Biomass–density relationships of the seagrass Zostera noltii: A tool for monitoring anthropogenic nutrient disturbance

Cabaço, Susana; Machás, Raquel; Santos, Rui

doi:10.1016/j.ecss.2007.05.029

Cited by 32 publications

(17 citation statements)

References 33 publications

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“…Traditionally, most seagrass monitoring approaches have been based on the follow-up of changes in community based parameters such as bed composition, percent cover and biomass (Buia et al, 2004;Cabaç o et al, 2007). These descriptors, however, represent relatively slow responses to environmental changes (Marbà et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Assessing the ecological status of seagrasses using morphology, biochemical descriptors and microbial community analyses. A study in Halophila stipulacea (Forsk.) Aschers meadows in the northern Red Sea

Mejia

Rotini

Lacasella³

et al. 2016

Ecological Indicators

131

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Section: Introductionmentioning

confidence: 99%

Assessing the ecological status of seagrasses using morphology, biochemical descriptors and microbial community analyses. A study in Halophila stipulacea (Forsk.) Aschers meadows in the northern Red Sea

Mejia

Rotini

Lacasella³

et al. 2016

Ecological Indicators

131

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“…Moreover, after the publication of the WFD, plenty of methods have been published in Europe for angiosperm quality assess ment. Some of them focus on coastal species (Romero et al, 2007;Montefalcone, 2009), but many others have been imple mented for transitional and low-salinity coastal waters (KrauseJensen et al, 2005;Best et al, 2007b;Cabaco et al, 2007;Foden and de Jong, 2007;Selig et al, 2007;García et al, 2009). …”

Section: Angiospermsmentioning

confidence: 99%

Classifying Ecological Quality and Integrity of Estuaries

Borja¹,

Basset²,

Bricker³

et al. 2011

Treatise on Estuarine and Coastal Science

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There is an increasing need in assessing ecological quality and integrity of estuaries and lagoons. This chapter shows the most recent efforts in assessing individual biological elements (from phytoplankton to fishes), together with the integrative tools developed in different geographical areas worldwide. However, reducing complex information from multiple ecosystem elements to a single color or value is a substantial challenge to marine scientists, and requires the integration of different disciplines (chemists, engineers, biologists, ecologists, physics, managers, etc.), to reach agreement on the final assignment of ecological status. Hence, in the near future, emphasis needs to be directed at understanding the complexities of estuarine system functioning rather than simplifying and scaling down the system into smaller components. Provided for non-commercial research and educational use.Not for reproduction, distribution or commercial use.This chapter was originally published in Treatise on Estuarine and Coastal Science, published by Elsevier, and the attached copy is provided by Elsevier for the author's benefit and for the benefit of the author's institution, for noncommercial research and educational use including without limitation use in instruction at your institution, sending it to specific colleagues who you know, and providing a copy to your institution's administrator.All other uses, reproduction and distribution, including without limitation commercial reprints, selling or licensing copies or access, or posting on open internet sites, your personal or institution's website or repository, are prohibited.For exceptions, permission may be sought for such use through Elsevier's permissions site at: Author's personal copy AbstractThere is an increasing need in assessing ecological quality and integrity of estuaries and lagoons. This chapter shows the most recent efforts in assessing individual biological elements (from phytoplankton to fishes), together with the integrative tools developed in different geographical areas worldwide. However, reducing complex information from multiple ecosystem elements to a single color or value is a substantial challenge to marine scientists, and requires the integration of different disciplines (chemists, engineers, biologists, ecologists, physics, managers, etc.), to reach agreement on the final assignment of ecological status. Hence, in the near future, emphasis needs to be directed at understanding the complexities of estuarine system functioning rather than simplifying and scaling down the system into smaller components.

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“…Dynamics of the population structure was also different between the meadows, as indicated by the different time trajectories of biomass–density relationships. The similar slope of biomass–density linear relationships, indicative of comparable competition intensity, suggests that plants in the established and in the colonizing meadows were, in general, under similar nutritional conditions (Morris 2003) or that this difference was not big enough to be detected, as described for Z. noltii meadows (Cabaço et al. 2007) and for terrestrial plants subjected to higher nutrient levels (Morris & Myerscough 1985, 1991; Gibson & Goode 1986; Morris 1999, 2002).…”

Section: Discussionmentioning

confidence: 80%

Population dynamics and production of the seagrass Zostera noltii in colonizing versus established meadows

Cabaço

Santos

Sprung³

2011

Marine Ecology

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The dynamics of the seagrass Zostera noltii in established and colonizing meadows were assessed in Ria Formosa lagoon, Southern Portugal. Shoot weight, above:belowground biomass ratio, flowering shoot density, meadow production, and biomass–density relationships were investigated. Results indicate that the species population dynamics differ clearly in different development stages of the meadows. The overall mean of flowering shoot density was five times higher in the colonizing (83 flowering shoots m−2) than in the established meadow (16 flowering shoots m−2), revealing a greater contribution of sexual reproduction during the species colonization process. The temporal variation of the biomass–density relationship in the colonizing meadow showed a cyclic seasonal trajectory, a wider range of data, and a simultaneous peak of biomass and density, suggesting no space limitations constraining the internal packing of shoots during the growing season. In the established meadow, density peaked before biomass in agreement to the dominant role of the clonal architecture of seagrasses in the configuration of closed meadows, suggesting the occurrence of self‐thinning and/or regulation of ramet formation. Slope of the biomass–density relationships was similar in the established and colonizing meadows, generally suggesting similar nutritional conditions, regardless of their muddy and sandy sediments. Plants of the colonizing meadow invest mainly on the belowground fraction (above:belowground biomass ratio <1), as meadow expansion is mainly controlled by the elongation of horizontal rhizomes. The annual total production (1163 g C m−2 year−1) and the biomass turnover (34.8 year−1) were also higher in this meadow, corroborating the high investment of the species during the meadow expansion. The faster biomass turnover of the colonizing meadow implies a more limited capacity to accumulate biomass, indicating a greater exportation of organic carbon and nutrients to the coastal area. The different biomass turnover rates suggest different trophic and structural roles of Z. noltii communities in established and colonizing meadows.

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Biomass–density relationships of the seagrass Zostera noltii: A tool for monitoring anthropogenic nutrient disturbance

Cited by 32 publications

References 33 publications

Assessing the ecological status of seagrasses using morphology, biochemical descriptors and microbial community analyses. A study in Halophila stipulacea (Forsk.) Aschers meadows in the northern Red Sea

Assessing the ecological status of seagrasses using morphology, biochemical descriptors and microbial community analyses. A study in Halophila stipulacea (Forsk.) Aschers meadows in the northern Red Sea

Classifying Ecological Quality and Integrity of Estuaries

Population dynamics and production of the seagrass Zostera noltii in colonizing versus established meadows

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