal of Natural Product Research, 2026
    The prevalence and consequential mortality rate of diabetes mellitus and hypertension are concerning; thus, this study explored the traditional knowledge of medicinal plants used in their management by the Yoruba people of Southwest Nigeria. A descriptive cross-sectional survey was conducted across the six states of the region, involving 180 respondents, comprising herb sellers and traditional medicine practitioners. Using structured questionnaires and key informant interviews, data were documented and analysed with the aid of descriptive statistics, inferential statistics and ethnobotanical indices, viz, Use Value (UV), Relative Frequency of Citation (RFC), and Cultural Importance Index (CII). Fifty-five (55) plant species belonging to 36 families were identified, with Fabaceae and Apocynaceae being predominant. Leaves were the most commonly utilised plant part (43–54%). Frequently cited and culturally significant species included Picralima nitida, Aristolochia ringens, Gymnanthemum amygdalinum, Rauwolfia vomitoria, Pyrus communis, and Garcinia kola. While the Use Value (UV) differed among states (p ­≤ 0.05), RFC and CII values were consistent, indicating shared ethnomedicinal traditions. Herbal Knowledge was primarily passed down within families, with women serving as the principal custodians. The majority of respondents advocated for collaboration between traditional and modern healthcare systems and emphasized conservation through cultivation and government protection. The study underscores the ethnobotanical richness of the region and its potential contribution to healthcare and biodiversity management. It provides a baseline for phytochemical and pharmacological validation of priority species and advocates for integration of validated herbal remedies into complementary healthcare systems and conservation frameworks.
  • Retraction notice to "Isolation, characterization and anti-inflammatory activity of compounds from the Vernonia amygdalina"(Heliyon, (2024), 10, 8, (e29518), (S240584402405549X), 10.1016/j.heliyon.2024.e29518)
    Olubunmi Atolani, Mohammed Abubakar Usman, Jamiu Opeyemi Adejumo, Adedamola Elizabeth Ayeni, Olamilekan Joseph Ibukun, Adeola T. Kola-Mustapha, Ngaitad S. Njinga, Luqman A. Quadri, Emmanuel O. Ajani, Tajudeen O. Amusa, Moji T. Bakare-Odunola, Adenike T. Oladiji, Athba Alqahtani, Mohamed Abbas, Learnmore Kambizi
    Heliyon, 2025
    [This retracts the article DOI: 10.1016/j.heliyon.2024.e29518.].
  • Isolation, characterization and anti-inflammatory activity of compounds from the Vernonia amygdalina
    Olubunmi Atolani, Mohammed Abubakar Usman, Jamiu Opeyemi Adejumo, Adedamola Elizabeth Ayeni, Olamilekan Joseph Ibukun, Adeola T. Kola-Mustapha, Ngaitad S. Njinga, Luqman A. Quadri, Emmanuel O. Ajani, Tajudeen O. Amusa, Moji T. Bakare-Odunola, Adenike T. Oladiji, Athba Alqahtani, Mohamed Abbas, Learnmore Kambizi
    Heliyon, 2024
    The need to explore the abundance of natural products cannot be overemphasized particularly in the management of various disease conditions. In traditional medical practice, Vernonia amygdalina has been widely adopted in the management of various inflammatory disorders. The objective of this investigation was to isolate the bioactive principles from the stem-bark and root of V. amygdalina and assess the anti-inflammatory ( in vitro ) activity of both the crude extracts and the isolated compounds. Following extraction with the methanol, the extract was subjected to gravity column chromatography and the resultant fractions was further purified to obtained pure compounds. The structural elucidation of the compounds were based on data obtained from 1H and 13C nuclear magnetic resonance (NMR) spectroscopies as well as fourier transform infrared (FT-IR). Using diclofenac as a control drug, , the albumin denaturation assay was used to determine the in vitro anti-inflammatory activity of the extracts and isolates. Three distinct compounds characterized are vernoamyoside D, luteolin-7-α-o-glucuronide, and vernotolaside, a new glycoside. When compared to diclofenac, which has an IC 50 of 167.8 μg/mL, luteolin-7-α-o-glucuronide, vernoamyoside D, and vernotolaside all showed significant inhibitions with respective IC 50 values 549.8, 379.5, and 201.7 μg/mL. Vernotolaside is reported for the first time from the root. The assertion that the plant is used in traditional medicine for the management of inflammatory disorder is somewhat validated by the confirmation of the existence of the compounds with the biochemical actions. Further validation of the isolated compounds would be required in animal studies.
