Tree biomass and carbon stock of a community‐managed mangrove forest in Bohol, Philippines

Figures & data

Table 1. Land use of Bohol Province.

Land use	Area (ha)
Agriculture	169,678.4
Upland forest	41,145.6
Mangrove (tree)	10,597.6
Mangrove (palm)	4722.4
Beach	203.0
Fishpond	1137.8
Open/grassland	158,007.8
Mining	1007.8
Unclassified	1744.0
Built-up	6571.8
Total	394816.2

Figure 1. Location of the study site.

Figure 2. General view of Banacon Island. a, mangrove plantations mainly composed of bakawans or Rhizophora sp; b, local community.

Figure 3. General view of R. stylosa plantations based on age. a, 15 years; b, 20 years; c, 40 years. d, natural stand.

Table 2. Species composition across the stands.

Stand	Species	Stem per plot	DBH range (cm)	Average DBH (cm)	Height range (m)
P-15	Rhizophora stylosa	180–324	2.1–11.9	4.1	5.0–6.0
P-20	Rhizophora stylosa	60–149	2.7–10.3	6.6	6.0–8.0
P-40	Rhizophora stylosa	111–229	3.5–15.6	9.0	9.0–10.0
P-N	Rhizophora stylosa	3–33	4.1–18.1	10.6	4.0–12.0
	Avicennia marina	2–8	4.6–68.2	13.8	4.5–11.0
	Avicennia marina var. rumphiana	1	4.6	4.6	8.0
	Sonneratia alba	1	6.4	6.4	9.0

Figure 4. Summary of biomass and carbon density values across different mangrove stands.

Table 3. Biomass and carbon stocks of R. stylosa plantations and natural stands in Banacon, Bohol.

Stand	Aboveground		Root		Total
	Biomass (ton ha^−1)	Carbon (ton ha^−1)	Biomass (ton ha^−1)	Carbon (ton ha^−1)	Biomass (ton ha^−1)	Carbon (ton ha^−1)
P-15
Plot 1	296.8	133.6	162.6	73.2	459.5	206.8
Plot 2	251.1	113.0	140.5	63.2	391.6	176.2
Plot 3	388.0	174.6	151.1	68.0	539.1	242.6
Average	312.0	140.4	151.4	68.1	463.4	208.5
SD	69.7	31.4	11.1	5.0	73.8	33.2
P-20
Plot 1	285.6	128.5	147.1	66.2	432.7	194.7
Plot 2	243.0	109.3	126.7	57.0	369.7	166.4
Plot 3	129.1	58.1	65.2	29.3	194.2	87.4
Average	219.2	98.6	113.0	50.8	332.2	149.5
SD	80.9	36.4	42.6	19.2	123.6	55.6
P-40
Plot 1	542.8	244.2	255.5	115.0	798.3	359.2
Plot 2	635.2	285.8	312.8	140.7	948.0	426.6
Plot 3	492.8	221.8	232.0	104.4	724.8	326.2
Average	556.9	250.6	266.8	120.0	823.7	370.7
SD	72.2	32.5	41.6	18.7	113.7	51.2
P-N
Plot 1	118.1	53.2	55.7	25.1	173.9	78.3
Plot 2	434.1	195.4	143.3	64.5	577.4	259.8
Plot 3	156.8	70.6	62.6	28.2	219.4	98.7
Average	236.3	106.4	87.2	39.3	323.6	145.6
SD	172.4	77.6	48.7	21.9	221.0	99.4

Figure 5. Carbon stock of Rhizophora stylosa across age.