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Sveiki!Man ļoti vajadzīgs jūsu padoms,kas attiecas uz pasaules ģeogrāfiju.Cik procentuāli mūsu planētu klāj meži un cik - pilsētvide? Atbildi man vajadzētu cik vien iespējams precīzu.
Paldies!
11, 2006, 11:52Ieva
:-:

    Rakstā Steffen Fritz, Andrew Hartley, Etienne Bartholomé and Alan Belward, 2005, GLC- 2000:A New Global Data Base for Environmental Monitoring and Resource Management. (Proceedings of the Second International VEGETATION User Conference) tiek apgalvots, ka urbanizēta vide aizņem 0,19% no sauszeme, bet dažādi meži 27,1%. Skaitļus vari pārbaudīt pati, jo zemes izmantošanas karte pieejama ikvienam:

    http://www-gvm.jrc.it/glc2000/Products/fullproduct.asp

    Pieminētais raksts atrodams:

    http://www.vgt.vito.be/vgtapen/proceedings/p423%20Fritz.pdf

    Bet nevajag aizmirst, ka mežu platības dramatiskā ātrumā samazinās, bet pilsētvide pieaug. «Ilustrētās Zinātnes» jūnija numurā ir teikts, ka pēc jaunākiem pētījumiem pilsētas aizņem 3% no sauszemes. Tiesa tik dramatiskas izmaiņas gan liecina par dažādu izmantoto metožu pilsētvides atpazīšanai atšķirību, nevis par patieso pieaugumu.

    Tā nu ir ar to precizitāti pasaules mērogā. Īstenībā jau Tavs jautājums ietver neprecizitātes, jo dažādiem cilvēkiem ir dažādi pieņemumi par to, kas ir pilsētvide un kas ir mežs. Kad biju Uzbekijā, tur par mežu vietēji lepni devēja to, ko mēs šeit Latvijā saucam par krūmāju. Dažs labs no, piemēram, Vācijas mežiem mūsu izpratnē drīzāk ir parks.

    22, 2006, 22:10ZIrneklītis
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