Abstract
Understanding the effect of soil salinity on the diversity and species distribution of plant communities in inland salt marsh ecosystems could provide solutions for the management of regional saline soils and the protection of salt marsh wetland vegetation. A field experiment in succulent halophyte, Carex, and gramineous grass habitats in Ordos, Inner Mongolia (northwest China) was conducted to study the diversity and composition of plants in different saline habitats in inland salt marsh ecosystems. Results showed that plant diversity and species richness in the Carex habitat were significantly higher than the succulent halophyte habitat and the gramineous grass habitat (P < 0.05). Further, species abundance was higher in the succulent halophyte habitat and the Carex habitat than the gramineous grass habitat. Similar results were obtained when considering the abundance of constructive species. No significant differences in the abundance of dominant species and companion species between the gramineous grass habitat and the Carex habitat were found. We concluded that species abundance, species richness, species distribution, and plant diversity together explained the response of plant communities in different habitats to soil salinity, especially Na+ and SO42−. This highlights the importance of soil salinity for the maintenance of plant diversity and structural composition in inland salt marsh ecosystems.
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Introduction
The groundwater level in inland salt marsh wetlands is low (El-Ghani et al. 2014), increasing the biodiversity in these areas under severe environmental conditions (Myers et al. 2000). Inland salt marsh wetlands play an important role in hydrological cycling (Craft 2016), regulating regional climate, carbon sequestration, and biogeochemical cycling (Brevik et al. 2015; Keesstra et al. 2012; Köchy et al. 2015; Mclaughlin and Cohen 2013). Inland salt marsh wetlands in arid and semi-arid regions have an effective role in promoting species richness; the plant communities of wetlands also increase landscape-level diversity (Minggagud and Yang 2013).
The salinity of soil and water in inland salt marshes is strongly affected by climatic conditions, as well as the chemical characteristics of groundwater (Li et al. 2020). Halophytic species are the dominant species in these habitats (Eallonardo and Leopold 2014). The plant communities that are present in close proximity to salt marshes are characterized by a “patchy” structure, i.e., different species or one species with different levels of growth exist(s) in each “patch”. Some studies have found that, on a local scale, soil factors have a greater effect on plant distribution than climactic factors do (Álvarez et al. 2001; Griffiths 2006), owing to the adaptability of the formation of their living environment (Burchill and Kenkel 1991). Halophyte plant communities are effective indicators of soil salinity and are largely determined by physical and chemical characteristics of the soil (Contreras-Cruzado et al. 2017). The structure and composition of plant communities are determined by abiotic factors such as soil characteristics and biotic factors such as interspecific competition (Nargis et al. 2010). The survival rates of plant species and consequently their distribution patterns depend on soil factors (He et al. 2009). Soil salinity and moisture affect the distribution of plants in wetlands (Eallonardo and Leopold 2014; El-Ghani et al. 2014; Kargar et al. 2012; Koull and Chehma 2015; Minggagud and Yang 2013). The hydropedology and geomorphology of the habitat determines the variability of soil salinity and other features (Biggs et al. 2010). Plant communities around inland salt marshes generally form an obvious regional distribution, with salt-tolerant species being fixedly distributed where high soil salinity occurs (Bueno et al. 2020; Viswanathan et al. 2020). Insufficient attention has been paid to inland salt marshes, and there are fewer related studies on inland salt marshes than on coastal salt marshes (Apaydin et al. 2009; Fan et al. 2011; Lv et al. 2013; Zhang et al. 2013).
The Ordos plateau is the second largest saline-alkali lake distribution area in China. The inland salt marshes within the lake area have significant dynamics and play important ecological functions (El-Ghani et al. 2014). The area also supplies resources for the salt chemical and grazing industries in the region. The effects of climate change and anthropogenic activities have resulted in the phenomenon of fragmentation, and “patching” of salt marshes is particularly prominent in the semi-arid inland areas (Fan et al. 2011; Lv et al. 2013).
