Demography of Attalea nucifera: sustainable management and conservation of a threatened species of Colombia
Attalea nucifera is an acaulescent palm native of Colombia that is in risk of extinction. Between 2016-2017 we evaluated the structure and density of populations in six localities of the Magdalena river val-ley, and studied the population dynamic in the locality of Guaduas, Cundinamarca (VC). Althou...
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Universidad Nacional de Colombia
2020-03-01
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| Series: | Caldasia |
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| Online Access: | https://revistas.unal.edu.co/index.php/cal/article/view/76390/74210 |
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| author | Jorge Prada-Ríos Néstor García |
| author_facet | Jorge Prada-Ríos Néstor García |
| author_sort | Jorge Prada-Ríos |
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| description | Attalea nucifera is an acaulescent palm native of Colombia that is in risk of extinction. Between 2016-2017 we evaluated the structure and density of populations in six localities of the Magdalena river val-ley, and studied the population dynamic in the locality of Guaduas, Cundinamarca (VC). Although the population structure differs among locations (X2 = 1819; gl = 25; P < 0.05), populations tend to group according to the degree of habitat perturbation. In four localities an inverted J population structure was observed. A matrix population model showed a finite growth rate (λ) of 0.979 (CI95 % = 0.962–0.997). The demographic processes of the permanence of seedlings, sub-adults and young adults show more elasticity. A transient dynamic simulation projected to 30 years shows that under the scenarios of paddock and cattle lopping the population size decrease drastically. The extinction threshold calcu-lated for the population in the locality VC is of 145 years, but paddock and cattle lopping activities can reduce it to less than 40 years. Although Attalea nucifera persists in very disturbing locations in the Middle Magdalena Basin, the results of population dynamics in the locality VC suggest that it could be less tolerant of environmental disturbances. Thus, it is necessary to increase our knowledge of its population dynamics, as well as seed germination and seedling establishment in different disturbance conditions. |
| format | Article |
| id | doaj-art-058f6f0150d348d1933b00a7e5612c26 |
| institution | OA Journals |
| issn | 0366-5232 2357-3759 |
| language | English |
| publishDate | 2020-03-01 |
| publisher | Universidad Nacional de Colombia |
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| series | Caldasia |
| spelling | doaj-art-058f6f0150d348d1933b00a7e5612c262025-08-20T02:08:12ZengUniversidad Nacional de ColombiaCaldasia0366-52322357-37592020-03-0142313325https://dx.doi.org/10.15446/caldasia.v42n2.76390Demography of Attalea nucifera: sustainable management and conservation of a threatened species of ColombiaJorge Prada-Ríos 0https://orcid.org/0000-0001-9341-893XNéstor García1https://orcid.org/0000-0001-9384-0495Pontificia Universidad JaverianaPontificia Universidad JaverianaAttalea nucifera is an acaulescent palm native of Colombia that is in risk of extinction. Between 2016-2017 we evaluated the structure and density of populations in six localities of the Magdalena river val-ley, and studied the population dynamic in the locality of Guaduas, Cundinamarca (VC). Although the population structure differs among locations (X2 = 1819; gl = 25; P < 0.05), populations tend to group according to the degree of habitat perturbation. In four localities an inverted J population structure was observed. A matrix population model showed a finite growth rate (λ) of 0.979 (CI95 % = 0.962–0.997). The demographic processes of the permanence of seedlings, sub-adults and young adults show more elasticity. A transient dynamic simulation projected to 30 years shows that under the scenarios of paddock and cattle lopping the population size decrease drastically. The extinction threshold calcu-lated for the population in the locality VC is of 145 years, but paddock and cattle lopping activities can reduce it to less than 40 years. Although Attalea nucifera persists in very disturbing locations in the Middle Magdalena Basin, the results of population dynamics in the locality VC suggest that it could be less tolerant of environmental disturbances. Thus, it is necessary to increase our knowledge of its population dynamics, as well as seed germination and seedling establishment in different disturbance conditions.https://revistas.unal.edu.co/index.php/cal/article/view/76390/74210arecaceaebiodiversity conservationextinction timematrix modelpopulation ecology |
| spellingShingle | Jorge Prada-Ríos Néstor García Demography of Attalea nucifera: sustainable management and conservation of a threatened species of Colombia Caldasia arecaceae biodiversity conservation extinction time matrix model population ecology |
| title | Demography of Attalea nucifera: sustainable management and conservation of a threatened species of Colombia |
| title_full | Demography of Attalea nucifera: sustainable management and conservation of a threatened species of Colombia |
| title_fullStr | Demography of Attalea nucifera: sustainable management and conservation of a threatened species of Colombia |
| title_full_unstemmed | Demography of Attalea nucifera: sustainable management and conservation of a threatened species of Colombia |
| title_short | Demography of Attalea nucifera: sustainable management and conservation of a threatened species of Colombia |
| title_sort | demography of attalea nucifera sustainable management and conservation of a threatened species of colombia |
| topic | arecaceae biodiversity conservation extinction time matrix model population ecology |
| url | https://revistas.unal.edu.co/index.php/cal/article/view/76390/74210 |
| work_keys_str_mv | AT jorgepradarios demographyofattaleanuciferasustainablemanagementandconservationofathreatenedspeciesofcolombia AT nestorgarcia demographyofattaleanuciferasustainablemanagementandconservationofathreatenedspeciesofcolombia |