EVS 1101 Lecture 14: EVS 1101- March 14 Lecture Notes

• School: University of Ottawa
• Department: Environmental Science
• Course: EVS 1101
• Professor: Danielle Fortin

Document Summary

Know how to structure a food web and give examples. Co(cid:374)tri(cid:271)ute to for(cid:373)atio(cid:374) of o(cid:454)(cid:455)ge(cid:374) that"s used to (cid:271)ur(cid:374) off the e(cid:374)erg(cid:455), sour(cid:272)e of energy as an electron donor. Ecosystem engineers: beavers create dams which create a new environment for other species. Invasive species, avian botulism and deaths: linking the anoxia to the death of birds and fish. Movie: little things, big problems- aquatic invaders: zebra mussels, quagga mussels and round goby are invading lake. Michigan: they affect the ecosystem and food web. 2: avian botulism food die offs: birds get sick from toxin growth caused by the mussels, the mussels ingest these toxins, then round gobies eat the (cid:373)ussels a(cid:374)d the(cid:374) the(cid:455) are i(cid:374)fe(cid:272)ted. Controlling invasive species: change the pipes once the zebra mussels get in, techniques to control invasive species: Stressing them (heat, sound, electricity, co2, uv rays: prevention rather than control is the best policy.