Adaptations to flooding in plants from river areas

Blom, C.W.P.M.; Bögemann, Gerard M.; Laan, Patrick; Sman, A.J.M. van der; Steeg, H.M. van de; Voesenek, L.A.C.J.

doi:10.1016/0304-3770(90)90097-5

Cited by 138 publications

(108 citation statements)

References 35 publications

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“…Flood events have three major effects: depletion of oxygen in the soil pores, change in pore water chemistry because of flood-water penetration, and increased soil nutrient content by sedimentation (Blom et al 1990;Visser et al 2003;Kozerski 2003;Walls et al 2005). These major effects may cause a variety of biogeochemical changes on their turn.…”

Section: Introductionmentioning

confidence: 99%

Biogeochemical consequences of winter flooding in brook valleys

et al. 2007

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Climatic change has great impacts on stream catchments and their ecology. Expectations are that more extreme climate events will result in undesired flooding in stream catchments. In the Netherlands, former floodplains with a history of agricultural use are put into use again as flooding areas for the purpose of water retention. This study focuses on the effects of winter flooding on various plant site conditions in the soil, such as redox, nutrient, pH, and base status. We compared the effects on groundwater-and rainwater-dominated floodplains. Water chemistry (pH, EC, HCO 3 , SO 4 , Cl, Ca, Mg, Na, K, p CO 2 , NO 3 , NH 4 , and PO 4 ) and soil nutrients (Total N and P, and bio-available P) were monitored for one year, including a 3-4 month period with winter flooding. In both floodplains no direct effect of the flood-water chemistry was detected in the pore water, because the soil pores had become saturated with groundwater or rainwater, respectively, just before flooding, flood-water did not penetrate the soil. We found that the increase in pH and ammonium concentration in the rainwater floodplain were due to changes in redox status, resulting from the completely water-filled state of the soil pores during the flooding event. Furthermore, we noticed an increase in soil nutrient contents and a shift in plant species composition in the rainwater floodplain: the vegetation included more plant species characteristic for N-richness. Finally, we conclude that winter flooding has more drastic effects on biogeochemical conditions and vegetation composition in the atmotrophic conditions characteristic for low-order subcatchments than in lithotrophic conditions in the larger, higher-order subcatchments of the stream basin.

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Section: Introductionmentioning

confidence: 99%

Biogeochemical consequences of winter flooding in brook valleys

et al. 2007

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“…The water level variation is one of the more important factors associated with plant zonation as well as with the macrophytes biomass (Lieffers, 1984;Blom et al, 1990;Junk & Piedade, 1993;Menezes et al, 1993;Camargo & Esteves, 1996). According to Camargo & Esteves (1995) in the aquatic environment with no significant seasonal variations of water level, biomass changes are low.…”

Section: Introductionmentioning

confidence: 99%

The water level influence on biomass of Echinochloa polystachya (Poaceae) in the Jurumirim Reservoir (São Paulo, Brazil)

2001

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In the Paranapanema River mouth, Jurumirim Reservoir (23 o 27'-23 o 29'S and 48 o 39'-48 o 36'W, SP, Brazil), the biomass of E. polystachya was monthly determined with eight quadrats of 0.25 m 2 from August 1993 to July 1994. The seasonal variation in biomass was unimodal, with greater biomass from November 1993 to April 1994. The average biomass was 1,933.7 ± 479.5 gDW.m -2 , with a variation along the year from 1,149.0 to 2,755.9 gDW.m -2 . The annual variation of aerial green biomass, aerial and aquatic detritus suggest that the main growth period of E. polystachya was from December

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“…Aliado a esse fato, também houve necessidade de se rebaixar o nível da água, com a finalidade de realizar reparo nas paredes da barragem. Sabe-se que, quando ocorre abaixamento seguido de rápida elevação, pode haver interferência na produtividade de macrófi-tas devido a alterações provocadas sobretudo na disponibilidade da luz (Blom et al, 1990).…”

Section: Resultsunclassified

Biomassa de Egeria densa nos reservatórios da hidroelétrica de Paulo Afonso-Bahia

2008

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RESUMO -Com o objetivo de conhecer a produção de biomassa de Egeria densa, foi monitorado o crescimento de 50 ápices de diferentes plantas, em três reservatórios situados na cidade de Paulo Afonso-BA. Os ápices inicialmente medidos receberam uma marcação e foram coletados após 15 dias. O material foi conduzido ao laboratório para medição da biomassa, após secagem a 70 o C. De todos os meses analisados, observou-se nas estações de Taquari e Moxotó maior crescimento em maio/99, com médias de 9,14 ± 3,6 e 4,2 ± 2,1 cm/ápice/ 15 dias, respectivamente, assim como na estação de Quebra em maio/98 (11,3 ± 5,3 cm/ ápice/15 dias), correspondendo ao período chuvoso. A biomassa também apresentou produções máximas no período chuvoso, com 0,26 ± 0,17, 0,41 ± 0,06 e 0,10 ± 0,5 g MS/ ápice/15 dias nas estações de Taquari, Quebra e Moxotó, respectivamente. E. densa demonstrou ter capacidade de acumular grande quantidade de massa seca, sobretudo no período de maior precipitação, quando geralmente ocorre maior disponibilidade de nutrientes.Palavras-chave: hydrocharitaceae, planta daninha, crescimento, reservatório.ABSTRACT -In order to estimate biomass production of Egeria densa, the growth of 50 different plant shoots was monitored at three reservoirs, both located in Paulo Afonso-Bahia. The shoots were marked and had their length measured. Fifteen days later they were measured again, collected, dried at 70 o C and weighed. The following highest shoot elongation during the 15 days occurred in May 1999 in Taquari and Moxotó and May 1998 in Quebra: 9.14 ± 3.6, 4.2 ± 2.1 and 11.3 ± 5.3 cm/shoot, respectively, corresponding to the following highest biomass accumulations, 0.26 ± 0.17, 0.10 ± 0.05 and 0.41 ± 0.06 g of dry mass per shoot, respectively. Therefore, E. densa has a very high capacity of biomass accumulation, mainly during the rainy period when nutrient availability is at the highest.Keywords: hydrocharitaceae, weed, growth, reservoir. INTRODUÇÃOAs macrófitas aquáticas possuem papel relevante nos ecossistemas continentais, pois, em condições naturais, mantêm a oxigenação da água, protegem as margens contra a erosão, servem como local de abrigo, alimentação e reprodução para diversos animais, bem como atuam como substrato para a comunidade perifítica. Destacam-se, ainda, como a principal comunidade produtora de biomassa da região litorânea, podendo interferir na estrutura e dinâmica desse ambiente (Esteves, 1998). Apesar dessas relevantes funções, podem causar diversos efeitos negativos, transformando-se em problema quando deixam de coexistir em

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Adaptations to flooding in plants from river areas

Cited by 138 publications

References 35 publications

Biogeochemical consequences of winter flooding in brook valleys

Biogeochemical consequences of winter flooding in brook valleys

The water level influence on biomass of Echinochloa polystachya (Poaceae) in the Jurumirim Reservoir (São Paulo, Brazil)

Biomassa de Egeria densa nos reservatórios da hidroelétrica de Paulo Afonso-Bahia

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