Combined synthetic and biotic indices of Posidonia oceanica to qualify the status of coastal ecosystems in the North Aegean

Güreşen, Aysu; Güreşen, Sedat Ozan; Aktan, Yelda

doi:10.1016/j.ecolind.2020.106149

Cited by 3 publications

(2 citation statements)

References 23 publications

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“…The same approach could also be applied on subtidal rhodolith beds in other areas worldwide of high concern with regard to related human activities (e.g., Brittany). The strength of the EBQIs implemented from now in the Mediterranean Sea is the possibility to measure an ecological status even without all the descriptors assessed with the appropriate method, using the Confidence Index (CI) (see Bevilacqua et al, 2020;Güresȩn et al, 2020). This point could allow a preliminary evaluation of CDB in areas with limited human and material resources.…”

Section: Ebqi Implementation For Cdbmentioning

confidence: 99%

Ecosystem-based assessment of a widespread Mediterranean marine habitat: The Coastal Detrital Bottoms, with a special focus on epibenthic assemblages

et al. 2023

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IntroductionCoastal detrital bottoms (CDB) are one of the most extensive habitats of the continental shelf worldwide, in the upper levels of the circalittoral zone. Hosting a diverse community structured by sediment grain size, trophic interactions and calcified organisms, CDB exhibit important ecological functions. In the Mediterranean Sea, CDB are constituted by recent elements partly provided by adjacent infralittoral and circalittoral ecosystems. Since the 2010s, the offshore extension of many Marine Protected Areas (MPAs) has resulted in the incorporation of vast areas of CDB, raising the issue of their management. The Marine Strategy Framework Directive (MSFD) has embraced the concept of an ecosystem-based approach involving taking into account the functioning of marine habitats and their related ecosystem services. The purpose of this paper is to propose an ecosystem-based quality index (EBQI) tested on CDB from the north-western Mediterranean Sea, focusing mainly on epibenthic assemblages.MethodsThe first step has been to define a conceptual model of the CDB functioning, including the main trophic compartments and their relative weighting, then to identify appropriate assessment methods and potential descriptors. Twenty-nine sites were sampled along the coast of Provence and French Riviera (Southern France). Study sites were chosen with a view to encompassing a wide range of hydrological conditions and human pressures.ResultsVery well-preserved sites were found in Provence in areas without trawling and terrigenous inputs, while impacted and low-ES sites were located in the vicinity of urbanized areas. The cover of rhodoliths characterizes the seascape and might be an indicator of the good ES of CDB and reduced human pressure. However, the absence of rhodoliths may also be induced by natural phenomena.DiscussionThe EBQI designed for CDB proved representative and useful for a functional assessment based on epibenthic assemblages. However, some descriptors have shown their limitations and should be further explored. We highlight here the priority of establishing an index corresponding to a societal demand (e.g., European Directives, Barcelona convention) as a basis for a broad and large-scale assessment, for practical reasons. We stress the need to better apprehend the role of the macro-infauna and to extend this index over a wider geographical scale.

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Section: Ebqi Implementation For Cdbmentioning

confidence: 99%

Ecosystem-based assessment of a widespread Mediterranean marine habitat: The Coastal Detrital Bottoms, with a special focus on epibenthic assemblages

et al. 2023

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“…They provide key ecosystem services in coastal regions, supporting fisheries [3,4], protecting from coastal erosion [5], and acting as a sink for carbon [6,7]. Seagrasses are considered biological sentinels [8] and have been adopted as bioindicators for numerous marine ecosystem health monitoring programs [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Mapping and Characterizing Eelgrass Meadows Using UAV Imagery in Placentia Bay and Trinity Bay, Newfoundland and Labrador, Canada

Sneep,

Devillers,

Robert

et al. 2024

Sustainability

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Sustainable coastal social–ecological systems rely on healthy ecosystems known to provide benefits to both nature and people. A key ecosystem found globally is seagrass, for which maps at a scale relevant to inform conservation and management efforts are often missing. Eelgrass (Zostera marina), a species of seagrass found throughout the northern hemisphere, has been declining in Placentia Bay, an ecologically and biologically significant area of Canada’s east coast subject to an increasing human impact. This research provides baseline information on the distribution of eelgrass meadows and their anthropogenic stressors at seven sites of Placentia Bay and three sites of the adjacent Trinity Bay, on the island of Newfoundland. High-resolution maps of eelgrass meadows were created by combining ground-truth underwater videos with unmanned aerial vehicle imagery classified with an object-based image analysis approach. Visual analyses of the imagery and underwater videos were conducted to characterize sites based on the presence of physical disturbances and the semi-quantitative cover of epiphytes, an indication of nutrient enrichment. A total eelgrass area of ~1 km2 was mapped across the 10 sites, with an overall map accuracy of over 80% for 8 of the 10 sites. Results indicated minimum pressures of physical disturbance and eutrophication affecting eelgrass in the region, likely due to the small population size of the communities near the eelgrass meadows. These baseline data will promote the sustainability of potential future coastal development in the region by facilitating the future monitoring and conservation of eelgrass ecosystems.

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The ecological status of relict Posidonia oceanica (Linnaeus) Delile meadows: the case of Cala San Giacomo (Apulia, Adriatic Sea)

Denti,

Rubino,

Papa

et al. 2023

2023 IEEE International Workshop on Metrology for the Sea; Learning to Measure Sea Health Parameters (MetroSea)

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Combined synthetic and biotic indices of Posidonia oceanica to qualify the status of coastal ecosystems in the North Aegean

Cited by 3 publications

References 23 publications

Ecosystem-based assessment of a widespread Mediterranean marine habitat: The Coastal Detrital Bottoms, with a special focus on epibenthic assemblages

Ecosystem-based assessment of a widespread Mediterranean marine habitat: The Coastal Detrital Bottoms, with a special focus on epibenthic assemblages

Mapping and Characterizing Eelgrass Meadows Using UAV Imagery in Placentia Bay and Trinity Bay, Newfoundland and Labrador, Canada

The ecological status of relict Posidonia oceanica (Linnaeus) Delile meadows: the case of Cala San Giacomo (Apulia, Adriatic Sea)

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