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Title: Food webs question- prairie animals and plants Post by: ATGC on May 31, 2015 Hello!
In Bio lab, we were creating food webs. Unfortunately, one of them I just can't figure out even though it seems to be easy. These are the prairie animals and plants. We were supposed to organize them into a food web. grass, daisies, sunflowers, lupines, ticks, grasshopers, butterflies, bees, rats, coyotes, hawks, badgers, fungal and bacterial species. Can someone please help me with that? Also, a fairly easy question: why do scientist estimate population size? This is a question that will also appear on the final lab practical I have this coming Thursday. Thank you!!!! Title: Re: Food webs question- prairie animals and plants Post by: psyche360 on May 31, 2015 Also, a fairly easy question: why do scientist estimate population size? This is a question that will also appear on the final lab practical I have this coming Thursday. Population size is extremely important in evaluating conservation priorities for a species. Small populations are at risk of going extinct because of demographic stochasticity and genetic drift. Title: Re: Food webs question- prairie animals and plants Post by: dtimmons95 on May 31, 2015 Some animals can be very aggressive about their territory, so higher density can be bad for them.
It's important to monitor sharp population changes so that the food chain won't be grave danger. If, for example, too many tigers have been sighted; tigers will eat all the zebras. Since the zebras eat herbs (If i'm not mistaken), those herbs population will grow too much and can change the environment in a bad way, like growing and killing all the fish because they have no place to swim in the water. (https://biology-forums.com/gallery/47/6_31_05_15_10_05_17.gif) (https://biology-forums.com/index.php?action=gallery;sa=view&id=22003) (https://biology-forums.com/gallery/47/6_31_05_15_10_06_13.gif) (https://biology-forums.com/index.php?action=gallery;sa=view&id=22004) |