Naturaleza vulnerada. Cuatro décadas de agricultura industrializada de frutas y hortalizas en el sur de Jalisco, México (1980–2020)

Macías, Alejandro Macías; García, Yolanda Lizeth Sevilla

doi:10.31644/ed.v8.n1.2021.a03

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Seven land covers, which represent more than 95% of the studied area, showed a significant (p < 0.05) positive albedo difference α2021 -α2014, leading to an increase in albedo of 2.16% on average for the whole study area (Mann-Whitney U Test, p < 0.05). The deforestation process that Tapalpa has experienced during the last years could explain this increment in albedo [10,36,37].…”

Section: Discussionmentioning

confidence: 99%

Deforestation and Its Effect on Surface Albedo and Weather Patterns

et al. 2023

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Deforestation is an important environmental problem and a key promoter of regional climate change through modifying the surface albedo. The objective of this research was to characterize the impact of deforestation and land use changes on surface albedo (α) and climate patterns in a tropical highland region of Mexico, between the years 2014 and 2021. The main land cover types are coniferous forests (CF), oak and gallery woodlands (OGW), and annual agriculture (AA), which represent more than 88% of the regional territory. We used 2014 and 2021 Landsat 8 OLI images with topographic and atmospheric correction in order to develop an inventory of albedo values for each land cover type in both time scenarios. Albedo images were generated by using the equation proposed by Liang in 2001, which is based on the reflectance of the bands 2, 3, 4, 5, and 7. Differences in albedo values were calculated between the years 2014 and 2021, and those differences were correlated with variations in climate parameters, for which we used climate data derived from the WRF model. In addition, the different land use changes found were classified in terms of triggers for increasing or decreasing surface albedo. We used the Mann–Whitney U Test to compare the 2021 − 2014 climatic deviations in two samples: Sample A, which included sites without albedo change in 2021; and Sample B, including sites with albedo change in 2021. Results showed that between 2014 and 2021, at least 38 events of land use change or deforestation occurred, with albedo increments between 1 and 11%, which triggered an average increment of 2.16% (p < 0.01; Mann–Whitney U Test) of the regional surface albedo in comparison to the 2014 scenario. In this period, the albedo for CF, OGW, and AA also increased significantly (p < 0.001; Mann–Whitney U Test) by +79, +12, and +9%, respectively. In addition, the regional albedo increment was found to be significant and negatively correlated (p < 0.01 Spearman’s coefficient) with relative humidity (RH), maximum temperature (Tmax), and minimum temperature (Tmin), and correlated (p < 0.01) positively with diurnal temperature range (DTR). The Mann–Whitney U Test revealed that 2021 climatic variations in Sample B sites are statistically different (p < 0.05) to 2021 climatic variations in Sample A sites, which demonstrates that albedo changes are linked to a decrease in minimum temperature and relative humidity and an increase in DTR. Conversion of CF and OGW into AA, perennial agriculture (PA), or grassland (GR) always yielded an albedo increment, whilst the conversion of AA to irrigation agriculture (IA) or PA triggered a decrease in albedo, and finally, the pass from GR or AA to protected agriculture (PA) caused albedo to increase or decrease, depending on the greenhouse covers materials. Reducing deforestation of CF and OGW, conversion of AA or GR into PA, and selecting adequate greenhouse covers could help to mitigate regional climate change.

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Section: Discussionmentioning

confidence: 99%

Deforestation and Its Effect on Surface Albedo and Weather Patterns

et al. 2023

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Ethnobotany as a Tool to Teach Science in Rural Schools: A Case Study in Western Mexico

Flores-Silva,

Cuevas-Guzmán,

Baptista

2024

Journal of Ethnobiology

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As formal education is increasingly valued among rural and Indigenous communities, a common assumption is that local ecological knowledge may simultaneously become devalued or lost. To solve this, several scholars point out that using ethnobotanical knowledge to teach science can be a great way to engage students and help them learn scientific concepts in a more meaningful way and develop a deeper appreciation for their local environment and culture. Through a school herbarium project in three rural schools in western Mexico, students developed different activities, experiments, and applied ethnobotanical tools in order to learn about plant science. A total of 39 wild edible species were collected by students, from which they obtained information about their local name, seasonality, preparations, where they could be found and uses other than food. As the students developed the different activities of the school herbarium project, they not only shared their prior knowledge but were also able to expand that knowledge with scientific information and value into their own ethnobotanical knowledge by learning in accordance with cultural context. The use of ethnobotany as a tool to teach science proved to be a good way not just to learn scientific concepts in a contextualized way but also to revitalize the local ethnobotanical knowledge.

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Naturaleza vulnerada. Cuatro décadas de agricultura industrializada de frutas y hortalizas en el sur de Jalisco, México (1980–2020)

Cited by 2 publications

References 6 publications

Deforestation and Its Effect on Surface Albedo and Weather Patterns

Deforestation and Its Effect on Surface Albedo and Weather Patterns

Ethnobotany as a Tool to Teach Science in Rural Schools: A Case Study in Western Mexico

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