  • The Role of Non-Timber Forest Products for Sustainable Livelihoods in African Multifunctional Landscapes
    Tajudeen O. Amusa, Marie L. Avana-Tientcheu, Nyong Princely Awazi, Paxie W. Chirwa
    Trees in A Sub Saharan Multi Functional Landscape Research Management and Policy, 2024
  • Commercialization Potential of Africa’s Indigenous Fruit Trees (IFTs) and Their Products for Enhancing Nutrition and Rural Livelihoods
    Gillian Kabwe, Achille E. Assogbadjo, Festus K. Akinnifesi, Fifanou G. Vodouhe, Paxie W. Chirwa, Tajudeen O. Amusa
    Trees in A Sub Saharan Multi Functional Landscape Research Management and Policy, 2024
  • Socio-economic Factors, Policy and Governance Systems Influencing Multifunctional Landscapes
    Paxie W. Chirwa, Witness Kozanayi, Amani J. Uisso, Ratsodo P. Tshidzumba, Folaranmi D. Babalola, Tajudeen O. Amusa
    Trees in A Sub Saharan Multi Functional Landscape Research Management and Policy, 2024
  • Securing Multifunctional Landscapes in Africa: What Is the Future Policy, Research and Development Direction?
    Paxie W. Chirwa, Stephen Syampungani, Theodore M. Mwamba, Kokou Kouami, Tajudeen O. Amusa, Jonathan M. Kamwi, Folaranmi D. Babalola, Simon A. Mng’omba, Abdullahi A. Yusuf, Gillian Kabwe, Eméline S. P. Assèdé, Gudeta W. Sileshi, Paul Thangata, Lackson Chama
    Trees in A Sub Saharan Multi Functional Landscape Research Management and Policy, 2024
  • Isolation, Characterization and in vitro Alpha-amylase Inhibition Potential of Novel Bioactives from Vernonia amygdalina
    Chemist, 2023
  • Bioactivity of leaf and bark extractives of Prosopis africana (Guill., Perrott. and Rich.) Taub. against some multidrug-resistant microbes
    Nusrah Sadiku, Ibikunle Anibijuwon, Tajudeen O. Amusa, E. T. Awolola
    Indian Journal of Natural Products and Resources, 2023
    The aqueous, methanolic, ethanolic and n-Hexane leaf and bark of P. africana extracts were tested for antimicrobial activity against five clinical pathogens: Acinetobacter baumanii, Escherichia coli 25922, Escherichia coli ESBL, Methicillin-Resistant Staphylococcus aureus, and Candida albicans ELI. Antimicrobial sensitivity test was carried out using the agar well diffusion method at a stock and varying concentrations of 500, 1000 and 1500 mg/mL. Results indicated that n-hexane leaf and bark extracts could not inhibit the organisms. Aqueous leaf extracts inhibited A. baumanii, MRSA, E. coli ESBL and E. coli 25922, while aqueous bark extract inhibited A. baumanii, MRSA, E. coli 25922, C. albicans ELI. Methanolic leaf extracts inhibited A. baumanii, MRSA, E. coli ESBL, while Methanolic bark extracts inhibited A. baumanii, MRSA, E. coli ESBL, E. coli 25922, C. albicans ELI. Ethanolic bark extracts inhibited A. baumanii, MRSA, E. coli ESBL, E. coli 25922, C. albicans ELI. The Minimum Inhibitory Concentration of the extracts for leaf and bark ranged from 1500 mg/mL – 23.43 mg/mL. Minimum Bactericidal Concentration was observed in aqueous leaf extracts against E. coli 25922 at 1500 concentration. Antibiotics susceptibility test indicated multidrug resistance by the test organisms with only Ofloxacin, Gentamycin, Ceftazidime and Nitrofurantoin eliciting inhibitory activity against A. baumanii, E. coli ESBL and E. coli 25922, respectively. Preliminary phytochemical screening revealed that P. africana leaf and bark extractives contained beneficial phytochemicals responsible for their high bioactivity against the selected clinical isolates.
