The Fascinating Adaptations of Life in the extreme Environment of Vietnam's Mangroves | SLICE WILD

Estimated read time: 1:20

Summary

The video explores the unique ecosystems of Vietnam's mangroves, highlighting their rich biodiversity and the fascinating adaptations of species to this challenging environment. Despite past destruction from the Vietnam War, the mangroves are experiencing a renaissance due to conservation efforts. The forests are not only a sanctuary for wildlife like the giant flying fox and Siam crocodiles but also serve as vital resources for local communities who rely on them for food and medicinal plants. The video delves into the intricate balance of life that allows the mangroves to thrive, including the crucial roles played by crabs and bats in the ecosystem. It also touches on the promising conservation successes being achieved to safeguard this vital habitat.

Highlights

Mangroves thrive in saltwater environments with aerial roots. 🌿
Vietnam's mangroves have rejuvenated after war-time devastation. 🎇
The resilient mangroves of the Mekong Delta host a variety of wildlife including giant flying foxes and Siam crocodiles. 🐊
Local communities engage in sustainable use of mangrove resources for markets and medicine. 🌿
Crabs play a significant role in maintaining nutrient cycles and ecosystem health in the mangroves. 🦀

Key Takeaways

Mangroves are unique ecosystems capable of surviving in saltwater thanks to their aerial roots. 🌊
Vietnam's mangroves have bounced back from war-time destruction and are now thriving with biodiversity. 🌱
Local communities benefit greatly from the mangroves, using them for food and medicinal purposes. 🍲
The diverse species, including crabs and bats, play crucial ecological roles in maintaining the health of the mangrove forests. 🦀
Conservation efforts have led to a resurgence in wildlife, including the threatened giant flying fox and Siam crocodile. 🦇

Overview

The fascinating world of Vietnam's mangroves is a tale of resilience and revival. These unique ecosystems are filled with life forms that have adapted to both the saltwater and the murky, muddy environment. The video highlights how mangroves, once devastated by chemical warfare during the Vietnam War, are rejuvenating thanks to robust conservation efforts. From the giant flying foxes, which play a key ecological role in seed dispersal, to the endangered Siam crocodiles, these forests are now a haven for wildlife.

Crabs, often overlooked, are unsung heroes of the mangrove ecosystems, contributing significantly to nutrient cycling and soil aeration. The mangroves also serve as a lifeline to local communities providing food, shelter, and medicinal plants. This delicate dance of life, from the smallest crab to the largest bat, showcases the intertwined dependencies that keep these ecosystems thriving. The video succeeds in bringing to light how important these habitats are, not just for Vietnam, but globally.

Finally, the human aspect is not forgotten. The film delves into how local inhabitants and conservationists work hand in hand to preserve this vital environment. It points out the successful conservation strategies that have allowed the rebirth of these areas. The rediscovery and study of lesser-known species such as the rambong snake add new layers to our understanding of this vibrant environment. Ultimately, the video inspires a sense of wonder and urgency for the continued protection and study of mangrove ecosystems worldwide.

