The restoration of El Partido stream watershed (Doñana Natural Park)

García-Novo, F.; García, José Carlos Escudero; Carotenuto, Luciana; Sevilla, Daniel García; Faso, Raquel P. Fernández Lo

doi:10.1016/j.ecoleng.2006.09.003

Cited by 22 publications

(27 citation statements)

References 9 publications

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“…During that flooding cycle the northwestern area of the marsh showed a relevant increase in hydroperiod values, as revealed by the anomaly image. The accretion of a large depositional delta with sandy sediments from El Partido tributary stream [72] has dammed the surface inflow waters and re-drawn the original water course, bringing more water to areas that previously did not receive so much (label 4 in Figure 7b). The flooding of artificial ponds in the Caracoles restored area [69] is also evident (label 5 in Figure 7b).…”

Section: Hydroperiod Historical Trend and Anomaliesmentioning

confidence: 99%

“…The Doñana marshes are a vast seasonal freshwater wetland of international importance, considered as Western Europe's largest sanctuary for migratory birds. In 1969 they were declared a national park, then a Biosphere Reserve in 1980, an Important Wetland Site under the Ramsar Convention in 1982, and a Natural World Heritage Site in 1984 [1]. Doñana is also recognized as a Long-Term Socio-Ecological Research (LTSER) platform integrated in the LTER-Europe network [37] by applying harmonized protocols for long-term socio-ecological research.…”

Section: Study Areamentioning

confidence: 99%

“…With a typical Mediterranean climate, the flooding cycle starts in September and usually reaches maximum flooding levels at the end of boreal winter, mainly driven by rainfall [1]. The dominant clay and silt substrates of Doñana marshes are soaked with the first showers and a shallow water layer (0.51 m average water column) spreads over the floodable area ( Figure 1, solid blue area).…”

Section: Introductionmentioning

confidence: 99%

“…In addition to wetland area reduction, tidal influence, one of the main flooding drivers, was also controlled in 1984 by the construction of a dike along the right bank of the Guadalquivir River inside Doñana (Figure 1). Among such dramatic changes, a massive toxic spill in April 1998 to the Guadiamar River (the major tributary), led the scientific community and policy-makers to set up and implement an ambitious restoration program, named 'Doñana 2005', aiming at recovering the quantity and quality of the tributary waters entering these vast wetlands [1]. The project is still ongoing, assessing the success of restoration action.…”

Section: Introductionmentioning

confidence: 99%

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Long-Term Monitoring of the Flooding Regime and Hydroperiod of Doñana Marshes with Landsat Time Series (1974–2014)

et al. 2016

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This paper presents a semi-automatic procedure to discriminate seasonally flooded areas in the shallow temporary marshes of Doñana National Park (SW Spain) by using a radiommetrically normalized long time series of Landsat MSS, TM, and ETM+ images . Extensive field campaigns for ground truth data retrieval were carried out simultaneous to Landsat overpasses. Ground truth was used as training and testing areas to check the performance of the method. Simple thresholds on TM and ETM band 5 (1.55-1.75 µm) worked significantly better than other empirical modeling techniques and supervised classification methods to delineate flooded areas at Doñana marshes. A classification tree was applied to band 5 reflectance values to classify flooded versus non-flooded pixels for every scene. Inter-scene cross-validation identified the most accurate threshold on band 5 reflectance ( < 0.186) to classify flooded areas (Kappa = 0.65). A joint TM-MSS acquisition was used to find the MSS band 4 (0.8 a 1.1 µm) threshold. The TM flooded area was identical to the results from MSS 4 band threshold < 0.10 despite spectral and spatial resolution differences. Band slicing was retrospectively applied to the complete time series of MSS and TM images. About 391 flood masks were used to reconstruct historical spatial and temporal patterns of Doñana marshes flooding, including hydroperiod. Hydroperiod historical trends were used as a baseline to understand Doñana's flooding regime, test hydrodynamic models, and give an assessment of relevant management and restoration decisions. The historical trends in the hydroperiod of Doñana marshes show two opposite spatial patterns. While the north-western part of the marsh is increasing its hydroperiod, the southwestern part shows a steady decline. Anomalies in each flooding cycle allowed us to assess recent management decisions and monitor their hydrological effects.

