The Ecological Restoration of Heavily Degraded Saline Wetland in the Yellow River Delta

Guan, Bo; Yu, Junbao; Cao, Di; Li, Yunzhao; Mao, Peili

doi:10.1002/clen.201200569

Cited by 21 publications

(12 citation statements)

References 26 publications

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“…3 ). Table 1 showed that at the beginning of restoration in 2009 (R4), pioneer species were plants that adapted to soil of high soil salinity (such as S. salsa ) and lower water level (Dong and others 2010 ; Guan and others 2011 ), while some hygrophyte species (such as P. australis ) exhibited poor growth status (Fig. 2 ).…”

Section: Discussionmentioning

confidence: 99%

Vegetative Ecological Characteristics of Restored Reed (Phragmites australis) Wetlands in the Yellow River Delta, China

Wang

Zhou

et al. 2011

Environmental Management

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In this study, we compared ecological characteristics of wetland vegetation in a series of restoration projects that were carried out in the wetlands of Yellow River Delta. The investigated characteristics include plant composition structure, species diversity and community similarity in three kinds of Phragmites australis wetlands, i.e. restored P. australis wetlands (R1, R2, R3 and R4: restored in 2002, 2005, 2007 and 2009, respectively), natural P. australis wetland (N) and degraded P. australis wetland (D) to assess the process of wetlands restoration. The coverage of the R1 was 99%, which was similar to natural wetland. Among all studied wetlands, the highest and lowest stem density was observed in R1 and R2, respectively, Plant height and stem diameter show the same trend as N > R2 > R1 > R3 > D > R4. Species diversity of restored P. australis wetlands became closed to natural wetland. Both species richness and Shannon–Wiener index had similar tendency: increased first and then decreased with restored time. The highest species richness and species diversity were observed in R2, while the lowest values of those parameters were found in natural P. australis wetland. Similarity indexes between restored wetlands and natural wetland increased with the restoration time, but they were still less than 50%. The results indicate that the vegetation of P. australis wetlands has experienced a great improvement after several years’ restoration, and it is feasible to restored degraded P. australis wetlands by pouring fresh water into those wetlands in the Yellow River Delta. However, it is notable that costal degraded P. australis wetland in this region may take years to decades to reach the status of natural wetland.

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Section: Discussionmentioning

confidence: 99%

Vegetative Ecological Characteristics of Restored Reed (Phragmites australis) Wetlands in the Yellow River Delta, China

Wang

Zhou

et al. 2011

Environmental Management

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“…However, the coastal wetlands in the Yellow River Delta have degraded in recent years due to climate change such as increasing temperature and human disruptions such as drainage ( Cong et al, 2019 ). Consequently, the soil salinity has increased in these degraded wetlands ( Guan et al, 2013 ). Given the observed salt tolerance of the common reed, this plant could serve an important role in the ecological restoration of wetlands in this region.…”

Section: Introductionmentioning

confidence: 99%

Differentially expressed genes related to oxidoreductase activity and glutathione metabolism underlying the adaptation of Phragmites australis from the salt marsh in the Yellow River Delta, China

Zhang

Chen

Feng

et al. 2020

PeerJ

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The common reed (Phragmites australis) is a dominant species in the coastal wetlands of the Chinese Yellow River Delta, where it tolerates a wide range of salinity. Recent environmental changes have led to the increase of soil salinity in this region, which has degraded much of the local vegetation. Clones of common reeds from the tidal marsh may have adapted to local high salinity habitat through selection on genes and metabolic pathways conferring salt tolerance. This study aims to reveal molecular mechanisms underlying salt tolerance in the tidal reed by comparing them to the salt-sensitive freshwater reed under salt stress. We employed comparative transcriptomics to reveal the differentially expressed genes (DEGs) between these two types of common reeds under different salinity conditions. The results showed that only three co-expressed genes were up-regulated and one co-expressed gene was down-regulated between the two reed types. On the other hand, 1,371 DEGs were exclusively up-regulated and 285 DEGs were exclusively down-regulated in the tidal reed compared to the control, while 115 DEGs were exclusively up-regulated and 118 DEGs were exclusively down-regulated in the freshwater reed compared to the control. From the pattern of enrichment of transcripts involved in salinity response, the tidal reed was more active and efficient in scavenging reactive oxygen species (ROS) than the freshwater reed, with the tidal reed showing significantly higher gene expression in oxidoreductase activity. Furthermore, when the reeds were exposed to salt stress, transcripts encoding glutathione metabolism were up-regulated in the tidal reed but not in the freshwater reed. DEGs related to encoding glutathione reductase (GR), glucose-6-phosphate 1-dehydrogenase (G6PDH), 6-phosphogluconate dehydrogenase (6PD), glutathione S-transferase (GST) and L-ascorbate peroxidase (LAP) were revealed as especially highly differentially regulated and therefore represented candidate genes that could be cloned into plants to improve salt tolerance. Overall, more genes were up-regulated in the tidal reed than in the freshwater reed from the Yellow River Delta when under salt stress. The tidal reed efficiently resisted salt stress by up-regulating genes encoding for oxidoreductase activity and glutathione metabolism. We suggest that this type of common reed could be extremely useful in the ecological restoration of degraded, high salinity coastal wetlands in priority.

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“…Spartina alterniflora was introduced in certain areas in China to accelerate sedimentation and land formation . The sulfur composition of soil or sediment is related to pore‐water sulfur chemistry governed by salinity, hydrology, pH, and season.…”

Section: Discussionmentioning

confidence: 99%

High Soil Sulfur Promotes Invasion of Exotic Spartina alterniflora into Native Phragmites australis Marsh

Xia

Yang

Zhao

et al. 2014

CLEAN Soil Air Water

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Sulfur plays an important role in plant physiological processes functioning as one of the macro‐elements, but high soil sulfur is toxic to most of the plants. Exotic Spartina alterniflora, a blacklist invasive species in China, actively accumulates and stores sulfur in their tissues leading to high sulfide concentration in the invaded environment. Spartina alterniflora might be using high sulfur as a chemical tool in successful competition with indigenous species as e.g., Phragmites australis. As the supply of sulfur increases due to acid rain and rising sea levels, plant invasions will likely become more problematic around the world.

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The Ecological Restoration of Heavily Degraded Saline Wetland in the Yellow River Delta

Cited by 21 publications

References 26 publications

Vegetative Ecological Characteristics of Restored Reed (Phragmites australis) Wetlands in the Yellow River Delta, China

Vegetative Ecological Characteristics of Restored Reed (Phragmites australis) Wetlands in the Yellow River Delta, China

Differentially expressed genes related to oxidoreductase activity and glutathione metabolism underlying the adaptation of Phragmites australis from the salt marsh in the Yellow River Delta, China

High Soil Sulfur Promotes Invasion of Exotic Spartina alterniflora into Native Phragmites australis Marsh

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