Seagrass back in Dutch Wadden Sea

This video is called Eelgrass (Zostera marina) underwater in Ireland.

Common eelgrass is a seagrass species. Till about 80 years ago, it was common in the Dutch Wadden Sea.

Then, it became extinct there, after a big dike separated the Ijsselmeer fresh water from the salt water Wadden Sea, and after a seagrass disease epidemic.

Now, the Dutch Wadden Sea Society reports that an attempt to bring the eelgrass back to the Dutch Wadden Sea has started successfully. Last year, volunteers collected 100,000 seagrass plants near the German island Sylt.

They brought them to the Dutch Wadden Sea. It turns out that the plants are doing well.

More common eelgrass will be brought in from Germany.

Common eelgrass is important for fish laying eggs, and for young fish to hide. It makes a good environment for seahorses and pipefishes.

It also makes good food for brent geese.

Per unit area, seagrass meadows can store up to twice as much carbon as the world’s temperate and tropical forests: here.

Tasmanian swift parrot endangered

This video from Australia is called The Swift Parrot – Lathamus Discolor.

From Emu, a journal of BirdLife Australia:

Nesting requirements of the endangered Swift Parrot (Lathamus discolor)

30 May 2012

Abstract

Declines in avian biodiversity are being reported worldwide. A better understanding of the ecology of many species is fundamental to identifying and addressing threatening processes and developing effective mitigation measures.

The Swift Parrot (Lathamus discolor) is listed as endangered and is an obligate migrant that breeds only in Tasmania, wintering in mainland Australia. The species nests in tree-hollows and forages primarily on flowers of the Tasmanian Blue Gum (Eucalyptus globulus) and Black Gum (Eucalyptus ovata) during the breeding season.

Surveys for Swift Parrot nests conducted over three consecutive breeding seasons identified 130 Swift Parrot nests in 117 trees. Sites were between 12 and 130 ha in area with up to 49 nests found at an individual site.

Swift Parrot nest-trees were characterised as being large eucalypts (mean diameter at breast height = 105 cm) with five or more potential hollows (mean = 8.6) and showing clear signs of senescence. Reuse of nests was uncommon over the 3 years and the infrequency of reuse was most likely related to poor flowering of Tasmanian Blue Gums around nesting sites in years following recorded nesting.

To protect the species, conservation actions need to account for the spatiotemporal variation in the availability of Swift Parrot breeding habitat and recognise there may be several years between the use of a particular site. Given the number of nests found at individual sites this will require the management or reservation of suitable forest stands with old-growth characteristics across the landscape, rather than focussing on individual trees or historical nesting sites.

Baby shelducks, cygnets and hare

Yesterday, again to the “Baillon’s crakes’ reserve”.

Near the southern entrance, a reed warbler sings.

A female tufted duck swims.

A reed bunting song.

In the southern lake: shoveler ducks. Egyptian geese. A Canada goose nesting. An oystercatcher. A northern lapwing drives away a magpie.

A little ringed plover.

A common tern. Two black-tailed godwits wading.

A spoonbill lands in the northern lake.

Redshank and greenfinch sounds.

Four swifts fly past.

The water lilies have started flowering.

Domestic duck resting, 27 May 2012

A domestic duck escapee resting on the dike near the north-south bridge.

Mute swan with cygnets, 27 May 2012

A mute swan swimming in the north-south canal, with six cygnets.

Redshanks on northern lake mudflats.

Two barnacle geese. A black swan swimming.

Shelduck with ducklings, 27 May 2012

Near the railway, two adult shelducks. Like the last time when I was here, with seven ducklings. They swim past a grey heron on the bank. So, not one little one caught since last time (by a cat, a pike, or a grey heron).

Shelduck swimming with ducklings, 27 May 2012

A sedge warbler sings behind the shelduck family, in the reedbeds.

Sedge warbler singing, 27 May 2012

Great crested grebes and coots swim here with youngsters as well.

Coot, with chick, 27 May 2012

A hare in the same spot as last time, probably the same individual.

Hare, 27 May 2012

A group of five ring-necked parakeets flies overhead, calling.

Two goldfinches singing in a treetop.

Endangered Panamian sloths, new research

This video is called Pygmy three-toed sloth swimming HD.

From Wildlife Extra:

First population census of Critically Endangered pygmy three-toed sloth

In search of the pygmy sloth

May 2012. A group of tiny sloths living on an uninhabited island will finally counted, after a team from the Zoological Society of London (ZSL) conducted the first ever population census of the pygmy three-toed sloth (Bradypus pygmaeus).

Only found on 1 small island

The team undertook a nine-day expedition to Escudo Island, 17km off the coast of Panama, which is the only place in the world where the sloths are found. There, they conducted the first detailed population and habitat survey of the area, and spent time monitoring the unique behaviours of the world’s slowest mammal.

