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Bill Sutherland's Conservation Concepts
เข้าร่วมเมื่อ 2 เม.ย. 2024
I am a conservation scientist determined to improve the planet. Each short video will explain an ecological concept and describe why it is important for conservation. My hope is to increase the understanding of the natural world and aid people who want to protect it. Hope you find these interesting and enjoyable and that you find ways of making a difference.
Ecological stability, cycles and chaos
A simple model in which populations increase but the growth is reduced at high levels (known as density dependence) produces a remarkable range of different outcomes. If the growth is slow it reaches a stable population, if faster it again reaches a stable population but might bounce up and down a bit first (damped oscilations), if faster still it may go repeatedly from low to high levels (cycles) and if faster still may show remarkable apparantly random pattern (chaos). Cycles are common in nature (lemmings, snowshoe hares, measles) especially in simple systems.
มุมมอง: 134
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Keystone species
มุมมอง 188วันที่ผ่านมา
Keystones are the often small wedge-shaped stones that stop arches from collapsing. Keystone species are those that have a disproportionate impact on the community.
Ecological catastrophes:
มุมมอง 29014 วันที่ผ่านมา
Catastrophes often have devestating humanitarian consequences but can also have ecological consequences. The landslip about 6200 BC, off south-west Norway, the Storegga Slide. This resulted in a huge wave, a tsunami, that was 30m high and travelled at 100 km an hour when it hit Shetland and 3-6 m high on the east coast of Scotland and Northumberland. Russ Lande showed how ecological catastrophe...
Exponential growth
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Exponential growth is a key concept in ecology but the term is often musused or misunderstood.
Food chains and food webs
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The first law of thermodynamics states that energy cannot be created or destroyed - it has to go somewhere. In food chains, each layer, it can decompose, it can be lost as heat as the organism does work, such as grows, or it can be eaten. Furthermore, each animal stage is generally larger and fiercier as need to quell their prey. The first law of thermodynamics and the need to be able to captur...
Regenerative agriculture
มุมมอง 1.7Kหลายเดือนก่อน
With increase concerns about managing for soils, water, nature and society, there is increasing interest in regenerative agriculture that restores the land. Marina O'Connell's Huxhams Cross Farm shows the power of this way of thinking.
Host-jumping pathogens: the amazing story of oak mildew
มุมมอง 460หลายเดือนก่อน
The dusty white coating on oak trees, oak powdery mildew has a remarkable history and may be reducing the capacity of seedling to regenerate and increase mortality of mature trees in droughts. Suprisingly oak powdery mildew Erysiphe alphitoides, is a relative newcomer. It first appeared on oaks in Europe early in the 20th century, spread rapidly and is now global. Remarkably, it host-jumped fro...
Shorebird roosts: importance and creation
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Many species roost communally, such as birds, monarch butterflies and bats. Shorebirds as an example are dependent on roosts, but these can be created.
The physics and ecology of tides
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As worked out by Issac Newton, the pattern of tides depend on the gravitational pull of the Moon and the Sun. The pull of gravity is proportional to the mass of the object divided by the distance away squared. So the Moon has more gravitational pull as, although smaller, is closer, and distance matters more. With the Moon and Sun in line they pull the water - so the water is oval shaped. Then a...
Saving plants through citizen science - The Breckland Floral Group
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Breckland in eastern England holds a range of plants that are rare in Britain. The Breckland Floral Group is a set of volunteers who carry out surveys to look at the status, reasaons for changes and response to actions. This video shows surverys for red-tipped cudweed Filago lutescens These studies show how some species are more abundant than previously thought but that others, such as sand cat...
Saving the world's rarest conifer
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This fir tree Abies beshanzuensis was only known from the pollen record until 1963 when a forester discovered seven growing in Baishanzu National Park at 1700 metres. There are now just two mature individuals left.
What makes some forests so diverse?
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With Fangliang He and Nathan Kraft discussing why there are 156 species of tree in the 25 hectares of this forest in China or 1100 species in a similar plot in the Amazon. Why is there such diversity? Although still subject of active research, there is good evidence for species differing in habitat both at a large scale and small scale, that the dynamics are important such as their response to ...
Chalk Streams: ecology and conservation
มุมมอง 3332 หลายเดือนก่อน
Four fifths of the world's chalk streams are in the UK. Chalk is pressed remains of marine plankton and such has considerable gaps to hold water. This ensure water flow is reasonably constant and the water temperature is consistent at about 15C. Acidic rain disolves the chalk resulting in high nutrient water. The chalk filters the water while runoff (with sediment and organic matter) is reduced...
Lusitanian flora and fauna
มุมมอง 1642 หลายเดือนก่อน
A perplexing group of species occur both in Iberia and South-west Ireland. In Ireland they were thought to perhaps have survived the last ice age in a refuge and then expanded. Recent research shows many of these a species were probably introduced by humans, sometimes in in prehistory. The strawberry tree (Arbutus unedo) is the most famous member of this group and seems to have been introduced ...
