NDLI: Double-observer approach to estimating egg mass abundance of pool-breeding amphibians

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Introduction to the symposium: woodland vernal pools in northern temperate forests

Temporary forest pools: can we see the water for the trees?

A review of vertebrate community composition in seasonal forest pools of the northeastern United States

Habitat associations of pool-breeding amphibians in eastern Massachusetts, USA

Canopy closure and amphibian diversity in forested wetlands

The relative importance of wetland size and hydroperiod for amphibians in southern New Hampshire, USA

Can road mortality limit populations of pool-breeding amphibians?

Conserving pool-breeding amphibians in human-dominated landscapes through local implementation of Best Development Practices

Double-observer approach to estimating egg mass abundance of pool-breeding amphibians

Macroinvertebrate community structure across a wetland hydroperiod gradient in southern New Hampshire, USA

A review of basin morphology and pool hydrology of isolated ponded wetlands: implications for seasonal forest pools of the northeastern United States

Estimating hydroperiod suitability for breeding amphibians in southern Rhode Island seasonal forest ponds

Protecting vernal pools: a model from Massachusetts, USA

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Double-observer approach to estimating egg mass abundance of pool-breeding amphibians

Content Provider	Springer Nature Link
Author	Campbell Grant, Evan H. Jung, Robin E. Nichols, James D. Hines, James E.
Copyright Year	2005
Abstract	Interest in seasonally flooded pools, and the status of associated amphibian populations, has initiated programs in the northeastern United States to document and monitor these habitats. Counting egg masses is an effective way to determine the population size of pool-breeding amphibians, such as wood frogs (Rana sylvatica) and spotted salamanders (Ambystoma maculatum). However, bias is associated with counts if egg masses are missed. Counts unadjusted for the proportion missed (i.e., without adjustment for detection probability) could lead to false assessments of population trends. We used a dependent double-observer method in 2002–2003 to estimate numbers of wood frog and spotted salamander egg masses at seasonal forest pools in 13 National Wildlife Refuges, 1 National Park, 1 National Seashore, and 1 State Park in the northeastern United States. We calculated detection probabilities for egg masses and examined whether detection probabilities varied by species, observers, pools, and in relation to pool characteristics (pool area, pool maximum depth, within-pool vegetation). For the 2 years, model selection indicated that no consistent set of variables explained the variation in data sets from individual Refuges and Parks. Because our results indicated that egg mass detection probabilities vary spatially and temporally, we conclude that it is essential to use estimation procedures, such as double-observer methods with egg mass surveys, to determine population sizes and trends of these species.
Starting Page	305
Ending Page	320
Page Count	16
File Format	PDF
ISSN	09234861
Journal	Wetlands Ecology and Management
Volume Number	13
Issue Number	3
e-ISSN	15729834
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2005-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ambystoma maculatum Detection probability Double-observer technique Egg mass counts Monitoring Rana sylvatica Seasonal forest pools Spotted salamander Vernal pool Wood frog Ecology Hydrobiology Evolutionary Biology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Ecology, Evolution, Behavior and Systematics Management, Monitoring, Policy and Law

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Estimating hydroperiod suitability for breeding amphibians in southern Rhode Island seasonal forest ponds

Within-pond parameters affecting oviposition by wood frogs and spotted salamanders

Can road mortality limit populations of pool-breeding amphibians?

Monitoring created seasonal pools for functional success: A six-year case study of amphibian responses, Sears Island, Maine, USA

Data from: Habitat traits and species interactions differentially affect abundance and body size in pond-breeding amphibians (Dataset)

Data from: Limited influence of local and landscape factors on finescale gene flow in two pond-breeding amphibians (Dataset)

Data from: Cross-scale interactions and the distribution-abundance relationship (Dataset)

Within-Pond Oviposition Site Selection in Two Spring-Breeding Amphibians (Ambystoma maculatum and Rana sylvatica)

Contrasting road effect signals in reproduction of long- versus short-lived amphibians

Double-observer approach to estimating egg mass abundance of pool-breeding amphibians

Similar Documents

Estimating hydroperiod suitability for breeding amphibians in southern Rhode Island seasonal forest ponds

Within-pond parameters affecting oviposition by wood frogs and spotted salamanders

Can road mortality limit populations of pool-breeding amphibians?

Monitoring created seasonal pools for functional success: A six-year case study of amphibian responses, Sears Island, Maine, USA

Data from: Habitat traits and species interactions differentially affect abundance and body size in pond-breeding amphibians (Dataset)

Data from: Limited influence of local and landscape factors on finescale gene flow in two pond-breeding amphibians (Dataset)

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Within-Pond Oviposition Site Selection in Two Spring-Breeding Amphibians (Ambystoma maculatum and Rana sylvatica)

Contrasting road effect signals in reproduction of long- versus short-lived amphibians

Double-observer approach to estimating egg mass abundance of pool-breeding amphibians