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ARQ - LMS - Número 37

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http://hdl.handle.net/10400.3/5848

Artigos publicados no Número 37 - 2020

CONTENTS:

CLARA POLAINO-MARTIN, ROSALINA GABRIEL, PAULO A.V. BORGES, RICARDO CRUZ AND ISABEL S. ALBERGARIA - Bryophytes of Azorean parks and gardens (I): “Reserva Florestal de Recreio do Pinhal da Paz” - São Miguel Island.

PINHO, M., R. SANTOS, O. MELO, E. ISIDRO, A. NOVOA-PABON, W. SILVA AND J. GONÇALVES - Estimates of biomass and potential yield for the deep-water red crab, Chaceon affinis and the toothed rock crab, Cancer bellianus (Decapoda: Brachyura) off the Azores (Mid-North Atlantic).

HIPÓLITO, C., R.M.A. NETO, T.M.M. COSTA, M.A. DIONÍSIO, A.C.L. PRESTES, J.M.N. AZEVEDO, G.M. MARTINS AND A.I. NETO - Frondose and turf-dominated marine habitats support distinct trophic pathways: Evidence from ¹⁵N and ¹³C stable isotope analyses.

SANTOS, RÉGIS, W. MEDEIROS-LEAL AND M. PINHO - Stock assessment prioritization in the Azores: procedures, current challenges and recommendations.

AZEVEDO, JOSÉ M.N. AND R.M.A. NETO - Life goes on: Oblada melanura (Linnaeus, 1758) (Perciformes, Sparidae), the saddled seabream, expands its distribution range westwards to the Azores.

TENNENT, J. - Book Review - The ecology, biogeography and speciation of the butterflies of the Azores, by Mark Payne. Hardback. World Natural History Publications, “The Lake District”.

