Truede arter og artsudryddelse

Sig hej til HEJ! HEJ! er en smukt illustreret børnebog for de 2- til 5-årige, fuld af skønne dyr og sjove rim. En stor bog til de små om forskelle, ligheder og fællesskab – og et finurligt indblik i den mageløse og mangfoldige dyreverden. Og så er der vigtig pointe med det hele. For mange af dyrene er ved at forsvinde, og det er med at møde dem nu og forstå deres store betydning for kloden, hvis vi skal nå at handle og gøre noget.

En skelsættende og central bog om verdens fremtid og masseudryddelsen af planetens artsrigdom, der udspiller sig for øjnene af os. I løbet af den sidste halve milliard år har der været fem masseudryddelser, hvor mangfoldigheden af liv på jorden er faldet pludseligt og dramatisk. Forskere verden over registrerer i øjeblikket en sjette udryddelse af arter, der spås til at blive den mest omfattende siden asteroide-nedslaget på Yucatanhalvøen i Mexico for 66 millioner år siden, da dinosaurerne blev udslettet. Men denne gang kommer katastrofen ikke udefra. Det er os, der skaber den: menneskeheden.I Den sjette masseuddøen formidler videnskabsjournalist og forfatter Elizabeth Kolbert feltarbejdet i biodiversitetens frontlinje, som snesevis af forskere inden for et halvt dusin discipliner har foretaget gennem de seneste årtier. Hun tager almindelige læsere med derud, hvor masseudryddelsen er i fuld gang: til bunden af dybhavet, hvor geologerne studerer borekerner og dokumenterer krisen i oceanerne; til trægrænsen, der klatrer højere og højere op ad Andesbjergene til stor bekymring for botanikerne; til Great Barrier Reef, hvor havbiologerne ser livet rinde ud i korallerne. På levende og øjenåbnende vis introducerer Elizabeth Kolbert også læseren til et dusin utrolige arter, som for nogles vedkommende allerede er væk, mens andre står over for udryddelse og kun holdes i live i unaturlige omgivelser, for eksempel den panamanske gyldne tudse, alkefuglen og sumatranæsehornet.Gennem sine beretninger fra felten leverer Kolbert en bevægende beretning om udryddelsen af arter, der finder sted overalt omkring os, og samtidig undersøger hun artsudryddelsens begrebshistorie, fra pioneren Georges Cuvier i Paris i 1800-tallet og frem til i dag, hvor det snart står klart for enhver, at udryddelsen er et faktum, og at menneskeheden bærer et hovedansvar. Det bliver næppe de syv vidundere, månelandingen og internettet, som vil stå tilbage som menneskehedens verdensarv, men den sjette udryddelse. Som Kolbert skriver, tvinger det os til at genoverveje det grundlæggende spørgsmål om, hvad det vil sige at være menneske.Elizabeth Kolbert vandt en Pulitzer Prize for Den sjette masseuddøen, og den er nr. 1 på The Guardians "100 Best Nonfiction Books of All Time".

Legendary conservationists show us that we still have the power to prevent critical consequences of the sixth extinction in this game-changing book.

Bring home the Photo Ark, by celebrated National Geographic photographer Joel Sartore, with this collectible set of 50 postcards, including some of the most celebrated images taken of our planet's most precious species.Curated from the #1 best-selling The Photo Ark, these 50 iconic portraits highlight the beauty of some of the world’s most endangered species. A powerful collection of Sartore's major initiative and lifelong project to shed light on these invaluable creatures, it will inspire you to save these species for our planet.

