Problem 7 - Campbell Biology Concepts & Connections

Question

With limited resources, conservation biologists need to prioritize their efforts. Of the following choices, which should receive the greatest attention for the goal of conserving biodiversity? a. a commercially important species b. all endangered vertebrate species c. a declining keystone species in a community d. all endangered species

Step-by-Step Solution

Answer

c. a declining keystone species in a community

Step 1: Understand the Question

The question asks which option should receive the greatest attention for conserving biodiversity. The choices include a commercially important species, all endangered vertebrate species, a declining keystone species in a community, and all endangered species.

Step 2: Analyze Each Option

Examine the impact of conserving each choice: - A commercially important species might not have a significant role in biodiversity. - All endangered vertebrate species is a broad choice, but it excludes non-vertebrates. - A declining keystone species plays a crucial role in maintaining the structure of an ecological community. - All endangered species is vast and may not be practical with limited resources.

Step 3: Evaluate the Keystone Species

Keystone species have a disproportionately large impact on their environment relative to their abundance. Conserving a keystone species can support the entire ecosystem, thereby conserving biodiversity more effectively.

Step 4: Make the Decision

Given the limited resources and the goal of conserving biodiversity, the option that addresses the core of ecological stability should be prioritized.

Key Concepts

biodiversity

Biodiversity refers to the variety of life on Earth, including the different species, genes, and ecosystems. It's crucial because a rich variety of life forms ensures ecosystem resilience. This means ecosystems can better withstand disturbances and continue to provide essential services like clean water, air, and food. High biodiversity also means more genetic variation and adaptability, ensuring that species can survive changes in the environment. Conservation biologists focus on preserving this diversity to maintain healthy and functioning ecosystems.

keystone species

A keystone species is one that has a disproportionately large impact on its environment relative to its abundance. Think of these species as the 'glue' that holds an ecosystem together. Examples include sea otters in kelp forests and wolves in Yellowstone. Losing a keystone species can lead to the collapse of the ecosystem, affecting many other species. Conservationists prioritize keystone species because protecting them means protecting the entire ecosystem. It's a strategic way to use limited resources for maximum ecological benefit.

endangered species

Endangered species are those at high risk of extinction in the near future. Factors like habitat loss, pollution, overhunting, and climate change contribute to their declining numbers. Protecting endangered species is crucial for maintaining biodiversity. However, with limited resources, it's often challenging to save all at-risk species. Conservation efforts must be strategic, often focusing on species that also help larger ecosystems, like keystone species. By concentrating efforts on these critical species, we can make significant strides in preserving broader biodiversity.

ecosystem stability

Ecosystem stability refers to an ecosystem's ability to maintain its structure and functions over time, despite external stressors. Stable ecosystems are vital for the survival of species and the continued provision of ecosystem services like food, water, and clean air. Biodiverse ecosystems are generally more stable because a variety of species can fulfill different roles and support each other. Conservation strategies often aim to enhance ecosystem stability by protecting vital species and habitats, ensuring the resilience and functionality of natural spaces.