Potential distribution of Impatiens davidii and its pollinator in China

doi:10.17521/cjpe.2021.0108

Abstract

Abstract:

Aims Impatiens davidii, a rare ornamental flower endemic to China, had a small wild population and depended on pollination of Bombus trifasciatus. As I. davidii has a specialized pollination system, pollination resources were one of the important factors limiting its population diffusion.

Methods In this study, the maximum entropy (MaxEnt) model was used to simulate the potential distribution area of the two species based on 63 distribution records of I. davidii, 54 distribution records of B. trifasciatus, and 19 climatic factors. The potential distribution of the two species under three climate representative concentration pathway scenarios RCP2.6, RCP4.5, and RCP8.5 were predicted for the future (2050s, 2070s).

Important findings The results showed that the main environmental factor affecting the distribution of I. davidii was precipitation of warmest quarter. Under the current climate conditions, the range overlap, niche overlap, and niche breadth of two species were higher. Approximately 99.09% of the suitable areas of I. davidiiwas overlapped with B. trifasciatus, which ensured the pollination resources to a large extent. Under the three future climate scenarios, the distribution area of I. davidii will expand to northeast and north China, and the suitable habitat area will increase by 66 000-221 900 km². The suitable habitat area of B. trifasciatus moved northward slightly, and increased by 44 800-155 000 km². The proportion of suitable habitat areas of I. davidii overlapped with B. trifasciatus decreased by 1.40%-9.00%, indicating that the suitable area of I. davidii might be affected by climate change and lack of pollination resources in the future.

Key words: Impatiens davidii, Bombus trifasciatus, climate change, MaxEnt model, pollination

SU Qi-Tao, DU Zhi-Xuan, ZHOU Bing, LIAO Yong-Hui, WANG Cheng-Cheng, XIAO Yi-An. Potential distribution of Impatiens davidii and its pollinator in China[J]. Chin J Plant Ecol, 2022, 46(7): 785-796.

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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2021.0108

https://www.plant-ecology.com/EN/Y2022/V46/I7/785

Figures/Tables 13

References 57

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变量 Variable	描述 Description	单位 Unit
Bio1	年平均气温 Mean annual air temperature	℃ × 10
Bio2	平均气温日较差 Mean diurnal range (mean of monthly (maximum temperature - minimum temperature))	℃ × 10
Bio3	等温性 Isothermality	-
Bio4	气温季节性变化标准差 Variation of temperature seasonlity	-
Bio5	最暖月最高气温 Maximum temperature of warmest month	℃ × 10
Bio6	最冷月最低气温 Minimum temperature of coldest month	℃ × 10
Bio7	温度年较差 Temperature annual range	℃ × 10
Bio8	最湿季度平均气温 Mean temperature of wettest quarter	℃ × 10
Bio9	最干季度平均气温 Mean temperature of driest quarter	℃ × 10
Bio10	最暖季度平均气温 Mean temperature of warmest quarter	℃ × 10
Bio11	最冷季度平均气温 Mean temperature of coldest quarter	℃ × 10
Bio12	年降水量 Mean annual precipitation	mm
Bio13	最湿月降水量 Precipitation of wettest month	mm
Bio14	最干月降水量 Precipitation of the driest month	mm
Bio15	降水量季节性变化标准差 Variation of precipitation seasonlity	-
Bio16	最湿季度降水量 Precipitation of wettest quarter	mm
Bio17	最干季度降水量 Precipitation of driest quarter	mm
Bio18	最暖季度降水量 Precipitation of warmest quarter	mm
Bio19	最冷季度降水量 Precipitation of coldest quarter	mm

变量 Variable	描述 Description	单位 Unit
Bio1	年平均气温 Mean annual air temperature	℃ × 10
Bio2	平均气温日较差 Mean diurnal range (mean of monthly (maximum temperature - minimum temperature))	℃ × 10
Bio3	等温性 Isothermality	-
Bio4	气温季节性变化标准差 Variation of temperature seasonlity	-
Bio5	最暖月最高气温 Maximum temperature of warmest month	℃ × 10
Bio6	最冷月最低气温 Minimum temperature of coldest month	℃ × 10
Bio7	温度年较差 Temperature annual range	℃ × 10
Bio8	最湿季度平均气温 Mean temperature of wettest quarter	℃ × 10
Bio9	最干季度平均气温 Mean temperature of driest quarter	℃ × 10
Bio10	最暖季度平均气温 Mean temperature of warmest quarter	℃ × 10
Bio11	最冷季度平均气温 Mean temperature of coldest quarter	℃ × 10
Bio12	年降水量 Mean annual precipitation	mm
Bio13	最湿月降水量 Precipitation of wettest month	mm
Bio14	最干月降水量 Precipitation of the driest month	mm
Bio15	降水量季节性变化标准差 Variation of precipitation seasonlity	-
Bio16	最湿季度降水量 Precipitation of wettest quarter	mm
Bio17	最干季度降水量 Precipitation of driest quarter	mm
Bio18	最暖季度降水量 Precipitation of warmest quarter	mm
Bio19	最冷季度降水量 Precipitation of coldest quarter	mm

环境变量 Variable	描述 Description	贡献率 Percent contribution (%)
Bio18	最暖季度降水量 Precipitation of warmest quarter	51.5
Bio4	气温季节性变化标准差 Variation of temperature seasonlity	23.4
Bio15	降水量季节性变化标准差 Variation of precipitation seasonlity	8.0
Bio13	最湿月降水量 Precipitation of wettest month	6.4
Bio6	最冷月最低气温 Minimum temperature of coldest month	6.1
Bio14	最干月降水量 Precipitation of driest month	3.4

环境变量 Variable	描述 Description	贡献率 Percent contribution (%)
Bio18	最暖季度降水量 Precipitation of warmest quarter	51.5
Bio4	气温季节性变化标准差 Variation of temperature seasonlity	23.4
Bio15	降水量季节性变化标准差 Variation of precipitation seasonlity	8.0
Bio13	最湿月降水量 Precipitation of wettest month	6.4
Bio6	最冷月最低气温 Minimum temperature of coldest month	6.1
Bio14	最干月降水量 Precipitation of driest month	3.4

	物种 Species	当前 Current	RCP2.6		RCP4.5		RCP8.5
	物种 Species	当前 Current	2050s	2070s	2050s	2070s	2050s	2070s
非适生区 Unsuitable area	A	731.36	716.28	723.51	713.52	711.12	704.28	705.45
非适生区 Unsuitable area	B	717.03	712.54	710.85	710.43	711.38	710.74	701.52
低度适生区 Marginal area	A	82.56	95.42	89.16	92.61	97.31	100.85	104.75
低度适生区 Marginal area	B	69.67	80.78	82.67	88.63	83.26	95.45	98.96
中度适生区 Suitable area	A	68.67	67.78	62.71	67.00	66.81	71.73	75.91
中度适生区 Suitable area	B	87.82	93.06	89.99	88.18	89.91	91.00	102.05
高度适生区 Optimal area	A	81.25	84.37	88.46	90.72	88.60	86.99	77.75
高度适生区 Optimal area	B	89.33	77.47	80.33	76.60	79.30	66.67	61.32