The open ocean and tropical rain forests contribute the most to Earth's net primary production because
a. Both have high rates of net primary production
b. Both cover huge surface areas of Earth
c. Nutrients cycle fastest in these two ecosystems
d. The ocean covers a huge surface area, and the tropical rain-forest has a high rate of production

Question

The open ocean and tropical rain forests contribute the most to Earth's net primary production because

a. Both have high rates of net primary production

b. Both cover huge surface areas of Earth

c. Nutrients cycle fastest in these two ecosystems

d. The ocean covers a huge surface area, and the tropical rain-forest has a high rate of production

Accepted Answer

Welcome back. Let's look at our next question. It says which of the following tropical rainforest components primarily contributes to the biome primary productivity. So we think about um productivity and primary productivity. Um We think about the organisms that produce energy and produce energy on their own. They don't have to consume it from another source. They're able to produce their energy themselves. And of course, on land in a rainforest, the primary producers are green plants harvesting the sun's energy through photosynthesis. So let's look at our answer choices. What we see. First thing we see is plants aren't a choice. So we need to kind of dive a little deeper here. But choice A says auto troughs. Well, auto troughs are those organisms that produce their own energy. So that will be our answer choice here. Since the green plants, the primary producers um in the rainforest do produce their own energy. So choice A autotrophs, then let's move on and look at the other answer. Choices. Choice B is hetero troughs, hetero troughs have to consume producers to obtain energy. And so they can't be the primary producers because they consume producers. So they're not the right answer. Choice C says primary consumers. Again, these are consumers, they're not producers and therefore can't be the answer. And finally choice D decomposes well, decomposes obtain their energy, they obtain it from the organic compounds they ingest from eating the dead um organic material, dead plants, dead animals. But those organic materials come ultimately from the primary production of the plants. So they are not our answer either. So which of the following tropical rainforest components primarily contributes to the biomes, primary productivity choice. Say auto troughs. See you in the next video.

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Key Concepts

Net Primary Production (NPP)

Ecosystem Surface Area

Nutrient Cycling