A tenth of the world's wilderness has vanished in the past two decades, research shows. New maps show "alarming losses" of pristine landscapes, particularly in South America and Africa, according to World Conservation Society scientists. They argue in Current Biology that wild areas are ignored in international conservation agreements, despite their ecological and cultural value.

About 20% of the world's land area is classed as wilderness. By this, scientists mean landscapes free of large-scale human disturbances such as housing, development and industry. The majority of these untouched spaces are found in North America, north Asia, north Africa and Australia. They are often home to indigenous peoples as well as endangered plants and animals.

James Watson of the University of Queensland, Australia, and the US Wildlife Conservation Society in New York said wilderness areas "are completely ignored in environmental policy". "International policy mechanisms must recognise the actions needed to maintain wilderness areas before it is too late," said Prof Watson. "We probably have one to two decades to turn this around."

Five of the Solomon Islands have submerged underwater and six more have experienced a dramatic reduction in shoreline due to man-made climate change, according to a paperpublished in the journal Environmental Research Letters.

The Solomon Islands, a sovereign country consisting of a network of picturesque, tropical islands located in the Pacific Ocean, has a population of a little more than 500,000 people, according to census data published in 2009, many of whom have been adversely affected by rising sea levels in recent years.

Ten houses from one island were washed away at sea between 2011 and 2014, according to the study, which asserts that the rising sea levels affecting the Solomon Islands are caused by the warming of the planet.

The research, which was conducted by Australian scientists, bears implications that are likely to reverberate far beyond the turquoise shores of Oceania.

The Earth  is entering a new extinction phase

   Climate change and deforestation are among the reasons we may be facing an extinction event

The global demand for rubber tyres is threatening protected forests in Southeast Asia, according to a study. Tropical forests are being cleared for rubber plantations, putting endangered birds, bats and primates at risk, say UK researchers. By 2024, up to 8.5 million hectares of new rubber plantations will be needed to meet demand, they report in Conservation Letters. This could have a "catastrophic" impact on wildlife, they warn. Species such as the endangered white-shouldered ibis, yellow-cheeked crested gibbon and clouded leopard could lose precious habitat, said the team led by Eleanor Warren-Thomas, from the School of Environmental Sciences at the University of East Anglia. Also, the banteng, which is found in the forests of Cambodia. There's a lot we can do as scientists and the public to make rubber production more wildlife-friendly. "The tyre industry consumes 70% of all natural rubber grown, and rising demand for vehicle and aeroplane tyres is behind the recent expansion of plantations. But the impact of this is a loss of tropical biodiversity," she said. "We predict that between 4.3 and 8.5 million hectares of new plantations will be required to meet projected demand by 2024. This will threaten significant areas of Asian forest, including many protected areas." Eight-point-five million hectares is about the size of the land area of Austria. Biodiversity concern Rubber is the most rapidly expanding tree crop within mainland Southeast Asia.

The 100 most distinct and rare birds Philippine's eagle: The Philippine's eagle is at number eight The world's 100 most distinctive and endangered birds have been determined. Scientists in the UK and US chose the birds based on their rarity, but also how distinctive their appearance, behaviour and evolutionary history was. The list of birds contains several of the world's largest and most striking, as well as other unusual species threatened with extinction. Included are the tooth-billed pigeon, known as the little dodo, the Philippine's eagle and a type of kiwi. Scientists at the Zoological Society of London (ZSL), UK and Yale University in New Haven, Connecticut, US created the list as part of the EDGE of Existence programme, which seeks to document the most uniquely vulnerable species on the planet. Details of the exercise are published in the journal Current Biology. Giant ibis. The giant ibis stands tall at the top of the list At number one is a bird called the giant ibis. The largest member of the ibis and spoonbill family, the giant ibis stands over a metre tall, weighs 4.2kg and is the national bird of Cambodia. Despite this, fewer than 230 pairs remain. As well as being more distantly related to other members of its family, the giant ibis is expected to further decline in numbers due to habitat destruction and the predation of its eggs by mammals.