Spatial pattern of plant diversity in a group of uninhabited islands from the perspectives of island and site scales

Chi, Yuan; Sun, Jingkuan; Fu, Zhanyong; Xie, Zhenghui

doi:10.1016/j.scitotenv.2019.01.352

Cited by 22 publications

(38 citation statements)

References 64 publications

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“…The results of this study can provide information about inter‐species relations and plant responses to environmental stresses (Omelko et al, 2018; Xu et al, 2020). Different spatial structures were also linked to different ecological functions, such as biodiversity (Ahmad et al, 2020; Chi, Sun, Fu, & Xie, 2019), water yield (Liu et al, 2018), productivity (Wang et al, 2019; Wang et al, 2020), and micro‐scale atmosphere conditions (Abdi, Hami, & Zarehaghi, 2020; Liu et al, 2016). Traditional quantitative ecology has utilized the two‐dimensional (usually on the horizontal direction) coordination of individuals to parameterize the structure (Omelko et al, 2018); however, in this current study, the researchers opted to use a three‐dimensional parameter, structure complexity index (SCI), based on the coordination and heights of individuals.…”

Section: Discussionmentioning

confidence: 99%

A threshold‐like effect on the interaction between hydrological connectivity and dominant plant population in tidal marsh wetlands

Liu

Xie

et al. 2021

Land Degrad Dev

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Tidal marsh wetlands in the Yellow River Delta provide valuable eco‐services to the local population and global ecology. However, this area is suffering from serious degradation under the stresses of social development and climate change. Hydrological connectivity, a new framework in hydrology and ecology, has been proposed as the main factor affecting the ecological processes in coastal wetlands; however, its role in hydrology–soil–vegetation interactions remains unclear. In this study, we parametrically quantified the hydrological connectivity in the tidal marsh wetlands and analyzed its relationship with Phragmites australis, one of the dominant species in this area. Our results showed threshold‐like effects on the interaction between hydrological connectivity and P. australis on the plot scale. When biomass is lower than 2.2 kg m−2, the population density and structure size were found to increase with hydrological connectivity. When the biomass is higher than the threshold, the plots disconnected hydrologically because of high water consumption. Compared with soil chemistry, salinity, and water soil content, hydrological connectivity in the surface soil layer is more strongly linked to the plant traits and spatial structure in the tidal marsh wetlands due to the narrow ranges of other variables. Based on the Best on previous study and our analysis, we do not recommend dense plantation of P. australis, especially near the freshwater sources in the tidal marsh, because of its high reproduction ability and competitive nature, which may cut the freshwater connectivity off, lowering the richness of plant species and habitat diversity.

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Section: Discussionmentioning

confidence: 99%

A threshold‐like effect on the interaction between hydrological connectivity and dominant plant population in tidal marsh wetlands

Liu

Xie

et al. 2021

Land Degrad Dev

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“…At genus level, the similarity of common genera could still be observed, i.e., Polygonum was the common genus in the three regions. At species level, the species lists were generally identical because of the close geographical position and frequent species communication (Chi et al, 2019a). However, species endemic to the study area existed due to the unique natural conditions of the sandy and rocky islands.…”

Section: Contributions Of Different Factors To the Spatial Patternmentioning

confidence: 96%

“…The shape was represented using an island shape index (ISI), whose detailed calculation method was shown in Chi et al (2019a) and a higher ISI indicates a more complex shape. In previous studies on island ecology, the PTM was always measured using the distance to the mainland because the studied islands were not connected with the mainland (Panitsa et al, 2006;Sfenthourakis and Panitsa, 2012;Triantis et al, 2012;Chi et al, 2019a). In this study, the bridges connected the islands with the mainland and different islands in a chain pattern, and the accessibility of island was determined by the order along the bridge from the mainland.…”

Section: Vegetation-soil Systemmentioning

confidence: 99%

“…Vegetation and soil constitute the main body of island surface and are essential to the island ecosystem (Chi et al, 2017;Hattermann et al, 2018). The vegetation is the main producer and generates the fundamental material and energy for the other member in the island ecosystem; it represents the vitality and stability of the ecosystem and functions for biodiversity maintenance, habitat provision, freshwater conservation, wind pretention, soil xation, and visual landscape (Chang et al, 2013;Médail et al, 2017;Borges et al, 2018;Chi et al, 2019a). The soil denotes the base of the island ecosystem; it provides the space, water, and nutrients for the survival and living of different types of organisms and involves various biogeochemical cycles (Ouyang et al, 1999;Grimm et al, 2008;Chi et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…The soil denotes the base of the island ecosystem; it provides the space, water, and nutrients for the survival and living of different types of organisms and involves various biogeochemical cycles (Ouyang et al, 1999;Grimm et al, 2008;Chi et al, 2018). The vegetation and soil are closely interrelated and interacted and they generally positively in uence one another, thereby forming a vegetation-soil system (Li et al, 2018;Chi et al, 2019a). Meanwhile, the vegetation-soil system exhibits distinct spatial heterogeneity across islands and within an island due to different natural and anthropogenic factors (…”

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confidence: 99%

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Spatial Responses of Vegetation-Soil System to Complex Factors in a Sandy-Rocky Island Chain

Chi¹,

Xie²

2021

Preprint

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The vegetation-soil system is fundamental to island ecosystem and changes considerably across sandy and rocky islands due to different natural and anthropogenic factors. An island chain, which is characterized by the coexistence of sandy and rocky islands, the connection of the islands by bridges, and complex influencing factors, was used as the study area. The vegetation-soil system was represented using different indicators and three newly-proposed indices, namely, vegetation health index (VHI), soil health index (SHI), and vegetation-soil system health index (VSSHI). The complex factors were identified in aspects of island basic factors, landscape pattern, terrain condition, and ecological indices. Then, the spatial responses of the system to the factors were analyzed at island and site scales. Results indicated that the vegetation-soil system showed similar and different responses to the complex factors across the dual scales. The similarity was represented by the higher sensitivities of VHI and VSSHI compared with that of SHI at both scales, and the difference mainly indicated that the influences of landscape pattern factors distinctly decreased along the scales from island to site. Island area, sea reclamation proportion, vegetation proportion, and natural ecosystem damaged index were the most important factors at island scale, while the ecological indices showed the highest influences at site scale. The study revealed the spatial characteristics of the vegetation-soil system across different types of islands, clarified the spatial responses of the system to complex factors at the dual scales, and identified the main influencing factors of the system.

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On the relative importance of landscape variables to plant diversity and phylogenetic community structure on uninhabited islands, South Korea

Kim

Lee

2020

Landscape Ecol

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Spatial pattern of plant diversity in a group of uninhabited islands from the perspectives of island and site scales

Cited by 22 publications

References 64 publications

A threshold‐like effect on the interaction between hydrological connectivity and dominant plant population in tidal marsh wetlands

A threshold‐like effect on the interaction between hydrological connectivity and dominant plant population in tidal marsh wetlands

Spatial Responses of Vegetation-Soil System to Complex Factors in a Sandy-Rocky Island Chain

On the relative importance of landscape variables to plant diversity and phylogenetic community structure on uninhabited islands, South Korea

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