Polar Microbes and Climate Change

Beschreibung

Many current extremophile studies have been undertaken on species suited to extreme temperatures. In contrast, thermophiles (hot temperature-loving microbes) have received far more attention than psychrophiles (cold-loving microbes). On the other hand, scientific research on cold-adapted microbes (precisely polar microbes) has surged by a factor of ten in the last decades. Regarding the size of cold habitats, psychrophiles, or cold-loving creatures, thermophiles should outnumber thermophiles because a considerable percentage of the Earth's biosphere never sees temperatures beyond 5°C. Oceans span over three-quarters of the planet, with deep water masses between 2 and 4°C regardless of latitude. In addition to providing a constantly frigid terrestrial habitat, Antarctica also provides an aquatic niche in the surrounding ice that melts throughout the summer. Examples of cold ecosystems include permafrost soils, high alpine soils, cold deserts, cold caverns, marine sediments, snow, glaciers, and sea ice. This book discusses the different aspects of microbial diversity and their adaptations to extreme polar regions, with a view to their biotechnological exploitation for future research. The chapters cover the complete atlas of up-to-date information. The contents offer molecular diversity and molecular and genetic adaptations of polar inhabitant microbes with a focus on low-temperature-adapted microorganisms. It describes representative groups, the habitats in which they live, and the strategies they employ to cope with the cold. The book will be of interest to all scientists interested in how life copes in deep freezers. It is warranted to mention that for survival in frigid environments and climate change, these organisms have established specific regulatory mechanisms to overcome environmental cues. Over the last decade, remarkable progress has been made to uncover microbial adaptation to anthropogenic activities such as high irradiance, nutritional deprivation, UV-B radiation, heat, cold, desiccation, heavy metals, and radiation. However, studies have opened the doors for a basic understanding of gene regulatory pathways for morphological, physiological, metabolic, and genetic adaptations to various environmental stresses. Unfortunately, the polar regions' adaptation mechanisms and molecular diversity are primarily unexplored. Even research is scattered for a long time, and researchers are looking for a common platform to have a complete snapshot in one place. Hence, the present book content has been designed to discuss the different aspects of microbial diversity and their adaptations to extreme polar regions for their biotechnological exploitation for future research. In addition, chapters have been designed to deal with the complete atlas of up-to-date information. Hence, the book will offer molecular diversity and molecular and genetic adaptations of polar inhabitant microbes.  The book will focus on low-temperature-adapted microorganisms. With cutting-edge knowledge, it will describe representative groups, the habitats in which they live, and the strategies they employ to cope with the cold. Furthermore, the book will offer valuable information to all those scientists interested in knowing how life manages in deep freezers.

Recent studies on extremophiles have focused on thermophiles, microbes that thrive in high temperatures, while psychrophiles, which prefer cold environments, have received less attention. However, interest in cold-adapted microbes, especially those in polar regions, has increased significantly in recent decades. Given that much of Earth’s biosphere remains below 5°C, psychrophiles likely outnumber thermophiles. Oceans, covering over 75% of the planet, maintain deep water temperatures between 2–4°C. Antarctica offers both terrestrial and aquatic cold habitats, including ice that melts seasonally. Other cold ecosystems include permafrost, alpine soils, cold deserts, marine sediments, glaciers, and sea ice.

This book explores microbial diversity and adaptation in extreme polar environments, emphasizing their potential for biotechnological applications. It presents a comprehensive overview of molecular diversity and genetic adaptations in cold-loving microorganisms. The chapters detail representative microbial groups, their habitats, and survival strategies in frigid conditions. It is designed for scientists interested in how life persists in extreme cold.

To survive in such harsh climates, polar microbes have evolved specific regulatory mechanisms to respond to environmental stressors. Over the past decade, research has uncovered microbial responses to anthropogenic challenges like UV-B radiation, nutrient scarcity, desiccation, heavy metals, and temperature extremes. These studies have provided the basis for understanding gene regulatory pathways involved in morphological, physiological, and metabolic adaptations.

Despite advances, the molecular diversity and adaptation mechanisms of polar microbes remain poorly studied. Research is dispersed, and there is a need for a unified resource. This book aims to fill that gap by offering a complete, up-to-date atlas of microbial life in polar regions, highlighting their unique adaptations and potential for future scientific and industrial exploration.

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Alysson Wagner Fernandes Duarte

Themen in »Polar Microbes and Climate Change«

Biotechnology Bioinformatics Cold/Polar Adaptation Diversity Extremophiles Evolution Extreme Environment Genomics Microorganisms Molecular Biology Polar adapted microbial lifestyle Polar Ecosystem Phylogeny Polar Research Proteomics

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