The impact of <i><scp>B</scp>roussonetia papyrifera</i> (<scp>L</scp>.) vent. on community characteristics in the forest and forest–savannah transition ecosystems of Ghana

Bosu, Paul P.; Apetorgbor, M. M.; Nkrumah, Elvis E.; Bandoh, Kwabena P.

doi:10.1111/aje.12063

Cited by 26 publications

(20 citation statements)

References 14 publications

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“…Furthermore, Bahati et al (2008) also reported a 30% cover abundance MFR by this tree species. Broussonetia papyrifera tree species has a tendency towards hampering the abundance of other indigenous broadleaf species growing in association with it (Bosu et al, 2013),hence can be considered as an invasive species.…”

Section: Discussionmentioning

confidence: 99%

Implication of forest zonation on tree species composition, diversity and structure in Mabira Forest, Uganda

Weldemariam¹,

Jakisa²,

Ahebwe³

2017

Environ. Earth Ecol.

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The study aimed to investigate effectiveness of forest management zoning in conserving biodiversity of Mabira forest reserve. The study sites buffer, production, and strict nature reserve management zones were purposively selected. This was undertaken through investigating woody species diversity, composition and structure. A total of 60 sampling plots with a size of 20 m x10 m were used to collect vegetation data. Variables such as woody plant species identification and counts as well as diameter at breast height (DBH) of trees were done. The result depicted a total of 65 woody species; 39 in buffer, 19 in productions and 37 in strict nature reserve. Of these, only 9 trees species were found common to all zones and their Sorensen similarity coefficient was 0.2213. The population structure of the buffer and strict nature reserve zones was found to be a J -shape pattern, whereas the production zone shown an inverted J-shape pattern. Higher woody species diversity was depicted in the buffer and strict nature zones with (H'=2. 73512) and (H'=2. 68412) respectively, and lower in a production zone (H'=1. 63628). The evenness index value of a buffer zone was (J =0. 746574), strict nature (J= 0.743335) and production (J=0. 555719). The production zone had shown higher IVI values followed by buffer and strict nature reserve zone. The most important woody species identified based on their IVI value were Broussonetia papyrifera (Production), Acalypha neptunica (Buffer), Funtumia Elastica (strict nature reserve). The existing forest management is effective in conserving the biodiversity of the forest reserve. Nevertheless, the production zone was still suffering from exploitation of the surrounding community, hence serve for protecting the remaining management zones from further human interference. Further investigation is also required on the adjacent community perceptions of the forest management zoning.

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Section: Discussionmentioning

confidence: 99%

Implication of forest zonation on tree species composition, diversity and structure in Mabira Forest, Uganda

Weldemariam¹,

Jakisa²,

Ahebwe³

2017

Environ. Earth Ecol.

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“…B. papyrifera is a shade‐intolerant species, and thus competes with native pioneers for similar resources and space; its superior reproduction, survival and growth traits increase its competitiveness and dominance over native pioneer species (Bosu et al. ). For instance, B. papyrifera grows rapidly, and at maturity, its canopy can create deep shade, which may suppress establishment and growth of native pioneers (Apetorgbor & Bosu ; Bosu et al.…”

Section: Discussionmentioning

confidence: 99%

“…For instance, B. papyrifera grows rapidly, and at maturity, its canopy can create deep shade, which may suppress establishment and growth of native pioneers (Apetorgbor & Bosu ; Bosu et al. ). Moreover, B. papyrifera regenerates from seed, suckers and stumps (Sheil & Van Heist ; Kyereh et al.…”

Section: Discussionmentioning

confidence: 99%

Vegetation assessment of native tree species in Broussonetia papyrifera‐dominated degraded forest landscape in southern Ghana

