Great Lakes coastal wetland habitat use by seven turtle species: influences of wetland type, vegetation, and abiotic conditions

Wieten, Alex C.; Cooper, Matthew; Parker, Aaron D.; Uzarski, Donald G

doi:10.1007/s11273-011-9240-4

Cited by 9 publications

(8 citation statements)

References 47 publications

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“…), water lily (Nuphar advena and Nymphaea odorata), common reed (Phragmites australus), and various species of submerged aquatic vegetation (Albert 2003). These characteristics make Lake Michigan drowned river mouth wetlands ideal habitat for a number of turtle species (Wieten et al 2012).…”

Section: Methodsmentioning

confidence: 99%

“…For example, marine turtles accumulate cadmium primarily via their diet (Caurant et al 1999). Since freshwater turtles feed at multiple trophic levels (Georges 1982) and often inhabit degraded aquatic ecosystems (Wieten et al 2012), they are at particular risk for heavy metal contamination. Relative to other macrofauna such as fish and waterfowl, turtles remain an infrequently studied component of Lake Michigan coastal ecosystems, especially with regard to heavy metal contamination.…”

Section: Introductionmentioning

confidence: 99%

“…Painted turtles (Chrysemys picta) and snapping turtles (Chelydra serpentina) have been observed at high densities in contaminated Lake Michigan wetlands (Cooper et al 2009;Wieten et al 2012;De Catanzaro and Chow-Fraser 2010) and thus are likely exposed to metal contamination. Freshwater turtles also live in close proximity to the sediment where heavy metals are often bound (Calmano et al 1994).…”

Section: Introductionmentioning

confidence: 99%

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Body burdens of heavy metals in Lake Michigan wetland turtles

Smith

Cooper

Kosiara

et al. 2016

Environ Monit Assess

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Tissue heavy metal concentrations in painted (Chrysemys picta) and snapping (Chelydra serpentina) turtles from Lake Michigan coastal wetlands were analyzed to determine (1) whether turtles accumulated heavy metals, (2) if tissue metal concentrations were related to environmental metal concentrations, and (3) the potential for non-lethal sampling techniques to be used for monitoring heavy metal body burdens in freshwater turtles. Muscle, liver, shell, and claw samples were collected from painted and snapping turtles and analyzed for cadmium, chromium, copper, iron, lead, magnesium, manganese, and zinc. Turtle tissues had measurable quantities of all eight metals analyzed. Statistically significant correlations between tissue metal concentrations and sediment metal concentrations were found for a subset of metals. Metals were generally found in higher concentrations in the larger snapping turtles than in painted turtles. In addition, non-lethal samples of shell and claw were found to be possible alternatives to lethal liver and muscle samples for some metals. Human consumption of snapping turtles presents potential health risks if turtles are harvested from contaminated areas. Overall, our results suggest that turtles could be a valuable component of contaminant monitoring programs for wetland ecosystems.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Body burdens of heavy metals in Lake Michigan wetland turtles

Smith

Cooper

Kosiara

et al. 2016

Environ Monit Assess

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“…In Wisconsin, hundreds of map turtles were often collected per day in gill nets set for carp (Vogt 1980). Map turtles are also occasionally captured in fyke nets used in commercial fisheries (Carrière et al 2006;Gislason et al 2010;Larocque et al 2012a;Wieten et al 2012;Midwood et al 2015). Carrière et al (2006) found 16 dead G. geographica in commercial fishing fyke nets in the St. Lawrence River in a single week.…”

Section: 8mentioning

confidence: 99%

Graptemys geographica (LeSueur 1817) – Northern Map Turtle, Common Map Turtle

Vogt¹,

Bulté²,

Iverson³

2018

Chelonian Research Monographs

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The Northern Map Turtle, Graptemys geographica (Family Emydidae), is a mediumsized sexually dimorphic freshwater turtle species (female carapace length to 292 mm, males to 160 mm) and the sister taxon to all other map turtle species. It is often common in rivers and lakes within its North American range. The turtles make extensive movements within their habitats for nesting, basking, and feeding. Mating occurs in fall and spring; hibernation lasts from October to mid-April in northern regions, and most hatchlings overwinter in the nest. Northern Map Turtles are primarily carnivorous, feeding predominately on snails, bivalves (including invasive dreisennid mussels), and aquatic insect larvae. Two to three clutches of 6 to 20 eggs are laid each year between late May and mid-July. Because males mature after about 4 years and females require about 10 years, adult sex ratios are often skewed towards males. Sex ratios are also influenced by nest temperatures, with warmer nests producing females and cool nests producing males. Direct and indirect human activities, including fisheries by-catch mortality, appear to be responsible for some population declines of this species in some regions, but G. geographica is not at this time considered Threatened.distRiBution. -Canada, USA. Southwestern Quebec and southeastern Ontario to central Alabama, northern Louisiana, west to central Minnesota and eastern Kansas and Arkansas, with scattered isolated populations in the northeastern USA in Vermont, New York, New Jersey, and Pennsylvania.

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“…However, for most turtles this is poorly known. Freshwater turtles are particularly vulnerable to habitat fragmentation, as they not only depend on the aquatic environment, but also need the terrestrial environment for nesting, basking, dispersal and hibernation (Marchand and Litvaitis 2004;Ryan et al 2008;Wieten et al 2012;Hill and Vodopich 2013;Ryan et al 2014;Hamer et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Where are the turtles when they are not? Underwater refuges used by Hydromedusa tectifera COPE, 1869 in a suburban stream

et al. 2020

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Habitat requirements of Hydromedusa tectifera from an urban impacted stream from the Buenos Aires province, the Rodriguez stream, are here studied. We describe the type of underwater refuges, how they are used in different stream sections, stream margins, year season, size class and sex of the individuals, and analyze patterns of recurrence and aggregative use of refuges. Fieldwork was carried out from March 2017 to January 2018. Turtles were caught manually recording the following variables: site, transect and margin, sex, straight carapace length, and weight. Substrate types are differently used according to stream section, stream margin, year season and size class of individuals, but no difference was found between sexes. In the whole stream, most used refuges were the hollows on the margins (55.05%), followed by marginal aquatic vegetation (19.27%). Turtles of all class sizes and both sexes refuge into hollows on the stream margins. Despite different microhabitats provide refuge to turtles during all year seasons, hollows are the most important refuge during extreme cold and extreme hot seasons. In addition, turtle recaptures evidence a recurrence and aggregative pattern in the use of refuges. This information provides insight into the key aspects of the microhabitat requirements of the species and will be certainly useful in mitigating and preventing negative effects of the current stream management policies. It is worth highlighting the need to keep the stream margins unaltered to favor the presence of turtles in urban environments.

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Great Lakes coastal wetland habitat use by seven turtle species: influences of wetland type, vegetation, and abiotic conditions

Cited by 9 publications

References 47 publications

Body burdens of heavy metals in Lake Michigan wetland turtles

Body burdens of heavy metals in Lake Michigan wetland turtles

Graptemys geographica (LeSueur 1817) – Northern Map Turtle, Common Map Turtle

Where are the turtles when they are not? Underwater refuges used by Hydromedusa tectifera COPE, 1869 in a suburban stream

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