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Ju4ed rosearch You havo bcen asked- Wldlife and NOAA, You hava - balp;#th by Seatto Parks. opportunity Eeleca Woodland Part Zoo project to conduct further work Sclc...

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Ju4ed rosearch You havo bcen asked- Wldlife and NOAA, You hava - balp;#th by Seatto Parks. opportunity Eeleca Woodland Part Zoo project to conduct further work Sclct = project and provide brief rescarch propos ? Your procosa sholdhdr Background Ihat explains the key Hypothesis that makes ecological prediction aboui thecshrepris Eud, that &e Telovant I0 YOlI proposed work mochanism justfy the prediction organism 5eemceh precist ecological Methods Athzl describe how you propose simulaton cond

Ju4ed rosearch You havo bcen asked- Wldlife and NOAA, You hava - balp;#th by Seatto Parks. opportunity Eeleca Woodland Part Zoo project to conduct further work Sclct = project and provide brief rescarch propos ? Your procosa sholdhdr Background Ihat explains the key Hypothesis that makes ecological prediction aboui thecshrepris Eud, that &e Telovant I0 YOlI proposed work mochanism justfy the prediction organism 5eemceh precist ecological Methods Athzl describe how you propose simulaton conduct your study camy Out the expenment fedd obserratons test the hypothesis model Graph Explaln the predicted resutts labeled . 4yor hypothesis were suppored by tne data_ with axes according mcasurements YOu plan take: [8 pts]



Answers

An ecologist studying plants in the desert performed the following experiment. She staked out two identical plots, which included a few sagebrush plants and numerous small, annual wildflowers. She found the same five wildflower species in roughly equal numbers on both plots. She then enclosed one of the plots with a fence to keep out kangaroo rats, the most common graineaters of the area. After two years, to her surprise, four of the wildflower species were no longer present in the fenced plot, but one species had increased dramatically. The control plot had not changed. Using the principles of ecology, propose a hypothesis to explain her results. What additional evidence would support your hypothesis?

Okay, So for this problem, we have a control plot and an experimental plots, and there are the same amount of borrow flowers in the same five species in each plot. So just gonna do this to make it easy? Because I don't have enough colors. So five different species, same amount, and this is our control. So see, for control, and then you for experiment. And in the experiment, everything is initially set up the same. Except there's an enclosure around it to keep out. Um, a kangaroo rat, which is apparently, um, you know, mingling with these with these wildflowers. So after two years passed, the experimental plot no longer looks like the control plot. There was one species, and I'm in the states species to that has significantly over taken this plot. Um, so the question is kind of why, um so So some evidence for you know what is going on here could be that the enclosure is keeping out the kangaroo rat. Um, in this particular species of plant, um, has the kangaroo rat is pretty much a predator, so when that it's around, it's keeping it from over growing eso. It doesn't just exponentially grow as much as it has in the experimental plot. So maybe taking the enclosure off would, um, then change the I can't very, um, would then maybe change the amount that has been growing from that particular species. Maybe maybe the other species of plants over here will will grow back now that the kangaroo rise is able to, um, kind of be that predator to that species that's taken over the plot. Another way to see what's going on is to remove Species number two in other plots, so create a new plot. Let's see what I can make this to create a new plot and on Lee put in its species 13 for in five. Um, you can enclose it or, you know, keep it open, depending on what you're trying to look out with the kangaroo rat. Being involved or not, um, and see if if the other species grow exponentially or not, is it? Is it a factor of you know that one particular species was the only one that was being affected by the kangaroo rat? Or does that particular species need the kangaroo rat for something? Or do these particular species need the kangaroo rat to toe act is like a fertilizer for them. Um, and that would tell you more about your hypothesis and if it was correct or not, um, and have additional evidence for you. Yeah, that's my solution to this problem.

Okay, So the question is asking. An Ecologist is studying desert plants and performed the following experiment. She created two identical plots containing sage brush plants and small annual wildflowers. She found the same five wild flower species to have roughly equal numbers on both plots. She then enclosed one plot with a fence to keep out kangaroo rats, the most common grain eaters of the area. Two years later, four of the wild flower species were no longer present in the fence plot, but one species had greatly increased in abundance. The control plot had not changed in species. Diversity, using the principles of community ecology proposed a hypothesis to explain her results and what additional evidence could support your hypothesis. Okay, so what's the right apotheosis and explain what else we would need, which I have right here. So let's talk about hypothesis. Kangaroo rat is essential for the reproductive cycle of the four wildflowers that disappeared, and it's detrimental to the species that flourished in its absence. So this is our educated guess as to why the results of this experiment are the way they are. Um, keep in mind, this is just my hypothesis. And there are many answers that many possible hypotheses that one could have. This is just the one that I have written, but so that is the hypothesis. So the further evidence we would need is in order to support this hypothesis, we would need to study the relationships of the kangaroo rat and the wildflowers to determine how influences them. And the disappearance and flourishing of the respective wild flower species could also been coincidence. And therefore we would need to repeat the study. So you would need to both see how the kangaroo rat influences each of these species and also repeat the process. Repeat the experiment in order to make sure that coincidence isn't the reason why you have your results and that is the answer. We're gonna circle it.

Is Ricky. And today I'm gonna be walking you through Problem number 12 from Chapter 54 the Camel Biology textbook. And so this question gives us an experimenter who is who dug out two plots of land. One is fenced up, the other one has no fans. And she plotted five types of different wallflowers. Um, when roughly equal amounts on both plots. And there are rats all around the area where, uh, kangaroo rats where she planted these wallflowers. What we find in the fenced off section, fenced off plot, you only have one type a wild flower left the rest off disappeared with no friends. We see all five of the original wallflowers still in around the same. Um, abundance. So what happened? Well, we can't tell much from this experiment, but my initial hypothesis is that rats helped increase the competition or rather not increase, but it alters well flower competition. And but we don't really know the mechanism of how this works. So in experiment that I propose that we d'oh would be experiment. I have five plots of land with each of different wildflowers. Add rat droppings, teach of the plot. No, actually, that should add 10 plots of land. Two, half of the plots. No rat droppings, the other half as a control. And what is this experiment accomplish? Um, well, you can determine if rat droppings were the cause of of an increase in fitness of a particular wildflower species by comparing the growth with and without rat droppings. President. All right. I hope this video was helpful, and I'll see you in the next one.

In this exercise, we're going to be considering a hypothesis test that is performed to determine whether uh the mean wing lands for two sub species of junkers, the migratory and the non migratory jungles are different. So the first thing we'll do is to specify the viable and in this case the viable is the wing land. Next we specify the population. Um The two different populations. Population one hand population too. Now population one is represented by the Migratory Juncos. Yeah. And population to is the non migratory juncos. Next we have the means of the two population populations. And the first one, New one is the mean with England of migratory Juncker's two. Two. Yeah. Yeah. And the second menu too is the mean England okay of the non migratory jungles. Mhm. Next, for the null hypothesis will have New one equals Mewtwo. And for the alternative hypothesis, uh we consider the sentence where we are trying to determine whether the main England's for the two suspicious are Different. So that means we're checking that new one is not equal to Youtube. And this hypothesis is a two tailed hypothesis. The two tailed test


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