Socioeconomic Change and Its Impact on Forest Resources in the Basin of Mexico

Ezcurra, Exequiel; Mazarí-Hiriart, Marisa; Pisanty, Irene; Aguilar, Adrián Guillermo

doi:10.1007/978-0-387-22520-3_2

Cited by 8 publications

(5 citation statements)

References 7 publications

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“…The structural connectivity between landscape units in Mexico City increases the risk of flooding, given the geomorphological characteristics of the area, as well as the processes that drag sediment from the upper part of the basin to the low areas, where human settlements are located (Kalantari et al 2017). The water flows through superficial rivers and aquifers from the highlands where the heaviest rain occurs (Ezcurra et al 2006), discharging at the lowest part of the basin (Garrido et al 2010), where floods are common. This infrastructure (roads and pipes) accelerates water runoff from the highlands, resulting in rapid and large inundation events in the lowlands (Chen et al 2009;Kalantari et al 2014).…”

Section: Study Areamentioning

confidence: 99%

Influence of solid waste and topography on urban floods: The case of Mexico City

Zambrano

Pacheco-Muñoz

Fernández

2018

Ambio

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Floods in cities are increasingly common as a consequence of multifactor watershed dynamics, including geomorphology, land-use changes and land subsidence. However, urban managers have focused on infrastructure to address floods by reducing blocked sewage infrastructure, without significant success. Using Mexico City as a case study, we generated a spatial flood risk model with geomorphology and anthropogenic variables. The results helped contrast the implications of different public policies in land use and waste disposal, and correlating them with flood hazards. Waste disposal was only related to small floods. 58% of the city has a high risk of experiencing small floods, and 24% of the city has a risk for large floods. Half of the population with the lowest income is located in the high-risk areas for large floods. These models are easy to build, generate fast results and are able to help to flood policies, by understanding flood interactions in urban areas within the watershed.

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Section: Study Areamentioning

confidence: 99%

Influence of solid waste and topography on urban floods: The case of Mexico City

Zambrano

Pacheco-Muñoz

Fernández

2018

Ambio

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“…Originally, this area was characterized by several vegetation types, including pine, oak and oak‐pine forests, among others, growing on a soil partially covered by lava (González‐Hildago et al 2001). The area is also one of the most important sources for recharging aquifers in the Basin of México (Ezcurra et al 2001). For this reason, the area has been protected since 1989, when unregulated urban settlements caused a severe disturbance (Soberón et al 1991).…”

Section: Introductionmentioning

confidence: 99%

Natural priming as an important metabolic event in the life history of Wigandia urens (Hydrophyllaceae) seeds

Gamboa‐deBuen

Cruz-Ortega

Martínez‐Barajas

et al. 2006

Physiologia Plantarum

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Natural priming promotes fast and synchronic seed germination and enhances the establishment of seedlings from Wigandia urens seeds. In this study, seeds of this species were buried in the field in three different sites, and each site was divided into three different microsites (natural priming). They were then exhumed and air-dried at the beginning of the rainy season. The control and exhumed W. urens seeds were tested for differences in germination, and in the protein patterns derived from heat-stable and phospho-protein enriched fractions, sucrose concentrations, amylase isoenzyme patterns, as well as catalase activity and H 2 O 2 levels. All the exhumed seeds germinated faster and more synchronically than the control seeds. Nevertheless, the germinative pattern showed a microsite effect related to the microenvironmental conditions. Most exhumed samples kept the germinative advantages acquired from the soil during natural priming for 2 years but seeds from the most heterogeneous site (a forest gap) did not. Natural priming also promoted mobilization of 7-S globulin-like proteins, solubilization of the 11-S globulinlike proteins as well as sucrose consumption before radicle protrusion. Although there were no changes in starch concentration during the germination of either the control or buried seeds, a different isoenzyme amylase pattern was observed. Catalase activity decreased and hydrogen peroxide levels were lower in exhumed seeds during germination. The changes in the protein and sucrose patterns were related to advances in the germinative process acquired during burial. Metabolic advantages were maintained systematically in all seed samples along the 2 years. The ecological significance of natural priming is discussed.

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“…This rapid urban growth has multiple consequences at different scales, including: 1) Reduction of the original vegetation cover area, substituted by urban areas or cultivated fields (Ezcurra et al 1999;Merlín-Uribe et al 2013). 2) Alteration of precipitation patterns, changes in groundwater levels and drying (Bojorquez Tapia et al 1998;Tortajada and Castelán 2003), and 3) Decrease in biodiversity (Rodríguez-Franco 2001;Ezcurra et al 2001;Narchi 2014). Currently, some lakes no longer exist, particularly the remnants of Lake Zumpango, Texcoco, and Chalco, surrounded by urban, peri-urban areas and, in the least of cases, cultivated fields, so their surroundings do not seem to be the appropriate habitats for O. fulgens.…”

Section: Discussionmentioning

confidence: 99%

Rediscovery of Oryzomys fulgens: implications for the taxonomy of Oryzomys

González-Ruiz,

Ramírez-Pulido,

Jiménez-Gutiérrez

et al. 2024

Therya

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The rodents belonging to the genus Oryzomys are among the most widely distributed groups inhabiting North America. Currently, 13 species with continental, peninsular, or insular distributions are known. However, this genus also faces significant conservation challenges, primarily due to climate change and other human-related activities. One such enigmatic species is Oryzomys fulgens. Its main challenge lies in the fact that it was originally described from an imprecise type locality, simply labeled as "Mexico." Fortunately, recent research has delimited its range to the Basin of México. Nonetheless, the lack of comparison between its holotype and other specimens of the genus in México has hindered the accurate assignment of its name to any known taxon, despite being one of the oldest names within the genus, O. fulgens has rarely been used since its original description. During our research, we collected two specimens of O. fulgens from Xochimilco, México City, a remnant wetland situated within the Basin of México, nestled within one of the largest and most urbanized cities globally. To properly assess its taxonomic status, we compared our specimens with the holotype of O. fulgens, as well as with other species from southern and western México. The considerable morphological differences we observed in O. fulgens, coupled with its distinct and unique habitat as the sole species of the genus occupying temperate regions at high elevations, lead us to propose that it is indeed a distinct species, separate from O. mexicanus and O. albiventer. Historically, its distribution was likely limited to the Basin of México. Today, O. fulgens faces serious conservation problems, mainly due to the restriction of its current distribution, as far as we know, confined to Xochimilco. Although the ancestral agricultural system known as "chinampas" might provide an ideal environment for sustaining populations of this species, it remains under significant pressure from various human activities, predators, and competition with invasive species like the black rat. Urgent conservation efforts are needed to safeguard the unique habitat of O. fulgens and protect this enigmatic species from further decline.

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Socioeconomic Change and Its Impact on Forest Resources in the Basin of Mexico

Cited by 8 publications

References 7 publications

Influence of solid waste and topography on urban floods: The case of Mexico City

Influence of solid waste and topography on urban floods: The case of Mexico City

Natural priming as an important metabolic event in the life history of Wigandia urens (Hydrophyllaceae) seeds

Rediscovery of Oryzomys fulgens: implications for the taxonomy of Oryzomys

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