Penguins preserve records of Antarctic environmental change. The birds’ feathers and eggshells contain the chemical fingerprints of variations in diet, food web structure and even climate, researchers reported February 12 at the American Geophysical Union’s 2018 Ocean Sciences Meeting.
An invasive Australian tree is now posing a serious threat to a global diversity 'hotspot' according to new collaborative research between Landcare Research in New Zealand, the Universities of Cambridge (UK) Denver (US) and Bangor University (UK).
A vast new study of changes in global wildlife over almost three decades has found that low levels of effective national governance are the strongest predictor of declining species numbers -- more so than economic growth, climate change or even surges in human population.
The findings, published in the journal Nature, also show that protected conservation areas do maintain wildlife diversity, but only when situated in countries that are reasonably stable politically with sturdy legal and social structures.
A new study of the world's seven sea turtle species provides evidence that their numbers are growing overall (unlike many endangered vertebrates), thanks to years of conservation efforts that have played a key role in sea turtle recovery -- even for small sea turtle populations. Sea turtles have historically suffered population declines for reasons that include accidental catch and harvesting adults and eggs.
Like old-growth trees in a forest, old fish in the ocean play important roles in the diversity and stability of marine ecosystems. Critically, the longer a fish is allowed to live, the more likely it is to successfully reproduce over the course of its lifetime, which is particularly important in variable environmental conditions.
A team at British Antarctic Survey (BAS) examined the potential distribution of over 900 species of shelf-dwelling marine invertebrates under a warming scenario produced by computer models. They conclude that, while some species in some areas will benefit, 79% of the species native to the region will lose out. This has important implications for future resource management in the region.
Climate change and habitat conversion to agriculture are working together to homogenize nature, indicates a study in the journal Global Change Biology led by the University of California, Davis.
In other words, the more things change, the more they are the same.
While the individual impacts of climate change and habitat conversion on wildlife are well-recognized, little is known about how species respond to both stressors at once.
What is Biodiversity?
Biodiversity is fundamental as it ensures natural sustainability of all life on earth not only for the current population but also for the future generations. However, biodiversity continues to be threatened and in consequence, it affects the survival of humans. Various concerns have been raised by environmental advocates and agencies such as the UNEP, WWF, GreenFacts Foundation, and EPA with regards to the threats posed on many of the world’s ecosystems which are increasingly deteriorating in state by becoming unhealthy and unbalanced.
What is a Biodiversity Hotspot?
Biodiversity hotspots are regions that are both biologically fertile (rich distribution of plants and animals) and highly threatened. In other words, such biogeographic regions are very productive and are constantly exposed to threats of destruction which warrant the need for them to be protected. Examples of biodiversity hotspots are forest habitats as they constantly face destruction and degradation due to illegal logging, pollution and deforestation.
An international team of scientists has issued a warning that biodiversity is dropping below safe levels for the support and wellbeing of human societies.
As a species we are inextricably connected with the processes of our local ecosystems, such as crop pollination, waste decomposition and regulation of the carbon cycle.
These ecosystems depend on the biological diversity within them to function.
The planetary boundaries framework updated in 2015 states that losing more than 10% of the biodiversity in an area places the local ecosystem at risk.