Oswaldo Jadán
A5013848129- Ecology and Vegetation Dynamics Studies
- Species Distribution and Climate Change
- Cocoa and Sweet Potato Agronomy
- Plant and animal studies
- Forest ecology and management
- Rangeland Management and Livestock Ecology
- Scarabaeidae Beetle Taxonomy and Biogeography
- Agroforestry and silvopastoral systems
- Plant Taxonomy and Phylogenetics
- Basque language and culture studies
- Soil Carbon and Nitrogen Dynamics
- Rangeland and Wildlife Management
- Mediterranean and Iberian flora and fauna
- Conservation, Biodiversity, and Resource Management
- Food Chemistry and Fat Analysis
- Tree-ring climate responses
- Environmental and Ecological Studies
- Agriculture and Rural Development Research
- Essential Oils and Antimicrobial Activity
- Soil erosion and sediment transport
- Archaeological and Geological Studies
- Oil Palm Production and Sustainability
- Animal Behavior and Reproduction
- Plant Water Relations and Carbon Dynamics
- Avian ecology and behavior
University of Cuenca
2016-2025
Universidad Rey Juan Carlos
2021-2023
Universidad Nacional de Loja
2014
Ministerio de Ciencia, Tecnología y Medio Ambiente
2012
Grazing represents the most extensive use of land worldwide. Yet its impacts on ecosystem services remain uncertain because pervasive interactions between grazing pressure, climate, soil properties, and biodiversity may occur but have never been addressed simultaneously. Using a standardized survey at 98 sites across six continents, we show that soil, are critical to explain delivery fundamental drylands Increasing pressure reduced service in warmer species-poor drylands, whereas positive...
Our knowledge about the structure and function of Andean forests at regional scales remains limited. Current initiatives to study over continental or global still have important geographical gaps, particularly in regions such as tropical subtropical Andes. In this study, we assessed patterns tree species diversity along ~ 4000 km latitude m elevation range forests. We used Forest Network (Red de Bosques Andinos, https://redbosques.condesan.org/) database which, present, includes 491 forest...
Aulonemia queko Goudot (Poaceae, Bambusoideae) is a species of great cultural importance that has been used as non-timber forest product in Andean forests for centuries. Despite inhabiting montane vulnerable to deforestation, its distribution not thoroughly assessed conservation. This study analyzes potential at the regional scale (the four countries where it distributed) and locally (in greater detail within Ecuador), using presence records climatic land-use data. Maxent was identified best...
This study explores how floristic composition, diversity, and woody vegetation structure vary across zones in Andean montane forests under the dominance of Aulonemia queko Goudot (Poaceae, Bambusoideae) dominance. As a culturally ecologically significant non-timber forest product, A. plays key role shaping plant communities requires effective propagation strategies for sustainable management. Significant differences composition were observed among zones, with indicator species identified...
La production de cacao dans la région ama- zonienne l’Équateur représente une source revenus importante pour popu- lation locale. Les systèmes varient entre forêt primaire enrichie, agroforestiers traditionnels et monoculture. Cette étude vise à évaluer relation diversité spécifique, stocks carbone, productivité agricole utilisations potentielles des ressources forestières trois modes d’utilisation terres amazonienne : agrofo- resterie dominante cacaoyère (AF Cacao), monoculture...
Abstract We introduce the FunAndes database, a compilation of functional trait data for Andean flora spanning six countries. contains on 24 traits across 2,694 taxa, total 105,466 entries. The database features plant-morphological attributes including growth form, and leaf, stem, wood measured at species or individual level, together with geographic metadata (i.e., coordinates elevation). follows field names, descriptions units measurement TRY database. It is currently available in open...
A pesar de la creciente evidencia del efecto los sistemas productivos tradicionales sobre el secuestro y almacenamiento carbono, pocas investigaciones se han realizado para examinar esta relación entre bosque con base a mitigación al cambio climático, especialmente en ecosistemas amazónicos. La presente investigación realizó zona baja Reserva Biosfera Sumaco, Provincia Napo, Amazonía ecuatoriana. Se determinó promedio Carbono (C) biomasa aérea suelo, siete uso suelo: Bosque primario,...
