Urban mycorrhizas: predicting arbuscular mycorrhizal abundance in green roofs

被引：24
作者：
Chaudhary, V. Bala [1 ]
Sandall, Emily L. [2 ]
Lazarski, Martha V. [1 ]
机构：
[1] De Paul Univ, Dept Environm Sci & Studies, 1110 West Belden Ave, Chicago, IL 60614 USA
[2] Penn State Univ, Dept Entomol, University Pk, PA 16802 USA
来源：
FUNGAL ECOLOGY | 2019年 / 40卷
关键词：
Soil; Fungi; Propagule; Dispersal; Nitrogen; Phosphorus; Sustainability; Ecosystem services; Megacity; Chronosequence; NITROGEN-FERTILIZATION; FUNGAL DIVERSITY; PLANTS; ROOTS; COLONIZATION; METAANALYSIS; DYNAMICS; PATTERNS; SPORES; FOREST;
D O I：
10.1016/j.funeco.2018.03.002
中图分类号：
Q14 [生态学（生物生态学）];
学科分类号：
071012 ; 0713 ;
摘要：
Mycorrhizas face unique anthropogenic stressors in urban environments, but the factors influencing their abundance in cities remains comparatively unstudied. Using green roofs as a model system, we built a conceptual model outlining the biotic and abiotic factors influencing arbuscular mycorrhizal (AM) fungal abundance in cities. We then tested this model and its multiple causal hypotheses with structural equation modeling using plant, soil, and AM fungal abundance measurements from 60 plots across 12 green roofs in Chicago, USA. The best direct predictor of AM fungal abundance was not plant cover, plant richness, or soil nutrients, but instead green roof age, suggesting temporal accumulation of AM fungal propagules in degraded urban environments. Soil P had the strongest total effect on AM fungal abundance both directly and via indirect promotion of plant cover. This study highlights knowledge gaps and challenges to studying the urban ecology of AM fungi. (C) 2018 Elsevier Ltd and British Mycological Society. All rights reserved.
引用
收藏
页码：12 / 19
页数：8
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