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Zoology

Marginal populations

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Full-Text Articles in Animal Sciences

Notes On Two Species Of Plants At The Margins Of Their Ranges In Cedarburg Bog, James A. Reinartz Oct 1983

Notes On Two Species Of Plants At The Margins Of Their Ranges In Cedarburg Bog, James A. Reinartz

Field Station Bulletins

In June 1983 two large patches of Fringed Polygala were found in the Cedar-Tamarack woods at the north end of Cedarburg Bog. These patches had obviously been established for a number of years but the species had never previously been noticed in the bog. These Ozaukee County populations are southern disjuncts separated by at least 60 miles from the main part of the species' distribution.


Vascular Plants Near The Margins Of Their Range In Cedarburg Bog. Part Ii. Dicots, James A. Reinartz, Gay E. Reinartz Apr 1982

Vascular Plants Near The Margins Of Their Range In Cedarburg Bog. Part Ii. Dicots, James A. Reinartz, Gay E. Reinartz

Field Station Bulletins

There are two species of gymnosperms and 18 monocots that are near the southern edge of their geographic range in Cedarburg Bog (Reinartz and Reinartz 1981). Six of these may actually reach their range boundary in the bog. Nine species of the Cyperaceae and seven Orchidaceae comprise the bulk of the monocot species that are near their southern limits. The purpose of this paper is to provide an annotated listing of dicot species which have geographically marginal populations in Cedarburg Bog.


Summer Birds Reaching The Margins Of Their Range At The Cedarburg Bog And The Uwm Field Station, John H. Idzikowski Apr 1982

Summer Birds Reaching The Margins Of Their Range At The Cedarburg Bog And The Uwm Field Station, John H. Idzikowski

Field Station Bulletins

In a previous article, Reinartz and Reinartz (1981) described the monocot and gymnosperm plants that reach their range limits at the Cedarburg Bog. The bog forest consists primarily of·white cedar (Thuja canadensis) and tamarack (Larix laricina) and includes a string bog plant community, all typical of wetlands further north. The summer fauna also possesses an ecologically northern relict flavor. This is especially true of the most conspicuous vertebrates, the birds. Many bird species found in the bog are more closely associated with the transitional and boreal forests of Canada and northern Wisconsin than with the deciduous forests and fields that …


Vascular Plants Near The Margins Of Their Range In Cedarburg Bog. Part 1. Gymnosperms And Monocots, James A. Reinartz, Gay E. Reinartz Oct 1981

Vascular Plants Near The Margins Of Their Range In Cedarburg Bog. Part 1. Gymnosperms And Monocots, James A. Reinartz, Gay E. Reinartz

Field Station Bulletins

Marginal populations are those located at the extreme or periphery of a species' range. In the context of this paper, marginal populations refer to a geographical periphery rather than to possible ecological margins. A wide ranging species may be composed of several different varieties or ecotypes. Marginal populations of plants are of special interest to plant taxonomists, ecologists, ecological geneticists and biogeographers because they may exhibit different characteristics than more centrally located populations. This is likely because plants at the boundaries of their species' range may experience extreme ecological conditions beyond which they cannot survive.