Journal Article Research Support, Non-U.S. Gov't Meta-Analysis Nitrates Organic Chemicals Paleogene Paleógeno Research Support, U.S. Gov't, Non-P.H.S. Soil abiotic and biotic constraints biodiversity conservation community assembly conservación de la biodiversidad declinación de los tipos de hábitat decline of habitat types disturbance and stress diversificación filogenética específica de la época epoch-specific phylogenetic diversification functional diversity functional trait inferencia paleoecológica leaf carbon to nitrogen leaf nitrogen content limitaciones bióticas y abióticas mineralization niche conservatism nitrogen cycling nutrient-use strategy paleoecological inference phylogenetic diversity