The objectives of this study were (1) to characterize the soil salinity and plant communities’ composition in inland salt marshes of Ordos, Inner Mongolia; (2) to reveal the relationship between soil salinity and plant communities; (3) to provide a scientific basis for the protection and rational use of salt marsh wetland resources in the region. We hypothesized that the different concentrations of soil salinity would play a key role in the composition of plant communities, plant diversity, and species distribution. Thus, we studied the species abundance, species richness, species distribution, and Shannon index across three different habitats with varying levels of salinity. However, we did not consider seasonal vegetation changes.
Materials and methods
Study area
The study was conducted in the Ordos plateau of Inner Mongolia (NW China) (Fig. 1). The altitude of this region is 1100–1700 m above sea level, where the climate is considered “semi-arid continental”. The winter climate is dry and cold, with high average temperatures in summer; however, there are considerable temperature differences between day and night. The annual mean temperature is 6.2 °C, with a daily maximum temperature of 38 °C and a daily minimum temperature of − 31.4 °C. Annual mean precipitation is 348.3 mm, with the majority of rainfall concentrated in summer, accounting for 70% of the precipitation for the year. Annual mean evaporation is 2506.3 mm. Northwest wind prevails throughout the year; the mean annual wind velocity is 3.6 m s−1. The soil type is predominantly meadow soil.
There are many salt marshes distributed in the basins of the interior drainage area in the Ordos Plateau, and vegetation rings around water on lake beaches, such as halophyte plant communities. Halophyte plant communities are clearly distinguished from other community types; as a result of the isolation in their landscape, halophyte habitats have higher species richness and wetland beta diversity than other habitat types (Minggagud and Yang 2013). This research mainly studied the soil and salinized plant communities around salt marshes. Halophyte plant communities can be divided into succulent halophyte, Carex, and gramineous grass habitats. The plant species recorded were classified into three groups: (1) constructive species (the dominant biological species with the advantages of having the largest coverage and occupying the largest space, thereby playing the most prominent role in the construction of communities and the transformation of the environment) (Zhao et al. 2019), (2) dominant species (the biological species with the largest number of individuals in each layer of the community, large biomass, large branches, and leaves covering the ground, strong living ability, and significant effect on the habitat) (Huang et al. 2018), and (3) companion species (other minor species in the community) (Yang et al. 2019).
The selected plots of the three types of habitats, distributed representatively throughout the area, met the following conditions: (1) they were not influenced by human activities; (2) they were located close to the edge of salt marshes, as this is where halophytic vegetation is primarily distributed; and (3) they represented the typicality of the respective habitat. The three selected habitats represented the distribution characteristics of vegetation under different salt conditions in the salt marsh wetlands. The habitat characteristics of these three community types were markedly different, and the different vegetation types were reflective of the habitat soil characteristics. From the distribution of plant communities in three typical habitats, the content, type, and distribution of soil salinity in different regions of the study area could be explored, which is useful for regional saline soil management and salt marsh wetland restoration. Restoration prevents the degradation of wetlands, maintains the stability of ecosystems, and enables them to perform their ecological functions.
Experimental design
In June of 2019, three habitat types were selected as sampling sites, corresponding to the succulent halophyte habitat, the Carex habitat, and the gramineous grass habitat. In each habitat, there were six sampling plots, each plot having an area of 50 m × 50 m. The distance between any two plots was > 200 m, from edge to edge. Within each plot, three sampling points were set up at random. In total, there were 54 sampling points (3 sampling points per plot × 6 replicates plots × 3 habitats).
Collection of samples
At each sampling point, one 1 m × 1 m quadrat was set up to determine the composition of the plant community. Plant abundance (the number of plants in each quadrat) and plant richness (the number of plant species in each quadrat) were determined. In addition, soil at a depth of 0–20 cm (The soil layer at this depth is the rhizosphere soil, which is the area where plants are most sensitive to changes in the soil microenvironment) (Hou et al. 2019), was taken using a soil auger at the three sampling points per plot and mixed thoroughly to form a single composition sample for the soil physicochemical analyses (Gonzalez-Alcaraz et al. 2014).
