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EA:  ECOSYSTEM_TYPE_OLSON

Status: STD 2005/06/07
Code: 321
Concept definition: The type of an ecosystem in the Global Ecosystem Framework based on a combination of land cover, floristic properties, climate, and physiognomy; ecosystem type Olson.
 
Attribute value type: ENUMERATION
Reference type: IR
Reference: [GEF1]
Supplemental references:  
Enumerants (presented in a natural order)
Status Attribute label Enumerant label ▾ Concept definition Code Ref type Reference Supplemental references
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON BAMBOO_TREED_TRACT Comprised of woody tall <GRASS> <SHRUB>/woods, having evergreen <VEGETATION> and a moist-wet, hot-mild climate; bamboo treed tract. Dominant taxa include Bambusa (Asia) and Oxylenanthera (Africa). 1 IR [GEF1, Olson Ecosystem Type BAMBOO: 88 (bamboo wood/scrub)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON BARE_COAST_DUNE Comprised of moving/reversible <SAND_DUNE>s, having sparse <VEGETATION> and a hot-cold, dry climate; bare coast dune. Dominant taxa include Cakile, Corispermum, Lathyrus, and Croton. This Olson ecosystem type occurs where the <WIND> limits <VEGETATION> to a small fraction of the land <<AREA>> (for example: less than ten percent over an <<AREA>> of more than one square kilometre). 2 IR [GEF1, Olson Ecosystem Type BARECOASTDUN: 83 (bare coast dune)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON BARE_DESERT Comprised of ephemeral/sparse xerophytes, having low cover <VEGETATION> and an extreme drought hot-cold climate; bare desert. Dominant taxa include Salsola, Ambrosia, Cordylanthus, Lactuca, and Capparis. 3 IR [GEF1, Olson Ecosystem Type BAREDESERT: 8 (bare desert)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON BARREN_TUNDRA Comprised of dwarf herb, <SHRUB>, moss, lichen, having variable <VEGETATION> and a cold permafrost climate; barren tundra. Dominant taxa include Oxyria, Alopecuris, Carex, and Eriophorum. 4 IR [GEF1, Olson Ecosystem Type TUNDRABARREN: 53 (tundra barren arctic)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON BEACH_FOREDUNE_SHORELINE Comprised of low linear <SAND_DUNE>s, having pioneer <VEGETATION> and a wind-swept, storm-swept climate; beach foredune shoreline. Dominant taxa include Uniola, Elymus (Leymus), Ammophila, Andropogon, and Prunus. This Olson ecosystem type is a subtype of <<<COAST_HINTERLAND>>> that averages 0 to 3 metres above sea level in a <REGION> with an <<AREA>> of one square kilometre. Beach foredune shoreline can be more specifically separated into <<<SPARSE_DUNE_BUILDER>>>, <<<BARE_COAST_DUNE>>>, <<<RESIDUAL_DUNES_BEACH>>>, <<<COMPOUND_COAST>>>, and/or <<<ROCK_CLIFF_SLOPE>>>. 5 IR [GEF1, Olson Ecosystem Type BEACHFORDUNE: 81 (beach fore-dune)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON BROADLEAF_CROP_LAND Comprised of leafy rowcrops with/without <GRASS> and comprised of woody <VEGETATION>, having annual tops <VEGETATION> and a hot-cold climate; broadleaf crop land. Dominant taxa include Arachis (peanut), Solanum, Vitis (grape), and Humulus (hop). 6 IR [GEF1, Olson Ecosystem Type BROADLEAFCROP: 92 (broadleaf crops)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COAST_HINTERLAND Comprised of <BEACH>/<SAND_DUNE>/<ROCK>/slope, having variable <VEGETATION> and a marine climate; coast hinterland. Dominant taxa include Cakile and Lathyrus. This Olson ecosystem type has subtype <<<BEACH_FOREDUNE_SHORELINE>>>. 11 IR [GEF1, Olson Ecosystem Type COASTHINTLND: 80 (coast hinterland)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COAST_WETLAND_NE Comprised of mixed wet/dry <COAST> such that the principal land part, whether mainland or <ISLAND>, is in the north-east quadrant of the <REGION> being characterized, having variable <VEGETATION> and a hot-cold, windy climate; coast wetland-north-east. Dominant taxa include Spartina, Elymus, Ammophila, and Uniola. 