Latitudinal gradients of reproductive traits in Japanese woody plants

Werner Ulrich; Buntarou Kusumoto; Takayuki ShionoAkinori FujiYasuhiro Kubota

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Latitudinal gradients of reproductive traits in Japanese woody plants

机译：Latitudinal gradients of reproductive traits in Japanese woody plants

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Latitudinal gradients in the variability of plant trait expression are insufficiently studied. Here, we infer the expression and variability of major reproductive traits in Japanese angiosperm woody plants using geographical distributions of 773 woody plant species and 4682 grid cells at the 10 x 10 km2 spatial resolution. We focus on flower color, flower size, fruit size, fruit type, seed mass, and dispersal type and relate trait mean values and within cell variability to latitude, forest area and fragmentation, phylogenetic relatedness, and socioeconomic factors. To account for the correlation between variability and mean trait values, we use a recently developed model based on Taylor's power law (TPL). All studied reproductive traits exhibited strong although contrasting latitudinal gradients. Contrary to Gloger's rule, flowers tended to be darker at higher latitudes. Flower sizes increased and fruit and seed sizes decreased at higher latitudes. Color variability increased while variability in fruit size decreased toward higher latitudes. Higher human impact influenced fruit size positively and seed size negatively. We confirmed the usefulness of the TPL in the study of trait variability. We interpret the darker flower colors at higher latitudes as an adaptation to predominant bee pollination and thus as an effect of ecological filtering. Our study does not unequivocally corroborate the hypothesis that color variability within woody plant communities is governed by the intensity of ultraviolet radiation. We interpret the observed latitudinal trends toward higher variation in flower color and size in terms of increased numbers of generalist pollinators at higher latitudes.

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来源
《Ecological research》 |2023年第1期|188-199|共12页
作者
Werner Ulrich; Buntarou Kusumoto; Takayuki ShionoAkinori FujiYasuhiro Kubota;
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作者单位

Department of Ecology and Biogeography, Nicolaus Copernicus University, Torun, Poland;

Faculty of Agriculture, Kyushu University, Fukuoka, Japan;

Faculty of Science, University of the Ryukyus, Nishihara, JapanFaculty of Science, University of the Ryukyus, Nishihara, Japan,Marine and Terrestrial Field Ecology, Tropical Biosphere Research Center, University of the Ryukyus, Nishihara, Japan;

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原文格式 PDF
正文语种英语
中图分类普通生物学;
关键词
Gloger's rule; human impact; latitudinal gradient; plant reproduction; Taylor's power law;

Latitudinal gradients of reproductive traits in Japanese woody plants

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