Population Dynamics of Shorebirds

摘要: In some parts of the world, shorebird populations have been monitored for more than 10 years by counts in their nonbreeding range (Prater, 1982). particular, midwinter over whole western Europe given good indications year-to-year changes several sandpiper (Scolopacidae) species breeding discrete Arctic areas such as Siberia or Greenland. These indicate fluctuations within ± 50% mean, Red Knot Calidris canutus from Greenland/Ellesmere Island, apparently associated with annual variations weather on grounds. Much less is known total populations, these, most plover (Charadrii) species, which are found drier tropical regions. Those waders that restricted to intertidal habitats season provide few examples smaller birds whose regional can be assessed relatively easily and accurately even though they contain many hundreds thousands individuals.