biodiversity

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biodiversity

(bī′ō-dĭ-vûr′sĭ-tē)
n.
1. The number and variety of species found within a specified geographic region.
2. The variability among living organisms on the earth, including the variability within and between species and within and between ecosystems.

biodiversity

The existence of complex flora and fauna in an ecosystem; the genetic diversity of natural organisms. Biodiversity increases the overall productivity of a plot of land, and maximises its resistance to disturbances—e.g., drought. In prairie ecosystems stressed by drought, recovery to a normal state of productivity was more rapid in experimental plots of vegetation with the greatest biodiversity, a finding that supports the need to maintain biodiversity.

Loss of biodiversity—i.e., a reduction in the number of species, subspecies and strains—will be disastrous for the planet's ecosystem. An example would be growing a crop food, e.g., corn or rice, from only one highly productive, rapid-growing, spoil-resistant strain—while seemingly having all the desirable features, if the strain became susceptible to a particular pathogen, all those dependent on the crop could face famine.

Marine biodiversity may be in a state of ecological crisis due to coastal development—e.g., destruction of estuaries, motorised marine vessels, ocean dumping, oil spills, overfishing with trawling of the ocean floor and subsequent disruption of bottom communities and coral reefs, overwhaling, pollutant runoffs, and toxic tides due to eutrophication.

biodiversity

see DIVERSITY.
References in periodicals archive ?
Depletion of Bio-diversity is the biggest ecological problem of India today: The extinction of species creates irreversible changes in nature e.g.
How can we sustainably use nitrogen to produce the food, fiber and energy for the Earth's seven billion people while minimizing degradation of air and water quality, bio-diversity and ecosystem services, is the critical question today," pointed out Dr Sybil P Seitzinger of International Geosphere -Biosphere Programme, Stockholm, Sweden, during one of the sessions.
The conference concludes on Thursday with adopting the projects of ''Tunisia's Call on Youth and Bio-diversity'' and ''Tunis Declaration''.M.
"It adds value to the many achievements made by the Kingdom of Bahrain and takes international implications by being opened in 2010, the year considered by the United Nations as the International Year of Bio-diversity, he said.
Native crops are also better for preserving the habitats of birds and other species, and maintaining bio-diversity is good for the long-term health of the ecosystem, according to the researchers.
The international community decided to set up seed bank, frequently known as gene banks, as a response to the loss of bio-diversity. There are now 1,300 banks containing around six million acquisitions.
Here bio-diversity and fun meet and inspiration and learning go hand in hand."
The new company will focus on landscape design and build processes committed to resource conservation, intelligent irrigation and bio-diversity.
And yet, despite being owned by Liverpool city council for 32 years and accepted as a site of nature conservation value, the gasworks still has no reserve status or any legal protection to safeguard this bio-diversity.
Also on the agenda of today's session will be the second reading of the drafts military service & retirement, Iraq's joining of the agreement on bio-diversity and the Islamic conference agreement to fight the international terrorism.
The value of bio-diversity to Ireland is valued in total at around EUR2.6billion, a report by the Environment department has revealed.