Realized pollen and seed dispersal within a continuous population of the dioecious coniferous Brazilian pine [Araucaria angustifolia (Bertol.) Kuntze]

Sant’Anna, Cristina Silva; Sebbenn, Alexandre Magno; Klabunde, Gustavo H F; Bittencourt, Ricardo; Nodari, Rubens Onofre; Mantovani, Adelar; Reis, Maurício Sedrez dos

doi:10.1007/s10592-013-0451-5

Cited by 33 publications

(33 citation statements)

References 41 publications

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“…Importantly, as recorded for the congeneric monkey puzzle tree Araucaria araucana 10 and other plant species 8 9 17 39 40 , parrots can act as primary dispersers by moving most seeds long distances (hundreds of meters), which can have a pervasive influence in the genetic structure of populations. Genetic mapping of all living trees showed the realized dispersal of seeds within a 7.2 ha plot of Parana pine forest, dispersal reaching 318 m with 50% of seeds being dispersed up to 133 m 41 . Given the relatively short movements of mice and medium-sized rodents 42 43 , parrots may play a key role on long-distance seed dispersal, thus facilitating the regeneration and connection of fragmented population nuclei of this endangered species.…”

Section: Discussionmentioning

confidence: 99%

Endangered plant-parrot mutualisms: seed tolerance to predation makes parrots pervasive dispersers of the Parana pine

Tella

Dénes

Zulian

et al. 2016

Sci Rep

108

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Parrots are largely considered plant antagonists as they usually destroy the seeds they feed on. However, there is evidence that parrots may also act as seed dispersers. We evaluated the dual role of parrots as predators and dispersers of the Critically Endangered Parana pine (Araucaria angustifolia). Eight of nine parrot species predated seeds from 48% of 526 Parana pines surveyed. Observations of the commonest parrot indicated that 22.5% of the picked seeds were dispersed by carrying them in their beaks. Another five parrot species dispersed seeds, at an estimated average distance of c. 250 m. Dispersal distances did not differ from those observed in jays, considered the main avian dispersers. Contrary to jays, parrots often dropped partially eaten seeds. Most of these seeds were handled by parrots, and the proportion of partially eaten seeds that germinated was higher than that of undamaged seeds. This may be explained by a predator satiation effect, suggesting that the large seeds of the Parana pine evolved to attract consumers for dispersal. This represents a thus far overlooked key plant-parrot mutualism, in which both components are threatened with extinction. The interaction is becoming locally extinct long before the global extinction of the species involved.

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Section: Discussionmentioning

confidence: 99%

Endangered plant-parrot mutualisms: seed tolerance to predation makes parrots pervasive dispersers of the Parana pine

Tella

Dénes

Zulian

et al. 2016

Sci Rep

108

View full text Add to dashboard Cite

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“…It also favors the natural regeneration, because the low regeneration in natural Araucaria forests is due to the thickening of the cups that do not allow the entry of light near the soil (SANT'ANNA et al, 2013;HESS et al, 2014). Thus, the forest management for the natural areas of Araucaria would bring social, environmental and financial benefits to the local populations.…”

Section: Discussionmentioning

confidence: 99%

DEVELOPMENT OF MODELS TO AID DECISION-MAKING IN THE MANAGEMENT OF Araucaria angustifolia (Bertol.) Kuntze

Souza

Hess²,

Costa³

et al. 2020

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Operational research (OR) is a powerful tool for decision-making in optimizing forestry production planning. Thus, the objective of this study is to use the OR to solve forest regulation problems in a natural forest of Araucaria angustifolia (Bertol) Kuntze. The proposal for better management regime for the forest consisted in the elaboration of two OR problems using integer linear programming (ILP). I – the first aiming to maximize income for each regime; and the II – second aiming to define the best management alternative for three values of the De Liocourt q quotient of 1.1; 1.3 and 1.5, residual basal areas of 10.0, 12.0 and 14.0 m2.ha-1 and cutting cycles of 20, 25 and 30 years, creating thus 27 management scenarios. Despite the application of cutting cycles of 20, 25 and 30 years, the management alternative that best uses the resources and maximizes the income for this area of 84 ha, in the municipality of Lages, SC, is “q” = 1.3 with residual basal area of 12 m2.ha-1 for all cutting cycles. The removal of these trees in the forest will contribute to the maintenance of a future diametric structure, natural regeneration, species conservation and tree increment rate, as well as the maintenance of resources of the forest ecosystem.

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“…Seeds of Asarum species are dispersed by ants (Gorb and Gorb, 1995), and the dispersal ability of Asarum seeds has been estimated as 10-50 cm per year (Maekawa, 1953;Hiura, 1978). These inefficient pollinators and the low seed dispersal ability can result in the formation of reproductively isolated units within a population (Hamrick et al, 1993;Gevaert et al, 2013;Sant'Anna et al, 2013). Substructuring of populations causes a reduction in heterozygosity in a population because of treating multiple subpopulations as a single large population (known as the Wahlund effect; Wahlund, 1928;Dharmarajan et al, 2013).…”

Section: Population Genetic Variation In Asarum Populationsmentioning

confidence: 99%

Relative contributions of neutral and non-neutral processes to clinal variation in calyx lobe length in the series Sakawanum (Asarum: Aristolochiaceae)

et al. 2017

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Divergent selection may have driven the calyx lobe length variation in series Sakawanum taxa, although the underlying mechanism is still not clear. The low genetic differentiation indicates recent divergence and/or gene flows between geographically close taxa. These neutral processes would also affect the clinal variation in calyx lobe lengths. Overall, this study implies the roles of population history and divergent selection in shaping the current cline of a flower trait in the series Sakawanum.

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Realized pollen and seed dispersal within a continuous population of the dioecious coniferous Brazilian pine [Araucaria angustifolia (Bertol.) Kuntze]

Cited by 33 publications

References 41 publications

Endangered plant-parrot mutualisms: seed tolerance to predation makes parrots pervasive dispersers of the Parana pine

Endangered plant-parrot mutualisms: seed tolerance to predation makes parrots pervasive dispersers of the Parana pine

DEVELOPMENT OF MODELS TO AID DECISION-MAKING IN THE MANAGEMENT OF Araucaria angustifolia (Bertol.) Kuntze

Relative contributions of neutral and non-neutral processes to clinal variation in calyx lobe length in the series Sakawanum (Asarum: Aristolochiaceae)

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