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How Genetics and Pollution Are Threatening Wild Dolphins

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Dolphins are beautiful, highly intelligent and uncannily human in their interactions. Yet, they also have a language we humans cannot fully hear, and a culture that is in some ways similar to our own, and in others, a complete mystery.

Like us, they have circles of friends and acquaintances, with different greetings for different individuals, as if by name. They travel swiftly within a home range of about 100-square kilometers but can go further when they want to. They have the sleek design of a jet plane fuselage and the intelligence that comes with a 1,600-gram complexly structured brain. (The human brain is 1,300 grams.)

Found in almost all the world’s oceans, they communicate with friends and family through clicks and whistles, and echolocation allows them to view the world around them. They pass on knowledge of culture and tools through the generations from mother to daughter, a matrilineal line that preserves and protects their heritage.

Approximately 40 species of dolphins exist. Many belong to the Delphinidae (ocean dolphin) family, including the orca; others live in rivers. Collectively, there are approximately 90 species of cetaceans, the order comprising whales, dolphins and porpoises.

Scientists analyzing the dolphin brain have determined that, like us, they possess a very complex neocortex — a region of the brain linked to awareness, emotions, problem-solving and other human-like abilities. Further, the limbic (emotional) system in some species is even more complex than humans.

These sensitive creatures have made the headlines in the past few months. An endangered orca known as Tahlequah mourned the tragic loss of her baby, carrying her dead calf for a record 17 days and 1,000 miles on what some have deemed a “tour of grief.”

Shortly following Tahlequah’s tragedy, the Center for Biological Diversity filed a lawsuit against the National Marine Fisheries Service regarding the species of orca on the West coast of the US that has become critically endangered. The suit alleged that the agency has neglected to establish habitat protection for the orcas. With only 75 of these orcas left, the population is the lowest it has been in 30 years.

Meanwhile, a combination of factors is threatening the very survival of these animals.

Genetics and Pollution

A recent study published in the journal Science delivers a serious warning as to the likelihood that dolphins and other marine mammals could be extirpated by pollutants. The discovery concerns an evolutionary change to DNA approximately 53 million years ago, which makes cetaceans particularly sensitive and therefore vulnerable.

Their bodies underwent various gradual changes during this evolutionary period. One of these changes was the alteration of DNA that codes for a particular enzyme known as PON1. Scientists believe the enzyme’s metabolic processes were no longer needed for a life underwater. Terrestrial mammals, by contrast, maintained the intact DNA and its enzyme, which humans have to this day.

But 53 million years later, the genetic change has become marine mammals’ Achilles’ heel, thanks to human invention. The enzyme has a second function — an ability to defend against neurotoxins found in pesticides. Without PON1, these animals are unable to break down the neurotoxin and can be poisoned.

Dolphins and other sea creatures with the PON1 problem are thus defenseless against agricultural runoff containing pesticides. Part of the reason the endangered infant orcas off the coast of California are having trouble is this kind of pollution. Marine mammals by the Florida coast are at risk as well, as scientists sampling waterways have found significant levels of chlorpyrifos pesticide contamination.

Dolphins have also been disappearing from areas around the globe they once inhabited, such as off the coast of Argentina. There, where dolphins were once common, only “a single resident population” is believed to be left. Heavy metal contamination and overfishing are likely contributors the decline. Elevated levels of lead, zinc, copper and cadmium have been found in mollusks, crustaceans and sea lions, as well as elevated levels of mercury, cadmium, zinc and copper in bottlenose dolphins. Metals pass from mother’s milk to the baby, resulting in the newborn dolphin having a weakened immune system and a lower probability of survival. The bottlenose dolphin is believed to be a common species globally and consequently people are less concerned about it than they should be; in certain localities these dolphins are quietly disappearing, as along the Argentinian coast. Scientists warn that the Argentina study “provides an example of how the failure to recognize local population declines can threaten the national (and eventually the international) status of a once common marine species.”