  • USE OF GEOTRACKER AND KOBOCOLLECT IN MONITORING PATROL EFFORT AND ILLEGAL ACTIVITIES IN OMO FOREST RESERVE, NIGERIA
    Tajudeen Okekunle Amusa, Kayode Kaothar Azeez, Emmanuel Abiodun Olabode
    Parks, 2021
    The study reports the use of GeoTracker and KoBoCollect as law enforcement monitoring tools in the elephant sanctuary of Omo Forest Reserve, southwest Nigeria. Illegal activities in and around the sanctuary were monitored from November 2019 to January 2021 through data collection by rangers while on patrol using the GeoTracker and KoBoCollect system. A total of 267 days of patrol were undertaken during the period. The patrol effort covered 1,081 km (Average = 83 km/month). The mean patrol effort of the rangers was 0.3. About 338 illegal activities that included hunting/gunshots/detection of spent cartridges, setting of wire snare/iron trap, encroachment, logging and farming were recorded. There was a significant difference in the frequencies of encounters of illegal activities across the months. There was also a weak but positive correlation between patrol effort and encounter rate of illegal activities. Spatial distribution of ranger patrols shows that patrols were largely concentrated in the south/mideastern part of the sanctuary. The area covered by patrols was relatively small compared to the total area of the sanctuary. The monitoring system provided useful feedback that can help improve the management of the elephant sanctuary.
  • Assessing awareness on biodiversity conservation among Nigerians: the Aichi Biodiversity Target 1
    Emmanuel O. Akindele, Michael C. Ekwemuka, Paul Apeverga, Tajudeen O. Amusa, Samuel Olajuyigbe, Oluwakayode M. Coker, Fatsuma Olaleru, Michelle Fasona, Elizabeth N. Usen, Abubakar S. Ringim, Opeyemi A. Adedoja, Chinedu C. Nsude, Ama C. Ota, Freeman E. Oluowo, Alex B. Onatunji, Abiodun M. Adedapo, Aghogho Kolawole-Daniels
    Biodiversity and Conservation, 2021
  • Toxicity assessment of sub-acute and sub-chronic oral administration and diuretic potential of aqueous extract of Hibiscus sabdariffa calyces
    N.S. Njinga, A.T. Kola-Mustapha, A.L. Quadri, O. Atolani, R.O. Ayanniyi, M.O. Buhari, T.O. Amusa, E.O. Ajani, O.O. Folaranmi, M.T. Bakare-Odunola, L. Kambizi, A.T. Oladiji, P. Ebong
    Heliyon, 2020
  • Socio-economic factors influencing marketing of non-timber forest products in tropical lowland rainforests of south-western Nigeria§
    Tajudeen O Amusa, S Oladunni Jimoh, Ismail O Azeez
    Southern Forests, 2017
  • Movement patterns and resource needs of Kamuku elephants along migration routes in Nigeria
    Pachyderm, 2015
  • Population distribution and threats to sustainable management of selected non-timber forest products in tropical lowland rainforests of south western Nigeria
    S. O. Jimoh, T. O. Amusa, I. O. Azeez
    Journal of Forestry Research, 2013
  • Participatory survey of elephants (Loxodonta africana) in Kamuku National Park and its environs, northwestern Nigeria
    Pachyderm, 2013
  • Spatial distribution of turaco-preferred food plants in Ngel Nyaki Forest Reserve, Mambilla Plateau, Taraba State, Nigeria
    F.D. Babalola, T.O. Amusa, Z.J. Wala, S.T. Ivande, J.O. Ihuma, T.I. Borokini, O.O. Jegede, D. Tanko
    Biodiversity, 2012
  • Ethnobotany and conservation of plant resources of Kainji Lake National Park, Nigeria
    Tajudeen Okekunle Amusa, Saka Oladunni Jimoh
    Ethnobotany Research and Applications, 2010

RECENT SCHOLAR PUBLICATIONS

  • Assessment of Stakeholders’ Willingness to Participate in Private Forest Plantation Establishment in Ilorin, Kwara State, Northcentral Nigeria
    TO Amusa, HO Raji, KK Azeez
    Journal of Forest and Environmental Science 42 (1), 27-44 , 2026
    2026
  • Retraction notice to" Isolation, characterization and anti-inflammatory activity of compounds from the Vernonia amygdalina"[Heliyon 10 (2024) e29518]
    O Atolani, MA Usman, JO Adejumo, AE Ayeni, OJ Ibukun, ...
