Ungulate and topographic control of arbuscular mycorrhizal fungal spore community composition in a temperate grassland

被引:46
作者
Murray, Tanya R. [1 ]
Frank, Douglas A. [1 ]
Gehring, Catherine A. [2 ]
机构
[1] Syracuse Univ, Syracuse, NY 13244 USA
[2] No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011 USA
关键词
AMF; arbuscular mycorrhiza; grassland; grazing; mutualism; N:P; phosphorus; species composition; ungulate; Yellowstone National Park; USA; HOST-PLANT; DIVERSITY; NITROGEN; COLONIZATION; VEGETATION; PHOSPHORUS; ECOSYSTEM; MOISTURE; DYNAMICS; ECOLOGY;
D O I
10.1890/09-0209.1
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Large herbivores and topo-edaphic gradients are well-documented, major determinants of grassland plant production and species composition. In contrast, there is limited information about how these factors together may influence the composition of the arbuscular mycorrhizal fungus (AMF) communities associated with plants. AMF are a common component of grassland ecosystems where they can influence plant productivity, diversity, and soil stability. In this study, AMF community composition was analyzed in paired plots located inside and outside 40-44-year-old ungulate exclosures at six grassland sites in Yellowstone National Park (YNP), USA, that varied in soil moisture and the availability of soil nitrogen (N) and phosphorus (P). AMF spore abundance, species richness, and the relative abundance of AMF species were determined from soil samples collected (1) randomly (n = 5 samples) within each of the 12 plots and (2) from beneath the dominant grass (n = 5 samples per plot) at each site. Randomly collected soil samples explored the effects of ungulates and topographic position on AM F composition at the plant community level, subsuming potential effects of ungulates on plant species composition. Dominant plant samples examined how grazers, in particular, influenced AMF communities, while controlling or host-plant identity. Grazing decreased AMF spore abundance across the landscape (examined by random sampling) but increased the AM F species richness associated with dominant plants. Grazing influenced the AMF species composition at the plant community level and at the host-plant level by shifting the relative abundances of individual AMF species. Individual AMF species responded differently to grazing and N and P availability. Our results demonstrate how soil moisture and N and P availability across the landscape interact with grazing to influence AMF species composition.
引用
收藏
页码:815 / 827
页数:13
相关论文
共 79 条
[1]   PATTERNS AND REGULATION OF MYCORRHIZAL PLANT AND FUNGAL DIVERSITY [J].
ALLEN, EB ;
ALLEN, MF ;
HELM, DJ ;
TRAPPE, JM ;
MOLINA, R ;
RINCON, E .
PLANT AND SOIL, 1995, 170 (01) :47-62
[2]  
ALLEN MF, 1989, BIOL FERT SOILS, V8, P285, DOI 10.1007/BF00263155
[3]   INTERACTION OF VASCULAR PLANTS AND VESICULAR-ARBUSCULAR MYCORRHIZAL FUNGI ACROSS A SOIL MOISTURE-NUTRIENT GRADIENT [J].
ANDERSON, RC ;
LIBERTA, AE ;
DICKMAN, LA .
OECOLOGIA, 1984, 64 (01) :111-117
[4]   Ungulate effects on the functional species composition of plant communities: Herbivore selectivity and plant tolerance [J].
Augustine, DJ ;
McNaughton, SJ .
JOURNAL OF WILDLIFE MANAGEMENT, 1998, 62 (04) :1165-1183
[5]   Arbuscular mycorrhizal fungi associated with Populus-Salix stands in a semiarid riparian ecosystem [J].
Beauchamp, VB ;
Stromberg, JC ;
Stutz, JC .
NEW PHYTOLOGIST, 2006, 170 (02) :369-380
[6]  
Bethlenfalvay G. J., 1988, Arid lands: today and tomorrow., P1015
[7]  
BETHLENFALVAY GJ, 1984, J RANGE MANAGE, V37, P312, DOI 10.2307/3898701
[8]   Preferential allocation to beneficial symbiont with spatial structure maintains mycorrhizal mutualism [J].
Bever, James D. ;
Richardson, Sarah C. ;
Lawrence, Brandy M. ;
Holmes, Jonathan ;
Watson, Maxine .
ECOLOGY LETTERS, 2009, 12 (01) :13-21
[9]  
Bever JD, 2002, ECOL STU AN, V157, P267
[10]   Host-dependent sporulation and species diversity of arbuscular mycorrhizal fungi in a mown grassland [J].
Bever, JD ;
Morton, JB ;
Antonovics, J ;
Schultz, PA .
JOURNAL OF ECOLOGY, 1996, 84 (01) :71-82