Temperature-associated population diversity in salmon confers benefits to mobile consumers

摘要: Habitat heterogeneity can generate intraspecific diversity through local adaptation of populations. While it is becoming increasingly clear that population increase stability in species abundance, less known about how benefit consumers integrate across their prey. Here we demonstrate cascading effects thermal on trout-salmon interactions streams where rainbow trout rely heavily the seasonal availability anadromous salmon eggs. Water temperature an Alaskan stream varied spatially from 5 degrees C to 17.5 C, and spawning sockeye showed differentiation associated with this heterogeneity. Individuals spawned early cool regions km long were genetically differentiated those warmer later season. Sockeye generates a pulsed resource subsidy supports majority growth stream-dwelling trout. The spatial temporal structuring spawn timing our focal extended duration compared thermally homogeneous single salmon. Further, adopted movement strategies exploited multiple pulses egg subsidies heterogeneous stream. Fish moved track pulse grew at rates 2.5 times higher than remained stationary or reference Our results habitat have important dominant species, turn, influence value prey upon them. Therefore, homogenization may farther-reaching ecological previously considered.