Related topics: species

Research bias may leave some primates at risk

Recent primate research has had a heavy focus on a few charismatic species and nationally protected parks and forests, leaving some lesser known primates and their habitats at risk, according researchers at The University ...

Biodiversity highest on Indigenous-managed lands

More than one million plant and animal species worldwide are facing extinction, according to a recent United Nations report. Now, a new UBC-led study suggests that Indigenous-managed lands may play a critical role in helping ...

New frog species discovered

UCF student Veronica Urgiles has helped describe two new frog species discovered in Ecuador, and she named one of them after one of her professors.

The wild relatives of livestock and crops are disappearing

"Transformative change" is needed to prevent a million species going extinct, according to a new report on the world's biodiversity. Based on information gathered over three years from land, freshwater and marine ecosystems, ...

Towards a worldwide inventory of all plants

Declining biodiversity due to man-made habitat destruction and climate change means that information about plant diversity and its distribution across the planet is now crucial for biodiversity conservation. With the Global ...

Stabilizing nations' food production through crop diversity

With increasing demand for food from the planet's growing population and climate change threatening the stability of food systems across the world, University of Minnesota research examined how the diversity of crops at the ...

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Species diversity

Species diversity is an index that incorporates the number of species in an area and also their relative abundance. It is generally a much more useful value than species richness.

The most common index of species diversity is a family of equations called Simpson's Diversity Index[1].

Here is one such example

D = (n / N)2

Where n is the total number of organisms of a particular species and N is the total number of organisms of all species.D is the value of diversity. It can range between 0 and 1, whre 1 is the richest an Ecosystem can possibly be.

Humans have a huge effect on species diversity; the main reasons are: - Destruction, Modification, and/or Fragmentation of Habitat - Introduction of Exotic Species - Overharvest - Global Climate Change

This text uses material from Wikipedia, licensed under CC BY-SA