Antonio Cabrera

Wildfire Scar Detection in Mediterranean Chile Using Sentinel-1 InSAR Coherence and Machine Learning: The 2017 “Las Máquinas” Megafire

Miguel Aguilera, Antonio Cabrera, Paulina Vidal-Páez, Pablo Sarricolea et autres

Wildfire monitoring using synthetic aperture radar (SAR) provides critical capabilities under challenging atmospheric conditions where optical sensors are limited by smoke and cloud cover. We evaluated Sentinel-1 C-band SAR interferometric coherence for Burned-area detection of the 2017 “Las Máquinas” megafire (Maule, Chile), …

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Microbial Allies from the Cold: Antarctic Fungal Endophytes Improve Maize Performance in Water-Limited Fields

Yessica San Miguel, Rómulo Santelices-Moya, Antonio Cabrera, Patricio Ramos

) to enhance maize drought tolerance under field conditions with different irrigation regimes. Drought stress reduced soil moisture to 59% of field capacity. UAV-based multispectral imagery monitored plant physiological status using vegetation indices (NDVI, NDRE, SIPI, GNDVI). Inoculated plants showed up to …

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Germination dynamics of Nothofagus glauca seeds: provenance-specific responses to temperature variation

Rómulo Santelices-Moya, Antonio Cabrera, Patricio Ramos, Rafael María Navarro-Cerrillo

Background: The influence of temperature on seed germination is crucial, and climate change effects on plant distribution are significant. To grasp climate change’s impact on terrestrial ecosystems, understanding plant adaptation to temperature shifts is vital. Nothofagus glauca, a vulnerable species endemic to …

Antarctic endophytic fungi enhance strawberry resilience to drought and heat stress by modulating aquaporins and dehydrins

María Alejandra Yáñez, Sebastián Flores, Francisca Hormazábal-Abarza, Stephan Pollmann et autres

• Climate change-induced heat waves and droughts threaten global food security. • Antarctic root endophytes boost strawberry tolerance to heat and drought stress. • Inoculated plants showed improved water retention, photosynthesis, and stress relief. • Endophytes influenced ABA signaling, aquaporins, and antioxidative …

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Updating the distribution of Nothofagus alessandrii: Impact of deforestation, fragmentation and connectivity

Antonio Cabrera, Carlos A. Rivas, Rafael María Navarro-Cerrillo, Rómulo Santelices-Moya

Nothofagus alessandrii forests in the Mediterranean region of Chile face significant threats from deforestation, fragmentation, wildfires, and climate change. This study investigated the temporal and spatial dynamics of N. alessandrii populations and their implications for habitat fragmentation and connectivity. Using remote sensing …

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Comparative Efficiency of Nitrogen Fertilization Levels in Two Sorghum Hybrids for Bioenergy Production

Antonio Cabrera, Miguel Aguilera-Peralta, Rómulo Santelices-Moya

To achieve sustainable and profitable production of sorghum for energy purposes, it is crucial to ensure the efficient use of the nutrients necessary for its growth and development. This research investigates the influence of diverse management practices on biomass production, nutrient use …

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Antarctic endophytic fungi modulate plant transcriptome to enhance physiological and biochemical performance of strawberry plants (Fragaria x ananassa) under drought and high temperatures.

M Ortega, Sebastián Flores, Francisca Hormazábal-Abarza, Stephan Pollmann et autres

Climate change poses a direct threat to food security, with global warming leading to detrimental droughts that affect plant development and agricultural productivity. This study focused on the symbiotic relationship between plants and microorganisms, known for their pivotal role in plant adaptation …

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Reproductive patterns in Araucaria araucana forests in the Andean range, Chile

Sergio Donoso Calderón, Karen Peña Rojas, Claudia Benavides Espinoza, Carolain Badaracco et autres

Abstract Background Araucaria araucana is a mast species that presents a high variability in annual cone production. Researchers have recorded synchronization events in cone production in different populations, which allows the seed production to be concentrated, reducing the percentage of seeds consumed …

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Effect of Silvicultural Treatments on Nothofagus glauca Forests Regarding Canopy Structure Patterns, Solar Radiation Transmission, and Tree Regeneration

Rómulo Santelices-Moya, Álvaro Promis, Miguel Peralta-Aguilera, Antonio Cabrera

This study focuses on the natural regeneration of Nothofagus glauca, a critical component of temperate forests in the Mediterranean region of the Southern Hemisphere in Chile. Various harvesting and canopy opening methods were evaluated to understand their impact on the regeneration of …

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Using UAVs and Machine Learning for Nothofagus alessandrii Species Identification in Mediterranean Forests

Antonio Cabrera, Miguel Peralta-Aguilera, Paula V. Henríquez-Hernández, Rómulo Santelices-Moya

This study explores the use of unmanned aerial vehicles (UAVs) and machine learning algorithms for the identification of Nothofagus alessandrii (ruil) species in the Mediterranean forests of Chile. The endangered nature of this species, coupled with habitat loss and environmental stressors, necessitates …

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Variación intraespecífica en Nothofagus alessandrii una especie endémica en peligro de extinción de los bosques mediterráneos de Chile

Rómulo Santelices-Moya, Antonio Cabrera, Patricia Silva‐Flores, Patricio Ramos

In forest conservation, especially in a changing climate, it is essential to understand the intraspecific variation of multiple functional traits in a species.Accordingly, the analysis of Nothofagus alessandrii, an endangered species from Chile, could play an important role as a basis for …

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Exploring the Spatial Dynamics of Endangered Nothofagus alesandrii and Its Relationship with Geomorphometric Variables and Native Tree Species in a Stand of Its Northern Distribution

Soledad Ovando-Mena, Freddy Mora, Rómulo Santelices-Moya, Carlos Palacios-Rojas et autres

Nothofagus alessandrii is an endangered species with limited and fragmented distribution in the Maule coastal forest of central Chile. Understanding the factors and processes that influence the natural growth of this species is crucial for mitigating its ecological vulnerability. The primary objective …

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