7 IR [GEF1, Olson Ecosystem Type CSTWETLND-NE: 66 (coast wetland-NE)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COAST_WETLAND_NW Comprised of mixed wet/dry <COAST> such that the principal land part, whether mainland or <ISLAND>, is in the north-west quadrant of the <REGION> being characterized, having variable <VEGETATION> and a hot-cold, windy climate; coast wetland-north-west. Dominant taxa include Spartina, Elymus, Ammophila, and Uniola. 8 IR [GEF1, Olson Ecosystem Type CSTWETLND-NW: 65 (coast wetland-NW)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COAST_WETLAND_SE Comprised of mixed wet/dry <COAST> such that the principal land part, whether mainland or <ISLAND>, is in the south-east quadrant of the <REGION> being characterized, having variable <VEGETATION> and a hot-cold, windy climate; coast wetland-south-east. Dominant taxa include Spartina, Elymus, Ammophila, and Uniola. 9 IR [GEF1, Olson Ecosystem Type CSTWETLND-SE: 67 (coast wetland-SE)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COAST_WETLAND_SW Comprised of mixed wet/dry <COAST> such that the principal land part, whether mainland or <ISLAND>, is in the south-west quadrant of the <REGION> being characterized, having variable <VEGETATION> and a hot-cold, windy climate; coast wetland-south-west. Dominant taxa include Spartina, Elymus, Ammophila, and Uniola. 10 IR [GEF1, Olson Ecosystem Type CSTWETLND-SW: 68 (coast wetland-SW)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COLD_GRASSLAND Comprised of browsed meadow/steppe, having annual top <VEGETATION> and a cold, windy, dry-wet climate; cold grassland. Dominant taxa include Calamogrostis, Elymus, Eriophorum, other herbs, and Azorella. 12 IR [GEF1, Olson Ecosystem Type COLDGRASSLND: 42 (cold grassland)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COLD_IRRIGATED_CROP-
_LAND		 Comprised of tilled/hay pastured fields, having some irrigated crop <VEGETATION> and a snowy, long winter climate; cold irrigated crop land. Dominant taxa include Solanum tuberosa (potato), and Brassica (cabbage). 13 IR [GEF1, Olson Ecosystem Type COLDIRRIGATD: 39 (cold irrigated crops)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COMPOUND_COAST Comprised of a mixture of <<<HEATH_SCRUB>>>, <<<MANGROVE_FOREST_SCRUB>>>, <<<WATER_ISLAND_FRINGE>>>, <<<LAND_WATER_SHORE>>>, <<<LAND_WATER_RIVER>>> <<<CROP_LAND_WATER_MIXED>>>, <<<S_HMISPH_CONIFER>>>, <<<COAST_HINTERLAND>>>, and/or the other subtypes of <<<COAST_HINTERLAND>>>, having varied cover <VEGETATION> and a varied climate; compound coast. 14 IR [GEF1, Olson Ecosystem Type COMPOUNDCST: 85 (compound coast)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON CONIFEROUS_FOREST Comprised of very tall-to-low <FOREST>/woodland, having evergreen <TREE>/<SHRUB> <VEGETATION> and a hot-mild climate; coniferous forest. Dominant taxa include Pinus (taeda, palustris, elliotii, and caribaea) and Sequoia with <<<MIXED_FOREST>>>. 17 IR [GEF1, Olson Ecosystem Type CONIFOREST: 27 (conifer forest)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON CONIFER_BOREAL_FOREST Comprised of medium-low dense-open taiga, having narrow conifer <VEGETATION> and a cold climate; conifer boreal forest. Dominant taxa include Abies balsamea, Picea, and Pinus banksiana. 15 IR [GEF1, Olson Ecosystem Type CONIFRBOREAL: 21 (conifer boreal forest/wood)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON CONIFER_COOL_RAINFOREST Comprised of medium/tall <FOREST>, having evergreen conifer <VEGETATION> and a rainy/snowy climate; conifer cool rainforest. Dominant taxa include Picea sitkensis/rubra, Tsuga, Alnus/Betula, and Gaultheria. 26 IR [GEF1, Olson Ecosystem Type COOLRAINFRST: 20 (conifer cool rainforest)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON CONIFER_EVERGREEN_FOREST Comprised of needle-leaf <FOREST>, having evergreen conifer <VEGETATION> and a warm-cold climate. Dominant taxa include Tsuga, Pinus, Picea, Abies, and Chamaecyparis. 