Variation in xylem structure from tropics to tundra: Evidence from vestured pits

Jansen et al. 10.1073/pnas.0402621101.

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Floristic checklists surveyed according to the macroclimatic categories recognized

Seasonal (deciduous), tropical woodlands (savannas)

N. Surinam, savanna (1); India, moist deciduous forests of Dangs (2); Ivory Coast (3); Belize, Pine Savanna (4); Mozambique, (http://w3.sasol.com/natural_gas/Environment/SEISMIC%20Document%20PDF/Appendix%20C/Appendix%20C.pdf); D.R. Congo, Katanga (5); Cerrado, Central Brazil (6, 7); Cerrado, Matto Grosso, Brazil (8); Brazil (9).

Warm and cold deserts

Sahara and Sahel (10); Saudi Arabia (11); East Sahara (12); Sahara (13); Chihuahuan Desert (14); Southern California (15); Peruvian and Atacama desert (www.sacha.org/envir/deserts/flora/taxa/dic.htm).

Everwet, tropical lowlands (rainforest)

Sulawesi (16); peat swamp forests, Sarawak and Brunei (17); Jengka forest reserve, Malaya (18); Amazonia (19); Amazonas rainforest (20); Brazil (9); India, Kudremukh National Park (www.kudremukh.org/kudremukh/woody.html); Atlantic rainforest in Rio de Janeiro State (21); North Surinam rainforest (22); Iquitos, Peru (23); Polynesia (24); Serranía de Pilón Lajas and the adjacent Piedmont, Ballivian Province, Beni, Bolivia (www.mobot.org/MOBOT/Research/bolivia/pilonchecklist/welcome.shtml).

Subtropical to warm temperate regions (everwet subtropical rainforests, subtropical savannas with a wet summer, and subtropical areas with a wet winter)

Japan (25); Europe (26); Swaziland (27); Israel (28); Brazil (9); West branch of Santa Cruz, Tucson, AZ (29).

Tropical, submontane (1,100- to 2,000-m altitude), and montane (>2,000-m altitude) regions

Submontane to montane forest, Crocker Range, Sabah (www.arbec.com.my/pdf/art3julysep02.pdf); Swaziland (1,400 m) (27); Philippines, Mt. Tabayoc, Mt. Pulog (above 2,200 m) (30); Malawi submontane (1,370-2,290 m) and montane (1,675-2,590 m) forest (31); Colombia, above 1,800 m (20); Kelabit highlands (» 1,100 m), Bario, Sarawak (www.arbec.com.my/pdf/art2mayjun99.pdf).

Cool temperate areas with a cold, wet, or mild winter

New Zealand (32); Hokkaido, Japan (33); Europe (26, 34); Kansas, U.S. (35); South Dakota, U.S. (www.nps.gov/wica/Plant_Communities.htm); Wicken Fen, U.K. (www.wicken.org.uk/Check%20list%20%20plants.pdf); Belgium, Luxembourg, N. France (36); Netherlands (37); Norway (38); Victorian volcanic plain, Australia (http://home.vicnet.net.au/~iffa/GPCconf/CarrApp.pdf).

Boreal-arctic areas with severe long winters

Newfoundland and Labrador (www.nfmuseum.com/meades.htm); Europe (26); Greenland (39-41); Alaska (42); Fireland (43); Falkland Islands (44); Iceland and Faeroes (45); Spitsbergen (46).

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This Article

  1. PNAS June 8, 2004 vol. 101 no. 23 8833-8837