Diversity, population structure and regeneration status of woody species in different habitats in Maun Educational Park, northern Botswana

Kashe, Keotshephile; Teketay, Demel; Heath, Alison; Mmusi, Mmusi; Mathope, Tumisang; Galelebalwe, Meleko Khululo; Tsholofelo, Chief; Mpofu, Charles

doi:10.1080/13416979.2021.1896069

Cited by 3 publications

(2 citation statements)

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“…Croton megalobotrys was likewise, the second most dominant species in Shorobe and Seronga. This species exhibited poor recruitment, probably due to herbivory and predation on seeds and seedlings by invertebrates and rodents (Kashe et al, 2021). A similar pattern was reported by Neelo et al (2015), Tsheboeng et al (2017) and Teketay et al (2018).…”

Section: Discussionsupporting

confidence: 76%

“…Assessment of patterns of species population structure yields insights into their recruitment and regeneration status, as well as the viability status of the different species that could inform conservation and management strategies (Teketay, 2005;Tesfaye et al, 2010). Different patterns of species population structure have been reported for various species in other woodlands in northern Botswana (Neelo et al, 2015;Tsheboeng et al, 2017;Teketay et al, 2018;Kashe et al, 2021). In the current study, the woody seed oil species assessed exhibited significant variations in their diameter-class distributions, implying differences in the overall regeneration status among species.…”

Section: Discussionmentioning

confidence: 67%

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Structure and Regeneration Status of Woody Seed Oil Species in Northern Botswana

Kashe,

Tsheboeng,

Kgathi

et al. 2023

Journal of Landscape Ecology

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Concerns about energy security and environmental risks have sparked interest in edible and non-edible seed oils as potential renewable feedstocks for biodiesel production. A study was conducted to investigate the population structure and regeneration status of woody seed oil species in the districts of Chobe and Ngamiland. The population structure and regeneration condition of woody seed oil species were studied in 20 × 20 m (400 m2) quadrats spaced 50 m apart along a parallel line transect. Data on the identity of all woody species, the number of all live individuals, and the diameter at breast height (DBH) of individuals with DBH > 2 cm of each woody species were collected in each quadrat. The diversity (Hʹ) and evenness (Jʹ) of woody seed oil species were 1.53, 1.42 and 0.71, and 0.85, 0.73 and 0.51 in Parakarungu, Seronga and Shorobe, respectively. Ximenia caffra was the dominant woody seed oil plant in Shorobe and Seronga, and exhibited an inverted J-shaped curve with continuous diameter classes distribution. Trichilia emetica was only found in Parakarungu, where it was the second dominant species and demonstrated excellent recruitment and regeneration. In Shorobe and Seronga, Croton megalobotrys was the second most dominant species. It had low recruitment, which was most likely due to herbivory and predation on seeds and seedlings. The least prevalent species (Sclerocarya birrea, Schinziophyton rautanenii and Guibourtia coleosperma) had no representation in the intermediate diameter-classes, which might be attributed to the selective removal in these diameter-classes. The examination of the population structure of woody seed oil species indicated variations in patterns of diameter-class distribution, indicating differences in the population dynamics of the species across the study areas. The least dominant species experienced hindered recruitment and regeneration due to herbivory and anthropogenic influences.

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Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 67%

Structure and Regeneration Status of Woody Seed Oil Species in Northern Botswana

Kashe,

Tsheboeng,

Kgathi

et al. 2023

Journal of Landscape Ecology

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Diversity, stand and population structure of riparian woody species in two contrasting land use types in the distal Okavango Delta, Northwestern Botswana