Chapters

00:00 - 01:30: Introduction to Mangroves This chapter introduces mangroves as a unique tropical ecosystem, highlighting their distinctive ability to grow with roots submerged in water. Unlike other forests, mangroves thrive in saline environments, showcasing trees specialized to live in salt water.
01:30 - 03:00: Life in Vietnamese Mangroves This chapter explores the unique ecosystem of Vietnamese mangroves, detailing how the aerial roots of mangrove trees adapt to the varying water conditions and provide essential resources and protection for those familiar with this environment.
03:00 - 06:00: Recovery and Conservation Efforts The chapter titled 'Recovery and Conservation Efforts' focuses on the vibrant and bustling life found within Vietnamese mangroves. This dense ecosystem is teeming with a multitude of species, highlighting the rich biodiversity and complex interplay of life forms within these natural communities.
06:00 - 10:30: Ecological Role of Giant Flying Foxes The chapter titled 'Ecological Role of Giant Flying Foxes' explores the diverse ecological interactions in the mangroves of Vietnam. It starts with describing non-primate lizards that stealthily navigate through the complex network of roots, jumping from branch to branch with agility. The chapter highlights the amphibian lifestyle of reptiles and fish in this unique ecosystem. The mangroves play a crucial role in supporting these varied forms of life, showcasing a rich and interconnected web of biodiversity.
10:30 - 17:00: Impact of Vietnam War on Mangroves The chapter discusses the impact of the Vietnam War on mangroves and their subsequent recovery and resilience. Despite being hit by industrial exploitation and regularly damaged by typhoons, the mangroves in the south of Vietnam, particularly in the Mong Delta, are beginning to experience a renaissance.
17:00 - 18:00: Reforestation Initiatives This chapter, titled 'Reforestation Initiatives', highlights efforts to protect and restore natural environments, particularly focusing on regions now classed as protected zones. These areas serve as emblems of a renaissance in ecological conservation. The chapter underscores the significance of regions like the Muddy Waters of the Mong, which benefit from the tropical greenhouse climate near the Tropic of Cancer, creating an ideal environment for mangroves. It describes the delta as an expansive and swampy area that plays a crucial role in the ecosystem.
18:00 - 22:00: Scientific Research on Mangroves The chapter provides insights into the lives of the 18 million people living at the border of mangroves, highlighting their interaction with both land and water. The fertile silt found in these areas is beneficial for market gardening, which is an essential part of the local economy.
22:00 - 24:00: Importance of Crabs in the Ecosystem Many villagers engage in fishing in the calm, shallow waters of the Delta, particularly among the mangroves, which serve as nurseries for fish, crustaceans, and shellfish. The dense and difficult-to-access environment of the mangroves has traditionally been overlooked, leading to a lack of recognition and understanding of its valuable resources.
24:00 - 28:00: Threats and Conservation of Siam Crocodiles The chapter titled 'Threats and Conservation of Siam Crocodiles' introduces the guardianship role of the rangers at the Kango Reserve. It highlights the presence of giant flying foxes, which symbolize the fear and mystery surrounding Mangrove forests. The narrative sets a scene of vigilance and protection for these unique habitats, indirectly pointing to the threats faced by the wildlife, including the Siam Crocodiles, in such environments.
28:00 - 33:00: Medicinal Plants and Local Initiatives This chapter discusses the giant flying fox, a bat species with a wingspan up to 1 meter 70 centimeters, making it one of the largest bats. Locally known as the Flying Fox, it has a significant ecological role in promoting reforestation through the dispersal of seeds from the fruits it eats. However, the species faces threats due to intense hunting, impacting its population and ecological functions.
33:00 - 35:00: Unique Reptiles and Amphibians of Mangroves In this chapter, the focus is on the unique reptiles and amphibians inhabiting mangrove ecosystems. The narrative parallels the life of bats, touching upon their classification as nearly threatened outside protected areas. Bats seek calm daytime retreats, returning each morning after nightly foraging trips, highlighting their integral role in and dependence on specific habitats like mangroves.
35:00 - 37:00: Adaptations of Ran Bong Snake The chapter discusses the adaptations of the Ran Bong Snake, focusing on how these creatures adapt to their environment such as flying foxes which do not use echolocation but rather rely on their sense of smell. They participate in pollination by feeding on flowers and pollen. The mangroves provide a secure habitat for them, especially during storms like the one that occurred in 2018.
37:00 - 41:00: Conservation and Cultural Significance The chapter explores the theme of conservation and cultural significance, highlighting the behavior of bats as they take shelter at the base of trees and roots. It describes how an adventurous colony of bats migrated from mangroves upstream in the Mekong Delta, choosing not to settle in the surrounding trees but instead in the gardens of a new area.

