Climate Change

Global Eco Watch: Chinese pink dolphin numbers rise in Pearl river estuary

Down To Earth brings you the top happenings in the world of global ecology

By DTE Staff
Published: Saturday 17 October 2020

Chinese pink dolphins are making a comeback in the Pearl river estuary, one of the most heavily industrialised areas on Earth, according to a story by international wire agency, AFP.

The Pearl River estuary includes Hong Kong, Macau as well as the mainland Chinese cities of Shenzhen, Guangzhou and Dongguan. Some 22 million people live in the area.

Pink dolphins have seen a decline in their numbers in the past 15 years by 70-80 per cent. Dolphins use echolocation to find their way in water. The estuary is one of the busiest shipping lanes in the world.

Ships often disturb the dolphins in finding their way and even kill them.

But dolphin numbers in the waters between Hong Kong and Macau have seen a rebound this year because the novel coronavirus disease pandemic has stopped ferries for the time being, according to the AFP report.

The number of pink dolphins in the waters has roughly increased by a third according to scientists quoted in the report.

Utah hiker records encounter with mountain lion in 6-minute video

A 26-year-old hiker in the US state of Utah has recorded a six-minute video of encountering a mountain lion or cougar while hiking in an area called Slate Canyon.

Kyle Burgess recorded the expletive-filled video in which he can be seen stumbling into two puma cubs and is then threatened by their mother, according to a report on CBS news

Burgess can be heard making loud sounds and hissing at the cat as he backs off. After six minutes, he finally flings a stone at the mountain lion following which it goes away.

NASA captures fires across Bolivia


The United States National Aeronautics Space Agency (NASA) has captured fires burning across a vast swathe of Bolivia earlier this month, a statement on the NASA website said.

The Moderate Resolution Imaging Spectroradiometer or MODIS on NASA’s Aqua satellite shot natural-colour photos showing smoke from fires in the Chiquitano forest of eastern Bolivia from October 7-10, 2020. Red dots on the map showed active fire detections.

This year, fires have been burning in the Pantanal, the largest tropical wetland in the world which is located in the eastern part of Bolivia.

Infernos have also been blazing in the dry Chiquitano forest in southeast Bolivia and the Beni savanna and Amazon rainforest areas in the north.

The NASA report attributed the fires to a prolonged drought as well as a recent heat wave that “has turned vegetation to tinder”. The drought has been blamed on warm temperatures in the Atlantic Ocean that have caused moisture to shift to the Northern Hemisphere.

September 2020 was hottest since 1880: NOAA


The September of 2020 was the hottest September since 1880, according to scientists at the United States National Oceanic and Atmospheric Administration or NOAA.

A statement on NOAA’s website also noted that September’s warmth had contributed to 2020 being among the hottest years on record.

The average global temperature in September was 1.75 degrees Fahrenheit (°F) — 0.97 of a degree Celsius (°C) — above the 20th-century average of 59.0 °F (15.0 °C).

This surpasses the average global temperatures for both September 2015 and 2016 by 0.04 of a °F (0.02 of a °C), which previously tied for the hottest Septembers on record.

The 10-warmest Septembers have all occurred since 2005, with the seven-warmest Septembers occurring in the last seven years, the report said.

Nilgiris Elephant Corridor: SC upholds Madras HC order affirming animals’ right of passage


The Supreme Court (SC) October 14, 2020 upheld a 2011 order of the Madras High Court (HC) on the Nilgiris elephant corridor, affirming the right of passage of the animals and the closure of resorts in the area.

The Madras HC had, in July 2011, declared that the Tamil Nadu government was fully empowered under the ‘Project Elephant’ of the Union government as well as Article 51 A (g) of the Constitution to notify the elephant corridor in the state’s Nilgiris district.

The elephant corridor is situated in the Masinagudi area near the Mudumalai National Park in the Nilgris district.

“The Supreme Court Bench of S Abdul Nazeer and Sanjiv Khanna dismissed the special leave petition filed by the Hospitality Association of Mudumalai and Others against the 2011 Judgment of the Madras HC,” Vishal Sinha, an advocate in the case, told Down To Earth.

The court also allowed the formation of a committee led by a retired HC judge and two other persons to hear the individual objections of resort owners and private land owners within the corridor space.

Black pepper may hold the key for Corona fighting drug: Study


A team of Indian scientists has claimed to have identified black pepper, the everyday kitchen spice, as a possible candidate for developing a drug against the novel coronavirus disease.

A computational study conducted by the researchers from the Department of Physics at the Indian Institute of Technology (Indian School of Mines), Dhanbad has found that Piperine found in black pepper, can bind and inhibit the SARS-CoV-2 virus that causes the disease.

Umakanta Tripathy, team leader, said SARS-CoV-2, like any other virus, uses the proteins on its surface to enter into the cells of the human body. He and his team looked for natural compounds that could bind to these proteins and stop the virus from entering human cells.

They used computer-based techniques such as molecular docking and molecular dynamics simulation to hunt for potential inhibitors.

They selected 30 molecules present in common kitchen spices and explored their role as a therapeutic agent. Out of these, Piperine, an alkaloid present in pepper and responsible for its pungency, emerged as a strong deterrent of the virus proteins.

Modulating pathogen functions control sheath blight disease: study


recent study conducted by Indian researchers has discovered that modulating the functions of the pathogen responsible for sheath blight disease could be a game changer in the fight against the menacing rice disease.

Rice is a staple food all over the world and India is the second-largest producer and consumer of rice at the global level. Production of rice in India is limited by several biotic and abiotic factors.

Sheath blight disease caused by a necrotrophic fungal pathogen (Rhizoctonia solani) is a big threat to rice crops. Millions of tonnes of rice are lost due to this disease every year.

The study by the New Delhi-based National Institute of Plant Genome Research (NIPGR) is important towards understanding the sheath blight pathogen. It affects not just rice but also tomatoes and many other crops.

It will also help in developing a strategy to control the disease, say researchers at NIPGR.

“We discovered that silencing of one of the transcription factors ie C2H2 Zn finger transcription factor (RS_CRZ1), significantly compromises the pathogenesis of R. solani in tomato,” Gopaljee Jha, scientist at NIPGR, said.

“The disease was significantly reduced in the RS_CRZ1 silenced plants, compared to the wild type plants. Our data suggests that the RS_CRZ1 enables the pathogen to tackle hostile environment of the host faced during disease establishment process,” Jha added.

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