Biogeochemistry of Mangrove Soil Organic Matter: a Comparison BetweenRhizophoraandAvicenniaSoils in South-eastern Brazil

Lacerda, Luiz Drude de; Ittekkot, V.; Patchineelam, Sambasiva R.

doi:10.1006/ecss.1995.0048

Cited by 125 publications

(81 citation statements)

References 19 publications

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“…Higher export from forests dominated by Avicennia sp., compared to those dominated by Rhizophora sp., has been observed in Brazil and related to different detritus decomposition rates (Lacerda et al, 1995). Moreover, the differing seasonal patterns recorded in Gazi Bay for A. marina and R. mucronata litterfall further corroborate this point: A. marina litterfall is higher in the rainy season than in the dry (Ochieng and Erftemeijer, 2002), while R. mucronata litterfall is the opposite (Slim et al, 1996).…”

Section: Export Of Mangrove Organic Mattersupporting

confidence: 64%

“…Indeed, the Mkurumuji River is characterised by high water flows in the south-western part of the bay peaking at 16.7 m 3 s −1 during the rainy season (Kitheka et al, 1996) and a large catchment area covered by dense C 4 vegetation and fewer mangrove trees (Bouillon et al, 2007). The combined highest δ 13 C and C : N values of SPOM found in the seagrass beds in the rainy season corroborate this assumption, since C 4 plants have higher δ 13 C and C : N ratio than mangroves (Lamb et al, 2006). This may also have affected mixing model outcomes, which revealed a lower mangrove contribution to both SOM and SPOM in these stations, in contrast to FA results.…”

Section: Export Of Mangrove Organic Mattermentioning

confidence: 73%

“…Bouillon et al, 2003;Vizzini and Mazzola, 2008;Walton et al, 2014). This is because C : N ratio and δ 13 C composition of the different organic matter sources contributing to sedimentary and suspended particulate pools are often markedly distinct Lamb et al, 2006). Nevertheless, this dual approach has a number of constraints, such as the lowering effect of decomposition on C : N ratio (Bosire et al, 2005;Dunn et al, 2008;Kennedy et al, 2004) or the potential overlapping of basal source isotopic signatures (Fry and Sherr, 1989), which may complicate inferences in coastal areas where autochthonous and allochthonous materials mix.…”

Section: Introductionmentioning

confidence: 99%

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Small-scale variability in geomorphological settings influences mangrove-derived organic matter export in a tropical bay

et al. 2017

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Abstract. Organic matter (OM) exchanges between adjacent habitats affect the dynamics and functioning of coastal systems, as well as the role of the different primary producers as energy and nutrient sources in food webs. Elemental (C, N, C : N) and isotope (δ 13 C) signatures and fatty acid (FA) profiles were used to assess the influence of geomorphological setting in two climatic seasons on the export and fate of mangrove OM across a tidally influenced tropical area, Gazi Bay (Kenya). The main results indicate that tidal transport, along with riverine runoff, plays a significant role in the distribution of mangrove organic matter. In particular, a marked spatial variability in the export of organic matter from mangroves to adjacent habitats was due to the different settings of the creeks flowing into the bay. Kinondo Creek acted as a mangrove retention site, where export of mangrove material was limited to the contiguous intertidal area, while Kidogoweni Creek acted as a "flow-through" system, from which mangrove material spreads into the bay, especially in the rainy season. This pattern was evident from the isotopic signature of primary producers, which were more 13 C-depleted in the Kinondo Creek and nearby, due to the lower dilution of the dissolved inorganic carbon (DIC) pool, typically depleted as an effect of intense mangrove mineralisation. Despite the trapping efficiency of the seagrass canopy, suspended particulate OM showed the important contribution of mangroves across the whole bay, up to the coral reef, as an effect of the strong ebb tide. Overall, mixing model outcomes indicated a widespread mixed contribution of both allochthonous and autochthonous OM sources across Gazi Bay. Moreover, FAs indicated a notable contribution of brown macroalgae and bacteria in both sediment and suspended pools. These results suggest that ecological connectivity in Gazi Bay is strongly influenced by geomorphological setting, which may have far-reaching consequences for the functioning of the whole ecosystem and the local food webs.

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Section: Export Of Mangrove Organic Mattersupporting

confidence: 64%

Section: Export Of Mangrove Organic Mattermentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

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Small-scale variability in geomorphological settings influences mangrove-derived organic matter export in a tropical bay

et al. 2017

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“…Na estação 4, foi observado o maior percentual deste parâmetro, o que parece refletir o maior desenvolvimento estrutural da floresta de mangue (Silva et al 2005) e menor influência das marés. De acordo com Lacerda et al (1995), o material orgânico presente no sedimento de Avicennia schaueriana é mais degradável quando comparado ao de Rhizophora mangle. Dessa forma, a matéria orgânica associada ao sedimento de Avicennia apresentaria taxa mais elevada de decomposição e, conseqüentemente, melhor reciclagem e disponibilidade de nutrientes, conforme observado no presente estudo (estação 2).…”

Section: Discussionunclassified

Composição química do sedimento e de folhas das espécies do manguezal do estuário do Rio São Mateus, Espírito Santo, Brasil

Bernini¹,

Silva²,

Carmo³

et al. 2006

Rev. bras. Bot.

