The Supplementary material with bird lists is available here:
http://www.pnas.org/content/suppl/2014/02/13/1318190111.DCSupplemental/pnas.201318190SI.pdf
Most of the species are resident/sedentary birds with small territories - some
of the frugivores and nectarivores/raptors are capable of moving widely.
Seasonality - the study area is very close to the Equator (4-6 degrees South),
I suspect that there is zero seasonal climate diffs (ie no season/aseasonal)
and very limited rainfall seasonality (ie everwet, or close to).
> Date: Sat, 22 Mar 2014 18:55:03 +1100
> From:
> To:
> CC:
> Subject: Re: [Birding-Aus] Rapid upslope shifts in New Guinean birds
> illustrate strong distributional responses of tropical montane species to
> global warming
>
>
>
>
> The study does not appear to consider seasonal changes that are more
> likely than small distribution movements due to climate shifts.
>
>
>
> colin trainor wrote:
>
> >An interesting recent study that re-samples sites first surveyed by Jared
> >Diamond 40+yrs ago.... to look at changes in elevation use by montane birds
> >in New Guinea region..
> >
> >Colin
> >
> >
> >http://www.pnas.org/content/early/2014/02/13/1318190111.abstract
> >
> >Abstract
> >Temperate-zone species have responded to warming temperatures by
> >shifting their distributions poleward and upslope. Thermal
> > tolerance data suggests that tropical
> >species may respond to warming temperatures even more strongly than
> >temperate-zone species,
> > but this prediction has yet to be tested.
> >We addressed this data gap by conducting resurveys to measure
> >distributional responses
> > to temperature increases in the
> >elevational limits of the avifaunas of two geographically and faunally
> >independent New Guinean
> > mountains, Mt. Karimui and Karkar Island,
> >47 and 44 y after they were originally surveyed. Although species
> >richness is roughly
> > five times greater on mainland Mt. Karimui
> > than oceanic Karkar Island, distributional shifts at both sites were
> >similar: upslope
> > shifts averaged 113 m (Mt. Karimui) and
> >152 m (Karkar Island) for upper limits and 95 m (Mt. Karimui) and 123 m
> >(Karkar Island)
> > for lower limits. We incorporated these
> >results into a metaanalysis to compare distributional responses of
> >tropical species
> > with those of temperate-zone species,
> >finding that average upslope shifts in tropical montane species match
> >local temperature
> > increases significantly more closely than
> >in temperate-zone montane species. That tropical species appear to be
> >strong responders
> > has global conservation implications and
> >provides empirical support to hitherto untested models that predict
> >widespread extinctions
> > in upper-elevation tropical endemics with
> >small ranges.
> >
> >
> >_______________________________________________
> >Birding-Aus mailing list
> >
> >To change settings or unsubscribe visit:
> >http://birding-aus.org/mailman/listinfo/birding-aus_birding-aus.org
> >
> >
> >
_______________________________________________
Birding-Aus mailing list
To change settings or unsubscribe visit:
http://birding-aus.org/mailman/listinfo/birding-aus_birding-aus.org
|
