title: Decomposition of Phragmites australis litter retarded by invasive Solidago canadensis in mixtures: an antagonistic non-additive effect.
abstract: Solidago canadensis is an aggressive invader in China. Solidago invasion success is partially attributed to allelopathic compounds release and more benefits from AM fungi, which potentially makes the properties of Solidago litter different from co-occurring natives. These properties may comprehensively affect litter decomposition of co-occurring natives. We conducted a field experiment to examine litter mixing effects in a Phragmites australis dominated community invaded by Solidago in southeast China. Solidago had more rapid mass and N loss rate than Phragmites when they decomposed separately. Litter mixing decreased N loss rate in Phragmites litter and increased that of Solidago. Large decreases in Phragmites mass loss and smaller increases in Solidago mass loss caused negative non-additive effect. Solidago litter extracts reduced soil C decomposition and N processes, suggested an inhibitory effect of Solidago secondary compounds. These results are consistent with the idea that nutrient transfer and secondary compounds both affected litter mixtures decomposition.
authors: 1] College of Resources & Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China [2] Department of Ecology & Evolutionary Biology, Rice University, Houston, TX 77005, USA.
authors: Ling
authors: L
authors: Zhang
authors: College of Resources & Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
authors: Yaojun
authors: Y
authors: Zhang
authors: 1] College of Resources & Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China [2] Department of Horticulture, Cornell University, Ithaca, NY 14853, USA.
authors: Jianwen
authors: J
authors: Zou
authors: 1] College of Resources & Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China [2] Department of Ecology & Evolutionary Biology, Rice University, Houston, TX 77005, USA.
authors: Evan
authors: E
authors: Siemann
mesh_terms: D001673:Biodegradation, Environmental; D018533:Biomass; D002244:Carbon / Q000378:metabolism*; D002681:China; D005658:Fungi / Q000472:pathogenicity; D009584:Nitrogen / Q000378:metabolism*; D010936:Plant Extracts / Q000494:pharmacology*; D018515:Plant Leaves / Q000382:microbiology; D006109:Poaceae / Q000737:chemistry / Q000254:growth & development* / Q000382:microbiology; D012989:Soil Pollutants; D036624:Solidago / Q000737:chemistry / Q000254:growth & development* / Q000382:microbiology
chemical_list: D010936:Plant Extracts; D012989:Soil Pollutants; D002244:Carbon; D009584:Nitrogen