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-(Chemical composition of sediments and leaves of mangrove species at the São Mateus river estuary, Espírito Santo State, Brazil). We analyzed nutrient concentrations in leaves and sediments, and element accumulation capacity in foliar tissues of Avicennia germinans (L.) Stearn., Avicennia schaueriana Staft & Leechm., Laguncularia racemosa (L.) Gaertn. f. and Rhizophora mangle L. in four sites along the São Mateus River estuary mangrove, Espírito Santo State, SE-Brazil. In sediment, elements decrease following the sequence: Mg > Ca > Fe > K > Mn > P > Zn > Cu and showed inter and intraespecific variation. Avicennia leaves showed the greatest N, K and Mg concentrations and lowest Ca concentrations. Rhizophora mangle presented the greatest Mn concentration, and Laguncularia racemosa the greatest Fe level. Sediment nutrient concentrations reflected the influence of granulometry in this compartment. Nutrient accumulation in leaves varied according to species and study site but it was not correlated with sediment concentrations. Results confirmed the mangrove role as a biogeochemistry barrier blocking heavy metal up to tropical coastal areas. However, it is necessary periodic sampling so that it can be possible a better understanding of the nutrient dynamic.Key words -heavy metals, leaves, mangrove, nutrients RESUMO -(Composição química do sedimento e de folhas das espécies do manguezal do estuário do Rio São Mateus, Espírito Santo, Brasil). As concentrações de nutrientes das folhas e do sedimento e a capacidade de acumulação de elementos químicos dos tecidos foliares das espécies Avicennia germinans (L.) Stearn., Avicennia schaueriana Staft & Leechm., Laguncularia racemosa (L.) Gaertn. f. e Rhizophora mangle L. foram analisadas em quatro estações de estudo no manguezal do estuário do Rio São Mateus, no Estado do Espírito Santo. De modo geral, os elementos determinados no sedimento seguiram a ordem: Mg > Ca > Fe > K > Mn > P > Zn > Cu, apresentando variações inter e intraespecíficas. No tecido foliar, as espécies de Avicennia apresentaram maiores teores de N, K e Mg e menores concentrações de Ca. Rhizophora mangle exibiu maior concentração de Mn e Laguncularia racemosa, maior teor de Fe em relação às demais espécies. Os resultados demonstraram que a concentração de nutrientes do sedimento refletiu a influência da granulometria neste compartimento. O acúmulo de nutrientes nas folhas variou de acordo com a espécie e estação de estudo, mas não refletiu as concentrações do sedimento. Os dados confirmaram o papel do manguezal como barreira biogeoquímica ao trânsito de metais pesados. Entretanto, torna-se desejável uma amostragem periódica para um melhor entendimento da dinâmica de nutrientes.Palavras-chave -folhas, manguezal, metais pesados, nutrientes IntroduçãoO conhecimento da dinâmica e da estrutura dos ecossistemas demanda a compreensão dos teores de nutrientes, sua distribuição nas plantas e no solo, processos de ciclagem e fluxos de entrada e de saída (Hay & Lacerda 1984). A comunidade vegetal representa p...

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“…2) pertain to mangrove systems and to the small, shallow, confined lagoon in the centre of Lys Island. Mangrove marine intertidal mud flats show a particular biogeochemistry (see Lacerda et al 1995, Otero et al 2006). …”

Section: Results and Conclusionmentioning

confidence: 99%

Nutrient status in coral reefs of the Îles Eparses (Scattered Islands): comparison to nearby reefs subject to higher anthropogenic influences (Mozambique Channel and Mascarenes, Indian Ocean)

Riaux-Gobin

Witkowski

Saenz‐Agudelo

et al. 2011

Oceanological and Hydrobiological Studies

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Indian Ocean coral reef environments off Mascarenes (Réunion and Rodrigues Islands), Comores archipelago (Mayotte) and Eparses atolls (Europa, Glorieuses, Juan de Nova and Tromelin), were sampled in 2007 and 2009 for environmental parameters and benthic diatoms studies. This preliminary note documents the nutrient concentrations [NO3 -, NO2 -, PO4 -and Si(OH)4] of coastal waters in diverse sites and examines the possible relationship between nutrient concentration and anthropogenic pressure. The pool of data is restricted, but the 1 corresponding author: catherine.gobin@univ-perp.fr marine coastal environments of Réunion, Rodrigues and Mayotte exhibit, on average, higher levels of nutrient concentration, as compared to Eparses atolls, probably in relation to the degree of urbanisation. A project based on the study of benthic diatom assemblages will offer the opportunity to search for possible anthropogenic signatures.

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Biogeochemistry of Mangrove Soil Organic Matter: a Comparison BetweenRhizophoraandAvicenniaSoils in South-eastern Brazil

Cited by 125 publications

References 19 publications

Small-scale variability in geomorphological settings influences mangrove-derived organic matter export in a tropical bay

Small-scale variability in geomorphological settings influences mangrove-derived organic matter export in a tropical bay

Composição química do sedimento e de folhas das espécies do manguezal do estuário do Rio São Mateus, Espírito Santo, Brasil

Nutrient status in coral reefs of the Îles Eparses (Scattered Islands): comparison to nearby reefs subject to higher anthropogenic influences (Mozambique Channel and Mascarenes, Indian Ocean)

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