Untitled Quiz

<p>The trophic level of a species is one more than the chain length (A)</p> Signup and view all the answers

<p>Food webs consist of multiple interconnections of food chains (B)</p> Signup and view all the answers

<p>Predation on minor species is often omitted from analysis. (A)</p> Signup and view all the answers

<p>Chains are shorter and simpler. (C)</p> Signup and view all the answers

<p>Web boundaries are often hard to define and may vary. (D)</p> Signup and view all the answers

<p>One to one. (C)</p> Signup and view all the answers

<p>There are species that exhibit changes in diet based on age or size. (A)</p> Signup and view all the answers

<p>Source webs, sink webs, community webs (B)</p> Signup and view all the answers

<p>Connectance (A)</p> Signup and view all the answers

<p>The average number of interactions per species (A)</p> Signup and view all the answers

<p>Cycles between species are common. (C)</p> Signup and view all the answers

<p>The feeding relationships and levels in an ecosystem (D)</p> Signup and view all the answers

<p>Top predators, intermediate species, and basal species remain constant. (B)</p> Signup and view all the answers

<p>Chain lengths are generally the same. (D)</p> Signup and view all the answers

<p>$\frac{actual,number,of,interactions}{n(n-1)}$ (B)</p> Signup and view all the answers

<p>The links a species has relative to the total number of links (A)</p> Signup and view all the answers

<p>Species interaction types (D)</p> Signup and view all the answers

<p>Energy can only be transformed from one form to another. (D)</p> Signup and view all the answers

<p>Energy used by plants for growth after respiration. (B)</p> Signup and view all the answers

<p>Availability of primary productivity. (B)</p> Signup and view all the answers

<p>Phosphorus cycle. (A)</p> Signup and view all the answers

<p>Some energy is transformed into heat and lost. (D)</p> Signup and view all the answers

<p>They decompose organic matter and recycle nutrients. (C)</p> Signup and view all the answers

<p>It decreases progressively toward the poles. (B)</p> Signup and view all the answers

<p>The recycling of nutrients. (C)</p> Signup and view all the answers

Species interacting with their physical environment and other living organisms.

The feeding relationships among organisms in an ecosystem.

Different positions in a food chain, ranked in order of how they get their energy.

Complex network of interconnected food chains.

Organisms that feed on decaying matter.

Food chains in grasslands tend to be shorter than those in forests or reefs.

The ratio of the number of prey to the number of predators in a food web is approximately 1:1.

Predation on less common species is often overlooked, making food web links less accurate and complete.

Food web models often lack data on how much food is consumed by each species, making it difficult to understand the strength of the links.

Groups of species within a food web that exploit the same resources. They are a functional classification of ecological roles.

Food webs are categorized into source webs (sources and consumers), sink webs (consumers and prey), and community webs (species groups in a habitat).

Food webs help understand ecosystem structure and organization; connectance and linkage density are key metrics.

Connectance measures the relative complexity of a food web, comparing actual interactions to potential ones.

Linkage density (d) describes the average number of links per species in a food web.

A species eating a combination of plants and animals.

The number of steps in a food chain (e.g., producer to top predator).

The ratio of actual trophic interactions to possible trophic interactions in a food web.

Number of actual trophic interactions divided by the maximum number of possible interactions.

Food webs often have consistent ratios of species by trophic levels.

Energy cannot be created or destroyed, only transformed from one form to another. It's like transforming a block of wood into a table; you're changing its form, not creating or destroying the wood itself.

Energy transformations always result in some energy loss as heat, decreasing the potential energy available for work. It's like a leaky bucket - you lose water (energy) as you carry it.

Total amount of energy captured by plants through photosynthesis. It's like the total income a farmer earns from his crops, regardless of expenses.

Energy remaining in plants after accounting for energy lost through respiration. It's like the farmer's profit after deducting his expenses.

The amount of primary production available. This is like the amount of food available for animals, which limits how many animals can be raised.

The continuous movement and reuse of nutrients within an ecosystem. It's like a recycling program where materials are constantly reused.

The conversion of atmospheric nitrogen gas into usable forms by certain bacteria. It's like taking apart a car to use its parts to build a new one.

The movement of phosphorus through the Earth's ecosystems, primarily involving rocks and living organisms. It's like a train circulating on a closed track, always moving but within a defined area.