lunes, 10 de junio de 2024

Laboratorio de Evolución y Ecología Teórica  

Utilizamos modelos matemáticos para responder preguntas relacionadas a la sustentabilidad de sistemas socio-ecológicos  

Líneas de investigación activas: 

  • Caracterización cuantitativa de procesos de transición hacia la agricultura sustentable 
  • Uso de modelos coevolutivos para la identificación de agentes de control biológico 
  • Estimación de biodiversidad y secuestro de carbono en agroecosistemas 
  • Optimización de procesos en agricultura ecológica 


miércoles, 5 de junio de 2024

 Inside a tea master’s Paris salon | Her Scents of Pu Er 

viernes, 24 de mayo de 2024

Nonequilibrium dynamics in conservation biology: Scales, attractors and critical points  

Ricard Solé

Preserving and restoring biodiversity is becoming a great challenge as we face a world where planetary boundaries will likely be crossed over the following decades. Such challenge needs to consider multiple scales of complexity, both in space and time. A common threat in most cases is the presence of nonlinear phenomena generating shifts among alternative states. These breaking points imply a new perception of risk and different management strategies. A broad range of phenomena affect the preservation of healthy communities and constrain the ways to deal with conservation, from local features associated with habitat loss or facilitation to mesoscale or global network-level ecological complexity and the role played by extreme events. How are these scales connected? How can the emergent properties associated with ecosystem dynamics be exploited? Here a synthesis of ideas is presented, with a complex systems view of the different scales involved, the emergent phenomena separating them, and the universal properties that allow defining simple models on each scale.



A summary of the diverse interacting nonlinearities that are involved in this paper is depicted in this drawing by the author. Bifurcations, space and time are connected through the presence of transient dynamics, which affects ecosystem responses and resilience across space and time. Transients, as those related to ghosts close to saddle-node bifurcations, modify our expectations as derived from deterministic models and the fixed-point view of stability. The way time windows are affected by fluctuations is both a challenge (for prediction) and an opportunity (for management).

https://www.sciencedirect.com/science/article/pii/S0006320724001630

.

sábado, 18 de mayo de 2024

 A century of statistical Ecology


For over 100 years, Ecology has been an important venue for introducing novel statistical methods and providing accessible guides on best practices in statistical modeling. The proliferation of statistical ecology papers starting in the latter decades of the 20th century reflects an ongoing data revolution (e.g., remote sensing, volunteer-collected data, and automated data collection). The influx of new data types and increased computational power has driven a need for quantitative methods to explain and interpret increasingly large datasets while properly incorporating uncertainty. This collection showcases 36 influential statistical ecology papers that have been published in Ecology throughout its history. The collection is organized thematically, highlighting the areas of statistical ecology that have received the most attention in the journal. The authorship of the papers reflects the discipline’s historical lack of diversity; recent years have seen a rise in the diversity of authors, but more efforts are needed to fully reduce barriers to participation. The accompanying photo is a spring peeper (Pseudacris crucifer), one of the species featured in MacKenzie et al. (2002), which described the first occupancy model, an important advance in modeling species distributions while accounting for imperfect detection.

https://www.esa.org/blog/2024/05/15/a-century-of-statistical-ecology/

.

domingo, 12 de mayo de 2024

 Introducción la selección natural


¿Cómo es posible un diseño sin un diseñador?  

En este conjunto de videos se le da respuesta a esta pregunta.

Para esto se parte de ideas intuitivas simples, las cuales una vez formalizadas en lenguaje matemático, permiten demostrar cómo surgen diseños en la naturaleza, sin la necesidad de que detrás de estos se encuentre un diseñador.

https://n9.cl/r2zsu4

.



martes, 23 de abril de 2024

Can mutualists foster coexistence among resource competitors?

Mark McPeek

lunes, 15 de abril de 2024

miércoles, 10 de abril de 2024

 

Fungi, Forests, Group Selection (and Us?)

John Harte

martes, 2 de abril de 2024

Scaling up: microbiome manipulation for climate change adaptation in large organic vineyards

Carlos Pino and Diego Griffon

Regenerative agriculture offers important solutions to the enormous challenges that the climate crisis poses on food production. However, there are doubts about the possibility of implementing many of these solutions in a particularly important sector: the large scale. This paper addresses the issue, presenting examples of large-scale vineyard soil microbiome manipulation in Chile. The South American country has strongly faced the effects of climate change during the last decade and the organic viticulture sector is actively seeking strategies to adapt to the new climatic reality. Here the results of 4 experiments under real production conditions are shown. The experiments were designed to assess the effects of adding various microbial consortia to the soil on key agronomic parameters. Successful as well as unsuccessful cases are presented, allowing discussion of some conditions under which the microbiome manipulation can be expected to have positive effects. It was found that under good management conditions, incorporating effective microorganisms has positive effects on important production parameters (yield, root and vegetative growth). However, when fields yields are trending downward for prolonged periods, the incorporation of effective microbial consortia (e.g., antagonistic fungi, nutrient-fixing and nutrient-solubilizing bacteria) does not have a positive effect on the vineyard trend immediately. Similarly, even in favorable conditions the positive effects cannot be expected to be expressed in the short term (i.e., in just a few months). Therefore, its use should be conceived as a long-term strategy, not as an immediate solution to urgent management problems.