[Pictured: President Barack Obama signs the America Recovery and Reinvestment Act on Feb. 17, 2009, in Denver, Colorado.] 2007: Energy Independence and Security Act of 2007 Shawn Thew-Pool // Getty Images 2007: Energy Independence and Security Act of 2007 Energy legislation, energy prices, an...
productivity in the soil microbiome [35]. Furthermore, drought is thought to have a long-lasting impact on soil microbial communities due to shifts in vegetation to more drought-tolerant plant species, which drive significant changes in the composition of root-associated microbial communities [36]....
timing of molt and direction of migration to stopover or wintering grounds) may contribute to the evolution of and the maintenance of migratory divides, regions of overlap between distinct populations with divergent migratory strategies20,21, but data supporting this mechanism is limited. For example...
Variations of site-based mean δ15N of leaf N (δ15Nleaf), whole-plant N (δ15Nplant), PUN (δ15NPUN), soil NO3-(δ15Nsoil-NO3-), soil NH4+(δ15Nsoil-NH4+), and soil EON (δ15Nsoil-EON) with MAT are shown in panels (a)–(f), respectively. Mean and SD values were based ...