Lantana camara L.: a weed with great light-acclimation capacity

Carrión-Tacuri, Jorge; Rubio-Casal, Alfredo E.; Cires, Alfonso de; Figueroa, M.E.; Castillo, Jesús M.

doi:10.1007/s11099-011-0039-6

Cited by 25 publications

(12 citation statements)

References 56 publications

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“…For instance, for H. psittacorum, for which light availability is the single most important factor limiting flowering (Criley and Broschat 2010), only a very low percentage of flowering (less than 5 %) could be observed at all PAR levels in which the species was grown in AR (7.96 to 18.6 mol m −2 d −1 ). This interpretation is also consistent with the understanding that lower PAR reduces flowering in tropical plants (Carrión-Tacuri et al 2011), and that plants experiencing low PAR are sometimes held indefinitely in a vegetative state (Daubenmire 1974). Alternative shade-tolerant flowering shrubs should be preferentially used in these sites.…”

Section: Discussionsupporting

confidence: 84%

The effects of urban forms on photosynthetically active radiation and urban greenery in a compact city

Tan

Ismail

2015

Urban Ecosyst

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Urban greenery is increasingly recognized as an important component of urban ecosystems as it provides a range of ecosystem services for environmental and human wellbeing. However, the extent to which the performance of urban greenery is affected by availability of light in high-density urban environment is poorly understood. We examined the effect of shade on the levels of photosynthetically active radiation (PAR) in different urban forms, focusing on urban street canyon, vehicular flyovers, sky terraces, at-grade community gardens and rooftop community gardens surrounded by high-rise residential buildings. Within these urban forms, we examined the effects of PAR levels on the growth of shrubs, trees and palms. PAR was assessed though simulation using the building information modeling tool Ecotect, and direct measurements with quantum sensors. PAR was most reduced in sky terraces, with daily PAR restricted to about 15 % of unshaded conditions in Singapore. Daily PAR in rooftop community garden was about 60 % of unshaded conditions, whereas urban street canyon, planting area around and under vehicular flyovers and at-grade community garden had daily PAR of 41 to 52 % of unshaded conditions. Within these shaded environments, almost half of all shrubs and almost all flowering shrubs showed differences in vegetative and reproductive growth at lower PAR levels, respectively. Slenderness of trees was also significantly higher compared to trees grown in more unshaded conditions. The spatial distribution of PAR levels was highly non-uniform, with PAR differing between two and nine-fold within a site, and differed significantly to that of direct sunshine hours. These findings provide insights on how a better understanding of effects of shade on PAR helps to improve urban green space design and plant selection for better plant performance.

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Section: Discussionsupporting

confidence: 84%

The effects of urban forms on photosynthetically active radiation and urban greenery in a compact city

Tan

Ismail

2015

Urban Ecosyst

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“…Drake, which is often accompanied by two aggressive invasive shrub species: Lantana camara L. and Rubus moluccanus L. (Styger et al 2007). Although Lantana has been classified as 'one of the world's ten worst weeds' (Sharma et al 2005) because of its strong allelopathic effect (Sharma et al 1988) and high phenotypic plasticity (Carrion-Tacuri et al 2011), Rubus is considered more aggressive and capable of out-competing and suppressing both Lantana and Psiadia (Styger et al 2007). Invasive woody plants are often (but not always, e.g.…”

Section: Introductionmentioning

confidence: 99%

Transpiration and stomatal conductance in a young secondary tropical montane forest: contrasts between native trees and invasive understorey shrubs

Ghimire¹,

Bruijnzeel

Lubczynski

et al. 2018

Tree Physiology

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It has been suggested that vigorous secondary tropical forests can have very high transpiration rates, but sap flow and stomatal conductance dynamics of trees and shrubs in these forests are understudied. In an effort to address this knowledge gap, sap flow (thermal dissipation method, 12 trees) and stomatal conductance (porometry, six trees) were measured for young (5-7 years) Psiadia altissima (DC.) Drake trees, a widely occurring species dominating young regrowth following abandonment of swidden agriculture in upland eastern Madagascar. In addition, stomatal conductance (gs) was determined for three individuals of two locally common invasive shrubs (Lantana camara L. and Rubus moluccanus L.) during three periods with contrasting soil moisture conditions. Values of gs for the three investigated species were significantly higher and more sensitive to climatic conditions during the wet period compared with the dry period. Further, gs of the understorey shrubs was much more sensitive to soil moisture content than that of the trees. Tree transpiration rates (Ec) were relatively stable during the dry season and were only affected somewhat by soil water content at the end of the dry season, suggesting the trees had continued access to soil water despite drying out of the topsoil. The Ec exhibited a plateau-shaped relation with vapour pressure deficit (VPD), which was attributed to stomatal closure at high VPD. Vapour pressure deficit was the major driver of variation in Ec, during both the wet and the dry season. Overall water use of the trees was modest, possibly reflecting low site fertility after three swidden cultivation cycles. The observed contrast in gs response to soil water and climatic conditions for the trees and shrubs underscores the need to take root distributions into account when modelling transpiration from regenerating tropical forests.

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“…In contrast, shaded-protected environments provided radiation to pass below the saturation point, improving photosynthetic capacity and improving the allocation of biomass in developing organs (CARRIÓN-TACURI et al, 2011). In addition, in shaded environments, less water loss favored the absorption of nutrients and the exploration of the substrate, since the presence of moisture facilitates primary root development (CHAPMAN et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

Absorção De Água Em Argamassa Com Incorporação De Resíduo De Caulim

Nascimento¹,

Dias²,

Damaceno³

et al. 2021

Engenharias Tendências E Inovações (1a Edição)

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The objective of this study is to evaluate the perception of education professionals, before and after the application of theoretical and practical training based on active methodologies, on safety and prevention against fire and evacuation in disaster situations. The research method adopted is an action research, as it involves diagnosis, planning, action and evaluation to identify the perception of fire protection education professionals. The population consists of 29 education professionals and 75 students, aged between 4 and 5 years, from a private school in the city of Itabira-MG. The structured questionnaire technique is used for teachers and employees, applied before the project to measure the interviewees 'prior knowledge and after the project, to evaluate the effectiveness of the applied training, the teachers' perception of their and children's learning and the need for the topic to be an issue that the school community should constantly address as an important issue in the school calendar schedule. The results indicate that it is necessary to adopt safety training in schools and to keep this training constant. It is concluded that if teachers and school staff undergo regular training they will be able to act consciously, with students, in an emergency. That it is important to use scientific methods so that a broad and effective learning occurs and it is necessary to adopt the theme in the syllabus of schools.

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Lantana camara L.: a weed with great light-acclimation capacity

Cited by 25 publications

References 56 publications

The effects of urban forms on photosynthetically active radiation and urban greenery in a compact city

The effects of urban forms on photosynthetically active radiation and urban greenery in a compact city

Transpiration and stomatal conductance in a young secondary tropical montane forest: contrasts between native trees and invasive understorey shrubs

Absorção De Água Em Argamassa Com Incorporação De Resíduo De Caulim

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