Retraction of invasive<i>Spartina alterniflora</i>and its effect on the habitat loss of endangered migratory bird species and their decline in YNNR using remote sensing technology

Okoye, Onyedikachi Kingsley; Li, Huan; Gong, Zheng

doi:10.1002/ece3.6971

Cited by 17 publications

(9 citation statements)

References 99 publications

(115 reference statements)

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“…For most waterbirds, S. alterniflora restricts their activities and food availability, so the spread of S. alterniflora has a negative impact on waterbird abundance and diversity (Gan et al 2009). In Yancheng, Jiangsu, China, due to the invasion of S. alterniflora , Red‐crowned Cranes ( Grus japonensis ) have lost 80% of their suitable habitat, and their abundances have fallen sharply (Okoye et al 2020). In the United Kingdom, the abundance of Dunlin ( Calidris alpina ) wintering in the British Isles was reduced sharply in areas where Spartina anglica had expanded (Goss‐Custard & Moser 1988).…”

Section: Discussionmentioning

confidence: 99%

The effect of Spartina alterniflora eradication on waterbirds and benthic organisms

Lyu,

Zhang,

Ren

et al. 2023

Restoration Ecology

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There has been an increasing number of coastal restoration projects to eradicate Smooth cordgrass (Spartina alterniflora) and restore bare tidal flats to conserve waterbirds. However, the evidence for the assumed benefits to waterbirds and benthic organisms after such restoration efforts remains limited. We evaluated the impact of S. alterniflora eradication on waterbirds and benthic organisms in southern China. We deployed time‐lapse cameras and satellite trackers to quantify and compare the occurrence frequency and habitat use of birds in different habitats. We compared the density and biomass of benthic organisms collected in bare tidal flats and areas where S. alterniflora had been eradicated. We found that almost all waterbirds, except gulls, avoided areas where S. alterniflora was present. Once S. alterniflora was eradicated, the species richness and species‐level diversity of shorebirds and waterbirds did not differ significantly from those of the bare tidal flats. At least 9 out of 14 tracked individual shorebirds used areas where S. alterniflora had been eradicated, with Common Redshank (Tringa totanus) demonstrating a clear preference for such habitat. The density and biomass of benthos in deeper sediments (5–20 cm below the surface) were significantly lower in areas where S. alterniflora had been eradicated than in bare tidal flats, indicating that the food resources for birds may take longer than 1 year to recover. This research demonstrates that the eradication of S. alterniflora is important for the restoration of waterbird habitats, and such efforts should be made in areas that are important to waterbirds.

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Section: Discussionmentioning

confidence: 99%

The effect of Spartina alterniflora eradication on waterbirds and benthic organisms

Lyu,

Zhang,

Ren

et al. 2023

Restoration Ecology

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“…It comprises offshore mud-flats and multiple onshore habitats. From the coast to the inland in the core zone, tidal flats dominated by smooth cordgrass (Spartina alterniflora), common seepweed (Suaeda glauca), and reeds (Phragmites australis) are distributed in a stratified pattern (Li et al, 2019;Okoye et al, 2020). The water depth in this area can be controlled using sluice gates connected to the rivers.…”

Section: Study Sitementioning

confidence: 99%

Habitat utilization of the Eurasian spoonbill (Platalea leucorodia) wintering in the Yancheng National Nature Reserve: relative importance of artificial habitats

Xu,

Mao,

Zhang

et al. 2024

Front. Ecol. Evol.

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Coastal wetlands are among the most modified habitats because of the loss and degradation of tidal flats, resulting in a rapid decline in waterbirds migrating along flyways. Understanding the relative importance of multiple types of wetlands as habitats for waterbirds and the factors influencing their utilization could improve management effectiveness. During the wintering seasons of 2021-2022 and 2022-2023, we documented the distribution of Eurasian spoonbills (Platalea leucorodia), a wetland specialist, in the Yancheng National Nature Reserve (YNNR) and quantified the surrounding environments as influencing factors to assess the relationship between their habitat use patterns and environmental characteristics. Our results showed that spoonbills inhabit common seepweed (Suaeda glauca) marshes, reed (Phragmites australis) ponds, aquaculture ponds, and agricultural channels. Although natural wetlands supported a greater number of spoonbills in the YNNR, spoonbills were able to forage in artificial wetlands. The environmental features where the spoonbills were distributed were found to influence their habitat use, and the most important factor was water depth, followed by species richness and vegetation cover. These results demonstrated that spoonbills rely on both natural and artificial wetlands in the core and buffer zones of the YNNR. Our research thus underlined that conservation interventions of natural and artificial wetlands, such as controlling the water depth and diminishing human activities, might maximize the effects of total conservation outcomes for the Eurasian spoonbills, as well as for various coastal waterbirds with similar ecological requirements.

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“…However, its introduction to China as an exotic and invasive species results in a starkly dissimilar community structure and function compared to its native habitat. Nutrient structure, biodiversity of the benthic community, and metrics of several biological indicators have been severely affected by the invasion of this species [ 49 ]. Nonetheless, the production and habitat for SA in China are currently in the initial stages.…”

Section: Spatiotemporal Distribution Of Spartina Alterniflo...mentioning

confidence: 99%

Impact of Spartina alterniflora Invasion in Coastal Wetlands of China: Boon or Bane?

Zheng,

Javed,

Liu

et al. 2023

Biology

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Invasive plants, like Spartina alterniflora (SA), have a competitive advantage over native flora due to their rapid utilization of vital soil nutrients. This results in the depletion of resources for native plant species, significantly impacting ecosystem diversity and stability. This comprehensive review addresses several key aspects related to SA’s spread and spatial distribution in China’s wetlands. The rapid expansion of Spartina alterniflora is attributed to its high reproductive ability, adaptability to environmental factors like elevated salinity, and ability to disperse its seeds via tides. Spartina alterniflora mainly were found in Zhejiang, Jiangsu, Fujian, and Shanghai provinces, accounting for more than 90% of China’s total Spartina alterniflora area. Spartina alterniflora rapid growth results in displacement of native species and loss of vital microbial, plant, and animal diversity. Some studies reported that Spartina alterniflora increases carbon storage, while others argue that it weakens this function. The impact of Spartina alterniflora on organic and inorganic carbon requires further research for better understanding dynamics of carbon in coastal wetlands. The controlled growth of Spartina alterniflora can be beneficial in many aspects of the coastal wetlands’ ecosystem. In China, various methods have been employed to control the invasion of SA. Physical control, such as removing the plants and converting them into fertilizer or bioenergy, has been commonly used but has limitations like air pollution and the potential for re-invasion. Chemical herbicides like Imazapyr and Haloxyfop-R-methyl have effectively controlled and prevented re-invasion in specific areas, but their potential adverse impacts are still uncertain. Wetland Park construction, aquaculture development, and substituting native or exotic species with mangroves or reed communities have also been successful. It becomes evident that a long-standing and Contextual approach is necessary to effectively manage the advantages and curtail the drawbacks associated with S. alterniflora across China.

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Retraction of invasiveSpartina alternifloraand its effect on the habitat loss of endangered migratory bird species and their decline in YNNR using remote sensing technology

Cited by 17 publications

References 99 publications

The effect of Spartina alterniflora eradication on waterbirds and benthic organisms

The effect of Spartina alterniflora eradication on waterbirds and benthic organisms

Habitat utilization of the Eurasian spoonbill (Platalea leucorodia) wintering in the Yancheng National Nature Reserve: relative importance of artificial habitats

Impact of Spartina alterniflora Invasion in Coastal Wetlands of China: Boon or Bane?

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