Distribution pattern and mechanism of insect species diversity in Inner Mongolia

doi:10.17520/biods.2018144

Abstract

Abstract:

How species are distributed geographically and what drives these distributions remain core issues in macroecology and biogeography. Both regional and local scale factors such as temperature, precipitation, altitudinal range, habitat filtering, predation, competition and reciprocity affect the large-scale distribution pattern of insect species diversity. However, few studies have simultaneously discussed the effects of these multi-scale drivers on the geographical distribution of insect diversity. Using insect diversity data from 86 counties in Inner Mongolia Autonomous Region, we assessed the distribution patterns and main drivers of insect species diversity. We included mean annual temperature, mean annual precipitation, paleoclimate change, altitudinal range and plant diversity as predictors. Plant diversity and altitudinal range influenced insect diversity in Inner Mongolia while climatic factors had less influence. Our results show that interspecific relationships (food diversity) and habitat heterogeneity may play a crucial role in shaping distribution patterns of insect diversity in Inner Mongolia.

http://jtp.cnki.net/bilingual/detail/html/SWDY201807005

Key words: insect species diversity, habitat heterogeneity, interspecific interactions, climatic factor, altitudinal range, plant diversity

Yu Zhang, Gang Feng. Distribution pattern and mechanism of insect species diversity in Inner Mongolia[J]. Biodiv Sci, 2018, 26(7): 701-706.

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URL: https://www.biodiversity-science.net/EN/10.17520/biods.2018144

https://www.biodiversity-science.net/EN/Y2018/V26/I7/701

Figures/Tables 3

Fig. 1 Scatter plots of insect species diversity and the related variables. Anom MAP and Anom MAT are the change of MAP/MAT between LGM and contemporary time.

Table 1 Results of single-variable analysis by ordinary least squares (OLS) and simultaneous autoregressive (SAR) models

	coef_OLS	r²_OLS	coef_SAR	r²_SAR
年平均气温 Mean annual temperature (MAT)	-0.22	0.04^*	-0.24	0.08^**
年降水量 Mean annual precipitation (MAP)	-0.06	0	-0.05	0
古温度变化 Anom MAT	0.17	0.02	0.2	0.06^**
古降水变化 Anom MAP	-0.24	0.04^*	-0.23	0.07^*
植物多样性 Plant diversity	0.35	0.16^**	0.36	0.13^**
海拔变化 Altitudinal range	0.42	0.11^**	0.41	0.18^**

Fig. 2 Four combinations of variables most associated with insect species diversity obtained from the random forest model. Group 1 are Anom MAP and Plant diversity, Group 2 are Anom MAP, Altitudinal range and Plant diversity, Group 3 are MAT, Anom MAP, Altitudinal range and Plant diversity, Group 4 are MAP, Anom MAP, Altitudinal range and Plant diversity. Anom MAP is the change of MAP between LGM and contemporary time.

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