Trophic connectivity and basal food sources sustaining tropical aquatic consumers along a mangrove to ocean gradient

Claudino, Marlucy Coelho; Pessanha, André Luiz Machado; Araújo, Francisco Gerson; Garcia, Alexandre

doi:10.1016/j.ecss.2015.07.005

Cited by 63 publications

(30 citation statements)

References 48 publications

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“…2). These results support the findings of previous studies wherein food sources of terrestrial origin were the major sources to the primary consumers in the upper estuary, whereas phytoplankton and food sources of marine origin became important in the lower estuary (Lautenschlager et al 2014;Careddu et al 2015;Claudino et al 2015). Based on previous studies on mangrove ecosystems, sesarmid crabs appear to consume plant materials directly or indirectly (Bouillon et al 2004) and exhibit high feeding activity on sediment (Skov and Hartnoll 2002).…”

Section: Discussionsupporting

confidence: 90%

Intraspecific diet shifts of the sesarmid crab, Sesarma dehaani, in three wetlands in the Han River estuary, South Korea

Yang

Han

2019

j ecology environ

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Background: Han River estuary is a national wetland reserve near the Demilitarized Zone (DMZ) between South Korea and North Korea. This trans-boundary estuary area has been well preserved and shows distinctive plant communities along the salinity gradient. To elucidate energy flows and nutrient cycling in this area, we studied trophic relations between the dominant sesarmid crab, Sesarma dehaani, and food sources in three wetlands with different environments along the estuarine gradients. Results: Stable isotope signatures (δ 13 C and δ 15 N) of the crabs were significantly different among the sites and body size classes. Seasonal changes in δ 13 C of small crabs were distinct from those of large individuals at all the sites. The isotopic values and fatty acid profiles of the crabs were more different among the sites in September than in May. In May, large-sized crabs utilized more plant materials compared to other dietary sources in contrast to small-sized crabs as revealed by a stable isotope mixing modeling, whereas contributions to diets of crabs were not dominated by a specific diet for different body size in September except at site 1. Based on PCA loadings, fatty acid content of 18:3ω3, known as a biomarker of plant materials, was the main factor to separate size groups of crabs in May and September. The δ 13 C value of sediment had high correlation with those of small-sized crabs at site 1 and 2 when 1-month time lag was applied to the value for crabs during the surveyed period. Conclusions: Based on the stable isotope and fatty acid results, the consumption habits of S. dehaani appear to be distinguished by sites and their size. In particular, smaller size of S. dehaani appears to be more dependent on fewer food sources and is influenced more by the diet sources from the sediments in Han River estuary.

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Section: Discussionsupporting

confidence: 90%

Intraspecific diet shifts of the sesarmid crab, Sesarma dehaani, in three wetlands in the Han River estuary, South Korea

Yang

Han

2019

j ecology environ

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“…Therefore, our findings reinforce that spatial heterogeneity is an important factor that influence fish feeding habits. With regards to the macrofauna and zooplankton in Mamanguape estuary, some studies have shown a distribution pattern at different spatial scales (Nobrega-Silva et al, 2016;Moura et al, 2016;Linden et al, 2017), which has an important role in this food web (Campos et al, 2015;Claudino et al, 2015;Figueiredo, Pessanha 2016).…”

Section: Discussionmentioning

confidence: 99%

“…The Brazilian Silverside, Atherinella brasiliensis (Quoy & Gaimard, 1854), is a common estuarine resident and generalist species and is abundant in estuaries (Neves et al, 2006;Alves et al, 2016) and others nearshore shallow water ecosystems, as such beaches (Chagas, Junior, 2013;Lacerda et al, 2014;Favero, Dias, 2015), coastal lagoons (Andreata, 2012) and bays (Paiva Filho, Gianinni, 1990;Pessanha, Araújo, 2001;Carvalho, Spach, 2015). Furthermore, A. brasiliensis, show its important in a key structuring role in estuarine food webs (Campos et al, 2015;Figueiredo, Pessanha, 2016), because generalist species are able to feeding and exploit quantitatively on prey from multiple basal nutrient sources (Claudino et al, 2015). Generally, zooplankton, insects, diatoms form the principal diet of Brazilian silversides in estuaries (Contente et al, 2011;Alves et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Intraspecific food resource partitioning in Brazilian silverside Atherinella brasiliensis (Atheriniformes: Atherinopsidae) in a tropical estuary, Brazil

