Evolución del riesgo de extinción y estado actual de conservación de las aves de Colombia

Renjifo, Luis Miguel; Amaya-Villarreal, Ángela María

doi:10.18257/raccefyn.461

Cited by 23 publications

(35 citation statements)

References 28 publications

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“…Most of the species that were uplisted had restricted distributions, particularly in south-west Colombia, including both Pacific and Andes (Nariño department mainly, but also Cauca and Valle del Cauca). It is notable that the 13 uplisted species include three cracids, reflecting the disproportionate susceptibility of this group to hunting and habitat loss [43]. Integrating these genuine Red List category changes, the Red List Index showed a rather stable trend in the aggregate survival probability (the inverse of extinction risk) of Colombian birds, declining from 0.955 in 2002 to 0.954 in 2016.…”

Section: Cracidae Yellow-knobbed Curassowmentioning

confidence: 99%

“…As it is the case globally, loss or degradation of habitat is the main threat to Colombian birds according to our results. Illegal economic activities are the main drivers of habitat loss and degradation within the country [43,80], exceeding the impact of legal agriculture, timber extraction and mining, at least for threatened species. Illicit coca crops are the single most important driver of habitat loss, affecting eight of 13 uplisted species (Table 2).…”

Section: Threats To Birds In Colombiamentioning

confidence: 99%

“…For these reasons, bird conservation in Colombia is of global significance. While national red list assessments indicate that the proportion of threatened bird species has increased from 6.4% in 2002 to 8.1% in 2016 [40,41,42,43], this variation is partly a result of changes in knowledge and taxonomy. We calculated the first Red List Index for birds in Colombia to determine the genuine change in national extinction risk of birds in Colombia over this period, compare it with global trends, and explore patterns across ecosystems, regions and groups of species of conservation concern.…”

Section: Introductionmentioning

confidence: 99%

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Tracking extinction risk trends and patterns in a mega-diverse country: A Red List Index for birds in Colombia

2020

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Monitoring trends in the extinction risk of species is important for tracking conservation effectiveness. The Red List index (RLI) reflects changes in aggregate extinction risk for sets of species over time (a value of zero means that all species are extinct, a value of one means that all species are categorized as Least Concern). We calculated the first national RLI for birds in Colombia for the period 2002-2016, and disaggregated indices by ecosystems, regions, and species groups. Overall, the status of birds in Colombia has moderately deteriorated during 2002-2016, declining by 0.0000714% per year (the global RLI for birds declined by 0.0297% per year). High Andean forest, paramo, and freshwater are the ecosystems in worst condition. The two regions with the greatest avian diversity contrasted: the Andes has the lowest RLI, and the Amazon the highest. Among species groups, gamebirds, parrots, large frugivores, and forest raptors are the most threatened. Habitat loss from expansion of illicit crops and population declines from hunting were the most important threats. Agricultural expansion, invasive alien animal species, illegal logging and illegal mining are significant threats for some species. Tracking species' extinction risk is important in a country with the highest bird species richness in the world, dynamic spatial patterns of habitat loss, and high levels of endemism. Recent developments provide reasons for both hope and despair. In 2016, a peace agreement ended 50 years of armed conflict. New opportunities for biodiversity conservation, local development based on bird-watching tourism, and advancement in scientific knowledge of birds now occur alongside dramatic increases in deforestation. These new conservation opportunities and challenges provide strong motivation to take advantage of the fact that the overall risk of extinction of birds in Colombia is still relatively low and stable. Effective action is urgently needed while there still is the opportunity to prevent extinctions and safeguard species, particularly those in higher risk categories.

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Section: Cracidae Yellow-knobbed Curassowmentioning

confidence: 99%

Section: Threats To Birds In Colombiamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tracking extinction risk trends and patterns in a mega-diverse country: A Red List Index for birds in Colombia

2020

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“…Taxonomy and nomenclature were adjusted to the South American Classification Committee of the American Ornithological Society [26]. From the complete species list, the global conservation status was determined according to the Red List of Threatened Species [27] and the national risk based on the Red Data Book of Birds of Colombia Volume I and II [28,29]. Species were also classified according to their migrant status (boreal or southern) or resident status [30].…”

