Wall DH, Bardgett RD, Covich A, Snelgrove PVR. Understanding the functions of biodiversity in soils and sediments will enhance global ecosystem sustainability and societal well-being. In: Wall DH Sustaining Biodiversity and Ecosystem Services in Soils Sediments. Sustaining Biodiversity and Ecosystem Services in Soils Sediments. Island Press; 2004:249-254.