The development of plant structures like prickles involves a complex interplay of genetic pathways and regulatory networks. In this book, author used molecular analysis to identify potential gene networks and transcription factors regulating prickle development in Solanum viarum, a prickly plant species.The prickleless mutant was used as a model system to investigate the molecular mechanisms involved in prickle development. RNA sequencing and transcriptomic analysis were used to identify differentially expressed genes in the prickleless mutant compared to wild type plants. Further analysis of these genes revealed potential signaling pathways and genetic pathways involved in prickle development. Proteomic and metabolomic analysis were also used to identify potential protein-protein interactions and secondary metabolic pathways involved in the regulation of prickle development.To reconstruct gene networks involved in prickle development, gene co-expression and clustering analysis were performed, and gene ontology analysis was used to predict protein function. Pathway analysis was performed to identify potential pathways involved in prickle development, and the findings were validated by gene knockouts and other genetic manipulations.This book revealed the prickle development in Solanum viarum is regulated by a complex network of genes and pathways, including those involved in plant morphology, growth, and cell differentiation. Hormonal regulation also played a significant role, with plant hormones like auxin, cytokinin, abscisic acid, gibberellins, ethylene, and jasmonic acid being involved in the regulation of prickle development.Additionally, plant defense and secondary metabolism pathways were identified as playing a role in prickle development. The identification of potential gene networks and regulatory pathways involved in prickle development provides important insights into the molecular mechanisms underlying the development of plant structures; the information in this book could be used to develop new strategies for improving plant growth and development, as well as for crop breeding and genetic engineering.

"The story of one woman's remarkable work with a trio of charismatic, endangered bird species-and her discoveries about the devastating threats that imperil them. In Feather Trails, wildlife biologist and birder Sophie A. H. Osborn reveals how the harmful environmental choices we've made-including pesticide use, the introduction of invasive species, lead poisoning, and habitat destruction-have decimated Peregrine Falcons, Hawaiian Crows, and California Condors. In the Rocky Mountains, the cloud forests of Hawai'i, and the Grand Canyon, Sophie and her colleagues work day-to-day to try to reintroduce these birds to the wild, even when it seems that the odds are steeply stacked against their survival. With humor and suspense, Feather Trails introduces us to the fascinating behaviors and unique personalities of Sophie's avian charges and shows that what endangers them ultimately threatens all life on our planet. More than a deeply researched environmental investigation, Feather Trails is also a personal journey and human story, in which Sophie overcomes her own obstacles-among them heat exhaustion, poachers, rattlesnakes, and chauvinism. Ultimately, Feather Trails is an inspiring, poignant narrative about endangered birds and how our choices can help to ensure a future not only for the rarest species, but for us too"--

Gareth Patterson rediscovered the most southerly elephants in the world, the highly endangered and secretive Knysna elephants of the southern Cape, South Africa. It was during this time that he also made the startling discovery of a being even more mysterious than the Knysna elephants - a relict hominoid known to the Knysna forest people as the 'Otang'.Gareth was at first reluctant to blur the remarkable story of the Knysna elephants with his findings about the otang...That is, until now.The possible existence of relict hominoids is today gaining momentum world-wide with ongoing research into the Sasquatch in North America, the Yeti in the Himalayas, the Yowie in Australia and the Orang Pendek in Sumatra. Eminent conservationists and scientists - among them Dr. Jane Goodall, Dr. George Schaller, Dr. Ian Redmond, Professor Jeff Meldrum and Professor Gregory Forth - have publicly stated that they are open-minded about the possible existence of these cryptid beings. In the course of his unannounced research into the otang Gareth heard many accounts - mostly spontaneous and unprompted - of otang sightings by others in the area over a number of years. These accounts, documented in this book, are astonishingly consistent both in the descriptions of the otang and in the shocked reactions of the individuals who saw them.Gareth Patterson's work supports the increasing realization that humankind still has much to learn about the natural world and the mysteries it holds. The possibility that we may be sharing our world with other as yet unidentified hominoids is today being viewed as something that should not be discounted. And as humankind, we need to reassess our role and responsibility towards all forms of life that coexist with us on planet Earth.Beyond the Secret Elephants continues the story of Patterson's search for and eventual familiarity with the remaining Knysna elephants, while also revealing...the presence of an even more legendary creature, a relict hominoid known to the indigenous people as the otang.Dr. Jeff Meldrum. Professor of Anatomy and Anthropology, Idaho State University ...it is impressive when a renowned field researcher writes a book like Beyond the Secret Elephants - following in the erudite footsteps of the late Lyall Watson... Ian Redmond OBE

The sixth mass extinction or Anthropocene extinction is one of the most pervasive issues of our time. Animals, Plants and Afterimages brings together leading scholars in the humanities and life sciences to explore how extinct species are represented in art and visual culture, with a special emphasis on museums. Engaging with celebrated cases of vanished species such as the quagga and the thylacine as well as less well-known examples of animals and plants, these essays explore how representations of recent and ancient extinctions help advance scientific understanding and speak to contemporary ecological and environmental concerns.

