The driving mechanisms for community expansion in a restored Carex tussock wetland

Qi, Qing; Zhang, Dongjie; Tong, Shuo; Zhang, Mingye; Wang, Xuehong; An, Yu; Lü, Xianguo

doi:10.1016/j.ecolind.2020.107040

Cited by 10 publications

(16 citation statements)

References 50 publications

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“…However, field investigations showed that due to the uncertainty of the WLFs of Poyang Lake, the time of beach exposure varies, which makes the beach grow different plant communities at different elevations. However, due to the change in the hydrological situation of Poyang Lake in recent years, the growth range of C. cinerascens has changed from 15–17 m 84 , 85 to 11 m. This result is similar to Qi et al’s 86 observation that water depth affects the development and expansion of Carex appendiculate .…”

Section: Discussionsupporting

confidence: 79%

Ecological adaptability and population growth tolerance characteristics of Carex cinerascens in response to water level changes in Poyang Lake, China

Yao

Cao

Zheng

et al. 2021

Sci Rep

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Water level conditions are the key factors that affect the growth and distribution of wetland plants. Using Carex cinerascens (C. cinerascens) as the study species, we employ indoor simulations and field surveys. Our results show that C. cinerascens can adapt to rhythmic changes in the water level through different adaptation strategies. Compared to that of the control group, plant growth was better with a 0–0.4 cm/d water level rate, and plant growth was in the 42–56 cm range to that a 1.0–1.4 cm/d water level rate. Furthermore, it was observed that 0–0.4 cm/d was the most suitable growth rate, with 0.6–1.0 cm/d and 0–32 cm being the ideal plant tolerance ranges, and increasing to 1.0–1.4 cm/d and 32–56 cm exceeds the plant tolerance threshold. In the middle and late period of the experiment (25–45 d), the ecological characteristics of the plants changed significantly. For example, the root-to-shoot ratio of the plant in the stable water level reached 26.1. In our field observations, plant biomass can be influenced by a variety of environmental factors. The frequency of the species was the largest at an elevation of 15 m, and the growth status of the dominant and companion species of C. cinerascens was weakened with an increase in soil moisture content. The suitable water content for C. cinerascens growth was 27.6–57.3%, the distribution elevation was 12.54–16.59 m, and the optimum elevation was 13.56–15.54 m. The study is expected to provide a reference for wetland ecology research and wetland protection and restoration, a theoretical reference for the coordination of water resource development and utilization of Poyang Lake and ecological protection of important lakes and wetlands, and an important scientific basis for wetland hydrologic regulation, ecological restoration and biodiversity conservation.

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Section: Discussionsupporting

confidence: 79%

Ecological adaptability and population growth tolerance characteristics of Carex cinerascens in response to water level changes in Poyang Lake, China

Yao

Cao

Zheng

et al. 2021

Sci Rep

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“…in degraded wetland, and C. schmidtii tussocks were uniformly planted on the ridge at a density of 9 tussocks/m 2 in the spring of 2008 (Qi et al, 2021c;Zhang et al, 2021b), and then the area of RW was 0.08 km 2 after 10 years' natural restoration (Figure 1B). Moreover, NW (Figure 1A) without anthropogenic disturbance and DW (Figure 1C) were also selected to study the nutrient trade-off of C. schmidtii.…”

Section: Study Areamentioning

confidence: 99%

“…However, C. schmidtii tussocks are degrading on this area due to climate change and human activities (Pan et al, 2006;Zhang et al, 2019a;Qi et al, 2021b) and the management and conservation of tussock wetlands has become an urgent necessity. In recent years, with the strengthening of wetland conservation in China, many wetland restoration projects have been implemented, and comprehensive and deepening wetland restoration and protection are further developed for tussock wetlands (Guo et al, 2016;Zhang et al, 2019b;Qi et al, 2021c). Wetland restoration engineering has been conducted to restore tussocks, especially in semi-arid zones, utilizing seedbanks, transplanting rhizomes, creating microtopography, and regulating hydrological conditions (Zhang et al, 2019b;Qi et al, 2021c).…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, with the strengthening of wetland conservation in China, many wetland restoration projects have been implemented, and comprehensive and deepening wetland restoration and protection are further developed for tussock wetlands (Guo et al, 2016;Zhang et al, 2019b;Qi et al, 2021c). Wetland restoration engineering has been conducted to restore tussocks, especially in semi-arid zones, utilizing seedbanks, transplanting rhizomes, creating microtopography, and regulating hydrological conditions (Zhang et al, 2019b;Qi et al, 2021c). It is recorded that a restoration project was conducted in 2008 by planting C. schmidtii tussocks, and significant recovery effect was achieved in the initial stage of restoration project.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have advanced the understanding of eco-physiological responses and growth of C. schmidtii to environmental fluctuations (Yan et al, 2015;Zhang et al, 2019b). The structure and biodiversity of C. schmidtii community under multiple environments was also evaluated to imply the restoration of tussock wetlands (Guo et al, 2016;Qi et al, 2021c).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Wetland Restoration and Degradation on Nutrient Trade-Off of Carex schmidtii