The Fascinating Adaptations of Life in the extreme Environment of Vietnam's Mangroves | SLICE WILD Transcription

00:00 - 00:30 [Music] mangroves are a tropical ecosystem amongst the least known on the [Music] planet these forests are like no others they grow with their roots in water rocked by the rhythm of tithes and are made up of unusual trees mangroves the only trees capable of living in salt
00:30 - 01:00 water and breathing thanks to their aerial Roots sometimes drowned and sometimes dry muddy silty The Mangrove is impenetrable mysterious and hostile but for those who spend time there it offers a protective space a sanctuary rich in many precious resources [Music]
01:00 - 01:30 Vietnamese mangroves swarm with intense life a multitude of species people the dense maze
01:30 - 02:00 Sans primates lizards steal their way through the net of roots leap from one branch to the [Music] next reptiles and fish lead a disconcertingly amphibian [Music] life the mangrove of Vietnam have made a
02:00 - 02:30 spectacular recovery survivors of the war nowadays hit by industrial exploitation regularly damaged by typhoons still they are beginning a [Music] Renaissance in the south of Vietnam in the Mong Delta the mangroves of Kango
02:30 - 03:00 and Cal now classed as protected zones are emblems of that [Music] Renaissance the Muddy Waters of the Mong and the humid Greenhouse climate of the Tropic of Cancer are an ideal cocktail for [Music] mangroves the Delta is a vast swampy PL
03:00 - 03:30 home to 18 million inhabitants the populations living at the edges of the mangroves are also playing on two Fields Land and [Music] Water the fertile silt is good for Market gardening [Music]
03:30 - 04:00 lots of villagers also fish in the calm shallow Waters of the Delta the mangroves are a nursery for fish Crustaceans and [Music] shellfish this dense and hard to access environment has for a long time been closed up upon itself as a result its resources have been underestimated and are still poorly known
04:00 - 04:30 the Rangers of the Kango Reserve watch over a remarkable species hey tan there are lots up there giant flying foxes are the Incarnation of the fear and mystery associated with Mangrove forests
04:30 - 05:00 with a maximum wingspan of 1 M 70 the giant flying fox is one of the largest bats the Flying Fox as it is known locally plays a major ecological role it favors reforestation by spreading the seed from the fruit it consumes victims of intense hunting
05:00 - 05:30 outside protected zones the species is classified as nearly threatened these bats are just looking for a calm space where no one disturbs them to live peacefully in the day they sleep and at night they go looking for food to return here in the morning wherever they go they come back here because this is their
05:30 - 06:00 nest the flying foxes don't have echo location it's by their sense of smell that they are guided some feed on flowers and pollen thereby participating in the pollination of trees the luxuriant mangroves offer them a safe shelter when the heavens erupt in 2018 there was a great storm
06:00 - 06:30 and the bats took shelter at the base of the trees in the roots but they didn't leave some time ago an adventurous Colony left the mangroves and migrated further Upstream in the mikong Delta disdaining the trees around the colony set up in the Gardens of one of
06:30 - 07:00 the most beautiful K Buddhist pagodas built at the end of the 16th century The Colony has prospered now it numbers several thousand individuals and the bats have become a local attraction if you can believe the inhabitants the bats do not fly over the Pagoda but around it in respect which earns them the sympathy of the monks
07:00 - 07:30 [Music] [Applause] [Music] we don't kill them and I think that's why they shelter in the Pagoda they know they are safe here during the storms sometimes the tree branches break and the bats fall when that happens we pick them up and put them back on the trees so they
07:30 - 08:00 can fly Again The Colony has made the temple so well known that it is now called schad in tourist guides the bat Pagoda famous throughout Vietnam and Beyond [Music]
08:00 - 08:30 [Music] the monks are particularly attached to these flying talents the bats suit the spirit of the Pagoda they only eat fruit no meat no fish they do not kill in the Pagoda there is no killing either only fruit is eaten
