BIO153-16-21-Conservation (1)

8/17/2019 BIO153-16-21-Conservation (1)

1/16

THIS WEEK IN BIO153

! Tuesday: Lecture 21: Ecology! Thursday: Lecture 22: Conservation biology! Friday: Tutorial 10

! Readings: Chapter 56! Lab 10: Lab Test II

Session ID:l |c


2/16

lego • jenga • therapy dogs • exh - “auction”healthy snacks • study space • music jam • crafts

tea • colouring station • exam prep • foosball

www.fb.com/utmExamJam www.utm.utoronto.ca/exam-jam

BIO 153

Tuesday April 5 th12:00pm – 1:30pm

IB 110


3/16

LECTURE 21:CONSERVATION BIOLOG

One person can make a di ! erence!What diversity do we conserve? How can we protect diversity?


4/16

DDT WAS THE WONDER WEAPON AGAINST INSECT PESTS

D ichloro d iphenyl t richloroethane


5/16

DDT ACCUMULATES IN THE

FOOD WEB

bio-accumulation-found out through routinemeasurements-chemicals accumulate in the foodchain

0.025-124ppm


6/16

EFFECTS OF THIS ACCUMULATION RANGE WIDELY

shells became so thin that when the mother falcon sat on her eggs to warm themthey broke - raptors (falcons hawks etc.) those are the ones we had the mostevidence for


7/16

ONE PERSON CAN CHANGE THINGS

starting the environmental movement-angered companies b/c DDT was making them a lot of money-loads of ppl read and finally governments had to act on it


8/16


9/16

THERE ARE MANY CAUSES FOR THE LOSS OF BIODIVERSIT

habitat loss is the biggest reason and overexploitation is disproportionately highin marine animal


10/16

WE ARE NOW EXPLOITING THE LAST CORNERS

Myers and Worm. 2003. Nature

1952 1958

1964 1980

Numbers of fish caught per 100 hooks in pelagic longline fisheries by Japanese vessels

catch-rate decreased incredibly-fished the oceans empty


11/16

BIOLOGISTS ALSO WORK ON PROTECTING SPECIES

Northern bottlenose whales

(Hyperoodon ampullatus)

the Gully is full of oil and gas but alsogreat diversity

marine protected diversity


12/16

HOW CAN WE PROTECT HABITAT AND SPECIES?

A TEMPORAL ASPECT

it take way longer birth and death rates toreturn to the level that they were beforethese areas were exploited-we might look at time scales that are waytoo short-included birth and death rates to ensure

that the population truly returns back tonormal conditions


13/16

HOW CAN WE PROTECT HABITAT AND SPECIES?

A SPATIAL ASPECT

what would we have to control to say that the difference that we see betweenconnected and unconnected areas is only due to this one factor and not something else- make sure that they include the same amount of area-in terms of area they are the same the only thing that differs is the shape


14/16

WHAT SHOULD THIS GRAPH LOOK LIKE IF

CONNECTEDNESS DOES NOT PLAY A ROLE?l |c

they discovered that connectedness is important-connected areas is way more effective in preserving species diversities thannon-connected areas


15/16

http://nationalgeographic.org/projects/photo-ark/

Joel Sartore


16/16

NEXT LECTURE PERIOD

Tutorial 10:Course review

and exam preview

David Bill @ FlickrCC

Documents

BIO153-16-21-Conservation (1)