et al. 2022

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Plant nutrient trade-off, a growth strategy, regulates nutrient stoichiometry, allocation and stoichiometric relationships, which is essential in revealing the stoichiometric mechanism of wetland plants under environmental fluctuations. Nonetheless, how wetland restoration and degradation affect nutrient trade-off of wetland plants was still unclear. In this study, field experiments were conducted to explore the dynamic of nutrient stoichiometry and nutrient limitation of Carex schmidtii under wetland restoration and degradation. Plant nutrient stoichiometry and stoichiometric relationships among natural (NW), restored (RW), and degraded (DW) tussock wetlands were examined. Results showed that nutrient stoichiometry of C. schmidtii was partly affected by wetland restoration and degradation, and growth stages. The N:P and N:K ratios indicated N-limitation for the growth of C. schmidtii. Robust stoichiometric scaling relationships were quantified between some plant nutrient concentrations and their ratios of C. schmidtii. Some N- and P-related scaling exponents are varied among NW, RW, and DW. PCA indicated that wetland restoration and degradation had significantly affected on the nutrient trade-offs of C. schmidtii (May∼August). Compared to NW, nutrient trade-off in RW was more similar to DW. Carex schmidtii had significant correlation between most nutrients and their ratios, and the SEM indicated that plant P and K concentrations had a high proportional contribution to plant C and N concentrations. Insights into these aspects are expected to contribute to a better understanding of nutrient trade-off of C. schmidtii under wetland restoration and degradation, providing invaluable information for the protection of C. schmidtii tussock wetlands.

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Simulated grazing and nitrogen addition facilitate spatial expansion of Leymus chinensis clones into saline‐alkali soil patches: Implications for Songnen grassland restoration in northeast China

Wang

Feng

et al. 2022

Land Degrad Dev

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The spatial expansion characteristic of most clonal plant species makes them produce large networks by elongating rhizomes/stolons, and occupy more physical space; thus it could contribute to restoring patchy degraded grasslands. Grazing and fertilization may affect the expansion of clonal plants, and thus can affect the vegetation recovery of degraded grassland. However, these have never been tested under field conditions. A field study was conducted from 2014 to 2019 to evaluate the effects of simulated moderate grazing (SG) and nitrogen (N) addition on spatial expansion of Leymus chinensis, a widespread clonal plant species in the eastern part of the Eurasian steppe. Results showed that SG and N addition increased the number of L. chinensis ramets (small but intact modules units of this plants and with its own roots) growing in saline‐alkali soil patches; moreover, SG increased the total rhizome length and bud density of these ramets across the years by 59% and 52%, and N addition increased them by 88% and 98%, respectively. SG and N addition also increased the community biomass of the saline‐alkali soil patches by 27% and 74%, respectively. Under SG conditions, more biomass of L. chinensis was allocated to belowground organs, and to ramets growing in saline‐alkali soil patches. The findings demonstrated that both SG and N addition improved the spatial expansion of L. chinensis from favourable patches into saline‐alkali soil patches, thereby potential ramet recruitment and vegetation reconstruction. Moderate grazing management or fertilization could improve the restoration of patchy degraded grasslands by affecting the spatial expansion of clonal plants.

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The driving mechanisms for community expansion in a restored Carex tussock wetland

Cited by 10 publications

References 50 publications

Ecological adaptability and population growth tolerance characteristics of Carex cinerascens in response to water level changes in Poyang Lake, China

Ecological adaptability and population growth tolerance characteristics of Carex cinerascens in response to water level changes in Poyang Lake, China

Effect of Wetland Restoration and Degradation on Nutrient Trade-Off of Carex schmidtii

Simulated grazing and nitrogen addition facilitate spatial expansion of Leymus chinensis clones into saline‐alkali soil patches: Implications for Songnen grassland restoration in northeast China

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