Effects of ecological engineering on net primary production in the Chang Tang and Sanjiangyuan national nature reserves on the Tibetan Plateau

doi:10.17520/biods.2015082

Abstract

Abstract:

Long term series of remotely sensed imagery of net primary production (NPP) data could reflect ecosystem health. In this study, we employed NPP to evaluate the effects of ecological engineering (nature reserve and new ecological engineering in 2004 or 2005 techniques) by the sampling area comparison method in the Chang Tang and Sanjiangyuan national nature reserves on the Tibetan Plateau. The results showed that: (1) among the 10 pairs of sampling areas, annual NPP of 9 pairs tended to increase between 1982 and 2009; (2) the new ecological engineering techniques improved the effectiveness of ecosystem conservation, with NPP in 8 pairs of sampling areas increasing faster than before; and (3) among all alpine grassland types, the new ecological engineering techniques remarkably improved the effectiveness of conserving the meadows.

http://jtp.cnki.net/bilingual/detail/html/SWDY201602002

Key words: ecological engineering, nature reserve, net primary production, Sanjiangyuan, Chang Tang, sampling area comparison method

Wei Qi, Wanqi Bai, Yili Zhang, Xue Wu, Lanhui Li, Mingjun Ding, Caiping Zhou. Effects of ecological engineering on net primary production in the Chang Tang and Sanjiangyuan national nature reserves on the Tibetan Plateau[J]. Biodiv Sci, 2016, 24(2): 127-135.

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URL: https://www.biodiversity-science.net/EN/10.17520/biods.2015082

https://www.biodiversity-science.net/EN/Y2016/V24/I2/127

Figures/Tables 5

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样区编号 No. of sampling area	自然保护区 Nature reserve	高寒草地类型 Type of alpine grassland	样区内/外有效像元数(个) Number of effective pixels of sampling areas (inside/outside)	样区编号 No. of sampling area	自然保护区 Nature reserve	高寒草地类型 Type of alpine grassland	样区内/外有效像元数(个) Number of effective pixels of l sampling areas (inside/outside)
01	羌塘 Chang Tang	高寒荒漠 Alpine desert	62/66	06	三江源 Sanjiangyuan	高寒草甸 Alpine meadow	115/106
02	羌塘 Chang Tang	高寒草原 Alpine steppe	102/84	07	三江源 Sanjiangyuan	高寒草甸 Alpine meadow	115/145
03	三江源 Sanjiangyuan	高寒草甸 Alpine meadow	70/95	08	三江源 Sanjiangyuan	高寒草甸 Alpine meadow	125/94
04	三江源 Sanjiangyuan	高寒草甸 Alpine meadow	132/98	09	三江源 Sanjiangyuan	高寒草甸 Alpine meadow	77/80
05	三江源 Sanjiangyuan	高寒草甸 Alpine meadow	148/95	10	三江源 Sanjiangyuan	高寒草原 Alpine steppe	70/70

样区编号 No. of sampling area	自然保护区 Nature reserve	高寒草地类型 Type of alpine grassland	样区内/外有效像元数(个) Number of effective pixels of sampling areas (inside/outside)	样区编号 No. of sampling area	自然保护区 Nature reserve	高寒草地类型 Type of alpine grassland	样区内/外有效像元数(个) Number of effective pixels of l sampling areas (inside/outside)
01	羌塘 Chang Tang	高寒荒漠 Alpine desert	62/66	06	三江源 Sanjiangyuan	高寒草甸 Alpine meadow	115/106
02	羌塘 Chang Tang	高寒草原 Alpine steppe	102/84	07	三江源 Sanjiangyuan	高寒草甸 Alpine meadow	115/145
03	三江源 Sanjiangyuan	高寒草甸 Alpine meadow	70/95	08	三江源 Sanjiangyuan	高寒草甸 Alpine meadow	125/94
04	三江源 Sanjiangyuan	高寒草甸 Alpine meadow	132/98	09	三江源 Sanjiangyuan	高寒草甸 Alpine meadow	77/80
05	三江源 Sanjiangyuan	高寒草甸 Alpine meadow	148/95	10	三江源 Sanjiangyuan	高寒草原 Alpine steppe	70/70

