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pinkwasp332Lv1

29 Sep 2019

For one behavior of squirrels (looking for food, eating, chasing, cleaning, resting), hypothesize about the costs and benefits in relation to survival and reproduction. Draw one figure that would show how the time spent on this behavior could be optimized (e.g., benefits with respect to energy, costs with respect to predation risk).

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Reid WolffLv2

29 Sep 2019

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Subject: Principal of Ecology

Please explain in a Paragraph each question.

2. If you get a bit lucky while swimming on a coral reef, you may see a moray eel darting in and out of the nooks and crannies of the reef as it hunts. And, if you are really lucky, you may see a grouper swimming with the eel. Grouper are large, predatory fish, which, unlike the eel, cannot feed within the coral but instead must feed on fish above and next to it. Sometimes, the two species work as a team. Fish that are scared out of the coral by the eel become prey for the grouper while fish that flee the grouper for the safety of the coral are eaten by the eel.

This is an example of:

(A) mutually beneficial behavior

(B) selfish behavior

(D) spiteful behavior

Explain your answer.

3. The marginal value theorem can be used to make a number of predictions about how a central-place forager should behave. For example, it could be used to predict how large a load of seeds a pack rat should collect from patches that differ in their quality and in their distance from the ratâs burrow. Assume the pack rat is an optimal forager and use what you know about optimal foraging to answer the following questions:

Imagine that the pack rat could forage in either of two patches that differed only in their distance from its burrow. How should the time spent foraging and the load collected from the near and far patches compare?

Imagine that the there are two patches: open and bush. Food quality and density are identical and both patches are equal distances from the ratâs den. However, because the bush patch is more sheltered the rat can forage there in relative safety. How would you expect the difference in predation risk to affect models of the marginal value theorem?

Question:

Organisms living in Antarctica are thought to be particularly susceptible to change in climatic conditions. How might future climate changes affect the distribution of Antarctic organisms?

Describe the current Antarctic climate and factors that are likely to affect environmental change. Make predictions about future changes to the environment and how this might impact the distribution of organisms in the region.

Below has the format that it could be answered.

below the template, it has exampler template with different topic.

------ template

What do you think is the answer to the question? / What is your perspective on the topic? This is your stance or thesis.

Why do you think this? Give at least three supporting reasons (main points)

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-
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Use your stance and supporting points to build your plan. For each main point give a brief explanation, some evidence and/or examples you will use to support it. Provide references where appropriate.

I. Introduction

Possible ideas for the introduction:

(What does the reader need to know to understand the essay? Write as a statement rather than a question or keyword)

Proposed thesis statement:

II. Body - The number of body paragraphs will vary from essay to essay, you choose how many you need.

- Topic sentence:

(Include the main point making it clear how it supports your stance)

Explanations /Evidence/ Examples (include references with each fact (author, date)):

Write as a statement of fact not as a question, heading or keyword

- Topic sentence (include the topic and how it supports your stance):

Explanations /Evidence/ Examples (include references (author, date)):

Write as a statement of fact not as a question, heading or keyword

-Topic sentence (include the topic or how it supports your stance):

Explanations /Evidence/ Examples (include references (author, date)):

Write as a statement rather than a question or keyword

III. Conclusion:

(What are the broad implications of the essay?)

DRAFT WRITING

Introduction and first body paragraph

------- exampler template with different topic

I. Introduction

Possible ideas for the introduction

Climate change

Process of OA

Somehow lead to SO

Thesis Statement : All organisms living bathed in an acidic environment will incur a metabolic cost as a result of the energy expended to maintain functioning cell chemistry this results in reduced growth and reproductive outputs. As a consequence population numbers will drop with a flow on reduction in overall ecosystem biomass and diversity.

II. Body

Main Point: OA has a metabolic cost for all marine organisms and affects growth, reproduction and nutrient value as a food source.[CA2]

Examples/Details/Explanations (include references (author, date)) :

Most pronounced in small organisms but is variable and dependant on pH

e.g. krill, gill & haemolymph regulation issues (Flores et al, 2012) ;

e.g. phytoplankton, reduced nutritional value;

e.g. shell forming organisms dissolution of CaCO₃ shells e.g. pteropods

Main Point: The metabolic cost on the individual results in lower numbers of individuals in a population.

