[lemma=web] [tag=□]
[lemma=web] [tag=TO]
We depend on two food webs to obtain the energy and materials necessary for life . Increasingly , newspapers are turning to the Web to find the revenue that keeps them in business . The habit of abandoning webs to feed outside during the last instars prior to pupation is apparently typical of black-race larvae in the southern region ( 2 ) . Larvae fed in colonies until about the first of August ( approximately 45 days ) then left webs to pupate . Questions have been raised about access from the Web to other Web sites , about how publishers ' / vendors ' Web pages are set up , about printing when access is via Adobe Acrobat , and about user education and support issues . A heavily forwarded e-mail that became the subject of an article in the Wall Street Journal a week later on the widespread use of the web to communicate the tragic news of the day . Moreover , such a path makes it possible to convert the hypertext web to a conventional linear text , which could be printed out as a book . Some species are web builders that use webbing to ensnare their prey . Finally , I used stable isotopic analyses of the littoral and pelagic food webs to determine food web structure . Alien invasive species wreak all sorts of ecological havoc , from disrupting food webs to displacing native species to altering ecosystem processes . Many spiders use webbing to ensnare their prey .