Correlated biogeographic variation of magnesium across trophic levels in a terrestrial food chain.
Using samples from eastern China (c. 25 - 41° N and 99 - 123° E) and from a common garden experiment, we investigate how Mg concentration varies with climate across multiple trophic levels. In soils, plant tissue (Oriental oak leaves and acorns), and a specialist acorn predator (the weevil Curculio davidi), Mg concentration increased significantly with different slopes from south to north, and generally decreased with both mean annual temperature (MAT) and precipitation (MAP). In addition, soil, leaf, acorn and weevil Mg showed different strengths of association and sensitivity with climatic factors, suggesting that distinct mechanisms may drive patterns of Mg variation at different trophic levels. Our findings provide a first step toward determining whether anticipated changes in temperature and precipitation due to climate change will have important consequences for the bioavailability and distribution of Mg in food chain.
School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China.
Xiao
X
Sun
Adam D
AD
Kay
Hongzhang
H
Kang
Gaston E
GE
Small
Guofang
G
Liu
Xuan
X
Zhou
Shan
S
Yin
Chunjiang
C
Liu
D000818:Animals; D002413:Cations, Divalent; D002681:China; D002980:Climate; D057231:Climate Change; D017753:Ecosystem; D020387:Food Chain; D008274:Magnesium / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry*; D029963:Quercus / Q000737:chemistry*; D011891:Rain; D012044:Regression Analysis; D012987:Soil / Q000737:chemistry*; D013696:Temperature; D048889:Weevils / Q000737:chemistry*
D002413:Cations, Divalent; D012987:Soil; D008274:Magnesium