Ecological Archives M085-009-A5

Ecological Archives M085-009-A5

Stephen C. Sillett, Robert Van Pelt, Allyson L. Carroll, Russell D. Kramer, Anthony R. Ambrose, and D’Arcy Trask. 2015. How do tree structure and old age affect growth potential of California redwoods? Ecological Monographs 85:180–211. http://dx.doi.org/10.1890/14-1016.1

Appendix E (Table E1). Coefficients for power functions used to predict rates of wood radius change at multiple trunk heights in two species.¹

		10 m		20 m		30 m		40 m		50 m		60 m
Species	Location	a	b	a	b	a	b	a	b	a	b	a	b
Sequoia sempervirens	JS	883	0.5863	1022	0.5699	1166	0.5969	1365	0.6827	1726	0.8290	1621	0.5507
	PC	773	0.4606	920	0.4102	1031	0.4876	1156	0.4597	1194	0.4220	1473	0.4481
	RNP lowland	795	0.3171	894	0.2960	1008	0.3242	1001	0.6102	1234	0.8722	1455	0.9381
	RNP upland	1347	0.2284	1621	0.1805	1833	0.1962	1960	0.2006	2059	0.2524	2238	0.2804
	HR	987	0.3022	1134	0.3291	1281	0.3004	1343	0.2545	1334	0.3136	1411	0.3652
	MW	1697	0.3633	1450	0.4093	1214	0.4101	1908	0.3141	2226	0.6263	2421	0.6997
	SPT	993	0.1120	1125	0.2226	1180	0.2851	1164	0.2489	1171	0.2353	—	—
	BB	840	0.3421	857	0.2174	841	0.1776	905	0.2241	845	0.1485	—	—
	LH	1219	0.7150	1150	0.5318	1252	0.5112	925	0.2849	—	—	—	—
Sequoiadendron giganteum	CBT	1018	0.7793	1221	0.7260	1384	0.7297	1493	0.7970	1694	0.6895	1958	0.5728
	WF	569	0.7242	756	0.8064	938	0.7785	1044	0.7143	1328	0.6671	1651	0.5021
	RMG	893	0.8492	990	0.8571	1097	0.7882	1168	0.6972	1262	0.5676	1585	0.5749
	GF	1056	0.3395	1102	0.3685	1082	0.3561	1133	0.3315	1177	0.3367	—	—
	MH	1156	0.4753	1229	0.4608	1285	0.4354	1387	0.5017	1646	0.5223	1862	0.5943
	FC	988	0.5074	1069	0.5130	1081	0.6174	1152	0.5304	1687	0.6264	1884	0.4283

¹ Equations take form Y = aX^b, where Y = slope (yr m^-1) and X = wood radius (m). Small sample sizes precluded equations for some heights at some locations. All source data from unsuppressed trees. Location abbreviations given in Table 2.

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