Fungi In Polar Regions

Fungi that inhabit polar-region can grow and decompose organic compounds under subzero temperatures play important roles in the nutrient cycle of polar-region ecosystems. Thus, changes in the mycoflora affect the ecological recycling in these regions, and understanding the cold-adaptation strategies of fungi under extreme environments is critical for a better understanding of polar-region ecosystems. Due to their ability to survive under extreme environments, fungi in polar-region are seen to show potential for utilization in biotechnologies. This book presents our current understanding of the mycoflora in polar-region and their cold adaptation strategies, and applied studies using their abilities.

Fungi that inhabit polar-region can grow and decompose organic compounds under subzero temperatures play important roles in the nutrient cycle of polar-region ecosystems. Thus, changes in the mycoflora affect the ecological recycling in these regions, and understanding the cold-adaptation strategies of fungi under extreme environments is critical for a better understanding of polar-region ecosystems. Due to their ability to survive under extreme environments, fungi in polar-region are seen to show potential for utilization in biotechnologies. This book presents our current understanding of the mycoflora in polar-region and their cold adaptation strategies, and applied studies using their abilities.

Most of the Earth’s biosphere is characterized by low temperatures. Vast areas (>20%) of the soil ecosystem are permanently frozen or are unfrozen for only a few weeks in summer. Permafrost regions occur at high latitudes and also at high ele- tions; a significant part of the global permafrost area is represented by mountains. Permafrost soils are of global interest, since a significant increase in temperature is predicted for polar regions. Global warming will have a great impact on these soils, especially in northern regions, since they contain large amounts of organic carbon and act as carbon sinks, and a temperature increase will result in a release of carbon into the atmosphere. Additionally, the intensified release of the clima- relevant tracer gas methane represents a potential environmental harzard. Significant numbers of viable microorganisms, including bacteria, archaea, p- totrophic cyanobacteria and green algae, fungi and protozoa, are present in per- frost, and the characteristics of these microorganisms reflect the unique and extreme conditions of the permafrost environment. Remarkably, these microorg- isms have been reported to be metabolically active at subzero temperatures, even down to ?20°C.

This book focuses on the fungi found in one of the most pristine regions on Earth: Antarctica. It discusses the fungal occurrence in all substrates of the region, including soil, seawater, lake and marine sediments, rocks, ice, and snow. It also addresses the impact of climate changes on these organisms, the genomic techniques developed to study them, and how a number of compounds, such as antibiotics and enzymes, produced by the Antarctic fungi can be used in medicine, agriculture and the chemical industry.

Life in Ancient Ice presents an unparalleled overview of current research into microbial life in ancient glacial ice and permafrost. Particulates of fungi, bacteria, pollen grains, protists, and viruses are carried by wind around the globe. When they fall to Earth in polar regions they may be trapped in ice for hundreds of millennia. Some of the many implications sound like science fiction--for example, might melting glaciers release ancient pathogens that yield modern-day pandemics? But rigorous, coordinated research is nascent. This book points the way forward. Based on a National Science Foundation-sponsored symposium organized by the editors in 2001, it comprises twenty chapters by internationally renowned scientists, including Russian experts whose decades of work has been rarely available in English. The book begins by setting forth many protocols that have been used to study microorganisms trapped in ice, discussing their potential sources and presenting evidence for microbial metabolic activity at temperatures below freezing. This is followed by nine chapters describing the fungi, bacteria, and viruses that have been found in permafrost and glacial ice. Later chapters include a look at Antarctica's subglacial Lake Vostok, at a robot that can be lowered into ice to detect microbes, and at the use of icy environments on Earth as model systems for studying similar environments on planets and moons. The editors conclude by reviewing key discoveries and outlining important areas for future research. Originally published in 2005. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

Sheds new light on the microbial ecology and physiology of the Earth’s polar regions. • Examines the microbial investigations during the International Polar Year of 2008 focusing on the Arctic and Antarctic, along with earlier investigations on critical environmental issues such as climate change, ozone depletion, and elemental cycling. • Offers a survey of what is known and unknown about the microbial inhabitants of polar environments, addresses the adaptations and physiology of cold-adapted microorganisms, and explores the ecological role that polar microbial communities play in biogeochemical cycling. • Presents the challenges that polar and subpolar microorganisms face and describes the lowest temperatures in which microbial life can exist—and the prospects for life on other planets. Recommended for a general microbiology audience as well as for scientists and students in all areas of biology and geomicrobiology.

We might slice them into a salad, savor them in a sauce, wonder at their power to intoxicate or poison, marvel at their multifarious presence in the forest--but few of us realize that mushrooms, humbly thriving on decay, are crucial to life on Earth as we know it. In this book a distinguished biologist, long intrigued by the secret life of fungi, reveals the power of these curious organisms--not quite animal, not quite plant--to enchant and instruct, to nourish and make way for all sorts of superior forms of nature. In a style at once learned and quirky, personal and commanding, Elio Schaechter imparts the fascinating minutiae and the weighty implications of his subject--a primarily microscopic life form that nonetheless accounts for up to two tons of matter for every human on the planet. He shows us how fungi, the great decomposers, recycle most of the world's vegetable matter--from a blade of grass to a strapping tree--and thus prevent us from sinking under ever-accumulating masses of decaying matter. With the same expertise and contagious enthusiasm that he brings to the biology of mushrooms, Schaechter conveys the allure of the mushroom hunt. Drawing on his own experience as well as that of seasoned pickers and amateur mycologists, he explains when and where to find mushrooms, how they are cultivated, and how they are used in various cultures. From the delectable to the merely tolerable, from the hallucinogenic to the deadly, a wide variety of mushrooms are covered in this spirited presentation.