Determination of soil properties
Soil moisture (SM) was measured by heating samples at 104 °C until a constant weight was reached. Soil pH was determined using a pH meter (PHS-3G, China) with a 1:5 soil–water ratio. Soil electrical conductivity (EC) was measured using a conductivity instrument (DDSJ-308F, China) with a 1:5 soil–water ratio (Aubert 1978). Na+, K+, Mg2+, Ca2+, Cl−, and SO42− levels were quantified using an ionic chromatographer (CIC-D100, China); CO32− and HCO3− were determined by titration with H2SO4 (AFNOR 1999). The determination of ion concentration is important for assessing soil salinity.
Data analysis
The plant community characteristics studied were: (1) abundance; (2) richness; (3) Shannon index (to represent plant diversity). The Shannon index was calculated according to the following formula (Shannon and Weaver 1950):
where Pi is the relative abundance of the ith taxon.
A one-way analysis of variance (ANOVA), followed by LSD testing at the 95% confidence level, was used to compare the differences in the environmental factors among the three habitats. We used the Shapiro–Wilk test to check normality of residual, and Levene’s tests to check homogeneity of variance, when the residual was not normally distributed, the Kruskal–Wallis non-parametric test was performed (Coleman 2008). All variances passed the normality and homogeneity tests before the ANOVA analyses. Pearson correlations and the Mantel test were used to identify any relationships between plant communities and environmental factors. The R v3.6.2 software program was used to run the above analyses.
The data were analyzed first via detrended correspondence analysis (DCA, length of gradient = 4.002), which recommended that canonical correspondence analysis (CCA) would be an appropriate approach (length of gradient > 4). Partial CCA and the Monte Carlo permutation test were used to determine the conditional effect of soil EC with other environmental variables as covariates; likewise, for SM content, with the rest of the variables as covariates. The DCA, CCA, and partial CCA were each carried out using CANOCO software for Windows 4.5.
Results
Soil characteristics
The soil EC (F = 17.48, P < 0.001) and Na+ concentration (F = 21.73, P < 0.001) were ranked as follows: the succulent halophyte habitat > the gramineous grass habitat > the Carex habitat. The soil K+ (F = 3.46, P = 0.039), Cl− (F = 12.56, P < 0.001), and SO42− (F = 9.20, P < 0.001) concentrations were significantly higher in the succulent halophyte habitat than in the Carex habitat by 0.06 g kg–1, 2.50 g kg–1, and 2.93 g kg–1, respectively; the gramineous grass habitat presented intermediate values. The soil Ca2+ (F = 9.04, P < 0.001) and CO32− (F = 3.56, P = 0.036) concentrations were significantly higher in the gramineous grass habitat than in the Carex habitat by 0.47 g kg–1 and 0.03 g kg–1, respectively, with the succulent halophyte habitat having intermediate values. The SM (F = 8.01, P = 0.001) was significantly higher in the Carex habitat and succulent halophyte habitat than in the gramineous grass habitat by 18.82% and 6.33%, respectively. However, no significant differences in the soil pH or Mg2+ concentration were detected among the three habitats (Fig. 2).
Vegetation characteristics
In the three types of salinized habitat a total of 28 plant species were collected. Within these species, 8 were recorded in the succulent halophyte habitat, 14 in the Carex habitat, and 21 in the gramineous grass habitat. The abundance (F = 9.06, P < 0.001) in the Carex habitat was significantly higher than in the gramineous grass habitat and the succulent halophyte habitat by 524 and 346, respectively. The richness (F = 25.62, P < 0.001) was significantly lower in the succulent halophyte habitat than in the gramineous grass habitat and the Carex habitat by 3.78 and 3.67, respectively. The Shannon index (F = 15.95, P < 0.001) was significantly lower in the succulent halophyte habitat than in the gramineous grass habitat and the Carex habitat by 0.70 and 0.54, respectively (Fig. 3).
