Chapter 2 Physical Setting and Geomorphology of Coastal Lagoons

Bird, Eric

doi:10.1016/s0422-9894(08)70007-2

Cited by 98 publications

(66 citation statements)

References 14 publications

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“…Coastal lagoons are often sub-divided into choked, restricted, leaky [1] and even open [5] with respect to the characteristics of their hydrodynamic exchange properties with the adjacent open sea. The WFD/2000/60/EC does not include an explicit definition of lagoons, but the definition of transitional waters (TW) specifies a salinity gradient and significant freshwater inputs [6].…”

Section: Introductionmentioning

confidence: 99%

Environmental Variability and Macrophyte Assemblages in Coastal Lagoon Types of Western Greece (Mediterranean Sea)

Christia

Giordani

Papastergiadou

2018

Water

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Coastal lagoon types of Western Greece were allocated to a spectrum of meso to polyhaline chocked lagoons; poly to euhaline restricted lagoons; and euhaline restricted lagoons along the Ionian Sea coast. This diversity comprises wide ranges of physical, chemical and environmental parameters in a seasonal and annual scale, which explains the variability in the distribution of benthic macrophytes. Four different macrophyte assemblages were distinguished, characterized by annual or perennial species. Extensive statistical analysis showed that salinity and nitrate concentrations had a great impact on the composition and distribution of macrophyte assemblages into lagoon types that also changed their abundance on a seasonal and annual scale. During the monitoring period, an important salinity shift in a chocked lagoon might cause the gradual loss of Zostera noltii and its replacement by Ruppia cirrhosa. Restricted lagoons were characterized by higher species diversity, while the other three identified macrophyte assemblages were dominated by the angiosperms Ruppia cirrhosa and Cymodocea nodosa. This integrated study of coastal lagoons is likely to be broadly applicable, since it was based on important parameters affecting such ecosystems, and the provided links between macrophyte assemblages and abiotic factors are of critical importance to improve management and environmental policies.

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Section: Introductionmentioning

confidence: 99%

Environmental Variability and Macrophyte Assemblages in Coastal Lagoon Types of Western Greece (Mediterranean Sea)

Christia

Giordani

Papastergiadou

2018

Water

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“…The coastal barrier beaches, which separate the lagoons from the ocean, are dynamic systems that naturally migrate landwards along undeveloped shorelines with moderate rates of sea level rise (Hayes 2005). Natural migration of the coastal barrier and lagoon shorelines will be impeded in areas that are hardened, which could result in loss of lagoon habitat and may increase vulnerability of man-made coastal structures to storm damage (Titus 1998 (Zimmerman 1981, Bird 1994, Mackenzie et al 2007, Lloret et al 2008, Anthony et al 2009.…”

Section: Coastal Lagoons (Salt Ponds) Will Warmmentioning

confidence: 99%

Multidecadal Trends in Atmospheric and Ocean Conditions in Offshore Waters Near Cape Cod, Massachusetts

Smith

2017

Northeastern Naturalist

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“…Thus, coastal lagoons can be precisely defined as shallow aquatic ecosystems that develop at the interface between coastal terrestrial and marine ecosystems and can be permanently open or intermittently closed off from the adjacent sea by depositional barriers (Kjerfve, 1994;Gönenç and Wolflin, 2004). Water can span the range of salinities from hypersaline to completely fresh depending on the relative strength of the particular drivers of their hydrological balance, such as local precipitation, watershed inflow, evaporation and sea-water intrusion by percolation through, or overtopping of, the sand barrier (Bird, 1994;Smith, 1994).…”

Section: Definition and Geomorphology Of Coastal Lagoonsmentioning

confidence: 99%

“…There are other less representative kinds of coastal lagoons, such as temporary systems formed during the rainy seasons, as ponded waters in depressions on soft sedimentary shores. A complete appreciation about the coastal lagoon geomorphology can be accessed in Bird (1994).…”

Section: Introductionmentioning

confidence: 99%

Neotropical coastal lagoons: an appraisal of their biodiversity, functioning, threats and conservation management

et al. 2008

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Neotropical coastal lagoons (NCL) are human-dominated ecosystems. Their distribution along densely populated coastal areas of developing countries makes these systems among the most threatened in the world. Here, we summarize some aspects of the causes and consequences of NCL biodiversity, their functioning, their importance to the surrounding populations, their fragility, and their responses to local and global anthropogenic impacts and the challenges that Neotropical countries face in conserving these systems. Although still scarce and geographically concentrated, a growing body of studies has shown that NCLs are physiographically diversified systems, which harbor a considerable and particular proportion of the Neotropical inland aquatic biodiversity. Despite the fact that coastal lagoons are ecotones that are intricately connected to surrounding environments, they develop mechanisms for structural and functional regulation, which confer to these systems higher productivity and carrying capacities than surrounding ecosystems. Such traits attract residential developments and subsidize local traditional populations with important economic and aesthetic ecosystem revenues such as fisheries and scenic beauty. However, the disorganized human occupation around NCLs are causing profound impacts such as eutrophication, salinization, exotic species introduction, as well as other effects, which are ultimately imposing major habitat degradations and biodiversity extirpations in NCLs. We argue that interdisciplinary conservation strategies, which integrate scientific expertise, government officials, private companies and the general public, are the most likely to overcome the geographic and economic obstacles to NCL conservation.Keywords: coastal ecosystems, ecosystem management, shallow lakes, human impacts, tropical limnology.Lagoas costeiras neotropicais: Uma apreciação sobre sua biodiversidade, funcionamento, principais ameaças e estratégias de conservação ResumoAs lagoas costeiras neotropicais (LCN) estão inseridas em um ambiente antropogênico. Sua localização em regiões costeiras densamente povoadas de países em desenvolvimento coloca estes ecossistemas entre os mais impactados do mundo. Neste trabalho, resumimos vários aspectos relacionados às causas e conseqüências da sua biodiversidade, seu funcionamento e os bens proporcionados à população do seu entorno. Sua fragilidade e as respostas a impactos humanos locais e globais, assim como os desafios para a sua conservação por países neotropicais, também são abordados. Apesar de escassos e geograficamente concentrados, um número crescente de estudos tem mostrado que as LCN são sistemas fisiograficamente diversificados, abrigando uma proporção considerável da biodiversidade dos ambientes aquáticos continentais neotropicais. Apesar de as lagoas costeiras representarem ecótonos bastante conectados ao ambiente adjacente, elas desenvolveram mecanismos próprios de regulação funcional e estrutural, conferindo uma maior produtividade e capacidade de suporte em relação...

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Chapter 2 Physical Setting and Geomorphology of Coastal Lagoons

Cited by 98 publications

References 14 publications

Environmental Variability and Macrophyte Assemblages in Coastal Lagoon Types of Western Greece (Mediterranean Sea)

Environmental Variability and Macrophyte Assemblages in Coastal Lagoon Types of Western Greece (Mediterranean Sea)

Multidecadal Trends in Atmospheric and Ocean Conditions in Offshore Waters Near Cape Cod, Massachusetts

Neotropical coastal lagoons: an appraisal of their biodiversity, functioning, threats and conservation management

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