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Ecosystems

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Delia Zavariz

on 27 August 2014

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Transcript of Ecosystems



Too Much of a Good Thing
Ecosystems
Food Webs
Diego Vargas A01205045
Benjamín Mendoza A01204950
Delia Zavariz A01204938

Biological Cycles
http://www.ucar.edu/communications/gcip/m4bgchem/m4overview.html
Biogeochemical Cycle
http://pmm.nasa.gov/education/water-cycle
Carbon Cycle
http://www.bgs.ac.uk/discoveringGeology/climateChange/general/carbonStory.html
Nitrogen Cycle
http://bioh.wikispaces.com/More+Elemental+Cycles
Phosphorus Cycle
http://andersonapes.pbworks.com/w/page/12868221/1st%20Period%20Phosphorus%20Cycle
Phosphorus
Component of ATP
Phospholipids
Nucleic Acids
Nitrogen Cycle
https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcTlv-33tADCecra1xQkkpQces8j5YbCpvhfjy-YOpcBWsOnjPBxqg
Organisms need Nitrogen
http://3.bp.blogspot.com/-NHgUUEE6Bbs/TtlAcpE14aI/AAAAAAAAACg/KmByWLcrzdY/s320/membrana+celular+formada+por+cerebrosidos.gif.
DNA
RNA
Plants
Soil water
take up
http://www.bio.davidson.edu/courses/molbio/molstudents/spring2005/carlson/atp%20synthesis.jpg.
Are eaten by consumers, and obtain N, then they come back to the soil by their excrement.
Denitrification
It can convert in contaminate if there is an excess
Lose of Nitrogen
Anaerobic conditions
Deep soil
Aquatic sediments
Nutrification
by fertilizers
Two-step
http://biomodel.uah.es/model2/lip/fig/detergente.png.
Ammonium, and nitrates
by detergents
http://www.ecologismo.com/wp-content/uploads/2012/10/contaminacion-agroquimicos.jpg.
=
Carbon Cycle
http://lh5.ggpht.com/_065z8oUaYKE/Su12Q1tov-I/AAAAAAAAG6k/dsiyaMOuTNc/2009-10-31-11h21m14-agua-contaminada.jpg.
Cycle
Atmospheric and biogeochemical
Moves among
Atmosphere, Oceans, Rocks, Soils, and Food webs.
Ecosystems
Plants
Atmosphere CO2
The nature of ecosystems
Ecosystem: "An array of organisms and a physical environment" (Starr,2013)
Photosynthesis
O2 into atmosphere
Soil
Living
oil
organism
Flow of energy in
ecosystems
Bacteria fungi descompose
Humus
Primary producers.
Autotrophs
CO2
into
atmosphere
Marine
http://colegioamerica.edu.uy/MATERIAL/BIOLOGIA/Seccion%208/55-10c.jpg.
Consumers
Heterotrophs
(HCO3-)
Bicarbonate
By photosynthesis
CO2
Aerobic respiration
Produced by
Fossil Fuels
High pressure and temperature
Ancient land, plant to coal
Burning this fuel
CO2 to atmosphere
Green House Effect
Reflect energy
Absorb gases
http://3.bp.blogspot.com/-tYgR7CHWEaI/T3RseIgdm8I/AAAAAAAAAFk/YBQ5Ti3uxaI/s1600/pico-del-lobo-25-10-08-059.jpg.
Descomposers
Feed on organic wastes
Types of consumers
Hervibores
Plants
Carnivores
Meat/animals
Parasite
Live inside a host and feed on its tissues
Omnivores
Plants and
animals
Detritivores
organic elements in descomposition
Descomposers
organic wastes and remains (fungi/bacteria)
Trophic Structure of ecosystems
Hierarchy of feeding relationships
Food Chain:
Description of who eats whom in one path of energy flow in ecosystem
http://www.sheppardsoftware.com/content/animals/kidscorner/images/foodchain/fullchain.gif.
http://erincourtneytheresa.wikispaces.com/file/view/food_web.jpg/132684607/food_web.jpg.
Ecological Pyramids
http://www.learner.org/workshops/sheddinglight/images/biomass.gif.
http://cleangreenenergyzone.com/wp-content/uploads/2011/03/energy-pyramid-ecosystem.jpg.
Energy pyramid
Biomass pyramid
References: Starr, C. , Taggart, R. (2013). Biology: The unity and diversity of life. Cengage Learning: USA
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