To be sure, dolphins are facing similar toxic threats around the world. While metal pollution off the coast of Argentina is assumed to have resulted from decades-old mine waste, it is by no means unique to South America. Scientists examining the waters of Lake Geneva, Switzerland, discovered high levels of toxic metals including bromine, lead, mercury and cadmium. The toxins came from plastics, some of which had been banned or restricted decades ago, indicating the toxins remain in the environment for years. Plastic pollution is especially pervasive in oceans that dolphins inhabit – estimated at 150 million metric tons, with 8 million more tons added annually. Tellingly, a Malaysian dolphin was found dead after digesting nine pounds of plastic bags.

Chemicals can have a lasting and sometimes irreversible impact on the environment. Without containment, poisons that were banned years ago seep out of landfills, into streams and oceans, permanently contaminating water. For some species, a death sentence has already been passed. Change has come too late for the orca variety of dolphin, also known as the killer whale. This is the sad revelation recently published in the journal Science regarding polychlorinated biphenyls (PCBs) and orcas. PCBs banned more than 30 years ago have leached into the oceans, and killer whales as apex predators are “the most PCB contaminated mammals in the world,” say the researchers, who found some of the killer whales had 1,300 milligrams per kilo of PCBs in their blubber – 50 milligrams per kilo has been shown in previous research to be sufficient to cause infertility and serious immune system problems. As with metals, mothers pass the PCBs on to their babies through milk. The researchers predict that “PCB-mediated effects on reproduction and immune function threaten the long-term viability of [more than] 50% of the world’s killer whale populations.” They forecast a population collapse of orcas near industrialized regions, as well as in regions where orcas feed on larger prey. In short, half of the world’s orcas will be gone in just a few decades.

Some dolphin species are already very close to extinction. The Yangtze River dolphin, also known as “baiji,” has lived in the river for 20 million years. There were thousands in the 1950s, but in the year 2000, there were a mere 13. By 2006, scientists pronounced the species extinct after an unsuccessful six-week hunt by conservationists. Its current status is either extinct or near extinction — in 2016, some amateurs believe they may have seen a baiji, although they are not certain. The baiji would be the first dolphin made extinct by humans, in this case through pollution, dam-building, overfishing and boat traffic.

Dolphins face threats from climate change as well. Twelve dolphins were washed ashore in one week this summer in Florida, as a result of a red tide disasterdue in part to rising temperatures, with six killed in 24 hours. Such numbers have usually been an annual loss in the past.

Dolphins face a particular and cruel peril in Japan. The town of Taiji holds an annual dolphin “drive hunt” in which more than 1,000 dolphins are massacred each year. Hunters find a pod of dolphins and first create a clamor to disrupt the dolphins’ sonar, upsetting the dolphins and driving them into a cove, where they are then killed one by one, as the water in the cove turns red.

Even when dolphins are captured and kept in captivity, they react to their surroundings.

Dolphin Intelligence and the Future of the Animal Population

That dolphins are highly emotional is well-known. Peter — a dolphin kept in captivity after being moved to a smaller facility and permanently separated from the regular keeper he loved — fell into depression. Dolphins do not breathe air automatically the way humans do; each breath must be made consciously. A dolphin who has lost the will to live does not swim to the surface for his next breath. This was the fate of Peter; imprisoned and friendless at the new facility, he did not swim up for air and was found lifeless on the tank floor.

The emotional intelligence of dolphins reveals that trauma and separation will hurt dolphin families for years to come. The bloody waters of Taiji might hold the carcasses but not all the casualties. The many Peters of the world, having lost loved ones forever, can also lose the will to live.

At the 2010 annual meeting of the American Association for the Advancement of Science, scientists pondered the ethical and policy implications of dolphin intelligence. Neurobiologist Lori Marino argued that they may be Earth’s second-smartest creature. One can only agree.

A philosopher at the meeting proposed that dolphins perhaps ought to be considered “nonhuman persons.” He marvels at how, in addition to emotions and self-awareness, dolphins have personalities, exhibit self-control and even treat others ethically.

