Vertical distribution and feeding types of nematodes from Chetumal Bay, Quintana Roo, Mexico

Jesús‐Navarrete, Alberto de; Herrera-Gómez, Jaqueline

doi:10.1007/bf02692210

Cited by 9 publications

(9 citation statements)

References 16 publications

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“…The trophic composition of the nematode community in the Parangipettai shelf, where epistratum feeders (coarse sand) and deposit feeders (fine sand) were found to be dominant in the present study, is a response to enhanced food availability produced by high organic matter in sediment. Similar observations have also been made for the Chetumal Bay off the coast of Mexico where high levels of organic matter resulted in higher abundance of deposit feeders and epistratum feeders (de Jesus‐Navarrete & Herrera‐Gomez ). These authors also found that coarse sandy sediment can sustain higher nematode densities than other types of sediment, thereby promoting the dominance of epistratum feeders and deposit feeders due to increased availability of food.…”

Section: Discussionmentioning

confidence: 97%

“…Feeding types 1A and 1B (deposit feeding nematodes) contributed to the second and third most dominant feeding groups, respectively. Major contribution (in terms of density) of selective deposit feeding nematode genera like Halalaimus , Tricoma and Trifusia and non‐selective deposit feeders like Metalinhomoeus , Thalassomonhystera , Daptonema and Sabatieria indicated that they responded to increased amounts of fresh organic materials available in sediment as also reported from other studies (de Jesus‐Navarrete & Herrera‐Gomez ; Vanaverbeke et al . ,b).…”

Section: Discussionmentioning

confidence: 99%

“…In the present study, nematode density was found to be higher in the upper sediment layer (70.1%). Previous studies have also shown that marine nematodes and other meiofaunal groups occupy the topmost sediment layer based on vertical distribution profiles (Olafsson & Elmgren ; de Jesus‐Navarrete & Herrera‐Gomez ). These results could be due to active migration of the community (Vanaverbeke et al .…”

Section: Discussionmentioning

confidence: 99%

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Diversity patterns of free‐living marine nematodes in the southwest continental shelf off Bay of Bengal and their link to abiotic variables

et al. 2015

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Marine sediments in continental shelf ecosystems harbor a rich biodiversity of benthic communities. In this study, the spatial and temporal diversity and community assemblages of free-living marine nematodes were studied by sampling at six depths and over 3 years from the southwest continental shelf off Bay of Bengal, one of the least explored tropical shelf ecosystems. The dominant marine nematode species were related with abiotic variables as part of this study. The effects of sediment granulometry generally decreased with increasing depth and the highest nematode density and species diversity were recorded on coarse sand (shallower depths). Multivariate analysis of the nematode community data showed that community structure differed significantly among depths as well as among years. Statistical analyses showed significant correlations between the nematode community and abiotic variables. Sediment texture, organic matter, water pressure and depth profile were crucial factors for determining diversity, vertical profile and feeding types of the nematode community. Other environmental factors, including anthropogenic pressure, did not have an effect on nematode diversity except for the presence of some tolerant species (Metachromadora spp., Sabatieria spp. and Siplophorella sp.). This study represents a baseline of knowledge of free-living marine nematode communities that can be used in the future to compare nematode assemblages from temperate shelf ecosystems.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Diversity patterns of free‐living marine nematodes in the southwest continental shelf off Bay of Bengal and their link to abiotic variables

et al. 2015

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“…Meanwhile, they can stimulate the production of microorganisms and accelerate the degradation of organic matter. Therefore, marine nematodes play an important role in nutrient recycling and energy flow of whole benthic ecosystem (Nicholas, 2006;Wieser, 1953Wieser, , 1960De Jesús-Navarrete and Herrera-Gómez, 2002;. Marine nematodes are considered as the most abundant metazoan component of the deep-sea meiofauna (Jensen, 1988;Tietjen, 1992) and their numerical dominance increases with water depth (up to more than 90%; Thiel, 1975;Heip et al, 1985;Lambshead, 2004).…”

Section: Introductionmentioning

confidence: 97%

Community structure and biodiversity of free-living marine nematodes in the northern South China Sea

Liu

Zhang

et al. 2015

Acta Oceanol. Sin.

