Through greenhouse simulation control experiments, the effects of different water level gradient treatments on the morphological traits, clonal growth traits, biomass accumulation and biomass distribution pattern of the declining population of the exotic clonal plant Spartina anglica were studied. A total of 5 water level treatments were set up in the experiment, namely submerged to 1/2 of the Spartina plant height, submerged to 1/3 of the plant height, surface water submerged 0cm, 5cm below the soil surface (-5cm), and below the soil surface. 10cm(-10cm). The results show that water level gradient has a significant impact on some indicators such as morphological traits, clone growth traits, biomass accumulation and distribution pattern of Spartina (p<0.05); plant height, number of clone ramets, number of rhizome nodes, root The total stem length, spacer length and biomass under the water level gradient treatment from 0cm to 1/3 plant height were significantly higher than those under the -10cm and 1/2 plant height water level treatments (p<0.05), but there was no significant difference from the -5cm treatment. (p>0.05); the above-ground biomass distribution and rhizome biomass distribution of the -10cm water level treatment were significantly lower than those of other treatments (p<0.05). Based on the morphological characteristics, clonal growth characteristics, biomass accumulation and distribution pattern of declining Spartina populations in response to water level treatment, it is believed that a more suitable water level gradient for Spartina populations is from surface water to 1/3 of the submerged plant height, and the water level The changes may be one of the reasons for the natural decline of Spartina populations.

Introduction to Environmental Conservation and Study Objectives

The study of ecological dynamics and the preservation of biodiversity are paramount in the contemporary discourse on environmental conservation. This post delves into groundbreaking research concerning the declining population of the exotic clonal plant, *Spartina anglica*, through the lens of greenhouse simulation control experiments. These experiments aimed to unravel the impact of varied water level gradients on the morphological and clonal growth traits, alongside biomass accumulation and distribution patterns of *Spartina anglica*.

Ecological Significance of Spartina anglica

Spartina anglica is a species of considerable ecological significance, serving not only as a vital component of coastal ecosystems but also playing a crucial role in shore protection and sediment stabilization. However, its declining populations in certain habitats necessitate a thorough understanding of the factors influencing its growth and sustainability.

Experimental Design and Water Level Treatments

The experimental design incorporated five distinct water level treatments to simulate various environmental conditions. These treatments ranged from submersion to half and a third of the plant’s height, to levels at and below the soil surface, specifically at 0cm, -5cm, and -10cm. This gradient approach provided a comprehensive insight into how different water availabilities could affect the plant’s vitality and development.

Impact of Water Levels on Growth Indicators

Key findings from this study revealed a significant correlation between water level gradients and several growth indicators of *Spartina anglica* (p<0.05). Notably, parameters such as plant height, number of clone ramets, number of rhizome nodes, total stem length, spacer length, and overall biomass exhibited substantial enhancement in treatments where the water level ranged from the surface to 1/3 of the plant height. These outcomes were significantly superior compared to those observed in the -10cm and half the plant height submersion treatments. However, the results from the -5cm water level treatment did not significantly diverge from this pattern, indicating a nuanced threshold for optimal water availability.

Optimal Conditions for Spartina anglica and Conservation Implications

Moreover, the study illuminated the critical role of water levels in determining the biomass distribution within the plant, with the -10cm treatment showcasing notably lower above-ground and rhizome biomass compared to other treatments. This differential biomass distribution underscores the complex interplay between environmental conditions and plant physiological responses.

The implications of these findings are profound, suggesting that the natural decline of *Spartina anglica* populations in certain areas could be intricately linked to changes in water level gradients. For conservationists and environmental managers, these insights offer a tangible pathway to mitigating the decline of this species through the strategic management of water levels, thereby promoting healthier ecosystems.

Conclusion and Implications for Biodiversity Conservation

This research not only enhances our understanding of *Spartina anglica*’s ecological dynamics but also contributes to the broader narrative of environmental conservation and species preservation. By elucidating the optimal conditions for the growth and sustenance of this plant, the study paves the way for more informed conservation strategies that align with the natural preferences of *Spartina anglica*, ultimately fostering biodiversity and ecological resilience.

For futher details of this article and research, feel free to contact our team for assistance.

Original research was done by Li Hongli, Zhi Yingbiao, Lei Guangchun, Zhao Lei, An Shuqing*, Deng Zizi, Zhou Changfang, Xu Guiming

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