Geographical and environmental factors affecting the distribution of wintering black storks <i>Ciconia nigra</i> in the Iberian Peninsula

Cano, Luis Santiago; Pacheco, Carlos; Refoyo, Pablo; Tellería, José Luis

doi:10.1111/jav.00391

Cited by 13 publications

(14 citation statements)

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“…Since Pipits move to the Iberian Peninsula and the Maghreb from the North, it is possible that the number of individuals will decrease at the southern border of the winter range producing variation in abundance that will not reflect the actual differences in carrying capacity (Sexton et al 2009). This effect of migratory flyways on the abundance of wintering Meadow Pipits and other species has been detected elsewhere (Tellería et al 2009, Cano et al 2014. Habitat effects.…”

Section: Validation Of the Modelmentioning

confidence: 99%

“…However, predictions resulting from ring recoveries can give a skewed view of the actual distribution of birds (Busse 2001) so that the models must be validated through the use of independent data (Araujo & Guisan 2006). Despite the potential interest of such approaches to broaden the use of ring data banks, few studies have been carried out to validate this methodological approach (Tellería et al 2012, Cano et al 2014.…”

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Using ring records and field surveys to predict the winter distribution of a migratory passerine

2014

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Capsule Ring records can be used to predict spatial changes in habitat suitability in wintering grounds of migratory birds as shown by a case study with the Meadow Pipit (Anthus pratensis). Aims To forecast the winter distribution of the Meadow Pipit in the Iberian Peninsula and the Maghreb (1 700 000 km 2) by combining ring records and fields surveys. Methods We processed winter ring records with Maxent, a popular machine-learning technique used to predict the occurrence probability of species. We then tested whether the occurrence probabilities predicted by the model were significantly positively related to the actual abundance of the Pipit in Spain and Morocco. Results Occurrence probabilities provided by Maxent explained 6% of Pipit abundance distribution in partial least squares regression analyses. There was, in addition, a weak effect of geographical location (1.5%) and a strong effect of local vegetation (17.6%) on Pipit distribution. The occurrence probabilities were used to classify the winter range of the Meadow Pipit in sectors of high, medium and low suitability. The most suitable sector occupied 9% of the region (153 000 km 2) and was restricted to warm and moist lowlands where Pipits gather in grasslands. Conclusion These results support the potential usefulness of cartographic models derived from ring records to describe the wintering range of migratory birds.

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Section: Validation Of the Modelmentioning

confidence: 99%

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confidence: 99%

Using ring records and field surveys to predict the winter distribution of a migratory passerine

2014

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“…It has been suggested that this increase is attributable to climate change (Maclean et al 2008), but such a rapid expansion is more likely to be due to a combination of a number of other factors, such as lack of competitors in their favoured habitats. There is also the analogous history of the Black Stork in Spain (Ciconia nigra) as described by Alonso (2006) and Cano et al (2014); the species has expanded because of increases in suitable foraging habitats, such as rice fields, reservoirs and ponds. In addition, more birds are breeding outside the south, which means that more birds require wintering areas.…”

Section: Discussionmentioning

confidence: 92%

The potential impacts of changes in ecological networks, land use and climate on the Eurasian crane population in Estonia

et al. 2015

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Context The Eurasian crane (Grus grus) is an iconic and sensitive species. It is therefore necessary to understand its landscape ecology in order to determine threats. Objectives (1) To map the distribution of cranes and then model their habitat requirements in Estonia, linked to the current level of protection. (2) To determine the environmental characteristics of, and the habitats present in, sites utilized by the birds, and their sensitivity to change.Methods (1) The distribution of cranes was recorded by observation and by tracking individuals. A model of potential breeding sites was compared with the occurrence of the bird in Estonia and then linked to protected sites. (2) The seasonal distribution of the bird was overlaid with a European environmental classification and the CORINE land cover map. A model of climate change was also utilized. Results (1) A new map of European migration routes, wintering and stopover sites is presented. (2)The bird requires a habitat network, with wetlands being essential for nesting and roosting. The composition of habitats used for feeding varies according to geographical location. (3) In Estonia not all potential breeding sites are occupied and many existing sites are not protected. (4) Climate change could threaten populations in the south but could be beneficial in Estonia.Conclusions (1) The existing ecological network in Estonia is adequate to maintain a viable breeding population of the Eurasian crane. (2) Climate change could support the breeding of cranes but complicate their migration and wintering.

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“…For instance, the main role of temperature on the spatial patterning of seed-dispersing birds may result from their thermoregulatory costs (Swanson & Garland, 2009), which compel birds to cope with low temperatures by increasing feeding rates (Kwit et al, 2004) and/or avoiding the coldest wintering sectors (Carrascal, Villén-Pérez, & Palomino, 2016). The effect of latitude on bird distribution was also remarkable (Table 2), a pattern probably related to the increasing costs of reaching areas at the periphery of the main flyways and overwintering sector of the study area (Cano, Pacheco, Refoyo, & Tellería, 2014;Tellería et al, 2009). It is interesting to note the differences in the ways in which bird assemblages were constrained according to their vagrant behaviour.…”

Section: Constraints On the Large-scale Distribution Of Seed-dispermentioning

confidence: 95%

Constraints on fruit tracking by birds at the range edge

Tellería

2019

Journal of Biogeography

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Aims Biotic interactions may be disrupted at the range boundary if the involved species are rare in the most distant sectors. This study assesses fruit tracking by seed‐dispersing birds wintering on the border of the Palaearctic, a region where many species become scarcer before reaching the limits of their distribution in the Sahara. As vagrancy improves fruit tracking, this study tests if vagrant birds track fruit resources better than non‐vagrant birds and if their tracking ability is reduced at the range edge. Location The Iberian Peninsula and the Maghreb. Methods Seed‐dispersing passerines (O. Passeriformes) were counted in 134 sampling sites along a 2000‐km‐long latitudinal belt. Relationships between bird numbers and latitude, temperature, shrub cover and fruit abundance were explored by multivariate analyses. In addition, the habitat matching rule was used to assess the ability of birds to track fruit changes along the latitudinal belt. Results Fruit abundance and temperature were the main drivers of the distribution of vagrant birds (all of them migratory species) while for non‐vagrant birds (most of them sedentary species) distribution was weakly correlated to the study variables. Vagrant birds tracked the spatial–temporal variations in fruit abundance but showed a reduced ability to fit numbers to fruit abundance changes in southern sectors. Main conclusions Vagrant are migratory birds responsible for large‐scale tracking of fruit outputs but seems to face some constraints on fruit tracking at the far edge of the Palaearctic. As the movements of these birds southwards are declining due to climate warming effects, these results suggest a future weakening of their role as seed dispersers in the most peripheral areas of the Palaearctic.

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Geographical and environmental factors affecting the distribution of wintering black storks Ciconia nigra in the Iberian Peninsula

Cited by 13 publications

References 39 publications

Using ring records and field surveys to predict the winter distribution of a migratory passerine

Using ring records and field surveys to predict the winter distribution of a migratory passerine

The potential impacts of changes in ecological networks, land use and climate on the Eurasian crane population in Estonia

Constraints on fruit tracking by birds at the range edge

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