Scaling up ideals to freedom: are densities of red knots across western Europe consistent with ideal free distribution?

Quaintenne, Gwenaël; Gils, Jan A. van; Bocher, Pierrick; Dekinga, Anne; Piersma, Theunis

doi:10.1098/rspb.2011.0026

Cited by 38 publications

(43 citation statements)

References 59 publications

(117 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, the IDD tends to receive more support than the IFD (reviewed by Rodenhouse et al 1997, Piper 2011). Yet, there is a growing body of evidence suggesting that the IFD can indeed apply to birds (Weidinger 2000, Sebastian-Gonzalez et al 2010, Quaintenne et al 2011 and many other taxa (Beckmann and Berger 2003, Rieger et al 2004, Haugen et al 2006, Morris and MacEachern 2010.…”

Section: Resultsmentioning

confidence: 99%

Experimental evidence for an ideal free distribution in a breeding population of a territorial songbird

Haché¹,

Villard²,

Bayne³

2013

Ecology

View full text Add to dashboard Cite

Abstract. According to the ideal despotic distribution (IDD), dominant individuals gain a fitness advantage by acquiring territories that are of higher quality, thereby forcing other individuals into lower quality habitat. In contrast, the ideal free distribution (IFD) predicts that local density is a function of habitat quality, but that individuals achieve the same fitness in different habitat types as a result of density-dependent variation in territory size. Although the IFD represents an alternative, population dynamics of territorial species are generally expected to be driven by an IDD. We tested the predictions of IFD and IDD by monitoring the demographic response of the Ovenbird (Seiurus aurocapilla) to selection harvesting (30-40% tree removal) during the first five years postharvest in five pairs of 25-ha study plots, each comprising a control (undisturbed) and a treatment (harvested plot). In the first year following harvesting, Ovenbird territory size increased in treatment plots relative to controls, whereas density, productivity per unit area, and the abundance of litter invertebrates decreased. Treatment effects declined consistently as stands regenerated, and most effects were no longer significant by the fifth year postharvest. However, there was no treatment effect on daily nest survival rate nor on per capita productivity. These results are consistent with the IFD, whereby similar per capita productivity is achieved across habitat types through density adjustments facilitated by changes in territory size. To our knowledge, this is the first study providing evidence for an IFD in a territorial bird species.

show abstract

Section: Resultsmentioning

confidence: 99%

Experimental evidence for an ideal free distribution in a breeding population of a territorial songbird

Haché¹,

Villard²,

Bayne³

2013

Ecology

View full text Add to dashboard Cite

show abstract

“…Large-scale variation in conditions across sites results in different energy costs and benefits across the migratory range (Quaintenne et al 2011). Carry-over effects (i.e., events that occur in one season but affect individual success in following seasons) may play an important role in population dynamics (Norris 2005), with individuals selecting pre-migratory staging areas at better sites being more likely to attain higher body condition prior to departure and thus better survival and possibly higher breeding success (Marra et al 1998;Smith and Moore 2003;Alves et al 2013).…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Why fly the extra mile? Using stress biomarkers to assess wintering habitat quality in migratory shorebirds

et al. 2016

View full text Add to dashboard Cite

Migratory birds make decisions about how far to travel based on cost-benefit trade-offs. However, in many cases the net effect of these trade-offs is unclear. We sought to address this question by measuring feather corticosterone (CORTf), leucocyte profile, avian malaria parasite prevalence and estimating fueling rates in three spatially segregated wintering populations of the migratory shorebird ruddy turnstone Arenaria interpres during their stay in the winter habitat. These birds fly from the high-Arctic breeding ground to Australia, but differ in that some decide to end their migration early (Broome, Western Australia), whereas others travel further to either South Australia or Tasmania. We hypothesized that the extra costs in birds migrating greater distances and overwintering in colder climates would be offset by benefits when reaching their destination. This would be evidenced by lower stress biomarkers in populations that travel further, owing to the expected benefits of greater resources and improved vitality. We show that avian malaria prevalence and physiological stress levels were lower in birds flying to South Australia and Tasmania than those overwintering in Broome. Furthermore, our modeling predicts that birds in the southernmost locations enjoy higher fueling rates. Our data are consistent with the interpretation that birds occupying more costly wintering locations in terms of higher migratory flight and thermoregulatory costs are compensated by better feeding conditions and lower blood parasite infections, which facilitates timely and speedy migration back to the breeding ground. These data contribute to our understanding of cost-benefit trade-offs in the decision making underlying migratory behaviour.

show abstract

“…For many migratory species, distribution ranges span large geographic areas, encompassing very different environmental conditions (Newton 2008). Large-scale variation in local weather conditions (Castro et al 1992, Ho¨tker 2002 and in the quality and quantity of food resources (van Gils et al 2005, Mathot et al 2007) can result in differing energy costs and benefits across the range (Quaintenne et al 2011). The conditions experienced during the winter season can also carry over into subsequent stages of the annual cycle (Gill et al 2001a, Norris et al 2004, Gunnarsson et al 2005a.…”

Section: Introductionmentioning

confidence: 99%

Costs, benefits, and fitness consequences of different migratory strategies

Alves

Gunnarsson

Hayhow

et al. 2013

Ecology

111

134

View full text Add to dashboard Cite

Abstract. The relative fitness of individuals across a population can shape distributions and drive population growth rates. Migratory species often winter over large geographic ranges, and individuals in different locations experience very different environmental conditions, including different migration costs, which can potentially create fitness inequalities. Here we used energetics models to quantify the trade-offs experienced by a migratory shorebird species at locations throughout the nonbreeding range, and the associated consequences for migratory performance, survival, and breeding habitat quality. Individuals experiencing more favorable winter conditions had higher survival rates, arrived on the breeding grounds earlier, and occupied better quality breeding areas, even when migration costs are substantially higher, than individuals from locations where the energy balance on the wintering grounds was less favorable. The energy costs and benefits of occupying different winter locations can therefore create fitness inequalities which can shape the distribution and population-wide demography of migratory species.

show abstract

Scaling up ideals to freedom: are densities of red knots across western Europe consistent with ideal free distribution?

Cited by 38 publications

References 59 publications

Experimental evidence for an ideal free distribution in a breeding population of a territorial songbird

Experimental evidence for an ideal free distribution in a breeding population of a territorial songbird

Why fly the extra mile? Using stress biomarkers to assess wintering habitat quality in migratory shorebirds

Costs, benefits, and fitness consequences of different migratory strategies

Contact Info

Product

Resources

About