Browsing by Author "Ribes, Jordi"
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- New records and detailed distribution and abundance of selected arthropod species collected between 1999 and 2011 in Azorean native forestsPublication . Borges, Paulo A. V.; Gaspar, Clara; Crespo, Luís C.; Rigal, François; Cardoso, Pedro; Pereira, Fernando; Rego, Carla; Amorim, Isabel; Melo, Catarina; Aguiar, Carlos; André, Genage; Pereira, Enésima; Ribeiro, Sérvio P.; Hortal, Joaquín; Santos, Ana M. C.; Barcelos, Luís Miguel Duarte; Enghoff, H.; Mahnert, Volker; Pita, Margarida T.; Ribes, Jordi; Baz, Arturo; Sousa, António B.; Vieira, Virgilio; Wunderlich, Jörg; Parmakelis, Aristeidis; Whittaker, Robert J.; Quartau, José A.; Serrano, Artur R. M.; Triantis, Kostas A.BACKGROUND: In this contribution we present detailed distribution and abundance data for arthropod species identified during the BALA – Biodiversity of Arthropods from the Laurisilva of the Azores (1999-2004) and BALA2 projects (2010-2011) from 18 native forest fragments in seven of the nine Azorean islands (all excluding Graciosa and Corvo islands, which have no native forest left). NEW INFORMATION: Of the total 286 species identified, 81% were captured between 1999 and 2000, a period during which only 39% of all the samples were collected. On average, arthropod richness for each island increased by 10% during the time frame of these projects. The classes Arachnida, Chilopoda and Diplopoda represent the most remarkable cases of new island records, with more than 30% of the records being novelties. This study stresses the need to expand the approaches applied in these projects to other habitats in the Azores, and more importantly to other less surveyed taxonomic groups (e.g. Diptera and Hymenoptera). These steps are fundamental for getting a more accurate assessment of biodiversity in the archipelago.
- New records for the Azorean arthropod faunaPublication . Borges, Paulo A. V.; Enghoff, H.; Erber, D.; Ilharco, Fernando A.; Monserrat, V. J.; Quartau, José A.; Ribes, Jordi; Serrano, Artur R. M.; Vieira, Virgílio; Wunderlich, Joerg; Strassen, R. Z.A fauna de artrópodes das pastagens de três ilhas dos Açores (S. Maria, Terceira e Pico) foi alvo de uma amostragem detalhada usando várias técnicas de amostragem (armadilhas pitfall, aspirador entomológico VORTIS e colheitas directas). Um total de 63 espécies de insectos herbívoros sugadores, 65 espécies de insectos herbívoros mastigadores e 117 espécies de artrópodes predadores foram amostrados durante cinco períodos de amostragem cobrindo três estações do ano em 1994 (primavera, Verão e Outono) e duas em 1995 (primavera e Verão). A presente contribuição serve para listar 85 novidades: 22 espécies são novas para o arquipélago, sendo cinco delas (quatro de S. Maria e Uma da Terceira) endémicas; 63 espécies constituem novidade para S. Maria, 21 são novas para a Terceira e 28 são novas para O Pico. Para cada espécie apresenta-se alguns comentários sobre a sua distribuição e ecologia.
- A new subspecies of Orthotylus junipericola Linnavuori, 1965 (Insecta, Heteroptera) from the Azores.Publication . Ribes, Jordi; Borges, Paulo A. V.Orthotylus (Parapachylops) junipericola attilioi n.ssp. is described from Terceira (Azores), based on a single male specimen collected in the Azorean endemic tree Juniperus brevifolia. O. (Parapachylops) junipericola Linnavuori, 1965 is a “Rassenkreis” with seven known geographic races with an Atlanto-mediterranean distribution. O. (Parapachylops) junipericola attilioi n.ssp. is the eighth subspecies described from this species, being the most occidental taxon. The new subspecies, O. (Parapachylops) junipericola attilioi n.ssp., was sampled in a biodiversity hotspot from the Azores, Biscoito da Ferraria Natural Forest Reserve of “climax pattern of indigenous forest”.
- Ranking protected areas in the Azores using standardised sampling of soil epigean arthropodsPublication . Borges, Paulo A. V.; Aguiar, Carlos; Amaral, João; Amorim, Isabel R.; André, Genage; Arraiol, Anabela; Baz, Arturo; Dinis, Francisco; Enghoff, H.; Gaspar, Clara; Ilharco, Fernando A.; Mahnert, Volker; Melo, Catarina; Pereira, Fernando E. A. P.; Quartau, José A.; Ribeiro, Sérvio P.; Ribes, Jordi; Serrano, Artur R. M.; Sousa, António B.; Strassen, R. Z.; Vieira, Luís; Vieira, Virgílio; Vitorino, Álvaro; Wunderlich, JoergNineteen areas in seven of the nine Azorean islands were evaluated for species diversity and rarity based on soil epigean arthropods. Fifteen out of the 19 study areas are managed as Natural Forest Reserves and the remaining four were included due to their importance as indigenous forest cover. Four of the 19 areas are not included in the European Conservation network, NATURA 2000. Two sampling replicates were run per study area, and a total of 191 species were collected; 43 of those species (23%) are endemic to the archipelago and 12 have yet to be described. To produce an unbiased multiple-criteria index (importance value for conservation, IV-C) incorporating diversity and rarity based indices, an iterative partial multiple regression analysis was performed. In addition, an irreplaceability index and the complementarity method (using both optimisation and heuristic methods) were used for priority-reserves analyses. It was concluded that at least one well-managed reserve per island is absolutely necessary to have a good fraction of the endemic arthropods preserved. We found that for presence/absence data the suboptimal complementarity algorithm provides solutions as good as the optimal algorithm. For abundance data, optimal solutions indicate that most reserves are needed if we want that at least 50% of endemic arthropod populations are represented in a minimum set of reserves. Consistently, two of the four areas not included in the NATURA 2000 framework were considered of high priority, indicating that vascular plants and bird species used to determine NATURA 2000 sites are not good surrogates of arthropod diversity in the Azores. The most irreplaceable reserves are those located in older islands, which indicates that geological history plays an important role in explaining faunal diversity of arthropods in the Azores. Based both on the uniqueness of species composition and high species richness, conservation efforts should be focused on the unmanaged Pico Alto region in the archipelago’s oldest island, Santa Maria.