样区 Sampling area		分析时段 Analysis period				第二阶段与第一阶段的NPP变化速率差值(P_2-1)^* The difference of NPP change rate between the second stage and the first stage (P_2-1)^*	第三阶段与第一阶段的NPP变化速率差值(P_3-1)^* The difference of NPP change rate between the third stage and the first stage (P_3-1)^*
编号 No.	样区组 Sampling area pair	全时段^* (1982-2009) Whole period (1982-2009)	第一阶段(K₁)^(1982年至建立自然保护区) First stage (K₁)^(1982 to implementation of nature reserve)	第二阶段(K₂)(建立自然保护区至实施新生态工程) Second stage (K₂) (implementation of nature reserve to new ecological engineering in 2000s)	第三阶段(K₃) (实施新生态工程至2009年) Third stage (K₃) (implementation of new ecological engineering in 2000s to 2009)
01	区内 Inside	0.057	-0.005	-0.222	3.067	-0.163	0.288
01	区外 Outside	-0.004	-0.194	-0.248	2.591	-0.163	0.288
02	区内 Inside	0.108	0.134	0.073	2.454	0.108	-0.640
02	区外 Outside	0.104	0.072	-0.097	3.032	0.108	-0.640
03	区内 Inside	0.095	0.170	-3.709	6.896	-1.529	1.700
03	区外 Outside	0.085	0.096	-2.253	5.122	-1.529	1.700
04	区内 Inside	-0.131	-0.382	-3.768	4.561	-0.872	0.170
04	区外 Outside	0.130	-0.012	-2.527	4.761	-0.872	0.170
05	区内 Inside	0.524	-0.287	-2.619	15.643	-1.303	9.778
05	区外 Outside	0.537	0.320	-0.709	6.472	-1.303	9.778
06	区内 Inside	0.643	0.094	-0.750	2.200	1.119	1.717
06	区外 Outside	0.654	0.479	-1.485	0.868	1.119	1.717
07	区内 Inside	0.721	-0.134	4.287	-2.174	0.934	1.951
07	区外 Outside	0.742	-0.167	3.321	-4.158	0.934	1.951
08	区内 Inside	1.291	1.588	3.770	-9.409	5.422	0.587
08	区外 Outside	1.370	2.075	-1.165	-9.509	5.422	0.587
09	区内 Inside	0.813	0.533	-0.138	-5.442	-0.346	1.390
09	区外 Outside	0.621	0.716	0.390	-6.649	-0.346	1.390
10	区内 Inside	1.104	-0.943	4.482	20.468	-7.384	8.197
10	区外 Outside	1.157	-1.050	11.759	12.165	-7.384	8.197

样区 Sampling area		分析时段 Analysis period				第二阶段与第一阶段的NPP变化速率差值(P_2-1)^* The difference of NPP change rate between the second stage and the first stage (P_2-1)^*	第三阶段与第一阶段的NPP变化速率差值(P_3-1)^* The difference of NPP change rate between the third stage and the first stage (P_3-1)^*
编号 No.	样区组 Sampling area pair	全时段^* (1982-2009) Whole period (1982-2009)	第一阶段(K₁)^(1982年至建立自然保护区) First stage (K₁)^(1982 to implementation of nature reserve)	第二阶段(K₂)(建立自然保护区至实施新生态工程) Second stage (K₂) (implementation of nature reserve to new ecological engineering in 2000s)	第三阶段(K₃) (实施新生态工程至2009年) Third stage (K₃) (implementation of new ecological engineering in 2000s to 2009)
01	区内 Inside	0.057	-0.005	-0.222	3.067	-0.163	0.288
01	区外 Outside	-0.004	-0.194	-0.248	2.591	-0.163	0.288
02	区内 Inside	0.108	0.134	0.073	2.454	0.108	-0.640
02	区外 Outside	0.104	0.072	-0.097	3.032	0.108	-0.640
03	区内 Inside	0.095	0.170	-3.709	6.896	-1.529	1.700
03	区外 Outside	0.085	0.096	-2.253	5.122	-1.529	1.700
04	区内 Inside	-0.131	-0.382	-3.768	4.561	-0.872	0.170
04	区外 Outside	0.130	-0.012	-2.527	4.761	-0.872	0.170
05	区内 Inside	0.524	-0.287	-2.619	15.643	-1.303	9.778
05	区外 Outside	0.537	0.320	-0.709	6.472	-1.303	9.778
06	区内 Inside	0.643	0.094	-0.750	2.200	1.119	1.717
06	区外 Outside	0.654	0.479	-1.485	0.868	1.119	1.717
07	区内 Inside	0.721	-0.134	4.287	-2.174	0.934	1.951
07	区外 Outside	0.742	-0.167	3.321	-4.158	0.934	1.951
08	区内 Inside	1.291	1.588	3.770	-9.409	5.422	0.587
08	区外 Outside	1.370	2.075	-1.165	-9.509	5.422	0.587
09	区内 Inside	0.813	0.533	-0.138	-5.442	-0.346	1.390
09	区外 Outside	0.621	0.716	0.390	-6.649	-0.346	1.390
10	区内 Inside	1.104	-0.943	4.482	20.468	-7.384	8.197
10	区外 Outside	1.157	-1.050	11.759	12.165	-7.384	8.197

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