Forest canopy resists plant invasions: a case study of<i>Chromolaena odorata</i>in Sal (<i>Shorea robusta</i>) forests of Nepal

Sharma, Lila Nath; Adhikari, Bhim; Watson, Mark; Shrestha, Bharat Babu; Paudel, Ekananda; Karna, Birendra; Rijal, Dilli Prasad

doi:10.1017/s0266467421000456

Cited by 8 publications

(4 citation statements)

References 59 publications

(80 reference statements)

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“…In relation to sustainable management of C. odorata , unraveling the ecological mechanisms responsible for its spread can be of paramount importance. In this context, the ecological studies on the effect of C. odorata in Sal ( Shorea robusta ) forest revealed that C. odorata cover was negatively correlated with the forest canopy cover (Sharma, Singh, et al, 2022; Sharma, Adhikari, et al, 2022). Therefore, sustenance of dense forest canopy cover can suppress the invasive spread of C. odorata .…”

Section: Sustainable Management Of C Odoratamentioning

confidence: 99%

“…In this vein, the distribution pattern of Chromolaena odorata (L.) R.M. King and H. Robinson or “Siam weed” and Lantana camara L. was studied in three Indian states using MaxEnt which showed that invasive spread of C. odorata was even more resilient toward climate change than L. camara (Sharma, Singh, et al, 2022; Sharma, Adhikari, et al, 2022). Herein, the dispersion dynamics and high invasive potential of C. odorata under the effect of climate change and multiple anthropogenic stressors can facilitate its abrupt range expansion in introduced global landscapes (Kishore et al, 2024).…”

Section: Introductionmentioning

confidence: 99%

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Ecological insights and environmental threats of invasive alien plant Chromolaena odorata: Prospects for sustainable management

Rai,

Singh

2024

Weed Biology and Management

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The Anthropocene witnessed the landscape spread of several invasive alien plants which can remarkably influence the ecosystem services and environmental sustainability. To this end, Chromolaena odorata (Asteraceae) is widely identified among top hundred pervasive invaders in view of its adverse influence on environment, agriculture, and wildlife. The adverse effects of C. odorata can further be exacerbated under the event of invasion interaction with other anthropogenic stressors such as climate change. Nevertheless, there exists dearth of pragmatic studies on invasion ecology, socio‐economic impacts, ecological economics, and sustainable management prospects of C. odorata. The present review discusses the invasion ecology, distribution, mechanisms, impacts, and management strategies of C. odorata invasion. The side‐effects and unsustainable use of traditional control measures (e.g., controlled fire and chemical herbicides) of C. odorata paves the way to biological control methods (e.g., gall fly). However, the control measures of C. odorata need to be assessed for their long‐term ecosystem level effects to mitigate the possible adverse environmental responses. The wise application of C. odorata biomass in marginal lands for soil fertility restoration, biosorption, biorefinery, bio‐medicine, and bioenergy in conjunction with ecological control measures can cover economic incentive to facilitate sustainable management of C. odorata in forestry/agroforestry systems. Nevertheless, the use of weed biomass as feedstock in biorefinery and ethno‐medicine may be inadequate in reducing its invasion. Future studies should explicitly elucidate the ecological mechanisms of C. odorata in concert with the quest for its field‐scale application in biorefinery to augment sustainable management.

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Section: Sustainable Management Of C Odoratamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ecological insights and environmental threats of invasive alien plant Chromolaena odorata: Prospects for sustainable management

Rai,

Singh

2024

Weed Biology and Management

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“…Consistent with the view that plant growth is often more affected by light intensity than by the levels of soil nutrients (Wei et al 2017), we found that the growth of C. odorata, P. grandis, and S. taccada did not signi cantly vary among P levels when the light intensity was low. Invasive plants with a low tolerance to shade nd it di cult to invade communities with high canopy closure (Sharma et al 2022).…”

Section: Low Light Intensity Inhibits the Invasion Of C Odorata On Tr...mentioning

confidence: 99%

High phosphorus availability and low light intensity resist the invasiveness of alien plant Chromolaena odorata on tropical coral islands

