Explore BrainMass


Succsession in a Flooded Forest

I have somewhat of a understanding of this scenario. However, I am looking for a second opinion.I would like understanding the following: This story begins about 7,000 years ago, with a small creek running through a forest. Beavers dam the creek to create a pond in which they can build a lodge. the beaver dam prevents the natur


Please help me understand at least two ways the use of bioremediation can benefit society and two ways that it could be harmful.

Discussing Vertical Zonation

What are some possible explanations for the patterns of vertical zonation seen in rocky intertidal habitats? Please include some of the adaptations important to a successful intertidal species. What roles do keystone species play?

Biology study questions are posed.

Question 1 Choose the correct type of ecosystem for the following descriptions. Mediterranean climate, usually on the west coast of a land mass tundra taiga grassland chaparral savanna Question 2 text An arithmetic growth curve will have a steeper upward slope than an exponential growth cu

Identify and explain invasive aquatic species.

Identify one invasive aquatic species and describe how it was (most probably) introduced into the U.S. Outline how future introduction of this invasive aquatic species might be avoided or prevented.

Preserving animal species

Critically endangered animals, such as the Przewalski's horse, the vaquita, and the kakapo, have become extinct in the wild, or are soon to be doomed. As a member of the species that has wrought havoc on the habitat and subsistence of these creatures, what more could you think of doing to help preserve them? Along the same l

Population Dynamics in Louisiana

Louisiana has a population of 4,469,000 and a birth rate of 17/1000 population. The death rate is 8.8/1000 people. In the average year, 2.3/1000 leave the state. What is the annual growth rate in percentages? How many people are added each year?

Predator and Prey Relationships

Choose two non-human species that interact with each other, such as bees and flowers, or predator and prey species, or two species that compete. What would happen to predator species if a particular prey species is eliminated? If you were a scientist, you could do an experiment to answer your question. Please see an attac

Food Web

Create a food web diagram in which you illustrate the energy flow among the organisms of a food chain within a particular ecosystem. First, select one ecosystem from the following: Everglades, temperate forest, desert biome. Then, determine the interdependency of life in your selected ecosystem by examining the organisms fou

The role of humans in conservation - various opinions

Please help with the following questions: o What role, if any, do you think people should play in preserving those regions threatened by human encroachment? o How should the interests of competing groups be balanced? · Example: Drilling in the Arctic?environmental groups oppose the plan on the grounds of the destruction

Nitrogen Cycling for Forest Ecosystem

Assume that nitrogen cycling in a deciduous forest ecosystem is complete and involves all the producers, consumers and nitrogen fixing, denitrifying and ammonifying bacteria described in lecture a. Trace an atom of N (N15) that was released into the atmosphere of the forest through its route to a bacterial cell that releases

Self Contained Space Stations

If we designed a self contained space station and supplied it with organisms to create an ecosystem to support 6 people for 3 years, what types of organisms should be selected and why? Describe the main functions the organisms would perform.

UNESCO Research Outline

? Review Developing an Outline at Follow the instructions when developing your outline. ? Approach this project from the perspective of someone searching for funding to support preservation programs. ? Develop an outline identifying the ecological uniqueness of y

Biodiversity and Gull Effects

Maintaining biodiversity and gull effects. Of the following situation, examine the control methods used and its outcome. Consider the impact of the large gull population on the environment, other species, and humans. Then consider the impact of the control measures. Discuss the ethical issues involved in the decision to contol a

UNESCO Research

Approach from the perspective of someone searching for funding to support preservation programs. Review the ecological properties. Choose a property you would be interested in supporting. Cultural, archeological,or architectural are NOT to be used. Hope someone can help!

A hawk and fish example is named.

When a hawk eats a fish, does the hawk acquire all of the energy contained in the body of the fish? Why or why not? What implications do you think this answer would have for the relative abundance (by weight) of predators and their prey? I use the second law of thermodynamics to help justify.

Genetic Isolation

Using the scientific method as a framework, how would YOU as a scientist describe how a new species could arise by genetic isolation? Mechanisms of Speciation, What would be your observation, question, hypothesis, prediction, the experiment and finally the results using your own expertise. BELOW is an answer I received before-b

Change in Stream Hydrograph Over Time

See attached file for full problem description. (1) Describe the change in stream hydrograph over time. (2) What might have caused the change you described? (3) What are two possible effects on either biological or chemical parameters that might be expected to result from this change in hydrology?

Change in Water Level of Lake

(1) Describe the change in water level over time. (2) What might have caused the change you described? (3) What are two possible effects on either biological or chemical parameters that might be expected to result from this change in hydrology? See attached file for full problem description.


In an ecosystem, interaction occurs between communities. Energy is transferred from one organism to another through the food chain. What are the three trophic levels? Give an example of each. What trophic level do you think is the most important in the ecosystem and why? What is biodiversity? Is it important? Relat

Biomes and the Organisms That Live Within Them

Choose one of the earth's major biomes. and in powerpoint create a very simple presentation, each slide containing 1-2 sentences. Describe the climate and physical characteristics of that biome and the types of organisms that live within it. Give examples of and describe symbiotic relationships between those organisms. Be

Discussing Ecological Concepts and Environmental Adaptations

(1) What is the difference between these terms: Ecotype and Polymorphism Cline and Ecological Isolates Homeothermy and Endothermy (2) Describe a specific example of an adaptation that helps an organism solve one specific environmental problem but makes a different environmental problem worse. (3) What are the two requirements