16 IR [GEF1, Olson Ecosystem Type CONIFEVRGFST: 3 (conifer evergreen forest)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COOL_CONIFER_FOREST Comprised of low-to-tall <FOREST> and comprised of woodland, having evergreen conifer <VEGETATION> and a snowy climate; cool conifer forest. Dominant taxa include Pinus, Pseudotsuga, Picea, Abies, and Libocedrus. 19 IR [GEF1, Olson Ecosystem Type COOLCONIFRST: 22 (cool conifer forest/wood)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COOL_CROP_LAND_TOWN Comprised of <FARM>s with/without pasture and comprised of settlements, having summer crop <VEGETATION> and a snowy winter climate; cool crop land/town. Dominant taxa include spring grain, forage with or without <<<CORN_BEAN_CROP_LAND>>>, Poa, Agrostis, and Agropyron with <<<URBAN_SUBURBAN>>>. 20 IR [GEF1, Olson Ecosystem Type COOLCROPTOWN: 30 (cool crop/town)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COOL_DECID_FOREST Comprised of medium-tall <FOREST>, having cold-deciduous <VEGETATION> and a persistent snowy climate; cool deciduous forest. Dominant taxa include Acer, Quercus rubra, Quercus alba, and Fraxinus with or without Fagus. 18 IR [GEF1, Olson Ecosystem Type COOLDECDFRST: 25 (cool deciduous forest)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COOL_FIELD_TREED_TRACT Comprised of <CROP_LAND>/herb with <TREED_TRACT>/<SHRUB> covering 20-40 percent of the <<AREA>> of the <REGION> being characterized, having cold-deciduous/evergreen <VEGETATION> and a snowy climate; cool field/treed tract. Crops cover no more than 60 percent of the <<AREA>> of the <REGION>. Dominant taxa include Poa, Bromus, Quercus, Prunus, and Crataegus. 21 IR [GEF1, Olson Ecosystem Type COOLFIELDWDS: 55 (cool field wood/shrub)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COOL_FOREST_FIELD Comprised of <FOREST> with <CROP_LAND>/<SHRUB>/<GRASSLAND>, having mixed/cold-deciduous <VEGETATION> and a snowy climate; cool forest field. Dominant taxa include Quercus, Betula, Acer, and Amelanchier. 22 IR [GEF1. Olson Ecosystem Type COOLFORSTFLD: 57 (cool forest field)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COOL_GRASS_HERB_SHRUB Comprised of mid-tall <GRASS>, herb, <SHRUB>, having annual foliage <VEGETATION> and a snowy, windy climate; cool grass herb/shrub. Dominant taxa include Bromus, Poa (C3 <GRASS>), Trifolium, Andropogon, and Panicum. 23 IR [GEF1, Olson Ecosystem Type COOLGRASSHRB: 40 (cool grass herb/shrub)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COOL_IRRIGATED_CROP-
_LAND		 Comprised of tilled/hay pastured fields, having mostly irrigated crop <VEGETATION> and a snowy most winters climate; cool irrigated crop land. Dominant taxa include Beta vulgaris (sugar beets), grains, and forage. 24 IR [GEF1, Olson Ecosystem Type COOLIRRIGATD: 38 (cool irrigated crops)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COOL_MIXED_FOREST Comprised of medium/tall <FOREST>, having evergreen/cold-deciduous <VEGETATION> and a snowy climate; cool mixed forest. Dominant taxa include Betula, Acer with/without Fagus, Pinus, Picea, Abies, and Tsuga. 25 IR [GEF1, Olson Ecosystem Type COOLMIXDFRST: 23 (cool mixed forest)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON COOL_S_HMISPH_MIXED-
_FOREST		 Comprised of tall-to-low <FOREST>, having evergreen broadleaf <VEGETATION> and a cool-cold climate; cool southern hemisphere mixed forest. Dominant taxa include Nothofagus, Drimes winteri, Pilgerodendron, and Podocarpus. 27 IR [GEF1, Olson Ecosystem Type COOLSOHEMIXF: 54 (cool southern hemisphere mixed forest)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON CORN_BEAN_CROP_LAND Comprised of rowcrops: maize, soy, cover, having alternation <VEGETATION> with/without irrigation; corn/bean crop land. Dominant taxa include Zea maize, Gycine max (soy), Festuca, and Bromus. 28 IR [GEF1, Olson Ecosystem Type CROPCORNBEAN: 35 (crops: corn/bean)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON CROP_LAND_GRASSLAND-
