Distribution and abundance of nesting common and Caspian terns on the North American Great Lakes, 1976 to 1999

Morris, Ralph D.; Weseloh, D. V.; Cuthbert, Francesca J.; Pekarik, Cynthia; Wires, Linda R.; Harper, Lee H.

doi:10.1016/j.jglr.2009.09.008

Cited by 17 publications

(10 citation statements)

References 41 publications

(53 reference statements)

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“…It is unknown whether this is an original expansion or the species historically bred further north in the Boreal Shield prior to the population declines of the mid-20th century (Doucette et al 2010). Lake Winnipegosis has one of the largest breeding concentrations of Double-crested Cormorants in North America, with 35 181 and 36 497 pairs in 1987and 1999, respectively (Hobson et al 1987Koonz 2000). Numbers appear to have declined since, with only 20 149 pairs observed in 2012 (Wilson et al, unpublished manuscript).…”

Section: Discussionmentioning

confidence: 99%

“…From the 1960s through the 1980s, several studies reported on the abundance and distribution of colonial waterbirds on lakes Winnipeg, Winnipegosis, and Manitoba, south of the 54th parallel (Vermeer 1969(Vermeer , 1970Koonz and Rakowski 1985;Hobson et al 1989). No region-wide monitoring has taken place in central and southern Manitoba in over two decades despite observed declines in the populations of some colonial species further east on the Great Lakes (Morris et al 2010(Morris et al , 2011) and a number of regional threats to waterbirds, including persecution, flooding of colonies due to water level manipulation, and eutrophication of the lakes, which may subsequently impact breeding waterbirds (Hobson et al 1989;Lindenschmidt et al 2012;Schindler et al 2012).…”

Section: Introductionmentioning

confidence: 99%

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Abundance, distribution, and species assemblages of colonial waterbirds in the boreal region of west-central Manitoba and east-central Saskatchewan

Wilson

2013

Can Field Nat

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Central and southern Manitoba contain some of the largest breeding populations of several colonial waterbird species in North America. Despite the value of this region for waterbirds, very little monitoring has been conducted on Lake Winnipeg, Lake Winnipegosis, or Lake Manitoba in the past three decades and little is known about the smaller boreal lakes in adjacent areas to the north. In June 2011, boat surveys were conducted on 11 boreal lakes in west-central Manitoba and east-central Saskatchewan to examine current abundance and distribution of colonial waterbirds in that region. Data from this survey were compared with abundance of colonial waterbirds on Lake Winnipegosis and Lake Manitoba from an aerial survey of these lakes in 2012. Waterbird colonies were located on 7 of the 11 lakes in 2011 and included Double-crested Cormorants (Phalacrocorax auritus) (2373 adults, 1134 pairs in 7 colonies), Common Terns (Sterna hirundo) (1367 adults, 772 pairs in 29 colonies), Forster’s Terns (Sterna forsteri) (20 adults, 11 pairs in 1 colony), Herring Gulls (Larus argentatus) (876 adults, 568 pairs in 23 colonies), and Ring-billed Gulls (Larus delawarensis) (3752 adults, 16 colonies). Common Terns and Herring Gulls appeared to be predominantly breeders and pair abundance for both species increased in a sigmoidal fashion; lakes <100 km2 in area had few breeding pairs. Numbers of Double-crested Cormorants and especially, Ring-billed Gulls, may have included a sizeable non-breeding component. Densities (pairs/lake area) of Common Terns and Herring Gulls were about 2 and 4 times higher, respectively, on these lakes than on Lake Winnipegosis and Lake Manitoba, while Double-crested Cormorant and Ring-billed Gull densities were higher on lakes Winnipegosis and Manitoba. Additional studies of productivity in relation to lake characteristics and connectivity among colonies throughout the region would further our understanding of the importance and sustainability of waterbird populations in this region of the boreal forest.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Abundance, distribution, and species assemblages of colonial waterbirds in the boreal region of west-central Manitoba and east-central Saskatchewan

Wilson

2013

Can Field Nat

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“…Recommendations are: (1) annual management be implemented where feasible at Common Tern nesting sites on the Great Lakes identified as "high priority" (see Morris et al 2010), (2) systematic census of major water bodies in Manitoba, Saskatchewan and Alberta be conducted with protocols established for the Great Lakes, and (3) sampling protocols developed to survey waterbirds in the boreal forest of northern Ontario be extended to other sections of the boreal forest. Adoption of these recommendations would achieve better understanding of national abundance trends, and permit informed future conservation initiatives.…”

Section: Discussionmentioning

confidence: 99%

Current Status and Abundance Trends of Common Terns Breeding at Known Coastal and Inland Nesting Regions in Canada

Morris¹,

Pekarik

Moore³

2012

Waterbirds

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“…Less is known about the nonbreeding distribution of roseate terns, but they occur together with common terns in South America and have also been detected in the Caribbean (Nisbet 1984; Gochfeld et al 1998; Hays et al 1999). Caspian terns have a broad breeding distribution on coastlines, and inland lakes and rivers in North America but are locally uncommon in most parts of their range (Cuthbert and Wires 1999; Wires and Cuthbert 2000; Morris et al 2010). …”

Section: Methodsmentioning

confidence: 99%

Estimating migratory connectivity of birds when re‐encounter probabilities are heterogeneous

Cohen

Hostetler

Royle

et al. 2014

Ecology and Evolution

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Understanding the biology and conducting effective conservation of migratory species requires an understanding of migratory connectivity – the geographic linkages of populations between stages of the annual cycle. Unfortunately, for most species, we are lacking such information. The North American Bird Banding Laboratory (BBL) houses an extensive database of marking, recaptures and recoveries, and such data could provide migratory connectivity information for many species. To date, however, few species have been analyzed for migratory connectivity largely because heterogeneous re-encounter probabilities make interpretation problematic. We accounted for regional variation in re-encounter probabilities by borrowing information across species and by using effort covariates on recapture and recovery probabilities in a multistate capture–recapture and recovery model. The effort covariates were derived from recaptures and recoveries of species within the same regions. We estimated the migratory connectivity for three tern species breeding in North America and over-wintering in the tropics, common (Sterna hirundo), roseate (Sterna dougallii), and Caspian terns (Hydroprogne caspia). For western breeding terns, model-derived estimates of migratory connectivity differed considerably from those derived directly from the proportions of re-encounters. Conversely, for eastern breeding terns, estimates were merely refined by the inclusion of re-encounter probabilities. In general, eastern breeding terns were strongly connected to eastern South America, and western breeding terns were strongly linked to the more western parts of the nonbreeding range under both models. Through simulation, we found this approach is likely useful for many species in the BBL database, although precision improved with higher re-encounter probabilities and stronger migratory connectivity. We describe an approach to deal with the inherent biases in BBL banding and re-encounter data to demonstrate that this large dataset is a valuable source of information about the migratory connectivity of the birds of North America.

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Distribution and abundance of nesting common and Caspian terns on the North American Great Lakes, 1976 to 1999

Cited by 17 publications

References 41 publications

Abundance, distribution, and species assemblages of colonial waterbirds in the boreal region of west-central Manitoba and east-central Saskatchewan

Abundance, distribution, and species assemblages of colonial waterbirds in the boreal region of west-central Manitoba and east-central Saskatchewan

Current Status and Abundance Trends of Common Terns Breeding at Known Coastal and Inland Nesting Regions in Canada

Estimating migratory connectivity of birds when re‐encounter probabilities are heterogeneous

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