منابع مشابه
Ecology of the rare microbial biosphere of the Arctic Ocean.
Understanding the role of microbes in the oceans has focused on taxa that occur in high abundance; yet most of the marine microbial diversity is largely determined by a long tail of low-abundance taxa. This rare biosphere may have a cosmopolitan distribution because of high dispersal and low loss rates, and possibly represents a source of phylotypes that become abundant when environmental condi...
متن کاملClimate change and the ecology and evolution of Arctic vertebrates.
Climate change is taking place more rapidly and severely in the Arctic than anywhere on the globe, exposing Arctic vertebrates to a host of impacts. Changes in the cryosphere dominate the physical changes that already affect these animals, but increasing air temperatures, changes in precipitation, and ocean acidification will also affect Arctic ecosystems in the future. Adaptation via natural s...
متن کاملCommunity Ecology: How Green Is the Arctic Tundra?
The exploitation ecosystems hypothesis suggests that food chain length increases along gradients of increasing primary productivity. Recent results provide compelling new evidence for this from an arctic-alpine ecosystem.
متن کاملAnimals of the Arctic: The Ecology of the Far North
Rarely can a popularly oriented scientific text be described as accurate and beautiful: Dr. Stonelhouse's book is such a rarity. In the strict sense, this is not a text, for it does not catalog and describe in concise paragraphs each species and variant of flora and fauna existing in the Arctic and sub-Arctic areas; instead, it uses over 200 beautifully reproduced photograplhs to supplement the...
متن کاملECOLOGY AND WILDLIFE: Climate Change and the Arctic Diet
Each spring, female polar bears and their cubs emerge from hibernation after months without food, and their survival depends on having good sea ice for hunting seals, their almost exclusive food. Also in spring, the Arctic sea ice begins to melt and break apart. Over the past 25 years, the timing of this melting has become less predictable as a consequence of warming in the Arctic, varying by m...
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ژورنال
عنوان ژورنال: Nature
سال: 1972
ISSN: 0028-0836,1476-4687
DOI: 10.1038/236041b0