生物多样性 ›› 2021, Vol. 29 ›› Issue (6): 759-769.DOI: 10.17520/biods.2020268

• 动物多样性 • 上一篇    下一篇

中国-喜马拉雅三种黄耆属植物与其传粉熊蜂的空间分布预测

施雨含1,2, 任宗昕1, 王维嘉1,2, 徐鑫1,2, 刘杰1, 赵延会1, 王红1,*()   

  1. 1.中国科学院昆明植物研究所东亚植物多样性与生物地理学重点实验室, 昆明 650201
    2.中国科学院大学, 北京 100049
  • 收稿日期:2020-07-03 接受日期:2020-08-26 出版日期:2021-06-20 发布日期:2020-09-20
  • 通讯作者: 王红
  • 作者简介:* E-mail: wanghong@mail.kib.ac.cn
  • 基金资助:
    中国科学院先导专项B项目(XDB31000000);国家自然科学基金-云南省联合重点基金(U1502261)

Predicting the spatial distribution of three Astragalusspecies and their pollinating bumblebees in the Sino-Himalayas

Yuhan Shi1,2, Zongxin Ren1, Weijia Wang1,2, Xin Xu1,2, Jie Liu1, Yanhui Zhao1, Hong Wang1,*()   

  1. 1 CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201
    2 University of Chinese Academy of Sciences, Beijing 100049
  • Received:2020-07-03 Accepted:2020-08-26 Online:2021-06-20 Published:2020-09-20
  • Contact: Hong Wang

摘要:

依赖于动物传粉获得繁殖成功的植物的分布与其传粉动物的地理分布有着密切联系。预测未来气候变化对植物及其传粉动物地理分布的影响对生物多样性保护具有重要意义。本文通过对中国-喜马拉雅3种黄耆属(Astragalus)植物, 即弯齿黄耆(A. camptodontus)、黑毛黄耆(A. pullus)和笔直黄耆(A. strictus), 及其传粉熊蜂(Bombus)的野外调查, 以及收集来源于数据库的黄耆和熊蜂的543个物种分布点和13个环境因子数据, 结合物种可能出现的完全扩散、不扩散和仅熊蜂扩散3种迁移模式, 利用MaxEnt模型模拟了3种黄耆属植物与2种传粉熊蜂即橘尾熊蜂(Bombus friseanus)和红束熊蜂(B. rufofasciatus)在历史阶段(1970-2000年)和2100年两种温室气体浓度情景(ssp245和ssp585)下的适宜分布区变化。结果表明: 3种黄耆属植物均主要依赖于熊蜂传粉, 黄耆与其传粉熊蜂的主要适宜分布区为中国-喜马拉雅地区, 到2100年它们的分布区呈现向西北方向扩张的趋势, 而在东南部的分布区减少。当模型中考虑与传粉熊蜂的互作后, 3种黄耆属植物的潜在地理分布范围减少了15.83%-83.98%。在温室气体中低浓度情景(ssp245)下, 3种黄耆属植物与其传粉熊蜂的空间匹配增加, 而在高浓度情景(ssp585)下弯齿黄耆、黑毛黄耆与橘尾熊蜂的空间匹配降低; 如果物种不扩散或仅熊蜂扩散, 笔直黄耆与红束熊蜂的空间匹配降低。气候变化和物种的扩散能力可能引起黄耆与其传粉熊蜂出现空间不匹配。同时, 模型预测显示影响黄耆和熊蜂分布的环境因子不同, 但海拔是最主要的环境因子。由于与传粉者的相互作用对许多植物物种的生命周期具有重要意义, 因而本研究可以更好地理解气候变化对植物与其传粉者空间分布的潜在影响, 特别是对那些地理范围受限制的植物。

关键词: 黄耆属, 传粉熊蜂, 空间分布, 气候变化, 最大熵模型, 环境因子

Abstract

Aims: The spatial distribution for plant species that rely on animal pollination for reproduction is influenced by the geographical distribution of their pollinators. Predicting the impact that future climate change will have on the geographical distribution of plants and their pollinators is significantly important for the conservation of biodiversity.

Methods: In this study, we conducted a field investigation to map out the distribution for three Astragalus species (A. camptodontus, A. pullus, andA. strictus) and their dominant pollinating bumblebees (Bombus). We collected 543 species distribution points for Astragalusand Bombusas well as 13 environmental factors from online database. Using the MaxEnt, we simulated suitable distribution changes for the three Astragalus species and two species of bumblebees (B. friseanusandB. rufofasciatus) under two climate change scenarios for 2100 (ssp245 and ssp585). We also combined with three possible migration situations into the models, i.e. full dispersal, no dispersal and only Bombus dispersal.

Results: We found that three Astragalusspecies are mainly pollinated by bumblebees and the most suitable distribution for Astragalus and Bombusis the Sino-Himalayas. It is predicted that by 2100, their suitable distribution will expand northwest, while distribution areas in the southeast will decrease. When the plant-pollinator interaction was included in the models, potential range size of the three Astragalusspecies was reduced by 15.83%-83.98%. Under low-emissions scenario (ssp245), the spatial match of three Astragalus species and their pollinating bumblebees is predicted to increase. However, under a high-emissions scenario (ssp585) the spatial match of A. camptodontus, A. pullusand their dominated pollinators B. friseanusis predicted to decrease. If species lack full dispersal ability or only Bombus disperse, the spatial match of A. strictusand its dominated pollinators B. rufofasciatusis predicted to decrease. Climate change and species dispersal ability may cause spatial mismatch between the Astragalusand their pollinating bumblebees. Our simulation shows that the environmental factors affecting the distribution of Astragalus and Bombus are different, but elevation is the most important factor.

Conclusion: Given the importance of pollinators for the life cycle of many plant species, our study could be used to better understand the potential effects of climate change on the spatial distribution of plants and their pollinators, particularly on species that with limited geographical range.

Key words: Astragalus, pollinating bumblebees, spatial distribution, climate change, MaxEnt model, environmental factors