Q54-12TYU An ecologist studying desert pla... [FREE SOLUTION]

Chapter 54: Q54-12TYU (page 1235)

An ecologist studying desert plants performed the following experiment. She staked out two identical plots, containing sagebrush plants and small annual wildflowers. She found the same five wildflower species in 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. After two years, four of the wildflower species were no longer present in the fenced plot, but one species had become much more abundant. The control plot had not changed in species diversity. Using the principles of community ecology, propose a hypothesis to explain her results. What additional evidence would support your hypothesis?

Short Answer

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Kangaroo rats contributed to the diversity of blooming plants by devouring the dominant plant and preventing it from dominating other flowering plants. In the absence of herbivore pressure, weaker flowering plant species couldn't compete with the dominant species.

Kangaroo rat grazing helps biodiversity in the region by consuming and distributing seeds.

Step by step solution

Community ecology

A rapidly growing and diverse branch of ecology is community ecology. Ecologists investigate the factors that influence biodiversity, community organization, species distribution, and abundance. These factors include a broad spectrum of interactions between species and with the abiotic environment.

Biodiversity

Biodiversity refers to the diversity and variability of living creatures and ecological structures on the planet. It is possible to observe a wide range of flora and fauna.

Their main range is from a bit of alteration to a massive shape. Aside from animals and plants, several microorganisms are not visible to the naked eye. These bacteria can be found in both water and soil.

Role of kangaroo rat in biodiversity

Giant kangaroo rats fulfill their role as a keystone species by clearing vegetation. They then consume plant seeds.As a result, they help create an ecosystem that is valuable to other endangered species and keep the dominant species under check.

Kangaroo rats contribute significantly to the habitats in which they inhabit. They may grow by consuming seeds and dispersing them, as well as building underground tunnels. This is good for the environment.