Temporal dynamic of parasite-mediated linkages between the forest canopy and soil processes and the microbial community

TitleTemporal dynamic of parasite-mediated linkages between the forest canopy and soil processes and the microbial community
Publication TypeJournal Article
Year of Publication2016
AuthorsMellado A., Morillas L., Gallardo A., Zamora R.
JournalNew PhytologistNew PhytologistNew Phytologist
Volume211
Pagination1382-1392
Date PublishedSep
Type of ArticleArticle
ISBN Number0028-646X
Accession NumberWOS:000380961200024
KeywordsBARTSIA-ALPINA, diversity, ecosystem, ecosystem engineer, EXCHANGE MEMBRANES, FUNCTION, functional evenness, host-parasite interaction, land-use, microbial community, MicroResp, MISTLETOE VISCUM-ALBUM, mutualistic interaction, parasitic, PINUS-SYLVESTRIS, plant, PLANT LITTER, plant-soil interactions, SEED DISPERSAL, SEMIARID SAVANNA
Abstract

Parasitic plants are important drivers of community and ecosystem properties. In this study, we identify different mechanisms by which mistletoe (Viscum album subsp. austriacum) can affect soil chemical and biological properties at different temporal stages of parasitism. We quantified the effect of parasitism on host growth and the number of frugivorous mutualists visiting the host canopy. Then we collected, identified, and weighed the organic matter input underneath tree canopies and analyzed its nutrient content. Simultaneously, we analyzed soil samples under tree canopies and examined the chemical properties, microbial abundance, and functional evenness of heterotrophic microbial communities. Mistletoe increased the amount, quality, and diversity of organic matter input beneath the host canopy, directly through its nutrient-rich litter and indirectly through a reduction in host litterfall and an increase in bird-derived debris. All these effects gave rise to enriched hotspots able to support larger and more functionally even soil microbial communities beneath parasitized hosts, the effects of which were accentuated after host death. We conclude that mistletoe, together with the biotic interactions it mediates, plays a key role in intensifying soil resource availability, regulating the functional evenness, abundance, and spatial distribution of soil microbial communities.

Short TitleNew Phytol.New Phytol.
Alternate JournalNew Phytol.