Lost connectivity between a coastal lagoon and the sea – implications of floodgate closure for benthic macroinvertebrates

Obolewski, Krystian; Glińska-Lewczuk, Katarzyna; Astel, Aleksander

doi:10.1016/j.ecss.2018.02.012

Cited by 14 publications

(8 citation statements)

References 41 publications

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“…Variability in community composition of bacteria and meiofauna suggest that deterministic (i.e., environmental selection) and stochastic (i.e., passive dispersal) processes differently influenced the assembly of bacterial and meiofauna communities in bays exposed to boating disturbances. While adding to previous reports that showed negative impacts of boating activity on aquatic organisms ( 10 , 11 , 19 ), our results provide the first step toward understanding the responses of sediment bacteria and metazoan communities to recreational boating. This could aid in guiding management efforts aimed at protecting and managing biodiversity in coastal ecosystems and to consider overall openness and wave exposure.…”

Section: Discussionsupporting

confidence: 59%

“…In comparison with open waters, soft sediment bottoms in coastal marine environments are greatly impacted by multiple anthropogenic stressors in terms of habitat degradation and biodiversity loss ( 7 , 8 ). A growing body of literature shows a decrease in macrophytes, macroinvertebrates, and fish communities in the degraded habitats (such as low resilience and reduced ecosystem services) ( 9 – 11 ).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Recreational Boating on Microbial and Meiofauna Diversity in Coastal Shallow Ecosystems of the Baltic Sea

Iburg

Shen

Austin

et al. 2021

mSphere

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Section: Discussionsupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Effects of Recreational Boating on Microbial and Meiofauna Diversity in Coastal Shallow Ecosystems of the Baltic Sea

Iburg

Shen

Austin

et al. 2021

mSphere

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“…In South Africa, breaching by river flooding leads to population crashes that do not recover until closure (Whitfield et al 2012). However, as we found in LPL, proximity to the mouth determines variability and response to breaching for most taxa; these breaching effects are mediated by salinity and microphytobenthic biomass in Brazil (Netto et al 2012) and by chlorophyll a, pH, and salinity in the Baltic (Obolewski et al 2018). Notably, closure can also lead to harmful algal blooms and onset of hypoxia (e.g., Lemley and Adams 2020;Harvey et al 2022).…”

Section: Mouth Status and Community Structurementioning

confidence: 60%

“…Breaching of a temporarily closed estuary in southern Brazil led to an initial 90% loss of macroinvertebrate density and 50% loss of biomass but limited effect on diversity (Netto et al 2012). In the Southern Baltic, Jamno Lagoon loss of seawater inflow triggered 50% loss of invertebrate density and 60% loss of biomass, but no effect on Shannon diversity (Obolewski et al 2018). In South Africa, breaching by river flooding leads to population crashes that do not recover until closure (Whitfield et al 2012).…”

Section: Mouth Status and Community Structurementioning

confidence: 99%

Consequences of Mouth Closure and Hypoxia-Induced State Changes in Low-Inflow Estuaries: Benthic Community and Trait-Based Response

Levin

Mendoza

Neira

et al. 2022

Estuaries and Coasts

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The southern California coastline hosts low-inflow estuaries that have mouths that periodically close. Low-inflow estuaries can become hypoxic and are then often opened mechanically. The consequences of mouth closure and hypoxia (< 2 mg L−1 O2) on macrobenthic densities, species richness, diversity, composition, and biological traits were evaluated for legacy data generated by the Pacific Estuarine Research Lab for Los Peñasquitos Lagoon (LPL) (1991–2006) and Tijuana Estuary (TJE) (1988–2004). LPL closed at least annually and TJE remained open during the study period. Effects were moderated by zone within the estuary (relative to the mouth) and season. Periodic closure in LPL was associated with raised macrofaunal density and diversity, especially at the mouth, and with suppressed seasonality. Closure favored soft-bodied (non-calcified) non-bioturbating, mobile, epifaunal taxa in LPL with planktotrophic development, large branchiae, and no vision. There were more spionid and capitellid polychaetes, Traskorchestia traskiana, Cerithideopsis californica, Tagelus californianus, and phoronids during closure. In contrast, hypoxia (< 2 mg L−1) measured during faunal sampling was associated with lower densities in LPL and different taxonomic composition, but no difference in taxon richness or diversity. There were more corophiid amphipods, small snails, tubificid oligochaetes, Palaemon macrodactylus (shrimp), and Trichorixa reticulata (insects) under hypoxic conditions, and retention of taxa with very large or small bodies and with vision. TJE densities were nearly double those of LPL; taxon richness and diversity (H’) were also higher in TJE. TJE hosted more burrowing, large-bodied, highly calcified taxa with planktotrophic development and no vision than LPL. Differences in composition and traits between the two estuaries disappeared in the middle and upper reaches, where ocean flushing was more limited. Historical long-term monitoring data for benthos, such as the data set analyzed here, offer a valuable baseline for evaluating ecosystem response to changes induced by climate, infrastructure development, contamination, or restoration.

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“…The high trophic state of Baltic coastal lakes was reported many times [ 28 , 47 , 48 ]. Taking into account the specificity of saline conditions, the coastal habitats with a small number of species and low diversity should be carefully assessed as severely degraded.…”

Section: Discussionmentioning

confidence: 99%

Salinity as a Key Factor on the Benthic Fauna Diversity in the Coastal Lakes

Mrozińska

Glińska-Lewczuk

Obolewski

2021

Animals

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Benthic communities were studied in nine Polish coastal lakes of the Baltic Sea; representing three levels of hydrological connection with the sea (isolated, periodically connected, and permanently connected), with resultant differences in salinity (freshwater, transitional, and brackish). The lakes classified in this way allowed us to investigate biodiversity in relation to the degree of environmental pressure. Stress intensity in coastal water bodies, resulting from contrasting marine and terrestrial influences, varied from mild to severe. Spatial variation in environmental predictors affected species richness more strongly than seasonal fluctuations. The broader the spatial salinity gradient, the smaller the species number recorded. Differences in the intensity of natural instability only slightly affected species number and α-diversity. In Baltic coastal lakes, characterized by low salinity (max. 7.5 PSU), benthic faunal communities were dominated by large populations of opportunistic species. This applied primarily to closed systems and those periodically influenced by seawater intrusion. The marine component of fauna played a more important role in increasing the diversity of benthos in permanently open water bodies (brackish). The highest density of benthic fauna was recorded in them, whereas low values were associated with the strongest instability, observed in lakes periodically linked with the sea (transitional).

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Lost connectivity between a coastal lagoon and the sea – implications of floodgate closure for benthic macroinvertebrates

Cited by 14 publications

References 41 publications

Effects of Recreational Boating on Microbial and Meiofauna Diversity in Coastal Shallow Ecosystems of the Baltic Sea

Effects of Recreational Boating on Microbial and Meiofauna Diversity in Coastal Shallow Ecosystems of the Baltic Sea

Consequences of Mouth Closure and Hypoxia-Induced State Changes in Low-Inflow Estuaries: Benthic Community and Trait-Based Response

Salinity as a Key Factor on the Benthic Fauna Diversity in the Coastal Lakes

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