Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Investigation on relation between physicochemical characteristics of marl soils and plant communities (case study: Birjand plain).

Abstract

This study examined the vegetation and soil characteristics of marl lands in Birjand Plain in Iran. Geomorphological units were identified using topographic, land usability, lithology maps and aerial photographs. Sampling was done in homogenic units by systematic-randomized method. Size and number of plots were determined by minimal area and statistical methods, respectively. Vegetation and soil samples were taken in each plot. Soil parameters such as texture, pH, EC, SAR, lime and gypsum were measured in the laboratory. Differences between plant communities and reaction to soil variations were determined by analysis of variance and CCA in SPSS and Canoco 4.0 softwares. Results showed that different plant communities had different reactions to soil characteristics. Suaeda fruticosa, Chenopodium album, Salsola rigida and Aellenia glauca had the highest correlation with SAR but Salsola rigida [Salsola orientalis] and Aellenia glauca had shown the high correlation with EC, silt and gypsum amount. The introduction of invasive species (Cousinia eryngium) caused to low reaction of plant communities to edaphic factors. The other species had negative reaction to soil salinity and none of them had response to pH.