Jonathan C. Onyekwelu

ORCID: 0000-0003-1473-178X
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About
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Research Areas
  • African Botany and Ecology Studies
  • Forest ecology and management
  • Agroforestry and silvopastoral systems
  • Conservation, Biodiversity, and Resource Management
  • Forest Management and Policy
  • Urban Green Space and Health
  • Agriculture and Rural Development Research
  • Forest Biomass Utilization and Management
  • Ethnobotanical and Medicinal Plants Studies
  • Rangeland Management and Livestock Ecology
  • Land Use and Ecosystem Services
  • Leaf Properties and Growth Measurement
  • Seed and Plant Biochemistry
  • Ecology and Vegetation Dynamics Studies
  • Urban Agriculture and Sustainability
  • Botany and Plant Ecology Studies
  • Tree Root and Stability Studies
  • Natural Compound Pharmacology Studies
  • African history and culture studies
  • Botanical Research and Applications
  • Cocoa and Sweet Potato Agronomy
  • Plant Diversity and Evolution
  • Bioenergy crop production and management
  • Forest Ecology and Biodiversity Studies
  • Public-Private Partnership Projects

Federal University of Technology
2015-2024

Abubakar Tafawa Balewa University
2016

Technical University of Munich
2006

Societal Impact Statement Globally, cities are planning for resilience through urban greening initiatives as governments understand the importance of forests in improving quality life and mitigating climate change. However, persistence ecosystem benefits they provide threatened by change, systematic assessments causes tree dieback mortality environments rare. Long‐term monitoring studies adaptive management needed to identify prevent change‐driven failures mortality. Research when coupled...

10.1002/ppp3.10240 article EN cc-by-nc-nd Plants People Planet 2022-01-18

This study was conducted to investigate the tree species richness and diversity of urban periurban areas Federal Capital Territory (FCT), Abuja, Nigeria, produce Normalized Difference Vegetation Index (NDVI) for territory. Data were collected from (Abuja city) (Lugbe) FCT using both semistructured questionnaire inventory within green areas. In location, all trees with diameter at breast height (dbh) ≥ 10 cm identified; their dbh measured frequency taken. The NDVI calculated in ArcGIS 10.3...

10.1155/2017/4549756 article EN cc-by International Journal of Forestry Research 2017-01-01

This research focuses on the urban tree species population and diversity within Ibadan metropolis as a means of creating biodiversity database for centre in South west, Nigeria.This was determined by assessing forest abundance, growth yield.All trees with diameter at breast height (dbh) ≥ 10 cm were identified, dbh measured their frequencies taken all area enumerated Ibadan.There are 155 stems belonging to 26 families 54 built-up areas 101 16 19 peri-urban Ibadan.The two most abundant...

10.13189/eer.2016.040401 article EN cc-by Environment and Ecology Research 2016-07-01

Globally, sacred groves represent a traditional form of community-based conservation, recognized as areas cultural and religious importance to local people. In some cases, the entire community guards against desecration of, or unauthorized access to, such sites, either by its members outsiders; in others, non-recognition customary rights is linked degradation. This paper uses case study three southwest Nigeria examine extent which perceived socio-economic religio-cultural benefits contribute...

10.5334/ijc.1143 article EN cc-by International Journal of the Commons 2022-06-16

This study assessed and compared tree species diversity in a 26-year-old Gmelina arborea plantation with diversities primary degraded natural forests southwestern Nigeria. In each forest type, one-hectare block was divided into 400 m2 sample plots from which 4 were randomly selected, repeated on another block, yielding eight per type. A 25 quadrat laid at the centre of plot while sub-quadrat quadrat. Overstory, sapling seedling inventoried all plots, quadrats, sub-quadrats, respectively....

10.1080/21513732.2016.1162199 article EN International Journal of Biodiversity Science Ecosystems Services & Management 2016-01-02

Tropical forests contain many nutritionally and socio-economically important fruit tree species. Farm-level growth characteristics, phenotype market potentials of Chrysophyllum albidum, Irvingia gabonensis Garcinia kola in rainforest derived savanna ecosystems Nigeria were assessed. Growth measurements made on 100 trees each species from 10 villages. Questionnaires used to obtain information farmers marketers the at farm-gate, urban rural markets. Mean age varied 19.5 43.5 years, with being...

10.1080/14728028.2014.942386 article EN Forests Trees and Livelihoods 2014-08-05

The paper examines poverty alleviation through optimizing the marketing of Garcinia kola and Irvingia gabonensis in Ondo State, Nigeria. Data for this study were collected using structured questionnaire. Two categories pretested questionnaires used to obtain information from respondents (farmers marketers species). analysis was done descriptive analysis, Student t -test compare income generated by producers fruits tree species. In addition, variance (ANOVA), arranged randomized complete...

10.1155/2013/376247 article EN ISRN Forestry 2013-07-14

10.1016/j.conbuildmat.2021.123123 article EN Construction and Building Materials 2021-04-01

ONYEKWELU JC & OLUSOLA JA. 2014. Role of sacred grove in in-situ biodiversity conservation rainforest zone south-western Nigeria. Though groves were established for spiritual purposes, they are contributing to conservation. The role Nigeria was investigated Osun-Osogbo and Igbo-Olodumare compared with degraded primary forests. All trees (diameter at breast height (dbh) ≥ 10 cm) identified their dbh values measured each the 48 temporary sample plots 20 m × 40 m. Tree seedlings assessed within...

10.20935/al635 article EN Academia Letters 2021-05-31
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