    Heliyon 11 (15) , 2025
    2025
  • Co–creation Approaches to Improve Conservation Efforts of African Elephant Populations in Nigeria
    SJ Fada, TC Omotoriogun, TO Amusa, BA Danmallam, PS Kumdet, ...
    European Journal of Sustainable Development 13 (4), 1-1 , 2024
    2024
  • Multifunctional Landscapes
    PW Chirwa, W Kozanayi, AJ Uisso, RP Tshidzumba, FD Babalola, ...
    Trees in a Sub-Saharan Multi-functional Landscape: Research, Management, and … , 2024
    2024
  • Research and Development Direction?
    K Kouami, TO Amusa, JM Kamwi
    Trees in a Sub-Saharan Multi-functional Landscape: Research, Management, and … , 2024
    2024
  • Securing Multifunctional Landscapes in Africa: What Is the Future Policy, Research and Development Direction?
    PW Chirwa, S Syampungani, TM Mwamba, K Kouami, TO Amusa, ...
    Trees in a Sub-Saharan Multi-functional Landscape: Research, Management, and … , 2024
    2024
    Citations: 4
  • Socio-economic factors, policy and governance systems influencing multifunctional landscapes
    PW Chirwa, W Kozanayi, AJ Uisso, RP Tshidzumba, FD Babalola, ...
    Trees in a Sub-Saharan Multi-functional Landscape: Research, Management, and … , 2024
    2024
    Citations: 9
  • Multifunctional Landscapes
    TO Amusa, ML Avana-Tientcheu, NP Awazi
    Trees in a Sub-Saharan Multi-functional Landscape: Research, Management, and … , 2024
    2024
  • Commercialization Potential of Africa’s Indigenous Fruit Trees (IFTs) and Their Products for Enhancing Nutrition and Rural Livelihoods
    G Kabwe, AE Assogbadjo, FK Akinnifesi, FG Vodouhe, PW Chirwa, ...
    Trees in a Sub-Saharan Multi-functional Landscape: Research, Management, and … , 2024
    2024
  • The role of non-timber forest products for sustainable livelihoods in African multifunctional landscapes
    TO Amusa, ML Avana-Tientcheu, NP Awazi, PW Chirwa
    Trees in a Sub-Saharan multi-functional landscape: Research, management, and … , 2024
    2024
    Citations: 35
  • Isolation, characterization and anti-inflammatory activity of compounds from the Vernonia amygdalina
    O Atolani, MA Usman, JO Adejumo, AE Ayeni, OJ Ibukun, ...
