Recent Developments in Coastal Benthic Ecology

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Marine Biology".

Deadline for manuscript submissions: closed (20 August 2022) | Viewed by 4377

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Guest Editor
UMR CNRS 6143 M2C (Morphodynamique Continental et Côtière), Caen Normandy University, 24 Rue des Tilleuls, F-14000 Caen, France
Interests: marine ecology; taxonomy; biodiversity; invasive species; marine biodiversity; species diversity; marine invertebrate biology; benthic ecology; coastal ecology; environment

Special Issue Information

Dear Colleagues,

Today, the advances of benthic ecology have increased in the context of marine management and conservation faced with the intensification of human activities and the deployment of Marine Protected Areas. Two decades ago, we entered a new era of benthic research, which has led to the development of new approaches of observation of the seabed, i.e., multi-beam, side-scan, ROV, video, and GPS. The need to evaluate the cumulative impact of human activities in coastal zones in the context of the climatic change has produced an intensification of the number of surveys and descriptions of the coastal marine environment. Moreover, the implementations of national and international directives to assess the ecological status of benthic habitats have stimulated the search for more effective indicators. Furthermore, the available multivariate statistical techniques for identifying benthic assemblages can analyze a large database of quantitative data on benthic samples at different spatiotemporal scales. Coastal benthic communities are colonized by a lot of non-indigenous species, some of which alter the trophic network of such inhabited habitats. However, the main challenge is identifying the respective parts of the effects of climate change and the cumulative effects of human activities on the continental shelf in the functioning and temporal changes of the benthic habitats of this key ecosystem of the marine environment. All these new developments and knowledge around benthic habitats will serve as tools for users and managers to ensure the sustainable function of coastal benthic ecosystems.

Prof. Dr. Jean-Claude Dauvin
Guest Editor

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Keywords

  • mapping
  • anthropogenic pressures
  • quality indicators
  • cumulative impacts
  • climatic change
  • functioning of the benthic ecosystem

Published Papers (2 papers)

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Research

22 pages, 3042 KiB  
Article
Ecological Risk Assessment of Heavy Metals and Environmental Quality of Tunisian Harbours
by Nourhene Rebai, Nawfel Mosbahi, Jean-Claude Dauvin and Lassad Neifar
J. Mar. Sci. Eng. 2022, 10(11), 1625; https://doi.org/10.3390/jmse10111625 - 02 Nov 2022
Cited by 8 | Viewed by 1976
Abstract
Harbours are one of the most disturbed coastal ecosystems due to intensive anthropogenic pressures. This study aimed for the first time to compare anthropogenic impacts in three harbours from the central coast of Tunisia (Mediterranean Sea) employing analysis of heavy metal contamination and [...] Read more.
Harbours are one of the most disturbed coastal ecosystems due to intensive anthropogenic pressures. This study aimed for the first time to compare anthropogenic impacts in three harbours from the central coast of Tunisia (Mediterranean Sea) employing analysis of heavy metal contamination and ecological quality status (EcoQS). Sampling was carried out in spring 2019 in the fishing harbour of Teboulba, the marina of Monastir, and the commercial harbour of Sousse. The high levels of concentration in heavy metals and organic matter were closely related to the fine-grained fraction of the sediment in the fishing and commercial harbours. A total of 94 macrobenthic species, including five nonindigenous species, were identified belonging to six zoological groups. Multivariate analyses highlighted a strong influence of the harbour activity on the diversity of macrozoobenthic communities. Three benthic assemblages were identified according to their environmental characteristics such as sediment type, organic matter content, and heavy metal contamination. Benthic and biotic indices (H′, J′, AMBI, and BO2A) showed that the EcoQS varied from poor (commercial harbour) to good (marina), and was significantly influenced by harbour activity, organic matter, and heavy metal contamination of the sediment. The present work could be considered as providing important baseline data for the implementation of national environmental policies and management plans in the future. Full article
(This article belongs to the Special Issue Recent Developments in Coastal Benthic Ecology)
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33 pages, 5349 KiB  
Article
A Multidisciplinary Approach for A Better Knowledge of the Benthic Habitat and Community Distribution in the Central and Western English Channel
by Jean-Claude Dauvin, Jean-Philippe Pezy, Emmanuel Poizot, Sophie Lozach and Alain Trentesaux
J. Mar. Sci. Eng. 2022, 10(8), 1112; https://doi.org/10.3390/jmse10081112 - 12 Aug 2022
Cited by 3 | Viewed by 1251
Abstract
About 80% of the seabed of the English Channel (EC) is covered by coarse sediment, from coarse sand to pebbles. Quantitative data on the benthic macrofauna in these types of sediment remains are rare due to the difficulty of using grab corers in [...] Read more.
About 80% of the seabed of the English Channel (EC) is covered by coarse sediment, from coarse sand to pebbles. Quantitative data on the benthic macrofauna in these types of sediment remains are rare due to the difficulty of using grab corers in such hard substrates. The deepest central part of the EC (45–101 m depth) was prospected during two VIDEOCHARM surveys in June 2010 and June 2011 to increase knowledge of such sublittoral coarse sediment benthic habitats. Sampling focussed on a longitudinal transect in the deepest part of the EC (13 boxes), extending from the western approach to the Greenwich meridian. Both indirect (side scan sonar, Remote Operated Vehicule) and direct (grab sampling with benthos determination, and grain-size analyses) approaches were used and combined, permitting description of the benthic habitats and communities using seven methods. Five benthic EUNIS habitats (European Nature Information System) were reported: MC3215, MD3211, MC4, MC3212 and MC4215, of which two extended main habitats (MC3211 and M23212) corresponded to an eastern/western gradient from sandy gravel to sandy gravel and pebbles sediment. Three other spatially discrete habitats were associated with poor coarse sand and gravel habitats as well as sandy gravel and pebbles with the presence of the brittle star Ophiothrix fragilis. Taxonomic richness of both extended habitats was on the same order of magnitude as the coarse sand habitat reported elsewhere in the EC, whilst the abundances were among the lowest in deeper areas with low nutrient input and low primary production. The epifauna appeared relatively homogenous in this type of sediment at the scale of the sampling area and was not determined to assign a EUNIS habitat/class. ROV footage illustrated the presence of large epifauna and provided valuable information to ground truth in other sampling methods such as side scan sonar mosaic. Grab photos showing surface sediment was relevant to determine the sediment type, whilst granulometric analyses gave additional information on fine particles content (typically very low). Full article
(This article belongs to the Special Issue Recent Developments in Coastal Benthic Ecology)
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