Kirtland's Warblers in Anthropogenically Disturbed Early-Successional Habitats on Eleuthera, the Bahamas

Wunderle, Joseph M.; Currie, David J.; Helmer, Eileen H.; Ewert, David N.; White, Jennifer Duffield; Ruzycki, Thomas S.; Parresol, Bernard R.; Kwit, Charles

doi:10.1525/cond.2010.090134

Cited by 31 publications

(45 citation statements)

References 30 publications

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“…Resource tracking over space and time has previously been documented on a population level by demonstration of changes in bird density that correspond to changes in resources, particularly in frugivorous birds (Johnson and Sherry 2001, Renton 2001, Telleria and Perez-Tris 2003, Borgmann et al 2004, Brown and Sherry 2006a. But demonstration of resource tracking by individually marked birds has only rarely been done (Wunderle et al 2010), despite the importance of individual-based studies for revealing the mechanism behind seasonal changes in density.…”

Section: Discussionmentioning

confidence: 99%

“…Site-persistence behavior is known to vary across habitat types (Strong and Sherry 2000;Wunderle and Latta 2000;Latta andFaaborg 2001, 2002;Latta et al 2003;Wunderle et al 2010), and food availability has been proposed as a primary determinant of this variation Holmes 1996, Sherry et al 2005). However, the movements of emigrants have rarely been tracked, and only a few studies have shown that individuals are less sitepersistent in areas of low food availability Sherry 2001, Latta andFaaborg 2002).…”

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confidence: 99%

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Influence of Moisture and Food Supply on the Movement Dynamics of a Nonbreeding Migratory Bird (Parkesia noveboracensis) in a Seasonal Landscape

Smith

Reitsma

Marra

2011

The Auk

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We radiotracked Northern Waterthrushes (Parkesia noveboracensis) in four habitats in Puerto Rico during two winters (i.e., January-April) in 2003 and 2004 to determine the ecological determinants of diurnal space use and overwinter sitepersistence in this species. The majority of birds (69%) were sedentary and used a contiguous area within a single habitat over the winter period. A smaller percentage (31%) initially used a contiguous area within a single habitat but then permanently moved from that area to another disjunct location (mean = 418 m). Most of these movements were out ofthe two habitats (dry forest and Black Mangrove) that became the driest from January to mid-March and into wetter mangrove areas. The primary determinants of movement probability were moisture and food availability on each bird's home range. Foraging areas of birds that eventually moved were drier and had lower food availability than areas used by site-persistent individuals. The sites that these itinerant birds moved to were wetter and had higher food availability, which suggests that individuals moved in response to changing resources. Our results (1) indicate that habitats used by this species differ in suitability and (2) support previous findings that turnover rates within a habitat could serve as an indicator of habitat quality. The ability to predict behavioral responses of individuals to habitat conditions that vary across space and time is essential for understanding individual and population responses to habitat loss and the effects ofa changing climate in the New World tropics. Influencia de la Humedad y del Suministro de Alimentos sobre las Dinámicas de Movimiento de un Ave Migratoria No Reproductiva {Parkesia noveboracensis) en un Paisaje EstacionalRESUMEN.-Seguimos mediante transmisores de radio a individuos de Parkesia noveboracensis en cuatro ambientes en Puerto Rico durante dos inviernos (i.e., enero-abril) en 2003 y 2004 para establecer los determinantes ecológicos del uso del espacio diurno y la persistencia en sitios de invernada en esta especie. La mayoría de las aves (69%) fueron sedentarias y usaron un área contigua dentro de un único ambiente a lo largo del período invernal. Un porcentaje más pequeño (31%) usó inicialmente un área contigua dentro de un único ambiente pero luego se movió de modo permanente desde esta área a otro sitio disyunto (media = 418 m). La mayoría de estos movimientos fueron hacia afuera de los dos ambientes (bosque seco y manglar negro) que se tornaron los más secos desde enero hasta mediados de marzo y hacia áreas de manglar más húmedas. Los determinantes primarios de la probabilidad de movimiento fueron la humedad y la disponibilidad de alimento en el ámbito de hogar de cada ave. Las áreas de forrajeo de las aves que eventualmente se movieron fueron más secas y tuvieron menor disponibilidad de alimentos que las áreas usadas por individuos que persistieron en los sitios. Los sitios a los que estas aves itinerantes se movieron fueron más húmedos y tuvieron mayor disponibilidad de alimento...

