Salinity strongly drives the survival, growth, leaf demography, and nutrient partitioning in seedlings of Xylocarpus granatum J. König

Siddique, Mohammad Raqibul Hasan; Saha, Sanjoy; Salekin, Serajis; Hossain, Mahmood

doi:10.3832/ifor2382-010

Cited by 16 publications

(6 citation statements)

References 33 publications

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“…In the same direction, R. mucronata has been reported to tolerate drought periods (Duke 2006;Robert et al 2015). Reduced leaf area of seedlings with increasing salinity, a trend that was observed with the four species studied here, confirms similar findings reported with other species (Ball 2002;Súarez & Medina 2005;Kathiresan 2007;Jayakody et al 2008;Kodikara et al 2017;Siddique et al 2017).…”

Section: Discussionsupporting

confidence: 89%

Response of mangrove plant species to a saline gradient: Implications for ecological restoration

Silva

Amarasinghe

2021

Acta Bot. Bras.

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Mangroves are salt tolerant plants that occur in tropical and sub-tropical sheltered coasts. Saltwater intrusions into terrestrial landscapes often occur due to either anthropogenic reasons or natural calamities such as tsunamis. We investigated the potential of using mangrove species for rehabilitation of high saline environments by revealing the capacities of species to remove salt from sediment. We established the salt retention capacity of common mangrove species in Sri Lanka i.e., Rhizophora apiculata, Rhizophora mucronata, Ceriops tagal, and Avicennia marina through exsitu and in-situ measurements of NaCl content in plant tissue and soil samples, by titrating with 0.01 N AgNO 3. The results revealed A. marina to be the most efficient in retaining salt within plant tissues while C. tagal is superior to R. mucronata but inferior to A. marina in performing this function. These findings were further confirmed by measuring salt uptake rates of hydroponically grown seedlings of the same species. Although R. mucronata is the most popular species used for restoration, A. marina appears the most suitable mangrove species not only for coastal mangrove restoration but also for rehabilitating salinity affected landscapes.

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Section: Discussionsupporting

confidence: 89%

Response of mangrove plant species to a saline gradient: Implications for ecological restoration

Silva

Amarasinghe

2021

Acta Bot. Bras.

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“…The slightly acidic to slightly neutral soil pH (6.5 to 7.2) in all mangrove sites are favorable for the growth of dominant mangroves (Mustapha et al 2016). The salinity level (<25 psu) in all mangrove areas are also favorable for the growth of mangrove seedlings, but the range of tolerance may depend upon on the adaptability of each dominant species (Chen and Ye 2014;Siddique et al 2017). The higher salinity level recorded in the seaward zones is attributed to the high salt concentration present in sea waters than the riverine waters.…”

Section: Discussionmentioning

confidence: 99%

Physicochemical factors influencing zonation patterns, niche width and tolerances of dominant mangroves in southern Oriental Mindoro, Philippines

Raganas

Magcale-Macandog

2020

Indo Pac J Ocean Life

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Abstract. Raganas AFM, Magcale-Macandog DBM. 2020. Physicochemical factors influencing zonation patterns, niche width, and tolerances of dominant mangroves in southern Oriental Mindoro, Philippines. Ocean Life 4: 51-62. Physicochemical factors are known for having strong influence on the spatial patterns and structural complexity of mangroves. In this regard, we aimed to contribute to filling up this information gap in the six mangrove ecosystems on the southern coast of Oriental Mindoro, Philippines. In each of the six mangrove ecosystems, the dominant mangrove species were identified in four mangrove zones - seaward, riverine, middle, and landward - using a stratified random sampling method for vegetation survey. Physicochemical parameters of water, air, and soil were also obtained from these ecozones. Results of the Principal Component Analysis revealed that temperature and water salinity are the factors that show strong influence on the spatial distribution of the dominant mangrove species. Canonical Correspondence Analysis revealed that Avicennia marina, Sonneratia alba, and Rhizophora apiculata, are species associated with a highly saline environment, while Xylocarpus granatum, Ceriops decandra, Avicennia rumphiana, and Rhizophora mucronata are species associated with low to optimum saline environment. Most of these dominant species preferred ecotypes with low to optimum salinity levels as revealed by their individual niche width and tolerances. The different adaptations and dominance of these mangrove species provide insights in the identification of appropriate species that could be used as planting materials for rehabilitation endeavors in the respective mangrove ecosystem.

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“…Although our study suggests positive correlation between site salinity and growth of mangrove species, some authors found negative correlation between salinity and growth of mangrove species. For instance, salinity of 25 psu in nursery conditions was found to be lethal for the growth of Xylocarpus granatum (Siddique et al 2017). Since salt tolerance is species speci c (Ye et al 2005) and age dependent (Kodikara et al 2018), divergence of correlation trends may be linked to species identity and life stage of individuals considered in experiments.…”

Section: Biomassmentioning

confidence: 99%

Survival, Growth, and Productivity of Rhizophora racemosa Transplanted in Natural Ecosystems: Implications for Mangrove Restoration

et al. 2022

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Mangroves are coastal wetland ecosystems of tropical and subtropical regions. Their development and trajectories are mainly driven by water and substrate salinities. Therefore, understanding how main mangrove species respond to salinity gradient when transplanted in natural environment is essential for their restoration. This study assessed the survival, growth, and productivity of Rhizophora racemosa seedlings in response to gradient of salinity. Seedlings were grown in nursery under low (3-5 psu) and medium (15-17 psu) water salinities for thirty days and transplanted to three mangrove sites with various salinities (4.6, 11.41, and 18.27 psu). Seedling survival and growth were monitored monthly for 6 months. At the end of month 6, total biomass was harvested and partitioned. Results showed that growth, survival, and productivity of R. racemosa were mainly in uenced not by the salinity under which the propagules were raised in nursery but rather by site. Survival was higher (88.33%) at the site with the highest salinity. Total plant biomass was similar across sites, but root biomass and root weight ratio were higher on sites with higher salinity. Biomass was disproportionately higher in stems (45-54%) than in roots (28-37%), and leaves (15-18%). We suggest that restoration is done in appropriate period, ideally one month before the start of rainy season not only to allow seedlings to well establish their rooting system in the substrate before rains start but also to favour seedling growth, because of substrate salinity dilution by fresh water from rains and ows from uplands.

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Salinity strongly drives the survival, growth, leaf demography, and nutrient partitioning in seedlings of Xylocarpus granatum J. König

Cited by 16 publications

References 33 publications

Response of mangrove plant species to a saline gradient: Implications for ecological restoration

Response of mangrove plant species to a saline gradient: Implications for ecological restoration

Physicochemical factors influencing zonation patterns, niche width and tolerances of dominant mangroves in southern Oriental Mindoro, Philippines

Survival, Growth, and Productivity of Rhizophora racemosa Transplanted in Natural Ecosystems: Implications for Mangrove Restoration

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