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Percorrer ESACB - Escola Superior Agrária por Domínios Científicos e Tecnológicos (FOS) "Ciências Naturais::Ciências Biológicas"
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- Altitudinal variation of wing length and wing area in Libellula quadrimaculata (Odonata: Libellulidae)Publication . Casanueva, Patricia; Sanz Requena, José-Francisco; Hernández, M. Ángeles; Ortega, Silvia; Nunes, Luisa; Campos, FranciscoThe area and length of the right fore and hind wings and the abdomen length were analysed in specimens from two Iberian populations of Libellula quadrimaculata Linnaeus, 1758, one on a plateau (782 m a.s.l.) and another in the mountains (1 909 m a.s.l.), with a view to ascertaining whether their morphometric characteristics vary with altitude. Allometric relationships in terms of length and area of the fore and hind wings of both populations were found. The wings are longer and have a greater area in plateau specimens whereas the length of the abdomen did not vary between populations. Between the populations there was an overlap in the wing length measurements. The significance of these parameters in aiding the dragonflies’ flight capacity and hence the effects on their lifestyle under different environmental conditions is discussed.
- Cordulegaster boltonii: la libélula tigre de los arroyosPublication . Casanueva, Patricia; Santamaria, Tómás; Nunes, Luisa; Hernández, M. Ángeles; Sánchez-Sastre, Luis Fernando; Campos, FrancicoSe describen en este libro las caracteristicas de la especie Cordulegaster boltonii (Donovan, 1987) (Odonata, Cordulegastridae) en las montañas del Sistema Central de la penincula ibérica.
- Ecosystem services and biodiversity in regional development. The landscape approach.Publication . Quinta-Nova, Luís; Cabaceira, Suzete; Castanho, RuiThe establishment of the Millennium Ecosystem Assessment by the United Nations sparked increased interest in Ecosystem Services (ES), leading to the publication of various articles. Currently, the most accepted definition describes ES as the “benefits that people obtain from ecosystems.” An ecosystem is defined as a “dynamic complex of plant, animal, and microorganism communities and the nonliving environment, interacting as a functional unit”. Over time, the occupation and transformation of land use have markedly reduced the extent of natural habitats and significantly increased their fragmentation. This threatens biodiversity and has negatively affected ecosystems’ functions in producing goods and services essential to human societies. Developing and implementing an ecological network (EN) is considered an effective strategy for nature conservation, enhancing biodiversity and fostering ecological connectivity. In this context, EN adopts a comprehensive perspective on spatial planning, positioning it at the heart of a larger Green Infrastructure framework.
- Selección de sustrato de emergencia por Cordulegaster boltonii (Donovan, 1807) (Odonata: Cordulegastridae) en un río del centro de la Península IbéricaPublication . Casanueva, Patricia; Campos, Francisco; Velasco, Tatiana; Sanz, Germán; Nunes, LuisaSe analizan los sustratos de emergencia de Cordulegaster boltonii en un río del centro de la Península Ibérica. Para ello se recogieron exuvias en un tramo de 60 m de longitud. El 86% de las exuvias estaban sobre vegetales y las restantes sobre rocas del cauce. En la zona analizada las larvas seleccionaron positivamente para emerger plantas de la familia Cyperaceae, principalmente Carex y Eleocharis. Ninguna exuvia se localizó en árboles, tanto troncos como raíces fuera del agua.