Diversity and functional responses of nitrogen-fixing microbes to three wetland invasions
作者： Serena M. Moseman , Rui Zhang , Pei Yuan Qian , Lisa A. Levin
DOI: 10.1007/S10530-008-9227-0
关键词:
摘要: Impacts of invasive species on microbial components wetland ecosystems can reveal insights regarding functional consequences biological invasions. Nitrogen fixation (acetylene reduction) rates and diversity nitrogen fixers, determined by genetic fingerprinting (T-RFLP) the nifH gene, were compared between native invaded sediments in three systems. Variable responses fixing microbes to invasion a non-native mussel, Musculista senhousia, mangrove, Avicennia marina, Kendall Frost-Northern Wildlife Preserve (Mission Bay) salt cedar, Tamarisk (Tamarix spp.) Tijuana Estuary suggest respond both species- site-specific influences. Structurally similar invaders (the mangrove cedar) produced different effects activity reflecting distinct environmental contexts. Despite relative robustness community composition, subtle differences total or fixers that are not immune impacts invasions, redundancy is limited, with significant for dynamics wetlands.
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