Seagrass litter decomposition: an additional nutrient source to shallow coastal waters

Prasad, M.H.K.; Ganguly, Dipnarayan; Paneerselvam, A.; Ramachandran, Ramesh

doi:10.1007/s10661-018-7127-z

Cited by 17 publications

(5 citation statements)

References 49 publications

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“…Estudos sugerem (PRASAD et al, 2019;SIMARD et al, 2019;OSLAND et al, 2017;FERNANDES;CARVALHO, 2007;MEHLIG, 2006) que a alta produção de frutos no manguezal em meses mais chuvosos pode contribuir para a dispersão dos propágulos e sementes das espécies, utilizando a precipitação e a dinâmica de marés como mecanismos para a reprodução e ciclagem de nutrientes.…”

Section: Resultsunclassified

“…O entendimento da variação pluviométrica e dos sistemas meteorológicos precipitantes contribui para o entendimento da produção de serapilheira, sua variabilidade e sua exportação para áreas adjacentes por meio da dinâmica de marés (PRASAD et al, 2019). As espécies arbóreas do manguezal estão inseridas em um complexo sistema de ciclagem de nutrientes, que, por intermédio da produção de serapilheira, fornecem ao ecossistema elementos nutritivos que auxiliam na sua manutenção (LARCHER et al, 2014;MCHENGA;ALI, 2017;HOQUE et al, 2015).…”

Section: Introductionunclassified

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Influência De Sistemas Precipitantes Sobre a Produção De Serapilheira Em Manguezal Da Costa Amazônica

Souza

Vitorino

Vasconcelos

et al. 2019

Rev. Bras. Ciênc. Ambient. (Online)

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Manguezais são ecossistemas com significativa relevância ambiental e socioeconômica,e o conhecimento da relação ecológica desse ecossistema com a atmosfera é defundamental importância para sua preservação e para o uso sustentável dos recursosnaturais. Diante disso, este estudo tem como objetivos analisar os sistemas meteorológicosprecipitantes e sua variação pluviométrica sazonal sobre a costa amazônica, bem comoexaminar sua influência na variabilidade da produção de serapilheira de floresta demangue. Delimitaram-se três parcelas amostrais com 12 coletores de serapilheira de 1 m2no manguezal do Sítio Experimental de Cuiarana. Classificaram-se as coletas realizadasmensalmente em folha, lenhoso, material reprodutivo e miscelânea. Utilizaram-sedados de precipitação pluvial com base na Torre Micrometeorológica e na técnicaCPC MORPHing Technique (CMORPH). Utilizaram-se as análises two-way e one-wayde variância (ANOVA) (p < 0,05) e análise de regressão linear (p < 0,05). Os resultadosindicam que a variação temporal da precipitação é modulada por diferentes sistemasmeteorológicos. A produção total anual de serapilheira foi de 9,4 ± 0,06 Mg ha-1 ano-1,da qual 67% compunha-se de fração folha. As análises da fração folha total e folha daespécie L. racemosa apresentaram correlação significativa com a precipitação (r2 = 0,36e r2 = 0,72; p < 0,05), respectivamente. Diante dos resultados, conclui-se que a produçãode serapilheira do manguezal possui direta relação com os sistemas precipitantes.

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Section: Resultsunclassified

Section: Introductionunclassified

Influência De Sistemas Precipitantes Sobre a Produção De Serapilheira Em Manguezal Da Costa Amazônica

Souza

Vitorino

Vasconcelos

et al. 2019

Rev. Bras. Ciênc. Ambient. (Online)

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“…While the role of sandy beaches in the processing of organic matter and nutrient cycling has been repeatedly demonstrated, the question of whether beaches function as sources or sinks of nutrients remains largely unanswered, and there are differences among nutrient species and locations (e.g. Cockcroft & McLachlan, 1993 ; Goodridge & Melack, 2014 ; Prasad et al ., 2019 ). Supporting the ‘sink’ hypothesis, buried beach‐cast kelp ( Fucus spp.)…”

Section: The Current State Of Knowledgementioning

confidence: 99%

The role of inputs of marine wrack and carrion in sandy‐beach ecosystems: a global review

