Density and diversity of birds in the wetlands of Yankari Game Reserve Bauchi Nigeria

Omotoriogun, Taiwo Crossby; Onoja, Joseph; Tende, Talatu; Manu, Shiiwua A.; Ottosson, Ulf

doi:10.3126/jowe.v5i0.4778

Cited by 3 publications

(3 citation statements)

References 50 publications

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“…The variation in the distribution of waterbirds in different habitats is attributed to prime habitat preference: "Each species may have a different habitat preference and feed throughout this habitat on all kinds of food, or all the species may share the entire habitat with each species feeding on a variety of food in the different situation within the habitat" (Onoja et al 2011). Many studies have demonstrated the importance of habitat heterogeneity in wetland bird richness and abundance (Gonzalez-Gajardo et al 2009).…”

Section: Discussionmentioning

confidence: 99%

Waterbird assemblage along Punatsangchhu River, Punakha and Wangdue Phodrang, Bhutan

Nima¹,

Dorji

2022

J. Threat. Taxa

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Crossing Bhutan is one of the shortest transits, and Bhutan holds the main breeding refuge/habitats for many Central Asian migratory birds. Our study assessed the community structure of waterbirds along the Punatsangchhu River basin, located towards the western part of Bhutan. The study determined the species composition, habitat use and preference of waterbirds, together with the different habitats present. Furthermore, the study examined the potential drivers of habitat fragmentation along the river. The entire study area was classified into five different habitats: dam, dredged area, farmland, urban, and pristine. The Cummings method of habitat assessment for high gradient river and streams was used to assess the habitat variables such as bank stability, vegetative protection and the riparian vegetation zone along the river and the association with the diversity of aquatic birds. A questionnaire survey was also used to evaluate the degree of threats caused by human disturbances. Among the five habitats, the dam area recorded the highest diversity (H` = 2.13) against their total count of 103 (8.7%) and the least diversity was recorded from farmland area (H` = 1.1) against their total count of 282 (23.8%) birds. Most waterbirds preferred an open area with shallow river depth. Habitats with emergent vegetation negatively correlated with the waterbird species composition. The study also recorded one Vulnerable species Aythya ferina, one Near Threatened species Vanellus duvaucelii, and one Endangered species Haliaeetus leucoryphus. Punatsangchhu is a major habitat to both resident and migratory waterbirds which stop here enroute from the Palaearctic and Indo-Malayan Region corroborating the need for habitat conservation and management regimes in the basin.

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Section: Discussionmentioning

confidence: 99%

Waterbird assemblage along Punatsangchhu River, Punakha and Wangdue Phodrang, Bhutan

Nima¹,

Dorji

2022

J. Threat. Taxa

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“…Having a rich fauna diversity that includes scores of charismatic native species e.g., West African Lion (Panthera leo leo), African Buffalo (Syncerus caffer brachyceros), Hippopotamus (Hippopotamus amphibius), Roan Antelope (Hippotragus equinus), and Hartebeest (Alcelaphus buselaphus major) (Afolayan and Ajayi 1980); Bergl et al 2011; (Omotoriogun et al 2011), Yankari is the prime destination for ecotourists in Nigeria -a top priority of the current management (Olokesusi 1990).…”

Section: Study Sitementioning

confidence: 99%

Habitat selection by Stone Partridge elucidates the ecological benefits of fire management in an Afro-tropical Sudan Savanna

Atuo,

Agaigbe,

Thompson

2023

Preprint

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Background Fire is a key disturbance measure that drives community dynamics and ecosystem function. While natural resource managers have increasingly relied on fire as a management tool to conserve biodiversity in fire-prone systems, key gaps remain in our understanding of how fire frequencies and return intervals drive habitat selection and species persistence in tropical savannas. Here, we evaluated the mechanisms through which fire-created variability mediates habitat selection in a fire-prone Sudan savanna landscape. Using data from adult stone partridges fitted with radio-transmitters and monitored between November 2020 – July 2022, we assessed the role of fire frequency, fire intensity, and vegetation characteristics on space used by Stone Partridge (Ptilachapus petrosus) at two spatial extents. Results At a broad spatial extent, partridges appeared to select recently burnt areas up to 2 years post-fire treatment but decreased their selection as the severity of fires increased. Partridges tended to avoid taller woody vegetation that could serve as perches for aerial predators in favor of shrubs (< 1-m tall) with thicket understories that minimized predation risk. At a smaller spatial extent, partridges were inclined to select patches that experienced recent fires but maintained high tussock density coupled with litter cover. The relationship between Stone Partridge selection and grass height was inconclusive but suggested a possible reduction in usable space in patches where herbaceous vegetation exceeded 0.5-m. Conclusion Our results suggest that Afro-tropical savanna obligates like partridges are possibly adapted to frequently occurring low-intensity fires that promote diversity of herbaceous plants, remove non-native vegetation, and create pockets of refugia for native species to hide from predators. Consequently, reversing colonial fire suppression policies and adopting planned fire treatment as part of management efforts in the region could be key in improving habitat quality for ground-dwelling birds and other native species.

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“…The northern Nigeria sites are within the northern Guinea Savannah vegetation zone characterized by a mixture of trees and grass and receives annual rainfall of between 600 and 1,000 mm per mostly concentrated within 5-7 months (Ezealor, 2001;Omotoriogun et al, 2011;Braimoh et al, 2018). The southern sites are within the Guinea Forest vegetation zone characterized by dense evergreen forest of tall trees with thick undergrowth and receives annual rainfall of between 1,500 and 2,000 mm per annum with about 6-8 months of rainfall (Ezealor, 2001;Adeyanju et al, 2014;Awoyemi et al, 2020).…”

Section: Study Sitesmentioning

confidence: 99%

Bergmann’s Rule Holds in Birds Inhabiting Southern Guinea Forests but Not in the Northern Savanna of Nigeria

Barshep¹,

Awoyemi

Abalaka³

et al. 2022

Front. Ecol. Evol.

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The Bergmann’s rule predicts that in endotherms, body sizes will differ with respect to thermal gradients. Larger bodied individuals will inhabit colder environments while in warmer environments, individuals will be smaller-bodied. This hypothesis has been proved and disproved many times due to inconsistencies in body size differences along latitudinal gradients. We tested this hypothesis in 30 Afrotropical resident bird species inhabiting two vegetation types at different latitudes (southern guinea forests and northern savanna) and at different altitudes in Nigeria, West Africa. Using principal component analyses of body mass and wing length, the first principal component, the component of size, indicated that individuals in montane areas were larger than lowland populations in southern guinea forests. However, in the northern guinea savanna, there was no significant difference in body sizes between lowland and montane populations. General linear models show that body size increases as temperature decreases. In species found in both southern guinea forests and northern savanna (i.e., African Thrush Turdus pelios and Snowy-crowned Robin Chat Cossypha niveicapilla), variations in body sizes were significantly dependent on sites. Our study indicates that other macro-scale factors such as vegetation and rainfall patterns might modulate conformity to Bergmann’s rule in Afrotropical environments.

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Density and diversity of birds in the wetlands of Yankari Game Reserve Bauchi Nigeria

Cited by 3 publications

References 50 publications

Waterbird assemblage along Punatsangchhu River, Punakha and Wangdue Phodrang, Bhutan

Waterbird assemblage along Punatsangchhu River, Punakha and Wangdue Phodrang, Bhutan

Habitat selection by Stone Partridge elucidates the ecological benefits of fire management in an Afro-tropical Sudan Savanna

Bergmann’s Rule Holds in Birds Inhabiting Southern Guinea Forests but Not in the Northern Savanna of Nigeria

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