Assessment Of Vertebrate Diversity In Alabata Nature Reserve Abeokuta, South-West Nigeria

ABSTRACT

The importance of wildlife, especially the vertebrates for game, tourism and medicinal use

cannot be over emphasized. Nature reserves are also known to influence the ecosystem of its

location. However, rapid increase in land use for agriculture and other physical developments

are gradually reducing wildlife habitation including the Alabata area nature reserve of

Abeokuta. Inventory of these resources in relation to their habitat parameters would inform

their better management. Assessments of vertebrate and associated flora diversities were

therefore carried out in Alabata Nature Reserve.

The study covered 20 km2 out of 97.3 km2 area of Alabata Nature Reserve. Twenty sample

plots each of 25m x 25m were laid randomly. Animals, vegetations, soil and level of human

interference were assessed for 24 months in each plot cutting across wet and dry seasons.

Animals were surveyed weekly using the King Census and Line Transect methods, by direct

and indirect modes. Vegetation was surveyed using the Point Center Quarter method. Soil

samples were collected randomly with auger at 0-15cm, 15-30cm and 30-45cm depth; airdried

and analysed for pH, Organic Carbon (OC), nitrogen and Particle Size (PS) distribution

using standard methods. Structured questionnaires were randomly administered to 20

residents in the farm settlements adjoining the study site to assess the level of human

interference. Data were analyzed using descriptive statistics, Dominance, Shannon Weiner,

principal component as well as Simpson, Evenness and Equitability indices.

Forty species of wild vertebrate belonging to thirty-one families were encountered at the

study site. Thryonomys swinderianus was the most abundant vertebrate species with a mean

frequency of 319±40.8, followed by Xerus erythropus (143±2.9) and Arvicanthus niloticus

(122±15.3) while Ploceus capensis (5±3.9) was the least abundant. Daniellia oliveri

(1123±4.6) was the most abundant tree species, followed by Anona senegalensis (270±3.9)

iii

and Bridelia micrantha (179±3.5). Mean soil pH value was 5.4±0.2 and 6.6±0.3 during the

wet and dry seasons respectively. The OC of the soil ranged from 13.2% to 66.8%, while

nitrogen content was from 0.8% to 7.5% and mean PS was from 3.2±0.2 to 90.4±4.5. Hunting

intensity was perceived to be low (20.0%), although burning due to stray fire was perceived

to be high (46.0%) in the site. The animal species diversity indices were Shannon Weiner

(0.6), Simpson Index (0.9), Evenness (0.4), Dominance (0.004) and Equitability (0.9) for the

wet season. and Shannon Weiner (0.6), Simpson Index (0.9), Evenness (0.4), Dominance

(0.005) and Equitability (0.9) for the dry season.The plant species diversity indices were

Shannon Weiner (0.6), Simpson Index (0.9), Evenness (0.5), Dominance (0.005) and

Equitability (0.9) for wet season and Shannon Weiner (0.6), Simpson Index (0.9), Evenness

(0.6), Dominance (0.9) and Equitability (0.9) for dry season. The principal component

analysis and ordination showed that the studied ecosystem was not stable.

Diversity of vertebrate species in Alabata Nature Reserve was high. Abundace of

Thryonomys swinderianus and Xerus erythropus can be attributed to adequate food and cover

provided by trees. However, wildfire which is the greatest threat has to be controlled for the

reserve to realize its full potentials.

Keywords: Wild vertebrate diversity, Alabata Nature Reserve, Wildfire, Wildlife habitat

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APA

LATEEF, S (2021). Assessment Of Vertebrate Diversity In Alabata Nature Reserve Abeokuta, South-West Nigeria. Afribary. Retrieved from https://afribary.com/works/assessment-of-vertebrate-diversity-in-alabata-nature-reserve-abeokuta-south-west-nigeria-2

MLA 8th

LATEEF, SHOTUYO "Assessment Of Vertebrate Diversity In Alabata Nature Reserve Abeokuta, South-West Nigeria" Afribary. Afribary, 12 Apr. 2021, https://afribary.com/works/assessment-of-vertebrate-diversity-in-alabata-nature-reserve-abeokuta-south-west-nigeria-2. Accessed 29 May. 2024.

MLA7

LATEEF, SHOTUYO . "Assessment Of Vertebrate Diversity In Alabata Nature Reserve Abeokuta, South-West Nigeria". Afribary, Afribary, 12 Apr. 2021. Web. 29 May. 2024. < https://afribary.com/works/assessment-of-vertebrate-diversity-in-alabata-nature-reserve-abeokuta-south-west-nigeria-2 >.

Chicago

LATEEF, SHOTUYO . "Assessment Of Vertebrate Diversity In Alabata Nature Reserve Abeokuta, South-West Nigeria" Afribary (2021). Accessed May 29, 2024. https://afribary.com/works/assessment-of-vertebrate-diversity-in-alabata-nature-reserve-abeokuta-south-west-nigeria-2