1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)
-
Upload
corey-harvey -
Category
Documents
-
view
224 -
download
1
Transcript of 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)
![Page 1: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/1.jpg)
1.15 The Impacts of Human Industry on Ecosystems
(Sec 5.4 p 126-130)
![Page 2: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/2.jpg)
• Human activity affects ecosystems!
![Page 3: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/3.jpg)
• Agricultural activities affect ecosystems in a number of ways:– Changing the land from a natural ecosystem (e.g.
grassland, forest) to an artificial one (e.g. pasture, fields); this vastly reduces biodiversity
![Page 4: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/4.jpg)
• Agricultural activities affect ecosystems in a number of ways:– Addition of fertilizers can accumulate in the rivers
and lakes, and poison food.
![Page 5: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/5.jpg)
• Agricultural activities affect ecosystems in a number of ways:– Soil degredation occurs when fertile topsoil is lost
due to erosion and/or when soil nutrients are depleted; can occur when fields are left to fallow.
![Page 6: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/6.jpg)
• Scientists are trying to come up with ways to farm more ‘ecologically’, but maintain yields.
![Page 7: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/7.jpg)
• Forestry practices (harvesting timber from forests) has big ecosystem effects too:
• Clear cutting completely destroy habitat (animals, plants, bacteria, soil affected)
![Page 8: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/8.jpg)
• Firewood adds to CO2 to atmosphere (~ half of world harvest of wood burned for fuel!)
![Page 9: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/9.jpg)
• Deforestation occurs when trees are cut and not replaced (replanted); can occur due to urban development (housing) or agriculture; habitat is totally gone
![Page 10: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/10.jpg)
• Fisheries affect ecosystems:• Overharvesting fish can cause the ecosystem to
become unstable and collapse.
![Page 11: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/11.jpg)
• By-catch occurs when industrial fishing operations catch non-target species, leading to ‘waste kill’ (the animals are killed for no good reason).
![Page 12: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/12.jpg)
• Fish farming practices can lead to increased disease rates and pollution, and can have detrimental impacts on wild populations of fish and other organisms.
![Page 13: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/13.jpg)
• Traditional ecological knowledge and wisdom (TEKW) is possessed by people of indigenous cultures around the world, who have a unique understanding of their environment, and know how to live sustainably.
• There is a growing body of interest in adopting TEKW practices in agriculture and resource management.
• In many ways, people have already taken advantage of TEKW (e.g. many western medicines derived from plants used by indigenous peoples for thousands of years).
![Page 14: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/14.jpg)
![Page 15: 1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649e755503460f94b75c80/html5/thumbnails/15.jpg)