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A quantitative study on the community structure and biodiversity of free-living marine nematodes and their relationship with environmental factors in the northern South China Sea were carried out based on the samples collected at five stations in the deep sea (from 313 to 1 600 m) and one station in shallow waters (87 m) during the cruise in September, 2010. Results showed that the abundance of marine nematodes ranged from 224 to 1 996 ind./(10 cm 2 ). A total of 69 free-living marine nematode genera, belonging to 26 families and three orders, were identified. The most dominant genera were Sabatieria, Linhystera, Aegialoalaimus and Daptonema according to SIMPER analysis. Results of CLUSTER analysis revealed four types of marine nematode community (or station groups) in the sampling area. In terms of trophic structure, non-selective deposit feeders (1B) and selective deposit feeders (1A) were the dominant trophic types with highest genera numbers and abundances, which implied that organic detritus was the main food source of marine nematodes in the northern South China Sea. The percentage of male nematode was low, ranging from 2.22% to 17.81%, while those of juvenile individuals ranged from 36.99% to 82.09%. For genera level diversity of marine nematodes, Shannon-Wiener diversity indices (H') ranged from 3.76 to 4.57 and had highly significant negative correlation with water depth. In general, diversity indices H' at the five stations in deep sea (over 200 m) were lower than that at the station in shallow waters (87 m). BIOENV analysis showed that the most important environmental factor controlling marine nematode communities was water depth.

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“…Moodley et al (1998), while studying oxygen consumption by benthic infauna, and Sutherland et al (2007), studying organic enrichment in the sediment, detected the highest benthic densities in the superficial layers. De Jesus-Navarrete and Herrera- Gomez (2002) found the highest Nematoda densities in the 0-2 cm stratum. Meiofauna density variations in the experimental areas were clearly related to chemical alterations in the environment, led by the microphytobenthic changes previously mentioned.…”

Section: Discussionmentioning

confidence: 88%

Response of estuarine meiofauna assemblage to effects of fertilizer enrichment used in the sugar cane monoculture. Pernambuco, Brazil

et al. 2009

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In situ application of inorganic fertilizer was used to simulate environmental eutrophication associated with the sugar cane monoculture. Meiofauna community structure is herein used to assess this experimental impact. Nine quadrangular areas (4m² each) were randomly defined in the midlittoral estuarine area. Three of these areas received a high dose of sugar cane fertilizer (375 g/m² Nitrogen-Phosphorus-Potassium), three areas received a low dose of the fertilizer (187.5 g/m²) and the other three areas represented the control. The fertilizer was applied every week. Environmental parameters and meiofauna were sampled using three-to-four week intervals. Six samplings were subsequently performed maintaining this interval. Meiofauna was counted and identified to major taxonomic groups. Meiofauna community structure varied throughout the experimental areas. Control areas maintained their abundance values during the study period, but within the enriched areas meiofauna abundance decreased greatly. MDS and ANOSIM analysis showed significant variation in the meiofauna community structure among experimental areas and also along the experimental period in the enriched areas.
A aplicação in situ de fertilizantes inorgânicos foi utilizada para simular a eutrofização associada ao cultivo da cana-de-açúcar. A estrutura da associação de meiofauna foi analisada com o objetivo de avaliar este impacto. O experimento de enriquecimento do sedimento foi desenvolvido em nove áreas quadrangulares de 4m² distribuídas de forma aleatória no mediolitoral da área estuarina. Três áreas foram enriquecidas com alta concentração (375 g/m²) de NPK (Nitrogênio-Fósforo-Potássio), três com baixa concentração (187,5 g/m²) e as demais tratadas como controle. Os fertilizantes foram aplicados semanalmente. Os parâmetros físico-químicos do sedimento e a meiofauna bentônica foram coletados após três a quatro semanas da aplicação dos fertilizantes. Obedecendo este intervalo foram realizadas 6 amostragens subseqüentes. As amostras foram triadas e a meiofauna contada e identificada em nível de grande grupo. As respostas da meiofauna variaram de acordo com a área: enquanto a área Controle manteve sua abundância total durante todo o experimento, as áreas tratadas apresentaram forte queda nas densidades totais. A ordenação MDS e a análise ANOSIM evidenciaram mudanças significativas na estrutura da associação de meiofauna entre as áreas e também ao longo do experimento nas áreas tratadas

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Vertical distribution and feeding types of nematodes from Chetumal Bay, Quintana Roo, Mexico

Cited by 9 publications

References 16 publications

Diversity patterns of free‐living marine nematodes in the southwest continental shelf off Bay of Bengal and their link to abiotic variables

Diversity patterns of free‐living marine nematodes in the southwest continental shelf off Bay of Bengal and their link to abiotic variables

Community structure and biodiversity of free-living marine nematodes in the northern South China Sea

Response of estuarine meiofauna assemblage to effects of fertilizer enrichment used in the sugar cane monoculture. Pernambuco, Brazil

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