Non native species are organisms that do not naturally occur in a given area. They may have been transferred either accidentally or deliberately from their place of origin to the new area through human activities.
Non native species may become invasive species if they cause harm to the economy, human health, or environment.
Control methods used to eliminate invasive species are: 1) mechanical - physically removing the invasive species or changing the habitat condition of the affected area. 2) chemical - using of pesticides, fungicides, or herbicides to kill off invasive species. 3) legislative - introducing the natural enemy of the invasive species. It may be a predator or parasite that is from its native range.
The data collected for the purpose of scientific investigations from the ocean should be precise and accurate. The most precise data will be yielded by the temperature readings with a range of 2 degree Celsius. The chances of error in this data will be minimum as compared to the other data whose range is higher. Hence, the set of data with the temperature will yield precise results.
I'm assuming it would be Population Density. My class never covered this subject greatly, but the definition is "Population density is a measurement of population per unit area or unit volume;" which sounds like what you are looking for.
