• Publications
  • Influence
Habitat-specific responses in the flowering phenology and seed set of alpine plants to climate variation: implications for global-change impacts
The results suggest that the effects of climate change on biological interaction may vary depending on the specific habitat in the alpine ecosystem in which diverse snowmelt patterns create complicated seasonality for plants within a very localized area. Expand
Kinship between parents reduces offspring fitness in a natural population of Rhododendron brachycarpum.
  • A. Hirao
  • Biology, Medicine
  • Annals of botany
  • 1 April 2010
The level of inbreeding between individuals determines offspring fitness in R. brachycarpum, especially during seed maturation, and genetic relatedness between parents caused inbreeding depression in their progeny. Expand
Seasonal changes in pollinator activity influence pollen dispersal and seed production of the alpine shrub Rhododendron aureum (Ericaceae)
R. aureum shows contrasting patterns of pollen movement and seed production between early and late season: in early season, seed production can be high but genetically less diverse and, during late season, be reduced, possibly due to higher inbreeding and inbreeding depression, but have greater genetic diversity. Expand
The effect of segregation of flowering time on fine-scale spatial genetic structure in an alpine-snowbed herb Primula cuneifolia
Flowering segregation caused by snowmelt timing is a critical factor for reinforcing the fine-scale SGS in this species, indicating substantial effect of restriction in gene flow due to phenological heterogeneity. Expand
Landscape genetics of alpine-snowbed plants: comparisons along geographic and snowmelt gradients
The genetic structure of three snowbed-herb species was analyzed using allozymes across nine populations arranged as a matrix of threeSnowmelt gradients × three geographic locations within 3 km in the Taisetsu Mountains, northern Japan to produce genetic clines at microgeographic scale. Expand
Adaptive significance of self-fertilization in a hermaphroditic perennial, Trillium camschatcense (Melanthiaceae).
Two possible scenarios for the evolution of self-fertilization in T. camschatcense are proposed - self-compatible, SC; or self-incompatible, SI - which are based on theoretical studies suggesting that selfing is advantageous over outcrossing and assurance of seed production under pollen-limited circumstances. Expand
Morphological and genetic variations of Potentilla matsumurae (Rosaceae) between fellfield and snowbed populations.
Investigating the variation in morphological traits and enzyme loci between fellfield and snowbed populations of Potentilla matsumurae, a common alpine herb, suggests that variation in snowmelt regimes could be a driving force creating local adaptation and genetic differentiation of alpine plant populations. Expand
Changes in pollinator fauna affect altitudinal variation of floral size in a bumblebee-pollinated herb
Results strongly suggest that C. punctata floral size is under pollinator-mediated selection and that a geographic mosaic of locally adapted C.unctata exists at fine spatial scale. Expand
Pollination Efficiency of Bumblebee Queens and Workers in the Alpine Shrub Rhododendron aureum
Pollination efficiency, or the type of pollen limitation, shifts during the flowering season, reflecting the seasonal life cycle of bumblebees in the ecosystem. Expand
Genetic structure of a hybrid zone between two violets, Viola rossii Hemsl. and V. bissetii Maxim.: dominance of F1 individuals in a narrow contact range
The genetic composition of a hybrid zone can provide insight into the evolution of diversification in plants. We carried out morphological and amplified fragment length polymorphism analyses toExpand