Influence of Food Abundance, Nest-Site Habitat, and Forest Fragmentation on Breeding Ovenbirds

Burke, Dawn M.; Nol, Erica

doi:10.2307/4089115

Cited by 408 publications

(337 citation statements)

References 20 publications

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“…Decreased prey abundance associated with forest fragmentation is a convenient hypothesis to explain insectivorous bird decline and has found some support by temperate studies like Burke & Nol (1998). However, this is now no longer widely accepted as newer tropical studies like Sekercioglu et al (2002) have found no link between arthropod abundance and fragmentation.…”

Section: Discussionmentioning

confidence: 99%

Do insectivorous bird communities decline on land-bridge forest islands in Peninsular Malaysia?

et al. 2010

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Abstract:To assess the impact of habitat fragmentation on tropical avian communities, we sampled lowland forest birds on six land-bridge islands and two mainland forest sites in Lake Kenyir, Peninsular Malaysia using timed point counts, hypothesizing that insectivorous birds are the worst affected guild. We used an information-theoretic approach to evaluate the effects of area, isolation, primary dietary guild (omnivore, frugivore and insectivore) and their interactions in predicting species richness, abundance and diversity. Our analysis showed that a model that considered the effects of area, dietary guild and their interaction best explained observed patterns of species richness. But a model considering both area and dietary guild best explained the variation in abundance. Notably, insectivorous birds were singled out as the dietary guild most sensitive to fragmentation, followed by frugivorous and omnivorous birds and hence provide support for our hypothesis. Assemblages of insectivorous birds were clearly depauperate on anthropogenic forest islands in Lake Kenyir and are consistent with forest fragmentation studies in the Neotropics. Given their specialized foraging ecology and diversity, conservation of intact communities of insectivorous bird guilds in Malaysia will be critical for maintaining predator-prey interactions in lowland tropical forests.

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Section: Discussionmentioning

confidence: 99%

Do insectivorous bird communities decline on land-bridge forest islands in Peninsular Malaysia?

et al. 2010

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“…However, our data indicates that for three species in the study area, the territory size did not vary between non-breeding and breeding seasons. The variation in the territory size can be related to food abundance (BURKER & NOL 1998), varying among different forest types and during the breeding season (STENGER & FALLS 1959) resulted of the territorial behavior and the trade-off between energy and predation risk (WIKTANDER et al 2001). In spite of variations in territory size registered for some species, STUTCHBURY & MORTON (2001) consider that in the tropics yearlong territory defense is common and adult survival high, so breeding vacancies may be scarce.…”

Section: Discussionmentioning

confidence: 99%

Territory size of three Antbirds (Aves, Passeriformes) in an Atlantic Forest fragment in southeastern Brazil

2006

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Territory size is an important ecological attribute of populations that has been considered a factor determines population density. Antbirds is a large group of mainly insectivorous Neotropical passerines, usually well represented in bird communities from forested landscapes in Neotropical region. Territory sizes for three Antbirds, Thamnophilus caerulescens (Vieillot, 1816) (Variable Antshrike), Dysithamnus mentalis (Temmink, 1823) (Plain Antvireo) e Pyriglena leucoptera (Vieillot, 1818) (White-shouldered Fire-eye), were mapped and their area estimated by the convex polygon method in a 50 ha forest fragment, in southeastern Brazil. The three species presented small territories of similar sizes (< 2 ha) both during the non-reproductive and the reproductive seasons of 2000-2001. Territories overlapped considerably among species but not intraspecifically. Territory sizes increased with body mass of the three species studied (P. leucoptera > T. caerulescens > D. mentalis). We failed to find any effect on territory size for the three species associated with forest edge or distance to the dirt road.

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“…All are sedentary small-to medium-sized insectivores, a group that is known to be declining worldwide (Sekercioglu et al 2004). Among passerines, insectivores are particularly vulnerable to habitat fragmentation and there is evidence that reduced nutrition may be a contributing factor in south-east Australia (Zannette et al 2000) and elsewhere (Burke & Nol 1998;Stratford & Stouffer 2001;Doherty & Grubb 2003;Zannette et al 2003;Suorsa et al 2004). Five of the eight species are listed as threatened and declining across their ranges, while three are widespread and secure (table 1).…”

Section: Methodsmentioning

confidence: 99%

Shifting latitudinal clines in avian body size correlate with global warming in Australian passerines

2009

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Intraspecific latitudinal clines in the body size of terrestrial vertebrates, where members of the same species are larger at higher latitudes, are widely interpreted as evidence for natural selection and adaptation to local climate. These clines are predicted to shift in response to climate change. We used museum specimens to measure changes in the body size of eight passerine bird species from south-eastern Australia over approximately the last 100 years. Four species showed significant decreases in body size (1.8 -3.6% of wing length) and a shift in latitudinal cline over that period, and a meta-analysis demonstrated a consistent trend across all eight species. Southern high-latitude populations now display the body sizes typical of more northern populations pre-1950, equivalent to a 78 shift in latitude. Using ptilochronology, we found no evidence that these morphological changes were a plastic response to changes in nutrition, a likely non-genetic mechanism for the pattern observed. Our results demonstrate a generalized response by eight avian species to some major environmental change over the last 100 years or so, probably global warming.

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Influence of Food Abundance, Nest-Site Habitat, and Forest Fragmentation on Breeding Ovenbirds

Cited by 408 publications

References 20 publications

Do insectivorous bird communities decline on land-bridge forest islands in Peninsular Malaysia?

Do insectivorous bird communities decline on land-bridge forest islands in Peninsular Malaysia?

Territory size of three Antbirds (Aves, Passeriformes) in an Atlantic Forest fragment in southeastern Brazil

Shifting latitudinal clines in avian body size correlate with global warming in Australian passerines

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