Forest dynamics plots: monitoring change
มุมมอง 1422 หลายเดือนก่อน
The first Forest dynamics plot was established in 1980 on Barro Colorado Island, Panama, by Stephen Hubbell and Robin Foster. The same design has been adopted around the world with every tree above 1cm diameter at breast height (1.3m), tagged, identified and measured. Here Fangliang He describes the 25 hectare plot at Baishanzu forest plot, China, in which they have monitored 207 thousand trees...
Managing archaelogical sites for conservation
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Managing archaelogical sites for conservation
Urban ecology: community conservation
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Urban ecology: community conservation
Bogs: origin, ecology and conservation
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Bogs: origin, ecology and conservation
Bird predation and vegetation structure
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Bird predation and vegetation structure
Hi Bill, I just wanted to say THANK YOU for making these amazing videos. I am studying my MSc in Biodiversity, Conservation and Nature Recovery and your channel was recommended by my programme leader. They are invaluable as a resource - I've spent the morning going back to the very beginning and watching them all. I'll recommend everyone on my course to watch them too. Thank you again!
@@GeorgieoftheJungle many thanks. Delighted you find them useful and really pleased it was recommended (sounds like a great course…). Doing Tragedy of the Commons next. Good luck with your MSc. Bill
very well explained it was easy to follow along!
Many thanks Tarek. Explaining physics in the dark was a challenge!
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Thanks. Got the example from Twitter - will credit later today. Hope you enjoyed the cyclist!
Very interesting, thanks! Fantastic example.
Interesting concept profoundly relevant at a time when the relative climatic stability of the Holocene is being catastrophically destabilised at an accerating rate such that what were once infrequent or rare catastrophic weather events appear now to be becoming alarmingly commonplace. I fear the resulting localised extinction effects from these will be greatly exacerbated when superimposed on what are already fragile, degraded and depauperate ecosystems from years of human over-expoitation and mis-management. Hate to be pessimistic but I can't help feeling that the future for wildlife and humanity looks extremely bleak indeed. I have learned the hard way that ecology is not the best profession for a depressive!
Thanks so much sir ❤
You are very welcome. Glad you found it useful.
Thank you for continuing this series! :)
Thanks. I enjoy doing them. Bill
Now if only there was an easy way to encourage exponential growth in the spread of valuable knowledge, so that enough people see and learn from this... #forTheAlgorithm
Indeed!
So what’s the outcome? Sounds like it needs some liaison with a local farmer to cultivate those rides in the autumn.
@@outoftownr3906 Absolutely! Forestry England were part of the survey and manage the land. I am sure they will deal with this.
The fens are prime grade 1 agricultural land unfortunately so a big no no to re wild apart from the Great Fen Project linking 3 National Nature Reserves with in fill rewilding. Surprised Cranes weren’t on the banquet list for Liz 😂
Its all common sense & something that’s showing green shoots in the agricultural world.
Impressed by info but would like a closer look at everything. Where are the workers, hen houses, pigs , cows etc? I understand what has been done but the investment must have been enormous. Does it now make a profit?
I was there in the morning before it was due to open so just two staff there. Was buzzing with workers and visitors when I visited before. The cows are in the field at the bottom of the valley, which I didn't visit. The hens are in moveable sheds. Not sure where the pigs are at the moment (I didn't visit all the farm this time). As I understand it, the farm does make profit. The ownership is complex and is explained in Marina O'Connell's book Regenerative agriculture, which gives masses of details and would answer many of your questions. naainaai.co.uk/products/designing-regenerative-food-systems?srsltid=AfmBOorQmib9Rizs08Kelab5XOIjpskUiXWWIR5fTqcAnVhVb2BKoAid Good luck.
Great video, always glad to see more content on Permaculture and Regenerative farming
This was planned using permaculture principles. Glad you enjoyed it.
Great to see what can be done.
Indeed - such an inspiration.
Fantastic video, great to see small farms taking a different approach to agriculture.
Thanks James. This is such a visionary site.
Really makes me think about what I am seeing all around me, and understand climbing plants' role in the landscape.
Thanks Jo, I find them fascinating and misunderstood. Almost all drawings of bindweed in books don't make sense and are impossible.
Very interesting, I have to look at the wisteria leaves when the sun is up. We have one growing next to a few quercus robur that are showing signs of that particular pathogen each year. Would be interesting if it can make the jump to the robinia pseudoacacia thats pretty invasive here and growing alongside the oak trees since its also related to peas, could help the other trees to be more competitive with it. Fascinating dynamics! P.S.: I just realized I currently have a small mango standing in half shade below the oak...
I don't think it has spread much yet on wisteria. Lets me know what you find.
