Defining Quality of Red-Cockaded Woodpecker Foraging Habitat Based on Habitat Use and Fitness

Walters, Jeffrey R.; Daniels, Stephen; Carter, Jay H.; Doerr, Phillip D.

doi:10.2307/3802938

Cited by 71 publications

(104 citation statements)

References 26 publications

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“…Both males and females at SRS heavily used pine trees and at least 98% of all observations occurred there, similar to that reported by other studies (Ramey 1980;Zwicker and Walters 1999;Walters et al 2000Walters et al , 2002Rudolph et al 2007). I detected no difference between males and females in four of the groups and in all groups combined in use of different pine species.…”

Section: Discussionsupporting

confidence: 88%

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Red-cockaded Woodpecker Male/Female Foraging Differences in Young Forest Stands

Franzreb¹

2010

The Wilson Journal of Ornithology

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Section: Discussionsupporting

confidence: 88%

“…All researchers who have investigated individual tree selection have found that large old trees are preferred over smaller, younger ones (DeLotelle et al 1987, Jones and Hunt 1996, Hardesty et al 1997, Walters et al 2002. Age and size of pine trees are highly correlated until about age 80 (Platt et al 1988).…”

mentioning

confidence: 99%

Red-cockaded Woodpecker Male/Female Foraging Differences in Young Forest Stands

Franzreb¹

2010

The Wilson Journal of Ornithology

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“…The best available evidence, although not definitive, supports the idea that recruitment clusters placed within dispersal range of several existing groups are most likely to be occupied. Furthermore, when such recruitment clusters do get occupied the spatial clustering of the population is increased, and clustering is known to improve population dynamics and thereby population viability (Walters et al 2002a). Thus this strategy improves the spatial distribution of the population while increasing its size.…”

Section: Discussionmentioning

confidence: 99%

“…RCW territories are very large (Jackson 1994;Conner et al 2001;USFWS 2003), typically more than 80 ha in longleaf habitat in the Carolinas and Georgia (Hooper et al 1982;Epting et al 1995;Walters et al 2002a). …”

Section: Rationale and Backgroundmentioning

confidence: 99%

An experimental study of the impact of location on the effectiveness of recruitment clusters for Red-cockaded Woodpeckers at the Savannah River Site.

Walters¹,

Johnston²,

Crowder³

et al. 2008

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EXECUTIVE SUMMARYThis report summarizes results of a five-year study of red-cockaded woodpeckers (Picoides borealis) at the Savannah River Site (SRS) conducted by biologists from Virginia Tech, the Duke Marine Laboratory and the USDA Forest Service at SRS. This project is based on a previous study in which we showed that growth of the red-cockaded woodpecker (RCW) population at SRS likely was limited by poor dispersal success due to an unfavorable spatial distribution of recruitment clusters. The primary objective of the project was to test experimentally the hypothesis that the location of recruitment clusters relative to existing groups was limiting their rate of occupancy. A secondary objective was to evaluate the cost effectiveness of various elements of the SRS management plan for RCWs.Rates of occupation of two types of recruitment clusters, differing in their spatial relationship to existing woodpecker groups, were compared. Experimental clusters were within 2 km of three or more existing groups, whereas control clusters had no existing groups within 2 km of them. Eight recruitment clusters of each type were established in the winter of [2001][2002], and initial response to them was assessed in the RCW breeding season in 2002. Four of eight experimental recruitment clusters (50%) were occupied in the 2002 breeding season, whereas only one of eight control recruitment clusters (12%) was occupied. Those recruitment clusters that were occupied were replaced by new ones, so that ten recruitment clusters of each type were available for occupancy each breeding season, beginning in 2003. The rate of occupation in 2003 was lower than in 2002, but still higher for experimental clusters (30%) than for control clusters (0%). Rates of occupation fell to near zero after 2003: only one cluster of each type was occupied in 2004 and 2005 combined. At the end of the experiment, seven of the 18 experimental clusters that were constructed were occupied (39%), compared to two of the 11 control clusters (18%). The difference between treatments in occupancy is not statistically significant but the trend in the data supports the idea that placing recruitment clusters near existing groups increases occupancy rate.We predicted that placing recruitment clusters near existing groups would not only increase their rate of occupation, but also result in high rates of population growth and increased rates of transition from non-breeder to breeder status among juvenile females and helper males (due to their achieving breeding status by occupying such clusters). Our prior work showed these transition rates to be unusually low at SRS compared to other RCW populations. The expectation of enhanced population growth was not realized. The population increased by 11% (from 37 to 41 groups) in the first year of the study, a rate of growth similar to that during the period analyzed in our previous study (12% annual growth 1995-1998, from 18 to 25 groups) and the intervening years (14% annual growth 1998-2001, from 25 to 37 groups). However no ad...

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“…These changes have increased the amount of nesting habitat available to support population growth. They also have improved foraging habitat quality on many RCW territories, which based on previous research is expected to increase productivity and group size (Hardesty et al 1997;James et al 1997;Walters et al 2002c;Convery 2002). We proposed in our previous study that similar improvements in habitat quality were indeed resulting in increased group sizes on Eglin, which was particularly evident in plots that lacked recruitment clusters (Walters et al 2002a).…”

Section: Response To Management Techniquesmentioning

confidence: 99%

Studies of FAUNA at Eglin Air Force Base

Walkers¹,

Haas²,

Blanc³

et al. 2006

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. (From -To) REPORT DATE (DD-MM-YYYY) 01-07-2006 REPORT TYPE Annual DATES COVERED PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8. PERFORMING ORGANIZATION REPORT NUMBERVirginia Polytechnic Institute Blacksburg, Virginia 24060-3325 SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S) U.S. Army Medical Research and Materiel Command Fort Detrick, Maryland 21702-5012 SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION / AVAILABILITY STATEMENTApproved for Public Release; Distribution Unlimited SUPPLEMENTARY NOTES ABSTRACTSee Executive Summary Page 2 SUBJECT TERMSNo subject terms provided. ACKNOWLEDGMENTSWe thank the Department of Defense, Natural Resources Division (Jackson Guard), Eglin Air Force Base, for funding this project. Personnel at Eglin were uniformly supportive of and helpful with our work. We thank Range Control for working with us on a daily basis to provide safe access to research sites. We are especially grateful to the members of Jackson Guard for their willingness and ability to coordinate management of the base with our research activities, and for their contributions to the research. The work described here was truly a joint venture between our university research team and Jackson Guard. Several members of Jackson Guard deserve special mention. Dennis Teague contributed to collection of field data. First Carl Petrick and then Bruce Hagedorn provided leadership and input to study design, and secured funding for the project each year. In the early years of the project Bruce managed much of the data and facilitated coordination between our research and other management activities on Eglin. Kathy Gault led our university research team in the early years of the project and continued to contribute to data collection and performance of management activities, as well as managing some of the data and coordinating our work with base natural resource management, after moving to Jackson Guard. Bruce and Kathy participated in annual reviews of population data and a variety of other activities, and generally contributed to the project on a daily basis.We are also indebted to o...

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Defining Quality of Red-Cockaded Woodpecker Foraging Habitat Based on Habitat Use and Fitness

Cited by 71 publications

References 26 publications

Red-cockaded Woodpecker Male/Female Foraging Differences in Young Forest Stands

Red-cockaded Woodpecker Male/Female Foraging Differences in Young Forest Stands

An experimental study of the impact of location on the effectiveness of recruitment clusters for Red-cockaded Woodpeckers at the Savannah River Site.

Studies of FAUNA at Eglin Air Force Base

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