A modelling approach to infer the effects of wind farms on landscape connectivity for bats     

Federica Roscioni  Hugo Rebelo  Danilo Russo  Maria Laura Carranza  Mirko Di Febbraro  Anna Loy 《Landscape Ecology》2014,29(5):891-903

Little is known about the potentially disrupting effects of wind farms on the habitat connectivity of flying vertebrates at the landscape scale. We developed a regional-scale model to assess the wind farm impact on bat migration and commuting routes. The model was implemented for the bat Nyctalus leisleri in a region of central Italy currently undergoing considerable wind farm development. A Species Distribution Model (SDM) for N. leisleri was generated using the MaxEnt algorithm based on 47 presence records (reduced to 19 after the autocorrelation procedure) and 10 environmental variables derived from topographic and land cover maps. We used the SDM to create a map of connectivity using the software UNICOR to identify potential commuting corridors (PCCs). The incidence of each wind farm on bat flight corridors was assessed by overlaying the existing (380) and planned (195) turbine locations onto the PCCs. The SDM was statistically robust (AUC > 0.8). Most of the corridors were concentrated in the western part of the region, which hosts the largest suitable areas for the species; most of the existing (54 %) and planned (72 %) wind farms interfered with important corridors connecting the western and the eastern parts of the region. Our results provide key information on the impact of the wind farm industry on biodiversity on a regional scale. The novel approach adopted, based on SDM and connectivity analysis, could be easily extended to other flying vertebrates and landscapes and constitutes a promising planning tool necessary for harmonizing the development of renewable energy infrastructures with issues of biodiversity conservation.  相似文献   

Assessment gaps and biases in knowledge of conservation status of fishes     

Imanol Miqueleiz  Monika Bohm  Arturo Hugo Ario  Rafael Miranda 《水产资源保护:海洋与淡水生态系统》2020,30(2):225-236

  相似文献   

It is the ambience,not the menu. Prey availability does not drive habitat selection by the endangered Pyrenean desman     

Amaiur Esnaola  Vanessa Mata  Aitor Arrizabalaga-Escudero  Jorge González-Esteban  Aitor Larrañaga  Hugo Rebelo  Arturo Elosegi  Joxerra Aihartza 《水产资源保护:海洋与淡水生态系统》2021,31(7):1859-1872

1. The Pyrenean desman (Galemys pyrenaicus) is an endangered stream-dwelling insectivore endemic to the Iberian Peninsula and the north of the Pyrenees. It favours riffles over slow habitats such as runs or pools, yet it is still unclear whether habitat preference is based on prey availability or on other factors, such as mechanical constraints on its hunting habits.
2. Desman diet and prey selection were analysed along the pristine Elama Stream and the slightly modified Leitzaran Stream in the Basque Country, Spain.
3. In each stream the prey consumed were identified by metabarcoding 94 desman faeces, and prey availability characterized from 10 Surber samples taken in each habitat type (riffles, runs and pools). Invertebrates were sorted and identified, the biomass of each taxon was calculated, and their DNA was also extracted, amplified using PCR, and sequenced to build a reference database.
4. Prey availability and diet varied between streams. Desmans positively selected shredders and invertebrates that live on the substrate, and selected against taxa that live in fine sediment, taxa with hard shells or those that are highly mobile. The diet of desmans was more selective in the Elama, the stream with better ecological status. Food availability did not differ among habitats, and therefore does not explain the preference of desmans for riffles; rather, mechanical constraints to deal with buoyancy and physical habitat heterogeneity were hypothesized to be the reason behind the habitat preference.
5. The results suggest that promoting the formation of riffles in streams can improve the situation of some desman populations living in degraded habitats.

  相似文献   

The evolutionary relationship between bere barley and other types of cultivated barley     

Drosou  Konstantina  Craig  Hayley  Palmer  Karren  Kennedy  Sandra L.  Wishart  John  Oliveira  Hugo R.  Civáň  Peter  Martin  Peter  Brown  Terence A. 《Genetic Resources and Crop Evolution》2022,69(7):2361-2381

Genetic Resources and Crop Evolution - We used genotyping-by-sequencing to investigate the evolutionary history of bere, the oldest barley variety still cultivated in Britain and possibly in all of...  相似文献   

Aridity and geochemical drivers of soil micronutrient and contaminant availability in European drylands     

Eduardo Moreno-Jiménez  Alberto Orgiazzi  Arwyn Jones  Hugo Saiz  Sara Aceña-Heras  César Plaza 《European Journal of Soil Science》2022,73(1):e13163

  相似文献   

White pine (Pinus strobus L.) regeneration dynamics at the species’ northern limit of continuous distribution     

Yadav Uprety  Hugo Asselin  Yves Bergeron  Marc J. Mazerolle 《New Forests》2014,45(1):131-147

