Notholca laurentiae and N. michiganensis, New Rotifers from the Laurentian Great Lakes Region

1976 ◽  
Vol 33 (12) ◽  
pp. 2814-2818 ◽  
Author(s):  
Richard S. Stemberger
Keyword(s):  
Great Lakes ◽  
Early Spring ◽  
Laurentian Great Lakes ◽  
Great Lakes Region ◽  
Inland Lakes ◽  
Northern Portion ◽  
Lower Peninsula ◽  
Planktonic Rotifers ◽  
Brackish Water Species ◽  
Water Species

The descriptions of two new planktonic rotifers, both cold stenotherms, is presented. Notholca laurentiae n.sp. is a predominant winter rotifer of the Laurentian Great Lakes, but to date has not been found in inland lakes of the region. Morphologically its closest relative is the European brackish water species, N. salina Focke.Notholca michiganensis n.sp. has been recorded only in the oligotrophic inland lakes of the northern portion of Michigan’s lower peninsula during winter and early spring (water temperatures 0.5–5.2 C). Morphologically, N. michiganensis is similar to, but distinctly smaller than N. frigida Jaschnov.

Comment on “Rate of species introductions in the Great Lakes via ships’ ballast water and sediments”

2008 ◽  
Vol 65 (3) ◽  
pp. 549-553 ◽  
Author(s):  
Janet W Reid ◽  
Patrick L Hudson
Keyword(s):  
Great Lakes ◽  
Ballast Water ◽  
Native Species ◽  
Laurentian Great Lakes ◽  
Great Lakes Region ◽  
Species Introductions ◽  
Neoergasilus Japonicus ◽  
Brackish Water Species ◽  
Current List ◽  
Water Species

The four species of freshwater copepod crustaceans found in ballast water or sediments in ships and characterized as “nonindigenous” to the Laurentian Great Lakes region by Drake and Lodge (Can. J. Fish. Aquat. Sci. 64: 530–538 (2007)) are all widespread, North American natives. Drake and Lodge’s use of these native species to estimate the size of the “source pool” of the richness of potential invasive species resulted in an overestimation of its size. We list the fresh- and brackish-water species of copepods found in or on ships in the Great Lakes and discuss taxonomic and other questions pertaining to some of them. We suggest that Skistodiaptomus pallidus, Cyclops strenuus, Salmincola lotae, Nitokra incerta, and Onychocamptus mohammed be removed from the current list of nonindigenous copepod and branchiuran species established in the Great Lakes system, leaving seven species: Eurytemora affinis, Megacyclops viridis, Neoergasilus japonicus, Heteropsyllus nunni, Nitokra hibernica, Schizopera borutzkyi, and Argulus japonicus.

Persistence of coherence of ice-off dates for inland lakes across the Laurentian Great Lakes region

2005 ◽  
Vol 29 (1) ◽  
pp. 521-527 ◽  
Author(s):  
John J. Magnuson ◽  
Barbara J. Benson ◽  
Olaf P. Jensen ◽  
Taryn B. Clark ◽  
Virginia Card ◽  
...  
Keyword(s):  
Great Lakes ◽  
Laurentian Great Lakes ◽  
Great Lakes Region ◽  
Inland Lakes

A 900-year record of effective moisture in the Laurentian Great Lakes region

2021 ◽  
Vol 270 ◽  
pp. 107174
Author(s):  
R.M. Doyle ◽  
Z. Liu ◽  
J.T. Walker ◽  
R. Hladyniuk ◽  
K.A. Moser ◽  
...  
Keyword(s):  
Great Lakes ◽  
Laurentian Great Lakes ◽  
Great Lakes Region ◽  
Effective Moisture

Early Spring Herb Communities in Mesophytic Forests of the Great Lakes Region

Ecology ◽  
1982 ◽  
Vol 63 (4) ◽  
pp. 1050-1063 ◽  
Author(s):  
Robert S. Rogers
Keyword(s):  
Great Lakes ◽  
Early Spring ◽  
Great Lakes Region

scholarly journals Climatic-change implications from long-term (1823-1994) ice records for the Laurentian Great Lakes

1995 ◽  
Vol 21 ◽  
pp. 383-386 ◽  
Author(s):  
R.A. Assel ◽  
D.M. Robertson ◽  
M.H. Hoff ◽  
J.H. Selgeby
Keyword(s):  
Great Lakes ◽  
Climatic Changes ◽  
The Other ◽  
Laurentian Great Lakes ◽  
Great Lakes Region ◽  
Lake Mendota ◽  
Air Temperatures ◽  
The 1960S ◽  
Different Parts

Long-term ice records (1823-1994) from six sites in different parts of the Laurentian Great Lakes region were used to show the type and general timing of climatic changes throughout the region. The general timing of both freeze-up and ice loss varies and is driven by local air temperatures, adjacent water bodies and mixing, and site morphometry. Grand Traverse Bay and Buffalo Harbor represent deeper-water environments affected by mixing of off-shore waters; Chequamegon Bay, Menominee, Lake Mendota, and Toronto Harbor represent relatively shallow-water, protected environments. Freeze-up dates gradually became later and ice-loss dates gradually earlier from the start of records to the 1890s in both environments, marking the end of the “Little lce Age”. After this, freeze-up dates remained relatively constant, suggesting little change in early-winter air temperatures during the 20th century. Ice-loss dates at Grand Traverse Bay and Baffalo Harbor but not at the other sites became earlier during the 1940s and 1970s and became later during the 1960s. The global warming of the 1980s was marked by a trend toward earlier ice-loss dates in both environments.

Toxicological significance of mercury in yellow perch in the Laurentian Great Lakes region

2012 ◽  
Vol 161 ◽  
pp. 350-357 ◽  
Author(s):  
James G. Wiener ◽  
Mark B. Sandheinrich ◽  
Satyendra P. Bhavsar ◽  
Joseph R. Bohr ◽  
David C. Evers ◽  
...  
Keyword(s):  
Great Lakes ◽  
Yellow Perch ◽  
Laurentian Great Lakes ◽  
Great Lakes Region ◽  
Toxicological Significance

Shellfishing Seasons in the Prehistoric Southeastern United States

1986 ◽  
Vol 51 (1) ◽  
pp. 21-37 ◽  
Author(s):  
Cheryl Claassen
Keyword(s):  
United States ◽  
Brackish Water ◽  
Gulf Coast ◽  
Negative Impact ◽  
Atlantic Coast ◽  
Southeastern United States ◽  
Early Spring ◽  
Warm Weather ◽  
Brackish Water Species ◽  
Water Species

Shellfish seasonality studies are summarized in this article, which presents the results of analysis at 94 sites in nine southeastern states. All but six of the sites are middens or shell lenses composed of marine or brackish water species (M. mercenaria, R. cuneata, D. variabilis). Shells in those sites along the Atlantic coast were collected from fall to early spring, while shells in sites on the Gulf coast were collected during early spring to summer. Freshwater shellfish middens in four states have been investigated and consistently indicated collection during warm weather. The uniformity of the results indicates that the variation in species used, techniques used, sample sizes, or geography have no noticeable negative impact on the usefulness of the results. It is argued that shellfish were a staple in the diet of many prehistoric horticultural peoples in spite of the fact that they are a dietary supplement for modern hunters and collectors.

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