all ships and planes can transport floor and forth into eco systems where they don't belong awful think you're in a fight for survival between species impact and the devastated. fisherman outs before dawn kalyan their trade in the gulf of goddess. the bay on tunisia's east coast is around 100 kilometers long in recent times the fishermen have had to stray even further from the coast to catch fish when you're about to start and it's not that i've been a fisherman for 38 years and a lot has changed in that time for 20 years ago we used to catch loads of prawns but in recent years there have been repeated events that have reduced our catch the latest problem was the blue crab they wiped out everything with the grub out of. the 1st blue crab so sported here at the end of 2014 it's

a species that was previously unknown in tunisia their numbers increased rapidly and within 8 months the crabs had become of you menace they would cut the fishing nets eat the fish and divonne anything else they could find they became such a problem that the fisherman nicknamed them dyess after the notorious militant group islamic state the blue crab is native to the india pacifist region they came here father red sea and the suez canal like most of the roughly 1000 non-native species that have rich the mediterranean at tunisia's national institutes of marine sciences and technology also been abdalla and her team is studying the blue crabs. the scientists akiane to learn more about this destructive species how fast do the crabs grow how quickly do they reproduce and how do they impact other species when

they arrive in a new area to help answer these questions they're analyzing the contents of the crab still marks. there on the latest blue crab is an extremely verey species. and even the crabs are basically insatiable they'll feed on all kinds of prairie. prawns for example also eat several of pods like squid. fish and they prey on the fish that live in the gulf of her important for the fishing industry. but the blue crab could also pose a threat to another much larger marine animal the sea turtle the mediterranean is home to 3 species of turtle all of which are endangered they got her in the gulf of gabbers to feed and to spend the winter to the north korea island is an

important nesting ground for the log ahead turtle which lays its eggs at just a few sites on the island just a few kilometers away on the mainland hatem is currently being cared for the adult female is more than 30 years old she's mount norrish and has a large fishing hook inside her fate suffered by many sea turtles the scientists here say injuries from both propellers are also common they found these species of plastic in hatton's feces the pollution of the seas is another huge threat to the turtles around 2 thirds of the animals examined here have plastic inside their bodies the scientists record and keep everything they find. it appears in

the turtles are very important for the marine ecosystem that will they maintain the balance in the food chain communication and the loggerhead turtle for example it's everything and it will eat a crabs and mollusks the fish jellyfish here but make sure no individual species can take over if things start to tip out of balance the sea turtle helps to get things back into equilibrium heaven he or she is. in the capital soonest we visit another la barra tree this one focuses on developing aquatic bio pro dots the research is here to study marine organisms to identify natural substances that could be used in cosmetics and other applications they found that the meats of the blue crab is rich in various proteins by turning the crab meats into a powder they've developed

a protein rich food supplements so now the blue crab has an appeal for the domestic market to the blue crab allport destroyed the livelihoods of many fishermen but now it's become a source of income allowing the fishing industry to survive and by catching the news in the crabs this invasive species is being kept on the control of tunisia's coast. children to come to. one giant problem and near it in a limitless in a period. in 5 little pieces is a foolish outlook. how will climate change affect us and our children.

w dot com slash water. anyone who's ever been to south africa will of the thousands of kilometers a friend sent that cuts across the learned usually decide to keep life story in place now faces also have the structure consequences for the local environments in addition to being what life you also prevent animals from roaming freely which leads to over grayson land degradation and biodiversity loss now some heard us know reversing the strain. and they're heading on the ecological revolution. when livestock wanted a great place of a card room in central south africa. aren't allowed to linger about. 2 percent of education from the reason they have to be kept on the move so they can only eat statistical diplomats headship objects in the house yes experience and i've seen hard landscape has changed since has been grazing is i mean most here. it is.

that. this is in the past growth was not that mice but now since we have put it you see process ok. 2 we claim that nor is it good no change or increasing pressure is a quote that you. are part of the ship biodiversity project that supports commercial livestock keeping well boost in london to ration on this 24000 hectare farm. the car also lost much green on home to millions of until up and buffalo loose in the top soil and yet crop and met life stadium. in a bid to recreate degreed migrations of the past the project employs to knead lives talk to people who smoke this is a project to beat out he's confident that headis can help them get this right from

the. because we fundamentally believe that this method or farming give space for wildlife to co-exist with production agriculture so that's really simple vision is to find a mechanism by which we can. foster biodiversity on production farms. the thousands of kilometers of fences needed for intensive livestock i recall one of the main reasons why wildlife disappeared fences prevent the animals from roaming free as they search for grazing land and water they often end up tangled in. you know not to study the effects of defenseless woman method on the environment ecologist are monitoring the project over the past 2 years research models and a group of students have recorded the number of plant species in selected study

sites. the group evaluates the for duty index the index is the term in by the amount of green seen on the ground by satellites and allows researches to compare plant growth in different regions over time. and you can already start picking up changes in trains within way the herd has been grazing especially over a longer recent period in parts of the farm and the green index shows up quite pronounced and we compared it to traditional farms where it isn't quite as pronounced and they seem to be quite a significant color it's just looking at the pixels alone you know and taking the green out of pixelization but from that learn you can really start seeing a difference there are many positive signs areas that have been grazed by the have seen the cut plant growth slowly wild animals are returning to the farm more than $500.00 until counted and even a leopard was recently sighted. it wouldn't be spawning have been found as

russia but however this season turned out to be very successful i'm about $800.00 sheep to the herd slowly but surely the project is 10 into a profitable venture. there. by destroying the plants and animals and i call systems without destroying the basis of foreign existence hopefully you found actual us insights with us i did time for me to say goodbye from bush garden in lagos i'm priscilla thanks for watching i'll see you next time. by case that all you all of us remember to try and do you have need of conservation you might even want to join one of the many initiatives helping to god away environment do join us next on you can i am send a tweet notice saying goodbye from campolo here in uganda.

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have been trying to find out for decades that's the key to the answer gravitational . the searchers are using the sensors to listen to finishing. to receive signals from the dark side of the universe. in 75 minutes on t.w. . the life on earth one of the coming to the end. of. a gigantic coincidence. better than the previously the earth was just a mess the chemistry lab thought mission. where the impossible happened.

true justice to the creation of our solar system with our planet is a bit like winning the lottery there isn't a. leaf earth. starts feb 11th on d w. i . s. b throws you know forward. in those slowly slowly. losing the rules. there's no use. for the week. goes

a long. string of. a constant. couldn't sleep. in a school. the state of the news and these are our top stories a russian court has ordered opposition figure alexei navalny to present to serve out a 3 and a half year sentence he was detained last month for violating the terms of his probation 70 was accused of failing to check in with authorities because he was in germany to recover.