08:30 - 09:00 the monks of the Pagoda interpret the company of the bats as a sign of harmony with the Living World during the Vietnam war the Pagoda was a center of resistance to what the nationalists called the American Invasion from the start of the conflict the mangroves appeared as a military objetive itive they were bombed to the
09:00 - 09:30 point they nearly [Music] disappeared ecologist hang was a witness to the ravages inflicted on the vegetation during the huge war led by the Americans in 1966 against North Vietnam and its Viet Kong allies
09:30 - 10:00 before 1970 the forest had many chemicals spread on it by the American Army during the war the consequences of this were very serious right up until 1977 when I came here all the trees were dead no leaves nothing but trunks remained several North Vietnamese and Viet Kong Army units infiltrated the Mong Delta and hid in the mangroves
10:00 - 10:30 ground attacks were bound to fail so the American Air Force bombed ceaselessly for seven years the green fortresses where the enemy were hiding tan wrote her doctoral thesis on the environmental impact of the Vietnam War among the documents which struck me the most were the military archives
10:30 - 11:00 which 30 years later were Declassified and that effort on such a huge scale to destroy the environment is quite impressive to destroy the tree cover the Americans decided to chemically burn the foliage of the trees with a defoliant which became notorious
11:00 - 11:30 between 1961 and 1971 the American Air Force LED 20,000 Air Raids to spread herbicide in the Mong Delta 80 million lers of Agent Orange was spread over the forests tatran has consulted hundreds of thousands of documents relative to this
11:30 - 12:00 period I was able to recover all the flight plans from the American Air Force and you can see through these campaigns of herbicide spraying on the vegetation the ground covered by the planes that were spraying and here on the map it was specifically agent orange on this satellite image just after the war in 1973 you can see clearly that these American flights correspond to the the holes visible in the
12:00 - 12:30 vegetation agent orange left in its Trail shattered vegetation and soil that was poisoned for a long time the mangroves of Cano disappeared up to 99 or even 100% And now when we return you don't get the impression there was a war
12:30 - 13:00 the reforestation site of DH High which aimed to regenerate the mangroves as quickly as possible was begun at hoochi men City in 1978 3 years after the end of the war the mangroves of Kango which were practically reduced to Nothing Now cover 75,000 hectares seven times the size of Paris Queen hang FM has studied the natural cycles of the kja mangroves for
13:00 - 13:30 20 [Applause] years this mango is really my second home also another office another lab for me we have conducted uh many researches here in the manov in G manov since 2004 each piece of the puzzle is important and everything starts in the ground
13:30 - 14:00 we usually measure the sediment cuse because we want to see the changes of the nutrients State along with the dep in the different layers the team also records the temperature the acidity and the rate of humidity which influence the fertility of the ground we would like to understand the correlation or the coupling between the sediment nutritional state with the
14:00 - 14:30 growth of the vegetation there was a very tight coupling between the concentration at the 40 to 45 cm with the concentration of nutrients in the leaves the trees search out their fuel 40 cm underground the Dead Leaves which fall from the foliage make up most of the organic material that enriches the
14:30 - 15:00 [Music] soil Wong and her team Place Nets in different places in the mangroves to estimate the amount of Dead Leaves produced each month by the trees
15:00 - 15:30 due to the leaf lit production we can estimate how much nutrients can be given back to the sediment you know that the the leaf and the the tricks and the branches and even truns will be decomposed to release the the nutrient back to the [Music] sediment rocked by the air and flow of Tides the mangroves are no ordinary
15:30 - 16:00 Forest the circulation of water washes and dilutes the salt that accumulates on the surface of the mud but also carries the Dead Leaves to the Sea deprived of organic material the mangroves would become steril if there wasn't a population of tireless gardeners [Music]
16:00 - 16:30 the gra played an important role in keeping the leaves in the bottom of their burrow and let the leaf decomposed there and that's a way to keep the organic M and the sediment Flor which can subsequent release the nutrients to the sediment it's estimated that the crabs bury over 80% of the leaves that fall
