生物多样性 ›› 2021, Vol. 29 ›› Issue (5): 0-0.DOI: 10.17520/biods.2020268

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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,任宗昕,徐鑫,王维嘉,刘杰,赵延会,王红   

  1. 中国科学院昆明植物研究所
  • 收稿日期:2020-07-03 修回日期:2020-08-24 出版日期:2021-05-20 发布日期:2020-09-20
  • 通讯作者: 王红

Predicting the spatial distribution of three Astragalus species and their pollinating bumblebees in China-Himalayas

Yuhan Shi,Zongxin Ren,Xin Xu,Weijia Wang,Jie Liu,Yanhui Zhao,Hong Wang   

  1. Kunming Institute of Botany, Chinese Academy of Sciences
  • Received:2020-07-03 Revised:2020-08-24 Online:2021-05-20 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的联系。预测未来气候变化对植物与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。通过对中国-喜马拉雅三种黄耆属(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,和来自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,结合物种可能出现的完全扩散、不扩散和仅熊蜂扩散三种迁移模式,利用MaxEnt模拟了三种黄耆属植物与两种传粉熊蜂(橘尾熊蜂Bombus friseanus和红束熊蜂B. rufofasciatus)在历史阶段和2100年两种温室气体浓度情景(ssp245和ssp585)下的适宜分布区变化。研究表明:三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,三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,三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,因而我们的研究可以用来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物种。

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: For plant species relying on animal pollination for reproduction, their spatial distribution is influenced by the geographical distribution of their pollinators. Predicting the impact of future climate change on the geographical distribution of plant and its pollinator has important significance for biodiversity conservation. In this study, we conducted a field investigation of three Astragalus species and their dominant pollinating bumblebees, and we collected 543 species distribution points of Astragalus (A. camptodontus, A. pullus and A. strictus) and Bombus and 13 environmental factors from the historical database. We used MaxEnt to simulate the suitable distribution change of three Astragalus species and two pollinating bumblebees (B. friseanus and B. rufofasciatus) at near current and 2100s two greenhouse gas concentrations scenarios (ssp245 and ssp585) combined with three possible migration situations, i.e. full dispersal, no dispersal and only Bombus dispersal. Our research shows the three Astragalus species are mainly pollinated by bumblebees. The main suitable distribution of Astragalus and Bombus is Sino-Himalaya. By 2100, their suitable distribution tend to expand toward the northwest, while the distribution areas in the Southeast will decrease. When the interaction was included in the models, potential range size of three Astragalus species is reduced by 15.83%-83.98%. Under the medium concentration of greenhouse gases scenarios (ssp245), the spatial match of three Astragalus species and their pollinating bumblebees will increase, but the spatial match of A. camptodontus, A. pullus and their dominated pollinators B. friseanus will decrease under the high concentration of greenhouse gases scenarios (ssp585). If species lacked full dispersal ability or only Bombus dispersal, the spatial match of A. strictus and its dominated pollinators B. rufofasciatus will decrease. Climate change and species dispersal ability may cause spatial mismatch between the Astragalus and 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. Given the importance that interaction with pollinators have on 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, environmental factors