Physical and Chemical Limnology of Char Lake, Cornwallis Island (75° N Lat.)

Schindler, D. W.; Welch, H. E.; Kalff, Jacob; Brunskill, G. J.; Kritsch, N.

doi:10.1139/f74-092

Cited by 145 publications

(128 citation statements)

References 0 publications

Supporting

Mentioning

119

Contrasting

Order By: Relevance

“…2B to D) comparable to other Arctic lakes, e.g. Toolik Lake (Whalen & Cornwell 1985), Char Lake (Schindler et al 1974) and Barrow ponds (Prentki et al 1980) and to the ultra-oligotrophic Lake Tahoe (Paerl et al 1975). T h e DOC content of the lake (Fig.…”

Section: Microheterotrophic Biomass and Bacterial Productionsupporting

confidence: 63%

“…Ellis-Evans 1991, Laybourn-Parry et al 1995. Studies on Arctic lakes have focused primarily on physical and chemical parameters (Schindler et al 1974, de March 1975, Whalen & Cornwell 1985, on bacterioplankton (Morgan & Kalff 1972, Hobbie et al 1983, or on algae (Kalff 1967, Miller et al 1986). However, there have been only a few investigations in Arctic lakes, focusing on the coupling between autotrophic and heterotrophic processes within the microbial food web .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamics of phyto- and bacterioplankton in a high Arctic lake on Franz Joseph Land archipelago

Panzenböck¹,

Möbes-Hansen²,

Albert³

et al. 2000

Aquat. Microb. Ecol.

View full text Add to dashboard Cite

Pelagic food web processes with focus on phyto-and bacterioplankton dynamics were followed in a high Arctic lake on Ziegler Island, Franz Joseph Land archipelago, during July and August 1996. The oligotrophlc, permanently ice-covered lake is characterized by a rather short pelagic food web with rotifers representing the highest trophic level. Phytoplankton biomass and net primary production averaging 1.8 pg chl a 1-' and 22 pg C 1-' d-', respectively, decreased dunng the investigation period. Photosynthetic extracellular release (P,,) corrected for bacterial uptake was high and contributed between 31 % (July) and 96% (August) of total primary production. The abundance of bacteria (9.3 to 17.3 X 10' ml-l) and flagellates (7.8 to 17.3 X 10' ml-l) varied within a narrow range. Bacterioplankton production ranging from 1.2 to 3.9 pg C 1-' d-' and bacterial growth rates (0.1 to 0.3 d-') increased with increasing % P,,, indicating that algal exudates are the major carbon source for bacterioplankton. Bacterial carbon demand (assuming a 50% growth efficiency) amounted to 19% of gross pelagic primary production (P,,,, + P,,) and 31 % of P,, during the investigation period. Evidence was found that bacterioplankton metabolism responds quickly to slight increases in temperature (1.2 to 2.0°C) with increased growth. Overall, production rates of phyto-and bacterioplankton in this high Arctic lake are simdar to other Arctic lakes studied thus far, and the food web structure is even simpler than in most lakes at similar latitudes.

show abstract

Section: Microheterotrophic Biomass and Bacterial Productionsupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Dynamics of phyto- and bacterioplankton in a high Arctic lake on Franz Joseph Land archipelago

Panzenböck¹,

Möbes-Hansen²,

Albert³

et al. 2000

Aquat. Microb. Ecol.

View full text Add to dashboard Cite

show abstract

“…The two lakes have similar landscapes but vary greatly in area (Char Lake, 0.53 km 2 [53]; Lake A, 5 km 2 [59]) and lie 1,000 km apart. The low level of similarity between the bacterial communities of the air and the snow samples could reflect the different time spans of sampling, since most of the snow microbiota would have accumulated over weeks to months prior to being sampled, while the air sampling provided only a snapshot of the dispersed microbiota.…”

Section: Vol 77 2011 Microbial Communities In Remote Arctic Snow 3239mentioning

confidence: 99%

Microbes in High Arctic Snow and Implications for the Cold Biosphere

Harding

Jungblut

Lovejoy

et al. 2011

Appl Environ Microbiol

198

View full text Add to dashboard Cite

We applied molecular, microscopic, and culture techniques to characterize the microbial communities in snow and air at remote sites in the Canadian High Arctic (Ward Hunt Island, Ellesmere Island, and Cornwallis Island, latitudes 74 to 83 o N). Members of the Bacteria and Eukarya were prevalent in the snow, and their small subunit (SSU) rRNA gene signatures indicated strong local aerial transport within the region over the preceding 8 months of winter snowpack accumulation. Many of the operational taxonomic units (OTUs) were similar to previously reported SSU rRNA gene sequences from the Arctic Ocean, suggesting the importance of local aerial transport processes for marine microbiota. More than 47% of the cyanobacterial OTUs in the snow have been previously found in microbial mats in the region, indicating that this group was also substantially derived from local sources. Viable cyanobacteria isolated from the snow indicated free exchange between the snow and adjacent mat communities. Other sequences were most similar to those found outside the Canadian Arctic but were from snow, lake and sea ice, glaciers and permafrost, alpine regions, Antarctica, and other regions of the Arctic, supporting the concept of global distribution of microbial ecotypes throughout the cold biosphere.

show abstract

“…Although there are some data on small northern and arctic lakes (e.g. Schindler et al 1974) the only complete data set for a medium-sized lake apparently is that for Babine Lake, British Columbia (Farmer 1975;FarmerandCarmack 1981;Lee 1977). These data wcrc directed at mixing processes beneath the ice, and only scattered information on the ice and snow conditions is available.…”

mentioning

confidence: 99%

Thermal simulation of a lake with winter ice cover1

Patterson

Hamblin

1988

Limnology & Oceanography

119

103

View full text Add to dashboard Cite

A one-dimensional thermodynamic model of a two-component ice and snow cover is added to an existing one-dimensional lake mixing model. Emphasis is placed on the thermodynamic coupling between the ice and mixing models-absent in previous models. The two-dimensional effects of partial ice cover are incorporated into this one-dimensional framework by using a minimum ice thickness. The model is applied to Lake Laberge, Yukon Territory, and to Babine Lake, British Columbia, for periods covering the formation and demise of full ice cover. The results of the model are compared to snow and ice measurements in the first case and to water column data during the spring period in the second. The comparisons are good, implying that the ice and snow model is performing satisfactorily and emphasizing the importance of the coupling between the ice and the underlying water. The successful simulation of the observed mixed layer under the ice, driven by convective stirring caused by short-wave heating below the temperature of maximum density, is an example of the ability of the model to provide physical insight into processes occurring in lakes.

show abstract

Physical and Chemical Limnology of Char Lake, Cornwallis Island (75° N Lat.)

Cited by 145 publications

References 0 publications

Dynamics of phyto- and bacterioplankton in a high Arctic lake on Franz Joseph Land archipelago

Dynamics of phyto- and bacterioplankton in a high Arctic lake on Franz Joseph Land archipelago

Microbes in High Arctic Snow and Implications for the Cold Biosphere

Thermal simulation of a lake with winter ice cover1

Contact Info

Product

Resources

About