Corvid Survey Techniques and the Relationship Between Corvid Relative Abundance and Nest Predation

Luginbuhl, John M.; Marzluff, John M.; Bradley, Jeffrey E.; Raphael, Martin G.; Varland, Daniel E.

doi:10.1648/0273-8570-72.4.556

Cited by 83 publications

(83 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is difficult to infer generalizations from these results, but Marzluff et al (2000) suggested that old-growth stands used by murrelets for nesting might be best buffered by surrounding the stands with maturing, simple-structured forests in which there were relatively few predators. In the same study, Luginbuhl et al (2001) reported a strong negative correlation between survival of simulated murrelet eggs and corvid abundance at the landscape level (5-50 km 2 scale). Corvid abundance explained 69% of the variance in predation of simulated murrelet eggs.…”

Section: Predation Risk Relative To Fragmentation and Edgementioning

confidence: 74%

“…Predators of murrelets were summarised by Nelson (1997) and Hooper (2001), and much has been learned about predation risk by the experimental work in Washington and Oregon , Luginbuhl et al 2001 Corvids (ravens, crows and jays) are common nest predators of forest birds, and are probably the most frequent predators of Marbled Murrelet nests. On the Sunshine Coast, Manley (1999) found that 14 (67%) of 21 nesting attempts with known outcome had failed, and predation was responsible for 12 (86%) of the failures.…”

Section: Predationmentioning

confidence: 99%

“…An intensive experimental study in Washington and Oregon provides the strongest evidence for this view , Luginbuhl et al 2001). This 5-year study combined observations at simulated murrelet nests containing murrelet-sized plastic eggs, dummy chicks or live pigeon nestlings, experiments with captive mammals, and radio-tracking of a large sample of potential predators.…”

Section: Predationmentioning

confidence: 99%

“…A five-year study in Washington and Oregon, found that corvids, particularly Steller's Jays, were common along forest edges that bordered early-seral vegetation with berry-producing bushes , Luginbuhl et al 2001. Corvids, especially crows and ravens, were usually most common close to human activities, including towns, roadways, campgrounds, picnic areas, and refuse dumps.…”

Section: Distribution Of Predators Relative To Fragmentation and Edgementioning

confidence: 99%

“…The most intensive research on the likely impacts of forest structure and landscape contiguity on Marbled Murrelet nest predation has been done by Marzluff and associates in the Olympic Peninsula, Washington, and in Oregon , Luginbuhl et al 2001. They used painted plastic eggs and stuffed, dark-coloured chicken chicks to simulate the eggs and chicks of Marbled Murrelets, and placed these on high limbs (in likely sites for murrelet nests) in a range of different habitats, but primarily in Douglas-fir forests.…”

Section: Predation Risk Relative To Fragmentation and Edgementioning

confidence: 99%

See 4 more Smart Citations

Relating Microclimate to Epiphyte Availability: Edge Effects on Nesting Habitat Availability for the Marbled Murrelet

Rooyen

Malt²,

Lank

2011

Northwest Science

View full text Add to dashboard Cite

Section: Predation Risk Relative To Fragmentation and Edgementioning

confidence: 74%

Section: Predationmentioning

confidence: 99%

Section: Predationmentioning

confidence: 99%

Section: Distribution Of Predators Relative To Fragmentation and Edgementioning

confidence: 99%

Section: Predation Risk Relative To Fragmentation and Edgementioning

confidence: 99%

See 3 more Smart Citations

Relating Microclimate to Epiphyte Availability: Edge Effects on Nesting Habitat Availability for the Marbled Murrelet

Rooyen

Malt²,

Lank

2011

Northwest Science

View full text Add to dashboard Cite

Drought exacerbates negative consequences of high‐intensity cattle grazing in a semiarid grassland