et al. 2022

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Sandy beaches are iconic interfaces that functionally link the ocean with the land via the flow of organic matter from the sea. These cross-ecosystem fluxes often comprise uprooted seagrass and dislodged macroalgae that can form substantial accumulations of detritus, termed 'wrack', on sandy beaches. In addition, the tissue of the carcasses of marine animals that regularly wash up on beaches form a rich food source ('carrion') for a diversity of scavenging animals. Here, we provide a global review of how wrack and carrion provide spatial subsidies that shape the structure and functioning of sandy-beach ecosystems (sandy beaches and adjacent surf zones), which typically have little in situ primary production. We also examine the spatial scaling of the influence of these processes across the broader land-and seascape, and identify key gaps in our knowledge to guide future research directions and priorities. Large quantities of detrital kelp and seagrass can flow into sandy-beach ecosystems, where microbial decomposers and animals process it. The rates of wrack supply and its retention are influenced by the oceanographic processes that transport it, the geomorphology and landscape context of the recipient beaches, and the condition, life history and morphological characteristics of the macrophyte taxa that are the ultimate source of wrack. When retained in beach ecosystems, wrack often creates hotspots of microbial metabolism, secondary productivity, biodiversity, and nutrient remineralization. Nutrients are produced during wrack breakdown, and these can return to coastal waters in surface flows (swash) and aquifers discharging into the subtidal surf. Beach-cast kelp often plays a key trophic role, being an abundant and preferred food source for mobile, semi-aquatic invertebrates that channel imported algal matter to predatory invertebrates, fish, and birds. The role of beach-cast marine carrion is likely to be underestimated, as it can be consumed rapidly by highly mobile scavengers (e.g. foxes, coyotes, raptors, vultures). These consumers become important vectors in transferring marine productivity inland, thereby linking marine and terrestrial ecosystems. Whilst deposits of organic matter on sandy-beach ecosystems underpin a range of ecosystem functions and services, they can be at variance with aesthetic perceptions resulting in widespread activities, such as 'beach cleaning and grooming'. This practice diminishes the energetic base of food webs, intertidal fauna, and biodiversity. Global declines in seagrass beds and kelp forests (linked to global warming) are predicted to cause substantial reductions in the amounts of marine organic matter reaching many beach ecosystems, likely causing flow-on effects for food webs and biodiversity. Similarly, future sea-level rise and increased storm frequency are likely to alter profoundly the physical attributes of beaches, which in turn can change the rates at which beaches retain and process the influxes of wrack and animal carcasses. Conservation of the multi-faceted eco...

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“…While the role of sandy beaches in the processing of organic matter and nutrient cycling has been repeatedly demonstrated, the question of whether beaches function as sources or sinks of nutrients remains largely unanswered, and there are differences among nutrient species and locations (e.g. Cockcroft & McLachlan, 1993;Goodridge & Melack, 2014;Prasad et al, 2019).…”

Section: (D) Nutrient Fluxes and Chemical Transformationmentioning

confidence: 99%

Flotsam and jetsam: a global review of the role of inputs of marine organic matter in sandy beach ecosystems

Hyndes¹,

Berdan²,

Duarte³

et al. 2021

Preprint

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Sandy beaches are iconic interfaces that functionally link the ocean with the land by the flow of marine organic matter. These cross-ecosystem fluxes often comprise uprooted seagrass and dislodged macroalgae that can form substantial accumulations of detritus, termed ‘wrack’, on sandy beaches. In addition, the tissue of the carcasses of marine animals that regularly wash up on beaches form a rich food source (‘carrion’) for a diversity of scavenging animals. Here, we provide a global review of how wrack and carrion provide spatial subsidies that shape the structure and functioning of sandy beach ecosystems (sandy beaches and adjacent surf zones), which typically have little in situ primary production. We also examime the spatial scaling of the influence of these processes across the broader seascape and landscape, and identify key gaps in our knowledge to guide future research directions and priorities. Globally, large quantities of detrital kelp and seagrass can flow into sandy beach ecosystems, where microbial decomposers and animals remineralise and consume the imported organic matter. The supply and retention of wrack are influenced by the oceanographic processes that transport it, the geomorphology and landscape context of the recipient beaches, and the condition, life history and morphological characteristics of the taxa that are the ultimate source of wrack. When retained in beach ecosystems, wrack often creates hotspots of microbial metabolism, secondary productivity, biodiversity, and nutrient remineralization. Nutrients are produced during wrack break-down, and these can return to coastal waters in surface flows (swash) and the aquifier discharging into the subtidal surf. Beach-cast kelp often plays a key trophic role, being an abundant and preferred food source for mobile, semi-aquatic invertebrates that channel imported algal matter to predatory invertebrates, fish, and birds. The role of beach-cast marine carrion is likely to be underestimated, as it can be consumed rapidly by highly mobile scavengers (e.g. foxes, coyotes, raptors, vultures). These consumers become important vectors in transferring marine productivity inland, thereby linking marine and terrestrial ecosystems. Whilst deposits of organic matter on sandy beach ecosystems underpin a range of ecosystem functions and services, these can be at variance with aesthetic perceptions resulting in widespread activities, such ‘beach cleaning and grooming’. This practice diminishes the energetic base of food webs, intertidal fauna, and biodiversity. Global declines in seagrass beds and kelp forests (linked to global warming) are predicted to cause substantial reductions in the amounts of marine organic matter reaching many beach ecosystems, likely causing flow-on effects on food webs and biodiversity. Similarly, future sea-level rise and stormier seas are likely to profoundly alter the physical attributes of beaches, which in turn can change the rates at which beaches retain and process the influxes of wrack and animal carcasses. Conservation of the multi-faceted ecosystem services that sandy beaches provide will increasingly need to encompass a greater societal appreciation and the safeguarding of ecological functions reliant on beach-cast organic matter on innumerable ocean shores worldwide.

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Seagrass litter decomposition: an additional nutrient source to shallow coastal waters

Cited by 17 publications

References 49 publications

Influência De Sistemas Precipitantes Sobre a Produção De Serapilheira Em Manguezal Da Costa Amazônica

Influência De Sistemas Precipitantes Sobre a Produção De Serapilheira Em Manguezal Da Costa Amazônica

The role of inputs of marine wrack and carrion in sandy‐beach ecosystems: a global review

Flotsam and jetsam: a global review of the role of inputs of marine organic matter in sandy beach ecosystems

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