A national assessment of urban forest carbon storage and sequestration in Canada

Table 3 Summary of i-Tree Eco carbon estimates for Canadian urban forest assessments, including total assessment area, number of assessment plots, and estimates of total values and their standard errors (SE)

City	Assessment area (ha)^a	Plots	Number of trees_b		Carbon storage (t)		Carbon sequestration (t year⁻¹)
City	Assessment area (ha)^a	Plots	Total	SE	Mean	SE	Mean	SE
Halifax	69,270	190	57,862,251	4,214,326	2,134,697	156,789	118,483	8228
Ajax	6743	198	1,365,760	228,063	105,641	18,065	3547	471
Aurora	4943	205	1,955,031	265,477	102,981	12,824	4050	418
Bolton	1677	46	311,080	102,217	12,682	4341	757	185
Brampton	26,945	196	3,617,714	776,086	174,736	30,078	7732	1130
Caledon	478	37	302,595	97,972	13,689	3468	590	128
London	23,591	383	4,375,760	479,761	359,763	42,669	12,451	1145
Markham	21,269	213	3,154,950	541,758	229,886	42,226	9229	1413
Mississauga	28,801	205	2,104,091	306,994	202,870	40,786	10,002	1493
Oakville	9893	367	1,849,305	186,485	49,724	4937	4177	390
Pickering	4718	219	1,671,866	194,685	104,191	13,733	4242	428
Richmond hill	10,201	208	2,559,349	322,465	165,699	26,595	7241	876
Toronto	63,727	407	10,220,059	952,441	1,107,645	99,010	46,741	3302
Kelowna	21,723	150	3,302,464	620,998	126,911	19,245	7713	1300
Calgary	55,032	196	2,076,400	498,395	183,595	39,072	10,108	1679
Edmonton	69,985	307	12,808,192	2,106,252	615,774	91,284	31,848	4055
Seattle^c	54,324	223	1,483,837	–	535,261	–	37,817	–

SE values use the same units as mean values
^aAssessment area is derived from the study areas delineated during i-Tree Eco assessments and may differ from other defined urban areas for municipalities
^bNote that standard error values from the i-Tree Eco data are derived from sampling error and not error of estimation, as estimation error is unknown [18]
^cSeattle data were used to develop carbon rates for the Pacific Maritime ecozone since no Canadian data were available

ISSN: 1750-0680