If a dolphin species becomes extinct, we lose not only a beautiful animal but a society and its culture. Dolphin habitat often spans the seas of many countries. Preserving them at home only to have them slaughtered on another shore is heart-wrenching. Preserving them abroad only to see them poisoned by pollution here is equally tragic. Countries must work together to ensure the survival of dolphins who swim beyond our borders, particularly as risks are compounded by climate change and pollution. The killing of whales for commercial purposes has been banned for many years. At the very least, this can be extended to their cousins now that we know they are under threat.

Pesticide use has to be regulated, particularly along the coasts to minimize PON1-related neurotoxic poisoning. Allowing a 53-million-year-old Achilles’ heel to be shot with the dart of human invention would be a tragedy. Minimizing plastic pollution is essential to dolphins as well. Preventing further PCB leakage into the oceans must also be a priority to save the orca populations, half of which are already facing collapse due to PCB-poisoning.

We have already witnessed the long-lasting effects of chemical runoff, from the decades-old plastic-derived toxins in Lake Geneva, to the 30-year-old PCBs seeping into oceans around the world. Once waters are contaminated, no one can go back. It is already too late for some orcas. Consequently, while we still can, we must prevent further contamination.

If nations can work together to minimize ocean pollution and affect laws to prevent chemical runoff, perhaps then Tahlequah and her fellow orcas will have greater success with the next generation of calves, and our children and grandchildren will continue to know the pleasure of seeing an orca or a bottlenose dolphin leap magnificently from the ocean.

Author’s note: this article first appeared in Truthout.org.

Meena Miriam Yust is an attorney based in Chicago, Illinois. Educated at Vassar College and Case Western Reserve University School of Law, she published a draft Migratory Insect Treaty with commentary in the Case Western Reserve Journal of International Law.

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Green Planet

A Treaty to Preserve Oceans – And Our World

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There is cause for celebration in our climatically distressed world for a treaty of historic proportions has been signed by the UN member states.  It is the culmination of 15 years of talks and discussions.

Vital to the preservation of 30 percent of our earth, i.e. land and ocean, the oceans treaty broke many political barriers.  The EU environment commissioner Virginijus Sinkevicius applauded the event saying it was a crucial step towards preserving marine life and its essential biodiversity for generations to come. 

The UN Secretary General commended the delegates, his spokesperson calling the agreement a “victory for multilateralism and for global efforts to counter the destructive trends facing oceanhealth, now and for generations to come.”

The real problem is the oceans belong to no one — and thus available to everyone — because the exclusive economic zones of countries end beyond 200 nautical miles (370 kms) from their coastlines.

These high seas are threatened by overfishing, man-made pollution including damaging plastics, and also climate change.  People are unaware that oceans create half the oxygen we breathe, and help in containing global warming by absorbing the carbon dioxide released by human activities — one can think of all the coal and wood fires, particularly in developing countries, and the coal-fired power stations everywhere among other uses of fossil fuels.     

The fact is we have to value the environment that nurtures us for the consequences of our disregard can in the final analysis destroy life itself.  As it stands, the World Wildlife Fund (WWF) reports in its 2022 Living Planet Index a 69 percent decrease in monitored populations since 1970, a mere half century.  Their data analyzed 32,000 species.

As the apex species, such a loss forces humans to assume responsibility.  It rests on each and everyone of us from individuals to governments to corporate entities, and across the spectrum of human activity.

The treaty furnishes legal tools to assist in creating protected areas for marine life; it also requires environmental assessments for intended commercial activity … like deep sea mining for example.  The nearly 200 countries involved also signed a pledge to share ocean resources.  All in all, it has been a triumph of common sense over the individual greed of people and nations.

So it is that the treaty has made possible the 30×30 target, namely, to  protect 30 percent of oceans by 2030.  Now comes the hard work of organizing the protection.  Who will police the areas?  Who will pay for it?

