La macroecología en México: historia, avances y perspectivas

Landscape Ecology in Mexico: Evolution, Research, Education and Future (Selected Theoretical and Meta-Scientific Aspects)

Context:The impulse to write this contribution was the effort of co-authors to bring the European landscape ecologist closer to the development, research & didactic approaches and possible future development of landscape ecology in Mexico from the theoretical, metascientific and applied point of view.

Purpose: The purpose of the metascientific approach, in this case meta-landscape ecological approach, is to increase the degree of generalization of existing empirical-methodological, theoretical-application and didactic knowledge and results of landscape-ecological research, so that generally valid landscapeecological regularities and principles can be determined The aim was to acquire new generalizing and holistic qualities and perspectives in the field of landscape ecology in Mexico at this level.

Methods: The two-step methodical procedure was elaborated, using metascientifically oriented landscape ecological and ecological Mexican literature, complemented by our studies and personal experience.

Results: In this way, new knowledge, representing the added value and meaning of landscape ecologicalevolution, research, education and future development in Mexico was gained. It will serve also to Mexican landscap ecologists.

Conclusiones: Mexican landscape ecology, lying at the intersection of European and American landscape ecology, can be described as integrative, idiographic-nomothetic at the spatial level of the landscape in the contact zone of European and American research approaches and principles.

Spatial incongruence in the species richness and functional diversity of cricetid rodents

Biodiversity is multidimensional and different mechanisms can influence different dimensions. The spatial distribution of these dimensions can help in conservation decisions through the location of complementary areas with high diversity. We analyzed congruence in spatial patterns of species richness and functional diversity of cricetid rodents in the state of Oaxaca, southern Mexico, at different scales, and environmental variables related. Potential distribution models were produced for 49 species of cricetids in Maxent and superimposed to obtain potential communities in cells of 25, 50,100, 200 and 400 km2. We estimated species richness (SR) and functional diversity (SES.FD) eliminating the species richness effect through null models. The patterns and spatial congruence of species richness and functional diversity are described. The relationships between the environmental variables (elevation, temperature, precipitation, net primary productivity and potential evapotranspiration) and the SR and SES.FD were explored using Generalized Linear Models (GLMs) and Generalized Additive Models (GAMs). The highest species richness was found in mountainous ecosystems while the highest functional diversity was in tropical forests, revealing a spatial incongruence among these components of biodiversity (r = -0.14, p = 0.42; Pearson correlation). The locations of the cells of low congruence varied according to spatial resolution. In univariate models, elevation was the variable that best explained species richness (R2 = 0.77). No single variable explained the functional diversity; however, the models that included multiple environmental variables partially explained both the high and low functional diversity. The different patterns suggest that different historic, ecological and environmental processes could be responsible for the community structure of cricetid rodents in Oaxaca. These results indicate that one great challenge to be met to achieve more effective planning for biological conservation is to integrate knowledge regarding the spatial distribution of different dimensions of biodiversity.