Chris Cantell Discusses Science: Utok zravych chrobakov v Rocky Mountains by Natalia Holvova

Viac ako 1.5 miliona akrov vysadenych borovic bolo nedavno znicenych v Coloradskych Rocky Mountains zravymi chrobakmi a toto zamorenie bude pravdepodobne pokracovat dalej. Zdrave chrobaky su parazitny hmyz, obycajne zijuci vo vnutri prachnivych, suchych, umierajucich stromov, co moze pomoct znicit uz tak chore stromy v lese. Niekedy sa vsak rozmnozuju velmi rychle a nekontrolovane a utocia aj na zdrave stromy. Obrovske sirenie zravych chrobakov v zdravom strome potom znamena katastrofu. Zamorenie zravymi chrobakmi moze byt sposobovane faktormi globalneho oteplovania ako je teple pocasie pocas zimy a velmi sucha klima na miestach, kde je standardom vlhkost.Na ceste cez les kde je polovica stromov zjedena zvnutra a umierajuca priamo pred vami, citite sa smutno a velmi bezmocne a velmi maly, pretoze hmyz, este mensi od vas je schpny vziat vsetky krasu z lesov prec a vy nie ste schopny sa ich zbavit. Zakony prirody su ovela silnejsie ako zakony v spolocnosti ludskych bytosti, pretoze nemaju pravidla, ani ocakavania, ani ziadne preventivne opatrenia, ktore mozeme urobit. Ak pride tornado alebo zaplavy smeruju cez cely kontinent, nemozeme tento proces jednoducho zvratit, mozeme ho len prijat a vyrovnat sa s jeho nasledkami.Uradnici v Colorade nemaju silu zabit zrave chrobaky, ale mozu premyslat o tom, ako sa vyrovnat s chorobou lesa, ako ohranicit miesto zamorenia v Rocky Mountains a ako nasledne zorganizovat zivot po tom, co su chrobaky prec a les je viac nepouzitelny.

related story: http://news.yahoo.com/s/ap/20080114/ap_on_sc/bark_beetles;_ylt=AqSknKMcCI1o6E_yITNQGhes0NUE

by Natalia Holvova for PocketNews (http://pocketnews.tv)

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edited by Zuzana Lakostikova