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Environmental Crisis in South Asian Countries

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During thetwenty-first century, South Asian countries have been facing and dealing with enormous problems. But the environmental crisis is one of the major and most emerging issues. South Asia is the southern part of the continent Asia, which is also known as the Asian societies. Mainly consist of eight countries India, Pakistan, Afghanistan, Bhutan, Maldives, Nepal, Sir Lanka, and Bangladesh. Most of the environmental problem has been started after the 1960s due to high economic activities, population growth, industrialization, urbanization, and poverty. The combined effects of all these factors caused the situation more complex because of less management of negative and deviant behavior in economic activities. South Asian countries are the developing region that mainly constitutes middle-income countries struggling to flourish their economies and to cope with challenges of political and environmental sustainability, although they are still yet facing many environmental crises which are highly interactive, interlinked with human activities and also human life which it is the need of the hour to be addressed.

Population Density and Population Pressure

Population growth is one of the major elements which play an important role in environmental crises. As all the South Asian developing countries have an extensive density of populations such as India which considers the world second most populated country after China, because the growing population in all South Asian countries, it’s put tremendous population strain on natural and environmental resources such as increase the extraction of resources from the environment influence negatively in our environment.  The   Intergovernmental Panel Discussion (IPCC) on climate change says that most of the environmental crises are attributed to human activities. The population of Pakistan is also increasing at the rate of 1.9 % annual changes and the population of other South Asian countries is also not up to the mark, but increasing day by day which adversely affects the economy and the natural setting of the environment.

Climate Change

Climate change is also a major problem. South Asian developing counties are vulnerable to climate change-related disasters. The history of Pakistan, and Bangladesh showed how much they suffered due to climate flood disasters. Pakistan and India are facing the brunt of extreme weather almost every year. Being affected by environmental problems severely influence economic activities in the summer of 2022 due to “Heat Waves” in India and Pakistan, “Flood Crisis” in Pakistan last year affected the largest region about one–third of the whole country. Melting glaciers in Pakistan, almost twenty glacier bodies in Nepal, and twenty-five in Bhutan are so unsafe glacial water bodies. Land erosion in India, and Nepal land erosion, and land sliding. With rising sea levels in Bangladesh, Maldives, and Pakistan it is expected that by 2050 most of them swallowed by the sea. This climate condition is not new for this region, according to the World Bank Report 750 million people across South Asian societies are impacted by the last almost 20 years. In Afghanistan, farmers face climate-induced drought, and nearly 19 million Afghans are unable to feed themselves and almost 5 million people across India and Bangladesh. According to the climate change risk index Bangladesh and Pakistan ranked sixth and seventh while India ranked fourth among them respectively. A recent report of intergovernmental on climate change called “Code Red for Humanity” by UN Secretary-General Antonio Guterres, it is predicted that in the next two decades, global warming will increase up to 1.5 degrees Celsius.

Pollution

Almost all Asian societies adversely face the problem of pollution associated with indoor and outdoor elements which may be the source of pollution. With the increase of demographic pressure and urbanization, pollution is also considered a vital concern in South Asian countries. Due to industrialization, transportation, burning of coal, and biomass, excessive use of metals, and soil depletion of natural resources and minerals merely falls under the category of pollution. According to the report of the Air Quality Life Index Pakistan is the fourth most pollution-causing country in the world and India is the second most polluted country in the world and number one in Bangladesh. Excess methane, carbon dioxide, nitrogen, sulfur, and insoluble and soluble materials emitted by vehicles and industries are harmful effects on humans such as lung cancer, asthma, and water-borne diseases. It badly influences plants and animals.