_SCRUB_LAND		 Comprised of <FARM>, <GRASSLAND>, and/or <SCRUB_LAND>, having herbage <VEGETATION> and a cold-hot, wet-dry climate; crop land/grassland/scrub land. Dominant taxa are mosaics of other Olson ecosystem types. 31 IR [GEF1, Olson Ecosystem Type CROPGRASSHRB: 94 (crop grass/shrub)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON CROP_LAND_TOWN Comprised of <FARM>s with/without pasture and <TOWN>s, having crop mix <VEGETATION> and a mild-hot, wet-dry climate; crop land/town. Dominant taxa include winter grain, Gossypium, Sorghum, and Panicum with/without <<<CORN_BEAN_CROP_LAND>>>. 30 IR [GEF1, Olson Ecosystem Type CROPTOWN: 31 (crop/town)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON CROP_LAND_WATER_MIXED Comprised of <CROP_LAND> with coast/<RIVER>/pond/<WETLAND>, having variable cover <VEGETATION> and a variable climate; crop land/water mixed. Dominant taxa include Calamogrostis, Phragmites with crop, and pasture. 29 IR [GEF1, Olson Ecosystem Type CROPWATERMIX: 76 (crop/water mix)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON DECIDUOUS_TREE_CROP Comprised of <FARM>s on which deciduous <TREE>s are cultivated; deciduous tree crop. 36 IR [GEF1]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON DECID_BROADLEAF_FOREST Comprised of medium/tall <FOREST>, having cold-deciduous <VEGETATION> and a mild-hot climate; deciduous broadleaf forest. Dominant taxa include Quercus, Carya, Liriodendron, Magnolia, Acer, and Juglans with <<<DECID_BROADLEAF_TREED_TRACT>>>. 32 IR [GEF1, Olson Ecosystem Type BROADLFOREST: 26 (broadleaf forest)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON DECID_BROADLEAF_TREED-
_TRACT		 Comprised of broadleaf <FOREST>/woodland with <SHRUB>, having deciduous <VEGETATION> and a hot-cold climate; deciduous broadleaf treed tract. Dominant taxa include Quercus, Carya, Fraxinus, Ulmus, Celtis, and Populus. 33 IR [GEF1, Olson Ecosystem Type DECIDUBDLFWD: 5 (deciduous broadleaf wood)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON DECID_CONIFER_FOREST Comprised of needle-leaf <FOREST> with woodland, having deciduous <VEGETATION> and a generally cold climate; deciduous conifer forest. Dominant taxa include Larix (Taxodium is in <<<TREED_WETLAND>>>). 34 IR [GEF1, Olson Ecosystem Type CONIFDECIDWD: 4 (conifer deciduous wood)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON DRY_EVERGREEN_BROADLEAF-
_TREED_TRACT		 Comprised of woodland and low/dry <FOREST>, having broadleaf evergreen <VEGETATION> and a dry climate; dry evergreen broadleaf treed tract. Dominant taxa include Tecoma, Schinopsis, Aspidosperma, and Acacia (quebracho). 37 IR [GEF1, Olson Ecosystem Type WOODRYEVRGRN: 48 (wood dry evergreen broadleaf)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON DRY_TREED_SCRUB_LAND Comprised of <SHRUB> with/without low/open woodland, having evergreen <VEGETATION> and a dry/cool-warm climate; dry treed scrub land. Dominant taxa include Juniperus and Pinus (cedulus, monosperma, and flexilis). 39 IR [GEF1, Olson Ecosystem Type SHRUBWOODRY: 47 (scrub wood dry)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON DRY_TROPICAL_TREED_TRACT Comprised of woodland/low <FOREST> and C4 <GRASS>, having drought-deciduous <VEGETATION> and a hot, dry climate; dry tropical treed tract. Dominant taxa include Prosopis, Cercidium, Aspidospermum, and Cedrela. 38 IR [GEF1, Olson Ecosystem Type DRYTROPICWDS: 32 (dry tropical wood/shrub)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON EVERGREEN_BROADLEAF-