16:30 - 17:00 each day moreover the crab barels help to oxygenate the sediment floor and accelerate the decomposition of the organic maror without the crab Burrows the sediment I mean the bacteria in the sediment and the other plants may be Toxic by the lack of oxygen in the sediment because then they will release the toxic gases like hydrosulfide or
17:00 - 17:30 [Music] mean crabs are essential to the life of the mangroves which explains why their health and diversity are closely monitored by scientists the team of Queen hang periodically checked the state of health of the crab population of Kanga
17:30 - 18:00 now that the tide has just gone out they don't come out much yet you have to watch the holes for example this hole here and try and see if there are crabs climbing up and out and check those holes when we're sure there are crabs in a hole we get into position there you see there there's the
18:00 - 18:30 hole and dig like that while covering the other side with the other [Music] hand okay once this technical demonstration is done the crab collection can begin [Music]
18:30 - 19:00 to have a representative sample the team catch specimens of different species males and females juveniles and [Music] adults to the naked eye if you don't have much scientific knowledge you could think they all belong to the same species but I think there are two or
19:00 - 19:30 three different species here how can you tell that thanks to the colors it's true that the color is a fundamental indicator to distinguish the species and there's a second criteria that's the size of the [Music] pincers the more crabs there are the greater the quantity of leaves buried in the mud [Music]
19:30 - 20:00 the Richer the soil is in organic matter the better for the mangroves the crabs are also a choice meal for the [Music] Apes to better distinguish their colors and the details of their shells the researchers rinse the crabs you have to hold the lid or a will
20:00 - 20:30 [Music] escape now we're going to measure the crabs we've collected here the crab eating ma don't lose a morsel of the scientist's
20:30 - 21:00 work size lets us know the age of the crabs which live between 8 and 15 years 5 2 cm 38 the measurements show satisfying diversity of species and ages proof of mangroves in good [Music] health the crab eating maacs owe their name to their pronounced taste for crabs they're also called called longtailed ma
21:00 - 21:30 the species is found all over southeast Asia the crab eaters live in communities the largest having over 60 [Music] individuals the domain of a colony is around a square kilometer in size the crab eaters are opportunists and feed on whatever they find fruit seeds leaves bark as well as lizards frogs fish and of course
21:30 - 22:00 Crustaceans are all on the [Music] menu the dominant males are very aggressive with their Rivals and despotic with females and the young over whom they exert power
22:00 - 22:30 when The Tide Rises all the colony go up into the canopy [Music] [Music]
22:30 - 23:00 the crab eaters live close to the water and are good swimmers but at Kang jaao having an unexpected bath is not without risks The Siam crocodile has long haunted the
23:00 - 23:30 channels of the Mong Delta once very widespread throughout the indo-chinese peninsula This Magnificent soran with its slender body that can grow to 3 m long is No More Than A Memory in many places the total number of individuals is
23:30 - 24:00 estimated to be no more than a few hundred the last Vietnamese crocodiles are under close [Music] watch the Rangers Patrol over the 75,000 hectares of the natural reserve of K
24:00 - 24:30 that shelters the last Siam [Music] crocodiles before 1975 there were lots of crocod here
24:30 - 25:00 roundabout but after that date the fishing boats got more numerous in this Zone and the crocodiles almost disappeared in the reserve under the protection of the Rangers the crocodiles are returning [Music] the mangroves of kja are also a precious
25:00 - 25:30 reserve of biodiverse [Music] vegetation Dr son is very knowledgeable about the plants which grow here he's interested in special varieties roots stems or leaves which have particular Cur ative [Music]
25:30 - 26:00 properties he often comes to collect these medicinal Essences in the company of Madame Mo the head of a charitable Pagoda this plant gives one of the plant essence is known as warming which are
