Recruitment from the Seed Bank and the Development of Zonation of Emergent Vegetation During a Drawdown in a Prairie Wetland

Welling, Charles H.; Pederson, Roger L.; Valk, Arnold G. van der

doi:10.2307/2260607

Cited by 128 publications

(55 citation statements)

References 27 publications

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“…This method has been used to study the seed banks of prairie wetlands (van der Valk and Davis, 1978;van der Valk and Davis, 1979;Poiani and Johnson, 1988;Welling et al, 1988), riverine floodplains and wetlands (Brock and Rogers, 1998;Cellot et al, 1998;Abernathy and Willby, 1999), and submersed aquatic macrophyte communities (Kimber et al, 1995;McFarland and Rogers, 1998). This method has been shown to accurately predict the vegetation that may develop under specific conditions (van der Valk and Davis, 1978;Poiani and Johnson, 1988), although it may under-represent certain taxa that are uncommon or have specific growing conditions not met by the experimental conditions provided (van der Valk and Davis, 1978;Brown, 1998).…”

Section: Introductionmentioning

confidence: 99%

Composition of the seed bank in drawdown areas of Navigation Pool 8 of the Upper Mississippi River

Kenow

Lyon

2009

River Research & Apps

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In an effort to enhance aquatic plant production and habitat diversity on the Upper Mississippi River (UMR), resource managers considered water level reduction as a management tool to increase the area of emergent and submersed aquatic vegetation by natural seed germination. To quantify the availability of seed, we assessed the potential seed bank of selected areas of Navigation Pool 8 of the UMR from substrate samples collected in spring 2000. We tested these samples for viable seed content under four hydrologic conditions: dry, moist, shallow flooded and submerged. Forty-seven species were identified in the seed bank, including 27 obligate wetland, 10 facultative wetland and 7 upland species. Dominant taxa within the seed bank included Sagittaria spp., Lindernia dubia, Zosterella dubia, Cyperus spp., Eragrostis spp. and Leersia oryzoides. Of the four hydrologic treatments, moist substrates had the greatest species diversity and were the most productive, yielding an average density of 1420 seedlings m À2. Emergent and submersed aquatic species were widely distributed, each type occurring in more than 90% of the samples. Timing of seedling germination varied among species and has implications for scheduling drawdowns to promote establishment of desired species. Seed bank results were correlated with the vegetation response on substrates exposed during a reduction of water levels of Pool 8 during summer 2001. Experimentally determining the composition and viability of seed banks from drawdown areas provides information useful in predicting the types of vegetation that may develop on exposed substrates. Further, these findings provide resource managers a better understanding of the potential for achieving desired vegetation response through water level reductions. Published in

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Section: Introductionmentioning

confidence: 99%

Composition of the seed bank in drawdown areas of Navigation Pool 8 of the Upper Mississippi River

Kenow

Lyon

2009

River Research & Apps

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“…Germination is supposed to occur at sites most suitable for seedling establishment (Harper, 1977;Grime, 1979). In Scirpus, as in other emergent macrophytes, germination is predominately restricted to the transitional zone between land and water, or to bare mudflats which become exposed in periods of drought, the so-called drawdowns (Kadlec 1962;van der Valk & Davis 1978;Welling, Pederson & van der Valk 1988). In wetlands, however, water levels may change unpredictably, and even small changes may result in alternating periods of submergence and des iccation of seedlings.…”

Section: Introductionmentioning

confidence: 99%

Growth and Morphology of Scirpus lacustris and S. maritimus Seedlings as Affected by Water Level and Light Availability