_TREED_TRACT		 Comprised of broadleaf <FOREST>/woodland, having evergreen <VEGETATION> and a mild-warm climate; evergreen broadleaf treed tract. Dominant taxa include Quercus virginiana, Persea, Magnolia, and Ilex. 40 IR [GEF1, Olson Ecosystem Type EVERGRBDLFWD: 6 (evergreen broadleaf wood)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON EVERGREEN_FOREST_FIELD Comprised of crop/herb, <SHRUB>, and/or <FOREST>, having evergreen conifer/broadleaf <VEGETATION>; evergreen forest/field. Dominant taxa include Pinus, Pseudotsuga, and Sabal palmetto. 41 IR [GEF1, Olson Ecosystem Type EVRGNFRSTFLD: 19 (evergreen forest/field)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON EVERGREEN_TREE_CROP Comprised of <FARM>s on which evergreen <TREE>s are cultivated; evergreen tree crop. 42 IR [GEF1]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON FIELD_TREED_SAVANNA Comprised of <CROP_LAND>/herb with <FOREST>/<SHRUB> covering 20-40 percent of the <<AREA>> of the <REGION> being characterized, having deciduous/evergreen <VEGETATION> and a hot-cool climate; field/treed savanna. Dominant taxa include Festuca, Diospyros, Sassafras, and Cornus. 43 IR [GEF1, Olson Ecosystem Type FIELDWDSAVNA: 58 (field/wood savanna)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON FOREST_FIELD Comprised of <FOREST> with <CROP_LAND>/<SHRUB>/<GRASSLAND>, having mixed/deciduous <VEGETATION> and a mild-hot climate; forest field. Dominant taxa include Quercus, Platanus, and Liquidambar. 44 IR [GEF1, Olson Ecosystem Type FORESTFIELD: 56 (forest field)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON GLACIER_ICE Comprised of Antarctic/mountain/sea <ICE>, having algae/lichen <VEGETATION> and a very cold climate; glacier ice. Dominant taxa include cryptogams (lichen and algae). 45 IR [GEF1, Olson Ecosystem Type GLACIERICE: 12 (glacier ice)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON GLACIER_ROCK Comprised of Arctic/mountain <GLACIER> and/or <SNOW_GROUND_COVER>, having microbe/herb <VEGETATION> and a very cold climate; glacier rock. 46 IR [GEF1, Olson Ecosystem Type GLACIEROCK: 70 (glacier rock)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON GRASS_CROP_LAND Comprised of cereal, hay greater than 60 percent cover with/without settlements, having annual tops <VEGETATION> and a cool-hot, wet-dry climate; grass crop land. Dominant taxa include Triticum (wheat), Avena (oats), Hordeum (barley), and Secale (rye). 47 IR [GEF1, Olson Ecosystem Type GRASSCROP: 93 (grass and crop)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON HEATH_SCRUB Comprised of dwarf-tall scrub, acid <SOIL>, having evergreen-mixed <VEGETATION> and a mild-cold climate; heath scrub. Dominant taxa include Empetrum, Vaccinum, Calluna, Kalmia, and Rhododendron. 48 IR [GEF1, Olson Ecosystem Type HEATHSCRUB: 64 (heath shrub)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON HOT_MILD_GRASS_HERB-
_SHRUB		 Comprised of prairie/pampas/rangeland, having mixed foliage (C4) <VEGETATION> and a mild-hot climate; hot-mild grass herb shrub. Dominant taxa include Bouteloua, Aristida, Setaria (C4 <GRASS>) with/without <SHRUB>, and <TREE>s. 50 IR [GEF1, Olson Ecosystem Type HOTMLDGRSHB: 41 (hot-mild grass herb shrub)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON HOT_MILD_IRRIGATED_CROP-
_LAND		 Comprised of tilled/pastured fields, having extensively irrigated crop <VEGETATION> and a climate with rare or no <SNOW_PRECIPITATION>; hot-mild irrigated crop land. Dominant taxa include Gossypium (cotton) and Saccharum officinarium (sugar cane). 49 IR [GEF1, Olson Ecosystem Type HOTIRRIGATED: 37 (hot-mild irrigated crop)]  
STD
2005/06/07		 ECOSYSTEM_TYPE_OLSON IRRIGATED_CROP_GRASSLAND Comprised of farm rangeland with irrigated <CROP_LAND>, having herbage <VEGETATION> and a dry, hot-cold climate; irrigated crop grassland. Dominant taxa include Medicago sativa (alfalfa), Sorghum, Triticum, and Bromus. 52 IR [GEF1, Olson Ecosystem Type IRRIGCRASSLD: 10 (irrigated crop grassland)]  
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