Browsing by Issue Date, starting with "2005-08"
Now showing 1 - 6 of 6
Results Per Page
Sort Options
- The marine algal (seaweed) flora of the Azores: additions and amendments.Publication . Tittley, Ian; Neto, Ana I.Thirteen species of benthic marine algae are reported new for the isolated mid-Atlantic Azores archipelago and five older records are confirmed. Seven (Bangia atropurpurea, Codium fragile spip. tomentosoides, Ectocarous fasciculatus, E siliculosus, Porphyrostromium ciliare, Ulothrix flacca and Ulvaria oxysperma) are widespread amphi-Atlantic species some of which extend in distributional range south to the Canary Islands. Cryptonemia seminervis, Ctenosiphonia hypnoides and Phyllophora sicula are known from the northeastern Atlantic Ocean only and also occur in the Canary Islands. The Azores archipelago is the western limit of distribution of Codium fragile ssp. atlanticum, Bostrychia scorpioides, Bryopsis cupressina, Erythroglossum laciniatum, Haliptilon squamatum and Phyllophora sicula, and the southern limit of C. fragile ssp. atlanticum and E laciniatum. The tropical species Phyllodictyon anastomosans, Valonia macrophysa and Wurdemannia miniata reach their northern limit of distribution there. Asparagopsis taxiformis is now less common possibly due to competition with the non-native A. armata; subspecies of the non-native C. fragile now occur widely in the Azores. The status of Fucus vesiculosus, Ulva (Enteromorpha) clathrata and Rhizoclonium tortuosum is clarified and other species have been removed from the flora. The continuing addition of new species records for the Azores shows the archipelago to be floristically richer than other Atlantic islands except for the Canary Islands.
- Impacts of anthropogenic and boreal fire emissions in the central North Atlantic lower free troposphere: summertime observations at the PICO-NARE observatory.Publication . Val Martin, Maria; Honrath, Richard; Kleissl, J.; Owen, Robert; Lapina, K.; Fialho, Paulo; Helmig, Detlev; Tanner, D. M.We present measurements of CO, O3, aerosol Black Carbon (BC) made over the central North Atlantic lower Free Troposphere (FT) during the summers of 2001-2004 along with measurements of nitrogen oxides (NOx and NOy) made during the summer of 2004 (ICARTT period) and non-methane hydrocarbons (NMHCs) made during the winter 2004-spring 2005.
- 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.
- Influence of dietary fish oil on conjugated linoleic acid, omega-3 and other fatty acids in milk fat from grazing dairy cowsPublication . Rego, Oldemiro Aguiar do; Rosa, Henrique José Duarte; Portugal, Paula V.; Cordeiro, R.; Borba, Alfredo Emílio Silveira de; Vouzela, Carlos Fernando Mimoso; Bessa, Rui José B.The main objective of this study was to evaluate the effect of supplementation with fish oil on fatty acid (FA) composition of milk fat from grazing dairy cows with particular emphasis on omega-3 and conjugated linoleic acid. Twelve dairy cows in mid-lactation were blocked by live weight, days in lactation and milk production and randomly assigned to the experimental groups corresponding to 3 different feeding regimens which were applied 3 times with 28-day duration according to a Latin square design. Cows were stocked at 2.5 heads per hectare and supplemented with 4 kg concentrate/cow/day (C), concentrate mixed with 160 g sardine oil (LFO) and concentrate mixed with 320 g sardine oil (HFO). Supplementation with fish oil (FO) resulted in a significant (P<0.05) decrease in milk production and milk fat content and production. Supplementation with 320 g FO decreased (P<0.05) milk protein content and production. The ratio protein/fat in milk increased with the level of FO supplemented (P<0.05). Significant correlations were detected between some FA in milk fat and milk fat content. FO supplementation had no effect on concentration of medium chain FA but originated a decrease (P<0.05) in concentration of short and long chain FA in milk fat. The sum of saturated FA decreased (P<0.05) with the inclusion of FO in diet while the sum of unsaturated FA remains unchanged. Proportions of stearic and oleic FA in milk fat decreased and trans-vaccenic FA increase with FO supplementation (P<0.05). Milk fat concentration of polyunsaturated n-3 FA was higher in treatment HFO. Concentration of very long chain omega FA in milk fat (i.e. C20:5-EPA e C22:6-DHA) increased by 2.7-fold with 160 g FO and by 5- to 7-fold with 320 g FO. However, the level of transfer efficiency of these FA from FO to milk fat was only 3.3% in treatment LFO and 4.0% in treatment HFO. CLA concentrations in milk fat were particularly high in this experiment and increased with the level of FO supplementation (P<0.05).
- PARQMAR: Characterization and management of marine protected areas of the Macaronesia – The cases of "Eco-parque Marinho do Funchal" (Madeira Is.), Santa Maria Is. (Azores), Tenerife Is. and Gran Canaria Is. (Canary Islands).Publication . Araújo, Ricardo; Delgado, João; Martín, Rafael; Haroun, Ricardo J.; Neto, Ana I.; Chavez, V.; Sanchez-Araña, J.The aim of this project is to promote conservation and sustainable use of coastal ecosystems in several MPAs located in different archipel agos of the Macaronesian Region: Azores, Madeira and Canary Islands (Central Atlantic Ocean) through a close transnational cooperation. The main benthic and fish communities are charact erized as well as the diverse economic activities performed inside the MPAs. The surveys are carried out both in the intertidal and in the subtidal areas of Santa Maria Isl and (Azores), the Eco-Parque Marinho do Funchal (Madeira) and in two coastal sectors in Gran Canaria and in Teneri fe Islands (Canary Islands). From the dat a obtained a zoning and management plan for each MPA will be done to support the sustainable use of their marine resources. PARQMAR is a project supported by the EU Initiative INTERREG III-B (Madei ra, Azores, Canari es), project PARQMAR (03/MAC/4.2/M9).
- Should we recognize an order Ralfsiales within the Phaeophyceae?Publication . Parente, Manuela I.; Rousseau, Florence; Fletcher, Robert L.; Neto, Ana I.; Reviers, Bruno