The impact of different factors on the outcomes of grassland ecological restoration to in China： A Meta-analysis

doi:10.11686/cyxb2020112

Abstract

Abstract:

Grassland covers more than 40% of land area， and grassland ecological degradation has attracted great attention. In recent years， a range of grassland restoration measures have been undertaken in various regions， but the specific recovery effects are undocumented. A total of 86 Chinese and English publications on grassland restoration in China were collected from a publication database for Meta-analysis， and the restoration outcomes in terms of grassland biodiversity and ecosystem services in China were quantitatively evaluated. Through sub-group analysis， the regional location， the grassland type and the degree of grassland degradation prior to the recovery activity， the recovery method， recovery time， recovery area， and the response of each ecological grassland type to the grassland recovery activity were obtained. The results show that the grassland restoration activities have had varying degrees of success in restoring degraded grassland. The recovery time has a major impact on the degree of recovery achieved. The longer the recovery time， the better the recovery effect； Active measures improve the recovery speed of degraded grassland， but natural recovery can restore the grassland to a state closer to that prior to degradation. Grassland restoration in humid regions is generally more successful than in arid regions， while the restoration of temperate grassland is generally better than that of alpine grassland. Moderately degraded grassland provides the most obvious response to improvement activity. In the process of grassland restoration， both the biodiversity and ecosystem services can be restored， but biodiversity restoration is more successful than restoration of ecosystem services.

Key words: grassland, ecological restoration, biodiversity, ecosystem services, Meta-analysis

Xiang JIANG, Jian-xia MA. The impact of different factors on the outcomes of grassland ecological restoration to in China： A Meta-analysis[J]. Acta Prataculturae Sinica, 2021, 30(2): 14-31.

Figures/Tables 20

Fig.1 Distribution of study areas (provinces)

Fig.2 Distribution of ecological area

Fig.3 Distribution of grassland type

Fig.4 Distribution of grassland degradation

Fig.5 Methods and its number (top 5)

Fig.6 Distribution of biodiversity and ecosystem services

Fig.7 Response of recovery effect to recovery time (recovered grassland/degraded grassland)

Fig.8 Response of recovery effect to recovery time (recovered grassland/reference grassland)

Fig.9 Response of recovery methods to grassland restoration (recovered grassland/degraded grassland)

Fig.10 Response of recovery methods to grassland restoration (recovered grassland/reference grassland)

Fig.11 Response of different ecological regions to grassland restoration (recovered grassland/degraded grassland)

Fig.12 Response of different ecological regions to grassland restoration (recovered grassland/reference grassland)

Fig.13 Response of different grassland type to grassland restoration (recovered grassland/degraded grassland)

Fig.14 Response of different grassland type to grassland restoration (recovered grassland/reference grassland)

Fig.15 Response of different grassland degraded degree to grassland restoration (recovered grassland/degrade grassland)

Fig.16 Response of different grassland degraded degree to grassland restoration (recovered grassland/reference grassland)

Fig.17 Response of biodiversity to grassland restoration (recovered grassland/degraded grassland)

Fig.18 Response of biodiversity to grassland restoration (recovered grassland/reference grassland)

Fig.19 Response of ecosystem services to grassland restoration (recovered grassland/degraded grassland)

Fig.20 Response of ecosystem services to grassland restoration (recovered grassland/reference grassland)

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