Section: Birds Data Collectionmentioning

confidence: 99%

Long-term Christmas Bird Counts describe Neotropical urban bird diversity

Gálvis

Amaya-Espinel

Ramírez

2022

Preprint

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A significant gap in understanding the response of biodiversity to urban areas is the lack of long-term studies. Most of the information on urban birds comes from studies carried out in the northern hemisphere, and they include data that don't exceed three years. Although short-term studies contribute to knowledge about bird community diversity and their spatial distribution in urban areas, they could be biased towards more conspicuous and abundant species. One of the few multi-temporal datasets available for birds in urban areas is the Christmas Bird Count (CBC). Using annual CBC data available between 2001 and 2018 from 21 urban and peri-urban sample sites assessed from the main cities of Colombia, we identified and analyzed long-term trends on the cumulative diversity of bird communities as well as on their spatial distribution. We estimated comparative trends in richness, abundance, similarity, and complementarity of avifauna for each city and sample site based on their responses to urbanization and dietary guilds. We identified almost a quarter of the species registered in Colombia (464 of 1954). The representativeness of the community obtained during 18 years exceeds 84%, showing richness that ranges between 214 and 278 species in the three cities. Bird species and individuals registered showed wide variation of the sample sites. We found more dwellers, insectivorous and granivorous species in urban areas, with frugivores relegated to peri-urban sites, usually coinciding with avoider species. Natural peri-urban areas and intra-urban wetlands and urban parks were the most important refuges for birds and maintained the highest avoider and utilizer species richness. Long-term inventories are fundamental for determining consolidated bird diversity and distributional patterns. This information established a baseline for decision-making and applying recommendations that allow reconciling the growing demand for urban areas with the need to preserve the native avifauna in megadiverse Neotropical countries such as Colombia.

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“…Además, los estudios comparativos de densidades calculadas con metodologías estandarizadas permiten entender mejor la relación entre las causas de amenaza y la abundancia del objeto de conservación y proveen información para resolver los posibles problemas de manejo mediante diferentes mecanismos de conservación, incluida la declaración de áreas protegidas (Witmer, 2005). En ese sentido, las mediciones de abundancia con adecuados niveles de precisión y exactitud son claves para la evaluación periódica del riesgo de extinción de las especies, especialmente en escenarios de transformación (Gibbs, et al, 1998;Gibbs, et al, 1999;Legg & Nagy, 2006;Lindenmayer, et al, 2011;Lyons, et al, 2008;Ringold, et al, 1996;Renjifo & Amaya-Villarreal, 2017).…”

Section: Introductionunclassified

Densidad poblacional del Toro de Monte (Pyroderus scutatus) en el Santuario de Fauna y Flora Otún Quimbaya, Colombia

Ramírez-González

Pestaña

Hoyos-Abad

et al. 2021

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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La estimación de la abundancia de una especie aporta directamente a la comprensión de su estado de conservación. La medición de este parámetro en un primer momento (T0) es un referente para entender la dinámica de las poblaciones y poder inferir su viabilidad en paisajes transformados. Los bosques andinos y subandinos en Colombia han sido altamente intervenidos, pero la cuenca del río Otún es una de las zonas que aún tiene bosques extensos y relativamente continuos. Además, existen allí varias áreas protegidas de carácter nacional, regional y privado. En este territorio se encuentra una de las únicas poblaciones aparentemente abundantes del toro de monte (Pyroderus scutatus), especie en riesgo de extinción en Colombia (categoría vulnerable) por la reducción y fragmentación de su hábitat. Con el objetivo de generar información de base para determinar el estado de conservación de la especie, especialmente en el Santuario de Fauna y Flora Otún Quimbaya (SFFOQ), estimamos su densidad poblacional con el método de muestreo por distancia con transectos lineales. Calculamos la densidad poblacional de P. scutatus para el área protegida del SFFOQ en 64,48 individuos/km2 (IC95%: 39,74 – 104,61, CV=24,23 %), con una abundancia total de 315 individuos (IC95%: 194 - 512). Allí el tipo de ecosistema encontrado se extiende fuera de sus límites, hasta 12.000 ha relativamente continuas, que podrían hacer parte del área usada por esta población; no obstante, se necesitan registros de su presencia y mediciones de abundancia en toda la zona para estimar su área de ocupación en ella.

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Evolución del riesgo de extinción y estado actual de conservación de las aves de Colombia

Cited by 23 publications

References 28 publications

Tracking extinction risk trends and patterns in a mega-diverse country: A Red List Index for birds in Colombia

Tracking extinction risk trends and patterns in a mega-diverse country: A Red List Index for birds in Colombia

Long-term Christmas Bird Counts describe Neotropical urban bird diversity

Densidad poblacional del Toro de Monte (Pyroderus scutatus) en el Santuario de Fauna y Flora Otún Quimbaya, Colombia

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