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Seed plants are the most prosperous plant group on Earth and the most important producers
in terrestrial ecosystems.
The distribution of different groups of seed plants on land varies greatly, such as some species of the genus Senecio in the family Asteraceae (Senecio) have a distribution area of tens of millions of square kilometers, while some endemic species of Impatiens in the mountains of southwest China are limited to less than one square kilometer
.
Why is there such a huge variation in the distribution of seed plants? This is one of
the core questions in biogeographic research.
Seeds are the movable life history stage of plants, participating in the key ecological processes that restrict distribution, such as dispersal and colonization, and the relationship between the functional traits of seeds and plant distribution areas is worth in-depth discussion
.
Recently, the team of Li Debah and Gao Lianming of the Kunming Institute of Botany, Chinese Academy of Sciences, in cooperation with Professor He Fangliang of the University of Alberta, Canada, and Professor Kevin S.
Burgess of Columbus State University, USA, based on 122 families collected by the Southwest China Wildlife Germplasm Resource Bank Genus 1426 The subfunctional traits of planting species supplemented some of the seed functional traits data of the British Millennium Seed Bank, combined with the plant distribution information obtained from the public database and the phylogenetic tree relationship of angiosperms, and explored the relationship between the size of the distribution area of seed plants and the key functional traits and phylogeny of seeds with the help of least squares phylogenetic regression and variation
。 The results show that there is a significant phylogenetic signal in the distribution area size of seed plants.
After excluding phylogenetic signals, the smaller the seeds, the larger the plant distribution area; The variability of seed size has a certain positive effect on plant distribution, and the interaction between seed size and seed dispersal mode affects plant distribution
.
Overall, phylogeny, seed size and variability, and dispersal patterns together explained 46.
82% of the species distribution variation
.
This study provides a new case
for understanding how angiosperm seed functional traits and phylogeny affect plant distribution size.
The research results were published in Biogeosciences, an international journal at the intersection of life sciences and earth sciences, under the title of Seed traits and phylogeny explain plants' geographic distribution.
Chen Kai, a graduate doctoral student, is the first author of the paper, and researcher Gao Lianming and researcher Li Debao are the corresponding authors
of the paper.
The research was supported by the Chinese Academy of Sciences Category B Pilot Project (XDB31000000), the International Partnership Program of the Chinese Academy of Sciences (151853KYSB20190027), and the National Natural Science Foundation of China (32160078).
) with the support of the National Major Scientific Research Program (2014CB954100).
Link to the article
Fig.
1 Effects of
key functional traits of seeds on the size of seed plant distribution.
Fig.
2 Variability of
seed size, variability, dispersal mode and phylogeny on plant distribution size.
