Ns 435 unit 2 impact of ecological changes on agriculture
This presentation is the property of its rightful owner.
Sponsored Links
1 / 21

NS 435 Unit 2: Impact of Ecological Changes on Agriculture PowerPoint PPT Presentation


  • 100 Views
  • Uploaded on
  • Presentation posted in: General

NS 435 Unit 2: Impact of Ecological Changes on Agriculture. Lei Wang, Ph.D. How Ecological Changes Affect Agriculture/Food Production? Short-Term Effects Long-Term Effects How Modern Agriculture Impacts the Climate? Alternative Solutions/Opportunities?. Outline.

Download Presentation

NS 435 Unit 2: Impact of Ecological Changes on Agriculture

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Ns 435 unit 2 impact of ecological changes on agriculture

NS 435 Unit 2:Impact of Ecological Changeson Agriculture

Lei Wang, Ph.D.


Outline

  • How Ecological Changes Affect Agriculture/Food Production?

    Short-Term Effects

    Long-Term Effects

  • How Modern Agriculture Impacts the Climate?

  • Alternative Solutions/Opportunities?

Outline


Food for thought

According to Siikamaki, (2006) “Agriculture is frequently discussed in the context of climate change: not only is agriculture vulnerable to climate change, it is also part of the problem and its potential solutions.”

-Siikamaki, Juha. (2006). Climate Change and U.S. Agriculture. Examining the Connections. Environment, pg(s). 36-49.

Food for Thought


Climate context

According to Peter Backlund from NCAR,

“Human activities have altered the global climate.

During the 20th century, the global average surface

T increased 0.6 C and global sea level

increased 15 to 20 cm.”

  • -Backlund, P., Janetos, A., and Schimel, D. Executive Summary: The Effects of Climate Change on Agriculture, Land Resources, Water Resources, and Biodiversity, pages 1-10.

Climate Context


Climate context1

“… human influences will continue to change Earth’s climate throughout the 21st century. The global average T will rise another 1.1 to 5.4 C by 2100. Which will result in continued increases in sea level and overall rainfall.”

  • -Backlund, P., Janetos, A., and Schimel, D. Executive Summary: The Effects of Climate Change on Agriculture, Land Resources, Water Resources, and Biodiversity, pages 1-10.

Climate Context


Examples of ecological factors

  • Temperature

  • Precipitation

  • CO2 concentrations

  • Water availability

  • Change in pest populations, plant diseases, and weeds.

Examples of Ecological Factors


How may ecological changes affect agriculture food production

  • Drought/Flooding: (extreme weather events)

    • Soil moisture/erosion, evaporation

  • Water pollution (i.e. agricultural run-off)

  • Heat Stress w/ rising temps– crops, livestock

  • Pollution levels (soil & H20)

How May Ecological ChangesAffect Agriculture/Food Production?


How may ecological changes affect agriculture food production1

  • Increased pests, disease, weeds

  • Some crops more sensitive to rising temps (tomatoes– e.g.)

  • Altered Food Webs (e.g. polluted waters- marine food webs)

How May Ecological ChangesAffect Agriculture/Food Production?


Short term effects of climate change on agriculture

  • Some crops– may improve growing conditions

    - however, with continued temp increase (esp. Southern regions) some crops may not adapt.

    - Northern regions may benefit most (since tend to be cooler.) e.g. longer growing season opportunity.

    -- Possible to grow new crops/different crops.

Short-Term Effects of Climate Change on Agriculture


Long term effects climate change

  • Long-term effects of climate change are not fully understood.

  • Difficult to predict.

Long Term Effects & Climate Change


Earth s future climate

  • A vast majority of climate scientists agree that Earth will warm along with increasing greenhouse gases. However, the effects will be far more varied than a simple and uniform warming over the entire planet.

Earth’s Future Climate


Earth s future climate1

  • Translate temperature changes from a model into trends that affect people's everyday lives. A 2004 NCAR study found that, by the period 2080-99, American and European heat waves will be more severe, frequent, and long-lasting.

Earth’s Future Climate


Earth s future climate2

  • Another related study found that frost days will decline in many parts of the globe by 2080-99. The largest decreases are projected across the northwest parts of Europe and North America.

  • Such a change would affect agriculture and tourism as well as natural ecosystems.

Earth’s Future Climate


Ns 435 unit 2 impact of ecological changes on agriculture

Questions?


How modern agriculture impacts the climate

  • GHG emissions (burning of fossil fuels, manure, food transportation– e.g.)

  • Significant user of H20 resources.

  • Significant user of land resources.

How Modern AgricultureImpacts the Climate


How modern agriculture impacts the climate1

  • Livestock– methane emissions

  • Factory Farming- e.g. (produce large amount of GHG)

How Modern AgricultureImpacts the Climate


Ns 435 unit 2 impact of ecological changes on agriculture

Questions?


Alternative solutions opportunities

  • GMO’s– e.g. resistant to drought/flooding

  • New, more tolerant crops

  • More irrigation, water storage

  • Agriculture & Forests = GHG “sinks”

Alternative Solutions/Opportunities?


Alternative solutions opportunities1

  • Methane capture “tanks”

  • Increase irrigation efficiency

  • Focus on locally produce foods– e.g. Farmers Markets

  • Improved fertilization practices– e.g. timing

Alternative Solutions/Opportunities?


References

  • Backlund, P., Janetos, A., and Schimel, D.

    Executive Summary: The Effects of Climate Change on Agriculture, Land Resources, Water Resources, and Biodiversity, pages 1-10.

    -Retrieved from:

    http://www.usda.gov/oce/global_change/files/SAP4_3/ExecSummary.pdf

  • Siikamaki, Juha. (2006). Climate Change and U.S. Agriculture: Examining the Connections. Environment, pgs. 36-49.

  • Retrieved from:

    http://kucourses.com/ec/courses/24739/CRS-NS435-3407037/Unit_2_Climate_Change_and_US_Agriculture.pdf

    Earth’s Future Climate: http://www.ncar.ucar.edu/research/climate/future.php

References


Ns 435 unit 2 impact of ecological changes on agriculture

Questions?


  • Login