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"Extinct species"
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Planet without apes
A warning that the extinction of the great apes -- chimpanzees, bonobos, gorillas, and orangutans--will become reality within just a few human generations. We are on the verge of losing the last links to our evolutionary past and to all the biological knowledge about ourselves that would die along with them.
Book
Recent responses to climate change reveal the drivers of species extinction and survival
Climate change may be a major threat to biodiversity in the next 100 years. Although there has been important work on mechanisms of decline in some species, it generally remains unclear which changes in climate actually cause extinctions, and how many species will likely be lost. Here, we identify the specific changes in climate that are associated with the widespread local extinctions that have already occurred. We then use this information to predict the extent of future biodiversity loss and to identify which processes may forestall extinction. We used data from surveys of 538 plant and animal species over time, 44% of which have already had local extinctions at one or more sites. We found that locations with local extinctions had larger and faster changes in hottest yearly temperatures than those without. Surprisingly, sites with local extinctions had significantly smaller changes in mean annual temperatures, despite the widespread use of mean annual temperatures as proxies for overall climate change. Based on their past rates of dispersal, we estimate that 57–70% of these 538 species will not disperse quickly enough to avoid extinction. However, we show that niche shifts appear to be far more important for avoiding extinction than dispersal, although most studies focus only on dispersal. Specifically, considering both dispersal and niche shifts, we project that only 16–30% of these 538 species may go extinct by 2070. Overall, our results help identify the specific climatic changes that cause extinction and the processes that may help species to survive.
Journal Article
The naked Neanderthal : a new understanding of the human creature
\"For over a century we saw Neanderthals as inferior to Homo Sapiens. More recently, the pendulum swung the other way and they are generally seen as our relatives: not quite human, but similar enough, and still not equal. Now, thanks to an ongoing revolution in paleoanthropology in which he has played a key part, Ludovic Slimak shows us that they are something altogether different--and they should be understood on their own terms rather than by comparing them to ourselves. As he reveals in this stunning book, the Neanderthals had their own history, their own rituals, their own customs. Their own intelligence, very different from ours.\" -- Provided by publisher.
Book
Contemporaneity of Australopithecus, Paranthropus, and early Homo erectus in South Africa
Fossil hominins from South Africa are enriching the story of early human evolution and dispersal. Herries et al. describe the geological context and dating of the hominin-bearing infilled cave, or palaeocave, at a site called Drimolen in South Africa (see the Perspective by Antón). They focus on the age and context of a recently discovered Homo erectus sensu lato fossil and a Paranthropus robustus fossil, which they dated to ∼2.04 million to 1.95 million years ago. This makes Drimolen one of the best-dated sites in South Africa and establishes these fossils as the oldest definitive specimens of their respective species ever discovered. The age confirms that species of Australopithecus, Paranthropus , and early Homo overlapped in the karst of South Africa ∼2 million years ago. Science , this issue p. eaaw7293 ; see also p. 34 Multiple hominin genera, including the earliest Homo erectus lineage, were present in South Africa 2 million years ago. Understanding the extinction of Australopithecus and origins of Paranthropus and Homo in South Africa has been hampered by the perceived complex geological context of hominin fossils, poor chronological resolution, and a lack of well-preserved early Homo specimens. We describe, date, and contextualize the discovery of two hominin crania from Drimolen Main Quarry in South Africa. At ~2.04 million to 1.95 million years old, DNH 152 represents the earliest definitive occurrence of Paranthropus robustus , and DNH 134 represents the earliest occurrence of a cranium with clear affinities to Homo erectus . These crania also show that Homo , Paranthropus , and Australopithecus were contemporaneous at ~2 million years ago. This high taxonomic diversity is also reflected in non-hominin species and provides evidence of endemic evolution and dispersal during a period of climatic variability.
Journal Article
Lost animals, disappearing worlds : stories of extinction
This text presents thirty-one extinct species through the personal perspectives of those animals. This intimate approach not only highlights each species but explores the broader implications of losing a species forever. How do we honour such a loss? Can we grieve for species we never knew? These animals range from the well-known passenger pigeon, thylacine and great auk, to lesser-known creatures like the Arabian ostrich, Saint Helena earwig and Bramble Cay melomys. These poignant portraits tug on the heartstrings and aim to inspire readers to protect vulnerable and endangered species today, motivating them to play a positive role in conserving our planet's biodiversity.
BOOK
Impact of Conservation on the Status of the World's Vertebrates
Using data for 25,780 species categorized on the International Union for Conservation of Nature Red List, we present an assessment of the status of the world's vertebrates. One-fifth of species are classified as Threatened, and we show that this figure is increasing: On average, 52 species of mammals, birds, and amphibians move one category closer to extinction each year. However, this overall pattern conceals the impact of conservation successes, and we show that the rate of deterioration would have been at least one-fifth again as much in the absence of these. Nonetheless, current conservation efforts remain insufficient to offset the main drivers of biodiversity loss in these groups: agricultural expansion, logging, overexploitation, and invasive alien species.
Journal Article
Endangered and extinct invertebrates
\"Oahu tree snails and pink velvet worms are two examples of endangered invertebrates. Few of them exist in the wild. Other invertebrates have already gone extinct. What hurts these animals? What can you do to help?\"--Page 4 of cover.
Book
How many bird and mammal extinctions has recent conservation action prevented?
Aichi Target 12 of the Convention on Biological Diversity (CBD) contains the aim to ‘prevent extinctions of known threatened species’. To measure the degree to which this was achieved, we used expert elicitation to estimate the number of bird and mammal species whose extinctions were prevented by conservation action in 1993–2020 (the lifetime of the CBD) and 2010–2020 (the timing of Aichi Target 12). We found that conservation action prevented 21–32 bird and 7–16 mammal extinctions since 1993, and 9–18 bird and two to seven mammal extinctions since 2010. Many remain highly threatened and may still become extinct. Considering that 10 bird and five mammal species did go extinct (or are strongly suspected to) since 1993, extinction rates would have been 2.9–4.2 times greater without conservation action. While policy commitments have fostered significant conservation achievements, future biodiversity action needs to be scaled up to avert additional extinctions.
Journal Article
Invasive Plants Have Scale-Dependent Effects on Diversity by Altering Species-Area Relationships
Although invasive plant species often reduce diversity, they rarely cause plant extinctions. We surveyed paired invaded and uninvaded plant communities from three biomes. We reconcile the discrepancy in diversity loss from invaders by showing that invaded communities have lower local richness but steeper species accumulation with area than that of uninvaded communities, leading to proportionately fewer species loss at broader spatial scales. We show that invaders drive scale-dependent biodiversity loss through strong neutral sampling effects on the number of individuals in a community. We also show that nonneutral species extirpations are due to a proportionately larger effect of invaders on common species, suggesting that rare species are buffered against extinction. Our study provides a synthetic perspective on the threat of invasions to biodiversity loss across spatial scales.
Journal Article