Mangroves

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Mangroves are many species of tree adapted to living in salty water along coastlines and tidal rivers not far from the equator. They are remarkable in many ways and confer a host of benefits to their habitats. Here are some significant ones.

Protect

Mangroves and mangrove habitats play a major role in protecting coastal settlements from storm surges and waves. Mangroves significantly reduce the energy of waves, lowering wave height inland, including from tsunamis, and reduce surges from tropical storms. We took a boat through the mangroves in Southern Vietnam once, and it was an eye-opening maze of channels and islands. I could see how they act like a natural breakwater.

Stabilise

Mangroves help stabilise land from erosion. This helps plants and fauna inland make their homes. Mangrove root systems also trap sediment brought downriver or from the sea, building their environment and creating peaty soil when they decay.

Nurture

Their incredible prop root network creates a wonderful sheltered space for marine wildlife to grow and develop. The nooks and crannies help protect young from predators until they are older and can better fend for themselves. This protective environment increases populations and helps local fishers and communities. The calm and sheltered waters inside mangrove habitats also provide sanctuary for birds and a host of other non-marine wildlife.

Sequester

Mangroves are an excellent carbon sink. They capture carbon as they grow, and the low-oxygen sediments deposited beneath them help lock carbon away.

—

I've contributed to plant trees through Eden Projects with a portion of any monthly or one-off support I receive. I wanted to explain Mangroves partly because, as of July 2023, together, we've passed 26,000 trees planted, most in mangrove restoration projects in Madagascar , and provided over 350 work days for locals.

As Eden Projects explain:

"Madagascar is one of the world's top biodiversity conservation priorities because of its endemic species and severe habitat loss rates. Restoration in Madagascar is important because the destruction of the mangrove estuaries along the coastline has caused mudflats to wash into the ocean, destroying once-productive fisheries and increasing the vulnerability of coastal communities to hurricanes, tsunamis, and floods. In the dry deciduous forests, deforestation threatens one of the world's rarest and most diverse forest systems."

Mangroves make a real difference. To everyone who's helped make this happen, thank you!