26:00 - 26:30 used to treat coughs aches and colds this route is a draining Essence which works against water retention this is a detoxifying plant good for rashes and inflammatory pains [Music]
26:30 - 27:00 the charitable pagod of hung tantu was created 50 years [Music] ago medicines prepared from medicinal plants are made and distributed there
27:00 - 27:30 Madam Mo directs The Artisan workshops where powders capsules and infusions are [Music] made once the plants have been collected they're rinsed in water if necessary to wash them and remove impurities then they're drained and dried and it's
27:30 - 28:00 only after this that we can begin to make medicine from [Music] them drying is a delicate phase watched closely by Madam Mo the plants need to be sufficiently dehydrated to concentrate the active ingredients but the sun must not burn them either
28:00 - 28:30 [Music] nearly 200 species of plants are used to make the [Music] medicines this pagota was created for the well-being and health of the surrounding population everyone contributes to its running and all can work there voluntarily by giving a little time you can
28:30 - 29:00 contribute to the common good and permit everyone to have access to healthcare it's in this spirit that the creator of the Pagoda wish to [Music] work the inhabitants of the neighboring Villages and the whole region as well know about the Pagoda which welcomes up to 150 patients each day they come to be treated for stomach upsets rheumatism diabetes or simple
29:00 - 29:30 [Music] headaches the varieties of plants found in the mangroves depend upon the geographic and climatic [Music] environment the temperature soil composition the degree of salinity affect the Flora but also the forer [Music]
29:30 - 30:00 the Red River delta 150 km southeast of Hanoi is an ecosystem specific to the coast of North Vietnam the mangroves of chantu were classed as a wetland of international importance in 1989 they shelter species of reptiles and
30:00 - 30:30 amphibians that are still little known the mangroves of changui are well known to changwang engan this Reptile Specialist has been researching in the field for 10 years here studying the rang bong one of the
30:30 - 31:00 rare species of snake perfectly adapted to this environment of mud and salty water this aquatic snake feeds mainly on small fish the species of reptiles and amphibians of the mangroves have been little St sted because the habitat is hostile and difficult to
31:00 - 31:30 access the rambong was only observed in the Red River delta in 2014 yo I've got one it was trong kuang who first observed them here at [Music] chant 23 mm more or less and here we see its breathing holes turned to the sky so
31:30 - 32:00 as to better breathe on the [Music] surface breathing orifices placed on the top of the head are one of the crucial adaptations of the snake to the flooded environment of the mangroves [Music] [Music]
32:00 - 32:30 this is the typical ran bong habitat at low tide it hides in holes and a high tide comes up to the surface to [Music] breathe in this environment the rambong has the ideal camouflage [Music]
32:30 - 33:00 if its brown color isn't enough to allow it to pass unseen in case of danger it buries itself in the [Music] mud the ease with which it buries itself is precious to it in the typhoon season
33:00 - 33:30 [Music] when there is very disturbed weather when a typhoon approaches the snakes feel it in advance in this situation the snakes take shelter they take refuge in holes before tempests [Music] arrive another of the crucial adaptations of the ran bong is its
33:30 - 34:00 capacity to withstand a saline environment it can actually excrete the Surplus intake of toxic [Music] salt a further coldblooded species the crab frog has also adapted to the Salt Laden water of the mangroves while the ran bong can be observed in the day the crab from FR only comes out at
34:00 - 34:30 night that's a crab frog it's the emblem of the mangroves it can excrete excess salt thanks to a filtering system in its kidneys
34:30 - 35:00 the chantu reserve is the most southern region of Asia where the r bong live although they are now protected the snakes of the mangroves were long hunted since in Vietnam the reptiles had an important place in traditional medicine
35:00 - 35:30 and culinary culture cobras which lived in the least flooded parts of the mangroves were decimated and are now on the list of endangered species hunting is now banned and the restaurants which cook snakes have to raise the reptiles themselves [Music]