16th most endangered mammal

At half the size of their mainland cousins, and weighing roughly the same as a newborn baby, pygmy sloths are the smallest and slowest sloths in the world. They are ranked at number 16 on the EDGE of Existence mammals list and remain critically endangered.

ZSL’s David Curnick says: “Very little is known about this species. Current population estimates are, at a best guess, less than 500, but this is only based on anecdotal evidence. We’ve collected data for the first time to get an accurate picture of how many pygmy sloths are left in the world.”

More endemic species

Escudo is an unpopulated island fringed by mangrove forests, and roughly the size of New York’s Central Park. As well as sloths, it is known to be home to several other endemic species, including the neotropical fruit bat (Artibeus incomitatus) and the maritime worm salamander (Oedipina maritime), but very little is known about its wildlife, and the island remains largely unexplored.

As well as using bromeliad leaves as an umbrella to protect themselves from extreme weather, pygmy sloths appear to use mangrove trees as a tool to regulate their body temperatures – on cooler days they climb to higher spots to catch the sun, and when they get too hot they head down again to find a shadier spot.

Maybe fewer than 100 left alive

The team’s current data suggests that there could be fewer than 100 pygmy sloths left, making them one of the most endangered mammals in the world. The exact reasons for this decline are not yet known, but they found several areas where their critical mangrove habitats have been cut down.

Dr. Craig Turner from ZSL added: “The mangrove forests are relatively hard to penetrate, and from a sloth’s perspective they provide protection from aerial predators. We noticed that pygmy sloth mothers carrying young would remain low in trees, which may be an evolutionary hangover for predator evasion. However, hunting, mangrove cutting and tourism are all listed as threats to these sloths and their behaviour may now be putting them at higher risk.”

Conservationists from ZSL are currently analysing their data, and aim to publish the findings in the next few months. The team hopes to appoint and train an in-country EDGE fellow later in the year, and they will continue their monitoring and work within the local communities to establish the main threats to the species and develop plans to protect them.

Pygmy Three-Toed Sloth

The pygmy three-toed sloth was only recognised as a distinct species in 2001. It can only be found on Isla Escudo de Veraguas, which has been separated from mainland Panama for 9,000 years. Famous for its slow movements the pygmy three-toed sloth is ideally suited to life in the mangroves and is surprisingly good at swimming. The major threat to the pygmy three-toed sloth is habitat destruction which is reducing the size of its already small habitat.

New Australian plant species discovered

This video says about itself:

The Kimberley region is being described as Australia’s last great botanical frontier, after some significant new discoveries.

From Australian Geographic:

Botanist brothers uncover new Kimberley species

By: Victoria Laurie

May-17-2012

Intrepid botanist brothers Matt and Russell Barrett fly into our most remote regions to find new plant species.

A HELICOPTER HOVERS over the edge of a steep sandstone cliff deep in the wilderness of Western Australia‘s Kimberley region. Brothers and botanists Matt and Russell Barrett peer down at a rocky plateau. Before they even land, an unfamiliar shrub is spotted, and when they are finished, hours later, the helicopter is packed with many plant specimens carefully pressed between sheets of cardboard.

On one trip alone, they collected 10 new species over just six days, including undescribed types of Acacia, Melaleuca, Hibbertia, Eucalyptus, Boronia and Solanum, or bush tomato. “There are not many places in the world where finding this many new species is possible,” Matt says.

All specimens are carefully studied, labelled, named and preserved at the WA Herbarium or propagated at Kings Park’s Biodiversity Conservation Centre, the Perth-based institutions where the brothers work.

These botanists have endured tropical storms and swollen rivers in their quest to find new species in this vast and remote region, almost twice the size of Victoria. Luckily, they are hardy and can endure 18-hour work days, even in the sauna-hot humidity of the Wet. Growing up on Beverley Springs station, near the rugged King Leopold Ranges, the boys found their first new plant species – a triggerplant – growing beside a creek.

“Remarkable” contribution to Kimberley plant knowledge

Today, with several university degrees between them, Matt, 36, and Russell, 33, have added more to the knowledge of flora in the region than any other botanists in recent history. “Their contribution is remarkable and they are showing that the Kimberley is the last great botanical frontier in Australia,” says Kingsley Dixon, science director of Kings Park and Botanic Garden.

Matt and Russell have carved out a reputation for skilled observation and dogged persistence – they have clambered down cliffs near Kununurra, in the east Kimberley, in pursuit of a new species of Triodia, a spinifex that grows on rock faces. They’ve found themselves wading across croc-infested creeks, plant-specimen bags held high above their heads.