The abundance (F = 8.65, P = 0.001) of constructive species in the gramineous grass habitat was significantly lower than in the Carex habitat and the succulent halophyte habitat by 476.05 and 297.14, respectively. The abundance of dominant species in the Carex habitat (F = 5.34, P = 0.008) was significantly higher than in the succulent halophyte habitat by 87.45, the gramineous grass habitat presented intermediate values. The abundance of companion species in the succulent halophyte habitat was significantly lower than in the Carex habitat and the gramineous grass habitat by 60.17 and 63.33, respectively (F = 3.45, P = 0.039) (Fig. 4).
This showed that abundance took the order of constructive species > dominant species > companion species in the succulent halophyte and the Carex habitats, but shifted to a ranking of companion species > dominant species > constructive species in the gramineous grass habitat (Table S1).
Relationship between soil conditions and species distribution
The Mantel test revealed that species distribution was significantly affected by soil salinity (Fig. 5). Pearson correlations showed that the total abundance and abundance of constructive species had a positive correlation with SM but a negative correlation with EC, Na+, K+, Cl− and SO42− and that the abundance of constructive species was negatively correlated with Ca2+. The richness and abundance of dominant species had a negative correlation with EC, Na+, Cl− and SO42− but was positively correlated with HCO3−. The Shannon index of plant communities had a negative correlation with Na+ and SO42−. Notably, there were no significant correlations between the abundance of companion species and any of the examined environmental factors.
CCA analysis showed that the 11 soil factors fully explained 100% variance, axis 1 explained 80.2%, and axis 2 explained 68.7% of the total variation (Fig. 5). Under the Monte Carlo permutation test, Na+ (F = 5.00, P = 0.002), pH (F = 3.66, P = 0.002), Ca2+ (F = 3.64, P = 0.002), SM (F = 3.35, P = 0.002), SO42− (F = 3.12, P = 0.002), Mg2+ (F = 2.74, P = 0.004), HCO3− (F = 2.33, P = 0.010), EC (F = 2.39, P = 0.014), and Cl− (F = 2.29, P = 0.006) were found to be significant environmental variables, accounting for 18.68%, 9.63%, 6.29%, 6.78%, 10.78%, 3.14%, 8.19%, 12.98% and 12.31% of the total variance, respectively (Table S2). The remaining two variables (K+ and CO32−) were not found to be significant, accounting for 11.22% of the variance that is unexplained (Table S2). Finally, CCA showed a clear separation of sample points (Fig. 6), in which the three habitats were clearly divided into three groups in ordination space: (1) succulent halophyte habitat, (2) Carex habitat, and (3) gramineous grass habitat.
Discussion
Our field study indicated that the plant communities showed high variation in different saline habitats, according to their Shannon index, richness, abundance (Fig. 3) and the abundance of constructive species, dominant species, and companion species (Fig. 4). The correlation results showed that the three community indices and the abundance of constructive species and dominant species showed significant negative correlation with soil salinity factors, especially Na+ and SO42− (Fig. 5). Soil salinity is closely related to the distribution of species types; therefore, species can be considered effective indicators of salinity in different habitats (Veldkornet et al. 2016).
The Carex habitat was composed of species with high levels of SM and low salinity. The abundance of communities was significantly higher in the Carex habitat than in both the succulent halophyte habitat and the gramineous grass habitat; this may be attributed to dominance of competitive species in the Carex habitat with the lowest salinity (Dwire et al. 2004; Kluse and Diaz 2005). C. duriuscula formed obvious clusters with increased density, constituting their own small communities within the community—known as population patches (Wu et al. 2012). C. duriuscula was the species with the highest frequency on a mild salinization gradient within the Carex habitat. H. ruthenica, T. sinicum, and P. anserine appeared in the environment with less salinity, which was less harsh for the survival of these species. The succulent halophyte habitat represented species with a high salt tolerance; the soil was characterized by high levels of EC, Na+, Cl−, and SO42−. Succulent halophyte leaves and stems play an important role in adapting to high-salinity environments, as they dilute the toxic salts (Khan et al. 2000). K. cuspidatum, N. tangutorum, A. desertorum, and S. prostrata are concentrated in habitats with high salinity, providing them a higher chance of survival than other species. In our study, the abundance of constructive species was significantly higher in the Carex habitat and the succulent halophyte habitat than in the gramineous grass habitat (Fig. 4). This could be explained by the fact that the majority of the constructive species inhabited areas where the soil salinity was the highest or the lowest. Accordingly, the findings showed that the cluster distribution of species was more obvious in the high-salinity and low-salinity habitats than in the moderate-salinity habitat, analogous to the succulent halophyte habitat and the Carex habitat versus the gramineous grass habitat in present study (Wu et al. 2012).
