A monthly gridded burned area database of national wildland fire data.

We assembled the first gridded burned area (BA) database of national wildfire data (ONFIRE), a comprehensive and integrated resource for researchers, non-government organisations, and government agencies analysing wildfires in various regions of the Earth. We extracted and harmonised records from different regions and sources using open and reproducible methods, providing data in a common framework for the whole period available (starting from 1950 in Australia, 1959 in Canada, 1985 in Chile, 1980 in Europe, and 1984 in the United States) up to 2021 on a common 1° × 1° grid. The data originate from national agencies (often, ground mapping), thus representing the best local expert knowledge. Key opportunities and limits in using this dataset are discussed as well as possible future expansions of this open-source approach that should be explored. This dataset complements existing gridded BA data based on remote sensing and offers a valuable opportunity to better understand and assess fire regime changes, and their drivers, in these regions. The ONFIRE database can be freely accessed at https://zenodo.org/record/8289245 .

On-off intermittency and irruptions in host-parasitoid dynamics.

Environmental stochasticity affects population dynamics in a variety of ways, including the possibility of drastic modifications in the stability properties of the ecosystem. In this work, we investigate a case of coupled host-parasitoid dynamics adopting Beddington's conceptual two-dimensional map. We stochastically perturb some of the parameters controlling either the host dynamics or the host-parasitoid interaction, observing a dramatic change in the system dynamics with the emergence of on-off intermittency, a behavior characterized by the irregular alternation between quiescent phases and sudden population bursts. This phenomenon is herein offered as a qualitative, environmental-based description of population outbreaks.

Reasoning in Life: Values and Normativity in Georges Canguilhem.

This paper aims at giving an account of the philosophy of norms of Georges Canguilhem in the framework of his philosophical vitalism. According to Canguilhem, vitalism is not a metaphysical or ontological theory, but rather a general attitude or a perspective about life and living beings, both understood employing the axiological concept of 'normativity'. This notion allows Canguilhem to enlarge the concept of life beyond the field of biological phenomena, encompassing also phenomena of the social world, included technique and scientific knowledge and rationality. Canguilhem's perspective relocates human activities within a vitalistic conception of life, which redefines the meaning of human reason by putting it in relation to values and norms.