ECO HVAR: CILJEVI I AKTIVNOSTI DOBROTVORNE UDRUGE

Okoliš

Namjere udruge Eco Hvar za poticanje projekata zaštite okoliša i srodne teme

Više...

Zdravlje

Ideje udruge Eco Hvar za poticanje zdravog načina života i srodne teme

Više.

Životinje

Ideje udruge Eco Hvar za poticanje projekata zaštite životinja i srodne teme

Više...

Dragonflies, info request

Objavljeno u Vaša pisma

Can anyone help with information about dragonflies on Hvar?

Dragonfly Dragonfly Steve Jones

Steve from Dol has sent us the following query by email on 23rd September 2016:

'Do you know much about dragonflies on the Island?

Over the Summer I have seen several and I know Norman nearby has also seen similar.

While I know a few of the more obvious ones I am puzzled, one thing I do know is that they like water in which to lay. The dragonfly life cycle is for the most part spent underwater and they only emerge as what we see towards the end of their life and to mate.

I am puzzled as to where they can possibly lay eggs, I only know one source of water down near the airfield and I don’t believe from there they would travel up to Dol. I often think they could be laying in the numerous wells/water storage places in the field but most are covered and I don’t know how they would emerge. One species described to me was the Golden Ringed Dragonfly and this as I read likes fast flowing water so I even more at a loss.

I was down near the airfield yesterday and several of just two species that I could tell were flying the one species tended to be flying joined to his mate, there were several of these

Didn’t know whether or not you can shed any light on this for me? I know of someone in the UK who specialises in Dragonflies, I may email him and see what comes of it.'

Eco Hvar's reply, 23rd September 2016:

Yes, actually there are many more sources of water than you'd think, off the beaten tracks, but also in the fields.

One of Hvar's 'secret' pools. Photo Vivian Grisogono

A lot of the enclosed wells have open basin on top,which can be home to all sorts of insects, including water snakes. Unless the fields around the wells have been doused in herbicide of course. There was a superb little water snake in the open part of the well by my field one year. It would curl itself round and round very lazily, right up to the time the basin went dry. I was afraid 'my' snake had died, lying there quietly, but it then discreetly disappeared, re-appearing a cuple of times in the grass above the well, presumably looking forward to the winter rains which would replenish its basking place. 

Talking about herbicide, did you see that the sale of Cidokor/Roundup is to be banned from October 1st, together with 12 other glyphosate-based herbicides? Good as far as it goes, but it still leaves 12 other glyphosate herbicides on the market!

We''ll look forward to hearing the results of your dragonfly investigations. A good place to see them is in the environs of Humac, where there are some lovely natural pools where the horses and some hunting dogs drink and butterflies abound, as there are no poisoned fields in the vicinity.

Nalazite se ovdje: Home Vaša pisma Dragonflies, info request

Eco Environment News feeds

  • On a tiny Italian island, scientists conducted a radical experiment to see if the bees were causing their wild cousins to decline

    Off the coast of Tuscany is a tiny island in the shape of a crescent moon. An hour from mainland Italy, Giannutri has just two beaches for boats to dock. In summer, hundreds of tourists flock there, hiking to the red and white lighthouse on its southern tip before diving into the clear waters. In winter, its population dwindles to 10. The island’s rocky ridges are coated with thickets of rosemary and juniper, and in warmer months the air is sweetened by flowers and the gentle hum of bees.

    “Residents are people who like fishing, or being alone, or who have retired. Everyone has their story,” says Leonardo Dapporto, associate professor at the University of Florence.

    Giannutri island’s remote location made it a perfect open-air laboratory for the bee experiments. Photographs: Giuseppe Nucci

    Continue reading...

  • The people of Johnshaven have watched the sea edge closer and closer. Preserving the path is key to protecting their community

    • Photographs by Murdo MacLeod

    When Charis Duthie moved to Johnshaven with her husband in 1984, she could cycle along the coastal path out of the village. Now, she meets a dead end where the sea has snatched the land and is instead greeted with a big red warning sign of what is to come: Danger Coastal Erosion.

    “You can see gardens that were there and now they’re gone,” she says.

    Johnshaven, on Scotland’s North Sea coast, will attract more visitors if it has a well maintained coastal path

    Continue reading...

  • Increasingly erratic water cycle is creating food scarcity, rising prices, conflict and migration, says UN agency

    Only a third of the world’s river basins experienced normal conditions last year as the climate crisis drove extremes of drought and flood, sometimes both in the same region.

    The increasingly erratic water cycle is creating big problems for societies and governments and causing billions of dollars in damage, scientists warned.

    Continue reading...

  • St Dominic, Tamar Valley: So far in early autumn, an abundance of ash keys and plump acorns – and the apple and pear trees are heavily laden

    At last, Atlantic weather has set in, bringing much-needed rain to green the hard-grazed turf and fields of cut hay and silage. A few late swallows swoop between hedgerows along sky-reflecting Summers Lane, and dart beneath the gate of the adjoining pony-trodden field. Before the rain, a battalion of 50 swallows gathered on wires by Corneale farm, perhaps in anticipation of the journey home.

