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Glomalin in Ecosystems

^a Dep. of Ecology and Evolutionary Biology, Univ. of California, Irvine, CA 92697
^b Dep. of Biological Sciences, Stanford Univ., Stanford, CA 94305

View larger version (34K): [in this window] [in a new window]   Fig. 1. Conceptual diagram of processes and environmental characteristics that may influence the size of glomalin stocks in ecosystems. Arrows indicate fluxes of nutrients (e.g., carbon and nitrogen) among pools of inorganic resources, vegetation, arbuscular mycorrhizal fungi, and soil glomalin. Traits listed within each pool could influence fluxes from that pool, with potential consequences for glomalin concentrations in soil.

View larger version (13K): [in this window] [in a new window]   Fig. 2. Relationship between soil immunoreactive soil protein (IRSP) and net primary productivity (NPP) in ecosystems from various biomes in North America, South America, Europe, and the Pacific Islands. Immunoreactive soil protein and NPP were significantly correlated (P = 0.0014). Each symbol represents one ecosystem (Table 1): A = agricultural; B = boreal forest; D = desert; TF = temperate forest; TG = temperate grassland; TR = tropical forest (note log–log axes).