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Avian Research 2021年第1期12卷 118-123页

作者： marco gustin Alessandro Ferrarini Conservation Department BirdLifeLIPU(Lega Italiana Protezione Uccelli)Via Udine 343100 ParmaItaly

The Red-footed Falcon(Falco vespertinus)is a species of high international conservation *** analyzed its hunting behavior at the two largest colonies in Italy during the nestling *** accurate data-loggers,we tracked three adult Red-footed Falcons in June and July,2019 and collected 4703 GPS *** detected clear patterns of hovering and perching activity(HPA)in both time and *** occupied one-third of the Red-footed Falcons’day,and showed two peaks just after sunrise(between 35 and 40%of the monitoring time)and just before sunset(50‒60%)in both June and July,and minimum(20‒30%)at night and during the hottest time interval(10:00 a.m.‒4:00 p.m.).Almost 40%of HPA occurred within 50 m from *** findings,although preliminary,have important implications for the conservation of these two colonies that are located within two Natura 2000 *** detected spatio-temporal patterns of Red-footed Falcons’hunting behavior suggests the creation of two nested protection belts:the inner one is a narrow belt(up to 50 m from the two rows of trees that host the two colonies)with integral conservation,and hopefully increase the alfalfa crops and fallow land,and the outer belt(50 m‒2 km)with optimized agricultural activities.

关键词： Biotelemetry Falco vespertinus Hovering Italy Natura 2000 site Perching

A new general index of home range overlap and segregation:the Lesser Kestrel in Southern Italy as a case study

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Avian Research 2021年第1期12卷 108-117页

作者： Alessandro Ferrarini Giuseppe Giglio Stefania Caterina Pellegrino marco gustin Conservation Department LIPU-BirdLife Italy(Lega Italiana Protezione Uccelli)Via Udine 3/a43122 ParmaItaly

Background:There is increasing interest in evaluating home-range overlap(or,otherwise,segregation)between bird species,and between or within bird populations,to inform spatial *** far,studies of home-range overlap typically make use of comparisons between pairs of individuals,populations or species,and return a matrix of pairwise overlaps(e.g.,percent overlaps).However,when the number of individuals,populations or species to be compared is elevated,an overlarge overlap matrix is difficult to interpret from an ecological ***:We propose here a new,conceptually simple and computationally efficient index(general overlap index;GOI)for the ready computation within GIS of home range overlap of an arbitrarily large number(i.e.,n≥2)of individuals,populations or *** the number of home ranges to be compared,GOI always returns a single score between 0 and *** a case study,we applied our index to 24,074 GPS points of 10 Lesser Kestrels(Falco naumanni)in order to estimate within-colony and between-colony overlaps in two neighboring colonies in Southern ***:Within-colony overlap was elevated for both colonies(96.41%at Cassano delle Murge,n=5 individuals;81.38%at Santeramo in Colle,n=5 individuals),while between-colony overlap was low(19.12%;n=2 colonies)and,after a randomization procedure,more spatially-segregated than expected by ***:Modern biotelemetry offers huge amounts of data describing the space use of animal *** use of intuitive and straightforward indices,like GOI,can be useful to promptly extract ecological information from such an amount of data(*** change in space use over successive years,evaluating the reliability of various home-range estimators).

关键词： Between-colony overlap Falco naumanni Home range randomization Overlap estimator Spatial segregation Within-colony overlap

A new methodology for computing birds＇ 3D home ranges

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Avian Research 2018年第2期9卷 168-173页

作者： Alessandro Ferrarini Giuseppe Giglio Stefania Caterina Pellegrino Anna Grazia Frassanito marco gustin Conservation Department LIPU - BirdLife (Lega Italiana Protezione Uccelli) Via Udine 3/a 43122 Parma Italy Alta Murgia National Park Via Firenze 10 70024 Gravina in Puglia Bari Italy.

Background： So far, studies of avian space use are mostly realized in 2D, with the vertical dimension ignored. We propose here a new, relatively simple and computationally reasonable method for the estimation of volumetric （i.e. 3D） avian home ***： Through accurate GPS data-loggers, we collected 25,405 GPS points on Lesser Kestrels＇（Fdlco noumonni） space use during the nestling period in one main colony in *** applied our 3D home range estimator to the whole GPS dataset, and also separately to diurnal and nocturnal GPS ***： The 3D colony home range resulted equal to 28.12 km3. By considering daytime and night-time separately, the volumetric home ranges resulted considerably ***： Our 3D home range estimator, because of its intuitive and straightforward properties, can easily capi-talize on the datasets offered by modern biotelemetry （data-loggers, light detection and LIDAR sensors） and enhance conservation strategies for mitigating anthropogenic impacts on bird species. Its applications embrace, but are not limited to, more accurate estimates of collision risk with power lines, aircrafts and wind farms, and increased knowledge of birds＇space requirements in order to persist in their distribution areas.

关键词： Avian space use Biotelemetry GPS data-loggers Vertical dimension Volumetric home range

Multi-species habitat models highlight the key importance of flooded reedbeds for inland wetland birds: implications for management and conservation

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Avian Research 2019年第2期10卷 186-198页

作者： Michelangelo Morganti Milo Manica Giuseppe Bogliani marco gustin Federica Luoni Paolo Trotti Vincenzo Perin Mattia Brambilla Department of Earth and Environmental Sciences University of Pavia Department of Environmental Science and Policy University of Milan Conservation Department Lipu/BirdLife Italy Riserva Naturale ‘Torbiere del Sebino’ Riserva Naturale Regionale ‘Lago di Piano’ Casa della Riserva Fondazione Lombardia per l’Ambiente Settore Biodiversità ed Aree Protette MUSE Museo delle ScienzeSezione di Zoologia dei VertebratiCorso del Lavoro e della Scienza

Background: Inland wetlands are crucial for biodiversity conservation, especially in highly-urbanized landscapes. In the European Union, many wetlands are included in the EU ‘Natura 2000’ network, the main tool for biodiversity conservation over the continent, which requires the development of site-specific management plans. Clear and feasible recommendations are necessary to provide site managers with effective tools for the maintenance of biodiversity in these unstable environments. Birds are excellent umbrella species, therefore a management targeted at increasing habitat suitability for focal bird species would likely benefit broader wetland biological communities. Methods: During spring–summer 2017, we collected presence/absence data for 10 bird species of conservation interest at a site scale for 21 Natura 2000 sites. We also carried out a point count survey to detect presence/absence of four reedbed-dwelling species at 75 points. At the site level, we estimated landscape characteristics from regional GISlayers, whereas fine-scaled habitat composition was recorded on the field within a 100 m-buffer around the 75 points. We analysed the effect of the extent of different habitats on species’ occurrence probability by means of multi-species binomial multivariate adaptive regression splines (MARS) at both scales. We also run species-specific MARS models to compare their performance with those of multi-species models. Results: At the site scale, the extent of the reedbeds/mires was positively associated with the occurrence of all species of conservation concern. At the point-count scale, reedbed extent positively predicted species’ occurrence, but only in presence of patches of clear shallow water. Species-specific MARS models showed qualitatively similar results for some species, but generally were outperformed by multi-species ones. Conclusions: Multi-species MARS models confirmed to be an efficient tool in disclosing species-habitat relationships even for set of

关键词： Multivariate adaptive regression spline Natura 2000 Pre-Alpine belt Species-habitat relationship Umbrella species Urbanized landscape