    After the unusually early harvest of cereals (completed by mid-August), the earth beneath the stubble is softened; maize puts on yet more growth and should provide lots of fodder when gathered next month. Livestock farms are self-sufficient in winter feed, but some straw for bedding has been bought from upcountry, costing up to £120 per tonne.

    Continue reading...

  • Researchers from Imperial College London say 16,500 deaths caused by hot weather brought on by greenhouse gases

    Human-made global heating caused two in every three heat deaths in Europe during this year’s scorching summer, an early analysis of mortality in 854 big cities has found.

    Epidemiologists and climate scientists attributed 16,500 out of 24,400 heat deaths from June to August to the extra hot weather brought on by greenhouse gases.

    Continue reading...

  • Since our 2024 climate pledge, there has been a global pushback against green progress. This update reflects the urgent and growing challenges facing our planet – and how the Guardian is more focused than ever on exposing the causes of the climate crisis

    • In the past three weeks, more than 50,000 Guardian readers have supported our annual environment support campaign. If you believe in the power of independent journalism, please consider joining them today

    The Guardian has long been at the forefront of agenda-setting climate journalism, and in a news cycle dominated by autocrats and war, we refuse to let the health of the planet slip out of sight.

    2024 was the hottest year on record, driving the annual global temperature above the internationally agreed 1.5C target for the first time

    Winter temperatures at the north polereached more than 20C above the 1991-2020 average in early 2025, crossing the threshold for ice to melt

    The planet’s remaining carbon budget to meet the international target of 1.5C has just two years left at the current rate of emissions

    Humans are driving biodiversity loss among all species across the planet, according to the largest syntheses of the human impacts on biodiversity ever conducted worldwide

    Tipping points – in the Amazon, Antarctic, coral reefs and more – could cause fundamental parts of the Earth’s system to change dramatically, irreversibly and with devastating effects. We asked the experts about the latest science – and how it makes them feel

    Published our annual company emissions data, explaining what drives our emissions and where they have risen and fallen

    Created a digital course, as part of an initiative by the Sustainable Journalism Partnership, sharing examples from experts across the Guardian of how to embed sustainability into journalism and media commercial operations

    Contributed our time and knowledge to working groups in the advertising industry that are working on better ways to measure the emissions impact of advertising

    Continue reading...

  • Accommodation costs at climate summit in Belem are pricing out some developing countries and media outlets

    The United Nations has urged its staff to limit attendance at the Cop30 climate summit in Brazil in November due to high accommodation prices, while government delegations are still scrambling to find rooms within their budgets.

    The move comes as delegations grow increasingly concerned about the cost of accommodation in the coastal Amazon city of Belem hosting Cop30. Brazil said it was working to increase the number of available hotel beds, but soaring prices for accommodation have stoked calls from some governments to relocate the conference, which Brazilian officials have rejected.

    Continue reading...

  • The warmest summer on record has brought a premature autumn – which could leave little food for overwintering birds

    According to the Met Office, autumn in the UK began on 1 September, yet in the hedgerows around my home there have been signs of the season’s arrival for many weeks now, after the warmest summer on record.

    Hawthorn trees, which usually produce their crimson berries from mid-September onwards, have been festooned since the second week of August; while blackthorns are drooping under the weight of huge, ripe, purple sloes.

    Continue reading...

  • DIY expert Jaharn Quinn has spent 20 years upcycling homewares. She shares where to look and what to bring when hunting for pre-loved pieces

    I have always loved thrifting and upcycling. There’s no greater feeling than discovering a hidden gem at a thrift shop and upcycling it into something new, especially when you save hundreds – sometimes thousands – of dollars.

    I love flipping through interior magazines, poring over gorgeous images on Pinterest and scrolling through home tours on social media.

    Compile your thrifting inventory. This should include the items you are especially looking for, such as a bedside table or a chest of drawers. It’s inevitable that you’ll get sidetracked – which is half the fun – but a list helps you focus when you start to feel overwhelmed, which sometimes happens.

    Always carry cash. It makes it easier to bargain.

    Pack plenty of blankets or towels in your car. These will protect the pieces you find and keep them cushioned from moving around in your vehicle too much.

    Pack a toolkit including antibacterial wipesto wipe down secondhand furniture, removing the dust and dirt to see what’s underneath; measuring tape to see what will fit in your car and home; a notebook filled with ideas, house plans and measurements plus a pencil to jot more down; paint swatches to check for colours that can easily be integrated into your home; and a screwdriver set in case you need to take furniture apart to fit it into your car.

    Continue reading...

  • Thousands of dodos could return within a decade according to Colossal Biosciences, a ‘de-extinction’ company – but experts warn of ‘moral hazard’

    Since its demise in the 17th century, the dodo has long been synonymous with extinction. But thousands of dodos could soon again populate Mauritius, the species’ former home, according to a “de-extinction” company that has announced a major breakthrough in its quest to resurrect the flightless bird.

    Colossal Biosciences said on Wednesday it has succeeded in growing pigeon primordial germ cells, precursor cells to sperm and eggs, for the first time. This is a “pivotal step” in bringing back the dodo, which was a type of pigeon, for the first time in more than 300 years, according to Colossal.

    Continue reading...

Novosti: Cybermed.hr

Novosti: Biologija.com

Izvor nije pronađen