Leaching of dissolved organic carbon (DOC) from dead leaves, formation of flakes from DOC, and feeding on flakes by crustaceans in mangroves

Camilleri, J. C.; Ribi, Georg

doi:10.1007/bf00428627

Cited by 63 publications

(24 citation statements)

References 49 publications

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“…The average leaching rates are comparable to leaching rates of total phenols (on average 2.4 mgC day -1 ) reported by Maie and Jaffe (2006), and dissolved organic carbon (on average 10 mgC day -1 ) reported by Camilleri and Ribi (1986). Conversion of reported leaching rates followed an empirical relation between root dry mass and root length reported by .…”

Section: Recruitment Experimentssupporting

confidence: 75%

Mangrove-sponge associations: a possible role for tannins

et al. 2009

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A positive correlation between sponge coverage and tannin concentrations in prop roots of Rhizophora mangle L. has previously been reported. However, the ecological role of tannins within the mangrove sponge association remains speculative. This study investigated whether tannins play a role in sponge recruitment and assessed tannin and polyphenol production in R. mangle roots in response to sponge colonization. We demonstrated in a field experiment using artificial substrates with different tannin concentrations that tannins are positively involved in larval recruitment of the sponge Tedania ignis and that roots significantly enhanced tannin and polyphenolic content in response to natural and experimental sponge fouling. Differential recruitment in response to tannins may have been the result of a behavioral response in sponge larvae. It is also possible that tannins affected the structure of the fouling microbial biofilm on the artificial substrate, or tannins affected the post-settlement dynamics of sponge recruits. Elevations in concentrations of tannins and polyphenolic compounds upon coverage with sponges, combined with differential recruitment of T. ignis in response to differences in tannin concentrations, may indicate a positive feedback in recruitment. This may in part explain the typical heterogeneity in sponge coverage and community composition among roots.

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Section: Recruitment Experimentssupporting

confidence: 75%

Mangrove-sponge associations: a possible role for tannins

et al. 2009

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“…The dominance of DOC as compared to POC in mangrove ecosystems has recently been stressed by a number of authors [e.g., Dittmar et al, 2001;Davis et al, 2001;Kristensen and Suraswadi, 2002]. Mangrove litter has been found to leach a significant fraction of its dry weight as dissolved organic matter during the initial stages of degradation (e.g., 30% after 9 days [see Camilleri and Ribi, 1986]), and the conversion of this DOC into microbial biomass has been shown to be fast and efficient [Benner et al, 1986]. A local origin of this DOC would also be consistent with the abrupt local changes occurring in the intensity of mineralization (as inferred from, e.g., the % O 2 and pCO 2 patterns) of organic matter in the mangrove creeks compared to the marine/estuarine part of the Godavari and the adjacent bay.…”

Section: Sources and Distribution Of Organic Carbonmentioning

confidence: 99%

Inorganic and organic carbon biogeochemistry in the Gautami Godavari estuary (Andhra Pradesh, India) during pre‐monsoon: The local impact of extensive mangrove forests

Bouillon

Frankignoulle

Dehairs

et al. 2003

Global Biogeochemical Cycles

150

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[1] The distribution and sources of organic and inorganic carbon were studied in the Gautami Godavari estuary (Andhra Pradesh, India) and in a mangrove ecosystem in its delta during pre-monsoon. In the oligohaline and mesohaline section (salinity 0-15) of the estuary, internal production of total alkalinity (TAlk) and dissolved inorganic carbon (DIC) was recorded, and the d 13 C DIC profile suggests that carbonate dissolution may be an important process determining the DIC dynamics in this section of the Godavari. The partial pressure of CO 2 (pCO 2 ) was fairly low along the entire salinity gradient, (293-500 ppm), but much higher and more variable (1375-6437 ppm) in the network of tidal mangrove creeks in the delta. Here, variations in the concentration and d 13 C of the DIC pool were shown to result largely from the mineralization of organic matter. The present study clearly identifies the mangrove creeks as an active site of mineralization and CO 2 efflux to the atmosphere, but shows that these changes in the aquatic biogeochemistry are a localized feature, rapidly fading in the adjacent Kakinada Bay. Our data indicate that mineralization of dissolved organic carbon (DOC) of mangrove origin, and its subsequent efflux as CO 2 to the atmosphere may represent an important fate for mangrove carbon. Although further quantification of this process in a variety of systems is required, we suggest that some of the current ideas on the role of mangroves in the carbon budget of the coastal zone may need to be reconsidered. INDEX TERMS: 4235

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“…The preference for aged leaves over freshly fallen leaves in Bruguiera gymnorhiza and Rhizophora stylosa and the use of brown leaves in Avicennia marina can be explained by three hypotheses: (1) Unpalatable materials are removed from the leaf during the process of ageing, e.g. tannins may gradually leach out of leaves into seawater (Cundall et al 1979, Camilleri and Ribi 1986, Neilson et al 1986, Robertson 1988. Tannin concentrations are high in leaves of B. gymnorhiza (14.6%) variable in R. stylosa (4.9 to 17%) and low in A. marina (3.5%) (Kuthubutheen 1981, Robertson 1988.…”

Section: Leaf Features and Leaf Choicementioning

confidence: 99%

Leaf choice by crustaceans in a mangrove forest in Queensland

Camilleri¹

1989

Mar. Biol.

111

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The feeding behaviour of leaf eating crustaceans feeding on leaves shed by Avicennia marina, Bruguiera gymnorhiza and Rhizophora stylosa in the mangrove forest at Myora Springs, Queensland, Australia was studied between 1980 and 1984.Individual Sesarma erythrodactyla (carapace > 9 mm long), one of the most abundant species of crabs in the forest, processed approximately half a leaf from any of the three species of mangroves in 24 h under laboratory conditions. Of the amount of leaf material processed, 20% was lost from the mandibles due to "sloppy feeding", 68% was egested as faeces and 12% converted into crab biomass. Crabs processed more leaf material at 30 °C than at 20 °C. S. erythrodactyla preferred leaves of A. marina to those of the other two species, probably because leaves of A. marina have a lower tannin and a higher nitrogen content. Of the other two species, B. gymnorhiza was preferred to R. stylosa. Among leaves of R. stylosa, S. erythrodactyla exerts a strong preference for aged rather than freshly fallen, and for thick rather than thin leaves. The mesofauna (carapace length < 9.0 ram) which processed dead mangrove leaves comprised juveniles of S. erythrodactyla, the crab Ilyograpsus paludicola, the isopod Exosphaeroma alata and the amphipods Orchestia sp. and Melita sp. These species processed between 0.2 and 24.7 mg dry wt of a leaf per individual over a period of 4 d. Of this, 72 to 85% was egested as faeces. The significance of leaf eating crabs to nutrient cycling in mangrove forests is discussed. I conclude that leaf processing by crustaceans shortens the time span between leaf fall and consumption of leaf material by organisms. This may have the effect of conserving leaf biomass inside the mangrove forest.

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Leaching of dissolved organic carbon (DOC) from dead leaves, formation of flakes from DOC, and feeding on flakes by crustaceans in mangroves

Cited by 63 publications

References 49 publications

Mangrove-sponge associations: a possible role for tannins

Mangrove-sponge associations: a possible role for tannins

Inorganic and organic carbon biogeochemistry in the Gautami Godavari estuary (Andhra Pradesh, India) during pre‐monsoon: The local impact of extensive mangrove forests

Leaf choice by crustaceans in a mangrove forest in Queensland

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