Huang

Liao

Liao³

et al. 2023

Preprint

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The vegetation and ecosystems of the Paracel Islands are extremely fragile and very difficult to restore after destruction. Chromolaena odorata is one of the most common invasive plants as guano phosphorus input constantly decreasing for islands, which has caused substantial harm to native vegetation on the Paracel Islands in recent years. In the current study, we investigated the growth and interspecific competition of C. odorata with the native species Pisonia grandis and Scaevola taccada as affected by light intensity and soil P content. The experiment, which was conducted in greenhouse, had two light intensities (full light or 10% light) and three levels of soil available phosphorus (P) content (53.89 mg·kg-1 low P, 253.89 mg·kg-1 medium P, and 1053.89 mg·kg-1 high P). The results showed that low light intensity significantly inhibited the growth of P. grandis, S. taccada, and C. odorata. However, compared with the low P treatment, the high P treatment significantly inhibited the growth of C. odorata and P. grandis, and significantly increased the growth of S. taccada under full-light conditions. The effect of soil P content on the interspecific competition between C. odorata, P. grandis, and S. taccada was affected by light intensity and plant species. Compared with the low and medium P treatments, the high P treatment significantly reduced the competitive advantage of C. odorata over P. grandis. The results demonstrate that shaded habitats with high soil P content could restrict invasion by C. odorata. This suggests that the invasion on tropical coral islands by C. odorata can be reduced by protecting the native vegetation (to increase shade) and seabirds (to increase soil P content).

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“…), along with other associated plants (Kumar & Saikia, 2021). Sal is a type of tree that is native to the Indian subcontinent (Sharma et al, 2022). It can be classified as deciduous, semi-deciduous, or evergreen.…”

Section: Introductionmentioning

confidence: 99%

Tree diversity and regeneration dynamics toward forest conservation and environmental sustainability: A case study from Nawabganj Sal Forest, Bangladesh

Jubair,

Rahman,

Sarmin

et al. 2023

JASE

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The objective of this study was to examine the regeneration dynamics and population structure of the most prevalent tree species, Shorea robusta (Sal), alongside four other dominant tree species (Tectona grandis, Syzygium cumini, Trema orientale, and Cassia fistula) in the Nawabganj Sal Forest in Bangladesh. The regeneration status and tree diversity of all documented tree species were assessed using a simple random sampling technique. Among the 30 species, 5 species (Shorea robusta, Tectona grandis, Trema orientale, Gmelina arborea, and Artocarpus heterophyllus) exhibited favorable regeneration state, whereas 15 species had moderate regeneration status. However, the absence of the condition 'no regeneration' was due to the absence of the adult stage, which resulted in the absence of seedlings and saplings. The quantity of seedlings was greater during the rainy season compared to the dry season. The girth class distribution of Shorea robusta and all other studied tree species combined exhibited a reverse J-shaped population curve. There was a decline in tree density as the girth class increased, and trees with a larger girth class accounted for 34 individuals per hectare, indicating a strong ongoing regeneration capability. The Shannon-Wiener diversity index, Simpson's dominance index, Pielou's evenness index, and Margalaf's species richness index had values of 0.223, 0.937, 0.077, and 2.249, respectively. These values imply a limited diversity of tree species in the examined forest. Shorea robusta has the highest dominance (m²/ha), followed by Tectona grandis (0.091), Syzygium cumini (0.087), Trema orientale (0.022), and Cassia fistula (0.008). The cumulative basal area of the tree species examined amounted to 40.04 m²/ha, with Shorea robusta accounting for 39.81 m²/ha. This indicates that Sal is the prevailing tree species in the forest. Nevertheless, this study offers fundamental data regarding the current condition of the tropical Sal Forest toward forest conservation and environmental sustainability.

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Forest canopy resists plant invasions: a case study ofChromolaena odoratain Sal (Shorea robusta) forests of Nepal

Cited by 8 publications

References 59 publications

Ecological insights and environmental threats of invasive alien plant Chromolaena odorata: Prospects for sustainable management

Ecological insights and environmental threats of invasive alien plant Chromolaena odorata: Prospects for sustainable management

High phosphorus availability and low light intensity resist the invasiveness of alien plant Chromolaena odorata on tropical coral islands

Tree diversity and regeneration dynamics toward forest conservation and environmental sustainability: A case study from Nawabganj Sal Forest, Bangladesh

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