Variations of plant and soil 87Sr/86Sr along the slope of a tropical inselberg

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Table II

Strontium, Ca, K, P concentrations and ⁸⁷Sr/⁸⁶Sr isotopic ratio in leaves and leaf litters of the different plant species sampled on the Nouragues site.

Sample	Vegetation	Site	Sr μg g⁻¹	Ca mg g⁻¹	K mg g⁻¹	P mg g⁻¹	⁸⁷Sr/⁸⁶Sr
Crust	Cyanobacteria	i1	6.60	0.53	2.20	0.14	0.723
		i2	6.00	0.48	1.91	0.14	0.729

Leaves	Pitcairnia	i1	11.78	1.95	11.52	0.45	0.723

	geyskesii	i2	13.99	1.91	12.96	0.36	0.724
		i3	11.21	2.07	13.85	0.42
		t1	6.67	1.41	14.26	0.47	0.751
		t2	9.72	2.40	13.26	0.50	0.728
		t3	6.28	1.82	15.99	0.50

	Clusiaceae	i1	44.79	5.28	9.98	0.34	0.728
		i2	51.71	7.26	9.34	0.32	0.730
		i3	60.52	8.59	11.84	0.30
		t1	60.56	7.15	12.37	0.33	0.753
		t2	56.10	6.14	10.95	0.35	0.730
		t3	43.63	5.08	11.91	0.38

	Catopsis	i1	3.17	0.65	4.32	0.29	0.722
	berteroniana	i2	5.72	0.93	3.17	0.20	0.720
		i3	4.45	0.87	3.94	0.22

	Vriesea	IF	6.07	0.67	17.69	0.35	0.752
	splendens

Leaf litter	Low forest	IF	38.28	2.84	1.59	0.07	0.747
		IF	49.47	3.12	2.53	0.08	0.756
		TR1	84.78	10.06	2.01	0.08	0.758
		TR2	55.06	7.12	3.41	0.06
		TR3	68.55	6.75	2.46	0.09	0.764
		TR4	31.46	4.83	2.66	0.18	0.760
		TR5	29.98	4.52	3.09	0.19
		TR6	37.60	4.79	3.64	0.20	0.762
	Transition forest	TR7	47.27	4.86	4.14	0.15
		TR8	46.59	4.05	2.66	0.13
		TR9	45.31	3.89	2.88	0.14	0.757
		R10	52.69	5.13	2.84	0.20	0.757
	High forest	TR11	52.89	5.10	2.79	0.20	0.759
		TR12	49.76	4.81	3.86	0.21	0.760
		TR13	47.44	6.41	2.88	0.18	0.758
		GP	77.73	10.18	2.55	0.13	0.713