Growth responses of the mangrove Avicennia marina to salinity: development and function of shoot hydraulic systems require saline conditions

Nguyen, Hoa; Stanton, Daniel E.; Schmitz, Nele; Farquhar, Graham D.; Ball, Marilyn C.

doi:10.1093/aob/mcu257

Cited by 111 publications

(68 citation statements)

References 52 publications

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“…The effect of salinity on mangrove is a controversial issue due to variations in site International Journal of Biodiversity 5 salinities. Salinity was reported as a necessity for the better growth of mangrove [47] while other scholars considered mangrove insensitive to wide ranges of salinity fluctuations [10,48,49]. In our study, negative correlation existed between tree heights and EC (−0.9) and between trunk diameters and EC (−1.0), although not significant, probably due to a small sample size.…”

Section: Community Structurecontrasting

confidence: 61%

Structure and Composition of Mangrove Associations in Tubli Bay of Bahrain as Affected by Municipal Wastewater Discharge and Anthropogenic Sedimentation

Seedo

Abido

Salih

et al. 2017

International Journal of Biodiversity

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The effects of municipal wastewater discharge and anthropogenic sedimentation on the structure and composition of gray mangrove (Avicennia marina (Forsk.) Vierh.) communities along Tubli Bay coastlines in Bahrain were investigated. Growth and regeneration of mangrove were measured, and its community was characterized. Sediment profile was analyzed for texture, pH, and salinity. Mangrove area covered by sand depositions was measured using Google Earth Pro. ANOVA and regression tests were employed in the analysis of the data. Results indicated that mangrove overwhelmingly dominated plant community in the study area, which was zoned by a community of other salt-tolerant species. Three main habitats exist in the study area with high similarity in their floristic composition. Species richness and the number of habitats were low due to the aridity and high sediment salinity. The dilution effect of the secondary treated wastewater had a favorable effect on height and diameters of mangrove trees. However, no differences were observed in leaf area index, basal area, and density of mangrove. The long-term accumulation of anthropogenic sedimentation had a detrimental effect on the mangrove community, expressed in swath death of mangrove trees due to root burials and formation of high topography within the community boundaries.

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Section: Community Structurecontrasting

confidence: 61%

Structure and Composition of Mangrove Associations in Tubli Bay of Bahrain as Affected by Municipal Wastewater Discharge and Anthropogenic Sedimentation

Seedo

Abido

Salih

et al. 2017

International Journal of Biodiversity

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“…It is a hardy species in natural conditions and regenerates quickly from coppices, both as individuals and as a species. It is a colonizing species on newly formed mudflats and has a high tolerance to hypersaline conditions [21]. However, in the present study A. marina seedling absent in all station.…”

Section: Abundancecontrasting

confidence: 56%

Isolation Hope and Threat of Mangrove Restoration Program in Bogowonto Lagoon, Yogyakarta - Indonesia (2002-2014)

Firaswan¹,

Aryandari²,

Reza³

et al. 2017

KLS

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Bogowonto Lagoon has the largest mangrove ecosystem in southern coast of Yogyakarta, Indonesia. Several activities on mangrove restoration have been conducted to escalate this remnant mangrove forest area. Conversely, rapid increase of shrimp pond area become threat for mangrove ecosystem in Bogowonto lagoon since the early of 21 st century. Hence, This study is aimed to investigate mangrove composition, distribution and abundance, progress of mangrove restoration program and shrimp pond extensification in 2002 to 2014. Conducted from April 2015 to May 2015, this research consists of several steps namely survey, vegetation analysis, literature study, sociological study using questionnaire, measurement of mangrove and shrimp pond area using Landsat 8 imageries and Arc GIS 10.1. We determined 15 sites along Bogowonto Lagoon using random sampling by quadratic plot (10 m × 10 m for tree, 5 m × 5 m for sapling) and total counts (for seedling). The result showed that there were seven species of mangrove and six species of associate mangrove. Rhizopora mucronata Lamb. was dominant in each growthform with clumped distribution. R. mucronata and Avicennia marina (Forssk.) Vierh. also dominate from backswamp to rivermouth. Satellite imageries revealed that there was a hope due to upward trends of mangrove area in last 12 yr (approximately 5 ha). However, the significant increase sof shrimp pond area (approximately 34 ha) surrounding mangrove area become current and future threat. Based on sociological study, most of people around Bogowonto Lagoon have high awareness, but less participated on mangrove restoration program. Besides, the river mouth covered by sand become another obstacle of it.

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“…Under 35:35 salinity conditions, a turnover of 2 % of the stem water occurred within 1 h following treatment application. In seedlings of A. marina growing under similar salinity conditions, xylem vessel lumen area makes up~3 % of the stem area (Nguyen et al 2015;Reef et al 2012), thus it is likely that the rapid change in isotopic composition of the stem water represents the Leaf water content in all treatments increased within 1 h of treatment delivery and remained significantly higher than T 0 for the next 48 h turnover of the xylem pool. However, 24 h following the treatment application a turnover of 15 % of stem water occurred, indicating that within this time frame, assimilation of isotopically enriched water into other tissue types such as parenchyma had occurred, which could suggest water storage.…”

Section: Discussionmentioning

confidence: 99%

The response of the mangrove Avicennia marina to heterogeneous salinity measured using a split-root approach

et al. 2015

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Aims To investigate the physiological processes underlying freshwater utilisation in halophytes under nonuniform salinity conditions in order to determine whether preferential uptake of freshwater occurs and whether transient freshwater availability improves plant water relations and photosynthesis Methods In a split-root experiment, we grew Avicennia marina (Forssk.) Vierh. at uniform salinity conditions (35:35 ppt) and then lowered (35:5 ppt) or increased (35:65 ppt) salinity to one compartment. Using δ 18 Olabelled water we calculated the extent of preferential water uptake of either source. Results When given a 35:5 treatment, A. marina tookup three times more water from the fresher compartment than predicted by a root-weighted-no-salinitypreference model. No difference between compartments was observed in the 35:65 treatment, suggesting that avoidance of the more saline water did not occur. In the 35:5 treatment, stomatal conductance increased within 1.5 h, but photosynthetic rates were not enhanced over the 48-h period of the experiment and rapidly decreased in the 35:65 treatment. Conclusions Avicennia marina responds to transient freshwater patches by increasing water uptake from areas of the root zone where the salinity is better for growth. However, photosynthetic rates respond to the highest salinity in the root zone; thus, reductions in salinity in part of the root zone may enhance water storage in stem tissues but positive effects on photosynthesis may require longer periods.

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Growth responses of the mangrove Avicennia marina to salinity: development and function of shoot hydraulic systems require saline conditions

Cited by 111 publications

References 52 publications

Structure and Composition of Mangrove Associations in Tubli Bay of Bahrain as Affected by Municipal Wastewater Discharge and Anthropogenic Sedimentation

Structure and Composition of Mangrove Associations in Tubli Bay of Bahrain as Affected by Municipal Wastewater Discharge and Anthropogenic Sedimentation

Isolation Hope and Threat of Mangrove Restoration Program in Bogowonto Lagoon, Yogyakarta - Indonesia (2002-2014)

The response of the mangrove Avicennia marina to heterogeneous salinity measured using a split-root approach

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