Monitoring of coastal and transitional waters under the E.U. Water Framework Directive

Ferreira, J.G.; Vale, Carlos; Soares, C.; Salas, F.; Stacey, Paul E.; Bricker, Suzanne B.; Silva, M. C.; Marques, João Carlos

doi:10.1007/s10661-007-9643-0

Cited by 95 publications

(60 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition, due to the extreme low values of DO and similar to what has previously been suggested by Ferreira et al, 9 shorter sampling intervals, compared with the 3 months proposed by the WFD, could be considered.…”

Section: Discussionmentioning

confidence: 76%

“…This recent legislation has created the need to develop tools for the assessment of the quality status of water bodies. One example of this is the Assessment of Estuarine Trophic Status (ASSETS) methodology, described by Bricker et al 8 and adapted to the Portuguese Tagus estuary by Ferreira et al 9 and to the Ria Formosa coastal lagoon by Nobre et al 10 However, the definition of undesirable disturbance is still the subject of much discussion and motivates the constant development of methodologies for the implementation of the WFD.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sediment and waternutrients and microalgae in a coastal shallow lagoon, Ria Formosa (Portugal): Implications for the Water Framework Directive

et al. 2010

View full text Add to dashboard Cite

Coastal shallow lagoons are considered to be highly important systems, which have specific biogeochemical cycles and characteristics. The assessment of sediment-water interfaces is essential to understand nutrient dynamics and to evaluate the vulnerability to eutrophication, especially in regions of restricted water exchange (RRE), such as the Ria Formosa, which have natural conditions for the accumulation of nutrients. Water samples were collected during the years of 2006 and 2007-08 for nutrients, chlorophyll a and dissolved oxygen. Sediment samples were also collected for pore water nutrients and microphytobenthic chlorophyll a. Measurements of temperature, salinity and photosynthetic active radiation were also taken. The lagoon salinity is affected by occasional strong rainfall events. From comparison with previous work, a decrease in the nitrogen concentration in the water column can be observed, which may indicate an improvement of the water quality. Pore water nutrient concentrations were significantly larger than in the water column. Sediment-water exchanges are considered to be the most important processes in nutrient dynamics of the lagoon. Benthic microalgal biomass was also large compared with that of the phytoplankton. It represents about 99% of the total microalgal chlorophyll biomass of the system. The lagoon also contains (discontinuous) meadows of intertidal seagrass, but we did not study these. Due to the importance of sediments, the standard monitoring plans required by the Water Framework Directive may fail to track changes in the nutrient conditions and the microalgal responses to them.

show abstract

Section: Discussionmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Sediment and waternutrients and microalgae in a coastal shallow lagoon, Ria Formosa (Portugal): Implications for the Water Framework Directive

et al. 2010

View full text Add to dashboard Cite

show abstract

“…In the context of climate change, systematically monitoring essential climate variables (ECV), one of which is ocean temperature (both at the surface and subsurface), is vital for coastal management [13,14]. Sea surface temperature (SST) is considered by the Global Climate Observing System as an ECV [14,15], and described in the 5th Assessment Report (AR5) of the Intergovernmental Panel on Climate Change (IPCC) as a key driver of climate change impacting coastal systems [16].…”

Section: Introductionmentioning

confidence: 99%

Evaluating Operational AVHRR Sea Surface Temperature Data at the Coastline Using Benthic Temperature Loggers

