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Book Using Physiological Conditions to Assess Current and Future Wood Frog Rana Sylvatica Habitat Use in the Subarctic

Download or read book Using Physiological Conditions to Assess Current and Future Wood Frog Rana Sylvatica Habitat Use in the Subarctic written by Thomas Patrick Hastings and published by . This book was released on 2020 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Effects of Season and Temperature on Certain Aspects of the Physiology of the Alaskan Wood Frog Rana Sylvatica

Download or read book The Effects of Season and Temperature on Certain Aspects of the Physiology of the Alaskan Wood Frog Rana Sylvatica written by Raymond S. Hadley and published by . This book was released on 1969 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Wood Frog Distribution and Habitat Use

Download or read book Wood Frog Distribution and Habitat Use written by Alaska Energy Authority and published by . This book was released on 2012 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this study is to characterize use of the Susitna-Watana Hydroelectric Project area by wood frogs to enable an assessment of potential impacts from development of the Project. The study objectives are to synthesize existing habitat use and distribution data and to evaluate the current distribution of wood frogs in the Project area through a combination of field surveys and habitat occupancy modeling.

Book Multi scale Habitat Selection and Breeding Pond Assessment of an Isolated Wood Frog Lithobates Sylvaticus Population in Wyoming

Download or read book Multi scale Habitat Selection and Breeding Pond Assessment of an Isolated Wood Frog Lithobates Sylvaticus Population in Wyoming written by Katrina A. Cook and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Isolated populations that are separated from the species’ more contiguous range may be particularly susceptible to habitat degradation or disease. Amphibians have experienced population declines worldwide from habitat change because they are sensitive to habitat conditions, and from the chytrid fungus (Batrachochytrium dendrobatidis). Wood Frogs (Lithobates sylvaticus) in Wyoming exist as isolated, glacial relicts. We identified the habitat preferences of a Wood Frog population across multiple seasons and spatial scales, and in relation to chytrid fungus status in the Snowy Range of Wyoming, USA. We also investigated the associations between non-invertebrate and invertebrate metrics with egg mass densities (as a measure of habitat use) and late-stage tadpole densities (as an index of reproductive success). During summer and fall, frogs preferred to be closer to waterbodies and selected aspen, willow, and wet meadow macrohabitats. Summer microhabitat preferences included denser, taller vegetation, higher soil moisture, and those closer to standing water and refugia. When chytrid-positive, frogs in terrestrial habitats tended to switch to areas with higher soil moisture. The density of very tolerant taxa (tolerance value ≥8) slightly outperformed the average biomass of June phytoplankton as the top metric related to egg mass density. Tadpole densities were slightly higher in ephemeral ponds and ponds lacking vertebrate predators. Our results demonstrate spatiotemporal variation in habitat preferences of an isolated amphibian population of concern, and that adults may have specific habitat requirements for choosing a breeding pond. Our work contributes to a growing body of evidence demonstrating interactions between animal behavior, disease, and habitat.

Book Carry Over Effects of Elevated Salinity and Temperature on Wood Frog Rana Sylvatica Survival Growth and Behavior

Download or read book Carry Over Effects of Elevated Salinity and Temperature on Wood Frog Rana Sylvatica Survival Growth and Behavior written by Bernardo A. Traversari and published by . This book was released on 2021 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anthropogenically-induced salinization of freshwater systems due to the application of road de-icing salts and hydrocarbon mining has been identified as a significant environmental stressor for amphibians across the United States. While the effects of salinity during amphibian embryonic and larval stages are fairly well-understood, less is known on whether these effects can carry over to affect post-metamorphic traits. Moreover, it remains unclear if salinity-induced carry-over effects are adaptive or maladaptive for amphibian survival, or if salinity can interact with other environmental conditions, like temperature, to influence amphibian development. To fill in these gaps, we tested the hypothesis that if wood frogs that develop in saline ponds exhibit adaptive plasticity in their osmoregulatory abilities, then individuals raised in elevated salinity environments as larvae would feature greater tolerance to similarly saline post-metamorphic environments (i.e., the match hypothesis). In addition, we also hypothesized that exposure to elevated salinity and temperature during larval development would have measurable impacts on juvenile behaviors. Our results provided no evidence for the match hypothesis, as juveniles reared in high salinities did not survive or grow better in high-salinity soils compared with those in low-salinity soils. However, we do show that juveniles that experienced elevated salinity as larvae tended to increase weight (but not SVL) regardless of post-metamorphic environment, suggesting that there may be differences in food intake or osmoregulation in these animals. We also showed that the interaction between salinity and temperature experienced during the larval stage affects wood frog explorative capacity without necessarily impacting exploitative behavior, providing evidence for behavioral carry-over effects. Taken together, these findings contribute to a growing body of work to show that the larval environment can affect the expression of physiological and behavioral traits after metamorphosis, but how these traits relate to population recruitment still needs to be investigated. Findings from this study also suggests that salinization of both freshwater and woodland soils adjacent to roads has adverse effects on wood frogs in both the aquatic and terrestrial parts of their life cycle.

