INTRODUCCIÓNBeaucarnea recurvata Lemaire (1861) (monja o pata de elefante) de la familia Nolinaceae, es una especie de importancia ornamental, catalogada como amenazada y protegida por el Estado Mexicano (NOM-059-SEMARNAT), debido a que las semillas, individuos juveniles y adultos, se comercializan ilegalmente. Habita en la selva baja caducifolia, considerada zona de refugio de biodiversidad, hábitat que presenta un acelerado cambio en el uso del suelo por la ampliación de la frontera agrícola, pecuaria y urbana.Con base en estudios previos sobre la dinámica de la especie se ha diseñado una estrategia de su producFigura 1. Floración masiva de la monja e individuo reproductivo.
ACE, 15 (44) CC BY-ND 3.0 ES | UPC Barcelona, España | Intervención y transformación de áreas naturales, en el contexto nanocuenca, como espacios públicos en la ciudad de Xalapa-México.
The main goal of this study is to perform review of road ecology issue in Mexico. More specifically we addressed: 1) a general overview of road construction from pre-Colonial times to the present; 2) a description of the historical background context for understanding modern Mexico´s highway system; 3) a review of the main results of the road ecology studies in Mexico and 4) the Mexican policy on mitigation actions. Finally, we discuss the key points of future research and road policies. There is already some research, mainly in road mortality, which gives us a glimpse of the impact of roads on Mexican wildlife. Mexico has wide diversity of habitats and ecosystems. So, to gain knowledge on the impact of roads on wildlife so that efficient corrective and preventive actions can be planned much more study is required. Unfortunately, most of the studies carried out in Latin America, and specifically in Mexico, were done only over Environmental Impact studies for large scale infrastructure projects. There is still a long way to go in Mexico for roadways to become environmentally friendly, but little by little the issue is gaining importance and hopefully more and more academics, policy makers and people in general will become interested and get involved, so that this goal can be achieved.
Global phenomena such as climate change threaten the resilience of agroecosystems and therefore food security. Thus, the objective of this paper was to analyze the cumulative nature and outstanding advances in the knowledge of the resilience of agroecosystems as a basis for the development of new trends in the subject. A literature review was conducted using the Web of Science database, considering criteria such as date of publication, disciplines and scientific journals. The search covers the period from 1993 to 2020. One hundred eighty-eight publications were identified, with 2018 and 2019 being the years with the highest number of articles published. The research areas with the most publications on resilience are ecology (71), agriculture (52) and environmental sciences (44). Regarding the connectivity based on the value of intermediate centrality, the areas of greatest interrelationship are mainly: agriculture (0.45), science and technology (0.28), environmental sciences (0.2) and ecology (0.12). In the dynamics and study of resilience, the adaptability of the agroecosystem stands out. The conceptual model of resilience analyzed facilitates its study and is composed of: precariousness, latitude, resistance and panarchy. Therefore, the indicators for quantifying resilience in agroecosystems are heterogeneous and multidimensional. It is concluded that resilience has been conceptually studied as an emerging property from the agroecological approach, recently from the socioecological systems approach, where adaptability and interdiscipline are highlighted as a means to solve complex problems.
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