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Leucaena leucocephala / Pennisetum spp. - Melinis spp. Polynesian Ruderal Lowland Shrubland, Grassland & Savanna Group | NatureServe Biotics 2019
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Name: Leucaena leucocephala / Pennisetum spp. - Melinis spp. Polynesian Ruderal Lowland Shrubland, Grassland & Savanna Group Reference: NatureServe Biotics 2019 Description: This Polynesian ruderal lowland dry grassland and shrubland group is characterized by grass or shrub layers dominated by non-native species that have become abundant with absence of fire, the introduction of aggressive invasive species and disturbance from changes in land use, such as cattle and feral pig grazing. These non-native grasslands and shrublands have replaced native grasslands and shrublands. Native grasslands were once fairly widespread and were maintained and expanded by regular burning by ancient Hawaiians. Many dry grasslands have been replaced by exotic grass species or converted to exotic shrublands. Stands are dominated by non-native greases such as <i>Andropogon virginicus, Cynodon dactylon, Melinis minutiflora, Melinis repens, Pennisetum setaceum, Pennisetum clandestinum, Pennisetum purpureum</i>, and <i>Paspalum vaginatum</i> with and without a non-native shrub overstory. Shrublands can be dominated by the introduced non-natives <i>Lantana camara, Leucaena leucocephala</i>, and/or <i>Schinus terebinthifolius</i>. Native lowland dry shrublands are relatively intolerant to grazing pressure and fire, and are replaced by alien-dominated communities when subjected to these disturbances. Sites range from flat to steep slopes with varying soil depths, as well as rocky cliffs and recent lava flows with sparse to dense coverage, depending on substrate and moisture availability. Elevations extend from sea level to montane zone. Sparsely vegetated rocky cliffs and recent lava flows dominated by non-native species are included in this group because the same species occur as those found in non-sparse stands. The density and height of shrubs may be reduced by recent fire or increased with increased moisture, for example when near riparian areas.  Accession Code: urn:lsid:vegbank.org:commConcept:40147-{5C577E4A-4F2B-44F4-9FEE-E01EF646A21D} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-May-2016 to: ongoing
	status: accepted Community's Parent: Polynesian Ruderal Lowland Shrubland, Grassland & Savanna Macrogroup This Community's Level: Group This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.860776 NatureServe Explorer   Code: G413   Scientific: Leucaena leucocephala / Pennisetum spp. - Melinis spp. Polynesian Ruderal Lowland Shrubland, Grassland & Savanna Group