Every year shorebirds from North and South the United States migrate millions of miles to spend the summer season within the Arctic. There they feed in coastline marshes and estuaries alongside probably the most efficient and pristine coasts anyplace. With loads to be had nutrition they may be able to reproduce virtually explosively; and as wintry weather ways, they retreat south in addition to their offspring, to come back to the Arctic the next spring. This outstanding trend of flow and job has been the item of extensive research by means of a world group of ornithologists who've spent a decade counting, surveying, and staring at those shorebirds. during this vital artificial paintings, they handle a number of questions on those migratory poultry populations. what number birds occupy Arctic ecosystems every one summer time? How lengthy do vacationing shorebirds linger prior to heading south? How fecund are those birds? the place precisely do they migrate and the place precisely do they go back? Are their populations turning out to be or shrinking? the result of this examine are an important for larger knowing how environmental rules will impact Arctic habitats in addition to the far-ranging wintry weather habitats utilized by migratory shorebirds.
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Additional resources for Arctic Shorebirds in North America: A Decade of Monitoring (Studies in Avian Biology, Volume 44)
In most cases, the density estimates for these species were also within, or at least close to, the range of site-specific density estimates from western Alaska derived for these species from other studies using different methods. Given continental population estimates provided by Morrison et al. 4). For Pacific Golden-Plover, Greater Yellowlegs, and Least Sandpiper, the population estimates for our study areas equaled a large proportion of the Morrison estimate despite our study areas covering only a small proportion of the species’ ranges.
In the tables summarizing our findings across the four study areas, AMSA data are entered into the “moist” category, but this represents a default category only and should not be construed as reflecting actual shorebird habitat preferences in the AMSA. In APSA, six sites were selected between North Becharof Lake and Chignik based on their accessibility by fixed-wing aircraft (Fig. 2). 3. Site and plots (dots) in Yukon Delta study area. randomly selected a total of 51 points within these sites and used each point as the northwest corner for a 16-ha plot.
Black Turnstone Black Turnstones were abundant in the YDSA but rare or absent in the other study areas 28 STUDIES IN AVIAN BIOLOGY NO. , Izembek NWR), they are one of the most abundant tundra-nesting bird species (Gill et al. 2002, K. Sowl, pers. ). 3). Surveyors recorded 32 nests or probable nests and 154 pairs, but single birds were by far the most common type of observation. This species was recorded almost exclusively in wetlands on YDSA, but nearly one-fifth of all observations on the APSA were in uplands.