Carbon density and its spatial distribution in the Potentilla fruticosa dominated alpine shrub in Qinghai, China

doi:10.17521/cjpe.2016.0038

Abstract

Abstract:

Aims Shrub recovery is recognized as an important cause of the increase of carbon stocks in China, and yet there are great uncertainties in the carbon sink capacities of shrubs. Our objectives were to estimate carbon density and its spatial distribution in alpine shrubs.
Methods Eight sites in Potentilla fruticosa dominated shrublands across Qinghai, China were investigated. Plant biomass and carbon content in leaves, branches and stems, and roots were measured to analyze the biomass allocation and carbon density.
Important findings Mean carbon densities in biological carbon, litter, soil and whole ecosystem of P. fruticosa shrublands were 5088.54, 542.1, 35903.76 and 41534.4 kg·hm^-2, respectively. Carbon density in the shrub layer was more than 68% of the biological carbon density of the whole ecosystem and was mainly distributed in roots (49.5%-56.1%). Carbon density of the herbaceous layer was 22.5% of the biological carbon density of the whole ecosystem and was also mainly distributed in roots (59.6%-75.1%). The biological carbon density of P. fruticosa shrublands (5.08 t·hm^-2) was lower than the average carbon density of shrub communities in China (10. 88 t·hm^-2). Soil carbon density contributed the largest proportion (85.8%) of total carbon density in P. fruticosa shrublands.

http://jtp.cnki.net/bilingual/detail/html/ZWSB201701008

Key words: biological carbon density, litter carbon density, soil organic carbon density, total carbon density

Lu-Cun YANG, Chang-Bin LI, Yi NING, Xiu-Qing NIE, Wen-Hua XU, Guo-Ying ZHOU. Carbon density and its spatial distribution in the Potentilla fruticosa dominated alpine shrub in Qinghai, China[J]. Chin J Plant Ecol, 2017, 41(1): 62-70.

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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2016.0038

https://www.plant-ecology.com/EN/Y2017/V41/I1/62

Figures/Tables 5

References 32

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代码 Code	调查地区 Location	纬度 Latitude (N)	经度 Longitude (E)	海拔 Altitude (m)	平均盖度 Average coverage (%)	灌木物种组成 Composition of shrub species
Q1	青海门源 Menyuan, Qinghai	37.22°	101.24°	3 399	50	金露梅 Potentilla fruticosa, 山生柳 Salix oritrepha, 高山绣线菊 Spiraea alpine, 鬼箭锦鸡儿 Caragana jubata
Q2	青海祁连 Qilian, Qinghai	38.05°	100.21°	2 973	65	金露梅 Potentilla fruticosa, 山生柳 Salix oritrepha, 高山绣线菊 Spiraea alpina
Q3	青海玉树 Yushu, Qinghai	33.02°	96.50°	4 132	60	金露梅 Potentilla fruticosa, 山生柳 Salix oritrepha, 高山绣线菊 Spiraea alpine, 千里香杜鹃 Rhododendron thymifolium
Q4	青海刚察 Gangcha, Qinghai	37.25°	100.15°	3 614	60	金露梅 Potentilla fruticosa
Q5	青海天峻 Tianjun, Qinghai	37.31°	99.19°	3 567	65	金露梅 Potentilla fruticosa, 山生柳 Salix oritrepha
Q6	青海大通 Datong, Qinghai	37.29°	101.43°	2 959	80	金露梅 Potentilla fruticosa, 山生柳 Salix oritrepha, 沙棘 Hippophae rhamnoides
Q7	青海兴海 Xinghai, Qinghai	35.85°	99.92°	3 579	65	金露梅 Potentilla fruticosa
Q8	青海贵南 Guinan, Qinghai	35.47°	100.74°	3 583	60	金露梅 Potentilla fruticosa