Clevering¹,

Blom²,

Vierssen³

1996

Functional Ecology

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Summary1. Adults of the emergent macrophytes Scirpus lacustris ssp. lacustris {S.l. lacustris), S. lacustris ssp. tabernaem ontani (S.L tabernaem ontani) and S. maritimus occur along a gradient in water depth from deep to shallow water. This study examined whether seedlings of these taxa respond differently to changing hydrological conditions. 2. Seedlings of both S. lacustris subspecies showed the highest relative growth rate (RGR) under terrestrial growth conditions, whereas S. maritimus did so under submerged growth conditions. In all three taxa, shading reduced the mean RGR of terrestrial seedlings more strongly than that of submerged ones. 5. Growth of all three taxa was reduced considerably after seedlings were transferred from terrestrial to submerged growth conditions. This effect was stronger with increas ing age of seedlings. W hen transferred the other way round, seedlings of S.l. tabernae montani and S. m aritimus adapted quickly to the terrestrial growth conditions, whereas the thin leaves of S.L lacustris partly dried out. 6. It was concluded that although seedling establishment of all three Scirpus taxa will be most successful under terrestrial conditions, subsequent fluctuating water levels may act as a strong selective force. This may determine the distribution of Scirpus taxa along a gradient in water depth during seedling establishment.

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“…As informações sobre o banco de sementes podem subsidiar investigações sobre três aspectos da vegetação: sua composição, a abundância relativa das espécies recentemente instaladas e o potencial de distribuição de cada espécie (Welling et al, 1988). A composição do banco de sementes é função da composição das sementes produzidas pela vegetação e da longevidade das sementes de cada espécie, sob as condições locais (van der Valk & Pederson, 1989).…”

Section: Introductionunclassified

Avaliação do banco de sementes de uma área em processo de recuperação em cerrado campestre

Machado¹,

Santos

Pereira

et al. 2013

Planta daninha

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RESUMO -Os estudos que tratam da interferência de plantas daninhas em agroecossistemas têm produzido resultados de pesquisa abundantes para campos de produção de grãos e pastagens; contudo, poucos trabalhos relatam o efeito da presença desse grupo de plantas em áreas degradadas isoladas para recuperação. Diante disso, este trabalho teve como objetivo avaliar a influência do banco de sementes no solo no processo de restauração ambiental de uma área representativa de cerrado campestre pela presença de plantas daninhas gramíneas. Para avaliação do banco de sementes, foram selecionados três ambientes: dois degradados e um ambiente-referência (conservado) de cerrado campestre. O procedimento de coleta das amostras de solo ocorreu em duas estações (seca e chuvosa), e as amostras foram avaliadas em 300 dias. Foram verificadas, durante a avaliação, apenas seis espécies nativas, e somente duas com hábito de vida arbóreo. A maior parte das sementes germinadas para os ambientes degradados, em ambas as coletas, foram identificadas como invasoras na área de estudo. Nesse sentido, o banco de sementes do solo local não é suficiente para que haja recuperação por meio da sucessão ecológica dessas áreas, sendo recomendado o uso de técnicas visando acelerar a restauração desses ambientes.Palavras-chave: restauração de áreas degradadas, plantas daninhas, Melinis minutiflora.ABSTRACT -Studies dealing with the interference of weeds in agro-ecosystems have obtained abundant results for grain production fields and pastures. However, few studies have reported the effect of the presence of such a group of isolated plants on degraded areas under recovery. Thus, this study aims to evaluate the influence of the soil seed bank on the process of environmental restoration of a representative area of campestre cerrado due to the presence of weed grasses. To assess the seed bank, three environments were selected: two degraded environments and one reference-environment (preserved) of campestre cerrado. Soil samples were collected in two seasons (dry and wet), and evaluated in three hundred days. During the evaluation, only six native species and only two species with a habit of arboreal life were found. Most of the seeds which were germinated for the degraded environments in both collections were identified as invasive in the study area. In this sense, the local soil seed bank is not considered sufficient for recovery through ecological succession in these areas, and the use of techniques to accelerate the restoration of these environments is strongly recommended.

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Recruitment from the Seed Bank and the Development of Zonation of Emergent Vegetation During a Drawdown in a Prairie Wetland

Cited by 128 publications

References 27 publications

Composition of the seed bank in drawdown areas of Navigation Pool 8 of the Upper Mississippi River

Composition of the seed bank in drawdown areas of Navigation Pool 8 of the Upper Mississippi River

Growth and Morphology of Scirpus lacustris and S. maritimus Seedlings as Affected by Water Level and Light Availability

Avaliação do banco de sementes de uma área em processo de recuperação em cerrado campestre

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