Density Dependent vs. Density Independent Factors

Jenay planted some flower seeds so she would have a nice yard. Over a few months the flowers grew in and filled the space she panted them in. With limited room to grow and grass taking up all the other available space, no more new flowers could grow in.

Justification

The local bay was a popular fishing and recreational spot. Unfortunately, some people started dumping their trash in the bay which caused some problems. The fish began getting sick and died from the polluted water. Soon, the plants started to die off as well. People stopped going to the bay because there weren’t any more fish and they didn’t want to get sick from the polluted water. The whole community was affected by the pollution.

Justification

The bee population in Brentwood, California enjoys warm conditions. One winter, unusually cold weather resulted in many of the bees dying off.

Justification

Fleas need a host to survive, so they bite dogs to get a meal. While the flea doesn’t hurt the dogs, a flea does not want the dog to die because then there would be no more meals. The survival of the flea population depends on the healthy dog population. The more dogs, the better conditions are for the fleas.

Justification

A massive hurricane hits the coastline of Texas. All the trees in the path of the hurricane are ripped out of the ground.

Justification

Charles wants to get some more fish for his tank. However, the expert at the store advised him not to get anymore unless he buys a bigger tank. Fish require enough space to move, breathe, and swim and if their numbers are too dense in a small space, they will suffer.

Justification

In earlier times, it was difficult to grow crops like oranges in places like England (cold and rainy). Now that the climate is getting warmer, farmers are having more success with these crops.

1. Jose is a wildlife photographer and wants to take pictures of Grizzly Bears in their natural habitat. Jose is having a difficult time getting good photos. The population of Grizzlies is down this year as a result of salmon populations being smaller.

Density Dependent or Density Independent?

Justification:

Jose is a wildlife photographer and wants to take pictures of Grizzly Bears in their natural habitat. Jose is having a difficult time getting good photos. The population of Grizzlies is down this year as a result of salmon populations being smaller.

Justification