Climatic niche shift of aquatic plant invaders between native and invasive ranges: a test using 10 species across different biomes on a global scale | Knowledge and Management of Aquatic Ecosystems

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Table 1

Number of occurrence localities, AUC values, and climatic niche overlap between native and invasive models for aquatic plant invaders (APIs). Native and invasive (the subscripts in this table) represent native and invasive models, respectively. Record represents the number of occurrence localities based on both native and invasive models, respectively. AUC represents the AUC values of MAXENT modeling based on the occurrence localities of native and invasive models, respectively. D_obs represents Schoener's D for APIs between native and invasive models and D_null represents Schoener's D outside of the 95% confidence limits for each API based on the null model. D_obs values smaller than D_null significantly support niche shift. VS NA and VS IN (the subscripts in this table) represent niche overlap between all models and the native models (or invasive models). The code of I was similar to D. Bold values represent significant climatic niche shift between native and invasive ranges based on the null model. SD, standard deviation.

Species	Record_Native	Record_Invasive	AUC_Native	AUC_Invasive	D_obs	D_null	I_obs	I_null	D_{VS NA}	D_{VS IN}	I_{VS NA}	I_{VS IN}
Alternanthera philoxeroides	58	199	0.969	0.967	0.600	0.609	0.841	0.840	0.675	0.874	0.899	0.985
Ceratophyllum demersum	572	156	0.958	0.933	0.363	0.823	0.709	0.975	0.796	0.532	0.972	0.831
Crassula helmsii	395	860	0.956	0.950	0.539	0.769	0.770	0.966	0.815	0.678	0.962	0.885
Elodea canadensis	287	935	0.969	0.944	0.495	0.728	0.789	0.948	0.694	0.748	0.929	0.941
Hydrilla verticillata	64	102	0.989	0.993	0.307	0.752	0.633	0.928	0.470	0.812	0.791	0.959
Ludwigia peruviana	356	64	0.980	0.979	0.423	0.734	0.698	0.933	0.899	0.479	0.982	0.766
Najas minor	266	106	0.986	0.992	0.151	0.689	0.425	0.893	0.455	0.565	0.773	0.843
Pistia stratiotes	107	162	0.986	0.969	0.487	0.769	0.785	0.951	0.647	0.789	0.896	0.963
Potamogeton crispus	367	316	0.972	0.970	0.437	0.854	0.720	0.977	0.598	0.797	0.844	0.965
Sagittaria platyphylla	81	107	0.989	0.985	0.324	0.727	0.651	0.894	0.628	0.601	0.882	0.880
Mean	255.3	300.7	0.975	0.968	0.413	0.745	0.702	0.931	0.668	0.688	0.893	0.902
SD	164.757	306.079	0.012	0.019	0.124	0.064	0.111	0.041	0.135	0.129	0.069	0.069

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