Symbiotic Relationships
A relationship between two organisms in which one organism benefits and the other is unharmed...
Commensalism
What is an example of something biotic
Anything living
Lion,tree,grass etc.
Define species interactions
Two different species affecting each other
This sampling tool is a square frame commonly used to count plants.
Quadrats
Scientists find fewer macroinvertebrates in a creek with high levels of pollution. What can they say about ecosystem health?
It is poor/bad
A relationship between two organisms in which both organisms benefit.
Mutualism
What is an example of something abiotic
Any non-loving thing
Rocks, sun light, water
A snake eating a mouse is an example of this ecological interaction.
Predation.
This method is useful when investigating changes across an environmental gradient.
Transects
After habitat restoration, butterfly numbers increased from 15 to 35. What does this suggest about the restoration project?
Project improved habitat health
A small fish removes and eats parasites from a larger fish. Both species benefit from the interaction.
Mutualism
After a heatwave, many aquatic plants die. Identify the abiotic factor that most likely changed.
Temperature
The populations of two different predators that eat the same prey start to increase. Which negative selection pressure will increase because of this?
Competition.
This sampling technique is often used to estimate mobile animal populations.
Capture - recapture
In a wetland survey, water depth increases from 20 cm to 60 cm and the number of waterbirds rises from 5 to 18. Predict what might happen if water depth increased slightly further.
Number of waterbirds increase
Barnacles create home sites by attaching themselves to whales. This relationship neither harms nor benefits the whales.
commensalism
Can abiotic factors move on their own
yes because wind can move water or other abiotic factors
If a top predator disappears, populations of prey species would most likely do this.
Increase.
Scientists place quadrats randomly to reduce this problem in their data collection.
Sampling bias
A student records plant height every week for two months. The graph shows an upward trend. This suggests the plants are doing this.
Growing
A parasite depends entirely on one host species. The host becomes extinct. Predict what will happen to the parasite population.
Decrease alot or go extinct
In a drought year, water levels fall and competition between animals for drinking water increases. Which factor caused the problem for the animals?
The abiotic water availability
This type of species can dramatically reduce biodiversity when introduced into a new habitat.
Invasive species.
Scientists want to find out how mushrooms grow at different heights of a tree. What technique would they use?
Line transects
A graph shows that as tree canopy cover increases, ground temperature decreases. Describe the relationship.
Negative correlation