Morphological characteristics and germination of native species seeds for mineland rehabilitation in the Eastern Amazon

Maciel, Gutierre Pereira; Caldeira, Cecílio Fróis; Gastauer, Markus; Ribeiro, Paula Godinho; Silva, Giselly Mota da; Ramos, Sílvio Júnio

doi:10.1007/s11056-022-09938-6

Cited by 4 publications

(1 citation statement)

References 33 publications

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“…Traditional rehabilitation management involves the planting or seeding of species (e.g. Ramos et al 2019; Caldeira et al 2021; Maciel et al 2023; Boanares et al 2023; Massante et al 2023) and relies on fertilization to maximize vegetation growth. This procedure frequently confronts challenges from invasive species infiltrating early in the rehabilitation process (Weidlich et al 2020 b ; Torres et al 2021), and control measures for invasive species, such as chemical and manual weeding, often demonstrate limited long‐term success due to reinvasion (Pearson et al 2016; Weidlich et al 2020 a ).…”

Section: Introductionmentioning

confidence: 99%

Fertilization during mineland rehabilitation may shift competitive outcomes toward invasive species

de Castro,

Boanares,

de Medeiros Sarmento

et al. 2024

Restoration Ecology

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Managing invasive species is essential for achieving mineland rehabilitation goals and ensuring the long‐term provision of critical ecosystem services while preventing new dispersion sources to neighboring areas. Traditional techniques include chemical and manual weeding, but frequent reinvasion limits their long‐term success. Therefore, additional integrated tools, such as stimulating natural competitors, may become necessary, especially where sensitive ecosystems, e.g. the ferruginous savanna ecosystem (cangas) from the Carajás National Forest, Eastern Amazon, Brazil, are found nearby rehabilitation sites. Here, we investigate the influence of different substrates and fertilization levels on the biotic interactions between two native canga grasses (Axonopus longispicus and Paspalum cinerascens) and the invasive molasses grass (Melinis minutiflora), which is frequently found in anthropized and natural ecosystems in Latin America. Nutrient application significantly influenced the growth, resource use strategies, and competitive outcomes of M. minutiflora. Nutrient application has positive effects on the growth of native species when cultivated in isolation but reduces plant development when subjected to competition with molasses grass, potentiating the invader. Although neither of the tested native species exhibited competitive advantages over M. minutiflora, increased nitrogen availability favored the competitive ability of this invasive grass. Thus, eliminating fertilization during mineland rehabilitation may be important for reducing the cover of M. minutiflora in the Carajás region, as sensitive canga ecosystems lack natural barriers against invasion. This strategic approach mitigates the operational risks and costs associated with combating invasive species from rehabilitating minelands, reducing propagule pressure on neighboring canga areas.

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Section: Introductionmentioning

confidence: 99%

Fertilization during mineland rehabilitation may shift competitive outcomes toward invasive species

de Castro,

Boanares,

de Medeiros Sarmento

et al. 2024

Restoration Ecology

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Photochemical attributes determine the responses of plant species from different functional groups of ferruginous outcrops when grown in iron mining substrates

Rios,

Pimentel,

Bicalho

et al. 2024

Funct. Plant Biol.

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Environments originating from banded iron formations, such as the canga, are important reference ecosystems for the recovery of degraded areas by mining. The objective of this work was to evaluate if the relationship between morphofunctional and photosynthetic attributes of native canga species from different functional group results in distinct responses when grown in iron mining tailings substrate. The experiment was carried out with species belonging to different functional groups: a widespread semi-deciduous tree-shrub, Myrcia splendens; an endemic deciduous shrub, Jacaranda caroba; and a nitrogen-fixing herbaceous species, Periandra mediterranea. The species were grown in two conditions, reference soil and iron ore tailing. Despite belonging to different functional groups when grown in tailings, the morphofunctional attributes presented similar responses between species. M. splendens was the species most affected by the conditions imposed by the iron ore mining tailings, with decreased light-use efficiency and electron transport. P. mediterranea had satisfactory growth and maintenance of photosynthetic attributes. J. caroba growing in the tailings increased the effective quantum yield of PSII. The photochemical and growth assessments were able to better explain the adaptive strategies developed by the species, guaranteeing a greater chance of success during the rehabilitation of mining substrates.

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Understanding the role of storage reserve mobilization during seed germination and initial seedling growth in species of the genus Carapa

de Carvalho,

Nascimento,

Fernandes

et al. 2024

Botany

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A physiological and metabolic database for various species of Amazonian plants is crucial to the species selection and sustainable utilization of their diversity. We hypothesized that understanding the mobilization of Carapa seed reserves and water uptake during germination could provide insights into the physiological behavior and propagation to differentiate species of the same genus. Given this, the mobilization mechanisms of primary reserves, water uptake, and enzymatic activities in seeds of two species of Carapa (C. guianensis and C. vasquezii) were investigated. The lipid content was high in both species, with a value of 63.7±4.7% for C. guianensis and 55±1.5% for C. vasquezii. C. guianensis showed higher values for the other evaluated reserves. The protein profile highlights a band between 15 and 25 kDa in C. guianensis. As for the enzymatic activities investigated (lipase, amylase, protease, acid phosphatase), C. guianensis showed greater activity for most of them, except for acid phosphatase. Overall, the species showed different metabolic strategies and dynamics regarding the water uptake and use of reserves. Our findings indicate that distinct metabolic pathways are employed during the germination and initial seedling growth stages of two Carapa species. This trait can potentially guide the use and preservation of these species.

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Morphological characteristics and germination of native species seeds for mineland rehabilitation in the Eastern Amazon

Cited by 4 publications

References 33 publications

Fertilization during mineland rehabilitation may shift competitive outcomes toward invasive species

Fertilization during mineland rehabilitation may shift competitive outcomes toward invasive species

Photochemical attributes determine the responses of plant species from different functional groups of ferruginous outcrops when grown in iron mining substrates

Understanding the role of storage reserve mobilization during seed germination and initial seedling growth in species of the genus Carapa

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