“We often go out in a helicopter and land on a spot where you can be almost 100 per cent certain that no white person has set foot before,” Matt says. “You’re seeing the place from a European perspective for the first time.”

Discovery can be a haphazard affair; on one occasion, while the brothers picked their way over stony ground, a giant yellow hibiscus loomed up in the landscape. From a distance, Matt thought it must be a weed. It turned out to be an unknown species, one of four Kimberley hibiscuses thriving in that rocky terrain that, so far, have been found nowhere else.

They have even rediscovered species that were suspected to be extinct. “One of them, Auranticarpa – similar to Pittosporum – was collected by Allan Cunningham on the [Phillip Parker] King expedition in 1821, then not seen for 180 years until we refound it in 2001,” says Matt. But it took the Barretts another 10 years to find an Auranticarpa in flower, the first such flower ever collected.

Plant-lovers from way back

The Barrett family moved to the Kimberley in 1981. Their father farmed; their mother supervised the kids’ School of the Air lessons. On holiday trips to Perth, they would bring plastic bags full of mouldering plants for identification – until a botanist took them under his wing and taught them how to press and preserve specimens properly.

There’s no sibling rivalry, Russell says. “I’d say it’s friendly competition – we each have groups of plants that we focus on, and we balance each other out quite well.”

“We play devil’s advocate,” adds Matt. “If one of us thinks we’ve found a new species, the other will challenge it. Russell is much more observant about spotting new plants. He’s intuitive; I’m more analytical.”

Russell says he is surprised that even fellow botanists fail to appreciate the diversity of Kimberley flora. “I’ve spoken to biologists who think of the Kimberley as a desert. If you drive along the Gibb River Road in the middle of the Dry, perhaps you would think that. All you’d see is rocks and dry grasses and trees…But if you live there through the Wet, within a couple of weeks after breaking rains everything turns from orange and brown to green. Within a month you’ve got knee-high grass and water is pouring off the gorges.”

The region’s plants may harbour secrets that could shed light on Australia’s floral history. “One toothbrush grevillea was discovered 10 years ago in the Prince Regent River area that has its closest relative in south-eastern Australia,” Matt says. “As far as we can tell, it’s a species left over after these plants went extinct over the rest of Australia. And it’s hanging on now in the Kimberley. To me that’s fascinating.”

Birds, insects in the botanical garden

This video from Britain says about itself:

Make your own Bug Hotel with the Horniman Museum

In the summer of 2009, the Horniman Museum and Gardens started work on a new Wildlife Garden which is now flourishing. It has been created as an outdoor classroom and an inspirational space containing lots of simple and fun ideas for attracting wildlife into green spaces. The minibeast hotel has proved the most popular feature and we have had lots of enquiries from people wanting to know how it was built.

We hope this video helps! The minibeast hotel is a one metre square structure made from old pallets and compost which we then packed with both living and non-living material to encourage bugs to visit for nectar, make their nests and spin their webs.

For more information about visiting the Wildlife Garden or taking part in any of our activities and events, visit our website http://www.horniman.ac.uk

On our way to the botanical garden today: in the canal, two young coots, fed by their parents. Close to where a coot nest was last year, in an old car tire.

Further in the canal, closer to the botanical garden. A beam floats in the water. On top of it, a big red-eared slider turtle. On the same beam, a smaller, younger turtle. Was it born here? Or is the climate too unlike the southern USA for that here?

Also on the beam, an adult coot drying its feathers. A young coot climbs on the beam as well. If the young coot approaches, sometimes the young turtle withdraws its head inside its shield. Soon, its head gets out again.

In the botanical garden since last year, a lot has changed. Now that the surroundings of the astronomical observatory, which had separated in the nineteenth century, are again part of the garden, several small biotopes for threatened Red List plants are around the observatory.

One of them is for plants, adapted to zinc in the earth. Zinc is poison for many plants, but not for plants adapted to it. One of them is the zinc violet; which flowers here.

There are also many new nest boxes in the garden. A big one for tawny owls. Others for great spotted woodpeckers (which I saw today). And for great tits, blue tits, nuthatches, short-toed treecreepers, spotted flycatchers, robins, wrens.

There are also boxes for bats, and one for hedgehogs.

Finally, there are many small boxes for solitary bees. A bigger one, called “insect hotel”. And a box for butterflies.

In the garden pond today: carp, which are supposed to be there. And roach; not supposed to be there, but which keep coming back, because roach eggs get attached to ducks’ feet etc.

World Migratory Bird Day in Kenya

This video is called Birds feeding at the Mount Kenya Safari Club.

From BirdLife:

BirdLife Africa Partnership Secretariat joins Mount Kenya Site Support Group to celebrate World Migratory Bird Day (WBMD) marked on 12th to 13th of May, 2012.

