Hey there. So today we're kind of talking about food webs and using that and word problems combined with math problems sounds a little daunting. Looks a little daunting, but it's really not that bad. So, um, let's start out with explaining what a food web is basically out of food web. You have the bottom part being the part that feeds the top eventually, right? So energy has to come from somewhere All animals have to eat. Figuring out what they eat is important. Um, and basically, whatever the bottom eats is essential distill feeding the top even though, like coyotes don't eat grass, they are eating grass through the deer and the rabbit. This is important in a lot of different situations, especially like if you have. If you are feeding predators, you should keep in mind about what they're pray eight and make sure that the prey that you feed them also eat that because those air actually essential parts of their nutrients as well. Okay, um, so food webs as a recap from the bottom, uh, bottom being, what feeds the thing that feeds the predator Or, you know, there could be some steps in between there, and the top is the predators. So on these predators, we have coyotes and hawks. Um, now looks like more directly deal with what we're doing. So you kind of just have to dissect your word problem. So it talks about your food web, and it tells you how big your food web. I mean, how big the meadow habitat is, which is the bottom part of your food web, which is 25.6 square kilometers. Um, I wrote that down here, As you can see, 25.6, and then I multiplied it by 1500 kilograms. And so together that equals 38,400. So I kind of put that down for meadow grasses. Um, next up were given some more information in the problem. Talking about basically what we're trying to figure out the end solution is, is if they approve this, let's think of it like an apartment complex and like a field or something like that. It'll reduce the producers biomass by 50% so that be like the bottom part, which is the meadow grasses. So if you think about it like an apartment complex, it's pretty easy Thio figure out why it would take up that like it's destroying grasses. There's people around yada yada. Next up, it says that it will remove all rabbits and deer. And that's important to note because, well, we'll get to that, actually. So these air basically the constraints that are put on that. Okay, so from that, we can figure out a few things. So through this math, we know that it's uniformly distributed, right? So we can figure out that the coyote and the Hawk are getting the same amount of stuff because the deer, the rabbit and the vole are getting the same resource is so, um, they are getting in this situation. It would be 10% of this, right? And so we're gonna put hope. Sorry. Working through these word problems is difficult, Which I'm sure is why you're reading this or watching this. Yes. So this is gonna be 1200 kg. This is also going to be 1200 kg. This is going to be 1200 kg, and then we kind of look at this and we say, Okay, so the vole is only going to the hawk. So if we multiply that by 10%. We get 120 13, and then over here, we should get 100 and 20 kg, and you're tempted just to put 120. 120. That's not the case, because this is being split. So it should be half of 122 64 kg, 64 kg. And this leads us, right? We add this up and we figure out these are 192 kg and 192 um, biomass of a hawk 192. That's what I wrote down there. This is, uh and you should kind of write this out. I would always suggest writing out these graphs and stuff that they're pretty simple because of AIDS in your visual understanding. Eso That's why I kind of wrote those. Like where the arrows go. Um, but now we know that we're reducing our metal grasses by 50%. Cross that out. We're gonna put 190. This is sad. Right? Um but also, the rabbit is removed and the deer is removed, so basically the vole is getting 10% which now equals 1920 kg. Um, from that we can figure out it's hard to do these word problems for everybody. Not just young. So, um 100. Okay, 1000 920 kilograms. So because of that, you kind of use your brain, right? And you go. Okay, So the coyote was Onley eating the deer and the rabbit. It's just preferential food because it's uniformly distributed. That means that the vole, it was only going to the Hawk. And now the bowl is out competing, Um, everything to the hawk. And now 192 kg are available to the hot because there is not, like any reason that the coyote can't eat the bowl. This means that the coyote will change its preference to feed on the Volt. See, there's no longer these resource is available to the coyote. And now the hawk is getting more food from than anybody. So we know that the coyote is going to have to change its reference. Um, that means that the answer is C. Yeah, maybe we figured it out. This is like a really complicated question. But even if you didn't do any of the math, right, you're a smart biology student and you can figure this out pretty pretty quickly, So if you go through Option A, it talks about the biomass of coyotes you know will be really small, and the biomass of Hawks will be really smaller than that. But that doesn't make any sense, right? Because we look at our food web even without any of the numbers. We know that thought that it's uniformly distributed. That's why I wrote that in the corner right there. So we know that that can't be true, because why would a hawk get less when it's the one? With Maurer of the resource available right and option B, the biomass of coyotes will be drastically reduced. Um, this is true. I mean, they did, but they're not just going to starve their opportunistic and so they're gonna figure things out so we can figure out that it's gonna be see just by that, right? Because that's the only one that could be true. But and then D let's look a D. It's 50% of your bowls and a lot less hawks. That doesn't make any sense. Just looking at the food web. The coyote is the one with left Resource is and now the bull has more resource is which I don't know if that's, like, plainly apparent. You kind of have to look at the food Web and do the math toe like see why that's the case, because it's kind of confusing just to look at. But you can figure it out. That's not true. Um, they're not getting 50% less. Resource is because all their competitors are gone. And so why would also, why would it be 90% fewer hawks? That doesn't even make any sense. So it has to be seat anyway. There you go. And I hope that helped you and your understanding of food webs and coyotes and how all this works. Have a great day. Bye bye.