En este estudio se evaluó un sistema de bosque y tres sistemas agroforestales SAFs, tradicionales denominados localmente “chakras” con cultivo cacao propagado sexual asexualmente dentro cuatro uso la tierra: 1) primario, 2) chakra por semilla; 3) injerto 4) sin comercial, en Reserva Biosfera Sumaco, Ecuador. Se analizó las variables área total muestreo 6,92 has promedios parcela aplicando ANDEVA, correlaciones Pearson regresiones lineales. La riqueza, abundancia, basal volumen comercial...
Increases in the abundance of woody species have been reported to affect provisioning ecosystem services drylands worldwide. However, it is virtually unknown how multiple biotic and abiotic drivers, such as climate, grazing, fire, interact determine dominance across global drylands. We conducted a standardized field survey 304 plots 25 countries assess climatic features, soil properties, fire dryland rangelands. Precipitation, temperature, grazing were key determinants tree shrub dominance....
Vascular epiphytes layer is an important component of the forests; to understand their contribution ecosystem, it imperative assess factors which affect distribution, composition, and diversity. We studied ecology vascular in Andean Mountain Forests different successional stages, a scenario that allowed us determine some relationships between composition epiphyte community tree communities, along with environmental historic land use gradients. The research design included sampling 22 plots...
In the Andean mountains of southern Ecuador there are areas occupied by high secondary forests as a consequence anthropic activities.Here we identify different forest communities located over 2900 m a.s.l, based on its floristic similarity.In each community, composition was described total exclusive and shared species.Estimation curves were used to provide richness diversity metrics.The structure analyzed according abundance basal area.In addition, evaluated role environmental variables in...
Composition, diversity, and structure of trees in tropical montane forests are responsive to ecological gradients local succession. Those parameters a result interactions between vegetation, environment, location. This study identified floristic groups on mainly secondary evaluated how the composition, correlate with climate, soil, age since abandonment. We included our models measurement spatial correlation, explore role dispersion. For this purpose, we measured diameter height all DBH ≥ 10...
En los Andes occidentales del sur Ecuador existen remanentes de bosques tropicales montanos andinos, BTMA, que merecen ser estudiados ecológicamente para valorarlos y conservarlos. El objetivo esta investigación fue describir la diferencia parámetros taxonómicos funcionales vegetación arbórea y, además, explicar su relación con variables predictoras. Se utilizaron predictoras clima, suelos una autocorrelación espacial las diferencias en composición, diversidad, densidad arbórea, biomasa...
<p>Se caracterizaron la diversidad, estructura horizontal y vertical de vegetación arbórea arbustiva en cacaotales tradicionales bosque maduro. Se evaluó diversidad alfa, beta se identificaron relaciones entre riqueza con arbórea. El registró los mayores valores especies, abundancia estructura, seguido por el sistema agroforestal tradicional cacao semilla. Las especies más importantes ecológicamente fueron <em>Iriartea deltoidea </em>y<em> Otoba glycycarpa....
Los bosques y páramos andinos poseen alta riqueza de especies, pero están amenazados constantemente por deforestación. La regeneración natural arbórea estos ecosistemas condiciona su estructura funcionalidad en el futuro, ha sido escasamente evaluada. En Andes del sur Ecuador, también existen plantaciones forestales Pinus patula (pino) abandonadas, que podrían ser escenarios para promover la natural. un gradiente altitudinal andino, se evaluó florísticamente parámetros dos estudio: naturales...
The Royal Sunangel (Heliangelus regalis) is endemic to sandstone ridges in southeast Ecuador and northeast Peru. This hummingbird currently considered endangered, although little has been published on its natural history, distribution, conservation. We found H. regalis three habitat types, but abundance was higher stunted shrubland, at ridgetops. It observed feed seven plant species, mostly following regular feeding routes, between 0 2.5 m above ground. describe six different vocalizations,...
Tropical mountain ranges shape the structure of tree communities and promote highly diverse natural habitats. The "Bosque Protector Chongón-Colonche" (BPCC), an 86,000-ha formation situated on coast Ecuador, is biogeographically important for region by connecting floristic elements wet Choco dry Tumbesian forests. Our understanding factors that model palm diversity distribution in this range are limited. We measured identified all trees palms (DBH ≥10 cm) 289 plots 0.2 ha, distributed...