Daniel Martin | CSIC (Consejo Superior de Investigaciones Científicas-Spanish National Research Council) (original) (raw)
Papers by Daniel Martin
12 páginas, 6 figuras.Peer reviewe
Scientia Marina, 2007
Mediterranean coastal areas are threatened by coastal development that modifies the coastline thr... more Mediterranean coastal areas are threatened by coastal development that modifies the coastline through the construction of buildings and infrastructures such as roads, railways, promenades and ports. The main consequences of this development are changes in the deposition processes and wave regime that lead to increasing erosion. In addition, the sea-level rise and increasing storminess due to climate change may also contribute to beach recession and flooding in coastal areas. Along the Catalan coast, beach tourism is one of the main resources of the local economy, and there has SCIENTIA MARINA 71(2)
PLoS ONE, 2014
The cornerstones of sunken wood ecosystems are microorganisms involved in cellulose degradation. ... more The cornerstones of sunken wood ecosystems are microorganisms involved in cellulose degradation. These can either be free-living microorganisms in the wood matrix or symbiotic bacteria associated with wood-boring bivalves such as emblematic species of Xylophaga, the most common deep-sea woodborer. Here we use experimentally submerged pine wood, placed in and outside the Mediterranean submarine Blanes Canyon, to compare the microbial communities on the wood, in fecal pellets of Xylophaga spp. and associated with the gills of these animals. Analyses based on tag pyrosequencing of the 16S rRNA bacterial gene showed that sunken wood contained three distinct microbial communities. Wood and pellet communities were different from each other suggesting that Xylophaga spp. create new microbial niches by excreting fecal pellets into their burrows. In turn, gills of Xylophaga spp. contain potential bacterial symbionts, as illustrated by the presence of sequences closely related to symbiotic bacteria found in other wood eating marine invertebrates. Finally, we found that sunken wood communities inside the canyon were different and more diverse than the ones outside the canyon. This finding extends to the microbial world the view that submarine canyons are sites of diverse marine life.
Marine Pollution Bulletin, 2010
We compare foraminifera and macrofauna as bio-indicators of oil-based drill mud disposal site off... more We compare foraminifera and macrofauna as bio-indicators of oil-based drill mud disposal site off Congo. The most polluted sites are characterized by poor faunas, dominated by some very tolerant taxa. Slightly further from the disposal site, there is an area with strongly increased densities, heavily dominated by opportunistic taxa. Still further, macrofauna appears to be similar to that at the reference area, but the foraminiferal meiofauna still suggests a slight environmental perturbation. The foraminiferal FIEI index, based on the species distribution in the study area, appears to be more discriminative than the macrofaunal ITI index, based on a priori definitions of the trophic guilds of the various taxa. Our comparative approach allows us to point out the benefits of (1) the use of macrofauna and foraminifera together and (2) the definition of the species groups used in biotic indices on the basis of observations made directly in the study area.
Estuarine, Coastal and Shelf Science, 1998
The distribution and population structure of the serpulid polychaete Ditrupa arietina were assess... more The distribution and population structure of the serpulid polychaete Ditrupa arietina were assessed along the section of the Mediterranean coast between Barcelona and Montpellier. The study combined: (1) the analysis of the existing historical data referring to the period before the 1970s; (2) the results of impact assessment surveys carried out in the late 1980s and the 1990s; and (3) the results of two surveys carried out in the Bay of Blanes and along the coast between Cape Cerbère and Port-la-Nouvelle during 1996. The results of the surveys carried out in the 1990s show the occurrence of high densities (i.e. >1000 ind m 2 ) of Ditrupa arietina at all the sites sampled. These results can be compared with the few reports of this species before 1970, leading to the conclusion that D. arietina has recently increased all along the Catalan coast. Ditrupa arietina is preferentially found between 20 and 30 m depth, which mostly corresponds to well-sorted fine sands and muddy sands. Both the results of population monitoring and the heterogeneity of population structure at small spatial scale show that the dynamics of this species is unstable. The observed distribution pattern is therefore interpreted as resulting from a response to both wide-scale environmental parameters (accounting for the dramatic increase of the species at a wide geographical scale), and to local environmental factors (accounting for small-scale heterogeneity in population structure). Analysis of the relationship between sedimentary data and densities of D. arietina suggests that this species is highly sensitive to the presence of fine sediments. However, because of the regional importance of the phenomenon, it is concluded that the dramatic increase of D. arietina along both the Spanish and the French Catalan coast does not result from sediment instability.
