July282014
oldsampeabody:

Virginia Ctenucha (Ctenucha virginica) at Bartholomew’s Cobble, Ashley Falls, MA

oldsampeabody:

Virginia Ctenucha (Ctenucha virginica) at Bartholomew’s Cobble, Ashley Falls, MA

July142014
"The ecological niche concept is very important in ecology. But what a niche looks like is fairly abstract. Now, for the first time, researchers have concretely visualized the ecological niche. The biologists have been able to determine the position of fourteen fish species in relationship to their food in a four-dimensional food diagram."


 (via Ecologists make first image of food niche — ScienceDaily)

"The ecological niche concept is very important in ecology. But what a niche looks like is fairly abstract. Now, for the first time, researchers have concretely visualized the ecological niche. The biologists have been able to determine the position of fourteen fish species in relationship to their food in a four-dimensional food diagram."


(via Ecologists make first image of food niche — ScienceDaily)

July132014
Pelagornis sandersi - largest airborne bird with a wingspan of over six meters; probably soared, but might not have been able to sustain flapping flight. 



(via Fossils reveal largest airborne bird | Science News)

Pelagornis sandersi - largest airborne bird with a wingspan of over six meters; probably soared, but might not have been able to sustain flapping flight.

(via Fossils reveal largest airborne bird | Science News)

July82014
mothernaturenetwork:

How United is helping track tiny speciesThe airline teamed up with the Smithsonian to equip its planes with radio receiver antennas that will gather data on difficult-to-track animals.

mothernaturenetwork:

How United is helping track tiny species
The airline teamed up with the Smithsonian to equip its planes with radio receiver antennas that will gather data on difficult-to-track animals.

3PM
migeo:

Banded Iron Formations (by Ale*)
The Banded Iron Formations (BIFs) are a series of stratigraphic rock units deposited at different times in different environments. They contain higher-than-usual amounts of iron (Fe). These deposits are all Precambrian in age, and the ones in the image in particular are Archean (older than 2.5 billion years ago, that is 2,500,000,000 years). The current explanation for the abundance of Fe in these layers, albeit not totally accepted by the scientific community, is that Fe existed in solution in Archean ocean waters in its reduced form. Sudden increase in the amount of available oxygen, caused by the beginning of photosynthetic life in the form of stromatolite-building cyanobacteria, would have caused the reduced Fe to oxidize to hematite (and possibly magnetite). There is evidence in the fossil and rock records of an increase in atmospheric oxygen right after the last deposited BIFs. BIFs were never to form again. At the very beginning, before any BIFs were ever deposited, the most common form of Fe on Earth’s surface was pyrite. Pyrite today would not stand a chance of preservation in subaerial environment because of the abundance of oxygen in the atmosphere.
Soudan, Minnesota

migeo:

Banded Iron Formations (by Ale*)

The Banded Iron Formations (BIFs) are a series of stratigraphic rock units deposited at different times in different environments. They contain higher-than-usual amounts of iron (Fe). These deposits are all Precambrian in age, and the ones in the image in particular are Archean (older than 2.5 billion years ago, that is 2,500,000,000 years). The current explanation for the abundance of Fe in these layers, albeit not totally accepted by the scientific community, is that Fe existed in solution in Archean ocean waters in its reduced form. Sudden increase in the amount of available oxygen, caused by the beginning of photosynthetic life in the form of stromatolite-building cyanobacteria, would have caused the reduced Fe to oxidize to hematite (and possibly magnetite). There is evidence in the fossil and rock records of an increase in atmospheric oxygen right after the last deposited BIFs. BIFs were never to form again. At the very beginning, before any BIFs were ever deposited, the most common form of Fe on Earth’s surface was pyrite. Pyrite today would not stand a chance of preservation in subaerial environment because of the abundance of oxygen in the atmosphere.

Soudan, Minnesota

June152014
dendroica:

These unusual formations on Spain’s western coastline adopt various shades of green throughout the year as different plants begin to blossom. Freshwater and salt water collide to make different shades of blue. The unusual scenery can be seen in Bahia de Cadiz Natural Park in Spain. Picture: Diego Lopez Alvarez/Solent News (via Pictures of the day: 4 June 2014 - Telegraph)

dendroica:

These unusual formations on Spain’s western coastline adopt various shades of green throughout the year as different plants begin to blossom. Freshwater and salt water collide to make different shades of blue. The unusual scenery can be seen in Bahia de Cadiz Natural Park in Spain. Picture: Diego Lopez Alvarez/Solent News (via Pictures of the day: 4 June 2014 - Telegraph)

12PM
buggirl:

Sometimes butterfly chrysalis will be metallic so it serves as camouflage near bodies of water.
Mindo, Ecuador

buggirl:

Sometimes butterfly chrysalis will be metallic so it serves as camouflage near bodies of water.

Mindo, Ecuador

12PM
June62014
May42014

zacharge:

Northern Rubber Boa (Charina bottae)- San Mateo County, CA

The rubber boa (Genus: Charina) is one of only two native boas (Family: Boidae) found in North America (the other being the Rosy Boa). These heavy bodied snakes are fossorial- that is, they are adapted to burrowing and living underground.

Rubber boas have a blunt tail tip that is used for defense. When threatened by a potential predator, the boa will coil into a ball and present its tail as a “false” head to deflect attack. Furthermore, as rubber boas tend to prey on nestling rodents, its tail is also used to preoccupy mother rodents as it feeds. Due to this, many rubber boas in the wild have heavily scarred tails.

(via rhamphotheca)

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