Submerged benthic macrophytes in Mediterranean lagoons: distribution patterns in relation to water chemistry and depth

Fur, Ines Le; Wit, Rutger de; Plus, Martin; Oheix, Jocelyne; Simier, Monique; Ouisse, Vincent

doi:10.1007/s10750-017-3421-y

Cited by 38 publications

(41 citation statements)

References 85 publications

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“…Colpomenia peregrina and Grateloupia turuturu) (Cecere et al 2011;Petrocelli et al 2013). The predominance of Rhodophyta is seen to be a typical pattern in most TWSs (Falace et al 2009;Ramdani et al 2015;Le Fur et al 2018), except for environments characterised by noticeable surges in nutrient concentrations and salinity, where Chlorophyta are dominant (Piñón-Gimate et al 2008;Pellizzari et al 2009). However, the most evident development in the last few years in the Mar Piccolo is the increase in Ochrophyta.…”

Section: Discussionmentioning

confidence: 99%

Successions of phytobenthos species in a Mediterranean transitional water system: the importance of long term observations

Petrocelli¹,

Cecere²,

Rubino³

2019

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The availability of quantitative long term datasets on the phytobenthic assemblages of the Mar Piccolo of Taranto (southern Italy, Mediterranean Sea), a lagoon like semi-enclosed coastal basin included in the Italian LTER network, enabled careful analysis of changes occurring in the structure of the community over about thirty years. The total number of taxa differed over the years. Thirteen non-indigenous species in total were found, their number varied over the years, reaching its highest value in 2017. The dominant taxa differed over the years. The number of species in each taxonomic division also varied. In addition to the centuries-old exploitation of its biotic resources, mainly molluscs, the basin has been subject for a long time to a range of anthropogenic driving forces linked to urbanisation, shipbuilding, agriculture and military activities, which have caused chemical and biological pollution, eutrophication and habitat destruction. It may therefore be assumed that these changes were closely related to human activities. Indeed, it was observed that the reduction of only one of these forces, i.e. urban sewage discharge, triggered the recovery of phytobenthos. Therefore, it may be assumed that if the anthropogenic pressure on the Mar Piccolo was eased, it could once again become the paradisiacal place it was held to be in ancient times.

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Section: Discussionmentioning

confidence: 99%

Successions of phytobenthos species in a Mediterranean transitional water system: the importance of long term observations

Petrocelli¹,

Cecere²,

Rubino³

2019

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“…During the oligotrophication process in Mediterranean lagoons, a decline in phytoplankton biomass is observed, accompanied by a shift in community structure and composition (Leruste et al 2016). In noneutrophicated conditions, shallow lagoons tend to be dominated by benthic primary producers, such as seagrasses, macroalgae and benthic microalgae rather than phytoplankton (Lloret & Marín 2009, Le Fur et al 2018.…”

Section: )mentioning

confidence: 99%

“…1). The studied lagoons are shallow water bodies; only 4 lagoons have a mean depth > 2 m: Leucate (the southern part), Thau, Diana, and Urbino (see Souchu et al 2010, Bec et al 2011and Le Fur et al 2018 for a Lagoons used to illustrate our study are underlined (Bages in green, Ayrolle in blue, Méjean in red and Grec in orange) more detailed overview of the catchment area characteristics of these lagoons). Some of these lagoons (i.e.…”

Section: Study Sitesmentioning

confidence: 99%

“…The major impacts of eutrophication include changes in the structure and functioning of marine ecosystems, reduction of biodiversity, as well as changes in the composition and size structure of phytoplankton communities (Bec et al 2011) and sessile organisms such as benthic fauna (Lloret & Marín 2011) and macrophytes. Concerning the latter point, the change of submerged aquatic vegetation along eutrophication gradients and its consequences on ecosystem functioning is well known (Harlin 1995, Valiela et al 1997, Schramm 1999, Viaroli et al 2008, Le Fur et al 2018. During the eutrophication process, ephemeral epiphytic macroalgae and fast growing opportunistic macroalgae (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Re-oligotrophication trajectories of macrophyte assemblages in Mediterranean coastal lagoons based on 17-year time-series

Fur¹,

Wit²,

Plus³

et al. 2019

Mar. Ecol. Prog. Ser.

