II. The Living Planet A. The Earth System. ENERGY MATTER ENERGY First and second laws???? INPUTSBOUNDARYOUTPUTS.

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Presentation transcript:

II. The Living Planet A. The Earth System

ENERGY MATTER ENERGY First and second laws???? INPUTSBOUNDARYOUTPUTS

WHAT PHILOSOPHICAL APPROACH MIGHT WE USE TO FIGURE OUT HOW THIS SYSTEM WORKS???

...reductionism... define, describe, and understand the subsystems ENERGY MATTER ENERGY INPUTSBOUNDARYOUTPUTS ATMOSPHERE LITHOSPHERE HYDROSPHERE

A. The Earth System 1. Lithosphere crust - dynamic mobile tectonic plates; vulcanism upper mantle

A. The Earth System 1. Lithosphere Why and how is the lithosphere important to life?

A. The Earth System 1. Lithosphere Why and how is the lithosphere important to life? 1)Source of inorganic nutrients (P, K, Na, Ca) 2) Movements of plates explain the distribution of life forms. Marsupials evolved in the southern hemisphere and radiated across the supercontinent before separation of the land masses.

A. The Earth System 2. Atmosphere 78% Nitrogen Gas (N 2 ) 21% Oxygen Gas (O 2 ) 1% traces of: Noble Gases Carbon Dioxide (CO 2 ) Hydrogen Gas (H 2 ) Methane (CH 4 ) water vapor (H 2 O)

A. The Earth System 2. Atmosphere How is this important to life?

A. The Earth System 2. Atmosphere How is this important to life? 1) Source of inorganic nutrients (N, O 2 )

A. The Earth System 3. Hydrosphere - 98% liquid water - Ocean: 97% (1.35 billion km 3 ) 3.5% dissolved salts by volume - Freshwater: 3% (48 million km 3 ) Ice: 2/3 (33 million km 3 ) Groundwater: 1/3 (15.3 km 3 ) Soil: trace (122,000 km 3 ) Rivers/Lakes: trace (40,000 km 3 ) Air: trace (13,000 km 3 )

A. The Earth System 3. Hydrosphere - 98% liquid water How is this important to life?

A. The Earth System 3. Hydrosphere - 98% liquid water How is this important to life? 1) It is the environment of life – reactions between soluble compounds occur readily in liquid water… and more in a moment.

WHAT OTHER PHILOSOPHICAL APPROACH COULD WE USE TO DETERMINE WHETHER THE EARTH SYSTEM IS "TYPICAL"?

II. The Living Planet B. Comparing Earth, Venus, and Mars

EarthVenusMars CO %96%95% N2N2 77%3.5%2.7% H2OH2O1%0.01%0.007% Ar0.93%0.007%1.6% O2O2 21%trace Atmospheric Composition Venus and Mars are fairly similar. But where did all Earth's CO 2 go? And where did all the O 2 come from????

II. The Living Planet B. Comparing Earth, Venus, and Mars 1. Liquid water has changed our planet: - takes CO 2 out of atmosphere (dissolution) - erodes lithosphere the two things put carbon and mineral nutrients into solution, where they can react with one another, and be taken up by....

Carbon-Based Life Forms!!

II. The Living Planet B. Comparing Earth, Venus, and Mars 2. LIFE CHANGES OUR PLANET - increases rates of flux between other subsystems (evapotranspiration, nutrient uptake, respiration) - Changes the composition of subsystems - Life transports CO 2 from the atmosphere to living tissues or its products (Calcium Carbonate shells), which settle in sedimentary strata of carbonaceous rocks (limestone and derivatives) and fossil deposits (oil, gas).

Coccolith - a phytoplankton White cliffs of Dover

II. The Living Planet B. Comparing Earth, Venus, and Mars 2. LIFE CHANGES OUR PLANET - increases rates of flux between other subsystems (evapotranspiration, nutrient uptake, respiration) - Changes the composition of subsystems - Life transports CO 2 from the atmosphere to living tissue or its products (shells), which settles in sedimentary strata of carbonaceous rocks (limestone and derivatives) and fossil deposits (oil, gas). - Photosynthesis releases O 2. That is where ALL of the Earth's oxygen gas has come from.

A. The Earth System 3. Interactions (fluxes) LITHOSPHERE ATMOSPHERE Volcanic gases, Particulates HYDROSPHERE Precipitation Evaporation Sedimentation Erosion

A. The Earth System 3. Interactions (fluxes) LITHOSPHERE ATMOSPHERE Volcanic gases, Particulates HYDROSPHERE Precipitation Evaporation Sedimentation Erosion BIOSPHERE

I. WHAT IS LIFE? II. The Living Planet A. The Earth System B. Conclusions - The current conditions on the Earth that support human life and culture are produced by the dynamic interplay of the earth subsystems - the BIOSPHERE IS CRITICAL HERE. - Change the subsystems and alter the dynamics. - Will future conditions support human life.....?

III. What is Ecology? A. Definitions:

III. What is Ecology? A. Definitions: Ricklefs - “The study of the interactions of organisms with one another and with their environment”

III. What is Ecology? A. Definitions: B. Biological Scales

Primary Producers fix energy in sunlight and build/absorb organic molecules….some bacteria, some protists, and plants. Consumers eat primary producers, decomposers, and other consumers as herbivores, detritivores, predators, and parasites… some bacteria, some protists, and animals. Decomposers eat dead material and release nutrients to the soil. Bacteria and fungi. III. What is Ecology? A. Definitions: B. Biological Scales C. Ecological Roles

III. What is Ecology? A. Definitions: B. Biological Scales C. Ecological Roles D. Effect: Distribution and abundance

Distribution and abundance across space

Distribution and abundance through time TIME

IV. Why is it Important?

A. Pragmatic Reasons

IV. Why is it Important? A. Pragmatic Reasons

Human Ecology: - distribution...

Human Ecology: - distribution...

Human Ecology: - distribution...

Human Ecology: - distribution...

Human Ecology: - distribution...

Human Ecology: - distribution... and abundance...

Human Ecology: - distribution... and abundance... Born 1928 (3.5x) Born 1960 (2.1x) Born 1987 (1.5x)

Humans affect 83% of the land surface area on the planet

Industrialization has allowed us to become a geological force, acting at rates millions of times faster than natural processes

2012: 391 The Earth has become a human-dominated system…

IV. Why is it Important? A. Pragmatic Reasons B. Sustainability

IV. Why is it Important? A. Pragmatic Reasons B. Sustainability Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs.

IV. Why is it Important? A. Pragmatic Reasons B. Sustainability Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs. How?

IV. Why is it Important? A. Pragmatic Reasons B. Sustainability C. Biodiversity

And that’s why all FU students must take a Humans and the Natural Environment class…