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How Does Food Complexity Affect the Biodiversity of an Ecosy

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Agus Cardano

on 16 September 2016

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Transcript of How Does Food Complexity Affect the Biodiversity of an Ecosy

Claim
As food web complexity increases, there is less stability in the population of the different species, causing as a result, biodiversity fluctuations in a more rapid and frequent way.
Simple Food Chain
-Small change in population early in the 100 day cycle
-Populations flatlined and stayed consistent throughout the rest of the 100 day period
Multiple Food Chains Together
-Less stability as it gets more complex
-Oscillation at the beginning
-Flat line occurs at the end like in Figure 1
How Does Food Complexity Affect the Biodiversity of an Ecosystem?
All Animals Have Equal Number Of Species To Eat
Top Predator Does Not Eat Omnivores
Justification of Evidence
-Many tryouts were done in order to ensure precision of results
-Argument was based on common results seen in the different experiments
-However, as the second limitation of science, humans may not be free of bias about their own results and hypotheses.
Species in Their Own Class Sharing Prey
Omnivores Eating Plants and Animals
-Repetitive change of populations due to competition for food.
-Win the fight = population goes up
-Losing = population goes down.
-Survival of the fittest mentality causes the frequency of the lines to increase radically.
-More consistency among populations, but still changing through time.
-Flat lines occur because omnivores had plants to eat as well, which caused more consistency
among the populations.
-Plants A and B fluctuate more.
-Most of the plants and herbivores go extinct
-Omnivore A's population increases rapidly
-A web like this cannot survive because there are a few species that take the most resources, while others decrease critically in population up to the limit of extinction, causing a big alteration of biodiversity. Ex: nonnative species with no predators introduced into another habitat.
-The increase in food web complexity causes an increase in the frequency of the waves in the graph.
-Conducted for an extra 100 days to see if the pattern continued, and it did.
Evidence
Ecosystems and Biodiversity Lab
By: Jose Enriquez and Agustin Cardano
Lionfish in South Florida
-Predatory fish native from Indo-Pacific waters
-Feeds on a variety of fishes and rustaceans, competing directly with native predators, such as snapper and grouper
Full transcript