Abstract
Secondary forests may act as buffer area and serve as reservoir for biotic components that are lost from primary forest due to anthropogenic disturbances. This study investigated the floristic composition, diversity and community structure of Cocoa Research Institute of Nigeria (CRIN), Idi-Ayunre, Ibadan, Nigeria. Twenty-five main plots (each 50 m × 50 m) were randomly mapped out to enumerate tree species, five 10 m × 10 m sub-plots were systematically mapped out within each main plot to enumerate shrubs and three quadrats (1 m × 1 m) were laid in each sub-plot to enumerate herbaceous species in Wet Season (WS) and Dry Season (DS). Relative Importance Value (RIV), Taxa, Individuals, Dominance, Shannon-Wiener, Equitability and Jaccard similarity index were determined. A total of 181 plant species from 145 genera and 54 families which included 63 trees, 33 shrubs and 85 herbaceous species were enumerated. In wet season, Triplochiton scleroxylon, Lonchocarpus griffonianus and Chromolaena odorata had the highest RIV while in dry season, Terminalia superba, Lonchocarpus cyanescens and C. odorata were the highest for trees, shrubs and herbs, respectively. Low dominance but high equitability and Shannon-Weiner values indicated inter-specificity among trees, shrubs and herbs. It was only in herbs that Jaccard-similarity was less than 100% across seasons. Resilience for keystone species conservation is possible due to flora species heterogeneity of the study site. Key words: Forest ecosystem, biodiversity, anthropogenic activities, relative importance value, ecosystem services.
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Claims 9
Claim · model-written summary
A total of 181 plant species were enumerated in the secondary rainforest in Ibadan.
Verbatim
e1“A total of 181 plant species from 145 genera and 54 families which included 63 trees, 33 shrubs and 85 herbaceous species were enumerated”
e6“Cocoa Research Institute of Nigeria (CRIN), Idi-Ayunre, Ibadan, Nigeria”
Claim · model-written summary
Triplochiton scleroxylon had the highest relative importance value among trees in the wet season.
- Taxon
- Triplochiton scleroxylon
Triplochiton scleroxylone2 - Outcome
- RIVe0
- Direction
- higheste2
- Qualifier
- In wet seasone2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative Importance Value (RIV)”
e2“In wet season, Triplochiton scleroxylon, Lonchocarpus griffonianus and Chromolaena odorata had the highest RIV”
Claim · model-written summary
Lonchocarpus griffonianus had the highest relative importance value in the wet season.
Verbatim
e0“Relative Importance Value (RIV)”
e2“In wet season, Triplochiton scleroxylon, Lonchocarpus griffonianus and Chromolaena odorata had the highest RIV”
Claim · model-written summary
Chromolaena odorata had the highest relative importance value in the wet season.
- Taxon
- Chromolaena odorata
Chromolaena odoratae2 - Outcome
- RIVe0
- Direction
- higheste2
- Qualifier
- In wet seasone2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative Importance Value (RIV)”
e2“In wet season, Triplochiton scleroxylon, Lonchocarpus griffonianus and Chromolaena odorata had the highest RIV”
Claim · model-written summary
Terminalia superba had the highest relative importance value among trees in the dry season.
- Taxon
- Terminalia superba
Terminalia superbae3 - Outcome
- RIVe0
- Direction
- higheste3
- Qualifier
- in dry seasone3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative Importance Value (RIV)”
e3“in dry season, Terminalia superba, Lonchocarpus cyanescens and C. odorata were the highest for trees, shrubs and herbs, respectively”
Claim · model-written summary
Lonchocarpus cyanescens had the highest relative importance value among shrubs in the dry season.
- Taxon
- Lonchocarpus cyanescensPhilenoptera cyanescense3
- Outcome
- RIVe0
- Direction
- higheste3
- Qualifier
- in dry seasone3
Verbatim
e0“Relative Importance Value (RIV)”
e3“in dry season, Terminalia superba, Lonchocarpus cyanescens and C. odorata were the highest for trees, shrubs and herbs, respectively”
Claim · model-written summary
C. odorata had the highest relative importance value among herbs in the dry season.
- Taxon
- C. odorataChromolaena odoratae3
- Outcome
- RIVe0
- Direction
- higheste3
- Qualifier
- in dry seasone3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative Importance Value (RIV)”
e3“in dry season, Terminalia superba, Lonchocarpus cyanescens and C. odorata were the highest for trees, shrubs and herbs, respectively”
Claim · model-written summary
Trees, shrubs and herbs showed low dominance and high equitability and Shannon-Weiner values, indicating inter-specificity.
Verbatim
e4“Low dominance but high equitability and Shannon-Weiner values indicated inter-specificity among trees, shrubs and herbs”
Claim · model-written summary
Only herb communities had Jaccard similarity below 100% across seasons.
Verbatim
e5“It was only in herbs that Jaccard-similarity was less than 100% across seasons”