Improved dissolved oxygen status following removal of exotic weed mats in important fish habitat lagoons of the tropical Burdekin River floodplain, Australia

Perna, Colton; Burrows, Damien

doi:10.1016/j.marpolbul.2004.10.050

Cited by 74 publications

(62 citation statements)

References 7 publications

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“…The most commonly documented effects of floating meadows are lower dissolved oxygen concentrations [7] [8] [23] [24]. During the decomposition of plant debris in a floodplain lake with a dense cover of E. crassipes, the oxygen concentration remained near zero [15].…”

Section: Discussionmentioning

confidence: 99%

The Influence of Water Hyacinth Floating Meadows on Limnological Characteristics in Shallow Subtropical Waters

Casco¹,

Carnevali²,

Poi³

et al. 2014

AJPS

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The effects of free-floating mats of the water hyacinth Eichhornia crassipes (Mart.) Solms on the limnological characteristics of two lakes located on the fringing floodplain of the lower Paraná River (27˚27'S, 58˚55'W) were studied monthly between April 1998 and April 1999. The mobility of the free-floating vegetation at both locations prevented continual observation. Therefore, to carry out the intensive sampling needed for this study, two experimental ponds (A and B) were filled with water from the Paraná River in 1996. Pond A was designed to reproduce conditions similar to those of lakes vegetated with water hyacinth. Pond B was designed to recreate the limnological conditions of these lakes, such as a high concentration of dissolved and fine particulate organic matter and a peat layer on the bottom; however, pond B lacked macrophytes. Natural lakes covered with free-floating vegetation were very similar to pond A, but these water bodies showed a lower temperature, dissolved oxygen level and pH and a higher conductivity than the non-vegetated pond. Our results indicated that water hyacinth has a strong local influence on the limnological conditions in subtropical shallow lakes. Our results may assist in developing causeconsequence models by demonstrating the relevance of the effect of thermal damping produced by floating meadows.

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Section: Discussionmentioning

confidence: 99%

The Influence of Water Hyacinth Floating Meadows on Limnological Characteristics in Shallow Subtropical Waters

Casco¹,

Carnevali²,

Poi³

et al. 2014

AJPS

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“…The weed's rapid growth rate creates chronic shortage of dissolved oxygen required by the water's fauna and the flora [1,2]. Perna and Burrows [3] noted that the water hyacinth cover on water bodies reduces the gaseous exchanges that take place at the air-water interface and reduce the photosynthetic activity of submerged plants by hindering the penetration of the sun's rays. Figure 1 shows the clogged Manyame river, one of the tributaries of Lake Chivero.…”

Section: Introductionmentioning

confidence: 99%

On the potential of water hyacinth as a biomass briquette for heating applications

Munjeri

Ziuku

Maganga

et al. 2015

Int J Energy Environ Eng

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This article highlights the environmental challenge posed by water hyacinth on fresh water sources in Zimbabwe and investigates the use of the harvested weed as a source of energy in the form of briquettes. The water hyacinth (Eichhornia crassipes), known to be native to South America, has now become an environmental and social challenge throughout most water sources in Zimbabwe. It adversely affects the environment and humans in diverse ways. However, the plant leaves and stem release thermal energy when burned. The amount of thermal energy released depends on the moisture content and other factors. The water hyacinth organic matter and other leaf species were briquetted and their thermal energy content investigated in this exercise. The thermal energy content of the various samples was measured using a bomb calorimeter. Results of the experiments showed that the calorific value of briquetted hyacinth was 14.55 MJ/kg. The calorific value of briquetted samples of other eleven leaf species ranged from 14 to 20 MJ/kg. Moisture content, volatile matter and ash content results of the samples are also reported in this paper. The results show that water hyacinth briquettes can be used as thermal and lighting energy source particularly for communities staying in the vicinity of the affected water sources.

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“…Increased water temperature results in increased biological productivity (i.e. algal blooms), which in turn decreases dissolved oxygen concentrations and may even cause anoxic conditions in creeks, rivers and estuaries (NOAA 1998;Perna and Burrows 2005). It is likely that the first flooding event of a wet season pushes low quality water with low dissolved oxygen concentrations into nearshore regions.…”

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confidence: 99%

Wet-season effects on the distribution of juvenile pigeye sharks, Carcharhinus amboinensis, in tropical nearshore waters

Knip

Heupel

Simpfendorfer

et al. 2011

Mar. Freshwater Res.

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Abstract. Tropical nearshore environments are highly dynamic systems owing to extreme freshwater flow and flooding episodes that occur in wet-season months. We hypothesised that juvenile sharks in tropical nearshore waters respond to seasonal freshwater inflow by moving away from areas of strong flow. An array of fifty-eight acoustic receivers deployed in Cleveland Bay, north Queensland, Australia, passively tracked thirty-two juvenile pigeye sharks, Carcharhinus amboinensis, throughout two wet seasons from 2008 to 2010. Influences associated with wet seasons appeared to play a role in habitat use by juvenile C. amboinensis in this region. Home ranges and distribution of individuals showed distinct changes, with individuals moving north away from sources of freshwater inflow during high flows. The location of individuals within the bay was strongly influenced by freshwater inflow in both years. Although juvenile C. amboinensis moved in response to freshwater inflow, home-range sizes remained stable, and the amount of space individuals used did not change in relation to freshwater inflow. By defining the response of juvenile sharks to highly variable freshwater flow events, this research provides useful information for understanding species behaviour in a dynamic and changing climate, and contributes towards effective management of tropical river systems.

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Improved dissolved oxygen status following removal of exotic weed mats in important fish habitat lagoons of the tropical Burdekin River floodplain, Australia

Cited by 74 publications

References 7 publications

The Influence of Water Hyacinth Floating Meadows on Limnological Characteristics in Shallow Subtropical Waters

The Influence of Water Hyacinth Floating Meadows on Limnological Characteristics in Shallow Subtropical Waters

On the potential of water hyacinth as a biomass briquette for heating applications

Wet-season effects on the distribution of juvenile pigeye sharks, Carcharhinus amboinensis, in tropical nearshore waters

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