Thursday, March 10, 2011

What are two ways a population can grow even if the birth rate declines?


Population growth refers to change in the size of a population—which can be either positive or negative—over time, depending on the balance of births and deaths. If there are many deaths, the world's population will grow very slowly or can even decline. Population growth is measured in both absolute and relative terms. Absolute growth is the difference in numbers between a population over time; for example, in 1950 the world's population was 4 billion, and in 2000 it was 6 billion, a growth of 2 billion. Relative growth is usually expressed as a rate or a percentage; for example, in 2000 the rate of global population growth was 1.4 percent (or 14 per 1,000). For every 1,000 people in the world, 14 more are being added per year.


Tuesday, March 1, 2011

Habitat destruction has been linked to the loss of many species. Which of the biomes or ecosystems do you feel is most fragile and endanger? Why?


One of the most endangered ecosystems on the planet continues to vanish at record rates due to lack of protection. Native prairie losses continue to mount as grain prices and demands for biofuels make the expensive conversion to cropland profitable, despite the costs to waterfowl, wildlife, and the American taxpayer.

Thursday, February 24, 2011

Describe the common parts of a river (riparian) habitat


Rivers have been used as a source of water, for obtaining food, for transport, as a defensive measure, as a source of hydropwer to drive machinery, for bathing, and as a means of disposing of waste.Rivers have been used for navigation for thousands of years.The ecosystem of rivers is generally described by the river continuum concept, which has some additions and refinements to allow for spatial (dams, waterfalls) and temporal (extensive flooding). The basic idea is that the river can be described as a system that is continuously changing along its length in the physical parameters, the availability of food particles and the composition of the ecosystem.

Blog # 2 Which biome would you most like to visit? Why?


Some problems in the fresh water biome are pollution (caused by humans), bacteria (medical problems) and over fishing. Some examples of pollution can be industrial waste, oil leakage or just plain littering. So would like to visit the biome water pollution problem to see if i can help the community out by getting it cleaner

Thursday, February 3, 2011

Describe some of the relationships between organisms you believe are happening on campus. Give at least three examples


Gio,Danielle,Pricilla,Justine-Well all living animals effect our Enviroment a few are : Birds, ants, and even some plants
Such as Weeds. The animal has the greatest impact since agriculture represents a way of organizing the environment to produce food, and this includes crops and livestock animals.
The animal effects the plants because it would use the flower as its meal.

Thursday, December 16, 2010

(blog #10) polly flower.


Some flowers become quite large, and so you must space them some distance apart in your flower bed. Others don't mind being crowded, and can be planted very closely. Flowers also differ in the amount of sunlight they prefer.When you've chosen an appropriate spot for your flowers and have prepared the soil, dig a hole that is 5-6 inches from flat ground. You also cannot over water the plant. Always make sure they get enough water and sunlight.

Thursday, December 9, 2010

Should we spend the money we do on water treatment?


In the financial year 2009/10 WaterAid’s total income was 45.6 million. This is actually good, you do not want want dirty water. For example when washing your hand, in the shower, or just drinking tap water. If we don't spend enough money for water treatment most of us would be sick, and always dirty.