Forest structure and territory size relationship in the neotropical understorey insectivore<i>Henicorhina leucosticta</i>

Vargas, Luis Fernando Aragón; Sánchez, Natalie V.; Ávalos, Gerardo

doi:10.1017/s026646741000060x

Cited by 12 publications

(10 citation statements)

References 35 publications

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“…Because males primarily defend territories from conspecifics using song, we assumed that responding individuals were male and our experiment used the response of these territorial birds to playback of songs as a way of measuring species recognition. At the site where we conducted our field experiments, La Selva Biological Station in Costa Rica (see below), WBWW territories average 3.8 ha in size—territory size is dependent on the amount of leaf litter available for foraging [ 25 ]. WBWWs defend their territories using song, and respond aggressively to playback of local conspecific song [ 26 ].…”

Section: Methodsmentioning

confidence: 99%

Asymmetric Response of Costa Rican White-Breasted Wood-Wrens (Henicorhina leucosticta) to Vocalizations from Allopatric Populations

et al. 2015

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Divergence in song between allopatric populations can contribute to premating reproductive isolation in territorial birds. Song divergence is typically measured by quantifying divergence in vocal traits using audio recordings, but field playback experiments provide a more direct way to behaviorally measure song divergence between allopatric populations. The White-breasted Wood-Wren (Henicorhina leucosticta; hereafter “WBWW”) is an abundant Neotropical species with four mitochondrial clades (in Central America, the Darién, the Chocó and the Amazon) that are deeply divergent (~5–16% sequence divergence). We assessed the possibility that the WBWW as currently defined may represent multiple biological species by conducting both statistical analysis of vocal characters and field playback experiments within three clades (Central America, Chocó and Amazon). Our analysis of vocal traits revealed that Central American songs overlapped in acoustic space with Chocó songs, indicating vocal similarity between these two populations, but that Central American songs were largely divergent from Amazonian songs. Playback experiments in the Caribbean lowlands of Costa Rica revealed that Central American WBWWs typically responded aggressively to songs from the Chocó population but did not respond to playback of songs from the Amazonian population, echoing the results of the vocal trait analysis. This marked difference in behavioral response demonstrates that the songs of Central American and Amazonian WBWWs (but not Central American and Chocó WBWWs) have diverged sufficiently that Central American WBWWs no longer recognize song from Amazonian WBWWs as a signal to elicit territorial defense. This suggests that significant premating reproductive isolation has evolved between these two populations, at least from the perspective of the Central American population, and is consistent with the possibility that Central American and Amazonian populations represent distinct biological species. We conclude by advocating for the further use of field playback experiments to assess premating reproductive isolation (and species limits) between allopatric songbird populations, a situation where behavioral systematics can answer questions that phylogenetic systematics cannot.

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Section: Methodsmentioning

confidence: 99%

Asymmetric Response of Costa Rican White-Breasted Wood-Wrens (Henicorhina leucosticta) to Vocalizations from Allopatric Populations

et al. 2015

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“…Many species of understory insectivores associated with primary forests require high levels of environmental complexity (Stratford & Stouffer, 2013) and thicker edges (Laurance, 2004), which influence the distribution and abundance of habitats sheltering their prey (Sánchez et al, 2014). The availability of aerial leaf litter (i.e., fallen leaves trapped in understory vegetation) is higher in more complex forests, especially primary forests (Vargas, Sánchez & Ávalos, 2011). Aerial leaf litter represents the main foraging substrate for many understory insectivores and its abundance influences the location of foraging territories.…”

Section: Does the Highway Affect The Abundance And Distribution Of Unmentioning

confidence: 99%

“…Aerial leaf litter represents the main foraging substrate for many understory insectivores and its abundance influences the location of foraging territories. For instance, the abundance of the White-breasted Wood Wren, Henicorhina leucosticta, depends on increased canopy cover and leaf area index (Vargas et al, 2011;Sánchez et al, 2014), both higher in primary forests; these factors in turn are correlated with the availability of aerial leaf litter, and thus, the biomass of potential prey (which is higher in structurally complex, multilayered, primary forests). The primary forests of Las Palmas are thus associated with increased resources for understory insectivores (supporting species with larger weight, as reported here).…”

Section: Does the Highway Affect The Abundance And Distribution Of Unmentioning

confidence: 99%

“…Many understory insectivores establish long-term territories for foraging and reproduction (i.e., Vargas et al, 2011). The quality of the territory varies with arthropod abundance (i.e., availability of aerial litter) and the complexity of forest structure (Cintra & Cancelli, 2008) influencing the distribution and density of these species (Laurance, 2004), some of which could survive fragmentation as long as small corridors connect forest patches (i.e., Sánchez et al, 2014).…”