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Influence of Moisture and Food Supply on the Movement Dynamics of a Nonbreeding Migratory Bird (Parkesia noveboracensis) in a Seasonal Landscape

Smith

Reitsma

Marra

2011

The Auk

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“…Studies were initiated on the island of Eleuthera in the central Bahamas to characterize the KIWA's winter habitat [58] and to determine whether the warblers were susceptible to declines in food resources [59]. Wunderle and collaborators predicted that the KIWAs would be susceptible to food resource declines because of their use of drought-prone habitats on shallow soils on limestone substrates [58] in the dry season of October-April and especially during the driest period in March and April [60], just prior to vernal migration. Moreover, these late-winter droughts are not uncommon in the Caribbean and Middle America, where they have been found to affect migrant body condition [61], as also documented in Guánica [47].…”

Section: Winter Rainfall Effects On Kirtland's Warblers In the Bahamamentioning

confidence: 99%

“…Habitats situated on sites with a shallow freshwater table could be especially important for providing "refugia" for the warblers during late winter droughts. These habitats have been characterized as anthropogenically-disturbed early successional sites (3-28 years post-disturbance) with an abundance of fruit [58,59].…”

Section: Winter Rainfall Effects On Kirtland's Warblers In the Bahamamentioning

confidence: 99%

The Plight of Migrant Birds Wintering in the Caribbean: Rainfall Effects in the Annual Cycle

Wunderle

Arendt

2017

Forests

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Here, we summarize results of migrant bird research in the Caribbean as part of a 75th Anniversary Symposium on research of the United States Department of Agriculture Forest Service, International Institute of Tropical Forestry (IITF). The fate of migratory birds has been a concern stimulating research over the past 40 years in response to population declines documented in long-term studies including those of the IITF and collaborators in Puerto Rico's Guánica dry forest. Various studies indicate that in addition to forest loss or fragmentation, some migrant declines may be due to rainfall variation, the consequences of which may carry over from one stage of a migrant's annual cycle to another. For example, the Guánica studies indicate that rainfall extremes on either the temperate breeding or tropical wintering grounds affect migrant abundance and survival differently depending on the species. In contrast, IITF's collaborative studies of the migrant Kirtland's Warbler (Setophaga kirtlandii) in the Bahamas found that late winter droughts affect its annual survival and breeding success in Michigan. We review these IITF migrant studies and relate them to other studies, which have improved our understanding of migrant ecology of relevance to conservation. Particularly important is the advent of the full annual cycle (FAC) approach. The FAC will facilitate future identification and mitigation of limiting factors contributing to migrant population declines, which for some species, may be exacerbated by global climate change.

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“…Site-selection and site-preparation recommendations have improved species composition and habitat structure in warbler habitats (Kashian et al 2001, Houseman and Anderson 2002, Probst and DonnerWright 2003. On the wintering grounds, research has improved the understanding of habitat use and the management of that habitat (Wunderle et al 2010). The success of the recovery program has depended on a strong interaction between applied research and species' management that allowed for dynamic management responses to stochasticity in the environment.…”

Section: Special Section Special Sectionmentioning

confidence: 99%

Using Conservation Management Agreements to Secure Postrecovery Perpetuation of Conservation-Reliant Species: The Kirtland's Warbler as a Case Study

2012

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Kirtland's warbler is one of many conservation-reliant species listed under the Endangered Species Act (ESA). This species has met recovery goals, but removing it from the protections of the ESA is problematic because of its reliance on ongoing conservation. We define conservation management agreements (CMAs) and describe how they may provide a mechanism to protect conservation-reliant species after delisting. We suggest that CMAs should include four major elements: (1) a conservation partnership capable of implementing management actions at conservation-relevant scales, (2) a conservation management plan based on the management actions in the species' successful recovery plan, (3) sufficient financial resources to provide the required conservation management, and (4) legal enforcement. We use the efforts of theKirtland's Warbler Recovery Team as a case study of the application of CMAs to build and maintain public and private partnerships to ensure continuing management for this species after delisting.

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Kirtland's Warblers in Anthropogenically Disturbed Early-Successional Habitats on Eleuthera, the Bahamas

Cited by 31 publications

References 30 publications

Influence of Moisture and Food Supply on the Movement Dynamics of a Nonbreeding Migratory Bird (Parkesia noveboracensis) in a Seasonal Landscape

Influence of Moisture and Food Supply on the Movement Dynamics of a Nonbreeding Migratory Bird (Parkesia noveboracensis) in a Seasonal Landscape

The Plight of Migrant Birds Wintering in the Caribbean: Rainfall Effects in the Annual Cycle

Using Conservation Management Agreements to Secure Postrecovery Perpetuation of Conservation-Reliant Species: The Kirtland's Warbler as a Case Study

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