Mammals on the Virginia Barrier Islands

Dueser, Raymond D.; Brown, William C.; Hogue, Gregory S.; McCaffrey, C. A.; McCuskey, Sue Ann; Hennessey, Gerard J.

doi:10.2307/1379822

Cited by 18 publications

(3 citation statements)

References 8 publications

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“…In 5,119 trap nights we compiled 735 captures of 545 individuals of Oryzomys palustris (rice rat), Mus musculus (house mouse), Microtus pennsylvanicus (meadow vole), and Rattus norvegicus (Norway rat). Sciurus carolinensis (gray squirrel) was observed on two islands but was never captured (Dueser et al 1979).…”

Section: Samplingmentioning

confidence: 99%

Ecological Correlates of Insular Rodent Diversity

Dueser¹,

Brown²

1980

Ecology

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Rodent populations were censused on nine Virginia barrier islands during the summers of 1975 and 1977. The five species observed include Microtus pennsylvanicus, Mus musculus, Oryzomys palustris, Rattus norvegicus, and Sciurus carolinensis. The number of rodent species ranged from zero on a small, low—lying, sandy island to five on a large, elevated, forested island. Rodent species richness(diversity) increased directly with island area, elevation, vegetation height, and habitat complexity (i.e., the number of distinct woody plant associations). Because of strict zonation of plant associations, increased habitat complexity represents increased availability of exploitable patches of habitat. As expected from studies of mainland rodent communities, this patchiness appears to promote increased species diversity. Each species exhibits and "exploitation specialty" involving little spatial overlap with other species diversity. Each species exhibits an "exploitation speciality" involving little spatial overlap with other species. Although no direct tests have been conducted, we speculate that the rodent communities of these islands are at equilibrium. Low rates of colonization and high rates of extinction interact to produce low species diversity and a steep species—area curve.

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Section: Samplingmentioning

confidence: 99%

Ecological Correlates of Insular Rodent Diversity

Dueser¹,

Brown²

1980

Ecology

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“…Similarly, we defined an island source as the upland portion of an island (i.e., any area higher in elevation than tidal marsh) that supported a year‐round population of the focal species. For raccoons, we used prior reports (Paradiso and Handley , Dueser et al , Hanlon et al ) and extensive field investigations between 1998 and 2007 (Keišs , Martin , Dueser et al ; B. R. Truitt, The Nature Conservancy, personal communication) to identify 11 source islands (Table ). Each source island had woody habitat and a source of fresh water, both of which are positively correlated with raccoon population density and their temporal stability in fragmented landscapes (Beasley et al ).…”

Section: Methodsmentioning

confidence: 99%

Cost‐distance analysis of mesopredators as a tool for avian habitat restoration on a naturally fragmented landscape

Porter¹,

Dueser²,

Moncrief

2015

J Wildl Manag

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Removal of mammalian mesopredators is a strategy frequently applied to problems of conservation management, such as protection of rare or endangered species. Effectiveness of predator removal is often dependent on the ease with which additional predators can immigrate into the removal area. We applied cost-distance analysis, coupled to a sensitivity analysis, and least-cost path analysis to raccoons (Procyon lotor) and red foxes (Vulpes vulpes) on the Virginia barrier islands to determine the landscape resistance (i.e., difficulty) for mesopredators to reach individual islands from both mainland and island sources, to assess the relative role of mainland versus island populations as sources of immigrants to unoccupied (or depopulated) islands, and to formulate strategies that focus management efforts on a few key predator sources. The minimum energetic resistances to immigration varied over 3 orders of magnitude, making some islands better targets for removal efforts than others. Additionally, because of differences in the distribution of resident populations on the islands, resistance to immigration to a typical island is at least 3 times less for raccoons than for red foxes. Landscape resistance to red fox immigration is typically lower from the mainland, whereas for raccoons inter-island movements are typically less costly. Empirical data from long-term field studies of raccoons and red foxes in this system support the resistance structure identified. Overwater transits made by marked and resighted raccoons all were relatively short and relatively low-cost. Similarly, islands that were recolonized following the removal of raccoons and red foxes all were characterized by very low resistance values. These results are used to identify specific islands for which predator removal efforts are most likely to be successful in aiding the recovery of beach-nesting and colonial waterbirds in this system. A similar approach may be applied in any landscape where there are distinct differences in the costs of traversing different elements of the landscape. Ó 2015 The Wildlife Society.

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“…Populations of O. palustris from coastal plains or islands are the most studied. Dueser et al (1979) found O. palustris on 9 of 11 barrier islands off the Virginia coast. Two of the five subspecies are restricted to islands in southeastern Florida: Oryzomys palustris planirostris to Little Pine and Pine islands and O. p. sanibeli to Sanibel Island.…”

Section: Distributionmentioning

confidence: 99%

Oryzomys palustris (Rodentia: Cricetidae)

Rose

2023

Mammalian Species

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Oryzomys palustris (Harlan, 1837), the common marsh rice rat, is an Oryzomyine rodent with a tail nearly as long as the head and body, grayish above and white below with long-toed white feet. This account is an update of Mammalian Species 176 on the subject species by James L. Wolfe (1982a), incorporating 103 new references, most published since 1982. Oryzomys palustris, one of six living and two extinct species in this Neotropical genus, is semiaquatic and omnivorous, being highly carnivorous in some populations. It is parapatric with O. texensis in the western portion of its distribution in the southern United States. Oryzomys palustris is classified as “Least Concern” (LC) on the International Union for Conservation of Nature Red List.

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Mammals on the Virginia Barrier Islands

Cited by 18 publications

References 8 publications

Ecological Correlates of Insular Rodent Diversity

Ecological Correlates of Insular Rodent Diversity

Cost‐distance analysis of mesopredators as a tool for avian habitat restoration on a naturally fragmented landscape

Oryzomys palustris (Rodentia: Cricetidae)

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