Book Wood Frog Occupancy and Habitat Use Study Plan Section 10 18 Study Completion Report

Download or read book Wood Frog Occupancy and Habitat Use Study Plan Section 10 18 Study Completion Report written by ABR, Inc and published by . This book was released on 2015 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of wood frogs in the Susitna-Watana Hydroelectric Project area with a focus on assessment of potential effects on them from development of the proposed Project and ways to mitigate those effects. The study includes water bodies and wetlands in the proposed Project area and encompasses the reservoir impoundment zone; dam and powerhouse facilities; access routes (Gold Creek, Chulitna, and Denali (the proposed road linking the dam to the Denali Highway) corridors; and material sites. This document is a comprehensive discussion of the methods and results of the study since the beginning of the study program in 2013 and through 2014, and represents the completion report.

Book The Response of Larval Wood Frogs Rana Sylvatica to Changes in Detrital Quality Driven by Anthropogenic Effects in Ephemeral Ponds

Download or read book The Response of Larval Wood Frogs Rana Sylvatica to Changes in Detrital Quality Driven by Anthropogenic Effects in Ephemeral Ponds written by Jeffrey Patrick Stephens and published by . This book was released on 2011 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amphibian populations worldwide are in decline due to anthropogenic drivers. However, little is known about how changes to the larval environment may affect survival and future recruitment of the species specifically in those environments whose energetics are subsidized by allochthonous input such as litterfall. Using a manipulative mesocosms experment I found that changes in litter type had dramatic and differential affects on all levels of the mesocosm ecosystem including water chemistry, primary producer biomass, and on larval wood frog Rana sylvatica fitness traits. Notably, we found that senescent green ash (a specied of tree declining and at great risk due to the emerald ash borer) produced metamorphs that were larger than all other litter species used and developed at a faster rate with higher survival. This study, indeed, illustrates how regional changes in forest community structure can affect the local dynamics and the physiology of individuals within the forest pond.

Book Wood Frog Occupancy and Habitat Use Study Study Plan Section 10 18 Initial Study Report

Download or read book Wood Frog Occupancy and Habitat Use Study Study Plan Section 10 18 Initial Study Report written by and published by . This book was released on 2014 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of wood frogs in the Susitna-Watana Hydroelectric Project area with a focus on assessment of potential effects on them from development of the proposed Project and ways to mitigate those effects. The study includes water bodies and wetlands in the proposed Project area and encompasses the reservoir impoundment zone; dam and powerhouse facilities; access routes (Gold Creek, Chulitna, and Denali (the proposed road linking the dam to the Denali Highway) corridors; and material sites.

Book Wood Frog Occupancy and Habitat Use Study Study Plan Section 10 18 Initial Study Report

Download or read book Wood Frog Occupancy and Habitat Use Study Study Plan Section 10 18 Initial Study Report written by ABR, Inc and published by . This book was released on 2014 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of wood frogs in the Susitna-Watana Hydroelectric Project area with a focus on assessment of potential effects on them from development of the proposed Project and ways to mitigate those effects. The study includes water bodies and wetlands in the proposed Project area and encompasses the reservoir impoundment zone; dam and powerhouse facilities; access routes (Gold Creek, Chulitna, and Denali (the proposed road linking the dam to the Denali Highway) corridors; and material sites.

Book Spatial Ecology of the Wood Frog Rana Sylvatica

Download or read book Spatial Ecology of the Wood Frog Rana Sylvatica written by Lauri Kealoha Freidenburg and published by . This book was released on 2003 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Behavioral Choice and Demographic Consequences of Wood Frog Habitat Selection in Response to Land Use

Download or read book Behavioral Choice and Demographic Consequences of Wood Frog Habitat Selection in Response to Land Use written by Tracy A. Green Rittenhouse and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Land use is a pervasive form of disturbance affecting natural systems on Earth. My dissertation research is set within the context of a large scale project referred to as Land-use Effects on Amphibian Populations (LEAP), where researchers in Maine, Missouri, and South Carolina are determining the effects of timber harvest on the persistence of amphibian populations. The purpose of my dissertation research was to define adult wood frog nonbreeding habitat in continuous oak-hickory forest and in response to timber harvest. I asked research questions that address the two components of habitat selection: 1) the behavioral choice, and 2) the demographic consequences of that choice. To document behavioral choice, I allowed adults to move freely throughout the circular experimental timber harvest arrays (164 m radius) by using standard radiotelemetry techniques. Prior to timber harvest, I found that wood frogs were not distributed equally throughout oak-hickory forest. Adults used drainages as non-breeding habitat. In addition, the number of frogs that migrated to a specific drainage correlated with the distance between the pond and the drainage. Following timber harvest wood frogs avoided clearcuts and increased movement rates in response to timber harvest. Further, I confirmed the consistency of this behavioral response by conducting experimental displacements and found that adults exhibit site fidelity to non-breeding habitat. Frogs displaced to the center of clearcuts evacuated the clearcuts in one night of rain and 20 of 22 frogs displaced back to the pond returned to the same drainage. To determine demographic consequences, I estimated survival of frogs constrained within microhabitats. Desiccation risks for frogs located on forested ridgetops or in exposed areas within clearcuts were severe. Brushpiles within clearcuts provided microhabitats with similar desiccation risks as microhabitats within forested drainages. I also determined survival of transmittered frogs that moved freely among microhabitats by radio-tracking 117 frogs over 3 years. I documented 29 predation events, 13 desiccation events, and 8 mortalities of unknown cause. Using Coxproportional hazard models, I found that survival within the timber harvest array was 1.7 times lower than survival within continuous forest. Survival was lowest during the drought year of 2005 when all desiccation events occurred. My results indicated that predation and desiccation risks near the breeding ponds are ecological pressures that explain why adult amphibians migrate away from breeding habitat during the nonbreeding season.