Does the removal of Lantana camara influence eucalypt canopy health, soil nutrients and site occupancy of a despotic species?

Lambert, Kathryn T. A.; Reid, Nick; McDonald, Paul G.

doi:10.1016/j.foreco.2017.03.021

Cited by 9 publications

(3 citation statements)

References 33 publications

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“…Trees were most dense in uninvaded reforested areas, and least dense in areas that were previously and currently invaded by Lantana . The low density of the small size classes in invaded areas could be due to Lantana limiting seedling recruitment by competing for light, nutrients and space, as well as putative allelopathic effects (Gooden et al, 2009; Lambert et al, 2017; Prasad, 2012; Shackleton et al, 2017). The present study confirms the general suppressive effect of Lantana invasion on biodiversity and ecosystem functioning (Dobhal et al, 2011; Omeja et al, 2011; Ruwanza, 2020).…”

Section: Discussionmentioning

confidence: 99%

The effects of the invasive species, Lantana camara, on regeneration of an African rainforest

et al. 2023

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Invasive plants adversely affect native communities by altering ecosystem function and disrupting natural regeneration. We investigate the effect of invasive Lantana camara L. (Verbenaceae) on forest regeneration in Kibale National Park, Uganda. We appraise the efficacy of cutting and uprooting Lantana for promoting native tree recruitment. Sample plots comprised three types: (i) currently invaded by Lantana; (ii) cleared of Lantana and now managed; and (iii) forest reference plots uninvaded by Lantana. Tree species numbering 51, 19 shrubs, and 17 herb species were identified.Lantana reduced tree, shrub, and herb cover and diversity, and suppressed tree regeneration. The short-term management of Lantana did not promote tree establishment.The tree community in cleared areas was not converging on uninvaded adjacent forest. Lantana is known to allelopathically suppress tree seedling establishment, but even at sites cleared of Lantana, tree species recruitment was poor. While insufficient time may have passed for tree recruitment, we argue that an increase in shrub and herb cover and diversity arrested forest tree regeneration. Sustained follow-up clearing of dense secondary shrubs and herbs and resprouted L. camara in cleared areas is key to ensuring long-term recovery of the forest tree community. K E Y W O R D S carbon-offset projects, forest regeneration, invasive alien species, restoration ecology, tropical forest management Résumé Les plantes envahissantes nuisent aux communautés indigènes en modifiant la fonction des écosystèmes et en perturbant la régénération naturelle. Nous étudions les effets de l'envahissant Lantana camara L. (Verbenaceae) sur la régénération de la forêt dans le parc national de Kibale, en Ouganda. Nous évaluons l'efficacité de la coupe et du déracinement du Lantana pour promouvoir le recrutement d'arbres indigènes. Les parcelles d'échantillonnage étaient de trois types: (i) actuellement envahies par le Lantana; (ii) débarrassées du Lantana et maintenant gérées; et (iii) parcelles de référence This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Section: Discussionmentioning

confidence: 99%

The effects of the invasive species, Lantana camara, on regeneration of an African rainforest

et al. 2023

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“…A crown condition assessment was conducted for each tree sampled. Crown condition assessments are a visual, groundbased scoring system for eucalypt crown dieback (Stone et al 1995) and have been shown to be a robust method for assessing crown health (Horton et al 2011) holding accuracy across seasonal canopy fluctuations (Lambert et al 2017). Trees were given scores out of five for each of crown size and shape, crown foliar density, dead branches, crown epicormic growth and foliar damage to determine crown condition.…”

Section: Canopy Condition Assessmentsmentioning

confidence: 99%

The functional roles of psyllid abundance and assemblage on bird-associated forest defoliation

et al. 2021

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Fluctuations in the abundance of insect herbivores and the severity of damage they cause to their hosts are key factors affecting tree health and trophic interactions. Bell miner associated dieback (BMAD) is a trophic cascade involving eucalypt trees, psyllids and bell miners. Bell miners are a territorial species of bird that reduce insectivorous bird diversity, thereby increasing psyllid abundances. The role of psyllids in BMAD is debated, primarily because psyllid host specificity, genus, defoliation potential and/or lerp composition have been conflated or unexplored. This study documented psyllid communities and canopy structure of four eucalypt hosts (Eucalyptus bridgesiana, E. caliginosa, E. propinqua and E. siderophloia) in BMAD and non-BMAD-affected forests in northern New South Wales. Psyllid abundances were significantly higher in BMAD-affected forests. However, psyllid assemblages did not differ between forest types which contrasts with an influential hypothesis concerning bell miner farming of psyllids that produce sugary lerps (Glycaspis species). Importantly, psyllid communities differed among species of eucalypt host. Hosts supporting higher abundances of Cardiaspina tended to have a stronger negative relationship between canopy health and psyllid abundances than other host trees. Cardiaspina were also found on older leaves and associated with more leaf damage than other psyllids. Unlike most other psyllid genera, Cardiaspina initiate premature foliar senescence leading to defoliation which ultimately changes the age structure of leaves of the canopies of affected trees. Our study supports the functional linkage between psyllid assemblages, their relative abundances and defoliation potential to bottom-up mechanisms behind a bird-associated trophic cascade.

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“…Globally, Lantana removal experiments have been shown to promote native tree diversity and avian diversity (Lambert et al, 2016; Safari & Byarugaba, 2008). However, as Lantana is not the only factor shaping forest communities, successful restoration requires that Lantana removal should be accompanied with other suitable measures and long‐term monitoring of interactions is necessary (Lambert et al, 2017; Yeates & Schooler, 2011). Despite the numerous studies on the impacts of invasive species, only few have studied the impacts on diversity, vegetation structure, and soil properties in forests (Dobhal et al, 2011; Kumar et al, 2020; Sharma & Raghubanshi, 2009, 2010; Sundaram & Hiremath, 2012).…”

Section: Introductionmentioning

confidence: 99%

Invasive shrub Lantana camara L. alters the flora and soils in tropical dry deciduous forests of Central India

et al. 2022

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Does the removal of Lantana camara influence eucalypt canopy health, soil nutrients and site occupancy of a despotic species?

Cited by 9 publications

References 33 publications

The effects of the invasive species, Lantana camara, on regeneration of an African rainforest

The effects of the invasive species, Lantana camara, on regeneration of an African rainforest

The functional roles of psyllid abundance and assemblage on bird-associated forest defoliation

Invasive shrub Lantana camara L. alters the flora and soils in tropical dry deciduous forests of Central India

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