代码 Code	调查地区 Location	纬度 Latitude (N)	经度 Longitude (E)	海拔 Altitude (m)	平均盖度 Average coverage (%)	灌木物种组成 Composition of shrub species
Q1	青海门源 Menyuan, Qinghai	37.22°	101.24°	3 399	50	金露梅 Potentilla fruticosa, 山生柳 Salix oritrepha, 高山绣线菊 Spiraea alpine, 鬼箭锦鸡儿 Caragana jubata
Q2	青海祁连 Qilian, Qinghai	38.05°	100.21°	2 973	65	金露梅 Potentilla fruticosa, 山生柳 Salix oritrepha, 高山绣线菊 Spiraea alpina
Q3	青海玉树 Yushu, Qinghai	33.02°	96.50°	4 132	60	金露梅 Potentilla fruticosa, 山生柳 Salix oritrepha, 高山绣线菊 Spiraea alpine, 千里香杜鹃 Rhododendron thymifolium
Q4	青海刚察 Gangcha, Qinghai	37.25°	100.15°	3 614	60	金露梅 Potentilla fruticosa
Q5	青海天峻 Tianjun, Qinghai	37.31°	99.19°	3 567	65	金露梅 Potentilla fruticosa, 山生柳 Salix oritrepha
Q6	青海大通 Datong, Qinghai	37.29°	101.43°	2 959	80	金露梅 Potentilla fruticosa, 山生柳 Salix oritrepha, 沙棘 Hippophae rhamnoides
Q7	青海兴海 Xinghai, Qinghai	35.85°	99.92°	3 579	65	金露梅 Potentilla fruticosa
Q8	青海贵南 Guinan, Qinghai	35.47°	100.74°	3 583	60	金露梅 Potentilla fruticosa

层次/器官 Layer/organ		样地 Sampling site								平均 Average
层次/器官 Layer/organ		青海门源 Menyuan, Qinghai	青海祁连 Qilian, Qinghai	青海玉树 Yushu, Qinghai	青海刚察Gangcha, Qinghai	青海天峻Tianjun, Qinghai	青海大通Datong, Qinghai	青海兴海Xinghai, Qinghai	青海贵南Guinan, Qinghai	平均 Average
灌木层 Shrub layer	叶 Leaf	391.81 ± 42.45^a	665.50 ± 41.65^b	598.030 ± 23.65^ab	753.39 ± 90.58^b	425.65 ± 68.75^a	1 065.54 ± 91.63^c	580.96 ± 45.58^ab	1 057.52 ± 98.76^c	692.30 ± 53.89
	枝 Branch	2 677.35 ± 478.95^abc	3 083.58 ± 468.43^abc	4 527.30 ± 1014.2^c	3 548.54 ± 135.69^abc	2 313.81 ± 445.49^ab	2 055.72 ± 446.22^a	2 206.73 ± 119.62^a	4 198.33 ± 864.11^bc	3 076.43 ± 248.61
	根 Root	3 405.82 ± 822.31^a	4 745.91 ± 831.42^abc	5 538.02 ± 235.86^bc	5 715.92 ± 675.68^bc	3 212.59 ± 852.82^a	4 119.84 ± 605.00^ab	3 239.50 ± 178.57^a	6 767.94 ± 599.21^c	4 593.19 ± 321.39
	合计 Total	6 474.98 ± 1231.8^a	8 494.99 ± 1 205.1^ab	10 663.36 ± 897.24^bc	10 017.85 ± 900.44^bc	5 952.05 ± 918.99^a	7 241.10 ± 1060.2^ab	6 027.10 ± 302.16^a	12 023.80 ± 1 536.0^c	8 361.92 ± 549.46
草本层 Herb layer	叶 Leaf	406.21 ± 64.50^a	762.57 ± 115.41^ab	1 534.51 ± 292.50^b	834.52 ± 48.88^ab	1 402.72 ± 684.49^b	340.36 ± 119.32^a	683.52 ± 128.13^ab	727.74 ± 58.50^ab	836.52 ± 116.46
	根 Root	1 438.43 ± 388.53^a	1 761.69 ± 45.60^ab	9 852.47 ± 2 780.3^c	5 486.23 ± 1 915.2^b	5 494.34 ± 1 125.2^b	735.05 ± 264.70^a	1 274.49 ± 155.68^a	1 612.09 ± 253.11^ab	3 274.15 ± 753.52
	合计 Total	1 844.64 ± 441.05^a	2 524.26 ± 160.98^ab	11 386.98 ± 2 973.4^d	6 320.75 ± 1 964.0^bc	6 897.06 ± 1 710.5^c	1 075.41 ± 380.29^a	1 958.01 ± 277.09^ab	2 339.83 ± 285.17^ab	4 293.37 ± 838.27
凋落物层 Litter layer		1 352.4 ± 149.86^bc	1 653.93 ± 42.58^c	2 846.63 ± 504.94^d	826.93 ± 19.22^ab	1 122.5 ± 143.50^bc	897.57 ± 116.48^ab	907.57 ± 97.57^ab	365.77 ± 65.34^a	1 246.66 ± 158.05
生物层 Biological layer		9 672.02 ± 1 635.3^ab	12 673.18 ± 1 319.4^ab	24 896.97 ± 4 321.5^c	17 165.53 ± 2 217.8^b	13 971.61 ± 2 643.3^ab	9 214.08 ± 1184.5^a	9 202.41 ± 647.34^a	14 729.4 ± 1 364.9^ab	13 940.65 ± 1 222.3