The gramineous grass habitat included species that are typically presented in soils with high pH, and high concentration of Ca2+, CO32−, and HCO3−. The plants distributed in the gramineous grass habitat have a wide ecological adaptation range and moderate level of tolerance to salinity; generally, they can form communities under different salt conditions (Feng et al. 2020). In the gramineous grass habitat, the species tend to be distributed in moderate-salinity conditions. P. australis is a species with a wide distribution range and high intraspecific variation, typically dominating saline soil. The A. splendens community is a typical saline plant community inhabiting arid or semi-arid region; A. splendens, A. cristatum, and I. lacteal are usually distributed in soils with high salinity and alkalinity; their salt tolerance is higher than that of zonal vegetation. Salt stress in high-salinity environments could also inhibit plant growth. According to the “humped-backed” model, the biodiversity and species richness are the highest under moderate stress; therefore, the gramineous grass habitat could be considered favorable relative to the succulent halophyte habitat and the Carex habitat (Grime 2001; Pennings and Callaway 1992). Under moderate-salinity conditions, the abundance of the constructive species in the community was reduced. The abundance of dominant species and companion species was consistently higher in either the Carex habitat or the gramineous grass habitat than in the succulent halophyte habitat, indicating that the low- and moderate-salinity conditions were more conducive to the survival of dominant species and companion species than the high-salinity condition. The high-salinity habitat, which is suitable for the survival of succulent halophytes, prevented other species that cannot tolerate salt stress.
The structural composition of a community is a key indicator of ecosystem health (Werner et al. 2019). Our results have demonstrated that the plant community composition did qualitatively change in different saline habitats (Table S1), suggesting that different habitats, in having respective edaphic characteristics, varied in how they influenced the distribution of plant communities, leading to the emergence of species-specific habitat preferences (Muchuku et al. 2020). The change in plant community composition indicates that the difference in soil salinity of the three habitats affects the abundance of different species (Castaneda et al. 2013). In heterogeneous habitats, the spatial distribution of plant species is associated with their specific niche (Valladares et al. 2015); niche reflects the status of species within plant communities (Brooker et al. 2008). Constructive species have a wider niche for specific saline habitats and occupy a larger ecological space than dominant and companion species do, thus showing that constructive species exhibit strong adaptability to changes in soil salinity and that their distribution range is large and uniform. Further, constructive species can not only efficiently utilize environmental resources but also possess important ecological status and functions (Dong et al. 2020). Conversely, companion species have a narrow niche width, poor adaptability, and weak inter-species competition (Brooker et al. 2008).
The results of the Mantel test and CCA indicate that soil salinity and moisture both influence species distribution (Figs. 5, 6), which is consistent with the finding of other researches showing that these two factors greatly influence species distribution in saline habitats (Alvarez et al. 2000; Bui 2013; Neffar et al. 2013). In our study, the SM, soil EC, Na+, Mg2+, Ca2+, Cl−, SO42−, and HCO3− of habitats were found to influence the species distribution significantly, explaining 88.78% of the total variance in species distribution. Other studies have also found that the concentration of these ions are the main factors determining the distribution pattern and structure of plant communities in saline habitats of arid and semi-arid regions (Álvarez et al. 2001; Cebas‐Csic et al. 1997; Chenchouni 2016; Jafari et al. 2003). Consequently, the distribution pattern essentially reflects the response of plant growth to soil salinity (Castaneda et al. 2013). Notably, the distribution of species was more significantly affected by soil salinity than by SM. This is because plants growing in salt marsh wetlands may have employed an ecological adaptation strategy to survive in the saline habitat, in order to reduce the degree of dependence on SM. Further, the distribution of plant species in saline areas depends on the type of salt rather than the soil EC, which represents the total salt content (Tug et al. 2012). The rough pattern of plant community composition depends on EC, whereas the fine scale pattern considers ionic composition to play an additional vital role in plant community composition (José et al. 1998), thus improving our understanding of the distribution of common plant species in the three plant communities. The majority of species distributed around salt lakes contain substances aiding tolerance to soil salinity, but the tolerance ranges of these species vary. The stress tolerance limit of species plays a paramount role in determining their distribution pattern in stressful habitats (Maestre et al. 2009).