Acta Oecologica, 1999
Within the frame of a wider research project on the littoral ecosystem of the Bay of Blanes (NW M... more Within the frame of a wider research project on the littoral ecosystem of the Bay of Blanes (NW Mediterranean), the dynamics of shallow soft-bottom macroinfaunal assemblages of medium-to-fine-sand sediment communities of Spisula subtruncata have been followed since March 1992. These assemblages exhibited a very predictive annual cycle. Abundance and biomass rose sharply during spring, followed by a striking drop through summer showing lower values during autumn and winter. These cycles were consistent with the temporal variation of key macroinfaunal species in these shallow habitats: Spisula subtruncata, Owenia fusiformis, Ditrupa arietina, Lucinella divaricata, Echinocardium mediterraneum, Spio decoratus, Chone infundibuliformis, Paradoneis armata, Mediomastus fragilis, Protodorvillea kefersteini, Branchiostoma lanceolatum, Glycera cf. capitata and Callista chione. These species were included in ecological groups based on the trends observed during the 4 years of seasonal dynamics which are presented.
[EN] The seasonal dynamics and community structure of the soft-bottom benthic macroinfauna, inhab... more [EN] The seasonal dynamics and community structure of the soft-bottom benthic macroinfauna, inhabiting shallow sublittoral in Blanes Bay (northwest Mediterranean Sea), were investigated from March 1992 to March 1993. Macroinfaunal abundance and ...
In this paper, we test the potential meroplankton grazing pressure on the nanoplanktonic communit... more In this paper, we test the potential meroplankton grazing pressure on the nanoplanktonic community at the Bay of Blanes (NW Mediterranean). We used 2 abundant polychaete larvae (Prionospio malmgreni and Loimia medusa) cultured in situ in dialysis bags from which possible nanoplankton grazers other than larvae had been removed by filtration. Ingestion rates on chlorophyll a ranged from 0.001 to 0.04 and from 0.045 to 0.117 pg larva-' d" for P. malmgreniand L medusa, respectively. Ingestion rates on heterotrophic nanoflagellates (HNF) ranged from 2.4 to 32.3 x 103 and from 20.8 to 128.0 X 103 cells larva-' d-' for P. m a h g r e n i and L. medusa, respectively. Scaling larval grazing to the natural plankton community results in: (1) a consumption on nanophytoplankton production ranging between 2.5 and ?.(l%, corresponding to percentages of nanophytoplankton loss in ambient waters of 2.3 to 6.4%, respectively; (2) a consumption on HNF production ranging between 3.1 and 12.4%, corre-spond~ng to percentages of HNF loss in ambient waters of 2 9 to 11.7 %, respectively. Although limited in time, the presence of planktotrophic larvae could cause an impact on nanophytoplankton populations which could be of similar relevance to that of holoplanktonic grazers, at least in shallow littoral waters of the Mediterranean Sea. Although potentially high, the estimated ingestion of nanophytoplankton by polychaete larvae was not sufficient to explain the major losses observed in the field, suggesting that these losses must be a result of consumption by other zooplanktonic grazers as well, and/or from processes other than herbivory. Contrary to nanophytoplankton and HNF, bacteria showed enhanced abundance in the presence of both polychaete larvae. Grazing by polychaete larvae caused a disruption of the grazing control exerted by HNF on bacteria. In conclusion, our results strongly indicate an important trophic role of meroplankton both as a direct control of the microbial holoplanktonic populations, and as a source of cascading effects in the microbial planktonic food webs.
