Santiago Madriñán

Los Andes University (Colombia) | UNIANDES · Department of Biological Sciences

El bosque seco tropical del Jardín Botánico de Cartagena es uno de los pocos remanentes protegidos cerca de esta ciudad. Su estado de conservación y la abundancia de nacimientos de agua en la zona lo hacen único entre los remanentes de este ecosistema en el Caribe colombiano. En este contexto, el objetivo del presente estudio fue evaluar la estruct...

The tropical dry forest (TDF) is one of the most threatened ecosystems worldwide due to the historical conversion of its lands to pastures and crops. The TDF of the Cartagena Botanical Garden “Guillermo Piñeres” (JBGP), one of the last TDF relicts near Cartagena, is an isolated fragment of 3 ha located in a humid area caused by the presence of the...

https://therevelator.org/paramos-threats-hotspot/

https://therevelator.org/paramos-threats-hotspot/

Educational strategies that allow the public to understand scientific methods are needed to close the gap between science and society, and raise awareness of global challenges. A permanent forest plot within a botanical garden is a unique opportunity to communicate these methods, educate about climate change, and highlight the importance of conserv...

Understanding how species diversify and evolve in species-rich areas like the lowland rain forest in the Neotropics is critical for conservation in times of unprecedented threats. To determine how the Andean uplift, the formation of the Panama land bridge, and Pleistocene climatic fluctuations affected dispersal and diversification in the Sapotacea...

El Jardín Botánico José Celestino Mutis ha enfocado sus esfuerzos en promover una visión integrada de las coberturas vegetales urbanas y periurbanas, mediante la interacción de la arborización, jardinería, restauración o rehabilitación ecológica y la agricultura urbana. Es así como el Manual de coberturas vegetales urbanas de Bogotá D. C., obra pro...

The success of antifungal therapies is often hindered by the limited number of available drugs. To close the gap in the antifungal pipeline, the search of novel leads is of primary importance, and here the exploration of neglected plants has great promise for the discovery of new principles. Through bioassay-guided isolation, uliginosin B and five...

The success of antifungal therapies is often hindered by the limited number of available drugs. To close the gap in the antifungal pipeline, the search of novel leads is of primary importance, and here the exploration of neglected plants has great promise for the discovery of new principles. Through bioassay-guided isolation, uliginosin B and five...

[This corrects the article DOI: 10.3389/fpls.2019.01035.].

https://telesantander.com/vulnerabilidad-de-los-paramos-de-colombia/

https://telesantander.com/vulnerabilidad-de-los-paramos-de-colombia/

https://www.semana.com/actualidad/articulo/conozca-la-lista-de-vulnerabilidad-de-los-paramos-de-colombia-noticias-hoy/56678/

https://sostenibilidad.semana.com/actualidad/articulo/conozca-la-lista-de-vulnerabilidad-de-los-paramos-de-colombia-noticias-hoy/56678

https://youtu.be/6C5ebHWYnKs

https://www.eltiempo.com/vida/medio-ambiente/ranking-de-los-paramos-mas-vulnerables-en-colombia-542983

https://www.elespectador.com/noticias/medio-ambiente/crean-ranking-de-vulnerabilidad-de-paramos-de-colombia-hoy/

http://agenciadenoticias.unal.edu.co/detalle/article/ranking-de-vulnerabilidad-de-paramos-colombianos.html

https://www.larepublica.co/economia/estos-son-los-paramos-mas-vulnerables-en-una-proyeccion-a-30-anos-segun-investigacion-3073011

https://www.elespectador.com/noticias/medio-ambiente/crean-ranking-de-vulnerabilidad-de-paramos-de-colombia-hoy/

https://www.larepublica.co/economia/estos-son-los-paramos-mas-vulnerables-en-una-proyeccion-a-30-anos-segun-investigacion-3073011

http://agenciadenoticias.unal.edu.co/detalle/article/ranking-de-vulnerabilidad-de-paramos-colombianos.html

https://www.eltiempo.com/vida/medio-ambiente/ranking-de-los-paramos-mas-vulnerables-en-colombia-542983

Species are often regarded as basic units of study in biology, following the presumption that they are real and discrete natural entities. But several biologists wonder if species are arbitrary divisions that do not correspond to discrete natural groups of organisms. Two issues must be addressed to solve this controversy, but few studies seem to do...

Coca is the natural source of cocaine as well as a sacred and medicinal plant farmed by South American Amerindians and mestizos. The coca crop comprises four closely related varieties classified into two species (Amazonian and Huánuco varieties within Erythroxylum coca Lam., and Colombian and Trujillo varieties within E. novogranatense (D.Morris) H...

Some of the largest impacts of climate change are expected in the environmentally heterogeneous and species rich high mountain ecosystems. Among those, the Neotropical alpine grassland above the tree line (c. 2,800 m), known as Páramo, is the fastest evolving biodiversity hotspot on earth, and one of the most threatened. Yet, predicting climate res...

