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- Refining the identification criteria for forma typica and brachycerca in exuviae of Boyeria irene (Odonata: Aeshnidae)Publication . Nunes, Luísa; Casanueva, Patricia; Santamaria, Tomás; Hernández, Maria Ángeles; Sánchez-Sastre, Luis Fernando; Campos, FranciscoIn female imagines of Boyeria irene, two forms are known according to the length of the cerci: forma brachycerca (short appendages) and f. typica (long appendages). Both forms are also recognisable in exuviae. Hitherto, no accurate measurements have been performed to distinguish between the two forms. Hence, we measured and analysed the absolute and relative length of the cerci in both sexes of exuviae from 11 populations originating from the centre and north of the Iberian Peninsula. We show that there are specimens intermediate between the two forms and that dimorphism is also present in males. The brachycerca form is more frequent in the north than in the centre of the Iberian Peninsula. Correct identification of both forms should always be based on accurate measurements of the length of the cerci.
- Uma expedição científica aos habitats tropicais dos polinizadoresPublication . Nunes, LuísaUma expedição científica aos habitats tropicais dos polinizadores.
- Patterns of variation in wing venation of Iberian Cordulegaster boltonii (Donovan, 1807) (Odonata: Cordulegastridae)Publication . Nunes, Luísa; Santamaria, Tomás; Casanueva, Patricia; Sánchez-Sastre, Luis Fernando; Ferreras-Romero, Manuel; Romero, Ángel; Campos, Francisco; Hernández, Maria ÁngelesSome structural characters, such as wing venation, have been used in odonates to differentiate taxa. In Cordulegaster boltonii, a species widely distributed throughout the western Palaearctic, the main characteristics of its wing venation have not been quantified until now. A six-variable analysis of wing venation (number of antenodal and postnodal cross-veins, number of cells in the anal triangle and in the anal loop) in specimens from several European countries was carried out. The results showed that: (a) females had a greater number of transversal veins and cells in the anal loop than males; (b) the values of these four variables were significantly lower in males from the Iberian Peninsula than in those from elsewhere; (c) within the Iberian Peninsula two groups of populations can be distinguished: one covers the north and the other the rest of the peninsula, the latter with two subgroups, one in the centre and one in the south and east. The number of cells in the anal loop is a valid variable for analyzing geographic differences in this species.
- Useful biometric variables in Iberian exuviae of Boyeria irene (Fonscolombe, 1838) (Odonata: Aeshnidae)Publication . Nunes, Luísa; Casanueva, Patricia; Hernández, Maria Ángeles; Campos, Francisco; Santamaria, TomásIn species of similar shape and size, biometric analyses make it possible to establish differences. Within one species, biometrics can help researchers to detect differences between populations and analyze their adaptations to environmental conditions. Until now little was known about the biometrics of the Iberian populations of Boyeria irene (Odonata: Aeshnidae), a large species living mainly in southern Europe. Eight biometric variables were studied in male and female exuviae of B. irene collected in three rivers of the Iberian Peninsula, with the objective of ascertaining which are the most suitable populations of this species to study. An analysis of principal components (PCA) shows that lengths of the epiproct, paraproct and prementum are the most influential in each of the three populations. The other variables (head width, body length, length of the gonapophyses, maximum and minimum width of the prementum) proved not to be relevant in this context.
- Avaliação da qualidade de vida do cágado-de-carapaça-estriada (Emys orbicularis L., 1758) nas ribeiras do Monte Barata : uma revisãoPublication . Garcia, Rita; Nunes, Luísa; Clara, B.R.G.A conservação da Emys orbicularis tem vindo a ser desenvolvida em várias zonas de Portugal, nomeadamente no Monte Barata. Nesse sentido, elaborou-se uma análise fitossociológica que poderá ser concluída com base nos dados recolhidos; análises à água que mostram que as ribeiras detêm uma boa qualidade da água; realizaram-se censos que nos permitiram depreender que a população de E. orbicularis no Monte Barata é pequena e análises dos dados meteorológicos que nos informaram sobre a atividade da espécie. Desta forma, estabelecemos possíveis ameaças e sugerimos novas medidas a adotar para que se possam criar melhores condições ao nível de habitat, alimentação e reprodução da espécie.
