INTEGRAL PROJECTION MODELS
; CLIMATE-CHANGE
; GEOGRAPHIC RANGE
; COMPETITIVE INTERACTIONS
; WHITE MOUNTAINS
; SOIL-MOISTURE
; SPECIES RANGE
; COMMUNITY
; LIMITS
; RESPONSES
WOS学科分类:
Plant Sciences
WOS研究方向:
Plant Sciences
英文摘要:
Heterogeneous terrain in montane systems results in a decoupling of climatic gradients. Population dynamics across species' ranges in these heterogeneous landscapes are shaped by relationships between demographic rates and these interwoven climate gradients. Linking demography and climate variables across species' ranges refines our understanding of the underlying mechanisms of species' current and future ranges. We explored the importance of multiple microclimatic gradients in shaping individual demographic rates and population growth rates in 16 populations across the elevational distribution of an alpine plant (Ivesia lycopodioides var. scandularis). Using integral projection modeling, we ask how each rate varies across three microclimate gradients: accumulated degree-days, growing-season soil moisture, and days of snow cover. Range-wide variation in demographic rates was best explained by the combined influence of multiple microclimatic variables. Different pairs of demographic rates exhibited both similar and inverse responses to the same microclimatic gradient, and the microclimatic effects often varied with plant size. These responses resulted in range-wide projected population persistence, with no declining populations at either elevational range edge or at the extremes of the microclimate gradients. The complex relationships between topography, microclimate and demography suggest that populations across a species' range may have unique demographic pathways to stable population dynamics.
1.Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 USA 2.Univ Colorado, Dept Ecol & Evolutionary Biol, Boulder, CO 80309 USA 3.Univ Calif Berkeley, Jepson Herbarium, Berkeley, CA 94720 USA
Recommended Citation:
Oldfather, Meagan F.,Ackerly, David D.. Microclimate and demography interact to shape stable population dynamics across the range of an alpine plant[J]. NEW PHYTOLOGIST,2019-01-01,222(1):193-205