Allometry and stilt root structure of the neotropical palm <i>Euterpe precatoria</i> (Arecaceae) across sites and successional stages

Ávalos, Gerardo; Otárola, Mauricio Fernández

doi:10.3732/ajb.0900149

Cited by 21 publications

(13 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our data on the allometry in S. glaucescens corroborates the study by Schatz et al (1985) for tropical palms, indicating that a direct relationship between stem height and diameter may not always exist; i.e., it can change in shape during stem growth (Alves et al 2004). This fact was observed in palm Euterpe precatoria that showed geometric similarity in individuals under one meter, whereas palms above this value did not adjust to any mechanical model (Avalos & Otárola 2010).…”

Section: Allometric Relations and Models Of Mechanic Stability In Syasupporting

confidence: 87%

Growing straight versus growing decumbent: soil quality and allometry in Syagrus glaucescens Becc. (Arecaceae), an endemic and threatened palm of the Espinhaço Mountains, Brazil

Miola

Fernandes

2015

Acta Bot. Bras.

View full text Add to dashboard Cite

Syagrus glaucescens is an endemic palm found in the rupestrian grasslands of the Espinhaço Mountains in southeastern Brazil. It is highly associated with quartzitic soils and exhibits strong intra-specific morphological variation in the different areas where it occurs. Allometric traits were used to verify whether there are any significant differences in the morphological traits between populations of this species located in two distinct areas. In the region of the Serra do Cipó individuals exhibit decumbent stems whereas on the Diamantina Plateau stems are straight and perpendicular to the ground. Soil quality was related to plant morphological traits to test the hypothesis that allometric variation is influenced by soil nutritional differences. Stem shape and size differed significantly among individuals inhabiting the two different regions: individuals in Serra do Cipó were shorter and had fewer leaves compared to individuals found in the Diamantina Plateau. Water retention capacity and nutrient absorption of the soils of the two sites were markedly different. In Serra do Cipó the soils were more acid, with higher aluminum saturation and lower sand content compared to the soils in Diamantina. These traits correlated with stem shape and indicate that soil acidity and aluminum saturation influence the architecture of S. glaucescens.

show abstract

Section: Allometric Relations and Models Of Mechanic Stability In Syasupporting

confidence: 87%

Growing straight versus growing decumbent: soil quality and allometry in Syagrus glaucescens Becc. (Arecaceae), an endemic and threatened palm of the Espinhaço Mountains, Brazil

Miola

Fernandes

2015

Acta Bot. Bras.

View full text Add to dashboard Cite

show abstract

“…In total, 56 E. precatoria individuals were counted on these quadrates. D ranged from 5.5-14.0 cm, and H ranged from 7.3-21.3 m. The stem of E. precatoria reaches reportedly to 23 cm in D and 25 m in H [22].…”

Section: Data Collectionmentioning

confidence: 99%

“…precatoria (Arecaceae) is a solitary palm and has been reported as the most abundant tree species in the Amazon by a recent study which investigated the individual density and species abundance on the basis of 1170 monitoring plots established in the Amazon [15]. Euterpe precatoria develops 10-20 compound leaves with 43-91 evenly distribute leaflets [21] and is characterized by stilt root formation [22,23]. The mesocarp of the palm seeds and the palm hearts are widely consumed [21].…”

Section: Euterpe Precatoriamentioning

confidence: 99%

Allometric Equations for Estimating Biomass of Euterpe precatoria, the Most Abundant Palm Species in the Amazon

Silva

Suwa

Kajimoto

et al. 2015

Forests

View full text Add to dashboard Cite

Allometric models to estimate biomass components such as stem mass Ms, foliage mass Ml, root mass Mr and aboveground mass Ma, were developed for the palm species Euterpe precatoria Mart., which is the most abundant tree species in the Amazon. We harvested twenty palms including above-and below-ground parts in an old growth Amazonian forest in Brazil. The diameter at breast height D ranged from 3.9-12.7 cm, and the stem height H ranged from 2.3-16.4 m. The D, diameter at ground basis D0, crown diameter CD, H, stem specific gravity ρ, and number of fronds Nf were considered as independent variables and incorporated into a power function model. 451 stem tissue. The average root/shoot ratio was estimated as 0.29 which was higher than that reported for the non-palm tree species in the Amazon. Comparisons of several models to estimate Ma of different palm species, suggested that the variations of the D-H relationship and ρ should be considered to develop allometric models for estimating biomass in palm species. In particular the ρ largely varied depending on individual size, which should be important to consider, when developing the allometric models for palms.

