Presentation given by Chris Swanston to the the Hudson to Housatonic (H2H) Conservation Initiative for the H2H Conservation in a Changing Climate workshop on December 11, 2014.
Presentation given by Chris Swanston to the the Hudson to Housatonic (H2H) Conservation Initiative for the H2H Conservation in a Changing Climate workshop on December 11, 2014.
Plenary 2 - Social Impacts of Global Climate Changerbulalakaw
Presentation of Prof. Natividad Lacdan,
College of Arts and Sciences, University of the Philippines Manila, during the UP Manila Conference on Global Climate Change, held October 22-23, 2009 at the Pearl Garden Hotel, Manila.
Global Warming and Climate Change Group-7.pptxSN Showrov
This is was a simple presentation task assigned in a B.Sc. civil engineering course of AUST.
Different information and necessary pictures from different sites were included and combined presentation slide was formed on topic of "Global Warming and Its reasons:Man made or otherwise".
This slide is only for study purpose and a sample one on how to make a similar slide regarding global warming highlighting other reasons.
1. Biology Unit 2, Chapter 16 (Changes in ecosystems)
Thursday, 11th
October, 2012.
Class duration: 70 mins
Class setting: Science laboratory
Topic: Changes in Ecosystems (Intro)
Learning intention:
• To develop understanding of changes to ecosystems over time.
• Recognise the scope, intensity and impact of various natural changes
• Extend awareness of impacts of human-induced changes on ecosystems
• Identify techniques for monitoring and maintaining ecosystems.
Thursday, 11/10/2012
• Unit 1 revision questions
• Group presentation (preparation)
Time (mins) Teacher activity
20 - Intro video
- Discuss frequency of change
- Give example: Climate change (other examples of climate change?)
SLIDE 3
- Pollutants have water vapour adhered to it = man made clouds.
- Clouds hold HEAT in. So no clouds = colder.
- After 9/11, shut down jet traffic in USA for three days.
- Scientists able to observe during that 3 day period, there was about 1*C change over the 3
days.
- This change over a long period = climate change… can impact ecosystems.
SLIDE 4
intergovernmental panel on climate change
- Different countries put their data together
- Study how changes in temperature affect our planet
- Raise in temperature affect arctic ecosystems more than ecosystems closer to equator.
- Impact on the species that have evolved to live in cold temperatures.
SLIDE 5
1ºC change over next 100 years
- All coral becomes bleached.
- Coral made up of two things = a coral (essentially an animal) + algae (plant, lives
mutualistic with them)
- Coral will extrude (force out) the algae, so can’t use photosynthetic process of
algae = bleached.
Increase temperature = warmer.. Affect 10% of world’s ecosystems.
- Affect arctic ecosystems more.
- Species can’t evolve quickly enough to adapt to the change in climate = impacted by
that.
SLIDE 6
2ºC change over next 100 years
SLIDE 7
3ºC change over next 100 years
- 1/2 of nature reserves unable to meet conservation objectives
- Manmade change… Environment impacted by humans.
… Slide 8
2. SLIDE 9
Primary change
Due to human intervention or natural agents
20+10 SLIDE 10 & 11 [ACTIVITY]
PRIMARY CHANGES
- Manmade change: Introduction of exotic/alien-species
o Noxious species, e.g. rabbits, cane toads. Page 510.
- Manmade change: Overharvesting of a biological resource (e.g. fishing too much, hunting
of animals) page 517.
- Natural change agents: Bushfires. Page 528.
o Obligate seeder plants (seeds survive and germinate after fires)
o Vegetative reproducer plants (regrow through means of (epicormic)buds located
under bark or in underground stems/rhizomes)
o Fire is important agent of change in some Australian ecosystems (e.g. page 531
“fire for parrots”)
-
10 SLIDE 12
Primary succession: ecosystem must rebuild after being completely destroyed (including the
soil)
- Main feature of primary ecological succession = soil formation.
- Rock exposed of receding glacier
- New land formed by volcanic explosions
- Mosses and lichens (spore bearing plants) = pioneer organisms…
- Lichens secret toxins into rocks = break down into soil
- Wearing down of rocks by weather/water = form soil
- When mosses and lichens die = biomass degrades into soil
Secondary succession: ecosystem must rebuild with the soil still intact.
- e.g. small bushfire… doesn’t have to go through process of soil formation…
- No pioneer organisms because there are already organisms in and around soil.
- Process of succession stops when a stable community becomes established.
- Stable community = climax community.
10 SLIDE 13: KEY IDEAS
Frequency of change:
Changes in ecosystems may occur regularly, sporadically, or due to one-off events.
(1) Identify a change agent that acts on an ecosystem as follows:
Regularly, sporadically (irregularly), or as a one-of event.
(2) Give an example of change in an ecosystem that is due to:
a. human intervention… b. a naturally-occurring agent of change.
- Invasive exotic species cause negative effects in ecosystems.
- Over-harvesting of a biological resources can cause populations to crash.
- Fire is an important agent of change in some Australian ecosystems.