Bióloga, M.Sc. Universidad de Costa Rica, Dr. Sc. Universidad Nacional de Colombia. Interés en ecología de aves, cerca de 30 años de experiencia con estudio de aves y su conservación. Docente universitaria en U. de los Andes, U. Javeriana, U. Nacional, desde 2012 docente de la Facultad de Ciencias Ambientales de la U.D.C.A. en donde enseña y lidera investigaciones en el tema de conservación. Autora de diversas publicaciones en temas relacionados con dispersión de frutos, efecto de líneas eléctricas sobre la vida silvestre, aves de la sabana de Bogotá y su conservación; ha dirigido cerca de 20 trabajos de grado y posgrado en temas de ecología y conservación incluyendo efectos de las acciones humanas sobre la biodiversidad.
Loreta Rosselli Sanmartín
LÍNEAS DE INVESTIGACIÓN: Ecología y conservación de aves, Biología de la conservación, Restauración de ecosistemas
FACULTAD: Ciencias Ambientales e Ingenierías
CATEGORÍA COLCIENCIAS: Junior
NIVEL DE FORMACIÓN: Doctorado
The PREDICTS database: a global database of how local terrestrial biodiversity responds to human impacts
Fecha de publicación: 02/12/2014
Biodiversity continues to decline in the face of increasing anthropogenic pressures such as habitat destruction, exploitation, pollution and introduction of alien species. Existing global databases of species’ threat status or population time series are dominated by charismatic species. The collation of datasets with broad taxonomic and biogeographic extents, and that support computation of a range of biodiversity indicators, is necessary to enable better understanding of historical declines and to project – and avert – future declines. We describe and assess a new database of more than 1.6 million samples from 78 countries representing over 28,000 species, collated from existing spatial comparisons of local-scale biodiversity exposed to different intensities and types of anthropogenic pressures, from terrestrial sites around the world. The database contains measurements taken in 208 (of 814) ecoregions, 13 (of 14) biomes, 25 (of 35) biodiversity hotspots and 16 (of 17) megadiverse countries. The database contains more than 1% of the total number of all species described, and more than 1% of the described species within many taxonomic groups – including flowering plants, gymnosperms, birds, mammals, reptiles, amphibians, beetles, lepidopterans and hymenopterans. The dataset, which is still being added to, is therefore already considerably larger and more representative than those used by previous quantitative models of biodiversity trends and responses. The database is being assembled as part of the PREDICTS project (Projecting Responses of Ecological Diversity In Changing Terrestrial Systems – http://www.predicts.org.uk). We make site-level summary data available alongside this article. The full database will be publicly available in 2015.
Más información ⇨
The database of the PREDICTS (Projecting Responses of Ecological Diversity In Changing Terrestrial Systems) project
Fecha de publicación: 05/01/2017
The PREDICTS project—Projecting Responses of Ecological Diversity In Changing Terrestrial Systems (www.predicts.org.uk)—has collated from published studies a large, reasonably representative database of comparable samples of biodiversity from multiple sites that differ in the nature or intensity of human impacts relating to land use. We have used this evidence base to develop global and regional statistical models of how local biodiversity responds to these measures. We describe and make freely available this 2016 release of the database, containing more than 3.2 million records sampled at over 26,000 locations and representing over 47,000 species. We outline how the database can help in answering a range of questions in ecology and conservation biology. To our knowledge, this is the largest and most geographically and taxonomically representative database of spatial comparisons of biodiversity that has been collated to date; it will be useful to researchers and international efforts wishing to model and understand the global status of biodiversity.
Más información ⇨
Las aves de la Sabana de Bogotá. Cambios revelados por monitoreos a largo plazo» Biodiversidad 2017. Estado y tendencias de la biodiversidad continental de Colombia
Fecha de publicación: 01/09/2018
La gestión adecuada de la biodiversidad y los servicios que brinda en áreas urbanas y periurbanas requiere de información como insumo para la planeación. El monitoreo de poblaciones de especies realizado de forma periódica y a largo plazo no solo ofrece información sobre la presencia de especies en un lugar y momento, también revela tendencias poblacionales, lo que permite evidenciar distintos factores que están afectando dichas áreas.