12 páginas, 6 figuras.Peer reviewe
Scientia Marina, 2007
Mediterranean coastal areas are threatened by coastal development that modifies the coastline thr... more Mediterranean coastal areas are threatened by coastal development that modifies the coastline through the construction of buildings and infrastructures such as roads, railways, promenades and ports. The main consequences of this development are changes in the deposition processes and wave regime that lead to increasing erosion. In addition, the sea-level rise and increasing storminess due to climate change may also contribute to beach recession and flooding in coastal areas. Along the Catalan coast, beach tourism is one of the main resources of the local economy, and there has SCIENTIA MARINA 71(2)
PLoS ONE, 2014
The cornerstones of sunken wood ecosystems are microorganisms involved in cellulose degradation. ... more The cornerstones of sunken wood ecosystems are microorganisms involved in cellulose degradation. These can either be free-living microorganisms in the wood matrix or symbiotic bacteria associated with wood-boring bivalves such as emblematic species of Xylophaga, the most common deep-sea woodborer. Here we use experimentally submerged pine wood, placed in and outside the Mediterranean submarine Blanes Canyon, to compare the microbial communities on the wood, in fecal pellets of Xylophaga spp. and associated with the gills of these animals. Analyses based on tag pyrosequencing of the 16S rRNA bacterial gene showed that sunken wood contained three distinct microbial communities. Wood and pellet communities were different from each other suggesting that Xylophaga spp. create new microbial niches by excreting fecal pellets into their burrows. In turn, gills of Xylophaga spp. contain potential bacterial symbionts, as illustrated by the presence of sequences closely related to symbiotic bacteria found in other wood eating marine invertebrates. Finally, we found that sunken wood communities inside the canyon were different and more diverse than the ones outside the canyon. This finding extends to the microbial world the view that submarine canyons are sites of diverse marine life.
Marine Pollution Bulletin, 2010
We compare foraminifera and macrofauna as bio-indicators of oil-based drill mud disposal site off... more We compare foraminifera and macrofauna as bio-indicators of oil-based drill mud disposal site off Congo. The most polluted sites are characterized by poor faunas, dominated by some very tolerant taxa. Slightly further from the disposal site, there is an area with strongly increased densities, heavily dominated by opportunistic taxa. Still further, macrofauna appears to be similar to that at the reference area, but the foraminiferal meiofauna still suggests a slight environmental perturbation. The foraminiferal FIEI index, based on the species distribution in the study area, appears to be more discriminative than the macrofaunal ITI index, based on a priori definitions of the trophic guilds of the various taxa. Our comparative approach allows us to point out the benefits of (1) the use of macrofauna and foraminifera together and (2) the definition of the species groups used in biotic indices on the basis of observations made directly in the study area.
Estuarine, Coastal and Shelf Science, 1998
The distribution and population structure of the serpulid polychaete Ditrupa arietina were assess... more The distribution and population structure of the serpulid polychaete Ditrupa arietina were assessed along the section of the Mediterranean coast between Barcelona and Montpellier. The study combined: (1) the analysis of the existing historical data referring to the period before the 1970s; (2) the results of impact assessment surveys carried out in the late 1980s and the 1990s; and (3) the results of two surveys carried out in the Bay of Blanes and along the coast between Cape Cerbère and Port-la-Nouvelle during 1996. The results of the surveys carried out in the 1990s show the occurrence of high densities (i.e. >1000 ind m 2 ) of Ditrupa arietina at all the sites sampled. These results can be compared with the few reports of this species before 1970, leading to the conclusion that D. arietina has recently increased all along the Catalan coast. Ditrupa arietina is preferentially found between 20 and 30 m depth, which mostly corresponds to well-sorted fine sands and muddy sands. Both the results of population monitoring and the heterogeneity of population structure at small spatial scale show that the dynamics of this species is unstable. The observed distribution pattern is therefore interpreted as resulting from a response to both wide-scale environmental parameters (accounting for the dramatic increase of the species at a wide geographical scale), and to local environmental factors (accounting for small-scale heterogeneity in population structure). Analysis of the relationship between sedimentary data and densities of D. arietina suggests that this species is highly sensitive to the presence of fine sediments. However, because of the regional importance of the phenomenon, it is concluded that the dramatic increase of D. arietina along both the Spanish and the French Catalan coast does not result from sediment instability.
