The effect of the 1997-1998 ENSO on the benthic macrofaunal biomass in the southwestern Gulf of Mexico
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Nacional Autónoma de México
2003
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| _version_ | 1876486223046901760 |
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| author | Elva Escobar Briones |
| author_facet | Elva Escobar Briones |
| contents | The effect of the 1997-1998 ENSO on the benthic macrofaunal biomass in the southwestern Gulf of Mexico Elva Escobar Briones Ciencias de la Tierra shelf slope export infauna Biogenic carbon Long term macrofaunal biomass measurements made since 1987 were used to evaluate the effect of episodic inputs ofbiogenic carbon during ENSO on the shelf and slope benthos in the southwestern Gulf of Mexico. This study was based on thehypothesis that wind- induced mixing over long periods on the sea surface of the Gulf of Mexico increases primary productivityexported to depth, that trophically sustains the benthic community by enhancing the macrofaunal biomass. The content of organicnitrogen in sediment was used to estimate sediment organic enrichment. Geographical and seasonal changes recorded previouslyin the region showed that macrofaunal biomass maxima occur during mixing in the water column and decrease with the onset ofstratification. Macrofaunal biomass recorded during 1998 was larger than in previous years: shelf 0.93±0.22 gC.m-2, slope 0.55±0.23gC.m-2, as compared to shelf 0.57±0.11gC.m-2, slope 0.18±0.09 gC.m-2. The shelf macrofaunal biomass showed a large variabilityin contrast to the values recorded on the slope. Seasonal inputs of phytodetritus produce sediment enrichment and correlate withmacrofaunal biomass changes (shelf r= 0.77; slope r= 0.85). ENSO promotes stochastic pulses of phytodetrital material inducedby wind forcing that enrich the sediment and lead to a significant increase in the macrofaunal biomass. 2003 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56842323 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.42 |
| format | Artículo científico |
| id | redalyc_56842323 |
| institution | Redalyc |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | The effect of the 1997-1998 ENSO on the benthic macrofaunal biomass in the southwestern Gulf of Mexico Elva Escobar Briones Ciencias de la Tierra shelf slope export infauna Biogenic carbon The effect of the 1997-1998 ENSO on the benthic macrofaunal biomass in the southwestern Gulf of Mexico Elva Escobar Briones Ciencias de la Tierra shelf slope export infauna Biogenic carbon Long term macrofaunal biomass measurements made since 1987 were used to evaluate the effect of episodic inputs ofbiogenic carbon during ENSO on the shelf and slope benthos in the southwestern Gulf of Mexico. This study was based on thehypothesis that wind- induced mixing over long periods on the sea surface of the Gulf of Mexico increases primary productivityexported to depth, that trophically sustains the benthic community by enhancing the macrofaunal biomass. The content of organicnitrogen in sediment was used to estimate sediment organic enrichment. Geographical and seasonal changes recorded previouslyin the region showed that macrofaunal biomass maxima occur during mixing in the water column and decrease with the onset ofstratification. Macrofaunal biomass recorded during 1998 was larger than in previous years: shelf 0.93±0.22 gC.m-2, slope 0.55±0.23gC.m-2, as compared to shelf 0.57±0.11gC.m-2, slope 0.18±0.09 gC.m-2. The shelf macrofaunal biomass showed a large variabilityin contrast to the values recorded on the slope. Seasonal inputs of phytodetritus produce sediment enrichment and correlate withmacrofaunal biomass changes (shelf r= 0.77; slope r= 0.85). ENSO promotes stochastic pulses of phytodetrital material inducedby wind forcing that enrich the sediment and lead to a significant increase in the macrofaunal biomass. 2003 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56842323 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.42 |
| title | The effect of the 1997-1998 ENSO on the benthic macrofaunal biomass in the southwestern Gulf of Mexico |
| topic | Ciencias de la Tierra shelf slope export infauna Biogenic carbon |
| url | https://www.redalyc.org/articulo.oa?id=56842323 |