منابع مشابه
Warming worries for species numbers
Unsurprisingly, humans are increasingly concerned about their possible impact on climate change and its wider effects on the environment. But climate is well known to have varied in the past, so what has been the impact of these variations on the species of the time? Most attempts to look at this issue have focused on relatively short geological periods, limited geographical ranges or few taxon...
متن کاملWarming worries for cod
(Curr. Biol. 16, R474–R475), and from the shift in the chemical equilibria involving the carbonate ion. Wootton's work also highlights the complex dynamics of pH and carbonate changes over time. A lot more research is needed to understand in detail how these changes will play out and how they will interact with wildlife and with the changes in the atmosphere. For instance, it is not at all clea...
متن کاملVagueness by Numbers? No Worries
Take the vague predicate ‘tall’: I claim that any numbers assigned in an attempt to capture the vagueness of ‘tall’ do no more than serve as another measure of height. More generally, in so far as it is possible to assign numbers which respect certain truths about, for example, comparative relations, this is no more than a measure of an attribute related to, or underlying, the vague predicate. ...
متن کاملVagueness by Numbers ? No Worries NICHOLAS
Theories of vagueness based upon fuzzy set theory countenance a continuum of degrees of truth, usually represented by the real numbers between 0 and 1 inclusive (with 0 representing falsity simpliciter and 1 representing truth simpliciter). Keefe (1998) argues against such theories of vagueness. 1 Keefe writes: Take the vague predicate 'tall': I claim that any numbers assigned in an attempt to ...
متن کاملChromosome Numbers for Some Erodium L'Hér (Geraniaceae) Species of Iran
Erodium (Geranaiceae) species are distributed in different habitats of Iran. Some species are of medicinal importance while some are well known weeds. There are no chromosome counts for Erdoium species of Iran. Chromosome numbers are given for six taxa of Erodium (Geraniaceae) from Iran: E. cicutarium (2n=36), E. ciconium(2n=18), E. malacoides (2n=20), E. moschatum (2n=20), E. neuradifolium (2n...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2007
ISSN: 0960-9822
DOI: 10.1016/j.cub.2007.10.049