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Section: Hydroperiod Historical Trend and Anomaliesmentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Long-Term Monitoring of the Flooding Regime and Hydroperiod of Doñana Marshes with Landsat Time Series (1974–2014)

et al. 2016

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“…3): i) a silty-clay floodplain (about 23,000 ha) with a seasonally flooded marshland mainly fed by rainfall and the overflow of streams and rivers; ii) an area of sand dunes fixed by the vegetation; and iii) an active sand dune system with several dune fronts (up to 32 m high, 15 km long and 3 km wide) running parallel to the coast line in a South-West/North-East direction (García-Novo and Marín, 2006). The ecotone or border between the two main units (marshland and sand dunes) also forms a distinct landscape of seasonal wet meadows (Fig.…”

Section: The Doñana Wetlandsmentioning

confidence: 99%

Ecological similarities between two Mediterranean wetlands: Sidi Boughaba (North-West Morocco) and the Doñana National Park (South-West Spain)

et al. 2013

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Addressing the underlying common processes within aquatic systems located in the same geographical region has long been used as a tool for the advancement of limnology. A limnological study of the Merja Sidi Boughaba in 2009 has shown that there are many common features between the physico-chemical and biological conditions of this site and previous data reported from some of the wetlands of the Doñana National Park (South-West Spain). Both are Ramsar sites located on extensive dune systems of the Atlantic coast with a Mediterranean climate. They have a common palaeoenvironmental history that is largely responsible for their similar hydrology and water composition. Oceanic influence has probably produced a slight disproportion of Mg²⁺ over Ca²⁺ through airborne sea salt deposition and the surface evaporation of groundwater feeding these wetlands during annual flood and drought cycles. The wide spectrum of environmental conditions encountered in the Doñana wetlands is epitomised by the Merja Sidi Boughaba, where water and sediment gradually change in the same water body from north to south: from humic-coloured waters and a sandy substrate to a calcium-rich substrate with turbid and silted waters which eventually dry out. As a consequence, the community of submersed macrophytes is very rich and dominated by dense charophyte beds. The high primary production coupled with high biodiversity found in the Merja Sidi Boughaba is also shared by the Doñana wetlands. The high conservation status of both sites enables a useful comparison to be made of the water quality of shallow aquatic systems at a regional scale which, contrary to the trophic classifications developed for deep stratified lakes in temperate regions, is not based on regressions between the concentrations of chlorophyll and total phosphorus (Tot-P) but on the proportions of dissolved and particulate P pools. In these Mediterranean sites, nutrients are more efficiently recycled through the sediment (whether deposited at the bottom or suspended in the water column) while seasonal fluctuations of the water level are stronger than in deep stratified lakes and, hence, no significant correlation was found between chlorophyll and either total or particulate P in our study.

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Seed dispersal effectiveness in fragmented and defaunated landscapes

Fedriani,

Wiegand,

Garrote

et al. 2023

Ecosphere

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Landscape fragmentation and defaunation have major impacts on plant dispersal and dynamics. However, whether the impact of such perturbations on seed dispersal and recruitment change in sign and strength across habitats and spatial scales, and whether they amplify or buffer each other, remains largely unknown. To evaluate, for the first time, the joint impact of fragmentation and defaunation on seed dispersal effectiveness (SDE) across spatial scales (e.g., short‐ and long‐distance seed dispersal), we utilized the long‐term field data of a mammal‐dispersed tree (Pyrus bourgaeana) in a spatially explicit individual‐based model. By means of simulation experiments, we evaluated the effects of different levels of landscape fragmentation and defaunation on SDE and tree recruitment. Our simulation results revealed that the direction and magnitude of the fragmentation effect on SDE depended on its strength (mild, severe) and the spatial scale considered. Severe fragmentation decreased SDE for short‐ and intermediate‐distance seed dispersal. Interestingly, mild and severe fragmentation increased SDE of long‐distance seed dispersal, suggesting a positive effect of such perturbations (i.e., an increase in the proportion of successful long‐distance dispersal events). Though defaunation had a consistently negative effect on overall SDE, its magnitude was highly species‐ and spatial–scale‐dependent. The impact of defaunation on seed dispersal distance was also species‐specific: the proportion of long‐distance dispersal increased under total badger (Meles meles) defaunation but decreased under total fox (Vulpes vulpes) defaunation. A pervasive integration of seed dispersal distance into the SDE framework is essential to most comprehensively understand the scale‐dependent nature of human activity impacts on plant dynamics. In the long term, strong perturbations (landscape fragmentation and defaunation) could select either for or against long‐distance seed dispersal, altering in different ways the ability of plants to cope with climate change.

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The restoration of El Partido stream watershed (Doñana Natural Park)

Cited by 22 publications

References 9 publications

Long-Term Monitoring of the Flooding Regime and Hydroperiod of Doñana Marshes with Landsat Time Series (1974–2014)

Long-Term Monitoring of the Flooding Regime and Hydroperiod of Doñana Marshes with Landsat Time Series (1974–2014)

Ecological similarities between two Mediterranean wetlands: Sidi Boughaba (North-West Morocco) and the Doñana National Park (South-West Spain)

Seed dispersal effectiveness in fragmented and defaunated landscapes

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