Journal of Resources and Ecology ›› 2019, Vol. 10 ›› Issue (5): 472-480.DOI: 10.5814/j.issn.1674-764X.2019.05.002
• Resources and Ecology in the Qinghai-Tibet Plateau • Previous Articles Next Articles
SUN Wei1, LI Meng1,2, WANG Junhao1,2, FU Gang1,*()
Received:
2019-04-15
Accepted:
2019-06-20
Online:
2019-09-30
Published:
2019-10-11
Contact:
FU Gang
Supported by:
SUN Wei, LI Meng, WANG Junhao, FU Gang. Driving Mechanism of Gross Primary Production Changes and Implications for Grassland Management on the Tibetan Plateau[J]. Journal of Resources and Ecology, 2019, 10(5): 472-480.
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URL: http://www.jorae.cn/EN/10.5814/j.issn.1674-764X.2019.05.002
Slope comparison | Cause of GPPa change |
---|---|
Sa > 0 and abs(Sp) > abs(Sh) | GPPa increase mainly due to climatic change (ICC) |
Sa > 0 and abs(Sp) < abs(Sh) | GPPa increase mainly due to human activities (IHA) |
Sa < 0 and abs(Sp) > abs(Sh) | GPPa decrease mainly due to climatic change (DCC) |
Sa < 0 and abs(Sp) < abs(Sh) | GPPa decrease mainly due to human activities (DHA) |
Slope comparison | Cause of GPPa change |
---|---|
Sa > 0 and abs(Sp) > abs(Sh) | GPPa increase mainly due to climatic change (ICC) |
Sa > 0 and abs(Sp) < abs(Sh) | GPPa increase mainly due to human activities (IHA) |
Sa < 0 and abs(Sp) > abs(Sh) | GPPa decrease mainly due to climatic change (DCC) |
Sa < 0 and abs(Sp) < abs(Sh) | GPPa decrease mainly due to human activities (DHA) |
Fig. 2 Interannual variations of GPPa, GPPp and GPPh Note: GPPa: actual gross primary production (GPP); GPPp: climate- driven potential GPP; GPPh: human-induced GPP; Sa: the anomaly of spatially averaged GPPa; Sp: the anomaly of spatially averaged GPPp; Sh: the anomaly of spatially averaged GPPh
Fig. 3 The change trends of (a) GPPa, (b) GPPp and (c) GPPh Note: GPPa: actual gross primary production (GPP); GPPp: climate-driven potential GPP; GPPh: human-induced GPP; Sa: the anomaly of spatially averaged GPPa; Sp: the anomaly of spatially averaged GPPp; Sh: the anomaly of spatially averaged GPPh.
Fig. 4 Spatial distribution of different drivers of alpine grassland GPP change Note: GPP: gross primary production; DCC: actual gross primary production (GPPa) decrease due to climatic change; DHA: GPPa decrease due to human activities; ICC: GPPa increase due to climatic change; IHA: GPPa increase due to human activities.
Fig. 5 Interannual variation of GPPa, GPPp and GPPh in (a) DCC, (b) DHA, (c) ICC and (d) IHA regions for meadows and steppes. Note: GPPa: actual gross primary production (GPP); GPPp: climate-driven potential GPP; GPPh: human-induced GPP; Sa: the anomaly of spatially averaged GPPa; Sp: the anomaly of spatially averaged GPPp; Sh: the anomaly of spatially averaged GPPh; DCC: actual gross primary production (GPPa) decrease due to climatic change; DHA: GPPa decrease due to human activities; ICC: GPPa increase due to climatic change; IHA: GPPa increase due to human activities.
Steppes | Meadows | |||||||
---|---|---|---|---|---|---|---|---|
DCC | DHA | ICC | IHA | DCC | DHA | ICC | IHA | |
Sa | -0.44 | -0.55 | 1.89 | 0.67 | -0.60 | -0.80 | 1.68 | 1.20 |
Sp | -2.49 | 1.62 | 3.47 | -1.69 | -3.02 | 4.31 | 4.97 | -2.18 |
Sh | -2.05 | 2.16 | 1.58 | -2.36 | -2.42 | 5.11 | 3.28 | -3.38 |
Steppes | Meadows | |||||||
---|---|---|---|---|---|---|---|---|
DCC | DHA | ICC | IHA | DCC | DHA | ICC | IHA | |
Sa | -0.44 | -0.55 | 1.89 | 0.67 | -0.60 | -0.80 | 1.68 | 1.20 |
Sp | -2.49 | 1.62 | 3.47 | -1.69 | -3.02 | 4.31 | 4.97 | -2.18 |
Sh | -2.05 | 2.16 | 1.58 | -2.36 | -2.42 | 5.11 | 3.28 | -3.38 |
Fig. 6 The change trends of actual Sa, Sp and Sh in (a) meadows and steppes, (b) meadows and (c) steppes. Note: Sa: the anomaly of spatially averaged actual gross primary production; Sp: the anomaly of spatially averaged climate-driven potential gross primary production; Sh: the anomaly of spatially averaged human-induced gross primary production.
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