144Nature, food, and water
Ban*
Cut•Nai+Nan•Phil+Ula•Por•San*
Sto+Ott+Sap+Seo*
Eas•Max*
Mos*
Bra+Iqu•Bar+Teg• Ber+
Kua+Kag•Edm•Atl•Number of natural landscapes in urban regionMedian area of 20 largest, widley distributedwooded patches (km2 )
0
0
10
20
30
40
50
246 8 10 12
Sdt+Te h*
Lon* Bei*
Cai*Chi+Rom+Buc+Erz•Can•Abe•Rah•(56)Figure 6.3Size of large wooded patches relative to number of natural landscapes.
Natural landscapes are >100 km^2 and compact in shape. All landscapes are wooded
except for: grassland in Erzurum urban region; grassland and wooded in Nairobi,
Ulaanbaatar, and Abeche; desert in Cairo and Rahimyar Khan; desert and wooded in
Tehran. Patch size is the median estimated area of the 20 largest wooded patches
(<100 km^2 ) widely distributed across agricultural and built areas (i.e., where
clustered, only one patch from the cluster is included). 10 km^2 = 3.9 mi^2. See
Chapter5 fornatural vegetation types, and Figure6.2caption for city information.This suggests problems for aquifer protection, large-home-range species, and
forthe viability and movement of key forest/woodland species. Wooded land-
scapes also are especially important for diverse recreational uses. In these urban
regions ahigh priorityis to reestablish natural landscapes, especially wooded
ones, by reconnecting pairs or clusters of large natural patches.
[N3]Eighty-two percent of the regions have natural landscapes, and 71% has wooded
landscapes, near the city (<50 km from city center); 11% and 13%, respectively, only have
more distant ones(Color Figures 2--39).