Policy-driven changes in enclosure fisheries of large lakes in the Yangtze Plain: Evidence from satellite imagery

Dai, Yanhui; Feng, Lian; Hou, Xiyan; Choi, Chi‐Yeung; Liu, Junguo; Cai, Xiaobin; Shi, Lei; Zhang, Yunlin; Gibson, Luke

doi:10.1016/j.scitotenv.2019.06.179

Cited by 27 publications

(12 citation statements)

References 42 publications

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“…Thus, aquaculture has been prohibited in some eutrophic lakes and significantly constrained in others, including Lake Taihu, which is known to receive nutrient loads from agriculture that exceed those from aquaculture [52,54,61]. Regulations have been adopted to ban the fertilization of open water, confine aquaculture to certain lake zones, prohibit feeding of caged fish, and even specify the species composition of fish allowed to be grown in confinement [14,[62][63][64][65][66]. Thus, in end effect, concern for water quality has triggered not only complex interplay that mediates interference between agriculture and open aquaculture but also policies that often disadvantage aquaculture.…”

Section: Introductionmentioning

confidence: 99%

Water and Land as Shared Resources for Agriculture and Aquaculture: Insights from Asia

Pueppke

Nurtazin

2020

Water

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Although agriculture and aquaculture depend on access to increasingly scarce, shared water resources to produce food for human consumption, they are most often considered in isolation. We argue that they should be treated as integrated components of a single complex system that is prone to direct or indirect tradeoffs that should be avoided while also being amenable to synergies that should be sought. Direct tradeoffs such as competition for space or the pollution of shared water resources usually occur when the footprints of agriculture and aquaculture overlap or when the two practices coexist in close proximity to one another. Interactions can be modulated by factors such as hydropower infrastructure and short-term economic incentives, both of which are known to disrupt the balance between aquaculture and agriculture. Indirect tradeoffs, on the other hand, play out across distances, i.e., when agricultural food sources are diverted to feed animals in aquaculture. Synergies are associated with the culture of aquatic organisms in rice paddies and irrigation waters, seasonal rotations of crop cultivation with aquaculture, and various forms of integrated agriculture–aquaculture (IAA), including jitang, a highly developed variant of pond-dike IAA. Policy decisions, socioeconomic considerations, and technology warrant increased scrutiny as determinants of tradeoffs and synergies. Priority issues for the future include guiding the expansion of aquaculture from its traditional base in Asia, taking advantage of the heterogeneity that exists within both agricultural and aquaculture systems, the development of additional metrics of tradeoffs and synergies, and adapting to the effects of climate change.

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Section: Introductionmentioning

confidence: 99%

Water and Land as Shared Resources for Agriculture and Aquaculture: Insights from Asia

Pueppke

Nurtazin

2020

Water

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“…Ecological migration, compensation mechanism, and alternative livelihoods for native peoples in the Ramsar sites or national nature reserves should be enhanced for implementing returning cropland and aquaculture pond to natural wetlands [36]. The utilization of wetland resources, e.g., tourism, should be controlled, even prohibited when necessary, in the core area of Ramsar sites by legislation [37]. Ecological water supplement from reservoirs or rivers to wetlands with obvious degradation, especially the wetlands in arid and semiarid zones, is necessary for maintaining vulnerable ecosystems and biodiversity [38].…”

Section: Discussionmentioning

confidence: 99%

Remote Observations in China’s Ramsar Sites: Wetland Dynamics, Anthropogenic Threats, and Implications for Sustainable Development Goals

Mao

Wang

et al. 2021

J Remote Sens

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The Ramsar Convention on Wetlands is an international framework through which countries identify and protect important wetlands. Yet Ramsar wetlands are under substantial anthropogenic pressure worldwide, and tracking ecological change relies on multitemporal data sets. Here, we evaluated the spatial extent, temporal change, and anthropogenic threat to Ramsar wetlands at a national scale across China to determine whether their management is currently sustainable. We analyzed Landsat data to examine wetland dynamics and anthropogenic threats at the 57 Ramsar wetlands in China between 1980 and 2018. Results reveal that Ramsar sites play important roles in preventing wetland loss compared to the dramatic decline of wetlands in the surrounding areas. However, there are declines in wetland area at 18 Ramsar sites. Among those, six lost a wetland area greater than 100 km2, primarily caused by agricultural activities. Consistent expansion of anthropogenic land covers occurred within 43 (75%) Ramsar sites, and anthropogenic threats from land cover change were particularly notable in eastern China. Aquaculture pond expansion and Spartina alterniflora invasion were prominent threats to coastal Ramsar wetlands. The observations within China’s Ramsar sites, which in management regulations have higher levels of protection than other wetlands, can help track progress towards achieving United Nations Sustainable Development Goals (SDGs). The study findings suggest that further and timely actions are required to control the loss and degradation of wetland ecosystems.

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“…在中国以往的生态修复工程中, 卫星遥感技术不仅用于监测土壤侵蚀、生态环境破坏的状况 [55] , 评估退耕还林还草项目中植被的生长状况 [56] , 监测水土保持综合治理各项措施的数量和质量 [57] , 还被成功应用到水生态管理领域 [58,59] . 与地面监测相比, 卫星遥感可节省大量人力、物力和时间, 更容易获得范围广泛的监测结果 [57] .…”

Section: 发挥卫星遥感、无人机等新技术作用unclassified

Theory of stepwise ecological restoration

Liu¹,

Cui²,

Tian³

et al. 2020

Chin. Sci. Bull.

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Policy-driven changes in enclosure fisheries of large lakes in the Yangtze Plain: Evidence from satellite imagery

Cited by 27 publications

References 42 publications

Water and Land as Shared Resources for Agriculture and Aquaculture: Insights from Asia

Water and Land as Shared Resources for Agriculture and Aquaculture: Insights from Asia

Remote Observations in China’s Ramsar Sites: Wetland Dynamics, Anthropogenic Threats, and Implications for Sustainable Development Goals

Theory of stepwise ecological restoration

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