Water scarcity

Water scarcity is a major concern in almost every region. South Asian countries have become water-default regions due to population exploitation, and unplanned urbanization. Almost 90- 95 of water is consumed by agriculture and industries, and there is insufficient storage and a wasteful irrigation method. Per capita, water availability is less than the world average and 4.5% of freshwater resources availability. Pakistan, India, and Afghanistan face varying degrees of water scarcity. Groundwater depletion caused by irrigation, agriculture runoff, industries, and the unregulated release of sewage needs a major concern. Along with scarcity of water quality and quantity, both are also affected by the reduction in the quantity of water because of the recession of glaciers and disruption in the monsoon.

Global warming

Furthermore, global warming is also a main issue that is observed globally it is specifically due to human activities primarily the burning of fossil fuels such as coal, and petroleum, fire burning, and along with the emission of harmful gases. South Asian countries are the major source of carbon dioxide, so it is a crucial component in global warming. However many South Asian countries implement a tax on the use of carbon-related components, a form of small fiscal policy to reduce the concentration of carbon in the atmosphere.

Energy Crisis

In addition to all these South Asia approximately uses only 5.9 % of global energy resources excluding the non- commercial energy resources. South Asian counties have increased the demand for energy in the last few decades, increasing demand by up to 50% since 2000. The rising energy demand is induced by population growth and the manufacturing sector. All the south Asian countries have increased the demand for electricity on average by more than five percent annually over the past two decades and are expected for the future that requires more than double by 2050. More than two third of the energy is imported. So it put pressure to increase cost recovery if the demand increase. In South Asia, disruptions due to conflict among other countries adversely impact fuel imports and put greater pressure on the government to ensure the security of their energy supply.

Conclusion

South Asian countries are major part and contributors to the world economy. Due to the crisis, economic activities were destroyed and diminished in many regions, because of damage to productivity and infrastructure, security threats, and mass migration, as the results growth rate declined and the world economy gets affected. Globally, all the economies of the world somehow depend upon each other for trade. To facilitate this connection it is necessary to maintain a balance. There are many organizations are working in South Asian countries to control the environmental crisis, such as the intergovernmental organization of South Asia Co-operative Environment Program (SACEP). Climate Action Network of South Asia, South Asian form for the environment. So the main purpose of all these organizations is to provide support, protection, and management in context to contribute in terms of sustainable development, along with issues of economic and social development. In addition to all these, urgent action is needed to curb all the challenges. The most immediate and pragmatic step to cope with the challenges is to make a collective UN committee for collaboration among the countries, reduce the global emission of harmful gases, decarbonize the energy sector, educate people to spread awareness among people start campaigns related to the protection of environmental at county level, uses of renewable resources, new policy initiation, formulation, and Implementation.

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Green Planet

The Old Earth and Earthquakes in 2023: Accounting the Damage

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The search for survivors continues in Samada, Syria following the February 6 earthquake . © UNOCHA/Ali Haj Suleiman

Gaiya’s hypothesis points to the earth as a living. The elements that support human life on earth, starting with the lithosphere and ending with hydrogen, argue that the earth is also like a living being, it’s just that this hypothesis cannot be scientifically proven. But to say that the earth is old is not only to brag. Just as the human body is aging and experiencing a functional decline, it is most often affected by the disease. The same goes for the earth on which humans live.

It is undeniable that since the beginning of 2023, earthquakes have affected many regions of the earth. In Indonesia, throughout 2023, there have been at least 11 large-scale earthquakes, the last of which occurred in Jayapura with a magnitude of 5.4 on the Richter scale. Meanwhile, at the global level, Turkey and Syria are still struggling to recover from the earthquake that killed as many as 36,000 people on February 14, with estimates of physical damage not yet calculated. Natural disasters like earthquakes, which have become more and more massive in recent times, have, of course, increased self-consciousness in society. Aside from this fear, earthquakes also cause a lot of damage and loss, both on goods and lives. Natural earthquakes are never caused by man. Yet humans can still learn this. In 2023, seismic registers will be completed with the results of the earth’s natural activity.

The reason that the land is old may always be a valid argument today. This old earth makes the tectonic forces that exist below the Earth’s surface stronger. These tectonic forces can set off earthquakes when the plates of the earth cooled.

