Predictors of specialist avifaunal decline in coastal marshes

Correll, Maureen D.; Wiest, Whitney A.; Hodgman, Thomas P.; Shriver, W. Gregory; Elphick, Chris S.; McGill, Brian J.; O’Brien, Kathleen; Olsen, Brian J.

doi:10.1111/cobi.12797

Cited by 64 publications

(75 citation statements)

References 59 publications

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“…One is estimating change in species over time, such as the percent change in occupancy or abundance per year, and the other is estimating occupancy or population size of species in a certain area at a particular time (MacKenzie et al 2003, Royle 2004a. For estimating or modeling change, occurrence or counts of individuals from call broadcast-assisted point counts are often used as the response variable (e.g., Tozer 2016, Correll et al 2017. This is because broadcasts dramatically increase detections of elusive species, and increased detections result in increased statistical power to detect trends (Steidl et al 2013).…”

Section: Discussionmentioning

confidence: 99%

“…The standardized marsh bird protocol is more useful because it (1) uses standardized call broadcasts of elusive species during each survey, (2) involves repeated surveys per year at each survey point, and (3) requires survey points occur within suitable marsh bird habitat. This generates higher detection probabilities for elusive species and greater statistical power, and thus, the standardized marsh bird protocol has been adopted by various marsh bird monitoring programs throughout North America (e.g., Seamans et al 2013, Conway and Seamans 2016, Tozer 2016, Correll et al 2017). …”

Section: Introductionmentioning

confidence: 99%

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Influence of call broadcast timing within point counts and survey duration on detection probability of marsh breeding birds

Tozer¹,

Falconer²,

Bracey³

et al. 2017

ACE

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Norment. 2017. Influence of call broadcast timing within point counts and survey duration on detection probability of marsh breeding birds. Avian Conservation and Ecology 12 (2) ABSTRACT. The Standardized North American Marsh Bird Monitoring Protocol recommends point counts consisting of a 5-min passive observation period, meant to be free of broadcast bias, followed by call broadcasts to entice elusive species to reveal their presence. Prior to this protocol, some monitoring programs used point counts with broadcasts during the first 5 min of 10-min counts, and have since used 15-min counts with an initial 5-min passive period (P 1 ) followed by 5 min of broadcasts (B) and a second 5-min passive period (P 2 ) to ensure consistency across years and programs. Influence of timing of broadcasts within point counts and point count duration, however, have rarely been assessed. Using data from 23,973 broadcast-assisted 15-min point counts conducted throughout the Great Lakes-St. Lawrence region between 2008 and 2016 by Bird Studies Canada's Marsh Monitoring Program and Central Michigan University's Great Lakes Coastal Wetland Monitoring Program, we estimated detection probabilities of individuals for 14 marsh breeding bird species during P 1 B compared to BP 2 , P 1 compared to P 2 , and P 1 B compared to P 1 BP 2 . For six broadcast species and American Bittern (Botaurus lentiginosus), we found no significant difference in detection during P 1 B compared to BP 2 , and no significant difference in four of the same seven species during P 1 compared to P 2 . We observed small but significant differences in detection for 7 of 14 species during P 1 B compared to P 1 BP 2 . We conclude that differences in timing of broadcasts causes no bias based on counts from entire 10-minute surveys, although P 1 B should be favored over BP 2 because the same amount of effort in P 1 B avoids broadcast bias in all broadcast species, and 10-min surveys are superior to 15-min surveys because modest gains in detection of some species does not warrant the additional effort. We recommend point counts consisting of 5 min of passive observation followed by broadcasts, consistent with the standardized marsh bird protocol, for surveying marsh breeding birds.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of call broadcast timing within point counts and survey duration on detection probability of marsh breeding birds

Tozer¹,

Falconer²,

Bracey³

et al. 2017

ACE

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“…This study provides one possible tool to more holistically address health across habitat types. For example, tidal restrictions like dams can impact rivers, wetlands, and embayments and negatively impact wildlife (Bednarek 2001;Correll 2016). Dams can limit sediment supply, affecting the resilience of sediment-limited salt marshes (Correll 2016).…”

Section: Link Goals Across Habitat Typesmentioning

confidence: 99%

“…For example, tidal restrictions like dams can impact rivers, wetlands, and embayments and negatively impact wildlife (Bednarek 2001;Correll 2016). Dams can limit sediment supply, affecting the resilience of sediment-limited salt marshes (Correll 2016). Dams can also cause poor water quality due to lack of flow, which in turn exacerbates thermal stress, hypoxia, and impacts eelgrass health (Bednarek 2001;Hemminga and Duarte 2000).…”

Section: Link Goals Across Habitat Typesmentioning

confidence: 99%

Advancing Coastal Habitat Resiliency Through Landscape-Scale Assessment

et al. 2017

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Coastal areas are among the most biologically rich regions in the world. They provide tremendous benefit to people through ecological services like pollution filtration, carbon sequestration, and storm protection. However, human activity has decreased the ability of ecosystems to provide these services, and in many coastal areas, restoration is not as effective as it could be. Limited success is largely attributed to vague goals and a lack of holistic, science-informed planning. Quantifying coastal habitat health can aid in setting better restoration goals and lead to greater restoration success. The Long Island Sound Study National Estuary Program conducted the first comprehensive look at coastal habitat health for the Long Island Sound Estuary. In this study we also reviewed landscape-scale habitat assessment progress within other coastal programs. Results can be applied to establish ecosystem health-oriented goals that improve habitat function and resilience across coastal areas.

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“…Within Virginia, populations of King and Clapper rails are declining (Wilson et al 2007;Correll et al 2016), and both species have been listed as Species of Greatest Conservation Need in the State of Virginia's 2015 Wildlife Action Plan (Virginia Department of Game and Inland Fisheries 2015). We recorded vocalizations of King and Clapper rails using autonomous recording units (ARUs) and evaluated the recordings with survey covariates to determine hourly variation in: 1) the proportion of sites at which individuals in the King and Clapper rail complex were detected, henceforth naive occupancy; 2) estimates of the number of individuals detected; and 3) the frequency of vocalizations.…”

mentioning

confidence: 99%