Conclusion
In conclusion, soil salinity showed an inhibitory effect on the plant diversity of salt marshes, thus confirming the results of other studies in arid and semi-arid regions. Moreover, there was a significant inhibitory effect of soil salinity on the abundance, richness, and distribution of species, as well as the predominance of constructive species and dominant species in each habitat. Hence, soil salinity may influence the composition and distribution of plant communities via direct and indirect regulation of salt concentrations and ion compositions in a complex manner. We conclude that the inhibitory effect of soil salinity on salt marsh plant diversity is affected by different habitats, thus emphasizing the general importance of soil salinity in the maintenance of the stability and complexity of inland salt marsh ecosystems.
Data availability
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
References
AFNOR (1999) Soil quality. AFNOR, Paris
Alvarez RJ, Alcaraz AF, Ortiz SR (2000) Soil salinity and moisture gradients and plant zonation in Mediterranean salt marshes of Southeast Spain. Wetlands 20:357–372
Álvarez RJ, Ortiz SR, Alcaraz AF (2001) Edaphic characterization and soil ionic composition influencing plant zonation in a semiarid Mediterranean salt marsh. Geoderma 99:81–98
Apaydin Z, Kutbay G, Yalçın E (2009) Relationships between vegetation zonation and edaphic factors in a salt-marsh community (Black Sea coast). Polish J Ecol 57:99–112
Aubert G (1978) Methods of soil analysis. CRDP, Marseille
Biggs AJW, Bryant K, Watling KM (2010) Soil chemistry and morphology transects to assist wetland delineation in four semi-arid saline lakes, south-western Queensland. Aust J Soil Res 48:208–220
Brevik EC, Cerdà A, Mataix-Solera J et al (2015) The interdisciplinary nature of SOIL. SOIL 1:117–129
Brooker RW, Maestre FT, Callaway RM et al (2008) Facilitation in plant communities: the past, the present, and the future. J Ecol 96:18–34
Bueno M, Lendínez ML, Calero J et al (2020) Salinity responses of three halophytes from inland saltmarshes of Jaén (southern Spain). Flora 266:151589
Bui EN (2013) Soil salinity: a neglected factor in plant ecology and biogeography. J Arid Environ 92:14–25
Burchill CA, Kenkel NC (1991) Vegetation–environment relationships of an inland boreal salt pan. Can J Bot 69:722–732
Castaneda C, Herrero J, Conesa JA (2013) Distribution, morphology and habitats of saline wetlands: a case study from Monegros, Spain. Geol Acta 11:371–388
Cebas-Csic JÁ, Hernández J, Silla RO et al (1997) Patterns of spatial and temporal variations in soil salinity: example of a salt marsh in a semiarid climate. Arid Soil Res Rehabilitat 11:315–329
Chenchouni H (2016) Edaphic factors controlling the distribution of inland halophytes in an ephemeral salt lake “Sabkha ecosystem” at North African semi-arid lands. Sci Total Environ 575:660–671
Coleman DC (2008) From peds to paradoxes: linkages between soil biota and their influences on ecological processes. Soil Biol Biochem 4:271–289
Contreras-Cruzado I, Infante-Izquierdo MD, Marquez-Garcia B et al (2017) Relationships between spatio-temporal changes in the sedimentary environment and halophytes zonation in salt marshes. Geoderma 305:173–187
Craft C (2016) Creating and restoring wetlands: from theory to practice. Elsevier, Amsterdam
Dong X, Li YH, Xin ZM et al (2020) Niche of the dominant species in wetland ecosystem enclosed by extremely dry desert region in Dunhuang Xihu. Acta Ecol Sin 40:6841–6849
Dwire KA, Kauffman JB, Brookshire ENJ et al (2004) Plant biomass and species composition along an environmental gradient in montane riparian meadows. Oecologia 139:309–317