层次/器官 Layer/organ		样地 Sampling site								平均 Average
层次/器官 Layer/organ		青海门源 Menyuan, Qinghai	青海祁连 Qilian, Qinghai	青海玉树 Yushu, Qinghai	青海刚察Gangcha, Qinghai	青海天峻Tianjun, Qinghai	青海大通Datong, Qinghai	青海兴海Xinghai, Qinghai	青海贵南Guinan, Qinghai	平均 Average
灌木层 Shrub layer	叶 Leaf	391.81 ± 42.45^a	665.50 ± 41.65^b	598.030 ± 23.65^ab	753.39 ± 90.58^b	425.65 ± 68.75^a	1 065.54 ± 91.63^c	580.96 ± 45.58^ab	1 057.52 ± 98.76^c	692.30 ± 53.89
	枝 Branch	2 677.35 ± 478.95^abc	3 083.58 ± 468.43^abc	4 527.30 ± 1014.2^c	3 548.54 ± 135.69^abc	2 313.81 ± 445.49^ab	2 055.72 ± 446.22^a	2 206.73 ± 119.62^a	4 198.33 ± 864.11^bc	3 076.43 ± 248.61
	根 Root	3 405.82 ± 822.31^a	4 745.91 ± 831.42^abc	5 538.02 ± 235.86^bc	5 715.92 ± 675.68^bc	3 212.59 ± 852.82^a	4 119.84 ± 605.00^ab	3 239.50 ± 178.57^a	6 767.94 ± 599.21^c	4 593.19 ± 321.39
	合计 Total	6 474.98 ± 1231.8^a	8 494.99 ± 1 205.1^ab	10 663.36 ± 897.24^bc	10 017.85 ± 900.44^bc	5 952.05 ± 918.99^a	7 241.10 ± 1060.2^ab	6 027.10 ± 302.16^a	12 023.80 ± 1 536.0^c	8 361.92 ± 549.46
草本层 Herb layer	叶 Leaf	406.21 ± 64.50^a	762.57 ± 115.41^ab	1 534.51 ± 292.50^b	834.52 ± 48.88^ab	1 402.72 ± 684.49^b	340.36 ± 119.32^a	683.52 ± 128.13^ab	727.74 ± 58.50^ab	836.52 ± 116.46
	根 Root	1 438.43 ± 388.53^a	1 761.69 ± 45.60^ab	9 852.47 ± 2 780.3^c	5 486.23 ± 1 915.2^b	5 494.34 ± 1 125.2^b	735.05 ± 264.70^a	1 274.49 ± 155.68^a	1 612.09 ± 253.11^ab	3 274.15 ± 753.52
	合计 Total	1 844.64 ± 441.05^a	2 524.26 ± 160.98^ab	11 386.98 ± 2 973.4^d	6 320.75 ± 1 964.0^bc	6 897.06 ± 1 710.5^c	1 075.41 ± 380.29^a	1 958.01 ± 277.09^ab	2 339.83 ± 285.17^ab	4 293.37 ± 838.27
凋落物层 Litter layer		1 352.4 ± 149.86^bc	1 653.93 ± 42.58^c	2 846.63 ± 504.94^d	826.93 ± 19.22^ab	1 122.5 ± 143.50^bc	897.57 ± 116.48^ab	907.57 ± 97.57^ab	365.77 ± 65.34^a	1 246.66 ± 158.05
生物层 Biological layer		9 672.02 ± 1 635.3^ab	12 673.18 ± 1 319.4^ab	24 896.97 ± 4 321.5^c	17 165.53 ± 2 217.8^b	13 971.61 ± 2 643.3^ab	9 214.08 ± 1184.5^a	9 202.41 ± 647.34^a	14 729.4 ± 1 364.9^ab	13 940.65 ± 1 222.3

样地 Sampling site	土层 Soil layer (cm)						合计 Total
样地 Sampling site	0-10	10-20	20-30	30-50	50-70	70-100	合计 Total
Q1	9.98	8.02	8.54	3.36	1.60	0.79	32.29
Q2	9.86	9.19	6.63	3.05	3.71	1.03	33.47
Q3	9.78	7.00	5.71	4.38	3.83	3.69	34.39
Q4	9.03	6.81	5.80	3.49	3.19	2.52	30.84
Q5	9.42	6.18	5.66	1.71	1.73	2.44	27.14
Q6	3.55	5.06	6.68	5.53	4.07	-	24.89
Q7	12.29	5.50	4.13	4.43	4.72	4.59	35.66
Q8	8.31	6.70	3.27	2.83	2.70	2.58	26.39
平均 Average	9.03	6.81	5.80	3.60	3.19	2.52	30.63