Thursday, May 17, 2012

Each year around the world, people come together to celebrate World Migratory Bird Day to raise awareness on the protection of migratory birds. This year’s 2012 theme for World Migratory Bird Day is “Migratory birds and people- together through time”. Migratory birds and people are inseparably connected in many different ways but human activities like excessive land use, unsustainable hunting, poor agricultural practices, industrial pollution and many other activities now gravely threaten migratory birds around the world. WMBD strives towards preserving the cultural ties people have with migratory birds and the vital economic and environmental benefits they sustain.

WMBD is an important event in the BirdLife Africa Partnership Secretariat calendar of events and this year, staff led by Regional Director for Africa, Dr. Julius Arinaitwe, took time off their busy schedule to mark WMBD in Mount Kenya Forest, one of Kenya’s top water towers and an Important Bird Area (IBA). This event was hosted by the Mt Kenya community SSG. The SSG was represented by 3 groups; the Mt. Kenya biodiversity conservation group, Baguretti ecotourism club and Baguretti conservation youth club each with a membership of at least 60 people.

The events kicked off with Bird watching through the forest with team leaders leading four groups. Several bird species were sited among them the Cinnamon chested bee eater, Grey headed Bush-shrike, Grey Apalis, African Harrier Hawk, Speckled Mousebird, Variable sunbird, Purple Grenadier, Red eyed dove and many more. At least 30 species were sighted. Participants also took part in planting trees with various species being planted in the forest. At least 100 seedlings were planted. All this activities were aimed at the protection of the forest which is an important IBA.

Dinosaur-era insect pollination discovery

Reconstruction of Gymnospollisthrips with pollen attached to the body over an ovulate organ of a gingko. CREDIT: Enrique Peñalver, IGME

By Jeanna Bryner, LiveScience Managing Editor:

Dino-Era Insects Frozen in Time During Oldest Pollination

As dinosaurs loomed overhead, tiny female insects had just dusted themselves with pollen grains when they perished.

Tue May 15, 2012 10:11 AM ET

THE GIST

Amber preserved the earliest evidence of insect pollination.

The insects, called thrips, lived during the dinosaur age and had dusted themselves with pollen.

With massive dinosaurs towering above, tiny female insects called thrips had just dusted themselves with hundreds of pollen grains from a gingko tree more than 100 million years ago when they perished, only to be preserved in tree resin called amber.

The discovery, detailed this week in the journal Proceedings of the National Academy of Sciences, is the oldest known record of insect pollination.

(Pollination occurs when either the wind or an animal, mostly insects, deliver pollen from a plant’s male reproductive organ to the female parts either on the same plant or another one.)

During the lower Cretaceous Period when the newly discovered thrips lived, flowering plants would have just started to diversify, eventually replacing conifers as the dominant species, the researchers said.

“This is the oldest direct evidence for pollination, and the only one from the age of the dinosaurs,” study researcher Carmen Soriano said in a statement. “The co-evolution of flowering plants and insects, thanks to pollination, is a great evolutionary success story.”

Soriano and an international team of scientists studying the two pieces of amber, which were discovered in what is now northern Spain, say the specimens date back between 110 million and 105 million years ago. [Photos of the Ancient Pollinators]

They found six female thrips, also called thysanopterans, enclosed in the amber, with hundreds of pollen grains attached to their tiny bodies — the insects are just 2 millimeters long. The thrips, the researchers found, belong to a new genus now named Gymnopollisthrips, with two new species, G. minor and G. major.

After the amber pieces’ initial discovery, they were then kept in a collection of the Museo de Ciencias Naturales de Álava in Spain.

To get a closer look at the pollination event frozen in time, the team used synchrotron X-ray tomography at the European Synchrotron Radiation Facility (ESRF), focusing on the most representative of the amber-encapsulated thrips. In synchrotron X-ray tomography, charged particles are sent speeding through magnetic fields; these particles release high-energy light that can then pierce opaque materials to reveal three-dimensional, high-resolution images.

The images revealed various features of the pollen grains, together suggesting the grains came from a kind of cycad, or gingko, tree, the researchers said. Gingkos have separate male and female trees, with males producing small pollen cones and females bearing ovules at the ends of stalks that develop into seeds after pollination.

The researchers wondered what these pollen transporters would’ve gotten in return for their services so long ago. The benefit must have been the opportunity to pick up pollen food for the thrips’ larvae, said the researchers, adding that this benefit would have nudged the emergence of the ringed hairs specialized for pollen transport.

“Thrips might indeed turn out to be one of the first pollinator groups in geological history, long before evolution turned some of them into flower pollinators,” Soriano said.

See also here. And here.