National University of Austral Patagonia

This systematic review examines OpenAlex, focusing on its technical features and its applications within science studies and scientific information sources. The paper offers a critical perspective on OpenAlex’s role in democratizing and promoting equity in access to scientific information. A total of 178 articles published between 2022 and 2025 are analyzed and classified by functionality and application through a multi-database structured search complemented by a citation-based expansion strategy, including AI-based validation processes. Findings reveal the rapid adoption of OpenAlex as an open alternative to commercial databases, particularly across the Global South. However, notable metadata limitations—especially regarding affiliations, languages, and document types—still affect analytical reliability. The study highlights key opportunities and challenges for researchers, libraries, institutions, and the technical community, emphasizing the need for complementary validation and responsible assessment.

Mollusc species are ecologically and economically important, acting as fishery resources, ecosystem engineers, bioindicators, and invasive species. However, their study in Southern Patagonian rocky shores remains limited. This research aimed to study the mollusc assemblages and to explore the effect of environmental variables (salinity regime, wave exposure and seasonality) and substrate characteristics (inclination and elevation) on community descriptors. A seasonal sampling was conducted at two sites in Bahía San Julián: one exposed to wave action (SJO) and one sheltered (SJI). Additionally, a sheltered estuarine site was studied in Río Gallegos (RGE). The results showed that at lower horizontal substrates species richness was highest in exposed marine environments (SJO: 7–19 spp.), followed by sheltered marine (SJI: 5–13 spp.) and estuarine environments (RGE: 2–8 spp.). Total density peaked in exposed-marine environments at upper substrates (SJO: 23,000–38,000 ind/m2) and was lowest at lower substrates (ca. 2200–13,000 ind/m2), considering both orientations (horizontal and vertical). A distinct composition of mollusc assemblages were determined between sheltered-estuarine (RGE) and marine environments (SJI and SJO), and between substrate characteristics. The explained variation of mollusc abundance, was attributed mainly to salinity regime (32.8

The timing of breeding is a key component of a species’ realised niche and has been shown to be flexible to environmental change. Using a network of time-lapse cameras around Patagonia and the sub-Antarctic, along with citizen science assisted AI data extraction, we demonstrate that semi-automated extraction of phenological parameters is feasible without extensive human presence at colonies. Our comparative analysis of two related penguin species across the Polar Front reveals shifts in breeding phenology linked to environmental variation. The Southern Rockhopper Penguin showed a potential contraction of its breeding season, with consistent arrival but earlier departures in recent years. In contrast, Macaroni Penguins arrived and departed earlier, suggesting a temporal shift rather than a shorter season. These phenological changes correlated with winter-integrated SST rather than late-winter conditions, while reduced SST during pre-moult periods extended pre-moult duration and delayed migration. Despite marked phenological shifts in one species, breeding success remained stable, suggesting that timing changes may reflect flexible responses to environmental shifts rather than hidden survival costs. Species-specific differences in baseline phenology and temporal trends suggest that while some seabirds show phenological plasticity to ocean warming, stable breeding success may mask subtle but consequential impacts on sub-Antarctic population dynamics.

Abstract The distribution of plants with different photosynthetic pathways is strongly structured by climate, with C 3 plants favoured in cooler temperate regions and C 4 plants in hotter, high-light conditions. The relative abundance of C 3 and C 4 plants across the world has cascading impacts on local food webs, decomposition, productivity and other vital ecosystem processes. Human impacts, including climate change, changes to herbivore assemblages, and increased nutrient availability, are shifting the optimal conditions for important C 3 and C 4 -dominated ecosystems and crops. Using 3,184 plot-level observations from 112 sites across six continents, we reveal how chronic nutrient enrichment disrupts the climate-driven balance between C 3 and C 4 plants in grasslands. We found that, consistent with expectations, the global distribution of C 4 plants was strongly related to climate. However, experimental nutrient addition reduced the relative cover of C 4 species, with the strongest declines found when nitrogen and phosphorus were added together. Herbivore exclusion had no consistent effect on C 4 plants. Our results provide global experimental evidence that elevated nutrients, particularly nitrogen, alter competitive outcomes among plant functional types to suppress C 4 grasses, even in climatically optimal conditions. This has major implications for predicting vegetation responses to global change, with consequences for carbon cycling, primary productivity, herbivore dynamics, and food security.

La calle es un ‘lugar común’. Por ella, transitan las personas cada día de manera anónima rumbo a sus lugares de trabajo, de estudio, de diversión, de cobijo. Pero también, las personasocupan la callecon identidades específicas como ciudadanos, trabajadores, estudiantes. Cuando esto sucede, la calle deja de ser un espacio de tránsito para transformarse en un espacio de acción y de encuentro político, escenario de una acción que desborda las instituciones cuando éstas, o bien requieren el apoyo popular, o bien se manifiestan insuficientes a sus demandas.Sin embargo, cabe preguntarse si la calle puede ser algo más que un mero pasaje anónimo entre otros espacios con identidad propia o el escenario de expresiones extraordinarias de fuerza. El hecho de que las personas sin techo vivan en la calle, por ejemplo, constituye a este espacio como un punto de tensión en la dicotomía tradicional entre lo público y lo privado. Por otra parte, la incorporación de la noción de ‘lo común’, también tensiona esa dicotomía y aporta un elemento teórico enriquecedor para pensar el espacio de la calle. La hipótesis de este trabajoes que la calle juega un papel complejo en las relaciones y los mecanismos de poder, sobre todo si se incorporan concepciones relevantes de lo político y de lo biopolítico que ofrecen un ‘mirador’ para reflexionar sobre ella como espacio bio-político. De la mano de autores como Negri, Agamben y Esposito, proponemos explorar la calle como espacio biopolítico y las tensiones teóricas que se despliegan alrededor de ella como límite entre lo público y lo privado y como espacio de constitución de lo comúnen la acción de la multitud.