DOI: 10.5061/dryad.prr4xgxmz
title: Data from: Potential geographic distributions of endangered Opisthopappus Shih in response to environmental changes

description: Environmental changes could dramatically influence the distribution area
 and niche of organisms. Taihang Mountains contain numerous endemic
 species, regarded as a center of distribution and diversity for many plant
 genera. It is necessary that having more comprehensive studies of test
 climate effects on species in this area. Opisthopappus (containing two
 species Opisthopappus taihangensis and Opisthopappus longilobus) is an
 endangered and endemic genus in the Taihang Mountains. Predicting the
 suitable potential distribution, exploring the niche difference between
 two species and determining the important environmental factors are very
 critical for the sustainable utilization and scientific conservation. In
 this study, the distribution areas of both two species decreased
 drastically from the LIG to LGM period. Main refugia might have been in
 the centre of the Taihang Mountains. Compared LGM, the distribution ranges
 expanded in the Mid-Holocene period whether O. longilobus or O.
 taihangensis, and that generally similar to the present distribution areas
 of two species. From 2050 to 2070, the predicted distribution area greatly
 increased for both two species. Moreover, O. longilobus migrated toward
 south and east, while O. taihangensis moved toward west. Among all 37
 environmental variables, fourteen variables (bio2, bio3, bio4, bio8,
 bio11, bio13, bio15, elev, T_CaCO3, T_GRAVEL, T_OC, T_SAND, T_SILT, T_TEB)
 were the most important factors influencing on the distribution of
 Opisthopappus. O. taihangensis and O. longilobus presented a significant
 niche differentiation, and this change occurred gradually with the passage
 of time. These would provide some clues for the management and
 conservation for O. taihangensis and O. longilobus.
description: The environmental factors were extracted with ARCGIS
 software.
description: GENERAL INFORMATION Date of data collection
 (2020-10) :  Geographic location of data collection (
 latitude 34°N-38°N and longitude 111°E-115°E of Taihang Mountains in
 China)  SHARING/ACCESS INFORMATION
 The data do not contain sensitive information, and do not have
 licensing conflicts with CC0. DATA & FILE
 OVERVIEW 1. File List:  S_Table_2_Extract_variable.csv
 The environmental factors were extracted with ARCGIS software<br>
 fig.2.tif HD Figure<br> fig.1.tif HD Figure<br> fig.3C.tif HD
 Figure<br> fig.3A.tif HD Figure<br> fig.3B.tif HD
 Figure<br> fig.4.tif HD Figure<br> fig.5.tif HD
 Figure METHODOLOGICAL INFORMATION
 Methods for processing the data:  The environmental factors were
 extracted with ARCGIS 10.7 software. DATA-SPECIFIC
 INFORMATION FOR: [S_Table_2_Extract_variable.csv] 1.
 Number of variables: 41 2. Number of rows: 44
 3. Variable List:  From left to right, each
 column of the CSV file contains the species name, latitude, longitude,
 sampling point name, and Environmental Extend Variables.
 OBJECTID= species name lat= latitude
 long= longitude location= sampling point
 name T_GRAVEL=Topsoil Gravel
 Content T_SAND=Topsoil Sand
 Fraction T_SILT=Topsoil Silt
 Fraction T_CLAY=Topsoil Clay
 Fraction T_USDA_TEX=Topsoil USDA Texture
 Classification T_REF_BULK=Topsoil Reference Bulk
 Density T_OC=Topsoil Organic
 Carbon T_PH_H2O=Topsoil pH
 (H2O) T_CEC_CLAY=Topsoil CEC
 (clay) T_CEC_SOIL=Topsoil CEC
 (soil) T_BS=Topsoil Base
 Saturation T_TEB=Topsoil TEB T_CACO3=Topsoil Calcium
 Carbonate T_ESP=Topsoil Sodicity
 (ESP) T_ECE=Topsoil Salinity
 (Elco) T_TEXTURE=
 Topsoil Texture AWC_CLASS= Available water
 content Range elev= elevation DRAINAGE= Drainage
 class REF_DEPTH=
 Reference Soil Depth ADD_PROP= Other properties
 (gelic, vertic, petric) T_CASO4=Topsoil Gypsum
 BIO1 = Annual Mean
 Temperature BIO2
 = Mean Diurnal Range (Mean of monthly (max temp - min temp))
 BIO3 = Isothermality
 (BIO2/BIO7) (* 100) BIO4 = Temperature Seasonality
 (standard deviation *100) BIO5 = Max Temperature of Warmest
 Month BIO6 = Min
 Temperature of Coldest Month BIO7 = Temperature Annual Range
 (BIO5-BIO6) BIO8
 = Mean Temperature of Wettest Quarter BIO9 = Mean Temperature of Driest
 Quarter BIO10 =
 Mean Temperature of Warmest Quarter BIO11 = Mean Temperature of
 Coldest Quarter BIO12 = Annual
 Precipitation BIO13 = Precipitation of Wettest
 Month BIO14 =
 Precipitation of Driest Month BIO15 = Precipitation Seasonality
 (Coefficient of Variation) BIO16 = Precipitation of Wettest
 Quarter BIO17 =
 Precipitation of Driest Quarter BIO18 = Precipitation of Warmest
 Quarter BIO19 =
 Precipitation of Coldest Quarter