ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    How many birds are there? (1997)
    Springer
    Biodiversity and conservation 6 (1997), S. 615-625 
    Details
    ISSN: 1572-9710
    Keywords: biodiversity ; birds ; populations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Attempts to assess the magnitude of global biodiversity have focused on estimating species richness. However, this is but one component of biodiversity, and others, such as numbers of individuals or biomass, are at least as poorly known and just as important to quantify. Here, we use a variety of methods to estimate the global number of individuals for a single taxon, birds. The different methods yield surprisingly consistent estimates of a global bird population of between 200 billion and 400 billion individuals (1 billion=109). We discuss some of the implications of this figure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018341530497
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Evolutionary age and risk of extinction in the global avifauna (1997)
    Springer
    Evolutionary ecology 11 (1997), S. 557-565 
    Details
    ISSN: 1573-8477
    Keywords: birds ; extinction risk ; population size ; range size ; taxon age
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Species at high risk of extinction are not distributed at random among higher taxa. Here we demonstrate that there is a positive relationship between the proportion of species in a taxon which are considered to be threatened and the evolutionary age of that taxon, both for the global avifauna and the avifauna of the New World. The potential mechanisms and consequences of the relationship are examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10682-997-1511-4
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...