Field Variability of Invading Populations of Spartina densiflora Brong. in Different Habitats of the Odiel Marshes (SW Spain)

Nieva, F. Javier J.; Díaz-Espejo, Antonio; Castellanos, Eloy M.; Figueroa, M.E.

doi:10.1006/ecss.2000.0750

Cited by 86 publications

(107 citation statements)

References 21 publications

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“…Since then, the evolution of the estuary has been studied from the chemical point of view, in relation to the origin, variation and nature of the heavy metals (Elbaz-Poulichet et al 2001;Ruiz 2001;Bermejo et al 2003;Sainz and Ruiz 2006;among others). There are some works related to distribution and migrations of birds (e.g., Sánchez et al 2006) and ecophysiology of salt-marsh macrophytes (e.g., Nieva et al 2001), but there are few studies related to the contamination effects on organisms, except some on Ostracoda and Foraminifera (Ruiz et al 2004;Ruiz et al 2008), and ecotoxicology (Luque et al 1999;Morillo et al 2005). On subtidal soft-bottom macrofauna there is only one investigation previous to the implementation of the Correction Plan (Cano and García 1987) and a sampling survey enclosed in a general study of the Gulf of Cadiz communities (Drake et al 1999).…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal variation of the benthic macrofauna in a grossly polluted estuary from southwestern Spain

2009

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The spatial-temporal variation of subtidal macrofauna communities of the OdielTinto estuary, one of the most polluted areas in the world, was studied along a sampling period of 4 years (and 3 sampling events). This system has shown typical water and sediment characteristics of estuarine areas although the inner stations showed high concentrations of heavy metals. The structure of the macrofauna community was associated with granulometry, the percentage of organic matter and the heavy metals.Like in other estuaries, the community was dominated by polychaetes (especially by small size opportunistic taxa), meanwhile the crustaceans were the least abundant. Some changes during the sampling period were: slight increment in richness and diversity; greater presence of molluscs and crustaceans in the inner zones; a more homogeneous spatial distribution of opportunistic taxa and a higher number of taxa involved in the differences among the estuary areas. The period of study does not allow assuring that these changes have been due to a true improvement or to natural cycles of the communities in naturally stressed systems. So that it would be necessary the establishment of a long-term monitoring programme to study the evolution of the macrofauna communities to state if the corrective measures could achieve an improvement of this environment. This programme should focus on the study of macrobenthic community's structure and on those selected parameters which have been the major structuring factors for these communities.

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Section: Introductionmentioning

confidence: 99%

Spatial and temporal variation of the benthic macrofauna in a grossly polluted estuary from southwestern Spain

2009

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“…Em um experimento com parcelas monoespecíficas de marismas na Argentina, Daleo et al (2008) observaram após 16 meses de adubação com NPK (19:5:5) apenas um incremento de 60% da densidade de hastes de S. densiflora, em relação a parcelas-controles (de 1632 para 2604 hastes m -2 ), enquanto S. alterniflora respondeu com um aumento da altura média da copa de 65% (de 60 para 99 cm) e dobrou o número de hastes (de 133 para 277 hastes m -2 ). O denso perfilhamento é a principal estratégia utilizada por S. densiflora para ocupação espacial e exclusão de plantas competidoras, tendo sido observado em marismas populações com 900 a 5000 hastes m -2 (Nieva et al, 2001;Costa et al, 2003;Daleo et al, 2008;. Melhores eficiências nutricionais e capacidade de crescimento, em solos de marismas pobres em nutrientes, têm sido atribuídas às monocotiledôneas com pequena distância entre nós nos rizomas e que formam tufos de hastes, como S. densiflora.…”

Section: Discussão Densidade De Plantio De S Alternifloraunclassified

“…Para otimização da produção de mudas em recipientes, é necessária a avaliação da resposta de crescimento ao adensamento de indivíduos. Nas marismas, gramas Spartina crescem em densidades de até 5000 hastes m -2 e suas raízes tendem a se concentrar no sedimento superficial, por causa da anoxia em camadas mais profundas (Nieva et al, 2001;Costa et al, 2003;Daleo et al, 2008). Logo, estas plantas apresentam um grande potencial de produção de mudas em recipientes, mas poucos estudos avaliaram esta possibilidade fitotécnica (Deng et al, 2008;Costa et al, 2011a;2011b) e faltam quantificações do efeito da densidade de plantio sobre a formação de perfilhos.…”

