Escudo de la República de Colombia


Escalating would save Amazonian palm trees from extinction

“Pecoña”, “estrobos” and “ramp” are the escalating methods which would provide a new breath of air to these Amazonian giants, whose existence is currently threatened due to indiscriminate felling to harvest their fruit.

Bogotá D. C., 19 de julio de 2016Agencia de Noticias UN-

Escalating with a ramp is one form of climbing a palm tree. Photo: Personal file.

The average lifecycle of a palm tree is 100 years.

For centuries the açaí palm has been part of the diet of indigenous communities.

Besides fruit, palms provide other resources to Amazonian communities.

Moriche fruit has antioxidant properties, among others.

The “pecoña” escalating method consists of tying ropes on wrists and ankles.

Universidad Nacional de Colombia (UNal) Biologist Carolina Isaza Aranguren lived for 2 years with Amazonian communities of Leticia and San Martín de Amacayacu in Colombia and Iquitos in Peru. There she analyzed the cropping methods and the threat of felling these species of palm trees: [Euterpe precatoria (açaí), Mauritia flexuosa (moriche) and Oenocarpus bataua (patawa)]. 

In Amacayacu, near Leticia, she interviewed 12 harvesters of the Ticuna Indians and inquired about the productive cycle, distribution areas, resource abundance perception, cultural expression linked to its use and marketing aspects. Furthermore she observed the community during these tasks and registered how the process is performed. 

With this information she determined that chosen adult palm trees are chopped down with hatchets or machetes and according to the Indians this is a safe, fast and easy manner. 

She also observed that harvesting takes around 60 minutes, including felling, harvesting and packing the fruit. This task is performed by approximately 3 and 5 people of the same family, especially women. 

At Amacayacu they harvest between 1,672 and 2,500 açaí palm trees a year with a total amount of fruits between 19.4 and 29 tons, while they cut down between 35 and 70 female palms trees for 2.5 to 5 tons of fruit. 

Furthermore fruit demand of the studied species in the local Leticia market is strongly increasing. To meet the demand they harvest between 201 and 435 tons/yr. of moriche, which means felling between 464 to 1,015 palm trees. Additionally the demand for açaí fruit is between 12.4 and 24.8 tons/yr. 

“Palm trees are dioecious (there are distinct male and female individuals). Masculine individuals produce pollen which is usually transported by insects, in the air or other pollinating species to the female palm trees which produce the seed,” she said. 

Therefore one of the relevant results is that females trees are most affected. Despite the natural proportion between males and females is one to one, in Amacayacu the relation is three male palm trees for every female. This produces genetic impoverishment and male trees cannot reproduce, finally producing extinction of the species. 

Tree climbing, the solution 

One alternative to change this consists of using other harvesting methods based on escalating. There are several escalating methods, one is called “pecoña” and consists of tying ropes on wrists and ankles to climb up and down trees. Other two methods are called “estrobos” and “ramp” and consist of using planks as ramps to do the same task. 

After performing a series of workshops and receiving escalating equipment donations from different international institutions they started escalating palm trees; and although they felt at risk they understood that only with this method they can have an inexhaustible source of resources. 

Although the projections are still short term, they did achieve a change with respect to the harvesting figures versus the impact caused by palm felling. For instance with the same amount of harvest and not chopping trees, production stayed the same. 

Furthermore the Palms project team wrote a booklet and distributed it among the harvesters of the area so their harvesting techniques could turn into a sustainable alternative. 

Food safety threatened 

One of the stages of the project consisted in establishing a comprehensive projection model to assess how harvesting could impact the population of palm trees in the coming years. This is a suitable tool to study the population dynamics and appropriate when the lifecycle of individuals is commanded by two or more variables. 

“Analyzing the obtained information they can develop strategies to improve productivity and maximize processes and the steps which have the greatest bearing on population growth and reproduction. Also it is possible to implement management plans so the activity can be sustainable and help environmental authorities take decisions,” she said. 

Isaza discovered that the species of the area have an “inverted J” pattern with high seedling production and a strong fall as size increases. This is typical population behavior of species in good regeneration stage and long lifecycles. However adult palm trees harvested with destructive methods are notoriously disappearing in areas where they were abundant. 

For instance, if the felling rate of açaí palms continues at a rate of 100 trees per hectare, there will only be 25 individuals in 20 years. 

Isaza’s research project directed by Natural Sciences Institute Professors Rodrigo Bernal and Gloria Galeano is part of the project entitled, “Impact of harvesting tropical forest palm trees” with participation of four South American countries (Bolivia, Ecuador, Colombia and Peru) and five European countries (Denmark, Germany, UK, France and Spain). 

Read the article in its entirety in Spanish at UN Periódico

N.° 125

Otras noticias

Verificación de título con tecnología <em>blockchain</em>

Ciencia & Tecnología

febrero 25 de 2020

UNAL invita a sus egresados a descargar títulos electrónicos

Después de casi un año de haberse implementado la modalidad virtual de los...

Variedades de cilantro en la UNAL Sede Palmira. Fotos: archivo Unimedios.

Desarrollo Rural

febrero 25 de 2020

UNAL obtiene primer certificado de obtentor en variedad de cilantro

Después de cinco años de trabajo, la Universidad Nacional de Colombia (UNAL)...

Menos tiempo de transferencia significaría un mejor servicio para los usuarios. Fotos: archivo Unimedios.

Ciencia & Tecnología

febrero 25 de 2020

Modelo matemático ayudaría a ahorrar tiempo en TransMilenio

La fórmula mide el tiempo de transferencia/transbordo de los pasajeros en un...

Se cree que la rana <em>Scinax ruber</em> puede reunir una diversidad de especies que ha sido subestimada. Fotos: Nicolás Castillo.

Ciencia & Tecnología

febrero 25 de 2020

Biodiversidad de ranas Scinax ruber, un estudio premiado por la FAAE

Los diferentes linajes de esta especie –conocida comúnmente como ranita...

Los nuevos miembros de la familia UNAL disfrutaron de las actividades de bienvenida.


febrero 24 de 2020

FOTOGALERÍA: Arte y cultura en la bienvenida a nuevos estudiantes de la UNAL

Teatro y música se tomaron la Plaza Central de la Universidad Nacional de...

UBA es una crema exfoliante natural cuya materia prima son las frutas magulladas. Fotos: Brandon Pinto – Unimedios.

Ciencia & Tecnología

febrero 24 de 2020

Exfoliante natural a partir de frutas magulladas

Las frutas que se desperdician en plazas de mercado son el principal...

En Cúcuta, la migración venezolana constituye un reto en empleo y servicios sociales.

Ciudad & Territorio

febrero 24 de 2020

Ciudades intermedias comparten retos de gobierno

Seguridad, empleo y movilidad son las problemáticas que más afectan a nuestras...

Las ratas y los ratones son un modelo ampliamente usado en la investigación de enfermedades humanas. Fotos: Brandon Pinto – Unimedios.

Ciencia & Tecnología

febrero 24 de 2020

Embriones de ratones serán congelados para estudios científicos

Estudiantes y profesores de la Clínica de Reproducción Animal de la Facultad de...

La rectora Dolly Montoya Castaño les dio la bienvenida a los nuevos estudiantes de la UNAL.


febrero 22 de 2020

Rectora da bienvenida a nuevos estudiantes de la familia UNAL

Este sábado se dieron cita en la Plaza Central 3.602 nuevos estudiantes –y sus...


febrero 21 de 2020

Comunicado 04 de 2020 de Rectoría

a la Opinión Pública