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  • Bryophytes of Azorean parks and gardens (I) : «Reserva Florestal de Recreio do Pinhal da Paz» : São Miguel Island
    Publication . Polaino-Martin, Clara; Gabriel, Rosalina; Borges, Paulo A. V.; Cruz, Ricardo; Albergaria, Isabel Soares de
    Historic urban parks and gardens are increasingly being considered as interesting refuges for a great number of species, including some rare taxa, otherwise almost absent from urban areas, such as many bryophytes and other biota that are not their main focus. After a bibliographic work, the "Reserva Florestal de Recreio do Pinhal da Paz" (RFR-PP), in São Miguel Island (Azores), stood out as one of the least studied areas of the region, without any bryophyte’ references. Thus, the aim of this study was to identify the most striking bryophyte species present along the main visitation track of RFR-PP, in order to increase its biodiversity knowledge. Bryophytes growing on rocks, soil or tree bark were collected adhoc, in 17 sites, ca. 100 m apart from each other. In total, 43 species were identified: 23 mosses, 19 liverworts, and one hornwort, encompassing five classes, 15 orders and 27 families. Seven species are endemic from Europe and three from Macaronesia. No invasive bryophytes were found in the surveyed area. These results update the distribution data of São Miguel Island, show that Azorean parks and gardens contribute to the community dynamics of bryophytes at lower elevation and add a new layer of interest to the visitors of RFR-PP.
    2020Journal article Open access Show more
  • Estimates of biomass and potential yield for the deep-water red crab, Chaceon affinis and the toothed rock crab, Cancer bellianus (Decapoda: Brachyura) off the Azores (Mid-North Atlantic)
    Publication . Pinho, Mário Rui; Santos, Régis; Melo, Octávio; Isidro, Eduardo; Novoa-Pabon, Ana Maria; Leal, Wendell Medeiros; Gonçalves, João M.
    Available information on the deep-water red crab, Chaceon affinis and the toothed rock crab, Cancer bellianus, resulting from exploratory research surveys and commercial fishing experiments carried out in the Azorean Exclusive Economic Zone (EEZ), were summarized to estimate the biomass and potential yield (Maximum Sustainable Yield – MSY) for both fishery resources. The fishery potential was estimated through empirical methods usually applied when available information is scarce in line with the precautionary approach principle. Results suggest modest MSY values (considered as precautionary Total Allowable Catch – TAC), around 2,205 t for the deep-water red crab (2,159 t year-1 at seamounts and 46 t year-1 at coastal areas), and 471 t for the toothed rock crab (281 t year-1 at offshore seamounts and 189 t year-1 at coastal areas). Considering the limited available data and high uncertainty associated with these estimations, it is suggested that only a reduced number of vessels should be allowed to fish in the aggregated areas, namely coastal and seamount areas. The exploitation of these resources should be started in a very limited way followed by an ad hoc observer programme, aiming to collect reliable data that will allow, if it is the case, to raise in the future the exploitation level in a gradual and sustainable way.
    2020Journal article Open access Show more
  • Frondose and turf-dominated marine habitats support distinct trophic pathways: evidence from ¹⁵N and ¹³C stable isotope analyses
    Publication . Hipólito, Cláudia; Neto, Raul M. A.; Costa, Tarso; Dionísio, Maria Ana; Prestes, Afonso L.; Azevedo, José M. N.; Martins, Gustavo M.; Neto, Ana I.
    Marine vegetation plays an important structuring role, delivering key functions and services to coastal systems the extent of which depends on the foundation species and their architecture. In increasingly urbanised coastlines, turf-forming macroalgae are replacing frondose morphotypes. Trophic relationships within these systems can be studied through stable isotope analysis of the different food web compartments. In the present study, we investigated trophic pathways in two distinct macroalgal assemblages: one dominated by small brown frondose algae, and one dominated by low-lying turf-forming species. ¹⁵N and ¹³C isotopic signatures were determined for selected macroalgae and sedentary animals from distinct trophic levels, collected from two habitats on São Miguel Island (Azores, Portugal). In frondose habitats macroalgae appeared to make up the primary carbon source for the entire food web, whilst in turf-dominated habitats there was a decouple between macroalgae and higher trophic levels. Because canopy replacement by algal turf may affect the structure of the littoral food webs, coastal biodiversity conservation strategies should give priority to natural areas rich in canopy-forming algae.
    2020Journal article Open access Show more
  • Stock assessment prioritization in the Azores : procedures, current challenges and recommendations
    Publication . Santos, Régis; Leal, Wendell Medeiros; Pinho, Mário Rui
    To implement the Marine Strategy Framework Directive (MSFD) of the European Union (EU) in order to achieve the Sustainable Development Goals (SDGs) of the United Nations (UN) regarding the biological sustainability of marine fisheries, it is fundamental to apply a framework for prioritizing stocks. This process helps the regional managers to make the best use of data and resources for management. The present study describes and applies a standard framework for prioritization of stock assessment in the Azores. The current state of the selected stocks is identified and the main issues and gaps for assessment are presented and discussed. A total of 138 species were landed in the region during the period 2009-2019. Twenty-two (18 fishes, 2 molluscs and 2 crustaceans) were selected as priority stocks according to the Food and Agriculture Organization of the United Nations (FAO) and International Council for the Exploration of the Sea (ICES) criteria. Most of these showed a decreasing trend in their abundances. Only four stocks are currently assessed using data-limited approaches: Pagellus bogaraveo, Aphanopus carbo, Raja clavata, and Trachurus picturatus. No biological reference points are defined and stock and exploitation status relative to Maximum sustainable yield (MSY) are not assessed. The main issues identified were the lack of information regarding catches and population structure and validated analytical methods. Future studies should evaluate which methods for assessment may be suitable for each stock and identify what additional data are needed to improve the analyses.
    2020Journal article Open access Show more
  • Life goes on : Oblada melanura (Linnaeus, 1758) (Perciformes, Sparidae), the saddled seabream, expands its distribution range westwards to the Azores
    Publication . Azevedo, José M. N.; Neto, Raul M. A.
    A group of 10 individuals of the saddled seabream, Oblada melanura (Linnaeus, 1758), was photographed at Lajes do Pico Bay, on Pico Island, Azores. This finding represents a significant westward expansion of the known range of this species and may be linked to global warming. A call is therefore made for a monitoring program of the coastal fish fauna of the Azores which would improve the understanding of the effects of climate change and other anthropogenic stressors on marine communities.
    2020Journal article Open access Show more
  • The ecology, biogeography and speciation of the butterflies of the Azores, by Mark Payne. Hardback. World Natural History Publications, “The Lake District”, 2019, 370 pp.
    Publication . Tennent, John
    This is the second book in a planned series of numerous books covering all of the world’s butterflies. It opens with a detailed and lengthy account of the author, his supposed achievements and future plans. A prominent acknowledgement to Martin Wiemers, a highly respected European entomologist, is out of date. Martin has disassociated himself from the books and withdrawn co-authorship of a proposed volume on Macaronesian endemic butterflies advertised in the book. […].
    2020Review Open access Show more