PMID- 21614616
OWN - NLM
STAT- MEDLINE
DCOM- 20120215
LR  - 20211020
IS  - 1432-1939 (Electronic)
IS  - 0029-8549 (Linking)
VI  - 167
IP  - 3
DP  - 2011 Nov
TI  - Soil disturbance alters plant community composition and decreases mycorrhizal 
      carbon allocation in a sandy grassland.
PG  - 809-19
LID - 10.1007/s00442-011-2020-2 [doi]
AB  - We have studied how disturbance by ploughing and rotavation affects the carbon 
      (C) flow to arbuscular mycorrhizal (AM) fungi in a dry, semi-natural grassland. 
      AM fungal biomass was estimated using the indicator neutral lipid fatty acid 
      (NLFA) 16:1omega5, and saprotrophic fungal biomass using NLFA 18:2omega6,9. We labeled 
      vegetation plots with (13)CO(2) and studied the C flow to the signature fatty 
      acids as well as uptake and allocation in plants. We found that AM fungal biomass 
      in roots and soil decreased with disturbance, while saprotrophic fungal biomass 
      in soil was not influenced by disturbance. Rotavation decreased the (13)C 
      enrichment in NLFA 16:1omega5 in soil, but (13)C enrichment in the AM fungal 
      indicator NLFA 16:1omega5 in roots or soil was not influenced by any other 
      disturbance. In roots, (13)C enrichment was consistently higher in NLFA 16:1omega5 
      than in crude root material. Grasses (mainly Festuca brevipila) decreased as a 
      result of disturbance, while non-mycorrhizal annual forbs increased. This 
      decreases the potential for mycorrhizal C sequestration and may have been the 
      main reason for the reduced mycorrhizal C allocation found in disturbed plots. 
      Disturbance decreased the soil ammonium content but did not change the pH, 
      nitrate or phosphate availability. The overall effect of disturbance on C 
      allocation was that more of the C in AM fungal mycelium was directed to the 
      external phase. Furthermore, the functional identity of the plants seemed to play 
      a minor role in the C cycle as no differences were seen between different groups, 
      although annuals contained less AM fungi than the other groups.
FAU - Schnoor, Tim Krone
AU  - Schnoor TK
AD  - Plant Ecology and Systematics, Department of Biology, Lund University, Lund, 
      Sweden. tim.krone_schnoor@ekol.lu.se
FAU - Martensson, Linda-Maria
AU  - Martensson LM
FAU - Olsson, Pal Axel
AU  - Olsson PA
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20110526
PL  - Germany
TA  - Oecologia
JT  - Oecologia
JID - 0150372
RN  - 0 (Carbon Isotopes)
RN  - 0 (Fatty Acids)
RN  - 0 (Soil)
RN  - 7440-44-0 (Carbon)
RN  - 7631-86-9 (Silicon Dioxide)
SB  - IM
MH  - Biomass
MH  - Carbon/*metabolism
MH  - Carbon Cycle
MH  - Carbon Isotopes/metabolism
MH  - Fatty Acids/metabolism
MH  - Mycorrhizae/growth & development/*metabolism
MH  - Plant Roots/growth & development/metabolism/microbiology
MH  - Poaceae/growth & development/*metabolism/microbiology
MH  - Silicon Dioxide/*chemistry
MH  - Soil/*chemistry
MH  - *Soil Microbiology
EDAT- 2011/05/27 06:00
MHDA- 2012/02/16 06:00
CRDT- 2011/05/27 06:00
PHST- 2010/11/25 00:00 [received]
PHST- 2011/05/09 00:00 [accepted]
PHST- 2011/05/27 06:00 [entrez]
PHST- 2011/05/27 06:00 [pubmed]
PHST- 2012/02/16 06:00 [medline]
AID - 10.1007/s00442-011-2020-2 [doi]
PST - ppublish
SO  - Oecologia. 2011 Nov;167(3):809-19. doi: 10.1007/s00442-011-2020-2. Epub 2011 May 
      26.