Antecedentes: Las flores son elementos reproductivos costosos que presentan balances costo/beneficio en sus estructuras. La diversidad de éstas se ha atribuido a factores bióticos como las interacciones con sus visitadores florales y abióticos como las características del ambiente. Preguntas: ¿La morfología floral de M. geometrizans está relacionada con los tipos de vegetación? ¿La comunidad de artrópodos visitadores florales se relaciona con la morfología floral y/o el tipo de vegetación? ¿La morfología floral y la comunidad de artrópodos tendrán relación con la perturbación del ambiente? Especie de estudio: Myrtillocactus geometrizans (Mart. ex Pfeiff.) Console Sitio de estudio y fecha: Selva Baja Caducifolia y Matorral Xerófilo en las Reservas de la Biosfera Tehuacán-Cuicatlán, Puebla Barranca de Metztitlán, Hidalgo. México. Marzo 2017. Métodos: En los cuatro sitios (dos días por sitio), durante el pico de floración de M. geometrizans, se calculó el índice de disturbio, se recolectaron 30 flores (N = 120) y los artrópodos visitadores florales. Se determinaron la morfología floral y los artrópodos. Resultados: Los sitios de la Barranca de Metztitlán presentaron el mayor índice de disturbio, las flores más chicas y mayor número de estructuras florales. Los visitadores florales fueron más abundantes en los matorrales xerófilos, particularmente en el sitio más perturbado donde el grupo funcional más relevante fue el de los polinizadores. Conclusiones: Se encontraron diferencias significativas en la morfología floral de M. geometrizans relacionadas a los tipos de vegetación y ubicación geográfica. Se reportó una compensación entre tamaño y producción de estructuras florales.

Coastal cities in developing countries face increasing pressures from rapid urbanization, deteriorating infrastructure and weak enforcement of environmental regulations, leading to escalating ecological risks. In this context, Acapulco Bay—once one of Mexico's most emblematic tourist destinations—now exhibits chronic pollution, recurrent harmful algal blooms and significant ecosystem degradation. This Practice Insight examines how Environmental Risk Assessments (ERAs) can be operationalized to strengthen urban ecological governance, drawing on practitioner experience and environmental assessments conducted in the region. The study integrates Mexico's environmental regulatory frameworks with field‐based evidence of pollution sources and risk factors in Acapulco. Results indicate that, although ERAs are formally recognized in national legislation, they remain underutilized in municipal coastal management. By combining geospatial analysis, legal instruments, wastewater and solid waste diagnostics and community‐based observations, an intervention pathway is proposed to identify priority contamination sites, infrastructure failures and governance gaps. The Acapulco case demonstrates that ERA‐based approaches enable a shift from reactive actions towards systemic, science‐based strategies, while also evaluating municipal practices related to wastewater management, solid waste handling, stormwater drainage and coastal monitoring, highlighting their integration potential within ERA frameworks. Findings are applicable to other urban coastal systems in developing countries facing similar socio‐environmental pressures. Integrating ERAs into decision‐making, strengthening enforcement and enhancing public participation are critical to achieving more resilient coastal governance. Practical implication . This study recommends the institutional integration of ERAs into municipal planning and coastal management as a standard decision‐making tool. Specifically, local governments should (i) prioritize intervention areas using ERA frameworks, (ii) strengthen enforcement of existing regulations, (iii) upgrade wastewater and solid waste infrastructure based on risk diagnostics and (iv) incorporate community participation and monitoring schemes. These actions support a transition towards preventive, evidence‐based coastal governance.

Mammillaria parkinsonii and M. perbella are species endemic to the Queretano–Hidalguense Desert (QHD), a potential globose cacti Pleistocene refuge. We tested if the phylogeographic and genetic structures of these species are temporally consistent with the Pleistocene glacial refuge hypothesis. In this case, there would be high haplotype divergence associated with population contraction during the Last Glacial period (115-11.7 kya). Chloroplast DNA sequences and ISSR nuclear markers were used to estimate genetic diversity and structure, haplotype networks, and divergence times. Changes in paleodistribution were modeled using the Ecological Niche Model (MNE). cpDNA and ISSR markers revealed low-to-moderate genetic diversity in M. pakinsonii and M. perbella (π = 0.0004, 0.0044 respectively; H_S = 0.362–0.434, 0.293–0.400, respectively) and high population differentiation (G_ST = 1, 0.722, respectively; Φ_ST = 0.378, 0.3957, respectively), with no evidence of gene flow (Nm = 0, 0.29, respectively). The estimated divergence times and MNE showed that population divergence began during the Last Glacial in M. perbella and continued into the Holocene for both species. This divergence is associated with population contraction, geographic isolation, and disruption of gene flow. This joint evidence indicated that Pleistocene–Holocene glacial cycles may have driven the recent divergence of these Mammillaria species in the QHD.