The abundance of eastern white pine (Pinus strobus L.) has been significantly reduced across its distribution range over the past few centuries. The species’ regeneration dynamics is well documented in the centre of its range, but is poorly understood at the northern limit of continuous distribution. To address this knowledge gap, we quantified natural white pine regeneration in unmanaged mature stands, identified the most important variables influencing it, and evaluated the impact of damaging agents, namely white pine blister rust (Cronartium ribicola J.C. Fisch.), white pine weevil (Pissodes strobi Peck), and herbivory. We also quantified the influence of remnant stands and residual trees on the spatial distribution of regeneration in logged sites. The results reveal continuous but low recruitment in mature stands. The basal area of balsam fir (Abies balsamea (L.) Miller) had a strong negative effect on white pine regeneration. Regeneration was more abundant than expected on moister substrates, including moss, decaying wood and organic matter. White pine regeneration was noted in recently logged areas, where distance from remnant stands had a significant effect on the abundance of white pine regeneration. The northern limit of continuous distribution holds potential for white pine restoration, for example by preserving remnant white pine stands that can provide seed sources for natural regeneration in a shelterwood cut system, or in adjacent clearcut areas. This study illustrates that different management strategies should be used near northern range limits, where effects of site conditions and disturbance agents are different than in the center of a species’ range.  相似文献   

Swine castration with anesthesia investigation begins     

de Groot H 《Tijdschrift voor diergeneeskunde》2007,132(11):446-447

  相似文献   

"The quality and standards of the veterinary link in the chain of calves meat industry     

de Groot H 《Tijdschrift voor diergeneeskunde》2007,132(9):364-365

  相似文献   

Leishmania-specific isotype levels and their relationship with specific cell-mediated immunity parameters in canine leishmaniasis     

Rodríguez-Cortés A  Fernández-Bellón H  Ramis A  Ferrer L  Alberola J  Solano-Gallego L 《Veterinary immunology and immunopathology》2007,116(3-4):190-198

In the current retrospective study, Leishmania infantum-specific IgG, IgA and IgM levels were determined by ELISA in 106 untreated dogs with clinically-patent leishmaniasis (Sx) and in 171 clinically healthy dogs (Asx) from Spain to investigate the relationship between these Ig isotypes and clinical status. In addition, we studied if different Leishmania-specific humoral pattern exists between Asx dogs with and without cellular mediated immunity (CMI). Fifty-six dogs were assessed by means of lymphoproliferation assay (LPA), interferon production (IFN) and leishmanin skin test (LST), 71 dogs by means of both LPA and IFN and 44 only by LST. Both Sx and Asx dogs produced Leishmania-specific IgG, IgA and IgM antibodies, however the levels and proportion of positive dogs for each Ig isotype were significantly higher in Sx than in Asx ones (P<0.001). Analysis of immunological profiles determined for each cellular technique (positive and negative cellular response for each technique combined with positive or negative specific humoral response) showed that Asx dogs constituted a high heterogeneous group. No correlations were observed between CMI tests and specific IgG or IgM levels. However, a significant inverse correlation was demonstrated between specific IgA levels and LPA response (Spearman's r=-0.220; P=0.035). In general, the low correlation detected between CMI tests and isotype levels might indicate that the immune response is not strongly polarized in the majority of Asx dogs. Additionally, this study suggests that dogs developing T-cell response are probably able to avoid the dissemination of the parasite at least to mucosal surfaces and, as a consequence, to produce low or background specific IgA levels. Further studies are needed to investigate the relationship between specific IgA and parasite load, especially at mucosal site.  相似文献   

Genetic variability among elite red clover ( Trifolium pratense L.) parents used in Chile as revealed by RAPD markers     

Hugo Campos-de Quiroz  Fernando Ortega-Klose 《Euphytica》2001,122(1):61-67

Red clover (Trifolium pratense L.) is one of the main forage species of temperate regions. Cultivars of red clover are heterogeneous which makes their genetic analysis difficult. We applied RAPDs (Random Amplifed Polymorphic DNA) in order to assess the genetic relationship and levels of genetic variability existing among a group of 16 elite red clover parents organised in four subsets of 4 parents each. Out of 55 primers 21 provided reproducible results. A total of 135 reliable and polymorphic RAPD bands were detected which were used to estimate genetic distances among pair-wise combinations of elite parents. Nei and Li's similarity values ranged from 0.60 to 0.77, with a mean of 0.66, which reflects a rather high genetic variability among the genotypes evaluated. Lower levels of genetic variability, as detected by polymorphic loci and mean heterogeneity values, were detected in a subset of parents selected for resistance to the stem nematode. Cluster analyses resolved the different sets of parents in a manner consistent with what is known from their breeding origins. An Analysis of Molecular Variance detected substantial levels of variation within subsets of parents. RAPDs represent a valuable source of genetic information for red clover breeding programmes. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献