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Ecological Core Concept is Populations -- Density and distribution

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		A female silver studded blue butterfly (Plebejus argus) on a shrub in the Donana National Park of southern Spain. A female silver studded blue butterfly (Plebejus argus) on a shrub in the Donana National Park of southern Spain. P. argus has a mutualistic association with ants of the genus Lasius and uses the...	You must be logged in to access all resource information.	More Info

		A group of bluehead wrasse (Thalassoma bifasciatum) shoal above a reef at St. Croix, U.S. Virgin Islands. A group of bluehead wrasse (Thalassoma bifasciatum) shoal (group together) above a reef at St. Croix, U.S. Virgin Islands. Shoaling is a common anti-predator behavior for reef fishes such as the...	You must be logged in to access all resource information.	More Info

		An Assessment of Assemblage Nestedness in Habitat Fragments This experiment illustrates how ecological theory can help conserve native species in a fragmented landscape. It is germane to units on biogeography, human impacts on ecosystems, landscape...		More Info

		Drivers of Avian Local Species Richness: Continental-Scale Gradients, Regional LAndscape, or Local Land Cover? Students use data to test hypotheses on breeding bird species richness. Students will exercise critical thinking skills to interpret data sets and maps. They will then create graphic presentations...		More Info

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 01 of 22 A view of the Rocky Mountain Biological Laboratory, a high-altitude field research station at 9,500 feet in the Colorado Rocky Mountains. RMBL has supported field work since it was founded in 1928,...	You must be logged in to access all resource information.	More Info

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 02 of 22 An example of a late spring frost and snow event at the Rocky Mountain Biological Laboratory, at 9,500 feet in the Colorado Rocky Mountains. This photograph was taken on 13 June 2001, when the...	You must be logged in to access all resource information.	More Info

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 03 of 22 Date of winter snowpack melt during the past 36 years at Rocky Mountain Biological Laboratory. A trend toward earlier snowmelt was noted during the study period, though the correlation was not...	You must be logged in to access all resource information.	More Info

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 04 of 22 A graphical representation of a frost event at the Rocky Mountain Biological Laboratory (Colorado). The temperature dipped to 25.1 F on 11 June 2004. Winter snowpack melted at the monitoring...	You must be logged in to access all resource information.	More Info

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 05 of 22 A flowering plant of Helianthella quinquenervis (aspen sunflower, Asteraceae) at the Rocky Mountain Biological Laboratory(RMBL). This species has flower buds that are frost-sensitive. The plants have...	You must be logged in to access all resource information.	More Info

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 06 of 22 Ants (Formica obscuripes) searching for extrafloral nectar on the involucral bracts around a flower head in bud in the frost-sensitive herb Helianthella quinquenervis. The ants help to deter...	You must be logged in to access all resource information.	More Info

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