@@Bill_Sutherlandah just thought about this again so here's the follow-up: I couldn't spot anything when I looked but it seemed like even the oak wasn't that bad anymore as in peak summer due to all the rainfalls. Maybe I can remember to look at it next summer when it's dry again and the oak leaves are just covered with it and give another update then :D
@@GamerdevilPro Thanks for the update. Interesting that the infection isn't too bad.
That's quite heartbreaking... :/ And yet, 99.99% of humans will probably never even know nor care about it. Thanks for the video!
Thanks. Is a tragic story.
I hadnt heard of this. I live now in Andalucia, Spain. Out local oak is quercus ilex. I shall be looking out for this now. As this tree is native here it might not be so badly affected although the last few winters we have had very little rain so all plants are stressed.
Thanks. I know it can get infected with powdery mildew. Let me know what you find. This tree is locally common in north Norfolk. The story is that a son of one of the Earls of Leicester, who own Holkham Hall, was a great collector of Italian art and Q. Ilex branches was used as packing for the sculptures and paintings sent home. Early polystyrene chips!
Beautiful! Thank you for these little lectures from the field. As an ecologist I much enjoy them.
@@Tereza-v2q Thanks Tereza, this one was an interesting challenge. Glad you enjoy them.
Nicely and simply explained. This lag in effects, often occurring over decades, is perhaps the main concept that people need to understand in plant conservation.
@@simonpierce9807 Thanks Simon, agree this is such a critical concept yet little appreciated.
Fascinating!
Thanks. Agree - such an interesting topic. Plan to return to it later this year.
Fascinating! We often think so little of our distant ancestors (the entire "primitive cavemen and wild tribes with little civilization" stereotype thing) that we often fail to see their accomplishments but also their effects on nature and our environments up to this day.
Are you sure this is tree of heaven and not black locust (Robinia pseudoacacia)?
@@gutemorcheln6134 thanks! Fear you are right. Saw masses of tree in heaven in north London. Might redo.
Such a useful, welcome account of how these pavements and their diverse plant communities formed, thank you! I really like your 2 minute format. Both short enough and long enough!
Thanks Ann, do find them such a striking, fascinating and enjoyable habitat.
The scientifically-proven uptick in temperature over the last 200 years is unprecedented over the geological record. Temperature changes have of course occurred, but they have done so over 1,000s and tens of thousands of years, due to volcanic activity, the Earth’s 50,000 year wobble or perturbation of its axis, and other astronomical factors, all of which cause the regular Ice Ages, of which we are in an “inter-glacial” period. Does Mr Duffin have any scientific qualifications or is it all conjecture and huff from his armchair?
Very interesting Bill. Thank you!
Thanks Russ, these thermometers are a real eye-opener.
Very interesting
Glad you think so! Many thanks.
Also some of those tropical forests have been relatively stable for millions of years allowing organisms to diversify into ever more specialized niches, where as more northern forests were scoured from much of the landscape by glaciation during the ice ages so the ecosystems we see today in places like the UK are only about 10000 years old.
Fully agree Rod. Was thinking of another video on the impact of ice ages making your point. There is still the question whether there are 1100 niches in 25ha of Amazon forest - it seems that we need to include other explanations as well.
@@Bill_Sutherland That is a video I'm looking forward to. My guess would be that there are far more than 1100 niches in that area of amazonian rain forest. The greater the variety of life there is the more opportunity appear to become available for more life.
Really enjoying these videos
Much enjoy creating them and delighted you and others get pleasure from them.
Very interesting... thanks!
Glad you enjoyed it. Was fun to film.
I really admire your work Bill. The breadth and scope of your knowledge reflect the essence of ecology - seeing the context, process and connectedness of life. This post is another example of that.
Many thanks Peter - very generous of you to say this. I gain a lot from trying to think through the fundamentals and often learn. For example, I hadn’t previously thought about the lack of runoff in chalk landscapes keeping the water clear.
Loving these Bill!
Very kind. Many thanks.
Many thanks. I love doing them.
Love this Bill, fascinating stuff 😁
Thanks Alexi. Very kind of you. Find them interesting and fun to do. More this weekend.
Dear Bill, Few notes 1. Please use the Latin name [Ailanthus altissima] also (Tree of Heaven is an English local name, assuming English speakers know it better), Scientific names are universal and well understood too. 2. Buddleia >> Buddleja davidii || 3. Common Names: Rock cotoneaster, rockspray cotoneaster, wall cotoneaster Botanical Name Cotoneaster horizontalis Family Rosaceae Plant Type Shrub 3. Thank you for the tiny information capsule. Enriching !
Another great video, thanks!! I’ve been noticing a lot of bindweed around Cambridge this summer, taking over wildflower patches and lots down by the river. There were stretches along the cam tow path where it had covered everything. Is there anything that keeps a climber like bindweed in check? Is it bad for the ecosystem when it does too well?
Was also by a river at the weekend with dense bindweed. Would guess it provides greater structure but might be an issue if a rare species present, but that is just speculation. I should do some reading!