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Annual Report CREAF 2016

(2017) Annual Report CREAF 2016. . : -.

The Critical Levels of Atmospheric Ammonia in a Mediterranean Holm-Oak Forest in North-Eastern Spain

Aguillaume, L., Avila, A., Pinho, P., Matos, P., Llop, E., Branquinho, C. (2017) The Critical Levels of Atmospheric Ammonia in a Mediterranean Holm-Oak Forest in North-Eastern Spain. Water, Air, and Soil Pollution. 228: 0-0.
Enlace
Doi: 10.1007/s11270-017-3286-8

Resumen:

Dry deposition and canopy uptake in Mediterranean holm-oak forests estimated with a canopy budget model: A focus on N estimations

Aguillaume, L., Izquieta-Rojano, S., García-Gómez, H., Elustondo, D., Santamaría, J.M., Alonso, R., Avila, A. (2017) Dry deposition and canopy uptake in Mediterranean holm-oak forests estimated with a canopy budget model: A focus on N estimations. Atmospheric Environment. 152: 191-200.
Enlace
Doi: 10.1016/j.atmosenv.2016.12.038

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Evaluating the reliability of species distribution models with an indirect measure of bird reproductive performance

Aizpurua O., Cantú-Salazar L., Martin G.S., Sardà-Palomera F., Gargallo G., Herrando S., Brotons L., Titeux N. (2017) Evaluating the reliability of species distribution models with an indirect measure of bird reproductive performance. Journal of Avian Biology. : 0-0.
Enlace
Doi: 10.1111/jav.01218

Resumen:

Measures of fitness such as reproductive performance are considered reliable indicators of habitat quality for a species. Such measures are, however, only available in a restricted number of sites, which prevents them from being used to quantify habitat quality across landscapes or regions. Alternatively, species presence records can be used along with environmental variables to build models that predict the distribution of species across larger spatial extents. Model predictions are often used for management purposes as they are assumed to describe the quality of the habitats to support a species. Yet, given that species are often present both in optimal and suboptimal areas, the use of data collected during the breeding season to build these models may potentially result in misleading predictions of habitat quality for the reproduction of the species, with potentially significant conservation consequences. In this study we analysed the relationship between fitness parameters informing on habitat quality for reproduction and predictions of species distribution models at multiple spatial scales using two independent sets of data. For 19 passerine bird species, we compared an indirect measure of reproductive performance (ratio of juveniles-to-adults) - obtained from Constant Effort Sites (CES) mist-netting data in Catalonia - with the predictions of models based on bird presence records collected during the Catalan Breeding Bird Atlas (CBBA). A positive relationship between the predictions derived from species distribution models and the reproductive performance of the species was found for almost half of the species at one or more spatial scales. This result suggests that species distribution models may help to predict habitat quality for some species over some extents. However, caution is needed as this is not consistent for all species at all scales. Further work based on species- and scale-specific approaches is now required to understand in which situations species distribution models provide predictions that are in line with reproductive performance. © 2017 Nordic Society Oikos.

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Managing stand density to enhance the adaptability of Scots pine stands to climate change: A modelling approach

Ameztegui A., Cabon A., De Cáceres M., Coll L. (2017) Managing stand density to enhance the adaptability of Scots pine stands to climate change: A modelling approach. Ecological Modelling. 356: 141-150.
Enlace
Doi: 10.1016/j.ecolmodel.2017.04.006

Resumen:

In the Mediterranean region most climatic forecasts predict longer and more intense drought periods that can affect tree growth and mortality over broad geographic regions. One of the silvicultural treatments that has gained currency to lessen the impacts of climatic change is the reduction of stand density by thinning. However, we lack information on how the response of forest stands to different thinning treatments will be affected by climate change, and on the post-thinning temporal dynamics of water balance, specifically blue and green water. We adopted a modelling approach to explore the long-term effects of different thinning intensities on forest dynamics and water balance under climate change scenarios, coupling an individual-based model of forest dynamics (SORTIE-ND) with a mechanistic model of soil moisture dynamics and plant drought stress. We used as a case study three Scots pine plots across a gradient of climatic conditions, and we assessed the effect of site, three climatic scenarios and eight thinning intensities on tree growth, stand productivity, tree drought stress and blue water. The best thinning intensity in terms of stand productivity was obtained when between 20 and 40% of the basal area was removed, whereas the final stand stock rapidly decreased at higher thinning intensities. Moreover, the decrease in final basal area occurred at lower thinning intensities the drier the site conditions. Moderate and heavy thinnings (>30%) doubled basal area increment (BAI) of the following years in all the plots, although the effect vanished after 30–40 years, independently of the site and climate scenario. As expected, thinning was simulated to have an overall positive effect on the blue water yield and tree water status, which increased and also tended to last longer for higher thinning intensities. However, the magnitude of this effect on tree water status was most dependent on the site and climatic scenario, as drier conditions generally raised stronger and longer lasting reductions in drought stress for a given thinning intensity. Furthermore, our results highlight the existence of a site- and climate-dependent trade-off between the gain in stand productivity and the improvement in tree water status obtained by thinning, particularly for moderate or heavy thinning intensities. Our simulations suggest that thinning is a useful management tool to mitigate climate change but strongly argue against the application of general recipes across sites and appeals for carefully taking into consideration local climatic trajectories for management planning. © 2017 Elsevier B.V.

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Four years of experimental warming do not modify the interaction between subalpine shrub species

Anadon-Rosell, A., Ninot, J.M., Palacio, S., Grau, O., Nogués, S., Navarro, E., Sancho, M.C., Carrillo, E. (2017) Four years of experimental warming do not modify the interaction between subalpine shrub species. Oecologia. 183: 1167-1181.
Enlace
Doi: 10.1007/s00442-017-3830-7

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Grazing and edaphic properties mediate soil biotic response to altered precipitation patterns in a semiarid prairie

Andrés, P., Moore, J.C., Cotrufo, F., Denef, K., Haddix, M.L., Molowny-Horas, R., Riba, M., Wall, D.H. (2017) Grazing and edaphic properties mediate soil biotic response to altered precipitation patterns in a semiarid prairie. Soil Biology and Biochemistry. 113: 263-274.
Enlace
Doi: 10.1016/j.soilbio.2017.06.022

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A spatial allocation procedure to model land-use/land-cover changes: Accounting for occurrence and spread processes

Aquilué, N., De Cáceres, M., Fortin, M.-J., Fall, A., Brotons, L. (2017) A spatial allocation procedure to model land-use/land-cover changes: Accounting for occurrence and spread processes. Ecological Modelling. 344: 73-86.
Enlace
Doi: 10.1016/j.ecolmodel.2016.11.005

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Changing patterns of fire occurrence in proximity to forest edges, roads and rivers between NW Amazonian countries

Armenteras, D., Sebastian Barreto, J., Tabor, K., Molowny-Horas, R., Retana, J. (2017) Changing patterns of fire occurrence in proximity to forest edges, roads and rivers between NW Amazonian countries. Biogeosciences. 14: 2755-2765.
Enlace
Doi: 10.5194/bg-14-2755-2017

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Thermal stratification drives movement of a coastal apex predator

Aspillaga, E., Bartumeus, F., Starr, R.M., López-Sanz, À., Linares, C., DIáz, D., Garrabou, J., Zabala, M., Hereu, B. (2017) Thermal stratification drives movement of a coastal apex predator. Scientific Reports. 7: 0-0.
Enlace
Doi: 10.1038/s41598-017-00576-z

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