Control of Plant Species Richness and Zonation of Functional Groups along a Freshwater Flooding Gradient

Lenssen, J.P.M.; Menting, F.B.J.; Putten, Wim H. van der; Blom, K.

doi:10.2307/3546656

Cited by 122 publications

(120 citation statements)

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“…Isto significa que as sementes que passam por submersão, tenderam a apresentar porcentagem de plântulas anormais maiores em relação às sementes não alagadas, porém quando o alagamento foi prolongado, ocorreu acentuada morte de sementes (Figura 3). No entanto, algumas sementes podem suportar inundações temporárias (Souza et al, 1999) e pode existir diferenças varietais na taxa de sobrevivência das sementes após alagamento (Saka & Izawa, 1999;Lenssen et al, 1999). Na Figura 3 foram apresentados os resultados porcentuais de sementes mortas após submersão.…”

Section: Fig 4 Resultados Médios De Comprimento De Raiz (A) E De Hiunclassified

“…Desta forma, a semente, já danificada, tem menor quantidade de energia disponível para o processo germinativo, refletindo em menor vigor (Richard et al, 1991). No entanto, algumas sementes podem suportar inundações temporárias (Souza et al, 1999) e podem existir diferenças varietais na taxa de sobrevivência das sementes após o alagamento (Saka & Izawa, 1999;Lenssen et al,1999).…”

Section: Introductionunclassified

“…Entre esses, o excesso de chuva, logo após a semeadura, pode ser um fator limitante à produção, por causar deterioração das sementes levando à menor emergência das plântulas em campo (Duke & Kakefuda, 1981;Blom, 1999).…”

Section: Introductionunclassified

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Efeito da submersão em água de sementes de feijão na germinação e no vigor

Custódio¹,

Neto²,

Ito³

et al. 2002

Rev. bras. sementes

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Section: Fig 4 Resultados Médios De Comprimento De Raiz (A) E De Hiunclassified

Section: Introductionunclassified

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Efeito da submersão em água de sementes de feijão na germinação e no vigor

Custódio¹,

Neto²,

Ito³

et al. 2002

Rev. bras. sementes

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“…Partial elimination of the dominant species, as a consequence of mowing and fishing out, results in the development of new ecological niches, which can be occupied by new taxa. Consequently, we can observe an increase in the species richness together with a reduction in the total cover (Lenssen et al 1999). This kind of phenomenon was also observed in the studied lakes.…”

Section: Discussionmentioning

confidence: 99%

“…Due to homogeneity of abiotic conditions, usually dense, monospecies phytocoenoses occur in the lakes, which cover considerably large areas of the littoral zone (Lenssen et al 1999). Partial elimination of the dominant species, as a consequence of mowing and fishing out, results in the development of new ecological niches, which can be occupied by new taxa.…”

Section: Discussionmentioning

confidence: 99%

The influence of hydromorphological modifications of the littoral zone in lakes on macrophytes

Jusik

Macioł

2014

Oceanological and Hydrobiological Studies

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The study aimed at determining the influence of hydromorphological modifications of the littoral zone in lakes on the occurrence and quantitative diversity of macrophytes. The field research was carried out at the peak of the growing season (June -September) between 2006 and 2009. Altogether, 457 transects were studied, located in 5 lakes. Studies on the hydromorphology were performed with the method of Lake Habitat Survey (LHS), and on macrophytes − with the method of transects. The studied sites were divided into 3 groups of different intensity of morphological transformations. The identified groups constituted the starting point for the analysis of influence exerted by transformations on macrophytes. The obtained results indicate that hydromorphological modifications * Corresponding author: szyjus.up@gmail.com of lakes are an important ecological factor affecting the occurrence and quantitative diversity of macrophytes. The transformations recorded in the studied reservoirs resulted mostly from recreational exploitation. They were responsible for mechanical elimination of dominant species, which led to an increased number of taxa, synanthropization and an average level of hemeroby as well as a decrease in the total vegetation cover. Helophytes were the most negatively affected group by the transformations, which reduce their contribution in the vegetation cover, whereas macroscopic filamentous algae and elodeids were positively affected.

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Doing ecohydrology backward: Inferring wetland flow and hydroperiod from landscape patterns

Acharya

Kaplan

Jawitz

et al. 2017

Water Resources Research

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Human alterations to hydrology have globally impacted wetland ecosystems. Preventing or reversing these impacts is a principal focus of restoration efforts. However, restoration effectiveness is often hampered by limited information on historical landscape properties and hydrologic regime. To help address this gap, we developed a novel statistical approach for inferring flows and inundation frequency (i.e., hydroperiod, HP) in wetlands where changes in spatial vegetation and geomorphic patterns have occurred due to hydrologic alteration. We developed an analytical expression for HP as a transformation of the landscape‐scale stage‐discharge relationship. We applied this model to the Everglades “ridge‐slough” (RS) landscape, a patterned, lotic peatland in southern Florida that has been drastically degraded by compartmentalization, drainage, and flow diversions. The new method reliably estimated flow and HP for a range of RS landscape patterns. Crucially, ridge‐patch anisotropy and elevation above sloughs were strong drivers of flow‐HP relationships. Increasing ridge heights markedly increased flow required to achieve sufficient HP to support peat accretion. Indeed, ridge heights inferred from historical accounts would require boundary flows 3–4 times greater than today, which agrees with restoration flow estimates from more complex, spatially distributed models. While observed loss of patch anisotropy allows HP targets to be met with lower flows, such landscapes likely fail to support other ecological functions. This work helps inform restoration flows required to restore stable ridge‐slough patterning and positive peat accretion in this degraded ecosystem, and, more broadly, provides tools for exploring interactions between landscape and hydrology in lotic wetlands and floodplains.

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Control of Plant Species Richness and Zonation of Functional Groups along a Freshwater Flooding Gradient

Cited by 122 publications

References 50 publications

Efeito da submersão em água de sementes de feijão na germinação e no vigor

Efeito da submersão em água de sementes de feijão na germinação e no vigor

The influence of hydromorphological modifications of the littoral zone in lakes on macrophytes

Doing ecohydrology backward: Inferring wetland flow and hydroperiod from landscape patterns

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