Examples/Details/Explanations (include references (author, date)):

This cost results in reduced fertilisation, extended larval development time, deformities

e.g. seastar (Gonzalez-Bernat et al, 2014) detail effects at different pH levels;

e.g. urchin (Sewell et al 2014)

Main Point: A reduction in biomass of any one species has flow on effects up and down the food chain and could be especially pronounced in the unique Southern Ocean ecosystem.

Examples/Details/Explanations (include references (author, date)):

SO characterised by high nutrient low productivity, âwasp-waistâ structure and short food chains

e.g. phytoplankton as primary producers

e.g. krill as important food source

e.g. pteropods as nutrient cyclers

Main Point: Reduced food availability will likely alter interspecific interactions and may result in some species being driven to extinction.

Examples/Details/Explanations (include references (author, date)):

a. competition will increase as a result of less food e.g. between larger birds and mammals as a flow on from loss of krill

b. shell forming species will be at greater risk of predation due to weaker shells

c. e.g. seastars as keystone species maintaining diversity

III. Conclusion

Effects at organism level will impact on total biomass of that species and those that depend on it for food, therefore the overall productivity and biomass of the SO ecosystem will be reduced and loss of species diversity is expected.

Other Ideas to Conclude:

Effects growth and reproduction and is especially costly for shell forming organisms.

Will see changes as a result of effects on organisms with key functions within the SO ecosystem.

Ideas to leave the reader with (clincher):

Global significance of effects of OA on SO (something related to carbon sink and sequestering of Carbon) or perhaps reminding reader that OA is only one consequence of climate change and that organisms will also be at risk from rising sea temps, melting ice, and invasive species.

Learning Objective: Compare and contrast two approaches of evolutionary psychology on human behavior

Best practice to participate in the discussion boards is to read the articles and consider the following questions. Then go to the discussion board and talk amongst yourselves; don't forget to post a minimum of a paragraph and reply to a colleague.

1. Some evolutionary psychologists, such as David Buss, suggest that men are more promiscuous than women. Man are hardwired for sex, wanting to have sex with as many women as possible. This is an evolutionary advantage, which gives men the opportunity to impregnate as many women as possible (i.e. to spread their seed). In addition, men prefer to have sex with women that are younger and have an hourglass shape. Both youth and a curvy figure are evolutionary signifiers of reproductive health. Buss also suggests that women are more selective in their mating and dating preferences. While men have a tendency to want to sleep around, women are choosier. Why? Because men have the ability to impregnate many women, while women can only have one offspring at a time. It is evolutionarily advantageous for women to be picky about their mates. What kind of mate to women prefer? They prefer mates with power and resources; men who can provide for the survival of their offspring. For our early ancestors this meant a man who could "bring home the bacon" now this means a man who brings home the money. Feminist evolutionary psychologists think this is just ridiculous. This type of thinking just portrays men and women as stereotypes.

2. Critics of the above theory demand: show me the physiological evidence. Evolutionary theory is rooted in biology hence there must be physical evidence to substantiate a claim. Feminist evolutionary psychologists say: It's not men who want sleep around, in fact, it is women who are hard-wired to want to take on as many mates as possible. This is why society has spent so much energy trying to regulate female sexuality. What is the evidence? One: only maternity is 100%. Everyone knows for certain the identity of their mother, yet before the recent advent of testing, paternity was never 100%. In a communal living situation, all the men in the tribe would have to provide for a child because the possibility could be that child was their own. Two: women are multi-orgasmic, while men only have one orgasm and then their brain releases a chemical which causes them to fall asleep. As many know, women become active post-coitus. They want to talk and cuddle, while men want to nap. The suggestion here is that while men are sleeping it off on the bear skin rug, the women go to the next tent and have sex again with someone else. Finally, women have an organ designed specifically for sexual pleasure: the clitori. Men do not have such an organ. The existence of the clitori is a strong physiological indicator that supports the above assertion. How can you explain the existence of the clitori?

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