Keystone species - Wikipedia

The concept of the keystone species was introduced in 1969 by the zoologist Robert T. Paine. Paine developed the concept to explain his observations and experiments on the relationships between marine invertebrates of the intertidal zone (between the high and low tide lines), including starfish and mussels.
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Keystone species - Wikipedia

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Earthwatch Non Profit Environmental Organisation Earthwatch combines volunteer opportunities for individuals from all walks of life with scientific research expeditions to conserve wildlife and the environment.

Keystone species - Wikipedia

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ActionBioscience - promoting bioscience literacy In general, both biologists argued that physical, geographic isolation must be a precursor to speciation. In this, the notion of “allopatric speciation,” environmental change might be imagined to separate previously continuous species distributions.

Keystone species - Wikipedia

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Energy and the Human Journey: Where We Have Been; The table below presents an abbreviated geologic time scale, with times and events germane to this essay. Please refer to a complete geologic time scale when this one seems inadequate.

Keystone species - Wikipedia

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ActionBioscience - promoting bioscience literacy When the Asian chestnut blight fungus virtually eliminated American chestnut from over 180 million acres of eastern United States forests in the first half of the 20th century, it was a disaster for many animals that were highly adapted to live in forests dominated by this tree species.

Keystone species - Wikipedia

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food chain - The Human Truth Foundation 1. The Sources of the Energies That Fuel the Cycle. 1.1. From the Thermal Origins of Life to Photosynthesis and Trophic Levels. Life started deep in the crust of the Earth, where the oxidation of sulphur was powered by the intense heat from below.

Keystone species - Wikipedia

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Species of Concern (SOC) Explanation - Montana Field Guide Species Status Codes. Provided below are definitions for species conservation status ranks, categories and other codes designated by MTNHP, Federal and State Agencies and non-governmental organizations.

Keystone species - Wikipedia

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Bat - Wikipedia Etymology. An older English name for bats is flittermouse, which matches their name in other Germanic languages (for example German Fledermaus and Swedish fladdermus), related to the fluttering of wings.

Keystone species - Wikipedia

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Pesticides US EPA This website provides easy access to all the pesticide-related information that is contained in various pesticide topical sites. It also includes news and meeting information, an A-Z index, and more.

Keystone species - Wikipedia

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Bioclimatic variables WorldClim - Global Climate Data Bioclimatic variables are derived from the monthly temperature and rainfall values in order to generate more biologically meaningful variables.