Tsheboeng,

Teketay,

Murray-Hudson

et al. 2024

Trop Ecol

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Land use change threatens the integrity of riparian woodland vegetation. The aim of this study was to investigate the diversity and population structure of riparian plant species in protected and communal areas. A total of 71 transects were sampled from each of the protected and communal areas. Total species richness recorded was 36 and 38 in communal and protected areas, respectively. Species diversity was significantly (p < 0.05) higher in the protected than communal areas. Vachellia tortilis (communal areas) and Croton megalobotrys (both areas) showed a reverse J shaped pattern with more individuals in the lower diameter size classes than in the large ones. Dichrostachys cinerea (both areas), Ziziphus mucronata (communal areas), Combretum imberbe (protected areas), C. hereroense (protected areas), Berchemia discolor (protected areas) and Vachellia erioloba (communal areas) showed a reverse-J distribution pattern, but with missing size classes. Philenoptera violacea (protected areas) was characterized by a bell-shaped distribution with more individuals in the middle size classes than in the lower and upper ones while Combretum hereroense, C. imberbe and B. discolor were characterized by irregular population structure in communal areas. Croton megalobotrys, D. cinerea, C. imberbe, C. hereroense, Z. mucronata, B. discolor and S. erubescens had higher Important Value Indices (IVIs) in protected than communal areas. Comparatively, Vachellia tortilis, P. violacea and V. erioloba had higher IVIs in communal than protected areas. We recommended that species with J-shaped population structure and those with only one size class be protected to enable them to attain healthy population structures.

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Floristic composition and diversity at Keruing (Dipterocarpus spp.) habitat in Tangkahan, Gunung Leuser National Park, Indonesia

Susilowati

Rachmat²,

Elfiati

et al. 2021

Biodiversitas

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Abstract. Susilowati A, Rachmat HH, Elfiati D, Hidayat A, Hadi AN, Zaitunah A, Nainggolan D, Ginting IM. 2021. Floristic composition and diversity at Keruing (Dipterocarpus spp.) habitat in Tangkahan, Gunung Leuser National Park, Indonesia. Biodiversitas 22: 4448-4456. Dipterocarpus spp., or locally known as Keruing, is a wood-producing tree and has high economic value. Keruing also produces derivative products in oil and oleoresin, which are widely used as raw materials for medicines and perfumes. Keruing natural population has been severely declining caused by habitat alteration and also over exploitation. Therefore, information on the composition and diversity of the floristic community at their habitat is important as an initial step in designing conservation actions. This study aims to determine the floristic composition and diversity at the keruing habitat in the Tangkahan area, Gunung Leuser National Park (Gunung Leuser NP). A line transect has been used to establish a purposive sampling in particular forest areas where the population of the keruing is known to grow naturally. Four line transects, each with five nested plots, totaling 110 plots, were established to gather data at four growth stages. The results found 47 species at the seedling stage, 43 species at the sapling stage, 48 species at the pole stage and 65 species at the tree stage. There were three species of keruing in the research location, namely Dipterocarpus haseltii, Dipterocarpus costulatus and Dipterocarpus elongatus Korth with low IVI values ??at each stage. D. haseltii was only found at the seedling, pole and tree stage with IVI values ??of 0.32, 0.30, and 6.90, respectively. D. costulatus was only found at the tree level with an IVI value of 3.43, while D. elongatus found at the sapling and tree stage with an IVI of 0.30 and 3.42, respectively. The diversity index in the research location was in the medium category at the seedling, sapling, and pole levels with a value of 2.96, 2.86, and 2.92, respectively and was classified as high at the tree level with a value of 3.18. The evenness index (E') in all growth stages is high or evenly distributed with the value of E' > 0.75. The species diversity in research location classified into medium-high category although in each stage showing dynamic on species domination. Disturbed habitat due to illegal logging and land conversion caused a problem on keruing regeneration. Conservation efforts, including active monitoring keruing occurrence, ex-situ conservation, and artificial regeneration, are needed to avoid keruing from extinction.

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Diversity, population structure and regeneration status of woody species in different habitats in Maun Educational Park, northern Botswana

Cited by 3 publications

References 50 publications

Structure and Regeneration Status of Woody Seed Oil Species in Northern Botswana

Structure and Regeneration Status of Woody Seed Oil Species in Northern Botswana

Diversity, stand and population structure of riparian woody species in two contrasting land use types in the distal Okavango Delta, Northwestern Botswana

Floristic composition and diversity at Keruing (Dipterocarpus spp.) habitat in Tangkahan, Gunung Leuser National Park, Indonesia

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