Nucleation by isolated emergent native trees can push back the shade-intolerant invader Broussonetia papyrifera (L.) L'Hér. ex Vent.

Olupot, William; Isabirye–Basuta, Gilbert

doi:10.1016/j.tfp.2022.100220

Cited by 2 publications

(5 citation statements)

References 53 publications

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“…As in the case of B. papyrifera , whose spread in this reserve has been shown to be facilitated by human disturbance (Olupot, 2022; Olupot & Isabirye‐Basuta, 2022), results from this study have shown that human disturbances promote all the species determined to be invasive. Therefore, the passive action of controlling human disturbance is important.…”

Section: Conclusion and Recommendationssupporting

confidence: 55%

“…First, the observations are from a protected area. Available reports from countries in which the species have been reported as invasive do not consistently distinguish sites as protected or unprotected, and if protected whether forest or sa- As in the case of B. papyrifera, whose spread in this reserve has been shown to be facilitated by human disturbance (Olupot, 2022;Olupot & Isabirye-Basuta, 2022), results from this study have shown that human disturbances promote all the species determined to be invasive. Therefore, the passive action of controlling human disturbance is important.…”

Section: Con Clus Ion and Recommendationsmentioning

confidence: 63%

“…Most of the formerly disturbed sites are currently dominated by the paper mulberry ( Broussonetia papyrifera [L.] Vent.) (Olupot, 2022; Uganda Ministry of Water and Environment, 2017), an invasive exotic species which has been a focus of various studies in relation to its impact on native species regeneration (Olupot, 2022; Olupot & Isabirye‐Basuta, 2022; Stoderegger, 2018; Yamungu, 2020). Ongoing illegal timber and non‐timber forest product harvesting are a major concern (Olupot, 2022; Olupot & Isabirye‐Basuta, 2016; Olupot & Sande, 2019; Sande et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

“…The reserve is situated between 0′24′-0′35′N and 32′52′-33′07′E (Uganda Forest Department, 1996). The study is one in a series currently being undertaken to determine and address the restoration needs of the reserve (Olupot, 2021(Olupot, , 2022Olupot & Isabirye-Basuta, 2022;Olupot & Sande, 2019). The main block of this reserve occupies an area of approximately 300 km 2 .…”

Section: Study Sitementioning

confidence: 99%

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Undocumented invasive exotic woody plants of Mabira Central Forest Reserve, Uganda

et al. 2022

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Invasive exotic species are problematic to biodiversity conservation. However, the knowledge of exotic invaders in tropical forests remains limited. Lessons from sites elsewhere suggest that the problem could be worse than is known. To increase our understanding of this problem, we surveyed exotic woody plants in Mabira Central Forest Reserve, Uganda. The site has a long history of anthropogenic disturbance.Seven woody exotic species were encountered, three of which had population structures indicative of invasiveness and distributions suggestive of the early stages of invasion. One of these species Senna spectabilis (DC.) H.S.Irwin & Barneby was localised to an 8.6 ha site north of the reserve. Terminalia superba Engl. & Diels occurred mainly in an 8.7 ha patch south of the reserve, while Artocarpus heterophyllus Lam.was more widely distributed. T. superba has been reported to be invasive in two other countries, but it is not yet clear whether or not the reported invasions are occurring in protected forests. A. heterophyllus is reported to be invasive in various countries, yet rarely quantitatively demonstrated outside the Brazilian Atlantic forests. S. spectabilis

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Section: Conclusion and Recommendationssupporting

confidence: 55%

Section: Con Clus Ion and Recommendationsmentioning

confidence: 63%

Section: Methodsmentioning

confidence: 99%

Section: Study Sitementioning

confidence: 99%

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Undocumented invasive exotic woody plants of Mabira Central Forest Reserve, Uganda

et al. 2022

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“…Favorable influence on woody recruits is also associated with individual trees and not only plantations. In Uganda, isolated trees facilitated native seedling abundance likely due to inhibition of the invader shrub Broussonetia papyrifera (Olupot & Isabirye‐Basuta 2022). Likewise, individuals of the native shrub Baccharis prunifolia increased the richness and abundance of forest assemblages at 3,200 m above sea level in Venezuela, as a result of temperature regulation (Bueno & Llambí 2015).…”

Section: Discussionmentioning

confidence: 99%

Trade‐offs at applying tree nucleation to restore degraded high Andean forests in Colombia

Barrera-Cataño

Garibello

Moreno‐Cárdenas

et al. 2022

Restoration Ecology

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Tree islands, the more recognizable type of applied nucleation, and passive restoration have been proven as cost‐effective restoration strategies. Comparison between them is a priority, particularly through paired experiments in ecosystems wherein restoration research is scarce, such as high forest in the northern Andes (high Andean forests [HAF]). This ecosystem is important given its environmental benefits but also because vegetation development is more limited by abiotic conditions, unlike tropical moist forests. To address these gaps, we set up an experiment in a logged pine plantation comparing the effect of nuclei and passive restoration on vegetation structure and diversity as well as natural regeneration. In this case, we divided emergent shoots into three functional groups related to restoration goals: invasive herbs, páramo species, and woody recruits. After 3 years, nuclei had higher coverage, height, and diversity, but this was exclusively due to planted trees, as nuclei did not affect the abundance of invasive herbs and páramo species. More importantly, the abundance and richness of woody recruits were kept low and constant under nuclei, likely as a by‐product of plantation density. Conversely, it gradually increased at passive restoration plots. Since nuclei contribute to structure and diversity and passive restoration contributes to woody recruits, we propose a combination of both to restore HAF. Possible changes in the direction of the interaction between planted trees and recruits confirm the need for long‐term monitoring to accurately determine the potential of tree nuclei in HAF.

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Nucleation by isolated emergent native trees can push back the shade-intolerant invader Broussonetia papyrifera (L.) L'Hér. ex Vent.

Cited by 2 publications

References 53 publications

Undocumented invasive exotic woody plants of Mabira Central Forest Reserve, Uganda

Undocumented invasive exotic woody plants of Mabira Central Forest Reserve, Uganda

Trade‐offs at applying tree nucleation to restore degraded high Andean forests in Colombia

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