Section: Does the Highway Affect The Abundance And Distribution Of Unmentioning

confidence: 99%

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Effect of a major highway on the spatial and temporal variation in the structure and diversity of the avifauna of a tropical premontane rain forest

Ávalos

Bermúdez

2016

RBT

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Roads immersed in conservation areas will increase in number, size, and traffic over the next decade, and thus, understanding their effects on forest-dependent wildlife is crucial for improving current management practices and reducing the negative impacts of roads on sensitive species. We examined the influence of route 32 (a.k.a. Guápiles Highway) on temporal and spatial changes in the structure of the avifauna of Braulio Carrillo National Park, Costa Rica, a site crossed by this road along 25 km. The highway connects the capital city of San José with the Harbor of Limón in the Caribbean Sea (142 km). Although the road is narrow (12 m in width and comprised by two lanes along most of the route) it services over 1.5 million motor vehicles per year, 12 % are heavy trucks and trailers. We expected the highway to divide the avifauna, and thus to observe significant differences in species structure on opposite sides of the road. We described changes in bird diversity between wet and dry seasons at Las Palmas and Ceibo trails located on opposite sides of the highway (14 point counts per trail), and evaluated how abundance and diversity varied with road distance. Censuses took place during wet and dry seasons from 2002 to 2005. We listed 245 species and 6 035 observations during the 4-yr survey. Rare species dominated the avifauna (65 % of species < 5 observations), and species overlap between trails was high (Sorensen= 71 %; Morisita= 0.96). Species accumulation curves varied little among trails, yielding 190 species. Resident species represented 70 % of observations, followed by elevational (15 %) and long-distance migrants (1-2 %). Understory species were the most abundant (60 %) followed by canopy birds (30 %). Species turnover rate was 55 % between seasons, but species composition between trails remained homogeneous. Overall, birds were avoiding the road (abundance increased away from the road) although other diversity parameters (richness, dominance, Shannon index, and equitability) were not influenced by road proximity. Although the avifauna remained homogeneous on both sides of the road, which did not support the fragmentation hypothesis, the highway reduced the abundance and diversity of specialized understory insectivores associated with primary forests near the road. This highway will expand outside the National Park (from 2 to 4 lanes along 107 km from Río Frío to Limón) in the next years, which will increase traffic volume and road impacts within the Park. Roads are increasing across highly diverse tropical areas justifying the need for management practices based on the identification of sensitive groups. Rev. Biol. Trop. 64 (4): 1383-1399. Epub 2016 December 01.

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“…Como a estratificação florestal é favorecida ao longo dos anos no crescimento secundário (e.g., MANTOVANI, 1999;GUARIGUATA;OSTERTAG, 2001;) o elevado número de indivíduos de espécies dependentes do estrato médio pode indicar uma maior integridade neste estrato (e.g., WILLIS, 1979;GIRAUDO et al, 2008). No caso dos insetívoros de sub-bosque, enquanto alguns estudos demonstram que a oferta e distribuição de artrópodes pode influenciar a ocorrência destas aves no habitat florestal (e.g., BLAKE;HOPPES, 1986;ZANETTE et al, 2000;VARGAS et al, 2011) outros sugeriram que na verdade as condições ambientais no micro habitat é que determinam a ocorrência desta aves (WONG, 1986; MANHÃES; DIAS, 2011; STRATFORD; STOUFFER, 2013). Outro fator que pode influenciar na manutenção destas espécies nos remanescentes é a habilidade delas em se dispersar pela matriz não florestal (SEKERCIOGLU, 2002;ANTONGIOVANNI;.…”

Section: Métricas Selecionadasinterpretanto a Integridade Dos Remanesunclassified

A paisagem antrópica sob avaliação: a avifauna em remanescentes florestais, matrizes agrícolas e as implicações para a conservação

Alexandrino¹

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Forest structure and territory size relationship in the neotropical understorey insectivoreHenicorhina leucosticta

Cited by 12 publications

References 35 publications

Asymmetric Response of Costa Rican White-Breasted Wood-Wrens (Henicorhina leucosticta) to Vocalizations from Allopatric Populations

Asymmetric Response of Costa Rican White-Breasted Wood-Wrens (Henicorhina leucosticta) to Vocalizations from Allopatric Populations

Effect of a major highway on the spatial and temporal variation in the structure and diversity of the avifauna of a tropical premontane rain forest

A paisagem antrópica sob avaliação: a avifauna em remanescentes florestais, matrizes agrícolas e as implicações para a conservação

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