Sustainable development is a process in which present and future human needs can be satisfied without degrading the socio-environmental systems that they rely upon. Inland wetlands are diverse ecosystems that provide numerous goods and services. Current wetland evaluation methodologies include inventories, monitoring of hydrological and climatic variables, population dynamic studies, mechanistic models, the use of geographical information systems, and measuring of biotic indices. Sustainability evaluation methods, which combine in a systemic approach production efficiency, ecosystem function, environmental services, and social values are required. In this study, a methodological framework was developed and applied to a case in the High Lerma River Basin in Central Mexico. Criteria and indicators comprising the environmental, economic, and social dimensions, as well as systemic attributes such as productivity, stability, resilience, selfreliance, and equity were derived and measured to evaluate wetland management systems. Native species were compared to the predominant carp monoculture system. Results from the evaluated indicators showed that the native species multicultural management system can be a feasible, profitable, and self-reliant conservation and utilization alternative. Some difficulties were faced in finding reliable estimates to be used as reference values, and potential indicators for future, long-term evaluations are proposed. The application of sustainability indicators to wetland management proved to be an objective and trustworthy methodological alternative, which could increase both wetland sustainability and the continuous development of integrated assessment tools for its evaluation.

Due to progressive urban development along the Mexican Caribbean coastline, it is crucial to gauge the impact of anthropogenic contamination of marine ecosystems through biomonitoring procedures.In the current study, we quantified the concentration of 49 inorganic elements in the blood and scute tissues of clinically healthy nesting hawksbill sea turtles (Eretmochelys imbricata). The elements were classified into four groups: Group A: essential mineral elements with toxic potential; Group B: non-essential elements with high toxicity; Group C: toxic non-essential minority elements and Trace Elements (TE); and Group D: rare-earth elements (REE) and other TE. Almost all the samples in both tissues showed perceptible levels of all the quantified elements. The only element identified with a correlation between blood and scute was arsenic (As), which could indicate a fast excretion through this type of keratinized tissue. The bio-accumulation of inorganic elements is a complex process, requiring the simultaneous examination of different tissues to evaluate the exposure. Our study reinforces the usefulness of scute tissue as a non-invasive sampling technique for the evaluation of persistent pollutants in marine turtles.

Most mosquito species are active during a certain part of the day, but climatic factors such as light intensity and relative humidity play an important role in the control of their activity. We selected three types of land use that were sampled in state of Campeche in 2018 (low semi‐evergreen forest, secondary low semi‐evergreen forest, and mango plantation), using ten CDC light traps baited with CO2, that were active during nine hours of three activity periods (dawn, noon, and nightfall). A GLM was used to investigate changes in the assembly of mosquitoes between different types of land use and temporal variations. Rank abundance curves were used to detect changes in the spatial and activity period of the mosquitoes and we then calculated the Exponential Shannon Index. A total of 6,110 mosquitoes belonging to 23 species were captured. The greatest richness and abundance were found in the secondary low semi‐evergreen forest, with greater richness and lower abundance than the mango plantation which showed more abundance. Of the activity periods, dusk had the greatest abundance and richness followed by dawn and finally noon.

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Resumen. Entre octubre y noviembre del año 2001 y mayo de 2002 se localizaron 16 sitios de percha de guajolote silvestre (Meleagris gallopavo mexicana) en la Sierra Fría de Aguascalientes. El 87.5% de los sitios se encontraron en bosques de pino-encino (en rodales de pinos), en altitudes de 2500 a 2650 m. En la parte alta (2/3) de la cuesta se localizaron 8 de los sitios y 7 sobre laderas de exposición noreste, en una pendiente promedio de 38.9 ± 12.6%. El 62.5% de los sitios se usaron durante todo el periodo de estudio y el resto, de manera ocasional. La mayoría de los dormideros se encontraron cerca de comederos o cebaderos y de parcelas agrícolas. Se contabilizaron de 1 a 23 árboles de percha utilizados por sitio, distribuidos a una distancia promedio de 24.4 ± 17.8 metros. El 81.2% de los árboles (n=170) fueron pinos (Pinus teocote, P. durangensis, P. leiophylla y P. michoacana), 17.6% encinos (Quercus laurina, Q. grisea y Q. eduardii) y 1.2% madroños (Arbutus arizonica). La altura promedio de los árboles fue de 16.6 ± 4.4 m y el diámetro 43.2 ± 11.5 cm. La preferencia del guajolote silvestre por utilizar pinos como dormideros en lugar de otras especies arbóreas, se debe posiblemente a que son árboles de mayor porte o a la conformación de su dosel; sin embargo, se ha observado que en lugares donde hay pocos pinos, los guajolotes utilizan para dormir otros árboles de características semejantes, como encinos, madroños o sicomoros.