Tulip tree new discoveries


This is a tulip tree video from the USA.

From the BBC:

16 April 2013 Last updated at 07:10 GMT

Tulip tree‘s genome is ‘molecular fossil’

By Mark Kinver, Environment reporter, BBC News

The “extraordinary level of conservation” of genetic data in the tulip tree remains largely unchanged since the dinosaurs, a study suggests.

The species’ genomic change is about 2,000 times slower than in humans, making it a “molecular fossil”, a team of US researchers said.

The new information has affected our understanding of flowering plants‘ evolution, they added.

The findings have been published in the open access journal BMC Biology.

The team from the universities of Indiana and Arkansas sequenced the mitochondrial genome of the species (Liriodendron tulipifera), only to discover it had one of the slowest silent mutation rates (a process that does not affect gene function).

They added that the sequencing showed that many of the genes that had been lost during 200 million years of flowering plants’ (angiosperms) evolution had been preserved.

“Based on this, it appears that the genome has been more-or-less frozen in time for millions and millions of years,” explained co-author Prof Jeffrey Palmer.

Prehistoric powerhouses

Mitochondria are found within organisms’ cells and their job is to generate power. They do this by converting food stuffs into chemical energy that the organism uses to function.

In an accompanying commentary, Prof Ian Small from the University of Western Australia – who was not involved in the research – said the vast variations between the genetic data of angiosperms gleaned from mitochondrial genome sequencing made “untangling their evolutionary histories difficult”.

However, he added, the paper by Prof Palmer et al turned out to be ” an extremely useful window into the past”.

Prof Small said the species was a member of an “early branching lineage” that was distinct from other groups that housed most of the world’s crop plants, which had been the target of most sequencing efforts around the globe.

As a result of the slow mutation rate, he explained: “This ‘fossilised’ genome gives us some important clues as to what mitochondrial looked like (and how they functioned) as flowering plants evolved and took over the land in the time of the dinosaurs.”

He added that the increasing cost-effectiveness of the sequencing process was making it easier to choose strategically informative species rather than focusing on economically important ones, ie food crops.

He explained that data gaps remained: “The coverage of early diverging plants is still from optimal, with many large and important groups still badly sampled – for example, gymnosperms and ferns.”

He concluded: “I look forward to being able to analyse the next molecular ‘fossil’ to roll off the sequencing machines.”

In detail: Tulip tree

Scientific name: Liriodendron tulipifera
Average height: 20m-30m
Native to the eastern US, and is considered to be one of the region’s tallest native trees
Generally flowers in mid-summer
Distinctive-shaped leaves, which are said to resemble dinosaur footprints
Popular parkland species, as its flowers look similar to tulips
Seeds are wind dispersed, often travelling up to seven times the distance of the mother tree
The timber has a reputation of being resistant to termites

Ospreys, how to help them


From the Cornell Lab of Ornithology in the USA:

NestWatch eNewsletter

March 2013

Osprey leaving the nest

An Osprey takes off from its nest platform. Photo by Dea via Birdshare.

Platform for Success

The Osprey is a large fish-eating hawk and a top consumer in the food chain. Like Bald Eagles, Ospreys declined following the widespread use of the pesticide DDT. Now that DDT has been banned in the United States for 40 years, the Osprey is a common sight in open habitats near water. Ospreys are good indicators of environmental toxins, and their recent rebound is a positive sign. Similar to eagles, the Osprey builds a conspicuous nest out of large sticks that is fairly easy to spot, if you know where to look. Ospreys seek out a high vantage point near water from which to build their bulky nest, usually atop a sturdy treetop or snag.

However, the Osprey will readily nest on an artificial structure, such as utility poles, boats, or even duck blinds, particularly when other options are limited. Because it can be undesirable to have an Osprey nest on one of these structures, many people encourage safer nesting by Ospreys by putting up an artificial nesting platform. Ospreys will readily use artificial platforms, and the following tips will help you to recruit a nesting pair of Ospreys to your area.

  1. Build community support for the Osprey by educating neighbors about this regal raptor. Talk to your local bird club, conservation organization, utility company, and/or parks department about providing in-kind or financial support for your project. Simply by asking, you may be able to secure donations of old utility poles, lumber, hardware supplies, or labor.
  2. Choose a location that is likely to attract Ospreys. The location for the platform should be within 1,600′ of water, and should be taller than any nearby trees (or at least 20′ tall, whichever is greater). If the platform is to be located in water, it should be at least 15′ over the water’s surface. Platforms can even be placed on utility poles with the aid of 6-8′ risers (work with your utility company to place platforms in areas where Ospreys are already using utility poles for nest sites). Ospreys are fairly tolerant of nearby human activity and of other Ospreys, so long as there is an adequate food supply to support nesting.
  3. Follow our construction plans for building the platform, and consider adding a predator guard to the post. Add a few large sticks to the bottom of the platform; this will entice Ospreys to check out your nest start.
  4. Monitor the platform for activity, and report your observations to NestWatch.org. You can also peek into the private lives of Ospreys by tuning in to the Lab of Ornithology’s Osprey Cam in May to watch nesting Ospreys in Montana, courtesy of Project Osprey.

Finally, share your success with us, and publicize it in your local newspaper! People will be curious about the platform, and this is the perfect chance to share the amazing Osprey with them. Coordinating a big project like this can bring together people from very disparate backgrounds–such as utility workers, anglers, and bird watchers–who might not otherwise work together for bird conservation. By taking on a project like this, you will not only be building a platform for success for the Osprey, but for future community partnerships, as well.

Author Mark Twain against war


This video from the USA is called THE WAR PRAYER – Mark Twain.

From Rick Rozoff’s blog in the USA:

Mark Twain: Man is the only animal that deals in that atrocity of atrocities, War

March 19, 2013

Anti-war essays, poems, short stories and literary excerpts

American writers on peace and against war

Mark Twain: Selections on war

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Mark Twain

From Man’s Place in the Animal World (1896)

Mark Twain

The higher animals engage in individual fights, but never in organized masses. Man is the only animal that deals in that atrocity of atrocities, War. He is the only one who gathers his brethren about him and goes forth in cold blood calm pulse to exterminate his kind. He is the only animal that for sordid wages will march out, as the Hessians did in our Revolution, and as the boyish Prince Napoleon did in the Zulu war, and help to slaughter strangers of his own species who have done him no harm and with whom he has no quarrel.

***

Man is the only Patriot. He sets himself apart in his own country, under his own flag, and sneers at the other nations, and keeps multitudinous uniformed assassins on hand at heavy expense to grab slices of other people’s countries, and them from grabbing slices of his. And in the intervals between campaigns he washes the blood off his hands and works for “the universal brotherhood of man” – with his mouth.