Section: Introductionunclassified

Efeitos da densidade de plantio e da adição de nutrientes na produção de mudas de gramas halófitas em recipientes

et al. 2016

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Efeitos da densidade de plantio e da adição de nutrientes na produção de mudas de gramas halófitas em recipientes 1 As gramas halófitas Spartina alterniflora e Spartina densiflora são espécies bioengenheiras, que podem ser utilizadas para mitigação de áreas degradadas de marismas e manguezais, para o controle da erosão costeira e para estabilização de dragado depositado em regiões estuarinas e costeiras. O objetivo deste trabalho foi avaliar os efeitos da densidade de plantio e da adubação com nitrogênio (N) e fósforo (P) sobre mudas de propagação vegetativa destas duas espécies, crescendo em bandejas (0,15 m Palavras-chave: Spartina spp., fertilização, perfilhamento, propagação vegetativa.

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“…Five wrack burial treatments were conducted: control (no wrack was added above the sand surface), 1 cm (1235 ± 92 g DW wrack m -2 ), 2 cm (3266 ± 13 g DW m -2 ), 4 cm (4213 ± 277 g DW m -2 ), and 8 cm (6138 ± 227 g DW m -2 ) of wrack burial depth. These treatments were decided following our field observations in Odiel Marshes (Southwest Iberian Peninsula) where S. densiflora is very abundant (Nieva et al 2001a). Each container had 25 seeds at one depth, so there were five treatments with four containers (replicates) per depth (n = 4 per treatment; n = 20, including all treatments together).…”

Section: Wrack Treatmentsmentioning

confidence: 99%

“…Just very few Spartina adult clumps were observed within the debris areas, which seemed to have established before wrack accumulation or within open patches in the wrack. Spartina densiflora tussocks accumulate high densities of dead tillers in middle and high marshes (Nieva et al 2001a) and when this necromasa is detached from the tussocks is accumulated as wrack. In view of our results, as S. densiflora invades a location it would decelerate its own invasion rate through the accumulation of wrack that may limit its establishment.…”

Section: Wrack Depth (Cm)mentioning

confidence: 99%

Wrack burial reduces germination and establishment of the invasive cordgrass Spartina densiflora

Abbas¹,

Rubio-Casal²,

Cires³

et al. 2014

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Germination and emergence of halophytes may decrease significantly by seed burial in dead plant material, or wrack, which is common and abundant in tidal marshes. The effects of plant debris (wrack) burial on seed germination and seedling establishment of Spartina densiflora, an invasive cordgrass, were studied under greenhouse conditions and compared with field observations. Five wrack burial depths were applied: control without wrack, 1 cm (1235 ± 92 g DW wrack m -2 ), 2 cm (3266 ± 13 g DW m -2 ), 4 cm (4213 ± 277 g DW m -2 ), and 8 cm (6138 ± 227 g DW m -2 ). Sediment pH, electrical conductivity, redox potential and temperature were recorded. Quiescence increased with wrack load up to ~20% at 8 cm deep. Germination decreased with wrack load from 96% to 14%, which could be related with anoxic conditions under the debris since sediment redox potential was as low as -83 ± 7 mV at 8 cm. Germination percentage increased and quiescent and dormant percentages decreased at higher daily sediment temperatures and with higher daily temperature fluctuations, conditions that were recorded without or under low loads of wrack. Spartina densiflora did not show primary dormancy, but its seeds entered into a non-deep physiological dormancy below 1 cm deep in plant debris. The establishment of S. densiflora seedlings was also greatly reduced by wrack burial since only 6 seedlings (11 ± 5 % of germinated seeds) emerged above plant debris from 1 cm and all seedlings died from deeper than 1 cm. S. densiflora seedling development was also reduced by wrack burial. The inverse relationship between germination and emergence of S. densiflora with wrack burial recorded in our study is useful to predict its invasion dynamics and to plan the management of invaded marshes. NeoBiotaAhmed Abbas et al. / NeoBiota 21: 65-79 (2014) 66

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Field Variability of Invading Populations of Spartina densiflora Brong. in Different Habitats of the Odiel Marshes (SW Spain)

Cited by 86 publications

References 21 publications

Spatial and temporal variation of the benthic macrofauna in a grossly polluted estuary from southwestern Spain

Spatial and temporal variation of the benthic macrofauna in a grossly polluted estuary from southwestern Spain

Efeitos da densidade de plantio e da adição de nutrientes na produção de mudas de gramas halófitas em recipientes

Wrack burial reduces germination and establishment of the invasive cordgrass Spartina densiflora

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