    Heliyon 10 (8) , 2024
    2024
    Citations: 4
  • Assessment of carbon sequestration of Teak (Tectona grandis Linn. F.) plantation on the campus of University of Ilorin, Nigeria
    TO Amusa, M AMINU, F Moshood
    Reforesta, 27-42 , 2023
    2023
    Citations: 5
  • Isolation, Characterization and in vitro Alpha-amylase Inhibition Potential of Novel Bioactives from Vernonia amygdalina
    O Atolani, AE Ayeni, M Abubakar, JOA Usman, OJ Ibukun, T Adeola
    The Chemist, 38 , 2023
    2023
  • Bioactivity of leaf and bark extractives of Prosopis africana (Guill., Perrott. and Rich.) Taub. against some multidrug-resistant microbes
    NA Sadiku, II Anibijuwon, TO Amusa, ET Awolola
    Indian Journal of Natural Products and Resources (IJNPR)[Formerly Natural … , 2023
    2023
  • Effect of tree canopy cover on urban heat island in Ilorin metropolis, Kwara State, north-central, Nigeria.
    TO Amusa, RA Adebayo, F Moshood, TM Ibrahim
    2022
    Citations: 6
  • Willingness to Pay for Ecosystem Services in Protected Areas: Case Study of Old Oyo National Park, Nigeria
    TO Amusa, B Ashimolowo, MKA Wahab
    Journal of Sustainable Environmental Management. Vol 14, 11-25 , 2022
    2022
  • Assessment of public perception of socioeconomic impacts of forest plantation at University of Ilorin, north-central Nigeria.
    TO Amusa, RO Oladaride, MKA Wahab
    Journal of Forest Science and Environment. Published by the Department of … , 2022
    2022
    Citations: 1
  • Culture and the illegal trade in vultures in southwestern Nigeria: conundrums and recommendations.
    SM Awoyemi, L Thomas-Walters, BP Anthony, D Vyas, R Buij, TO Amusa
    Vulture News 83, 18-31 , 2022
    2022
    Citations: 9
  • Shea butter production and marketing efficiency in Kwara State, Nigeria
    TO Amusa, A TO
    FAO; , 2022
    2022
    Citations: 2
  • Assessing awareness on biodiversity conservation among Nigerians: the Aichi Biodiversity Target 1
    EO Akindele, MC Ekwemuka, P Apeverga, TO Amusa, S Olajuyigbe, ...
    Biodiversity and Conservation 30 (7), 1947-1970 , 2021
    2021
    Citations: 52

MOST CITED SCHOLAR PUBLICATIONS

  • The role of traditional laws and taboos in wildlife conservation in the Oban Hill Sector of Cross River National Park (CRNP), Nigeria
    SO Jimoh, ET Ikyaagba, AA Alarape, EE Obioha, AA Adeyemi
    Journal of human ecology 39 (3), 209-219 , 2012
    2012
    Citations: 117
  • Effects of three pre-treatment techniques on dormancy and germination of seeds of Afzelia africana (Sm. Ex pers)
    TO Amusa
    Journal of Horticulture and forestry 3 (4), 96-103 , 2011
    2011
    Citations: 100
  • Ethnobotany and conservation of plant resources of Kainji Lake National Park, Nigeria
    TO Amusa, SO Jimoh
    Ethnobotany Research and Applications 8, 181-194 , 2010
    2010
    Citations: 81
  • Contributions of non-timber forest products to household food security and income around Onigambari forest reserve, Oyo State, Nigeria
    SO Jimoh, EA Haruna
    Journal of Environmental Extension 6, 28-33 , 2007
    2007
    Citations: 54
  • Assessing awareness on biodiversity conservation among Nigerians: the Aichi Biodiversity Target 1
    EO Akindele, MC Ekwemuka, P Apeverga, TO Amusa, S Olajuyigbe, ...
    Biodiversity and Conservation 30 (7), 1947-1970 , 2021
    2021
    Citations: 52
  • Population distribution and threats to sustainable management of selected non-timber forest products in tropical lowland rainforests of south western Nigeria
    SO Jimoh, TO Amusa, IO Azeez
    Journal of Forestry Research 24 (1), 75-82 , 2013
    2013
    Citations: 50
  • Toxicity assessment of sub-acute and sub-chronic oral administration and diuretic potential of aqueous extract of Hibiscus sabdariffa calyces
    NS Njinga, AT Kola-Mustapha, AL Quadri, O Atolani, RO Ayanniyi, ...