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Since the mid-20th century, Mediterranean lagoons have been affected by eutrophication, leading to significant changes in primary producers. In the early 2000s, management actions have been implemented to reduce nutrient inputs with the aim to achieve a good ecological status as requested by the EU water framework directive. As a result of these actions, a sharp decline in nutrient loads has been recorded in several lagoons leading to an oligotrophication of the water column. The analyses of a long-term data set (1998−2015) of 21 polyhaline and euhaline lagoons with contrasting trophic status allowed us to infer a general scheme for the changes in macrophyte assemblages during the oligotrophication process. Placing hypertrophic and oligotrophic conditions end to end, we inferred that the general pattern for the re-oligotrophication trajectory in Mediterranean coastal lagoons is described by the following sequence, with regime shifts between each state: (1) bare non-vegetated sediments, phytoplankton-dominated state; (2) opportunistic macroalgae; (3) seagrass and perennial macroalgae dominated state. However, we did not observe the latter regime shift for the most eutrophicated lagoons, which, so far, remained stuck in the opportunistic macroalgae state. So far, the shift from dominance of opportunistic macroalgae to a system dominated by seagrasses was only observed in a single lagoon where seagrasses had never completely disappeared, which possibly relates to resilience. More generally, the conditions favoring regime shifts from opportunistic macroalgae to seagrasses are still poorly understood. In conclusion, we describe a generic pattern for re-oligotrophication of Mediterranean coastal lagoons, although a full recovery from highly eutrophied to oligotrophic conditions may require more than a decade and may include conditions that remain so far poorly recognized.

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“…They are expanses of shallow coastal water, of varying salinity and water volume, partially separated from the sea by sand banks or shingle, or, less frequently, by rocks (Hill et al, 2004). Salinity may vary from oligohaline to hyperhaline ranges depending on rainfall, freshwater inland and underground water supplies, evaporation and through the addition of fresh seawater from lagoons with a strong gradient from oligotrophic to hypertrophic states (Souchu et al, 2010 ;Bec et al, 2011 ;Leruste et al, 2016 ;Le Fur et al, 2017). Where conditions are favorable to eutrophication, the development of opportunistic macro-and micro-algae is observed with a marked change of primary producers (Schramm, 1999 ;Leruste et al, 2016 ;Le Fur et al, 2017).…”

Section: Three Coastal Case Studies: Sandy Beaches Mediterranean Coamentioning

confidence: 99%

How does eutrophication impact bundles of ecosystem services in multiple coastal habitats using state-and-transition models

Kermagoret

Claudet

Derolez

et al. 2019

Ocean & Coastal Management

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One of the current major scientific challenges to sustain social-ecological systems is to improve our understanding of the spatial and temporal dynamics of the relationships between biodiversity, ecosystem functioning and ecosystem services. Here, we analyse the bundles of ecosystem services supplied by three coastal ecosystems (coastal lagoons, coral reefs and sandy beaches) along a gradient of eutrophication. Based on a state-and-transition model, we analyses the dynamic responses of ecological communities to environmental change and management actions. Although few exceptions are highlighted, increasing eutrophication in the three ecosystem types leads to a degradation of the ecosystem service bundles, particularly for nutrient and pathogen regulation/sequestration, or for the support of recreational and leisure activities. Despite few obstacles to their full use, state-and-transition models can be very powerful frameworks to integrate multiple functions and services delivered by ecosystems while accounting for their temporal dynamics. Highlights► Gradients of eutrophication modify bundles of coastal ecosystem services. ► Nutrient and pathogen regulation as well as cultural services are particularly impacted. ► State-and-transition model is a powerful framework for environmental management. ► Managers can balance the few gains of eutrophication with the losses of ecosystem services.

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Submerged benthic macrophytes in Mediterranean lagoons: distribution patterns in relation to water chemistry and depth

Cited by 38 publications

References 85 publications

Successions of phytobenthos species in a Mediterranean transitional water system: the importance of long term observations

Successions of phytobenthos species in a Mediterranean transitional water system: the importance of long term observations

Re-oligotrophication trajectories of macrophyte assemblages in Mediterranean coastal lagoons based on 17-year time-series

How does eutrophication impact bundles of ecosystem services in multiple coastal habitats using state-and-transition models

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