https://www.courthousenews.com/andean-sky-islands-and-alpine-sunflowers-at-risk-of-disappearing-forever/

https://phys.org/news/2020-09-sky-islands-tropical-alpine-sunflowers.html

https://sciencecodex.com/sky-islands-and-tropical-alpine-sunflowers-risk-disappearing-657180

https://www.scientificamerican.com/arabic/articles/news/sky-islands-and-tropical-alpine-sunflowers-at-risk-of-disappearing/

https://www.eurekalert.org/pub_releases/2020-09/f-sia091120.php

https://blog.frontiersin.org/2020/09/24/ecology-evolution-climate-change-andes-paramos-espeletia-extinction-threat/

https://scienmag.com/sky-islands-and-tropical-alpine-sunflowers-at-risk-of-disappearing/?fbclid=IwAR2SeMTMiKMXJT5JzPkh_MXRtkGWMjcELH3kVXUzc3vgqGh9yLhoeY1ueOc

https://blog.frontiersin.org/2020/09/24/ecology-evolution-climate-change-andes-paramos-espeletia-extinction-threat/

https://www.eurekalert.org/pub_releases/2020-09/f-sia091120.php

https://www.courthousenews.com/andean-sky-islands-and-alpine-sunflowers-at-risk-of-disappearing-forever/

https://sciencecodex.com/sky-islands-and-tropical-alpine-sunflowers-risk-disappearing-657180

https://www.scientificamerican.com/arabic/articles/news/sky-islands-and-tropical-alpine-sunflowers-at-risk-of-disappearing/

https://phys.org/news/2020-09-sky-islands-tropical-alpine-sunflowers.html

https://scienmag.com/sky-islands-and-tropical-alpine-sunflowers-at-risk-of-disappearing/?fbclid=IwAR2SeMTMiKMXJT5JzPkh_MXRtkGWMjcELH3kVXUzc3vgqGh9yLhoeY1ueOc

With the advent of next-generation sequencing technologies, whole-plastome data can be obtained as a byproduct of low-coverage sequencing of the plant genomic DNA. This provides an opportunity to study plastid evolution across groups, as well as testing phylogenetic relationships among taxa. Within the order Malpighiales (∼16,000 spp.), the Podoste...

The Chingaza paramo complex is located in the Colombian eastern Cordillera, in the departments of Cundinamarca, Boyacá and Meta. Most of our current knowledge about this complex comes from studies conducted near Bogotá and some focal sectors in the National Natural Park Chingaza. The goal of this study was to characterize the treeline transition zo...

This is a photographic compilation of the seeds of tree species of the tropical dry forest of the Jardín Botánico de Cartagena "Guillermo Piñeres". Can be used for seed identification.

This is a photographic compilation of the seeds from trees native to the Colombian Caribbean Tropical Dry Forest, It can be used for identification.

Sections Casparya and Semibegoniella are some of the most species rich groups of Begonia in the North Andean region. Taken together, both sections are clearly recognizable with respect to other sections of Begonia because of their distinctive fruits that open at the back of the locules and usually have no wings but horns, however the differences be...

How diversity arises and what is the relative role of allopatric and ecological divergence are among the most persistent questions in evolution and ecology. Here, we assessed whether ecological divergence has enhanced the diversification of the Neotropical alpine plant complex Espeletia, also known as frailejones. This genus has one of the highest...

Identity of the 19 Espeletia populations used in this study and spanning 162 samples growing in 3 different habitats and 6 localities. Taxa names follow Cuatrecasas (2013). Populations’ abbreviations are given by the combination of codes for localities and ecotypes. Localities are coded as follows: Chingaza (CH), Cocuy (CO), Guantiva (GU), Santurbá...

Cloudgram depicting SNAPP-based phylogenetic trees of the Espeletia populations analyzed in the current study using 1,273 GBS-derived SNP markers. Populations from Santurbán (SA) were used as out-groups for rooting the phylogenetic trees following Diazgranados and Barber (2017). Populations’ names are given by the combination of codes for localitie...

Networks depicting bidirectional gene flow patterns leading to panmixia (Nem > 1) among populations of Espeletia. The width of the green lines is proportional to the number of migrants per generation (Nem) and are shown only if Nem > 1. First row of diagrams are based on the entire set of populations (A–D), whereas second and third rows only includ...

Correlations between genetic differentiation, geographic distance and ecological distance (exposure to frost and soil moisture content) among populations of Espeletia growing in 3 different habitats and 6 localities. First column of diagrams show FST/(1 – FST) vs. geographic distance (i), following Rousset (1997), while second and third columns sho...

Evanno’s delta K for the unsupervised Bayesian genetic clustering conducted in STRUCTURE with 1,273 GBS-derived SNP markers. K values ranged from K = 2 to K = 19. Transformed likelihoods of the graph model from Evanno et al. (2005) are shown in the vertical axis.

Population structure from assignment tests in STRUCTURE based on 1,273 variable SNP markers. Probabilities are shown for the optimum K-value (K = 9, Supplementary Figure S2) according to Evanno et al. (2005), the PCoA (Figure 2) and visual inspection. Populations are abbreviated as in Supplementary Table S1.

Inset of the population structure for the Guantiva – Chingaza – Sumapaz complex as revealed by a principal coordinates analysis (PCoA) based on 1,273 GBS-derived SNP markers. Ecotypes are labeled by different symbols as follows: caulescent populations from the cloudy forest (+), caulescent populations from wind-sheltered well-irrigated depressions...

Genome–environment association (GEA) analyses between the SNP markers and the localities, and between the SNP markers and the habitats. Habitats were ranked according to the theoretical exposure to frost and the theoretical soil moisture content, as coded in Supplementary Table S1. Given are eighteen QQ-plots of -log10 (P-value) for generalized (GL...

https://www.palmira.unal.edu.co/noticias/index.php/es/noticias/facultad-de-ingenieria-y-administracion/item/619-en-2050-paramo-del-altiplano-cundiboyacense-seria-el-mas-amenazado-del-pais

https://www.palmira.unal.edu.co/noticias/index.php/es/noticias/facultad-de-ingenieria-y-administracion/item/619-en-2050-paramo-del-altiplano-cundiboyacense-seria-el-mas-amenazado-del-pais

The Andean Lupinus radiation presents one of the highest rates of net species diversification in plants and includes species with a wide variety of growth forms, but the detailed geographical and adaptive trajectories of diversification in the Andes remain unresolved. One of the most distinctive of these growth forms is the fistulose-inflorescence...