HIGH ARCTIC PONDS RECEIVING BIOTRANSPORTED NUTRIENTS FROM A NEARBY SEABIRD COLONY ARE ALSO SUBJECT TO POTENTIALLY TOXIC LOADINGS OF ARSENIC, CADMIUM, AND ZINC

2009 ◽  
Vol 28 (11) ◽  
pp. 2426 ◽  
Author(s):  
Samantha K. Brimble ◽  
Karen L. Foster ◽  
Mark L. Mallory ◽  
Robie W. Macdonald ◽  
John P. Smol ◽  
...  
1994 ◽  
Vol 131 (4) ◽  
pp. 401-434
Author(s):  
Marianne S. V. Douglas ◽  
John P. Smol

Hydrobiologia ◽  
1989 ◽  
Vol 173 (3) ◽  
pp. 231-242 ◽  
Author(s):  
Thomas Nogrady ◽  
John P. Smol

2012 ◽  
Vol 49 (2) ◽  
pp. 205-219 ◽  
Author(s):  
Emily M. Stewart ◽  
Neal Michelutti ◽  
Jules M. Blais ◽  
Mark L. Mallory ◽  
Marianne S. V. Douglas ◽  
...  

2008 ◽  
Vol 40 (3) ◽  
pp. 783-791 ◽  
Author(s):  
N. Michelutti ◽  
J. M. Blais ◽  
H. Liu ◽  
B. E. Keatley ◽  
M. S. V. Douglas ◽  
...  

Polar Biology ◽  
2010 ◽  
Vol 34 (6) ◽  
pp. 799-812 ◽  
Author(s):  
Neal Michelutti ◽  
Mark L. Mallory ◽  
Jules M. Blais ◽  
Marianne S. V. Douglas ◽  
John P. Smol

ARCTIC ◽  
2010 ◽  
Vol 63 (1) ◽  
Author(s):  
Anna Abnizova ◽  
Kathy L. Young

2008 ◽  
Vol 39 (4) ◽  
pp. 309-321 ◽  
Author(s):  
Anna Abnizova ◽  
Kathy L. Young

Arctic wetland environments are considered to be sensitive to ongoing climate change but they have received limited attention despite their ecological importance. To understand and quantify better the hydrologic processes which are leading to the sustainability and demise of High Arctic ponds, a water balance framework was employed on several ponds situated in two broad geomorphic areas near Creswell Bay, Somerset Island (72°43′N, 94°15′W). These ponds are also linked to an upland area through a range of linear features: stream, late-lying snowbeds and frost cracks. This study assesses the importance of these features with respect to the sustainability of these wetland ponds. A pond's position in the moraine landscape was important in determining its connectivity to a nearby stream and late-lying snowbed. Close proximity to a stream draining a large upland snow-covered catchment ensures steady water levels during the snowmelt period. Once discharge slows, a late-lying snowbed continues to supply the pond and others nearby with meltwater. The deeply thawed, sandy coastal zone is characterized by frost cracks, which contribute to the patterned ground of this wetland zone. These cracks, when situated downslope of ponds, function primarily as ‘sinks’ and serve to deprive small and medium-sized ponds of water during dry periods, often leading to their desiccation.


Geology ◽  
2020 ◽  
Author(s):  
Wenhan Cheng ◽  
Linda E. Kimpe ◽  
Mark L. Mallory ◽  
John P. Smol ◽  
Jules M. Blais

Seabirds in the Canadian Arctic congregate in large colonies, producing oases of biological productivity and diversity in coastal regions. Here, we examined sterols, stanols, and stable isotopes (δ15N and δ13C) in three 14C-dated pond sediment cores near a large seabird colony and archaeological site on Devon Island (Nunavut, Canada), showing historical occupation by the seabirds and an ancient human (Thule or Norse) settlement over an ~1100 yr time period. Coprostanol in the sediment records captures the presence of humans at ca. 1150 CE, followed by their abandonment of the site by ca. 1300 CE. Increased seabird presence at this site after ca.1200 CE is indicated by increases in δ15N and cholesterol/sitosterol. Seabird population expansion is observed after ca. 1600 CE in δ15N and cholesterol/sitosterol profiles, coinciding with European whaling activities that expanded in the seventeenth through nineteenth centuries. Our study provides insights into human and seabird occupation in the High Arctic to inform archaeological and conservation efforts.


Sign in / Sign up

Export Citation Format

Share Document