    Heliyon 6 (9) , 2020
    2020
    Citations: 45
  • Forest Structure Analysis in the oban division of Cross River national park, Nigeria
    SO Jimoh, PO Adesoye, AA Adeyemi, ET Ikyaagba
    Journal of Agricultural Science and Technology. B 2 (5B), 510 , 2012
    2012
    Citations: 39
  • Community-based forest resources management in Nigeria: case study of ngel nyaki forest reserve, mambilla plateau, Taraba State, Nigeria
    TI Borokini, FD Babalola, TO Amusa
    Department of Forestry and Environmental Science University of Sri … , 2012
    2012
    Citations: 37
  • The role of non-timber forest products for sustainable livelihoods in African multifunctional landscapes
    TO Amusa, ML Avana-Tientcheu, NP Awazi, PW Chirwa
    Trees in a Sub-Saharan multi-functional landscape: Research, management, and … , 2024
    2024
    Citations: 35
  • Land use activities among forest environments’ dwellers in Edo State, Nigeria: implications for livelihood and sustainable forest management
    IO Azeez, OS Ikponmwonba, L Popoola, TO Amusa
    2010
    Citations: 35
  • Determining the local importance of non-timber forest products using two different prioritization techniques
    TO Amusa, SO Jimoh
    Scientific & Academic Publishing , 2012
    2012
    Citations: 33
  • Socio-economic factors influencing marketing of non-timber forest products in tropical lowland rainforests of south-western Nigeria
    TO Amusa, SO Jimoh, IO Azeez
    Southern Forests: a Journal of Forest Science 79 (2), 161-168 , 2017
    2017
    Citations: 31
  • Prevalence, utilization and conservation strategies for non-timber forest products in South Western zone of Nigeria
    SO Jimoh, TO Amusa, IO Azeez
    2012
    Citations: 30
  • Bush meat harvesting and human subsistence nexus in the Oban hill Communities of Nigeria
    EE Obioha, PN Isiugo, SO Jimoh, E Ikyaagba, R Ngoufo, BK Serge, ...
    Journal of Human Ecology 38 (1), 49-64 , 2012
    2012
    Citations: 25
  • Proteinease inhibition, membrane stabilization, antioxidant and phytochemical evaluations of leaves, seeds and calyces of four selected edible medicinal plants
    L Kambizi, MT Bakare-Odunola, AT Oladiji, AT Kola-Mustapha, TO Amusa, ...
    Cogent Chemistry 3 (1), 1314064 , 2017
    2017
    Citations: 20
  • Non-timber forest products and sustainable forest management in Nigeria
    SO Jimoh, LA Adebisi
    Forestry Association of Nigeria , 2005
    2005
    Citations: 20
  • Elemental composition and proximate analysis of five commonly used African medicinal plants
    AL Quadri, NS Njinga, AT Kola-Mustapha, TO Amusa, O Atolani, ...
    Plant Archives , 2021
    2021
    Citations: 16
  • Population status and distribution of forest elephants (Loxodonta cyclotis Matschie, 1900) in Okomu National Park and Omo forest reserve, South-western Nigeria
    TO Amusa, C Omonu, E Olabode, NJ Newton
    Journal of Research in Forestry, Wildlife and Environment 9 (2), 44-56 , 2017
    2017
    Citations: 13
  • Uses and prevalence of African baobab (Adansonia digitata L 1759) in Okoo community, Kwara State, North-Central Nigeria
    TO Amusa, SA Aderinoye-Abdulwahab, SO Akanbi, OP Idowu
    J. Agric. Food Environ 13 (1), 43-49 , 2017
    2017
    Citations: 12