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Supplementary methods, results and JAGS code

Around fifteen thousand fieldworkers annually count breeding birds using standardized protocols in 28 European countries. The observations are collected by using country-specific and standardized protocols, validated, summarized and finally used for the production of continent-wide annual and long-term indices of population size changes of 170 species. Here, we present the database and provide a detailed summary of the methodology used for fieldwork and calculation of the relative population size change estimates. We also provide a brief overview of how the data are used in research, conservation and policy. We believe this unique database, based on decades of bird monitoring alongside the comprehensive summary of its methodology, will facilitate and encourage further use of the Pan-European Common Bird Monitoring Scheme results. The Pan-European Common Bird Monitoring Scheme database is organised into five datasets: (1) European species indices, (2) European species trends, (3) European species trends for three short periods, (4) a list of details on the national monitoring schemes and (5) a matrix of countries providing data for population size estimates of individual species. Moreover, national-level species indices and uncertainty estimates are also available in the PECBMS database. Due to specific privacy ownership rights, the most recent (2016-2017) data from Spain (10.5281/zenodo.4590140) and Cyprus (10.5281/zenodo.4590189) are under Restricted Access and researchers interested in these most recent updates are required to provide a brief description of the data use. The Austrian and Portuguese datasets are publicly available but researchers using these datasets are kindly requested to notify the national scheme coordinators of their use. A list of regularly updated contacts to all national scheme coordinators is provided at the PECBMSwebsite (https://pecbms.info/country/). We aim to maintain the PECBMS database with annual updates. The annual updates will be available through the PECBMS database deposited at this Zenodo repository to ensure long-term public availability of the data. Updates on data acquisiton and data processing in the dataset released in 2021 are available from:https://pecbms.info/what-is-new-in-2021-data-update/ Updates on data acquisiton and data processing in the dataset released in 2022 are available from:https://pecbms.info/what-is-new-in-2022-data-update/ &nbsp

Hosted by the Flanders Marine Institute, the Joint ICES/OSPAR/HELCOM Working Group on Seabirds met in Ostende, Belgium, 1–5 October 2018. The meeting was co-chaired by Morten Frederiksen, Ian Mitchell and Volker Dierschke, and was attended by 15 members representing 11 countries. Following the tradition of the preceding meetings, the objectives of the meeting were to develop and implement indicators for seabirds under the Marine Strategy Framework Directive (MSFD), as well as to review and discuss seabird-related issues relevant for human uses of the sea. The meeting con-sisted of a series of interconnected workshops, where subgroups with floating mem-bership discussed Terms of Reference. Report chapters were drafted by Term of Reference leads and collated by the chairs.Further refinements of the existing indictor for breeding productivity in OSPAR were discussed. The suggested approach uses matrix population models to assess the impact of the observed level of breeding productivity on population growth rate, and relates the projected growth rate to IUCN criteria for species red-listing.Links between trends in population abundance (HELCOM) and potential drivers were explored. Preliminary results are complex and require further interpretation.A combined mid-winter aerial survey of the offshore Baltic was carried out in early 2016. The data have been collated, but results are not ready yet.The group discussed integration rules for GES assessments of birds under MSFD, both within and across species. ICES workshops in 2018 resulted in advice on these rules. JWGBIRD mostly agree with this advice, but propose a few changes.JWGBIRD reviewed the UK national assessment of seabirds under MSFD, and made suggestions for further development of indicators.A reporting template for the periodic assessments of OSPAR Threatened and/or De-clining Species and Habitats was tested for the black-legged kittiwake.The group reviewed the progress so far on assessing bycatch mortality of marine birds in the NE Atlantic. The main limitation currently is the near absence of regular moni-toring data on bycatch of birds. This also hampers the definition of threshold values for the MSFD indicator D1C1. The information collated by JWGBIRD will be used to inform a joint OSPAR-HELCOM workshop to examine possibilities for developing in-dicators for incidental by-catch of birds and marine mammals, planned for September 2019.JWGBIRD provided input to the HELCOM indicator review process as well as to the HELCOM workshop on migratory waterbirds in November 2018.

Aquest estudi analitza les diferències de riquesa d’espècies d’ocells en zones agrícoles de Letònia amb diferent estructura del paisatge, composició d’hàbitats i intensitat d’explotació, així com els canvis en la riquesa d’espècies i abundància d’ocells comuns en zones agrícoles de Letònia durant els darrers deu anys. Els comptatges d’ocells es van realitzar dues vegades per temporada des de 1995 en 160 punts de comptatge permanents situats en quatre àrees d’estudi que representen diferents regions, paisatges i pràctiques agrícoles. Es van establir dues àrees d’estudi amb uns altres 80 punts de comptatge en 2003 per garantir una millor cobertura espacial i per cobrir els paisatges que abans estaven insuficientment representats. Es van analitzar també els tipus d’hàbitats i els elements del paisatge en una zona circular amb un radi de 200 metres al voltant del punt de comptatge mentre que les variables de paisatge general es van obtenir a partir de capes de SIG amb CORINE Landcover. La riquesa d’espècies (nombre d’espècies registrades per punt) va diferir significativament entre les regions així com l’estructura del paisatge, la intensificació agrícola i els tipus d’hàbitat dominant. Encara que la riquesa d’espècies a les zones agrícoles de Letònia van augmentar durant els últims 10 anys, hi va haver diferències regionals. L’augment més pronunciat en la riquesa d’espècies es va observar a l’àrea d’estudi amb la menor intensitat d’explotació i abandonament dels camps de cultiu, mentre que l’àrea d’estudi amb un major augment de superfície de terres cultivables va experimentar una disminució en la riquesa d’espècies. Les tendències i els índexs de més de 34 espècies registrades amb freqüència mostren que hi ha una tendència general d’augment per a la majoria de les espècies forestals i arbustives generalistes a causa de l’augment de terres de cultiu amb arbust. En el cas de les zones que no eren estrictament zones agrícoles només aquelles espècies associades a les zones de guaret van augmentar la seva riquesa mentre que aquelles associades a pastures i zones humides es van reduir.