Invasive Species Pressure

Measures the impact and threat posed by non-native species introduced into ecosystems where they do not naturally occur. These invasive species can outcompete, displace, or even eradicate native species, leading to significant disruptions in ecosystem function and biodiversity. The pressure from invasive species is a global concern as it affects all types of environments—terrestrial, freshwater, and marine—and can lead to irreversible ecological changes and economic losses.

Managing invasive species pressure involves a comprehensive strategy that includes prevention, early detection, rapid response, and control or eradication of established invasive species. Effective management requires international cooperation, stringent biosecurity measures, and public awareness campaigns to prevent introductions. Once invasive species are established, targeted removal programs, habitat restoration, and continuous monitoring are essential to mitigate their impact and restore native biodiversity.

The higher the score, the better the country ranks for this parameter.

The table is sorted from the highest score to the lowest:

Rank	Country	Score	Change
1	East Timor	100	+3
2	Congo	100	+1
3	Guinea	100	+3
4	Sierra Leone	100	+4
5	Togo	100	+4
6	Burkina Faso	100	-4
7	Gabon	100	-2
8	Benin	100	-7
9	Liberia	100	-2
10	Mali	99	+17
11	Djibouti	99	+6
12	Ghana	99	+10
13	Chad	99	+3
14	Guinea-Bissau	99	+9
15	Gambia	99	+6
16	Brunei	99	None
17	Angola	99	-4
18	Bolivia	99	-6
19	Mauritania	99	+9
20	Laos	99	+5
21	Senegal	99	+12
22	Guyana	99	+2
23	Niger	99	+8
24	Paraguay	99	+8
25	Vietnam	99	+11
26	Mozambique	99	+3
27	Cameroon	99	-12
28	Equatorial Guinea	99	-10
29	Venezuela	99	+6
30	Myanmar	99	None
31	Suriname	99	+3
32	Eritrea	99	-13
33	Ethiopia	99	-13
34	Burundi	99	-20
35	Belize	99	-24
36	Malawi	99	-10
37	Montenegro	98	+14
38	Cambodia	98	+2
39	Nicaragua	98	+14
40	Sudan	98	+20
41	Mongolia	98	+9
42	North Macedonia	98	+13
43	Central Af. Rep.	98	-2
44	Pakistan	98	+12
45	Solomon Islands	98	+14
46	Colombia	98	-4
47	Ecuador	98	-3
48	Uganda	98	+14
49	Guatemala	98	-4
50	Afghanistan	98	-13
51	Brazil	98	-12
52	Honduras	98	-6
53	Rwanda	98	+5
54	Kiribati	98	-6
55	Nigeria	98	-1
56	Costa Rica	98	-13
57	Maldives	98	-8
58	Armenia	98	-20
59	Tajikistan	98	+2
60	Nepal	98	-8
61	Ivory Coast	98	-4
62	Peru	98	-5
63	Tanzania	97	+11
64	Kenya	97	+4
65	Thailand	97	+10
66	Marshall Islands	97	+5
67	DR Congo	97	-2
68	Namibia	97	+5
69	Bosnia and Herz.	97	-6
70	Lesotho	97	-1
71	Botswana	97	-7
72	Malaysia	97	-2
73	Jordan	97	-6
74	Zambia	97	+2
75	Eswatini	97	-9
76	Bangladesh	97	None
77	Micronesia	97	-5
78	Panama	96	+2
79	Iraq	96	None
80	Uruguay	96	+4
81	El Salvador	96	-4
82	Indonesia	96	-4
83	Turkmenistan	96	None
84	Samoa	96	-3
85	Tonga	96	-3
86	Dominica	95	+1
87	Moldova	95	+1
88	Vanuatu	95	+3
89	Azerbaijan	95	-4
90	Sri Lanka	95	None
91	South Korea	95	-2
92	Comoros	95	-6
93	Argentina	94	-1
94	Georgia	94	-1
95	India	94	-1
96	Luxembourg	93	+2
97	Algeria	93	-1
98	Grenada	93	-1
99	Saudi Arabia	93	None
100	Albania	93	-5
101	Morocco	92	+2
102	Saint Lucia	92	+2
103	Iran	92	-2
104	St. Vincent and the Grenadines	92	+1
105	Madagascar	92	-3
106	Seychelles	92	None
107	Egypt	91	+2
108	Oman	91	+3
109	Tunisia	91	+6
110	Slovenia	91	+4
111	Serbia	91	+2
112	Qatar	91	None
113	Croatia	91	-5
114	Haiti	91	-4
115	Uzbekistan	91	+1
116	Bulgaria	91	-9
117	France	90	+45
118	Mexico	90	-1
119	Trinidad and Tobago	89	+4
120	Belarus	89	-1
121	Cape Verde	89	-1
122	Kyrgyztan	89	None
123	Kazakhstan	89	-2
124	Antigua and Barbuda	89	-6
125	Philippines	88	+1
126	Lebanon	88	-1
127	Zimbabwe	88	None
128	Fiji	88	-4
129	Bahamas	87	-1
130	Bahrain	87	-1
131	Bhutan	87	-1
132	Turkey	87	-1
133	Finland	87	+16
134	Netherlands	52	+32
135	Israel	85	+16
136	Greece	85	-4
137	China	85	-37
138	Kuwait	85	-5
139	Dominican Republic	84	-5
140	Malta	84	-5
141	Singapore	84	-5
142	Mauritius	83	-4
143	Jamaica	83	-6
144	Taiwan	83	-5
145	Russia	82	-4
146	Barbados	82	-6
147	Australia	82	+9
148	Denmark	82	+12
149	Switzerland	81	-6
150	New Zealand	81	+24
151	South Africa	81	-9
152	Cuba	80	-8
153	United States	80	+20
154	Hungary	80	-9
155	United Kingdom	78	+23
156	United Arab Emirates	78	-9
157	Sao Tome and Principe	78	-11
158	Romania	77	-10
159	Chile	75	-9
160	Japan	73	-8
161	Slovakia	73	-9
162	Italy	72	-8
163	Ukraine	71	-8
164	Latvia	70	-7
165	Lithuania	69	-7
166	Cyprus	67	-7
167	Estonia	65	-6
168	Austria	56	-5
169	Poland	55	-3
170	Canada	55	-6
171	Spain	52	-4
172	Czech republic	51	-4
173	Iceland	46	-4
174	Sweden	43	-4
175	Portugal	41	-4
176	Ireland	40	-4
177	Belgium	22	-2
178	Germany	20	-2
179	Norway	20	-2

Source and Calculation

Lists of invasive species per country are sourced from the Global Alien Species First Record Database. Shapefiles of terrestrial and marine species’ extent of occurrence are sourced from the IUCN Red List, BirdLife International and the Global Assessment of Reptile Distributions Initiative, and used to create country lists of native species. The proportion of a country’s non-native species, weighted by the number of native species of the same group (e.g., mammals, birds) is then calculated. A minimum score is given to a country that has non-native species make up 25% or more of its biodiversity.

*Different sources offer varying data, as datasets may be subject to changes due to recent updates and revisions.

Regions

Habitat

Invasive Species Pressure

Source and Calculation

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Invasive Species Pressure

Source and Calculation

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