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- A vida nas dunasPublication . Marcelino, AnaA dinâmica nas dunas não se pode separar do que acontece na praia, o mesmo acontece em termos biológicos Quando se estuda as dunas, temos que olhar também para as interações praia-duna. São um contínuo. A vida nas dunas costeiras tem fortes limitações. Requere um organismo adaptado a: ! Resistir a mudanças de temperaturas ! Alta salinidade e temperatura ! Falta de substrato/limite de nutrientes ! Ventos fortes ! Pouca água As especializações que os animais e plantas apresentam estão relacionadas com a proximidade com o oceano e com o tipo de sedimentos presentes. As plantas são um fator chave na ecologia das dunas. Fornecendo: • Fixação de areia • Abrigo • Fontes de alimentação e nutrientes • Camuflagem • Acesso a água
- Sustainable management of coastal sand dunes to human activities and natural disasters in Oregon, the United StatesPublication . Sampath, Ruwan D.; Freitas, Joana G.Dune destabilization became a socio-economic issue as Euro-Americans settled in Oregon in the 19th century. Non-native Ammophila arenaria and Ammophila breviligulata were widely used for stabilization from the early-20th century. As non-native beachgrasses turned invasive causing the loss of biodiversity and habitats, their removal became the focus to regain the active dunes to support the natural processes of the ecosystem. In this work we aimed to understand the response of coastal sand dunes to natural hazards (e.g. sea-level rise), human activities (e.g. settlement, urbanization and animal husbandry) and dune management initiatives (e.g. planting of non-native beachgrasses) in Oregon in the United States during two contrasting periods: 1) from the 19th to late-20th century and 2) from there to the early-21st century.
- As Areias da Caparica : Uma história de intervenção humana num sistema praia-dunaPublication . Palma, Monique; Marcelino, Ana; Sampath, Ruwan D.; Dias, João Alveirinho; Freitas, Joana Gaspar deUm storymap sobre a intervenção humana feita nas dunas da Costa da Caparica, em particular na praia de S. João, a partir do século XIX, com o primeiro levantamento dunar, as experiências de arborização e a construção de um sistema de drenagem. Uma perspectiva de longo prazo sobre a evolução desses ambientes híbridos.
- The Sand of Caparica : A history of human intervention in a beach-dune system (Portugal)Publication . Palma, Monique; Marcelino, Ana; Sampath, Ruwan D.; Dias, João Alveirinho; Freitas, Joana Gaspar deA historical research about the human intervention in Costa da Caparica, particularly at S. João beach, starting in the 19th century, with the first dunes’ survey, the afforestation experiences and the construction of a drainage system. A long-term perspective on the socio-evolution of these hybrid environments.
- Dinâmica dos sistemas dunaresPublication . Freitas, Joana Gaspar de; Tudor, MihaelaApresentação sobre os processos de dinâmica dunar litoral com exemplos da costa portuguesa.
- Praias e dunas : como o litoral conta a história do século XXPublication . Freitas, Joana Gaspar deComo a percepção da população em geral das praias e dunas como ambientes inúteis e perigosas, mudou para um ambiente desejado, muito procurado para banhos terapêuticos, eventos lúdicos e actividades económicas.
- Dune(s): Fiction, History and SciencePublication . Freitas, Joana Gaspar deThe story map "Dune(s): Fiction, History and Science" tells the story of the dunes stabilization programs developed on the US Northern Pacific Coast, that influenced Frank Herbert to write his great novel: Dune https://bit.ly/2MnNGMg
- A DPSIR analysis of aeolian sand dune mobilization along the coast of Manawatu-Wanganui in New ZealandPublication . Sampath, Dissanayake Mudiyanselage Ruwan; Freitas, Joana Gaspar deCoastal sand dunes are multifunctional landscapes with rich biodiversity and provide ecological goods and services. They play a dual role as a sediment sink or a source to maintain the long-term stability of a coastal system. These landscapes have been affected by human settlements, economic activities and recreational purposes. Sand dunes in the Manawatu-Wanganui region, in New Zealand, have been subjected to such forcings during Maori settlements and, in particular, since the establishment of Europeans since 1840. Consequently, dunes have evolved from a transgressive system to a parabolic one, while the rate of dune drifting is still observed to be one of the highest in the world. Because this was a problem for populations living in the area, there were several attempts to arrest dune drifting. Using the Driver-Pressure-State-Impact-Response (DPSIR) cyclic framework, we analyzed these interventions during two-time frames: 1) from the 19th to 20th century and 2) during the early 21st century. We checked for data in historical records and literature including the Parliamentary debates of New Zealand. Historical evolutionary trends were inferred by analyzing a series of maps since 1773. The present-day impacts were derived from a series of georeferenced google images from 1983 using the ESRI ArcGIS tools. The coastal management responses were obtained through scientific literature and reports of the Horizon Regional Council. According to the analysis, drivers of dune drift before the 21st century were 1) settlements resulting in burning shrubs, deforestation, grazing, agriculture, mining, and building, 2) introduction of non-native animals. The pressures were: 1) mobile dunes and 2) blowouts. The assessment of the state of the environment included: 1) soil fertility, 2) habitat quality, 3) river navigability and 4) air quality. The assessed impacts were 1) increase of wasteland and loss of fertility, 2) foredune erosion, 3) impact on transportation and 4) creation of swamps as river mouths were closed. The management responses included 1) introduction of 1903 and 1908 Sand Drift acts for reclamation of affected areas, 2) introduction of exotic vegetation (e.g. Marram grass) and 3) foredune building using sand trapping fences. The main drivers of the 21st century are 1) intensive urbanization, 2) introduction of exotic vegetation and 3) global fossil fuel burning. The invasive character of marram resulted in the loss of biodiversity. The coastline erosion due to sea-level rise during the 21st century will be moderated due to its progradational nature. The study revealed a significant spatial variability of the rate of dune drift. The responses include 1) a consolidated “One Plan” as mandated by 1991 Resource Management Act; 2) removal of exotic vegetation to support native biodiversity by enhancing natural processes of dunes (a paradigm shift in dune management); 3) enhancing awareness while encouraging the public participation in mitigating measures. In conclusion, historical data combined with DPSIR framework tools showed that management interventions should be implemented considering long-term and interdisciplinary analysis to better understand the systems’ evolution and the full consequences of human actions.
- Assessing natural and anthropogenic forcing and conditioning factors in transgressive dune fields in the last two centuriesPublication . Tudor, Mihaela; Ramos Pereira, A.; Freitas, Joana Gaspar de
- Condicionantes naturais e antropogénicas na evolução dos campos dunares transgressivosPublication . Tudor, Mihaela; Ramos-Pereira, Ana; Freitas, Joana Gaspar de