caa a22 4500 606217614 CHVBK 20210128101108.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s11104-014-2339-7 doi (NATIONALLICENCE)springer-10.1007/s11104-014-2339-7 Effects of Phragmites invasion on soil microbial activity and structure in a brackish marsh [Elektronische Daten] [Keunyea Song, Jiae Lee, Chang-Jun Cha, Hojeong Kang] Background and aims: The spread of invasive plants in wetlands associated with human activity has become a serious environmental problem because of the negative effects of these species on biodiversity and biogeochemistry in ecosystems. Unlike their impacts on aboveground biodiversity, the responses of soil microbial communities and related soil characteristics to invasive plants are largely unknown. In this study, we assessed the structural and functional responses of soil microorganisms and belowground biogeochemistry to the invasion of Phragemites australis, which has heavily invaded in wetland areas globally, in brackish marsh areas in Korea. Methods: We measured soil biogeochemical characteristics including extracellular enzyme activities and microbial community structure (t-RFLP) in the marsh, both undisturbed and invaded areas over a year period. Results: We found higher extracellular enzyme activity in invaded areas compared to the undisturbed region dominated by the native species Scirpus planiculmis, and this response was profound during the growing season. Fungal and bacterial community structure, analyzed by terminal-restriction fragment length polymorphism, indicated that invasion by Phragmites had little effect on these communities. However, significantly higher microbial diversity was found in intermediately invaded areas in which Scirpus and Phragmites were co-dominant. Conclusions: This result suggests that microbial diversity was affected by plant diversity, rather than invasion by or presence of a particular species. Our results suggest that physicochemical conditions related to dominant plant species alter microbial activity, while plant diversity is a more important regulator of microbial community structure and diversity. Springer International Publishing Switzerland, 2014 Invasive species nationallicence Phragmites australis nationallicence Extracellular enzyme activity nationallicence Microbial community structure nationallicence Brackish marsh nationallicence Song Keunyea Department of Natural Resources, University of Nebraska, Lincoln, NE, USA aut Lee Jiae National Institute of Environmental Research, Incheon, South Korea aut Cha Chang-Jun Department of Biosystem Engineering, Joong-Ang University, Seoul, South Korea aut Kang Hojeong School of Civil and Environmental Engineering, Yonsei University, Seongsanno, Seodeamun-Ku, Seoul, Republic of Korea aut Plant and Soil Springer International Publishing 392/1-2(2015-07-01), 45-56 0032-079X 392:1-2<45 2015 392 11104 https://doi.org/10.1007/s11104-014-2339-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-014-2339-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Song Keunyea Department of Natural Resources, University of Nebraska, Lincoln, NE, USA aut NATIONALLICENCE 700 1- Lee Jiae National Institute of Environmental Research, Incheon, South Korea aut NATIONALLICENCE 700 1- Cha Chang-Jun Department of Biosystem Engineering, Joong-Ang University, Seoul, South Korea aut NATIONALLICENCE 700 1- Kang Hojeong School of Civil and Environmental Engineering, Yonsei University, Seongsanno, Seodeamun-Ku, Seoul, Republic of Korea aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 392/1-2(2015-07-01), 45-56 0032-079X 392:1-2<45 2015 392 11104