Perfect for the classroom or office, Spring Roller Valances can hold up to 5 maps for easy display of each map. Principal causes of declining fish resources in the Southeast are due to habitat perturbations. The southeastern United States as defined here is delimited on the north and west by the Ohio and Mississippi rivers.
The Southeast has about 485 known species of native freshwater fishes, representing 27 families. An alarming 21% of the nearly 300 species of minnows and darters are imperiled in the Southeast. Two species of southeastern fishes have become extinct in the last century: the harelip sucker (Moxostoma lacerum) and the whiteline topminnow (Fundulus albolineatus).
The declining status of freshwater fishes among divergent taxonomic groups and across broad habitat types and geographic areas is interpreted as evidence for widespread and pervasive threats to the entire North American fish fauna (Moyle and Leidy 1992; Warren and Burr 1994).
The Southeast United States Wall Map is produced with durable lamination making it both markable and washable.
This commercial wall map shows all of the following states: Alabama, Arkansas, Florida, Georgia, Mississippi, North Carolina, South Carolina, Tennessee and Louisiana.
The center of this diversity is in the southeastern United States; where as many as 500 species may exist (62% of the continental fauna north of Mexico).

Many fishes are widely distributed in the Southeast and occur in two or more hydrologic regions. Fish and Wildlife Service (USFWS) had designated 15 southeastern fish species as endangered and 12 as threatened, representing 6% of the entire regional fish fauna. In the Southeast, fish declines are the result of the same factors that cause global deterioration of aquatic resources, primarily habitat loss and degraded environmental conditions. Conservation of southeastern fishes will require significant changes in land management and socioeconomic factors (Moyle and Leidy 1992; Warren and Burr 1994), but such changes are necessary to stem future losses of biodiversity.
Many coastal marine species also enter fresh waters of the Southeast, and at least 34 foreign fish species are established in the region. Total numbers of freshwater fishes and percentage imperiled by hydrographic region of the southeastern United States.
Ninety-three fish taxa (19%) are imperiled (endangered, threatened, or of special concern) in the Southeast, including proposed listings and those recognized by other authors (Williams et al.
Total numbers of imperiled fishes in the Southeast during the last 20 years, as recognized by the American Fisheries Society (AFS) and the U.S.
This geographic trend is correlated with both a high level of diversity in the respective hydrologic regions and the quite localized or endemic distributions of many species. The principal causes of freshwater fish imperilment in the Southeast and other areas of the United States are dams and channelization of large rivers, urbanization, agriculture, deforestation, erosion, pollution, introduced species, and the cumulative effects of all these factors (Moyle and Leidy 1992; Warren and Burr 1994).

An example of habitat fragmentation, decline, and isolation of populations of a southeastern freshwater fish, the endangered spotfin chub (Cyprinehla monacha). 1), but other regions of the Southeast also harbor many more species than do similar-sized geographic areas elsewhere in the United States. Among smaller groups of fishes, the most severe status is among the sturgeons and paddlefish, where seven of the eight (86%) southeastern species are in jeopardy. The most insidious threat to southeastern fishes is sedimentation and siltation resulting from poor land-use patterns that eliminate suitable habitat required by many bottom-dwelling species.
Most jeopardized species have restricted distributions, but the number of more geographically widespread species that are disappearing from large portions of their ranges is increasing. Cumulative effects of physical habitat modifications have caused widespread fragmentation of many fish populations in the Southeast (Fig. The southeastern fish fauna is a national treasure of biodiversity that is imminently threatened.
A steady upward trend in designation of imperiled southeastern fishes has occurred in the last 20 years (Fig.

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