Download Human Impact on Ecosystems ppt notes. studied human population

Human Impact on Ecosystems ppt notes.
_____________________ studied human population growth in the late
1700’s and said it was growing faster than _________________________.
Malthus’ predictions are used by modern scientists when describing an
_____________________ carrying capacity.
The current human population is about ___________ billion.
Humans have modified their environment though _______________________, _________________,
______________________________________, and _______________________, resulting in an increased
_____________________________________.
Technology allows for __________________________________________________.
The growing human population exerts ________________________ on the Earth’s natural resources.
Non renewable resources:
examples:
Problem:
Renewable resources:
examples:
Benefit:
As human population grows, _____________________________ of __________________________ and
________________________________ resources will be important.
The United States uses more _____________________ and generates more _____________________ than any
other country. _______________ of waste per person per year.
Effective _________________________ of the Earth’s resources will help meet the needs of the
_____________.
Ecological footprint:

Varies from __________________ to
_______________________

Developing countries like __________________ and ______________________ have a smaller
__________________ per individual, but many more ___________________.
Air Quality
Pollutants accumulate ___________________________________.
Pollution:
Effect of pollution may be ________________________ or
____________________ and effects may
________________________ and disrupt the functions of
__________________________________.
Smog:
Particulates: microscopic bits of __________________, _________________ and
______________________________ (1-10 microns in size)that are produced by many different
_______________________ processes.
Ozone:
Harmful to ______________________ and forms a
_______________________ layer in the atmosphere to protect
against _______________________ found in sunlight.
Acid rain: chemicals from ___________________________ can lead to the formation of
______________________, which can affect many ____________________.
Air pollution is changing the Earth’s ____________________________.
Scientist have been studying the periodic changes in the
Earth’s ______________________ and its relationship to
_________________________ levels.
Greenhouse effect: greenhouse gasses act like an ______________________ and slow the loss of
________________________ through the atmosphere.
Green house gases include :
Green house gases absorb:
Global warming: The trend of
___________________ global temperatures.
Changes are a ___________________ part of
Earth’s climate cycle.
the
______________________________ may be speeding up production of _________________________ gases and
________________________ warming.
Global average temperature increase of ________________________________ by the year 2100 are predicted.
This could dramatically effect the Earth’s ______________________.
Water Quality
Water pollution such as _______________________, ____________________
______________________ end up in rivers, ____________________ and
aquifers and affect __________________________.
&
Indicator species: a species that can provide a __________________ or
indication of the ___________________ of the ecosystems
______________________________________.
Examples include:
Biomagnification causes accumulation of _____________________ in the food
chain.
Biomagnification as a ______________________-- muves up the food chain as
concentration _________________________.
Many pesticides dramatically effect ____________________ level consumers.
its
Threats to Biodiversity
Preserving biodiversity is important to the future of the ________________.
Loss of _____________________ and growing _______________ problems are affecting _____________ and
_____________ populations around the world and has long term ____________ on the _________________of
ecosystems.
As human population grows and _____________ into new areas, they displace large numbers of _____________. This
loss of habitat __________________ species.
Habitat ______________________: when barrier forms that
prevents ____________________ from accessing its entire
___________________________.
It’s a growing ___________________ due to urban
________________.
People are beginning to address these ________________. One way
they are addressing problems are by building bridges across
_____________ to allow animals to ______________ safely.
Introduced species can disrupt _______________ relationships in
___________________.
Introduced species: any _______________ that was brought into an ______________ as the result of human
_____________. They can be _____________________ to native ______________________ by out
_____________________ them and driving them out.
Economic damage can have a major impact on ______________________ as well as on _________________________.
Conservation : sustainable ______________________________ manages resource for _______________________ and
_______________________ generations.
____________________ __________________________: a practice in which _____________________ resources are
used and managed in a way that meets current ___________________ without _____________ future generations. It
covers a wide range of __________________________________ and has changed the way we ____________________
natural resources.
Conservation practices focus on ___________________________ but benefit entire ecosystems.
Endangered species act: designed to protect _____________________ species by establishing _____________________
for oraganisms and its _____________________________.
Why are endangered species called umbrella species?
Saving an endangered species can benefit and entire _______________________________.
Protecting the Earth’s _____________________________ helps protect our ______________________. Global warming,
______________________ and loss of ______________________ are only a few direct threats to our planet.
Protecting natural resources:
Environmental Protection Agency (EPA) created as part of the
____________________________________________________ of 1970 and let to the development of
____________________ and regulations to protect the _____________________________ across the U.S.
Clean air _________________, clean water __________________________ endangered ___________________ act
have had major impacts on the _____________________________ and greatly increase public ___________________.
Formation of _________________________________ to preserve large areas of ________________________ has
protected ________________________________.
A sustainable earth: ______________________ represent an integral part of the Earth’s ___________________. We
have the ability to _____________________ how fast our ____________________ grows through controlling
________________________.
We can develop __________________________ to produce more ______________ and produce less
___________________.
We have the ability to ______________ our practices and take __________________ to protect and maintain
ecosystems.