Mangroves and seagrasses

Hogarth, Peter J.

doi:10.1093/acprof:oso/9780198568704.003.0001

Cited by 63 publications

(98 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The salinity range that mangrove plants are able to tolerate in the field varies according to the species and it depends on the ability to maintain high water use efficiency (Reef & Lovelock 2015). For example, Avicennia marina demonstrates extreme salt tolerance (Kirui et al 2008), Rhizophora mucronata shows relatively high salt tolerance whilst species such as Bruguiera sexangula, Sonneratia caseolaris, and Aegiceras corniculatum show moderate or low salt tolerance (Hogarth 2007;Jayatissa et al 2008). In addition to survival and growth, the effects of salinity on tissue water potential, physiological aspects like stomatal conductance and the role of inorganic ions in influencing mangrove seedling response to different salinity levels have all been reported (Smith & Snedaker 1995;Aziz & Khan 2001a;b;Reef & Lovelock 2015).…”

Section: Introductionmentioning

confidence: 99%

The effects of salinity on growth and survival of mangrove seedlings changes with age

et al. 2017

View full text Add to dashboard Cite

Six wide-ranging mangrove species, Rhizophora apiculata, R. mucronata, Avicennia marina, A. offi cinalis, Bruguiera gymnorrhiza, and B. sexangula, were selected to study the growth and survival of seedlings under three contrasting salinity treatments over a 30-week period: low (3-5psu), moderate (15-17psu) and high (33-36psu). Seedlings grown under high salinity exhibited signifi cantly lower performance (p<0.05) in survival rates, cumulative shoot height, mean growth rates, mean total leaf area, and mean dry weight, compared to those under low and moderate salinity regimes. Th e low salinity treatment provided the best conditions for initial establishment and growth of the seedlings of all species until 15-20 weeks of age. However, the same seedlings showed better performance under moderate salinity after 15-20 weeks of age (shift in optimal salinity), implying that adaptation to salt and physiological needs of mangrove seedlings varies with age. Th ese results have practical implications of use in raising up mangrove nurse species for planting since it indicates that seedlings should get low salinity water until four to fi ve months of age and then moderately saline water, in order to achieve maximum growth and survival.

show abstract

Section: Introductionmentioning

confidence: 99%

The effects of salinity on growth and survival of mangrove seedlings changes with age

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Rhizophora mangle usually occurs in areas close to the sea or in river margins (Tomlinson 1994, Hogarth 2007. It is a dominant species in the study area, occurring also in the mangrove-'terra firme' ecotone, with an average density of Flowering and fruiting occur throughout the year, with both phenophases having their peaks in the rainy season (Nadia et al 2012).…”

Section: Study Site and Species Studiedmentioning

confidence: 99%

“…True mangroves live exclusively in the ecosystem known as mangal, and they comprise approximately 55 plant species of 20 genera and 16 families (Tomlinson 1994, Hogarth 2007. These species form dense forests, sometimes monospecific, which play an important role in soil stabilization and primary production, increasing the productivity of nearby communities (Grasso and Tognella 1995, Mantovani 2002, Hogarth 2007.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Wind pollination and propagule formation in Rhizophora mangle L. (Rhizophoraceae): resource or pollination limitation?

Nadia

Machado

2014

An. Acad. Bras. Ciênc.

View full text Add to dashboard Cite

Rhizophora mangle is considered as a self-compatible mangrove, and is pollinated by wind and insects. However, there is no information about fruit production by autogamy and agamospermy and on the foraging behavior of its flower visitors. Hence, the present study analyzed the pollination and reproductive systems of R. mangle in a mangrove community in northern Pernambuco, Brazil. Floral morphology, sequence of anthesis, and behavior of flower visitors were described; the proportion of flowers that resulted in mature propagules was also recorded. Autogamy, agamospermy, and wind pollination tests were performed, and a new anemophily index is proposed. The flowers of R. mangle are hermaphrodite, protandric, and have high P/O rate. Flies were observed on flowers only during the male phase, probably feeding on mites that consume pollen. Rhizophora mangle is not agamospermic and its fruit production rate by spontaneous self-pollination is low (2.56%) compared to wind pollination (19.44%). The anemophily index was high 0.98, and thus it was considered as a good indicator. Only 13.79% of the flowers formed mature propagules. The early stages of fruit development are the most critical and susceptible to predation. Rhizophora mangle is, therefore, exclusively anemophilous in the study area and the propagule dispersal seems to be limited by herbivory.

show abstract

“…Evaluation of such ecosystem services of mangroves and their economic evaluation are yet unrevealed, although several literatures are available on the use of mangroves as nursery and breeding ground of fishes, sources of timber, honey, wax, firewood etc. [4][5][6][7][8][9][10][11][12][13]. Considering the importance of mangroves as primary service providers to coastal populations and island dwellers, it is extremely important to assess the biodiversity and relate the same with the anthropogenic and natural threats existing in and around the habitats.…”

Section: Introductionmentioning

confidence: 99%

Shannon Weiner Index: A Proxy to Evaluate the Floral Health of Indian Sundarbans

Bhattacharyya¹

2015

IJIRSET

View full text Add to dashboard Cite

ABSTRACT:We assessed the Shannon Weiner species diversity index of true mangroves in Indian Sundarbans during 2000, 2006 and 2012 considering the natural-cum-anthropogenic threats along with conservation strategies operating in and around the ten selected sampling stations. Our analysis revealed pronounced spatio-temporal variations, which may be attributed primarily due to anthropogenic pressure that is more predominant in stations like Canning, Harinbari, Chemaguri and Sagar south. The adverse impact of hypersalinity on the diversity of true mangroves also surfaced out from this first order analysis.

show abstract

Mangroves and seagrasses

Cited by 63 publications

References 0 publications

The effects of salinity on growth and survival of mangrove seedlings changes with age

The effects of salinity on growth and survival of mangrove seedlings changes with age

Wind pollination and propagule formation in Rhizophora mangle L. (Rhizophoraceae): resource or pollination limitation?

Shannon Weiner Index: A Proxy to Evaluate the Floral Health of Indian Sundarbans

Contact Info

Product

Resources

About