Please choose the best answer.
What is used to Calculate the biodiversity of an area?
A. Total number of species
B. Total amount of living matter.
C. Total number of endangered species.
D. Maximum number of organisms that can be supported
Which one is it? Need some help here!!!!
2006-08-09 16:50:00 · 5 answers · asked by thunderbomb90 3 in Environment
I'm guessing total number of species. Is this right?
2006-08-09 16:56:19 · update #1
The value of biodiversity resources that are exploited as goods is considerable and usually unappreciated. A comprehensive study of the economic value of T&T’s biodiversity has never been done. The Environmental Management Authority (EMA) is planning to undertake such a study in the near future. Nevertheless, some data is available to hint at how considerable these figures would be.
Management of these exploited species is absolutely essential if we are to stem the destructive and uncontrolled over-exploitation that is currently taking place. Some key principles can be elucidated.
(1) Data needs to be collected on the catch being harvested and on the biology, ecology and population sizes of the species concerned. This is used to calculate a sustained yield that can be taken each season.
(2) Controls need to be put in place to limit the degree of hunting. This may be through the institution of permit systems, bag limits, catch restrictions, etc. The catch must be limited to the maximum sustained yield.
(3) Harvesting must not damage the reproductive potential of the population, which would reduce population growth and reduce the potential sustained yield. Young and pregnant individuals must not be taken. Limits on size, restrictions on pregnant animals, and a closed season during the reproductive months must be used.
(4) There must be strict monitoring and enforcement so that there is no illegal harvesting and legal harvesting is within the controls established.
(5) Protection of the habitats of exploited species is an integral component of any management plan. Wetlands (as nurseries for marine species) and coastal areas are critical habitats for many marine fish. Management of large areas of good quality forest is necessary for protection of game and other forest species.
(6) Harvesting methods used must specifically target the species desired. Methods that capture “undesired species” that are then lost are destructive to the ecosystem. Drift fisheries and trawling are examples of methods that have a large “incidental catch” of species (for example turtles).
2006-08-09 18:33:11 · answer #1 · answered by fzaa3's lover 4 · 1⤊ 0⤋
The correct answer is A.
Scientists use a formula called the biodiversity index to describe the amount of species diversity in a given area. A simple biodiversity index is calculated as follows:
the number of species in the area (numerator)
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the total number of individuals in the area (denominator )
= biodiversity index
For example, a 4 X 4 meter square area in a carrot patch has 300 carrot plants, all the same species. It has a very low biodiversity index of 1/300, or 0.003.
A 4 X 4 meter square area in the forest has 1 pine tree, 1 fern, 1 conifer tree, 1 moss, and 1 lichen, for a total of 5 different species and 5 individuals. The biodiversity index here is high, 5/5 = 1.
2006-08-09 16:57:23 · answer #2 · answered by mistress_piper 5 · 1⤊ 0⤋
A. Total number of species
2006-08-09 16:53:49 · answer #3 · answered by looloo 3 · 0⤊ 0⤋
The answer is A. Total number of species
2006-08-09 20:08:00 · answer #4 · answered by Lutfor 3 · 0⤊ 0⤋
d
2006-08-09 16:55:53 · answer #5 · answered by LARCO 4 · 0⤊ 0⤋