A cat.
Estuary would be the most likely ecosystem where both algae and tadpoles can be found, as estuaries are areas where freshwater from rivers and streams mixes with saltwater from the ocean. This creates a unique environment that can support a variety of plant and animal species, including algae and tadpoles.
Just switch population with ecosystem to get them most to least complex.
there well be no animal on earth
A biologist or ecologist would typically observe organisms in the field or in a lab setting to study their behaviors, interactions, and characteristics. This helps to understand the organism's role in their ecosystem and how they are adapted to their environment.
An organism's interactions with both living and nonliving factors in its ecosystem, along with the role it plays in the ecosystem, are collectively known as its ecological niche. This niche describes how an organism fits into its environment, including its habitat, diet, behavior, and relationships with other species. Understanding an organism's niche is crucial for studying its impact on the ecosystem and predicting how it may respond to environmental changes.
they die
That would be human beings.
ecosystem because if it were to be an organism then the plant would have to do something with cells and the germ family and the saguaro cacti has nothing to do with cells and the germ family.
The food chain would expand, and the new organism would have new predators.
ecosystem
Without plants, the base of the ocean's food chain would be disrupted, leading to the collapse of the ecosystem. Plant eaters such as herbivorous fish rely on plants for food, and predators depend on plant eaters for sustenance. The absence of any of these groups would result in a chain reaction that would disrupt the balance of the entire ocean ecosystem.
If there was a oil spill the entire ocean ecosystem would be at risk.
One approach would be to conduct a removal experiment by removing the organism from the ecosystem and observing the effects on other species and ecosystem functions. If the removal leads to significant changes in species composition or ecosystem dynamics, it suggests that the organism is a keystone species. Another approach could involve monitoring the organism's population dynamics and ecosystem impacts over time to assess its role as a keystone species.
living things: fish, plankton, coral, seaweed, any organism non-living things: water, salt, rocks, litter, mud, sand
oak trees
It is probably the Arctic ecosystem, due to the much lower amount of organisms within the ecosytem.
Seaweed