Agyeman

Addo-Danso

Kyereh

et al. 2016

Applied Vegetation Science

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Abbreviations F = Farmland; FU = Forest understorey; LGB = Large canopy gaps dominated by Broussonetia papyrifera; LGC = Large canopy gaps dominated by Chromolaena odorata; LR = Logging road; MAP = Mansonia altissima plantation; MDT = Modified Taungya System; NDP = Nauclea diderrichii plantation; NPLD = Non-pioneer light-demander; P = Pioneer; SB = Shade-bearer; ST = Skid trail; TIP = Terminalia ivorensis plantation. Abstract Question: Does the invasive tree species Broussonetia papyrifera facilitate the natural regeneration of native tree species in a degraded tropical forest landscape? Location: Afram Headwaters Forest Reserve, southern Ghana.Methods: We established sampling areas and assessed seedlings and saplings <5 cm DBH in nine habitats. The habitats were logging road, skid trail, large canopy gaps dominated by B. papyrifera, large canopy gaps dominated by invasive Chromolaena odorata, Nauclea diderrichii plantation, Mansonia altissima plantation, Terminalia ivorensis plantation, abandoned farmland and unlogged forest.Results: We found that the abundance of pioneers declined with increasing abundance of B. papyrifera. This trend was more pronounced in the farmland and in the N. diderrichii plantation. By contrast, increased abundance of B. papyrifera did not lead to a decrease in the abundance of the shade-tolerant species. B. papyrifera seedlings and saplings were absent in the forest understorey. We also found a lower abundance and richness of some vulnerable tree species and valuable timber species in the N. diderrichii plantation and in gaps dominated by B. papyrifera. However, we recorded both shade-tolerant and shade-intolerant species in the gaps dominated by B. papyrifera. Conclusions:We found both shade-tolerant and shade-intolerant species in the B. papyrifera-dominated gaps. This can provide a basis for future studies to explore the potential of such tree species in restoration programmes targeted at B. papyrifera-invaded sites. Our results also suggest that the integrity of the undisturbed forest patches in the landscape must be protected to help prevent B. papyrifera from spreading further. We suggest further studies should be conducted at replicated sites with a similar habitat that represent varying levels of invasion by B. papyrifera to draw conclusions regarding the species' potential to facilitate regeneration of native tree species.

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“…Broussonetia papyrifera is a light-demanding tree that colonizes forest gaps and is eliminated when gaps close up. In Africa, it is an invasive alien species that reduces cover of native species, but does not seem to reduce overall species richness of forests (Bosu et al 2013). Broussonetia papyrifera accounted for 56 percent of all seeds and was particularly abundant aboveground in the younger secondary stands (mean 4.6 individuals per plot, SD 4.7), but was even present at low density in the older growth (mean 1.0 individual per plot, SD 0.9) despite being relatively recently introduced (not mentioned in extensive surveys made in 1993-1994 by J. Lwanga and others; Davenport et al 1996).…”

Section: Discussionmentioning

confidence: 99%

The Seed and Fern Spore Bank of a Recovering African Tropical Forest

et al. 2014

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Seed banks contribute to forest regeneration after disturbance, but less is known about fern spore banks, particularly in a paleotropical context. We sampled the buried seed and fern spore bank in Mabira Forest, a 300 km 2 forest in central Uganda, to explore the effect of time since disturbance. Soil cores (5 cm depth) were taken from 39 plots across three different classes of 'recovery': (1) not disturbed since 1950; (2) logged between 1950 and 1980; and (3) cleared for agriculture between 1970 and 1990 but reforested since. Plant emergence was monitored in a glasshouse. We predicted that the seed bank would reflect time since disturbance, with more pioneer species in recently disturbed stands, and that the fern spore bank would reflect stand age less closely due to greater dispersal capacity. We recorded a median 752 seeds per square meter, most of which were trees; the most abundant species was the invasive tree Broussonetia papyrifera. The fern spore bank was twice as dense, but 95 percent of fern spores were of one species, Christella parasitica. Tree seed density was significantly affected by time since disturbance with fewer seeds in the older stands. Herb seed density, fern spore density, and species richness for all groups were not significantly affected by time since disturbance. Neither seed bank nor fern spore bank closely resembled the aboveground vegetation. We compared our results to existing literature on seed banks in tropical forests, finding that our densities are relatively high for African forests, but low compared to the Neotropics and Australia.Abstract in French is available in the online version of this article.

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The impact of Broussonetia papyrifera (L.) vent. on community characteristics in the forest and forest–savannah transition ecosystems of Ghana

Cited by 26 publications

References 14 publications

Implication of forest zonation on tree species composition, diversity and structure in Mabira Forest, Uganda

Implication of forest zonation on tree species composition, diversity and structure in Mabira Forest, Uganda

Vegetation assessment of native tree species in Broussonetia papyrifera‐dominated degraded forest landscape in southern Ghana

The Seed and Fern Spore Bank of a Recovering African Tropical Forest

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