show abstract

“…3) has been reported for other palms [8,28,37], and it could reflect high construction costs for reproductive structures [39] and structural support constraints at the palm base [40]. The latter explanation could be of particular importance at La Planada, as plants are always covered by numerous bromeliads and other epiphytes filled with water, which impose additional pressures to structural stability.…”

Section: Discussionmentioning

confidence: 81%

“…Further analysis of allometric relationships in P. acuminata [e.g. 40], and of growth rate variations among genets of different sizes may help to elucidate these hypotheses. Table 3.…”

Section: Discussionmentioning

confidence: 99%

Demography of the Clonal Palm Prestoea Acuminata in the Colombian Andes: Sustainable Household Extraction of Palm Hearts

Gamba-Trimiño

Bernal

Bittner³

2011

Tropical Conservation Science

View full text Add to dashboard Cite

Prestoea acuminata is a highland clonal palm traditionally used as a source of palm hearts by the Awá Indians of Colombia and Ecuador; its commercial use thrived in the 1980´s. Extraction pressure on the resource is particularly strong during Holy Week, as campesinos use it as a substitute for meat. We studied P. acuminata demography at La Planada Reserve, southwestern Colombia, and elaborated a ramet-based matrix model to assess the impact of different palm heart harvest regimes. The 1.5 ha study area had 1182 genets, composed of 5389 ramets. Harvestable stems were 23-40 years old and accounted for 0.32% of the stable stage distribution (SSD). Ramet population asymptotic growth rate  was 1.0485, and was more sensitive to changes in the survival of stemless ramets. Observed stage distribution (OSD) differed from predicted SSD, which suggests the population was exhibiting transient dynamics. As our census was conducted four years after a severe ENSO, we argue that the OSD could be reflecting this environmental disturbance. Thus, harvest simulations must be interpreted with caution. Although P. acuminata ramets are abundant at La Planada, the typical genet architecture, with many stemless ramets (20) and only 1-2 stems appropriate for palm heart extraction, accounts for a very low resource yield (127 palm hearts ha -1 in our survey). This, and its slow growth rate, make P. acuminata suitable only for household extraction. As harvest has a strong effect on sexual recruitment, we recommend a maximum annual extraction of 10% of harvestable ramets. Key words: Arecaceae, La Planada, Matrix ProjectionResumen Prestoea acuminata es una palma clonal de tierras altas utilizada tradicionalmente como fuente de palmito por los indígenas Awá de Colombia y Ecuador, que fue explotada comercialmente en los años 1980's. La presión de extracción sobre el recurso es particularmente fuerte durante la Semana Santa, pues los campesinos lo consumen en reemplazo de la carne. Para evaluar el impacto de diferentes regímenes de cosecha, estudiamos la demografía de P. acuminata en la Reserva La Planada, suroccidente de Colombia, y elaboramos un modelo matricial para los rametes. Las 1.5 ha estudiadas tenían 1182 genetes compuestos de 5389 rametes. Los tallos cosechables tenían 23-40 años y representaron el 0.32% de la distribución estable de estados (SSD). La tasa de crecimiento asintótico para los rametes fue de =1.0485, siendo más afectada por cambios en la supervivencia de los rametes sin tallo. La distribución observada de estados (OSD) y la SSD estimada fueron significativamente diferentes, lo que sugiere que la población estaba atravesando por dinámicas transitorias. Dado que nuestro censo se llevó a cabo cuatro años depués de un severo El Niño, argumentamos que la distribución observada podría estar reflejando esta perturbación ambiental. Por lo tanto, las simulaciones de cosecha deben ser interpretadas con precaución. Aunque los rametes de P. acuminata son abundantes en La Planada, la arquitectura típica de un genete, con m...

show abstract

Allometry and stilt root structure of the neotropical palm Euterpe precatoria (Arecaceae) across sites and successional stages

Cited by 21 publications

References 46 publications

Growing straight versus growing decumbent: soil quality and allometry in Syagrus glaucescens Becc. (Arecaceae), an endemic and threatened palm of the Espinhaço Mountains, Brazil

Growing straight versus growing decumbent: soil quality and allometry in Syagrus glaucescens Becc. (Arecaceae), an endemic and threatened palm of the Espinhaço Mountains, Brazil

Allometric Equations for Estimating Biomass of Euterpe precatoria, the Most Abundant Palm Species in the Amazon

Demography of the Clonal Palm Prestoea Acuminata in the Colombian Andes: Sustainable Household Extraction of Palm Hearts

Contact Info

Product

Resources

About