The causes and effects of the earthquake

Small-scale earthquakes are not always innocuous, but large-scale earthquakes are certainly more dangerous. The structure of the soil and the area of a site influence how earthquakes may damage the site.

Earthquakes are vibrations or shocks which come from inside the earth. The natural cause is the movement of the terrestrial crust. The Earth consists of many different layers, which consist of the heart of the Earth (liquid or solid), the mantle, the Earth’s crust, and the lithosphere. Each layer has different properties and features. The lithosphere is the outermost layer and is made up of tectonic plates that come and go. When tectonic plaques move, they cause earthquakes. Earthquakes can also happen due to volcanic activity, where magma from inside the earth enters the surface.

An earthquake is a natural phenomenon that may cause serious environmental damage. Earthquakes have the potential to cause a variety of impacts, not only damage to physical structures, but also damage to the environment. Earthquakes can cause a variety of negative environmental effects, including pollution and damage to ecosystems.

First, earthquakes have the potential to contaminate the environment. Earthquakes will cause the breakdown of physical structures such as buildings, roads, and bridges, which will cause hazardous materials such as asbestos, chemicals, and waste to spread into the environment and cause environmental pollution. In addition, earthquakes can also lead to dangerous gas leaks, such as poisonous and irritating gases. It can irritate the respiratory tract, nervous system and skin and cause poisoning.

Second, earthquakes can wreak havoc on the ecosystem. Earthquakes can cause turbulence in sea water, which can lead to loss of habitat and even death of marine animals. This can result in the loss of valuable habitats that contain many organisms. What’s more, earthquakes can also cause damage to forests, especially on mountain slopes. Earthquakes have the potential to destroy trees in forests, resulting in the loss of habitat for many wildlife.

Third, earthquakes may cause environmental damage as a result of tsunamis. Tsunamis are large oceanic waves due to earthquakes. Tsunamis can wreak havoc on the environment. Tsunamis can destroy buildings, bridges and roads, resulting in environmental damage. In addition, tsunamis may also cause damage to the ecosystem, such as loss of habitat for birds, fish and other animals.

Fourth, earthquakes can harm the environment because of landslides. A landslide is a natural process in which the ground, rock and other materials are washed away by water or wind. Earthquakes have the potential to cause avalanches and environmental damage. Landslides may flood areas adjacent to the landslide site, resulting in the death of plants and animals in the area. Landslides can also result in the release of hazardous waste into the environment, which can cause further damage to the environment.

Fifth, earthquakes can wreak havoc on the environment. Lahars is a blend of water, rock, earth and other materials from volcanic eruptions. Lahars can cause great environmental damage. Lahars can cause flooding of surrounding areas, which can make the soil infertile and cause habitat loss for wild animals. In addition, lava can also cause the release of hazardous materials into the environment, which can cause greater environmental damage.

The impact of environmental damage due to earthquakes is very dangerous and can cause irreplaceable losses. Environmental damage due to earthquakes can cause habitat losses for animals, infertility in the soil, and environmental pollution. Therefore, it is important to make efforts to prevent and control the impact of environmental damage due to earthquakes. These efforts include raising awareness of the impact of earthquakes, installing earthquake information delivery systems, and developing technology to minimize the impact of environmental damage. This is important to do to reduce the impact of environmental damage due to earthquakes that may occur in the future.

Can Human Manage the Earthquake?

At least very strong earthquakes occurred between the years 1900 and 2000. The largest earthquake of the 20th century, measuring 9.5 on the Richter scale, struck Chile in 1860. Earthquakes increased in frequency after that. Even though earthquakes are more frequent now than they were a century ago, nobody can stop them or come up with any strategies to stop them from happening. All that people can do to reduce losses is make an effort to adjust to earthquake conditions and keep researching earthquake incidents. And the dangers. Seismological experts have frequently offered predictions about earthquakes based on research. It’s only the human habit that’s human nature to reflect and become more watchful after the bad things happened.

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