Souther

Loeser

Crews

et al. 2020

Ecological Applications

View full text Add to dashboard Cite

Grasslands managed for grazing are the largest land‐use category globally, with a significant proportion of these grasslands occurring in semiarid and arid regions. In such dryland systems, the effect of grazing on native plant diversity has been equivocal, some studies suggesting that grazing reduces native plant diversity, others that grazing increases or has little impact on diversity. One impediment toward generalizing grazing effects on diversity in this region is that high levels of interannual variation in precipitation may obfuscate vegetative response patterns. By analyzing a long‐term data set collected over a 20‐yr period in a semiarid grassland, we explicitly evaluated the role of climate in regulating the effect of cattle grazing on plant communities, finding that climate interacted with grazing intensity to shape grassland communities. Community composition of plots that were intensively grazed varied considerably in response to climatic variation and native species richness was low relative to ungrazed and moderately grazed plots. Following a severe drought in 2002, exotic species richness rapidly increased in the high‐intensity grazing plots. While this pattern was mirrored in the other treatments, exotic species richness increased to a greater extent and was slower to return to pre‐drought levels in the high‐intensity grazing plots. Overall, moderate grazing, even compared to grazing cessation, stabilized grassland communities through time, increased resilience to drought, and maintained the highest levels of native plant diversity and lowest levels of exotic diversity. These findings suggest that grazing, at moderate levels, may support grassland resilience to climate change in semiarid regions. However, grazing that exceeds tolerances, particularly in combination with extreme climatic events, like drought, can alter plant composition over relatively long timescales and possibly increase invasibility by nonnative species.

show abstract

Land‐sharing vs. land‐sparing urban development modulate predator–prey interactions in Europe

Jokimäki

Suhonen

Benedetti

et al. 2020

Ecological Applications

View full text Add to dashboard Cite

Urban areas are expanding globally as a consequence of human population increases, with overall negative effects on biodiversity. To prevent the further loss of biodiversity, it is urgent to understand the mechanisms behind this loss to develop evidence‐based sustainable solutions to preserve biodiversity in urban landscapes. The two extreme urban development types along a continuum, land‐sparing (large, continuous green areas and high‐density housing) and land‐sharing (small, fragmented green areas and low‐density housing) have been the recent focus of debates regarding the pattern of urban development. However, in this context, there is no information on the mechanisms behind the observed biodiversity changes. One of the main mechanisms proposed to explain urban biodiversity loss is the alteration of predator–prey interactions. Using ground‐nesting birds as a model system and data from nine European cities, we experimentally tested the effects of these two extreme urban development types on artificial ground nest survival and whether nest survival correlates with the local abundance of ground‐nesting birds and their nest predators. Nest survival (n = 554) was lower in land‐sharing than in land‐sparing urban areas. Nest survival decreased with increasing numbers of local predators (cats and corvids) and with nest visibility. Correspondingly, relative abundance of ground‐nesting birds was greater in land‐sparing than in land‐sharing urban areas, though overall bird species richness was unaffected by the pattern of urban development. We provide the first evidence that predator–prey interactions differ between the two extreme urban development types. Changing interactions may explain the higher proportion of ground‐nesting birds in land‐sparing areas, and suggest a limitation of the land‐sharing model. Nest predator control and the provision of more green‐covered urban habitats may also improve conservation of sensitive birds in cities. Our findings provide information on how to further expand our cities without severe loss of urban‐sensitive species and give support for land‐sparing over land‐sharing urban development.

show abstract

Corvid Survey Techniques and the Relationship Between Corvid Relative Abundance and Nest Predation

Cited by 83 publications

References 22 publications

Relating Microclimate to Epiphyte Availability: Edge Effects on Nesting Habitat Availability for the Marbled Murrelet

Relating Microclimate to Epiphyte Availability: Edge Effects on Nesting Habitat Availability for the Marbled Murrelet

Drought exacerbates negative consequences of high‐intensity cattle grazing in a semiarid grassland

Land‐sharing vs. land‐sparing urban development modulate predator–prey interactions in Europe

Contact Info

Product

Resources

About