6
Simpson BB (1977) Mesquite: its biology in two desert ecosystems. Dowden Hutchinson & Ross
Inc, Stroudsburg, PA
Tame T (1992) Acacias of Southeast Australia. Kangaroo, Kenthurst, Australia
Tye DRC, Drake DC (2012) An exotic Australian Acacia fi xes more N than a coexisting indigenous Acacia in a south African riparian zone. Plant Ecol 213:251–257
Van Auken OW (2000) Shrub invasions of North American semiarid grasslands. Annu Rev Ecol
Syst 31:197–215
Van Auken OW (2009) Causes and consequences of woody plant encroachment into western
North American Grasslands. J Environ Manage 90:2931–2942
Van Auken OW, Bush JK (1985) Secondary succession on terraces of the San Antonio River. Bull
Torrey Bot Club 112:158–166
West NE, Klemmedson JO (1978) Structural distribution of nitrogen in desert ecosystems. In:
West NE, Skujins JJ (eds) Nitrogen in desert ecosystems. Dowden, Hutchinson and Ross, Inc,
Stroudsburg, PA, pp 1–17
Whittaker RH (1975) Communities and ecosystems. MacMillan Publishing Co, New York, 162
Wigley BJ, Bond WJ, Hoffman MT (2010) Thicket expansion in a South African savanna under
divergent land use: local vs. global drivers? Glob Chang Biol 16:964–976
1 Introduction
Simpson BB (1977) Mesquite: its biology in two desert ecosystems. Dowden Hutchinson & Ross
Inc, Stroudsburg, PA
Tame T (1992) Acacias of Southeast Australia. Kangaroo, Kenthurst, Australia
Tye DRC, Drake DC (2012) An exotic Australian Acacia fi xes more N than a coexisting indigenous Acacia in a south African riparian zone. Plant Ecol 213:251–257
Van Auken OW (2000) Shrub invasions of North American semiarid grasslands. Annu Rev Ecol
Syst 31:197–215
Van Auken OW (2009) Causes and consequences of woody plant encroachment into western
North American Grasslands. J Environ Manage 90:2931–2942
Van Auken OW, Bush JK (1985) Secondary succession on terraces of the San Antonio River. Bull
Torrey Bot Club 112:158–166
West NE, Klemmedson JO (1978) Structural distribution of nitrogen in desert ecosystems. In:
West NE, Skujins JJ (eds) Nitrogen in desert ecosystems. Dowden, Hutchinson and Ross, Inc,
Stroudsburg, PA, pp 1–17
Whittaker RH (1975) Communities and ecosystems. MacMillan Publishing Co, New York, 162
Wigley BJ, Bond WJ, Hoffman MT (2010) Thicket expansion in a South African savanna under
divergent land use: local vs. global drivers? Glob Chang Biol 16:964–976
1 Introduction