ISI 2010 Impact Factors

The new ISI® Journal Citation Report (JCR®) impact factors for 2010 are out. Of the two big ones, Nature risen to 36.101 in 2010 from 34.480 in 2009; Science is now listed at 31.364, rising from 29.747 in 2009.

For the field of Ecology and Biodiversity conservation, the 40 highest ranked journals are listed below. The most obvious changed is that the two top journals, TREE and Ecology Letters have gained over-proportionally, with Ecology Letters having overtaken TREE this year through a leap from an IF of 10 to 15 approximately. I’m not sure if there is any particular reason for this strong increase of cites at the top; it may be that the field is concentrating somewhat more on the “big” instead of more specialized questions, and the big journals are profiting from that over-proportionally, but it may also just be due to changes in citation psychology or search behavior, or simply due to chance. Conservation letters is listed for the first time, with an IF of 4.7. Of the other journals, it seems that particularly Global Change Biology, Ecology and Society, but also the journals of the British Ecological Society such as the Journal of Ecology and the Journal of Applied Ecology have done quite well.

Rank	Journal	Articles	IF		5-years IF
		2010	2010	2009	2010
1	ECOL LETT	81	15.253	10.318	14.261
2	TRENDS ECOL EVOL	75	14.448	11.564	17.735
3	ANNU REV ECOL EVOL S	18	10.698	8.190	17.007
4	FRONT ECOL ENVIRON	55	8.820	6.922	7.931
5	MOL ECOL	414	6.457	5.960	6.633
6	GLOBAL CHANGE BIOL	262	6.346	5.561	7.814
7	ISME J	149	6.153	6.397	6.813
8	ECOL MONOGR	29	5.938	4.862	8.827
9	EVOLUTION	275	5.659	5.429	6.041
10	GLOBAL ECOL BIOGEOGR	79	5.273	5.913	6.330
11	J ECOL	138	5.260	4.690	5.685
12	ECOLOGY	357	5.073	4.411	6.218
13	P ROY SOC B-BIOL SCI	452	5.064	4.857	5.442
14	J APPL ECOL	143	4.970	4.197	5.715
15	CONSERV BIOL	171	4.894	4.666	5.963
16	WILDLIFE MONOGR	1	4.800	1.500	5.438
17	AM NAT	171	4.736	4.796	5.385
18	CONSERV LETT	51	4.694		4.694
19	FUNCT ECOL	148	4.645	4.546	4.742
20	HEREDITY	118	4.569	4.122	4.573
21	PERSPECT PLANT ECOL	28	4.488	4.684	5.420
22	J ANIM ECOL	135	4.457	3.714	4.782
23	ECOGRAPHY	118	4.417	4.385	5.325
24	ECOL APPL	177	4.276	3.672	5.067
25	J BIOGEOGR	180	4.273	4.087	4.716
26	DIVERS DISTRIB	86	4.248	4.224	4.550
27	ECOSYSTEMS	93	3.679	3.586	4.735
28	J EVOLUTION BIOL	264	3.656	3.816	4.080
29	BIOL LETTERS	216	3.651	3.521	3.821
30	BIOGEOSCIENCES	263	3.587	3.246	4.064
31	OECOLOGIA	307	3.517	3.129	4.116
32	BIOL CONSERV	315	3.498	3.167	4.042
33	BIOL INVASIONS	341	3.474	3.074	3.749
34	OIKOS	222	3.393	3.147	3.920
35	ECOL SOC	129	3.310	1.735	4.644
36	LANDSCAPE ECOL	111	3.200	3.293	3.648
37	ADV ECOL RES	13	3.077	0.762	3.000
38	B AM MUS NAT HIST	16	3.057	4.133	6.889
39	ECOTOXICOLOGY	158	3.051	3.507	2.879
40	PALEOBIOLOGY	34	3.045	2.985	3.423

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