Abstract:
:Estimates of recent biodiversity change remain inconsistent, debated, and infrequently assessed for their functional implications. Here, we report that spatial scale and type of biodiversity measurement influence evidence of temporal biodiversity change. We show a pervasive scale dependence of temporal trends in taxonomic (TD) and functional (FD) diversity for an ~50-year record of avian assemblages from North American Breeding Bird Survey and a record of global extinctions. Average TD and FD increased at all but the global scale. Change in TD exceeded change in FD toward large scales, signaling functional resilience. Assemblage temporal dissimilarity and turnover (replacement of species or functions) declined, while nestedness (tendency of assemblages to be subsets of one another) increased with scale. Patterns of FD change varied strongly among diet and foraging guilds. We suggest that monitoring, policy, and conservation require a scale-explicit framework to account for the pervasive effect that scale has on perceived biodiversity change.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Jarzyna MA,Jetz Wdoi
10.1038/s41467-018-04889-zsubject
Has Abstractpub_date
2018-07-02 00:00:00pages
2565issue
1issn
2041-1723pii
10.1038/s41467-018-04889-zjournal_volume
9pub_type
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