et al. 2019

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We investigated the intraspecific partitioning of food resources of the Brazilian silverside Atherinella brasiliensis in a tropical estuary. A total of 1,099 stomachs were analyzed, and the diet consisted mainly of Gastropoda, Ceratopogonidae larvae, Decapoda larvae, Calanoida, Cyclopoida, Hymenoptera and Brachyura. Ordination of the mean volumetric percentage contribution of preys indicated differences in the dietary compositions between sites and size classes. By SIMPER analysis, we detected high dissimilarity between size classes, suggesting ontogenetic niche shifts: the diet of the early juveniles was based in zooplankton, whereas adults consumed mainly benthic macroinvertebrates. These shifts were related to changes in feeding structures and foraging abilities that show a strong relationship with body size, and showed functional trade-offs in swimming capacity, and feeding strategies used to capture prey. Differences in the diet between size classes and habitat selection by Brazilian silverside are likely strategies to avoid intraspecific competition, clearly related to the abundance and accessibility of resources along the estuarine habitats.Nós investigamos a partição intraespecífica de recursos alimentares do peixe-rei Atherinella brasiliensis em um estuário tropical. Um total de 1.099 estômagos foi analisado, e a dieta foi constituída principalmente de Gastropoda, Larva de Ceratopogonidae, Larva de Decapoda, Calanoida, Cyclopoida, Hymenoptera e Brachyura. A análise de ordenação da contribuição do volume das presas indicou diferenças na composição da dieta entre locais e classes de tamanho. Pela análise do SIMPER, nós detectamos alta dissimilaridade entre as classes de tamanho, sugerindo mudanças ontogenéticas: a dieta dos indivíduos menores foi baseada em zooplâncton, enquanto os maiores indivíduos consumiram principalmente macroinvertebrados bentônicos. Essas variações foram relacionadas com mudanças nas estruturas para captura do alimento e na habilidade de forrageamento que evidenciaram uma forte relação com o tamanho do corpo, e mostraram trade-offs funcionais na capacidade de natação e no modo de captura das presas. Diferenças na dieta entre as classes e a seleção de habitat pelo peixe-rei são estratégias para evitar a competição intraespecífica, claramente relacionada com a abundância e a acessibilidade dos recursos alimentares ao longo dos habitats estuarinos. Palavras-chave:Áreas costeiras, Estratégia Trófica, Heterogeneidade de habitat.

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“…Apesar de serem considerados como base das teias tróficas estuarinas, os fragmentos vegetais, têm sido relatados em ecossistemas tropicais e temperados como fontes de alimento somente para alguns invertebrados bentônicos, como caranguejos e gastrópodes (Bouillon et al, 2002a(Bouillon et al, , 2002bCorbisier et al, 2006;Claudino et al, 2015 Di Beneditto et al, 2012;Muto et al, 2014b;Senn et al, 2010). Indicando o potencial uso deste marcador para as regiões em avaliações de acumulação de contaminantes químicos, assim como para estudos ecológicos aplicados (Bearhop et al, 2000;Das et al, 2004;Di Beneditto et al, 2012;Kehrig et al, 2013Kehrig et al, , 2016Muto et al, 2014b).…”

Section: Resultados Semelhantes Aos Do Presente Estudo Foram Verificaunclassified

“…Além disso, em analises tróficas e de bioacumulação, os sedimentos são indicadores de fonte de matéria orgânica para a teia trófica estudada (Claudino et al, 2015;Corbisier et al, 2006).…”

Section: Introductionunclassified

Bioacumulação e biomagnificação de metais pesados em teias tróficas de estuários do sul-sudeste do Brasil

Trevizani¹

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Trophic connectivity and basal food sources sustaining tropical aquatic consumers along a mangrove to ocean gradient

Cited by 63 publications

References 48 publications

Intraspecific diet shifts of the sesarmid crab, Sesarma dehaani, in three wetlands in the Han River estuary, South Korea

Intraspecific diet shifts of the sesarmid crab, Sesarma dehaani, in three wetlands in the Han River estuary, South Korea

Intraspecific food resource partitioning in Brazilian silverside Atherinella brasiliensis (Atheriniformes: Atherinopsidae) in a tropical estuary, Brazil

Bioacumulação e biomagnificação de metais pesados em teias tróficas de estuários do sul-sudeste do Brasil

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