Más información ⇨
Changes over 26 years in the avifauna of the Bogotá region, Colombia: Has climate change become important?
Fecha de publicación: 19/06/2017
High Neotropical mountains are among the most threatened ecosystems by climate change and this problem could be accentuated in cities where temperatures are higher. However, there are few data of long-term avifaunal changes in Neotropical cities, and the potential impact of climate change has yet to be addressed. Using data from 26 years of Audubon’s Christmas Bird Counts (CBCs) in the Bogotá area (ca. 2,600-3,100 m in Colombia’s eastern Andes), we analyze long-term changes of the avifauna using linear regressions corrected for species’ habitat preferences and compared urban and rural sites. For the CBC we followed the National Audubon Society’s methodology in which birds are counted over a 24-h period within a fixed circle 24 km in diameter. We recorded 235 species in the Bogotá circle with an average of 122 spp/year, including 46 boreal migrants, three endemic species, and four endemic subspecies, two globally and four locally threatened species. Species richness was higher in rural than in urban areas and most species were associated with native forest and scrub and wetlands. Among the species that were analyzed for changes in time 31% increased, 20% decreased, and 49% did not change. Strong fluctuations or changes in abundance were more frequent in urban than rural environments. Many of the species that increased or became established during the CBC interval came from lower elevations or the warmer, drier parts of the region beyond the count circle. By contrast, the lower elevational limits moved to higher elevations in several species that decreased. Climate change with its related effects represented the factor associated with the most changes in abundance. Other potential causes were direct human actions, mostly associated with urbanization, and «natural» successional changes in vegetation; predation by feral dogs and cowbird parasitism also affected several species negatively. Observations indicate that these factors will continue into the future, and the effects of climate change and urbanization in particular will probably intensify. The Bogotá CBC has provided much valuable information for Neotropical urban ornithology and its practice should be encouraged in other Latin American cities and should definitely continue in Bogotá for many years to come. © 2017 Stiles, Rosselli and De La Zerda.
Más información ⇨
Changes in the avifauna in a high Andean cloud forest in Colombia over a 24-year period
Fecha de publicación: 01/09/2017
The upper altitude ecosystems of the Andes are among the most threatened by climate change. Computer models suggest that a large percentage of species in these ecosystems will be at risk of extinction and that avian communities will suffer disruption and impoverishment. Studies in other Andean countries lend some support to these predictions, but there are no quantitative data from Colombia appropriate to test these models. In 1991–1992, we conducted a bird survey in a high Andean cloud forest to gather information about the species present and their abundance. We attempted to replicate this earlier study 24 yr later to detect any changes in the avifauna and determine possible causes for those changes. From June 2015 to May 2016, we made bimonthly trips to the study site and identified all birds detected either visually or by voice along a number of trails. We supplemented our observational data by also capturing birds in mist-nets. Community species richness and composition as well as the overall abundance of birds changed little from 1991–1992 to 2015–2016, but nearly 30% of bird species changed in abundance. Changes in the presence or abundance of nine or 10 species reflected upward shifts in elevational limits potentially due to climate change. However, most changes in abundance appeared to reflect changes in the vegetation of the study area due to successional changes in forest and subparamo habitats and a large number of relatively recent treefalls of old canopy trees with heavy epiphyte loads and subsequent changes in the understory vegetation. Our results suggest that the effects of climate change on the avifauna in our study area at a high-altitude site in Colombia are apparently occurring more slowly than predicted by recent computer models, although we conclude that the possible effects of climate change should definitely be considered in future studies. However, single-site studies such as ours have limitations in documenting elevation shifts; the most conclusive and quantitative evidence for elevational shifts comes from long-term studies conducted over a wide range of elevations. As such, we recommend establishment of such a monitoring program in Colombia because data obtained from such a program might be important in designing measures to mitigate the effects of climate change and conserve biodiversity. © 2017 Association of Field Ornithologists
Más información ⇨