Eallonardo AS Jr, Leopold DJ (2014) Inland salt marshes of the Northeastern United States: stress, disturbance and compositional stability. Wetlands 34:155–166
El-Ghani MA, Hamdy R, Hamed A (2014) Aspects of vegetation and soil relationships around athalassohaline lakes of Wadi El-Natrun, Western Desert. Egypt J Biol Earth Sci 4:B21–B35
Fan XM, Pedroli B, Liu GH et al (2011) Potential plant species distribution in the Yellow River Delta under the influence of groundwater level and soil salinity. Ecohydrology 4:744–756
Feng YQ, He TH, Chen XQ et al (2020) Study on the relationship between plant diversity and soil texture and salinity of saline meadow community. Acta Agrestia Sin 28:1682–1689
Gonzalez-Alcaraz MN, Jimenez-Carceles FJ, Alvarez Y et al (2014) Gradients of soil salinity and moisture, and plant distribution, in a Mediterranean semiarid saline watershed: a model of soil–plant relationships for contributing to the management. CATENA 115:150–158
Griffiths ME (2006) Salt spray and edaphic factors maintain dwarf stature and community composition in coastal sandplain heathlands. Plant Ecol 186:69–86
Grime JP (2001) Plant strategies, vegetation processes, and ecosystem properties. Wiley, New York
He JY, Sheng ZG, Thomas N (2009) Abiotic factors influencing the distribution of vegetation in coastal estuary of the Liaohe Delta, Northeast China. Estuaries Coasts 32:937–942
Hou LF, He XL, Li X et al (2019) Species composition and colonization of dark septate endophytes are affected by host plant species and soil depth in the Mu Us sandland, northwest China. Fungal Ecol 39:276–284
Huang W, Zhao X, Li Y et al (2018) Relationship between the haplotype distribution of Artemisia halodendron (Asteraceae) and hydrothermal regions in Horqin Sandy Land, northern China. Sci Cold Arid Reg 10:151–158
Jafari M, Zare MA, Tavili A et al (2003) Soil–vegetation relationships in Hoz-e-Soltan Region of Qom Province. Iran Pak J Nutr 2:329–334
José CJ, Manuel CJ, Martin Z et al (1998) Environmental relationships of vegetation patterns in saltmarshes of central Argentina. Folia Geobot 33:133–145
Kargar CH (2012) Soil-vegetation relationships of three arid land plant species and their use in rehabilitating degraded sites. Land Degrad Dev 23:92–101
Keesstra SD, Geissen V, Mosse K et al (2012) Soil as a filter for groundwater quality. Curr Opin Environ Sustain 4:507–516
Khan MA, Ungar IA, Showalter AM (2000) The effect of salinity on the growth, water status, and ion content of a leaf succulent perennial halophyte, Suaeda fruticosa (L.) Forssk. J Arid Environ 45:73–84
Kluse JS, Diaz BHA (2005) Importance of soil moisture and its interaction with competition and clipping for two montane meadow grasses. Plant Ecol 176:87–99
Köchy M, Hiederer R, Freibauer A (2015) Global distribution of soil organic carbon—Part 1: Masses and frequency distributions of SOC stocks for the tropics, permafrost regions, wetlands, and the world. SOIL 1:351–365
Koull N, Chehma A (2015) Soil–vegetation relationships of saline wetlands in North East of Algerian Sahara. Arid Land Res Manag 29:72–84
Li M, Qu X, Miao H et al (2020) Spatial distribution of endemic fluorosis caused by drinking water in a high-fluorine area in Ningxia, China. Environ Sci Pollut Res 27:20281–20291
Lv ZZ, Liu GM, Yang JS et al (2013) Spatial variability of soil salinity in Bohai Sea coastal wetlands, China: partition into four management zones. Plant Biosyst 147:1201–1210
Maestre FT, Callaway RM, Valladares F et al (2009) Refining the stress-gradient hypothesis for competition and facilitation in plant communities. J Ecol 97:199–205
