Do the structures of macaw palm fruit protect seeds in a fire-prone environment?

Bicalho, Elisa Monteze; Rosa, Bruno Luan; Souza, Anna Elisa de; Rios, Camilla Oliveira; Pereira, Eduardo Gusmão

doi:10.1590/0102-33062016abb0077

Cited by 9 publications

(6 citation statements)

References 41 publications

(52 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another important relevance to dispersal structure in B. tomentosa is the protection against fire passage, which prevents the embryo damage, as in macaw palm (Bicalho et al, 2016). These facts have ecological significance for maintenance of this species at Cerrado.…”

Section: Modelmentioning

confidence: 99%

“…Another factor related to germination are adaptive seed dispersal structures, important for the survival of some species in the habitat, such the protection of embryo against the fire passage, as in macaw palm (Bicalho et al, 2016). The endocarp still helps to maintain the moisture content for complete seed germination and establishment (Mattana et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Germination and seed ecology of Buchenavia tomentosa Eichler (Combretaceae)

Corrêa

Silva

et al. 2020

J. Seed Sci.

View full text Add to dashboard Cite

Buchenavia tomentosa produces fruits with ecological function for Cerrado’s fauna. The aims of this paper were to quantify seed germination and behavior on thermal conditions and explain about water absorption of dispersal structure in B. tomentosa seeds. Ripe fruits were pulped, the endocarp removed, and seeds used in the germination tests at temperatures of 10 to 45 °C. Seeds were placed in rolls of filter paper and then placed in germination chambers, at twelve hours of photoperiod. Germination models at sub and supra optimal temperatures were made from the germination rate (Tg), from the time to germination of 50% of the seeds (t50). Germination speed index (GSI), measurements of shoot and root lengths and dry mass at each temperature were obtained. The water imbibition curve of seed with or without endocarp adhered and scarified or not was made and other samples were tested for emergence in sand. Cardinal temperatures were: base temperature (Tb) of 9.23 °C; maximum temperature (Tmax) of 44.6 °C; optimum temperature (To) of 29.24 °C and thermal time of 89.71 °C.days. Seedlings showed higher GSI, root and aerial part length and higher root dry mass at the optimal temperature. The endocarp retards, but does not prevent water absorption and emergence.

show abstract

Section: Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Germination and seed ecology of Buchenavia tomentosa Eichler (Combretaceae)

Corrêa

Silva

et al. 2020

J. Seed Sci.

View full text Add to dashboard Cite

show abstract

“…Both species make up the hyacinth macaw's diet in the Pantanal (Guedes & Harper 1995). These tree species are characterized as pioneer trees from secondary succession, and benefit (Bicalho et al 2016), which stimulate their growth and fruit production. The fruits of acuri and bocaiuva palm trees are consumed and digested by cattle, facilitating hyacinth macaw feeding (Pott & Pott 1994, Guedes & Harper 1995, Bicalho et al 2016).…”

Section: Hyacinth Macaw Population At the São Francisco Do Perigara Rmentioning

confidence: 99%

Long-term monitoring of a hyacinth macaw Anodorhynchus hyacinthinus (Psittacidae) roost in the Pantanal, Brazil

Scherer-Neto¹,

Guedes²,

Toledo³

2019

Endang. Species. Res.

View full text Add to dashboard Cite

The hyacinth macaw Anodorhynchus hyacinthinus is the world's largest parrot species and is currently listed as Vulnerable by the IUCN. This species commonly flocks in collective roost sites. We monitored a group of hyacinth macaws that has used a single roost site on a ranch with traditional, extensive cattle management in the Pantanal, Brazil, for over 50 yr. We analyzed 15 yr of monitoring data on the use of this roost site. We used simultaneous counts (n = 37), where individuals flying to the roost site were counted, and also counted pairs in nests. The results indicate that in 2001 there were 234 (mean no. of ind.; 95% CI = 55) macaws in the roost; 15 yr later 708 (95% CI = 142) were registered. The highest number of macaws registered was in the years of 2013 and 2015, when >1000 ind. were observed at the ranch. The model showed an increase rate of 26 ind. yr −1 over the 15 yr monitoring period. Temporal and seasonal fluctuations were observed, with the highest number of macaws recorded during rainy and non-breeding seasons. We discuss these results with an emphasis on the type of ranch management that favors the maintenance of hyacinth macaw food resources. The type of traditional cattle management used at the study site benefits both cattle production and macaw conservation due to positive interactions between cattle feeding habits and landscape-level management practices that preserve macaw habitat.

show abstract

“…Nonetheless, seeds may survive exposure to high temperatures depending on the protective capacity of the fruits or of the seeds themselves. For example, thickness, size and relative water content of the fruit integument (Bicalho et al 2016), as well as the height of the fruits in the tree crown (Sato et al 2018) can provide protection and improve seed survival. Regarding seed protective capacity, tolerance to high temperatures is associated with size (Ribeiro et al 2015;Daibes et al 2019), relative water content (Tangney et al 2019), type of dormancy (Ribeiro et al 2013) and time exposed to high temperatures (Dayamba et al 2010;Ribeiro & Borghetti 2014).…”

Section: Introductionmentioning

confidence: 99%

Constraints on tree seedling establishment after fires: passing the germination bottlenecks

et al. 2021

View full text Add to dashboard Cite

Persistence and colonization by tree species in an environment following a fire depends on the effects on seed germination and seedling development. We used seeds of Kielmeyera coriacea and Qualea parviflora as a model to test the effects of high temperatures on germination and initial development of tree seedlings.• We exposed the seeds to heat flow (70, 100, 130, 150 or 170 °C) for 2 or 5 min and compared the germination with that of unheated seeds (control). Seedlings were then harvested after 3, 7 or 15 days to evaluate aerial and root mass, root:shoot ratio, presence of cotyledon opening, true leaves, and secondary roots.• We found no effect on germination for seeds exposed to temperatures ≥150 °C. However, germination was significantly reduced for seeds exposed to 100 °C for both 2 and 5 min. The mass of 15-day-old K. coriacea seedlings was smaller when seeds were heated at 70 °C for 5 min or at temperatures higher or equal to 100 °C. Qualea parviflora seedlings did not show any difference in mass, but there were marginal differences in the presence of roots and the opening of cotyledons. Kielmeyera coriacea seedlings allocated biomass faster than Q. parviflora.• High temperatures affect both quantity and quality of germinable seeds, as well as biomass allocation during initial seedling development. These factors may explain the decrease in seedlings observed after fire, suggesting a bottleneck effect that influences population dynamics and species persistence in systems with frequent fires.

show abstract

Do the structures of macaw palm fruit protect seeds in a fire-prone environment?

Cited by 9 publications

References 41 publications

Germination and seed ecology of Buchenavia tomentosa Eichler (Combretaceae)

Germination and seed ecology of Buchenavia tomentosa Eichler (Combretaceae)

Long-term monitoring of a hyacinth macaw Anodorhynchus hyacinthinus (Psittacidae) roost in the Pantanal, Brazil

Constraints on tree seedling establishment after fires: passing the germination bottlenecks

Contact Info

Product

Resources

About