- Tejo Internacional: Guia de VisitaPublication . Almeida, C.A.M.; Neves, João Vasco; Monteiro, Fernando Queirós; Santos, Domingos; Quinta-Nova, L.C.; Nunes, Luísa; Reis, Carlos Domingues dos; Raposo, Daniel; Roque, NatáliaEm sintonia com os objetivos fixados aquando da criação do Parque Natural do Tejo Inernacional, em agosto de 2000, assume-se como propósito deste guia a apresentação de um instrumento de informação e orientação que potencie o respeito pelos valores intrínsecos do PNTI, bem como o usufruto e fruição equilibrada dos mesmos. Neste contexto procede-se a uma breve descrição caracterizadora do Território do Parque, informação relativa ao apoio à visitação, é ainda apresentado um elenco de espécies de fauna e flora.
- Variation of larval size and adult emergence period of Boyeria irene (Fonscolombe, 1838) (Odonata: Aeshnidae) in the Francia River of western SpainPublication . Casanueva, Patricia; Hernández, Maria Ángeles; Nunes, Luísa; Sánchez-Sastre, Luis Fernando; Campos, FranciscoBoyeria irene (Fonscolombe, 1838) is a large dragonfly common in rivers and streams in southern Europe, but it is little known about the biometrical variations of their populations. In this paper, we test whether the time of the emergence period of this species differs in the same river, whether the larval size varies during the emergence period, and whether the distinct size variations are associated with the different river sections. Results have revealed that 1) female exuviae are larger than those of males, 2) except for the paraproct length, the exuviae have similar size across the entire river length, 3) size of the exuviae is larger in the first period of emergence than in the second one. A difference in emergence duration across the three river sections has been recorded.
- Laboratório de Proteção VegetalPublication . Luz, J.P.; Silva, M.C.A.; Nunes, Luísa; Coutinho, J.P.Laboratório de Proteção Vegetal.
- Hymenoptera pollinator effect on environmentPublication . Anjos, O.; Gonçalves, Odete Catarino; Nunes, L.F.There are several studies reporting the evidence that pollinators are declining as a result of local and global environmental degradation. Operation Pollinator is an international biodiversity program, supported by Syngenta, to boost the number of pollinating insects on commercial farms. It works by creating specific habitats, tailored to local conditions and native insects. The aim of this work is to increase the ecological suitability of pollinator populations through improves food availability for pollinator employing strategies for surrounding landscape. Two cherry orchards, located in Fundão, Portugal, were studied: one was installed a patch meadow with flowery prairie with the purpose of increasing pollinator’s number; other with poor native biodiversity. It was identified the main groups of insects visiting the cherry blossoms and the surrounding flora, during the flowering cherry trees. This review was conducted through observation and analysis of pollen in pollinator’s nests, artificially placed in the orchards in order to evaluate the visiting flowers. There was a greater number of pollinating insects in the orchard with higher biodiversity and it was found that insects visited other flora along with the cherry blossoms. The Hymenoptera identified belong to genus: Andrena; Apis; Eucera; Tropinota; Anthophora; Osmia; Xylocopa. The orchard where haven’t been installed the patch meadow, shows a lower number of visiting insects as well as lower species variability. The increasing of pollinators protects the environment and increases the fruit production and quality. The findings of the sweeter fruit, with the increased number and diversity of insects leads to the conclusion that the environment benefits from the increase in pollinators with more balanced environment, it's a winning environment for everyone. The conservation of pollinator habitat can also enrich overall biodiversity and the ecosystem services, protect soil and water quality
- Carabid (Coleoptera) community changes following prescribed burning and the potential use of carabids as indicators species to evaluate the effect of fire management in Mediterranean regionsPublication . Nunes, Luísa; Silva, Israel; Pité, Marina; Rego, Francisco; Leather, Simon; Serrano, ArturThis study investigates the effects of prescribed burning on ground beetle (Coleoptera: Carabidae) communities in two different habitats, a pine forest stand in Northern Portugal and a shrubland in a central region that were fire treated in spring of 1998. These two ecosystems were considerably different in floristically as well as structurally. Pitfall trapping was performed for two years in the pine stand and three years in the shrubland. Species of dryer open habitats dominated after fire in the shrubland site while the pine stand habitat showed a more or less constant carabid community structure for all treatments. Some Carabid taxa such as species/subspecies like Chrysocarabus lateralis, Petrophilus brevipennis sousai, Macrothorax rugosus celtiberus and Steropus globosus ebenus may be considered as indicators for fire managed areas in Mediterranean ecosystems.
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