Mclaughlin DL, Cohen MJ (2013) Realizing ecosystem services: wetland hydrologic function along a gradient of ecosystem condition. Ecol Appl 23:1619–1631
Minggagud H, Yang J (2013) Wetland plant species diversity in sandy land of a semi-arid inland region of China. Plant Biosyst 147:25–32
Muchuku JK, Gichira AW, Zhao SY et al (2020) Distribution pattern and habitat preference for Lobelia species (Campanulaceae) in five countries of East Africa. Phytokeys 159:45–60
Myers N, Mittermeier RA, Mittermeier CG et al (2000) Biodiversity hotspots for conservation priorities. Nature 403:853–858
Nargis N et al (2010) Is soil salinity one of the major determinants of community structure under arid environments? Community Ecol 11:84–90
Neffar S, Chenchouni H, Bachir AS (2013) Floristic composition and analysis of spontaneous vegetation of Sabkha Djendli in north-east Algeria. Plant Biosyst 150:396–403
Pennings SC, Callaway RM (1992) Salt marsh plant zonation: the relative importance of competition and physical factors. Ecology 73:681–690
Shannon CE, Weaver W (1950) The mathematical theory of communication. Bell Labs Tech J 3:31–32
Tug GN, Ketenoglu O, Bilgin A (2012) The relationships between plant zonation and edaphic factors in halophytic vegetation around Lake Tuz, Central Anatolia, Turkey. Rendiconti Lincei-Scienze Fisiche E Naturali 23:355–363
Valladares F, Bastias CC, Godoy O et al (2015) Species coexistence in a changing world. Front Plant Sci 6:866–866
Veldkornet DA, Potts AJ, Adams JB (2016) The distribution of salt marsh macrophyte species in relation to physicochemical variables. S Afr J Bot 107:84–90
Viswanathan C, Purvaja R, Jeevamani JJJ et al (2020) Salt marsh vegetation in India: species composition, distribution, zonation pattern and conservation implications. Estuarine Coast Shelf Sci 242:106792
Werner U, Piotr H, Mantilla CJ et al (2019) Compensatory effects stabilize the functioning of Baltic brackish and salt marsh plant communities. Estuarine Coast Shelf Sci 231:106480
Wu YN, Huo WG, Luo WT et al (2012) Quantitative analysis on the spatial heterogeneity of grass vegetation at different salinitly intensities. J Arid Land Resour Environ 26:84–90
Yang X, Wang XP, Qu YB et al (2019) Comparing the effects of companion species diversity and the dominant species (Stipa grandis) genotypic diversity on the biomass explained by plant functional trait. Ecol Eng 136:17–22
Zhang HB, Liu HY, Li YF et al (2013) Spatial variation of soil moisture/salinity and the relationship with vegetation under natural conditions in Yancheng coastal wetland. Environ Sci 34:540–546
Zhao P, Qu JJ, Xu XY et al (2019) Desert vegetation distribution and species–environment relationships in an oasis-desert ecotone of northwestern China. J Arid Land 11:461–476
Acknowledgements
We acknowledge members of the research team for their assistance with the field and laboratory work.
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This work was supported by the National Natural Science Foundation of China (Grant number 41761102).
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All authors contributed to the study conception and design. Material preparation, data collection, and data analysis were performed by TH, AZ, XQ, YF, XC and YH. The first draft of the manuscript was written by QC, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Cui, Q., He, T., Zhang, A. et al. Effects of soil salinity characteristics on three habitats in inland salt marshes. J Plant Res 134, 1037–1046 (2021). https://doi.org/10.1007/s10265-021-01328-x
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DOI: https://doi.org/10.1007/s10265-021-01328-x