"Conventional wisdom is that wild animals are being wiped out. But conventional wisdom skips some important details. Wildlife is rebounding. Not everywhere. Not every species. But a handful of wildlife populations have reached numbers unimaginable in a century. Red deer in Europe, bison in North America, humpback whales in the Atlantic. They have all seen their populations explode. They are back from the brink, numbering in the tens, or even hundreds, of thousands. Their return thrills those who have rooted for their recovery. It terrifies those who grew comfortable without them. This book tracks-and tries to understand-these dramatic rebounds. It shines a light on species returning to forests and farms, prairies and oceans, rivers and cities. It asks how these transformations can be happening and what they have to teach"--

Africa's surviving rhinos are seriously threatened. This timely book considers all kinds of human interactions with these magnificent and enigmatic animals, offering a significant contribution to our understanding of wildlife in the African continent.

"From the most unforgiving of concrete jungles to the pastoral reaches of the countryside, birds are among the most plentiful and plainly visible animals on the planet. For millions of years, they have survived in every known biome, carving out ecological niches for themselves and their offspring and often thriving. But this remarkable adaptability can only go so far. With the recent acceleration of habitat loss, climate change, spread of invasive species, and other detrimental environmental developments, birds are disappearing across the world. Yet despite such wide-ranging decimation, birdwatching remains one of the fastest growing hobbies in the United States. Endangered and Disappearing Birds of Appalachia and the Southeast, by award-winning author and photographer Matt Williams, is an essential guide for the bird-curious in the Appalachian and southeastern regions of the United States. Combining brilliant photography with taxonomic classification, identification tips, and other information, the book goes beyond the scope of a traditional field guide. Each profile includes descriptions of current species-conservation efforts, as well as tips on how to get involved in the ongoing work to save these endangered creatures. This carefully compiled guide offers a detailed introduction to the birds that most need our help and to the steps we can all take to protect their future"--

"The great auk is one of the most tragic and documented examples of extinction. A flightless bird that bred primarily on the remote islands of the North Atlantic, the last of its kind were killed in Iceland in 1844. Gâisli Pâalsson draws on firsthand accounts from the Icelanders who hunted the last great auks to bring to life a bygone age of Victorian scientific exploration while offering vital insights into the extinction of species."--

Ce livre de coloriage pour adultes est une collection de 40 illustrations d'animaux magnifiquement dessinées, chacun décoré avec des motifs de fleurs et de feuilles. Ce livre est conçu pour aider les adultes à se détendre et à réduire le stress grâce à l'art thérapie. Chaque animal est représenté de manière détaillée, avec des détails tels que des plumes, des poils, des écailles ou des cornes, ajoutant une touche de réalisme à chaque page. Les fleurs et les feuilles qui les entourent sont également très détaillées, offrant une grande variété de formes et de couleurs pour colorier et personnaliser. Que vous soyez un artiste chevronné ou simplement en quête d'une activité relaxante, "Animaux à fleurs" est le livre de coloriage parfait pour stimuler votre créativité tout en vous offrant un moment de détente.

Join Hamish The Eco Ninja on his second adventure as he learns all about bees and just how important they are for our planet. This is a story for younger readers that also contains up to date, highly factual information on bees.

This is the story of the last two northern white rhinos, Najin and Fatu, as the species has fallen victim to poaching, wars, climate change, and Asian economic boom to become functionally extinct, as well as the story of the scientists and conservationists around the world fighting to save the species through scientific innovation.

A comprehensive history that covers all aspects of America's most important and controversial environmental law. It describes the history of extinction, the creation of ESA, subsequent legislative, judicial, and political events, and contemporary challenges and opportunities for wildlife conservation.

Global warming and its effects on polar bears. Attack by 52 polar bears on the settlement of Novaya Zemlya, of Belushya Guba.