Acta Oecologica, 1999
Within the frame of a wider research project on the littoral ecosystem of the Bay of Blanes (NW M... more Within the frame of a wider research project on the littoral ecosystem of the Bay of Blanes (NW Mediterranean), the dynamics of shallow soft-bottom macroinfaunal assemblages of medium-to-fine-sand sediment communities of Spisula subtruncata have been followed since March 1992. These assemblages exhibited a very predictive annual cycle. Abundance and biomass rose sharply during spring, followed by a striking drop through summer showing lower values during autumn and winter. These cycles were consistent with the temporal variation of key macroinfaunal species in these shallow habitats: Spisula subtruncata, Owenia fusiformis, Ditrupa arietina, Lucinella divaricata, Echinocardium mediterraneum, Spio decoratus, Chone infundibuliformis, Paradoneis armata, Mediomastus fragilis, Protodorvillea kefersteini, Branchiostoma lanceolatum, Glycera cf. capitata and Callista chione. These species were included in ecological groups based on the trends observed during the 4 years of seasonal dynamics which are presented.
[EN] The seasonal dynamics and community structure of the soft-bottom benthic macroinfauna, inhab... more [EN] The seasonal dynamics and community structure of the soft-bottom benthic macroinfauna, inhabiting shallow sublittoral in Blanes Bay (northwest Mediterranean Sea), were investigated from March 1992 to March 1993. Macroinfaunal abundance and ...
In this paper, we test the potential meroplankton grazing pressure on the nanoplanktonic communit... more In this paper, we test the potential meroplankton grazing pressure on the nanoplanktonic community at the Bay of Blanes (NW Mediterranean). We used 2 abundant polychaete larvae (Prionospio malmgreni and Loimia medusa) cultured in situ in dialysis bags from which possible nanoplankton grazers other than larvae had been removed by filtration. Ingestion rates on chlorophyll a ranged from 0.001 to 0.04 and from 0.045 to 0.117 pg larva-' d" for P. malmgreniand L medusa, respectively. Ingestion rates on heterotrophic nanoflagellates (HNF) ranged from 2.4 to 32.3 x 103 and from 20.8 to 128.0 X 103 cells larva-' d-' for P. m a h g r e n i and L. medusa, respectively. Scaling larval grazing to the natural plankton community results in: (1) a consumption on nanophytoplankton production ranging between 2.5 and ?.(l%, corresponding to percentages of nanophytoplankton loss in ambient waters of 2.3 to 6.4%, respectively; (2) a consumption on HNF production ranging between 3.1 and 12.4%, corre-spond~ng to percentages of HNF loss in ambient waters of 2 9 to 11.7 %, respectively. Although limited in time, the presence of planktotrophic larvae could cause an impact on nanophytoplankton populations which could be of similar relevance to that of holoplanktonic grazers, at least in shallow littoral waters of the Mediterranean Sea. Although potentially high, the estimated ingestion of nanophytoplankton by polychaete larvae was not sufficient to explain the major losses observed in the field, suggesting that these losses must be a result of consumption by other zooplanktonic grazers as well, and/or from processes other than herbivory. Contrary to nanophytoplankton and HNF, bacteria showed enhanced abundance in the presence of both polychaete larvae. Grazing by polychaete larvae caused a disruption of the grazing control exerted by HNF on bacteria. In conclusion, our results strongly indicate an important trophic role of meroplankton both as a direct control of the microbial holoplanktonic populations, and as a source of cascading effects in the microbial planktonic food webs.