Published 16 Jul 2023

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The fight-or-flight response is our body's automatic and ancient response to perceived threats or danger. This innate physiological response in animals and humans prepares us to either confront a threat (fight) or flee from it (flight). This mechanism, often referred to as entering fight-or-flight mode, likely played a critical role in our survival. Face to face with a tiger At the annual Wildlife Photographer of the Year Awards, I saw an astonishing photo of a tiger surprising workers in a field (Tiger Run by Nejib Ahmed). Everyone is in flight mode except one man, much braver than me, who perhaps through instinct has stood to fight, staring down the approaching tiger with a long stick. The photo is captivating in its drama and struck me as a perfect fight-or-flight example in action. Thankfully, no one—including the tiger—was hurt in this instance. The adrenalin that can flood our bodies during such moments may sometimes give us strength to do what we didn't expect, surprising ourselves with what we are capable of—Nicola Morgan, when discussing the amazing teenage brain, gives an example of her leaping a 5ft fence and looking back with amazement. Sudden strength or speed like this is a well-known fight-or-flight symptom. Reptilian brain, Lizard brain The fight-or-flight response is linked to theories about how different parts of the brain developed during our evolution. Modern research has corrected some aspects of this idea, but the basic concept remains. The most primitive parts of the brain—those we may share with, say, dinosaurs—are responsible for automatic behaviours like protecting territory, aggression, fear and fending off danger. This is often referred to as the reptilian brain or lizard brain. These brain areas are key to our survival instincts and play a critical role in activating fight-or-flight mode. Years of evolution since then have given us brain structures like the limbic system, which is responsible for our emotions and social behaviours. The amygdala, part of the limbic system, is especially important in triggering fear and the fight-or-flight response. Later, the neocortex evolved, enabling humans to assess threats rationally, solve problems, and make decisions—giving us more control over how we respond to fear or anxiety. The response, also illustrated by the snake rearing up in the sketch, is a fallback to our oldest instincts from the oldest parts of our brain when faced with a threat, so the theory goes. Freeze, Flight, Fight, Fright Fight-or-flight psychology, coined by physiologist Walter Cannon in 1915, is only part of a broader spectrum of acute stress responses. A more accurate sequence we experience may be freeze, flight, fight, or fright. 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Also see: Box breathing The spotlight effect Don't make important decisions on an empty stomach Cognitive overhead See Big Ideas Little Pictures for Melissa Dahl's Awkwardness Vortex and the technique of reframing anxiety as excitement…The fight-or-flight response is our body's automatic and ancient response to perceived threats or danger. This innate physiological response in animals and humans prepares us to either confront a threat (fight) or flee from it (flight). This mechanism, often referred to as entering fight-or-flight mode, likely played a critical role in our survival. Face to face with a tiger At the annual Wildlife Photographer of the Year Awards, I saw an astonishing photo of a tiger surprising workers in a field (Tiger Run by Nejib Ahmed). Everyone is in flight mode except one man, much braver than me, who perhaps through instinct has stood to fight, staring down the approaching tiger with a long stick. The photo is captivating in its drama and struck me as a perfect fight-or-flight example in action. Thankfully, no one—including the tiger—was hurt in this instance. The adrenalin that can flood our bodies during such moments may sometimes give us strength to do what we didn't expect, surprising ourselves with what we are capable of—Nicola Morgan, when discussing the amazing teenage brain, gives an example of her leaping a 5ft fence and looking back with amazement. Sudden strength or speed like this is a well-known fight-or-flight symptom. Reptilian brain, Lizard brain The fight-or-flight response is linked to theories about how different parts of the brain developed during our evolution. Modern research has corrected some aspects of this idea, but the basic concept remains. The most primitive parts of the brain—those we may share with, say, dinosaurs—are responsible for automatic behaviours like protecting territory, aggression, fear and fending off danger. This is often referred to as the reptilian brain or lizard brain. These brain areas are key to our survival instincts and play a critical role in activating fight-or-flight mode. Years of evolution since then have given us brain structures like the limbic system, which is responsible for our emotions and social behaviours. The amygdala, part of the limbic system, is especially important in triggering fear and the fight-or-flight response. Later, the neocortex evolved, enabling humans to assess threats rationally, solve problems, and make decisions—giving us more control over how we respond to fear or anxiety. The response, also illustrated by the snake rearing up in the sketch, is a fallback to our oldest instincts from the oldest parts of our brain when faced with a threat, so the theory goes. Freeze, Flight, Fight, Fright Fight-or-flight psychology, coined by physiologist Walter Cannon in 1915, is only part of a broader spectrum of acute stress responses. A more accurate sequence we experience may be freeze, flight, fight, or fright. Freeze: Our immediate reaction to danger might be to "stop, look, listen," remaining hyper-vigilant while we assess the threat, and perhaps hope by not moving, the dinosaur won't spot us. Flight: We may flee the situation to safety. Fight: If escape isn't possible, we might fight back, as shown by the brave individual in the tiger photo. Fright: This might include panic and immobility, playing dead in case a predator decides we're not worth eating after all. As you see, the updated list continues with excellent alliteration, which no doubt helped make the idea sticky in the first place (other proposals add fawn, faint, flock and more). When Fight-or-Flight Doesn't Help While the tiger scenario shows our ancient brain instincts at work, most modern-day situations don't involve life-or-death threats. However, we may still enter fight-or-flight mode during stressful, anxiety-inducing moments, such as public speaking, a challenging work interaction, or a difficult conversation. In these cases, our age-old reactions may not serve us well. The same ancient brain that would help us survive a predator may now cause us to avoid daunting tasks. Whether it's a work presentation, a cold sales call, or confronting a personal issue, we may feel the urge to retreat from the action and get a snack from the kitchen instead. When our ancient instincts—so finely tuned for survival—are no longer serving us in modern situations, it's helpful to pause and let our higher-order thinking take the lead. Techniques like box breathing or meditation help calm the body and mind, allowing us to move beyond fear and resistance. By doing so, we can overcome the automatic urge to "fight or flight," or even freeze or fright, and instead respond with clarity, control, and confidence. Also see: Box breathing The spotlight effect Don't make important decisions on an empty stomach Cognitive overhead See Big Ideas Little Pictures for Melissa Dahl's Awkwardness Vortex and the technique of reframing anxiety as excitement

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