et al. 2018

View full text Add to dashboard Cite

Abstract:The nearshore coastal ocean is one of the most dynamic and biologically productive regions on our planet, supporting a wide range of ecosystem services. It is also one of the most vulnerable regions, increasingly exposed to anthropogenic pressure. In the context of climate change, monitoring changes in nearshore coastal waters requires systematic and sustained observations of key essential climate variables (ECV), one of which is sea surface temperature (SST). As temperature influences physical, chemical and biological processes within coastal systems, accurate monitoring is crucial for detecting change. SST is an ECV that can be measured systematically from satellites. Yet, owing to a lack of adequate in situ data, the accuracy and precision of satellite SST at the coastline are not well known. In a prior study, we attempted to address this by taking advantage of in situ SST measurements collected by a group of surfers. Here, we make use of a three year time-series (2014-2017) of in situ water temperature measurements collected using a temperature logger (recording every 30 min) deployed within a kelp forest (∼3 m below chart datum) at a subtidal rocky reef site near Plymouth, UK. We compared the temperature measurements with three other independent in situ SST datasets in the region, from two autonomous buoys located ∼7 km and ∼33 km from the coastline, and from a group of surfers at two beaches near the kelp site. The three datasets showed good agreement, with discrepancies consistent with the spatial separation of the sites. The in situ SST measurements collected from the kelp site and the two autonomous buoys were matched with operational Advanced Very High Resolution Radiometer (AVHRR) EO SST passes, all within 1 h of the in situ data. By extracting data from the closest satellite pixel to the three sites, we observed a significant reduction in the performance of AVHRR at retrieving SST at the coastline, with root mean square differences at the kelp site over twice that observed at the two offshore buoys. Comparing the in situ water temperature data with pixels surrounding the kelp site revealed the performance of the satellite data improves when moving two to three pixels offshore and that this improvement was better when using an SST algorithm that treats each pixel independently in the retrieval process. At the three sites, we related differences between satellite and in situ SST data with a suite of atmospheric variables, collected from a nearby atmospheric observatory, and a high temporal resolution land surface temperature (LST) dataset. We found that differences between satellite and in situ SST at the coastline (kelp site) were well correlated with LST and solar zenith angle; implying contamination of the pixel by land is the principal cause of these larger differences at the coastline, as opposed to issues with atmospheric correction. This contamination could be either from land directly within the pixel, potentially impacted by errors in geo-location, or possibly through thermal adjacenc...

show abstract

Section: Introductionmentioning

confidence: 99%

“…These include physical (e.g., temperature, salinity, turbidity), biological (e.g., phytoplankton abundance and composition, macrophyte abundance), and chemical (e.g., nutrient concentrations, oxygen, pH, toxic contaminants) indicators (Ferreira et al, 2007). There is a requirement for observations of these indicators for monitoring climate and biodiversity, and for management of water quality, conservation and resources (Borja, 2005;Ferreira et al, 2007). Yet, despite the demand for observations and its important role in Earth system science, the aquatic environment is critically undersampled in time and space (Huang and Xia, 2001; Alverson and Baker, 2006;Davidson et al, 2007;Defeo et al, 2009), impeding our ability to understand how our planet functions, how it is responding to human activity, and how to manage its resources sustainably.…”

Section: Introductionmentioning

confidence: 99%

Expanding Aquatic Observations through Recreation

et al. 2017

View full text Add to dashboard Cite

Accurate observations of the Earth system are required to understand how our planet is changing and to help manage its resources. The aquatic environment-including lakes, rivers, wetlands, estuaries, coastal and open oceans-is a fundamental component of the Earth system controlling key physical, biological, and chemical processes that allow life to flourish. Yet, this environment is critically undersampled in both time and space. New and cost-effective sampling solutions are urgently needed. Here, we highlight the potential to improve aquatic sampling by tapping into recreation. We draw attention to the vast number of participants that engage in aquatic recreational activities and argue, based on current technological developments and recent research, that the time is right to employ recreational citizens to improve large-scale aquatic sampling efforts. We discuss the challenges that need to be addressed for this strategy to be successful (e.g., sensor integration, data quality, and citizen motivation), the steps needed to realize its potential, and additional societal benefits that arise when engaging citizens in scientific sampling.

show abstract

Monitoring of coastal and transitional waters under the E.U. Water Framework Directive

Cited by 95 publications

References 27 publications

Sediment and waternutrients and microalgae in a coastal shallow lagoon, Ria Formosa (Portugal): Implications for the Water Framework Directive

Sediment and waternutrients and microalgae in a coastal shallow lagoon, Ria Formosa (Portugal): Implications for the Water Framework Directive

Evaluating Operational AVHRR Sea Surface Temperature Data at the Coastline Using Benthic Temperature Loggers

Expanding Aquatic Observations through Recreation

Contact Info

Product

Resources

About